/* roulang page: index */
:root {
            --bg-primary: #0D0F14;
            --bg-card: #14171E;
            --bg-card-light: #1A1D24;
            --bg-elevated: #1E2129;
            --text-primary: #F5F1EA;
            --text-secondary: #B8B2AA;
            --text-muted: #7A7670;
            --accent-cyan: #00D9A6;
            --accent-cyan-glow: rgba(0, 217, 166, 0.25);
            --accent-orange: #FF6B3D;
            --accent-orange-glow: rgba(255, 107, 61, 0.22);
            --accent-purple: #7A4DFF;
            --accent-purple-glow: rgba(122, 77, 255, 0.2);
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 217, 166, 0.45);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition-fast: 0.2s ease;
            --transition-medium: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 82px;
            --sticky-bar-height: 64px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            overflow-x: hidden;
            padding-bottom: var(--sticky-bar-height);
            position: relative;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover,
        a:focus {
            color: var(--accent-orange);
            outline: none;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        button {
            font-family: var(--font-sans);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 顶部导航栏 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }

        .nav-logo-area {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .nav-logo {
            font-size: 32px;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            line-height: 1;
            white-space: nowrap;
        }

        .nav-logo .logo-accent {
            color: var(--accent-cyan);
        }

        .nav-divider {
            width: 1px;
            height: 32px;
            background: var(--border-color);
            flex-shrink: 0;
        }

        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            justify-content: flex-end;
        }

        .nav-links-desktop a {
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 13px;
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .nav-links-desktop a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.06);
        }

        .nav-links-desktop a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 13px;
            right: 13px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--accent-cyan-glow);
        }

        .nav-toggle {
            display: none;
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            font-size: 20px;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast), border-color var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            background: var(--bg-elevated);
            border-color: var(--accent-cyan);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(13, 15, 20, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 99;
            padding: 24px 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-nav.open {
            display: flex;
        }

        .mobile-nav a {
            color: var(--text-secondary);
            font-size: 18px;
            font-weight: 500;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            border-bottom: 1px solid var(--border-color);
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .mobile-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.06);
        }

        .mobile-nav a.active {
            color: var(--accent-cyan);
            font-weight: 700;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 13px;
        }

        /* ===== Hero 首屏 ===== */
        .hero-section {
            position: relative;
            min-height: calc(100vh - var(--header-height));
            display: flex;
            align-items: center;
            padding: 80px 0 100px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 15, 20, 0.92) 0%, rgba(13, 15, 20, 0.7) 45%, rgba(13, 15, 20, 0.88) 100%);
            z-index: 1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(circle at 30% 40%, rgba(0, 217, 166, 0.08) 0%, transparent 60%),
                radial-gradient(circle at 75% 65%, rgba(255, 107, 61, 0.07) 0%, transparent 55%),
                radial-gradient(circle at 55% 20%, rgba(122, 77, 255, 0.06) 0%, transparent 50%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-section::before,
        .hero-section::after {
            z-index: 1;
        }

        .hero-section .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 0.9fr;
            gap: 40px;
            align-items: center;
        }

        .hero-badge-row {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.3px;
        }

        .hero-badge.cyan {
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 217, 166, 0.3);
        }

        .hero-badge.orange {
            background: var(--accent-orange-glow);
            color: var(--accent-orange);
            border: 1px solid rgba(255, 107, 61, 0.3);
            animation: pulse-badge 2s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%, 100% { box-shadow: 0 0 0 0 rgba(255, 107, 61, 0.35); }
            50% { box-shadow: 0 0 0 8px rgba(255, 107, 61, 0); }
        }

        .hero-title {
            font-size: clamp(32px, 4.5vw, 52px);
            font-weight: 900;
            line-height: 1.22;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
            color: var(--text-primary);
        }

        .hero-title .highlight {
            color: var(--accent-cyan);
            position: relative;
        }

        .hero-title .highlight-orange {
            color: var(--accent-orange);
        }

        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-cta-row {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 700;
            letter-spacing: 0.3px;
            cursor: pointer;
            border: 2px solid transparent;
            transition: all var(--transition-medium);
            white-space: nowrap;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--accent-cyan);
            color: #0D0F14;
            box-shadow: 0 4px 20px rgba(0, 217, 166, 0.3);
        }

        .btn-primary:hover {
            background: var(--accent-orange);
            color: #fff;
            box-shadow: 0 6px 28px rgba(255, 107, 61, 0.4);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border-color: rgba(255, 255, 255, 0.25);
        }

        .btn-secondary:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.08);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 14px;
            border-radius: var(--radius-sm);
        }

        .btn-xs {
            padding: 6px 14px;
            font-size: 13px;
            border-radius: var(--radius-sm);
            font-weight: 600;
        }

        .hero-stats-row {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            text-align: left;
        }

        .hero-stat-number {
            font-size: 26px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
        }

        .hero-stat-number .unit {
            font-size: 16px;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-left: 2px;
        }

        .hero-stat-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        .hero-right-panel {
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .hero-promo-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px 26px;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .hero-promo-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-orange));
        }

        .hero-promo-tag {
            display: inline-block;
            background: var(--accent-orange);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 4px;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .hero-promo-card h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .hero-promo-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .hero-promo-progress {
            height: 6px;
            background: var(--bg-card-light);
            border-radius: 3px;
            overflow: hidden;
            margin: 10px 0;
        }

        .hero-promo-progress .bar {
            height: 100%;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-orange));
            border-radius: 3px;
            width: 72%;
            transition: width 1s ease;
        }

        .hero-promo-meta {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
        }

        .hero-explosion {
            position: absolute;
            top: -14px;
            right: -8px;
            width: 72px;
            height: 72px;
            background: radial-gradient(circle, var(--accent-orange) 30%, rgba(255, 107, 61, 0.85) 60%, transparent 75%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            font-weight: 900;
            color: #fff;
            text-align: center;
            line-height: 1.15;
            letter-spacing: 0.5px;
            box-shadow: 0 8px 32px rgba(255, 107, 61, 0.45);
            animation: float-explosion 3s ease-in-out infinite;
            transform: rotate(12deg);
            z-index: 3;
        }

        @keyframes float-explosion {
            0%, 100% { transform: rotate(12deg) translateY(0); }
            50% { transform: rotate(9deg) translateY(-8px); }
        }

        /* ===== Section 通用 ===== */
        .section-block {
            padding: 80px 0;
            position: relative;
        }

        .section-block.alt-bg {
            background: var(--bg-card);
        }

        .section-header {
            margin-bottom: 44px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .section-title {
            font-size: clamp(26px, 3.2vw, 36px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: -0.3px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 680px;
        }

        /* ===== 内容日历 ===== */
        .calendar-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .calendar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 20px 16px;
            transition: all var(--transition-medium);
            position: relative;
            overflow: hidden;
        }

        .calendar-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), transparent);
            opacity: 0;
            transition: opacity var(--transition-fast);
        }

        .calendar-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md);
        }

        .calendar-card:hover::after {
            opacity: 1;
        }

        .calendar-date {
            font-size: 26px;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.1;
            margin-bottom: 4px;
        }

        .calendar-month {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .calendar-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .calendar-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 优惠阶梯 ===== */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
            margin-top: 20px;
        }

        .tier-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 22px;
            text-align: center;
            transition: all var(--transition-medium);
            position: relative;
        }

        .tier-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .tier-card.featured {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 24px rgba(0, 217, 166, 0.15);
            background: var(--bg-card-light);
        }

        .tier-card.featured::before {
            content: '限时推荐';
            position: absolute;
            top: -10px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent-orange);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 3px 14px;
            border-radius: 999px;
            letter-spacing: 0.5px;
        }

        .tier-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 6px;
            letter-spacing: 0.5px;
        }

        .tier-value {
            font-size: 32px;
            font-weight: 900;
            color: var(--text-primary);
            line-height: 1.1;
            margin-bottom: 4px;
        }

        .tier-value .cur {
            font-size: 18px;
            font-weight: 600;
            color: var(--accent-orange);
        }

        .tier-desc {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 14px;
            line-height: 1.6;
        }

        .tier-limit {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        /* ===== 热门专题 / 卖点三连 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition-medium);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple));
            opacity: 0;
            transition: opacity var(--transition-fast);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 14px;
            background: var(--bg-card-light);
            color: var(--accent-cyan);
            border: 1px solid var(--border-color);
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ===== 数据看板 ===== */
        .stats-dashboard {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 32px;
            align-items: center;
        }

        .stats-numbers-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .stat-box {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            text-align: center;
            transition: all var(--transition-medium);
        }

        .stat-box:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .stat-box .num {
            font-size: 34px;
            font-weight: 900;
            color: var(--accent-cyan);
            line-height: 1.15;
        }

        .stat-box .num.orange {
            color: var(--accent-orange);
        }

        .stat-box .num.purple {
            color: var(--accent-purple);
        }

        .stat-box .label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .dashboard-content {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 26px;
        }

        .dashboard-content h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

        .dashboard-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ===== 资讯区 ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 32px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-item {
            display: flex;
            gap: 18px;
            padding: 20px 16px;
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition-fast);
            align-items: flex-start;
            border-radius: var(--radius-sm);
        }

        .news-item:hover {
            background: var(--bg-card-light);
        }

        .news-date-block {
            flex-shrink: 0;
            text-align: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 8px 10px;
            min-width: 56px;
        }

        .news-date-block .day {
            font-size: 22px;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.1;
        }

        .news-date-block .month {
            font-size: 11px;
            color: var(--text-muted);
            letter-spacing: 1px;
        }

        .news-content {
            flex: 1;
        }

        .news-content h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .news-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 8px;
        }

        .news-link {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: color var(--transition-fast);
        }

        .news-link i {
            font-size: 12px;
            transition: transform var(--transition-fast);
        }

        .news-link:hover {
            color: var(--accent-orange);
        }

        .news-link:hover i {
            transform: translateX(4px);
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .news-sidebar-box {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
        }

        .news-sidebar-box h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border-color);
        }

        .sidebar-news-link {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            transition: color var(--transition-fast);
        }

        .sidebar-news-link:hover {
            color: var(--accent-cyan);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-item {
            font-size: 12px;
            padding: 5px 12px;
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            border-radius: 999px;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .tag-item:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.06);
        }

        /* ===== 使用指南 / FAQ ===== */
        .guide-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .guide-steps {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .guide-step {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            transition: all var(--transition-medium);
        }

        .guide-step:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }

        .step-number {
            width: 38px;
            height: 38px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--accent-cyan);
            color: #0D0F14;
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .guide-step h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-primary);
        }

        .guide-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .faq-container {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item.active {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 217, 166, 0.1);
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 18px;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: color var(--transition-fast);
            text-align: left;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-toggle {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--bg-card-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
        }

        .faq-item.active .faq-toggle {
            background: var(--accent-cyan);
            color: #0D0F14;
            transform: rotate(45deg);
        }

        .faq-answer {
            display: none;
            padding: 0 18px 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            border-left: 3px solid var(--accent-cyan);
            margin-left: 18px;
            padding-left: 14px;
        }

        .faq-item.active .faq-answer {
            display: block;
            animation: fade-in 0.3s ease;
        }

        @keyframes fade-in {
            from { opacity: 0; transform: translateY(-6px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* ===== 深度内容 ===== */
        .deep-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: start;
        }

        .deep-content.image-first {
            grid-template-columns: 0.9fr 1.1fr;
        }

        .deep-image-wrapper {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .deep-image-wrapper img {
            width: 100%;
            height: 100%;
            min-height: 320px;
            object-fit: cover;
        }

        .deep-image-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px;
            background: linear-gradient(to top, rgba(13, 15, 20, 0.9), transparent);
            font-size: 13px;
            color: var(--text-secondary);
        }

        .deep-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
        }

        .deep-text h2 {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .deep-text h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin: 20px 0 10px;
        }

        .deep-text p {
            margin-bottom: 14px;
        }

        .deep-text blockquote {
            border-left: 3px solid var(--accent-orange);
            padding-left: 16px;
            margin: 16px 0;
            font-style: italic;
            color: var(--text-primary);
            font-size: 15px;
        }

        /* ===== 品牌介绍宽幅区块 ===== */
        .brand-banner {
            background: linear-gradient(135deg, var(--bg-card-light) 0%, var(--bg-card) 50%, var(--bg-card-light) 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            position: relative;
            overflow: hidden;
        }

        .brand-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 217, 166, 0.08) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

        .brand-banner h2 {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .brand-banner p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 800px;
        }

        /* ===== 底部固定转化条 ===== */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background: rgba(13, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--border-color);
            z-index: 90;
            display: flex;
            align-items: center;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.35);
        }

        .sticky-cta-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
        }

        .sticky-cta-text {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .sticky-cta-text .highlight {
            color: var(--accent-cyan);
            font-weight: 800;
        }

        .sticky-cta-btn {
            flex-shrink: 0;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 32px;
        }

        .footer-brand-name {
            font-size: 26px;
            font-weight: 900;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .footer-brand-name .accent {
            color: var(--accent-cyan);
        }

        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-form {
            display: flex;
            gap: 8px;
            margin-bottom: 10px;
        }

        .footer-form input {
            flex: 1;
            padding: 10px 14px;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 14px;
            font-family: var(--font-sans);
            transition: border-color var(--transition-fast);
        }

        .footer-form input:focus {
            outline: none;
            border-color: var(--accent-cyan);
            box-shadow: 0 0 8px rgba(0, 217, 166, 0.15);
        }

        .footer-form button {
            flex-shrink: 0;
            padding: 10px 16px;
            background: var(--accent-cyan);
            color: #0D0F14;
            border: none;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 700;
            cursor: pointer;
            font-family: var(--font-sans);
            transition: all var(--transition-fast);
        }

        .footer-form button:hover {
            background: var(--accent-orange);
            color: #fff;
        }

        .footer-bottom {
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
            font-size: 13px;
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 响应式设计 ===== */
        @media screen and (max-width: 1024px) {
            .hero-section .container {
                grid-template-columns: 1fr;
                gap: 28px;
                text-align: center;
            }

            .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }

            .hero-cta-row {
                justify-content: center;
            }

            .hero-stats-row {
                justify-content: center;
            }

            .hero-stat-item {
                text-align: center;
            }

            .hero-right-panel {
                max-width: 420px;
                margin: 0 auto;
                width: 100%;
            }

            .hero-explosion {
                top: -8px;
                right: 20px;
            }

            .calendar-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-dashboard {
                grid-template-columns: 1fr;
            }

            .news-layout {
                grid-template-columns: 1fr;
            }

            .guide-layout {
                grid-template-columns: 1fr;
            }

            .deep-content,
            .deep-content.image-first {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media screen and (max-width: 768px) {
            :root {
                --header-height: 66px;
                --sticky-bar-height: 56px;
            }

            .nav-links-desktop {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-logo {
                font-size: 26px;
            }

            .nav-divider {
                height: 24px;
            }

            .hero-section {
                padding: 48px 0 64px;
                min-height: auto;
            }

            .hero-title {
                font-size: 28px;
            }

            .hero-subtitle {
                font-size: 15px;
            }

            .hero-cta-row {
                flex-direction: column;
                gap: 10px;
                align-items: center;
            }

            .hero-cta-row .btn {
                width: 100%;
                max-width: 300px;
            }

            .hero-stats-row {
                gap: 18px;
            }

            .hero-stat-number {
                font-size: 20px;
            }

            .section-block {
                padding: 48px 0;
            }

            .section-header {
                margin-bottom: 28px;
            }

            .section-title {
                font-size: 24px;
            }

            .calendar-grid {
                grid-template-columns: 1fr;
            }

            .tier-grid {
                grid-template-columns: 1fr;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }

            .stats-numbers-grid {
                grid-template-columns: 1fr;
            }

            .news-item {
                flex-direction: column;
                gap: 10px;
            }

            .news-date-block {
                display: inline-flex;
                gap: 6px;
                align-items: baseline;
                padding: 4px 10px;
                min-width: auto;
            }

            .news-date-block .day {
                font-size: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }

            .sticky-cta-bar .container {
                flex-direction: column;
                justify-content: center;
                gap: 4px;
                padding: 0 12px;
            }

            .sticky-cta-text {
                font-size: 13px;
            }

            .sticky-cta-btn .btn {
                padding: 6px 16px;
                font-size: 13px;
            }

            .hero-explosion {
                width: 56px;
                height: 56px;
                font-size: 9px;
                right: 10px;
            }
        }

        @media screen and (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero-title {
                font-size: 24px;
            }

            .hero-badge {
                font-size: 11px;
                padding: 4px 10px;
            }

            .btn {
                padding: 11px 20px;
                font-size: 14px;
            }

            .stat-box .num {
                font-size: 26px;
            }

            .section-title {
                font-size: 21px;
            }

            .tier-card {
                padding: 18px 16px;
            }

            .tier-value {
                font-size: 26px;
            }

            .deep-image-wrapper img {
                min-height: 220px;
            }

            .brand-banner {
                padding: 24px 18px;
            }

            .hero-promo-card {
                padding: 18px 16px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0D0F14;
            --bg-card: #14171E;
            --bg-card-light: #1A1D24;
            --bg-elevated: #1E2129;
            --text-primary: #F5F1EA;
            --text-secondary: #B8B2AA;
            --text-muted: #7A7670;
            --accent-cyan: #00D9A6;
            --accent-cyan-glow: rgba(0, 217, 166, 0.25);
            --accent-orange: #FF6B3D;
            --accent-orange-glow: rgba(255, 107, 61, 0.22);
            --accent-purple: #7A4DFF;
            --accent-purple-glow: rgba(122, 77, 255, 0.2);
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 217, 166, 0.45);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition-fast: 0.2s ease;
            --transition-medium: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 66px;
            --sticky-bar-height: 56px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            overflow-x: hidden;
            padding-bottom: var(--sticky-bar-height);
            position: relative;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover,
        a:focus {
            color: var(--accent-orange);
            outline: none;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        button {
            font-family: var(--font-sans);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 顶部导航栏 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }

        .nav-logo-area {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .nav-logo {
            font-size: 32px;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            line-height: 1;
            white-space: nowrap;
        }

        .nav-logo .logo-accent {
            color: var(--accent-cyan);
        }

        .nav-divider {
            width: 1px;
            height: 32px;
            background: var(--border-color);
            flex-shrink: 0;
        }

        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            justify-content: flex-end;
        }

        .nav-links-desktop a {
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 13px;
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .nav-links-desktop a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.06);
        }

        .nav-links-desktop a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 13px;
            right: 13px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--accent-cyan-glow);
        }

        .nav-toggle {
            display: none;
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            font-size: 20px;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast), border-color var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            background: var(--bg-elevated);
            border-color: var(--accent-cyan);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(13, 15, 20, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 99;
            padding: 24px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-nav.open {
            display: flex;
        }

        .mobile-nav a {
            color: var(--text-secondary);
            font-size: 18px;
            font-weight: 500;
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            border-bottom: 1px solid var(--border-color);
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.06);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 0;
            font-size: 14px;
            color: var(--text-muted);
        }

        .breadcrumb-bar a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb-bar a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb-bar span.sep {
            margin: 0 10px;
            color: var(--border-color);
        }

        .breadcrumb-bar .current {
            color: var(--accent-cyan);
            font-weight: 500;
        }

        /* ===== 分类 Hero ===== */
        .category-hero {
            padding: 72px 0 56px;
            background: radial-gradient(ellipse at 30% 20%, rgba(0, 217, 166, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 75% 65%, rgba(122, 77, 255, 0.06) 0%, transparent 50%),
                var(--bg-primary);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 26px 26px;
            pointer-events: none;
        }

        .category-hero .container {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .category-hero-content h1 {
            font-size: 46px;
            font-weight: 900;
            letter-spacing: -1px;
            line-height: 1.25;
            margin-bottom: 20px;
            color: var(--text-primary);
        }

        .category-hero-content h1 .highlight {
            color: var(--accent-cyan);
            text-shadow: 0 0 30px var(--accent-cyan-glow);
        }

        .category-hero-content .hero-sub {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 16px;
            cursor: pointer;
            transition: all var(--transition-medium);
            border: none;
            text-decoration: none;
            line-height: 1;
        }

        .btn-primary {
            background: var(--accent-cyan);
            color: #0D0F14;
            box-shadow: 0 4px 16px var(--accent-cyan-glow);
        }

        .btn-primary:hover {
            background: var(--accent-orange);
            color: #0D0F14;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px var(--accent-orange-glow);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }

        .btn-secondary:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.08);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 10px 18px;
            font-size: 14px;
            border-radius: var(--radius-sm);
        }

        .category-hero-visual {
            position: relative;
        }

        .category-hero-visual .hero-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
            aspect-ratio: 16/10;
        }

        .category-hero-visual .hero-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
        }

        .hero-stat .stat-number {
            font-size: 36px;
            font-weight: 900;
            color: var(--accent-cyan);
            letter-spacing: -0.5px;
            line-height: 1.1;
        }

        .hero-stat .stat-label {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== 特色长文区域 ===== */
        .featured-article {
            padding: 72px 0;
            background: var(--bg-primary);
        }

        .featured-article .container {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 56px;
            align-items: start;
        }

        .featured-article-content h2 {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 8px;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .featured-article-content .article-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .featured-article-content .article-meta .tag {
            background: rgba(0, 217, 166, 0.1);
            color: var(--accent-cyan);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 500;
            font-size: 12px;
            border: 1px solid rgba(0, 217, 166, 0.2);
        }

        .featured-article-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 18px;
        }

        .featured-article-content h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 32px 0 14px;
        }

        .featured-article-content ul {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }

        .featured-article-content ul li {
            position: relative;
            padding-left: 28px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 10px;
        }

        .featured-article-content ul li::before {
            content: '◆';
            position: absolute;
            left: 0;
            color: var(--accent-cyan);
            font-size: 12px;
            top: 2px;
        }

        .featured-article-side {
            position: sticky;
            top: calc(var(--header-height) + 24px);
        }

        .featured-article-side .side-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            margin-bottom: 24px;
        }

        .featured-article-side .side-img-wrap img {
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/10;
        }

        .side-highlight-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
        }

        .side-highlight-card h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .side-highlight-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 文章列表区 ===== */
        .article-list-section {
            padding: 64px 0 72px;
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 16px;
        }

        .section-heading h2 {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 0;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .section-heading .section-sub {
            font-size: 15px;
            color: var(--text-muted);
        }

        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .article-card {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-medium);
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md);
        }

        .article-card .card-img-wrap {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-elevated);
        }

        .article-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-medium);
        }

        .article-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .article-card .card-body {
            padding: 22px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.08);
            border: 1px solid rgba(0, 217, 166, 0.18);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
            align-self: flex-start;
        }

        .article-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 12px;
            letter-spacing: -0.2px;
        }

        .article-card .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 18px;
            flex: 1;
        }

        .article-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }

        .article-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 14px;
            transition: color var(--transition-fast);
            text-decoration: none;
        }

        .article-card .read-more:hover {
            color: var(--accent-orange);
        }

        .article-card .read-more i {
            transition: transform var(--transition-fast);
        }

        .article-card .read-more:hover i {
            transform: translateX(4px);
            color: var(--accent-orange);
        }

        /* ===== 数据统计板块 ===== */
        .stats-section {
            padding: 64px 0;
            background: var(--bg-primary);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-block {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-medium);
        }

        .stat-block:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .stat-block .stat-value {
            font-size: 40px;
            font-weight: 900;
            color: var(--accent-cyan);
            letter-spacing: -1px;
            line-height: 1.2;
            display: block;
        }

        .stat-block .stat-name {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 8px;
        }

        /* ===== FAQ 区域 ===== */
        .faq-section {
            padding: 64px 0 72px;
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(0, 217, 166, 0.25);
        }

        .faq-item.open {
            border-left: 3px solid var(--accent-cyan);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
            gap: 16px;
        }

        .faq-question h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0;
            line-height: 1.5;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
        }

        .faq-item.open .faq-icon {
            background: var(--accent-cyan);
            color: #0D0F14;
            border-color: var(--accent-cyan);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-medium), padding var(--transition-medium);
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ===== CTA 区域 ===== */
        .cta-section {
            padding: 80px 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(0, 217, 166, 0.06) 0%, transparent 60%),
                var(--bg-primary);
            text-align: center;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 900;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .cta-section p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 580px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .cta-section .btn {
            font-size: 17px;
            padding: 16px 36px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand-name {
            font-size: 28px;
            font-weight: 900;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }

        .footer-brand-name .accent {
            color: var(--accent-cyan);
        }

        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.2px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 14px;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-form {
            display: flex;
            gap: 8px;
        }

        .footer-form input {
            flex: 1;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            color: var(--text-primary);
            font-size: 14px;
            font-family: var(--font-sans);
            outline: none;
            transition: border-color var(--transition-fast);
            min-width: 0;
        }

        .footer-form input:focus {
            border-color: var(--accent-cyan);
        }

        .footer-form button {
            background: var(--accent-cyan);
            color: #0D0F14;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 18px;
            font-weight: 700;
            font-size: 14px;
            cursor: pointer;
            transition: background var(--transition-fast);
            font-family: var(--font-sans);
            white-space: nowrap;
        }

        .footer-form button:hover {
            background: var(--accent-orange);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-bottom-links a {
            color: var(--text-muted);
            font-size: 13px;
            transition: color var(--transition-fast);
        }

        .footer-bottom-links a:hover {
            color: var(--accent-cyan);
        }

        /* ===== 底部固定转化条 ===== */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background: rgba(13, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            z-index: 90;
        }

        .sticky-cta-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }

        .sticky-cta-bar .sticky-text {
            font-size: 15px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .sticky-cta-bar .sticky-text strong {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .sticky-cta-bar .btn {
            padding: 10px 20px;
            font-size: 14px;
            border-radius: var(--radius-sm);
            white-space: nowrap;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }

            .category-hero .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .category-hero-content h1 {
                font-size: 38px;
            }

            .featured-article .container {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .featured-article-side {
                position: static;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --sticky-bar-height: 56px;
            }

            .nav-links-desktop {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-logo {
                font-size: 26px;
            }

            .nav-divider {
                height: 26px;
            }

            .category-hero {
                padding: 48px 0 40px;
            }

            .category-hero-content h1 {
                font-size: 30px;
            }

            .category-hero-content .hero-sub {
                font-size: 16px;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-stat .stat-number {
                font-size: 28px;
            }

            .article-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .stat-block .stat-value {
                font-size: 32px;
            }

            .section-heading h2 {
                font-size: 26px;
            }

            .featured-article-content h2 {
                font-size: 26px;
            }

            .cta-section h2 {
                font-size: 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .sticky-cta-bar .sticky-text {
                font-size: 13px;
            }

            .sticky-cta-bar .btn {
                padding: 8px 14px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .category-hero-content h1 {
                font-size: 26px;
            }

            .hero-cta-group {
                flex-direction: column;
                gap: 10px;
            }

            .btn {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                font-size: 15px;
            }

            .hero-stats {
                gap: 16px;
            }

            .article-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-block {
                padding: 20px 16px;
            }

            .stat-block .stat-value {
                font-size: 28px;
            }

            .section-heading {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .featured-article-content h2 {
                font-size: 22px;
            }

            .featured-article-content h3 {
                font-size: 19px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .sticky-cta-bar .sticky-text {
                font-size: 12px;
            }

            .sticky-cta-bar .btn {
                padding: 8px 12px;
                font-size: 12px;
            }
        }

/* roulang page: category1 */
:root {
    --bg-primary: #0D0F14;
    --bg-card: #14171E;
    --bg-card-light: #1A1D24;
    --bg-elevated: #1E2129;
    --text-primary: #F5F1EA;
    --text-secondary: #B8B2AA;
    --text-muted: #7A7670;
    --accent-cyan: #00D9A6;
    --accent-cyan-glow: rgba(0, 217, 166, 0.25);
    --accent-orange: #FF6B3D;
    --accent-orange-glow: rgba(255, 107, 61, 0.22);
    --accent-purple: #7A4DFF;
    --accent-purple-glow: rgba(122, 77, 255, 0.2);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(0, 217, 166, 0.45);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
    --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --transition-fast: 0.2s ease;
    --transition-medium: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --container-max: 1200px;
    --header-height: 66px;
    --sticky-bar-height: 56px;
}
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 16px;
    overflow-x: hidden;
    padding-bottom: var(--sticky-bar-height);
    position: relative;
    margin: 0;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover, a:focus {
    color: var(--accent-orange);
    outline: none;
}
a:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 3px;
}
button {
    font-family: var(--font-sans);
}
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}
/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 15, 20, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    display: flex;
    align-items: center;
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 16px;
}
.nav-logo-area {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}
.nav-logo {
    font-size: 30px;
    font-weight: 900;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    line-height: 1;
    white-space: nowrap;
}
.nav-logo .logo-accent {
    color: var(--accent-cyan);
}
.nav-divider {
    width: 1px;
    height: 30px;
    background: var(--border-color);
    flex-shrink: 0;
}
.nav-links-desktop {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
    justify-content: flex-end;
}
.nav-links-desktop a {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    position: relative;
    white-space: nowrap;
    transition: color var(--transition-fast), background var(--transition-fast);
}
.nav-links-desktop a:hover {
    color: var(--accent-cyan);
    background: rgba(0, 217, 166, 0.06);
}
.nav-links-desktop a.active {
    color: var(--accent-cyan);
    font-weight: 700;
}
.nav-links-desktop a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 12px;
    right: 12px;
    height: 2px;
    background: var(--accent-cyan);
    border-radius: 2px;
    box-shadow: 0 0 12px var(--accent-cyan-glow);
}
.nav-toggle {
    display: none;
    background: var(--bg-card-light);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 20px;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast), border-color var(--transition-fast);
    flex-shrink: 0;
}
.nav-toggle:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-cyan);
}
.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13, 15, 20, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 99;
    padding: 32px 24px;
    flex-direction: column;
    gap: 12px;
    overflow-y: auto;
}
.mobile-nav.open {
    display: flex;
}
.mobile-nav a {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border-bottom: 1px solid var(--border-color);
    transition: color var(--transition-fast), background var(--transition-fast);
}
.mobile-nav a:hover {
    color: var(--accent-cyan);
    background: rgba(0, 217, 166, 0.06);
}
.mobile-nav a.active {
    color: var(--accent-cyan);
    background: rgba(0, 217, 166, 0.08);
    font-weight: 700;
}
/* Hero */
.hero-section {
    position: relative;
    padding: 72px 0 64px;
    background: var(--bg-primary);
    overflow: hidden;
}
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 80% 20%, rgba(0, 217, 166, 0.08) 0%, transparent 55%),
        radial-gradient(ellipse at 15% 75%, rgba(122, 77, 255, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(255, 107, 61, 0.04) 0%, transparent 45%);
    pointer-events: none;
    z-index: 0;
}
.hero-section .container {
    position: relative;
    z-index: 1;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 217, 166, 0.1);
    border: 1px solid rgba(0, 217, 166, 0.25);
    color: var(--accent-cyan);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 50px;
    margin-bottom: 20px;
    letter-spacing: 0.3px;
}
.hero-title {
    font-size: 44px;
    font-weight: 900;
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}
.hero-title .highlight {
    color: var(--accent-cyan);
    position: relative;
}
.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-orange);
    border-radius: 2px;
    opacity: 0.6;
}
.hero-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 28px;
    max-width: 540px;
}
.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}
.hero-image-wrap {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4 / 3;
}
.hero-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.hero-image-wrap:hover img {
    transform: scale(1.03);
}
.hero-image-wrap::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(13, 15, 20, 0.15) 0%, rgba(13, 15, 20, 0.35) 100%);
    pointer-events: none;
}
.hero-score-card {
    position: absolute;
    bottom: 16px;
    left: 16px;
    right: 16px;
    background: rgba(13, 15, 20, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    border: 1px solid var(--border-color);
}
.hero-score-item {
    text-align: center;
    flex: 1;
    min-width: 72px;
}
.hero-score-item .score-num {
    display: block;
    font-size: 22px;
    font-weight: 900;
    color: var(--accent-cyan);
    line-height: 1.2;
}
.hero-score-item .score-label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
}
/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    font-size: 15px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-decoration: none;
    line-height: 1.4;
    letter-spacing: 0.2px;
}
.btn-primary {
    background: var(--accent-cyan);
    color: #0D0F14;
    box-shadow: 0 4px 16px rgba(0, 217, 166, 0.3);
}
.btn-primary:hover {
    background: var(--accent-orange);
    color: #fff;
    box-shadow: 0 6px 24px rgba(255, 107, 61, 0.35);
    transform: translateY(-2px);
}
.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-outline:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(0, 217, 166, 0.06);
}
.btn-sm {
    padding: 8px 18px;
    font-size: 13px;
}
.btn-lg {
    padding: 16px 36px;
    font-size: 17px;
}
/* Data strip */
.data-strip {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}
.data-strip .container {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
}
.data-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 0 16px;
    border-left: 2px solid var(--accent-cyan);
}
.data-item .data-num {
    font-size: 28px;
    font-weight: 900;
    color: var(--accent-cyan);
    line-height: 1.2;
}
.data-item .data-label {
    font-size: 13px;
    color: var(--text-muted);
}
/* Section */
.section {
    padding: 72px 0;
}
.section-alt {
    background: var(--bg-card);
}
.section-header {
    margin-bottom: 48px;
    max-width: 680px;
}
.section-header.center {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}
.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    color: var(--accent-orange);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 10px;
}
.section-title {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 14px;
    letter-spacing: -0.3px;
}
.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}
/* Feature cards */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-medium), border-color var(--transition-fast), box-shadow var(--transition-medium);
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-cyan), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}
.feature-card:hover::before {
    opacity: 1;
}
.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 18px;
    background: rgba(0, 217, 166, 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 217, 166, 0.2);
}
.feature-card:nth-child(2) .feature-icon {
    background: rgba(255, 107, 61, 0.1);
    color: var(--accent-orange);
    border-color: rgba(255, 107, 61, 0.2);
}
.feature-card:nth-child(3) .feature-icon {
    background: rgba(122, 77, 255, 0.1);
    color: var(--accent-purple);
    border-color: rgba(122, 77, 255, 0.2);
}
.feature-card h3 {
    font-size: 21px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}
.feature-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0;
}
/* Deep content */
.deep-content-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    align-items: start;
}
.deep-content-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.9;
}
.deep-content-text h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 28px 0 12px;
}
.deep-content-text p {
    margin-bottom: 16px;
}
.deep-content-text h3:first-child {
    margin-top: 0;
}
.deep-content-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 86px;
}
.deep-content-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 16 / 11;
}
.quote-block {
    background: var(--bg-elevated);
    border-left: 3px solid var(--accent-orange);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 20px 24px;
    margin: 20px 0;
    font-style: italic;
    color: var(--text-primary);
}
/* Review cards */
.review-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.review-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-medium), border-color var(--transition-fast), box-shadow var(--transition-medium);
    display: flex;
    flex-direction: column;
}
.review-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}
.review-card-img {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    position: relative;
}
.review-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.review-card:hover .review-card-img img {
    transform: scale(1.04);
}
.review-card-img .score-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(13, 15, 20, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--accent-cyan);
    font-size: 16px;
    font-weight: 900;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(0, 217, 166, 0.3);
}
.review-card-body {
    padding: 22px 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.review-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}
.review-tag {
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 50px;
    background: rgba(122, 77, 255, 0.12);
    color: var(--accent-purple);
    border: 1px solid rgba(122, 77, 255, 0.2);
}
.review-tag.cyan {
    background: rgba(0, 217, 166, 0.1);
    color: var(--accent-cyan);
    border-color: rgba(0, 217, 166, 0.2);
}
.review-tag.orange {
    background: rgba(255, 107, 61, 0.1);
    color: var(--accent-orange);
    border-color: rgba(255, 107, 61, 0.2);
}
.review-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
    line-height: 1.4;
}
.review-card .review-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}
.review-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 14px;
}
.read-more-link {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent-cyan);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: color var(--transition-fast), gap var(--transition-fast);
}
.read-more-link:hover {
    color: var(--accent-orange);
    gap: 8px;
}
/* Process steps */
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.process-step {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px 22px;
    text-align: center;
    position: relative;
    transition: transform var(--transition-medium), border-color var(--transition-fast);
}
.process-step:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
}
.process-step-num {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(0, 217, 166, 0.12);
    color: var(--accent-cyan);
    font-size: 18px;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    border: 1px solid rgba(0, 217, 166, 0.25);
}
.process-step h4 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.process-step p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    margin: 0;
}
/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-width: 800px;
}
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}
.faq-item.active {
    border-color: var(--border-hover);
}
.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: left;
    transition: color var(--transition-fast);
}
.faq-question:hover {
    color: var(--accent-cyan);
}
.faq-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--bg-elevated);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: transform var(--transition-medium);
}
.faq-item.active .faq-icon {
    transform: rotate(45deg);
    background: rgba(0, 217, 166, 0.15);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 24px;
}
.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 24px 20px;
}
.faq-answer p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0;
}
/* CTA section */
.cta-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(0, 217, 166, 0.08) 0%, transparent 60%);
    pointer-events: none;
}
.cta-section .container {
    position: relative;
    z-index: 1;
}
.cta-section h2 {
    font-size: 30px;
    font-weight: 800;
    margin-bottom: 14px;
}
.cta-section p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 28px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}
/* Footer */
.site-footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 56px 0 32px;
    margin-top: 40px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 0.8fr 1.2fr;
    gap: 36px;
    margin-bottom: 36px;
}
.footer-brand-name {
    font-size: 26px;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 12px;
}
.footer-brand-name .accent {
    color: var(--accent-cyan);
}
.footer-brand-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 0;
}
.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 14px;
    letter-spacing: 0.4px;
}
.footer-col ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
.footer-col ul li {
    margin-bottom: 8px;
}
.footer-col ul a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}
.footer-col ul a:hover {
    color: var(--accent-cyan);
}
.footer-form {
    display: flex;
    gap: 8px;
    margin-top: 6px;
}
.footer-form input {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 14px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    transition: border-color var(--transition-fast);
}
.footer-form input:focus {
    outline: none;
    border-color: var(--accent-cyan);
}
.footer-form input::placeholder {
    color: var(--text-muted);
}
.footer-form button {
    background: var(--accent-cyan);
    color: #0D0F14;
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: background var(--transition-fast);
    font-family: var(--font-sans);
    white-space: nowrap;
}
.footer-form button:hover {
    background: var(--accent-orange);
    color: #fff;
}
.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-muted);
}
.footer-bottom-links {
    display: flex;
    gap: 10px;
    align-items: center;
}
.footer-bottom-links a {
    font-size: 13px;
    color: var(--text-muted);
}
.footer-bottom-links a:hover {
    color: var(--accent-cyan);
}
/* Sticky CTA bar */
.sticky-cta-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--sticky-bar-height);
    background: rgba(13, 15, 20, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-color);
    z-index: 90;
    display: flex;
    align-items: center;
}
.sticky-cta-bar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 16px;
}
.sticky-cta-text {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.sticky-cta-text .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-cyan);
    animation: pulse-dot 1.5s ease infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}
/* Breadcrumb */
.breadcrumb {
    padding: 20px 0 0;
    font-size: 13px;
    color: var(--text-muted);
}
.breadcrumb a {
    color: var(--text-muted);
}
.breadcrumb a:hover {
    color: var(--accent-cyan);
}
.breadcrumb span {
    margin: 0 6px;
}
/* Responsive */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .hero-title {
        font-size: 36px;
    }
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .review-card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .deep-content-grid {
        grid-template-columns: 1fr;
    }
    .deep-content-image {
        position: static;
    }
}
@media (max-width: 768px) {
    .nav-links-desktop {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
    .hero-section {
        padding: 48px 0 40px;
    }
    .section {
        padding: 48px 0;
    }
    .section-title {
        font-size: 28px;
    }
    .hero-title {
        font-size: 30px;
    }
    .hero-score-card {
        flex-wrap: nowrap;
        gap: 6px;
        padding: 10px 12px;
    }
    .hero-score-item .score-num {
        font-size: 17px;
    }
    .hero-score-item .score-label {
        font-size: 10px;
    }
    .data-strip .container {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .data-item {
        border-left: none;
        border-bottom: 1px solid var(--border-color);
        padding: 8px 0;
        flex-direction: row;
        gap: 12px;
        align-items: baseline;
    }
    .data-item .data-num {
        font-size: 20px;
    }
    .sticky-cta-text {
        font-size: 12px;
    }
    .sticky-cta-bar .btn {
        padding: 8px 14px;
        font-size: 12px;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
}
@media (max-width: 520px) {
    .container {
        padding: 0 16px;
    }
    .feature-grid {
        grid-template-columns: 1fr;
    }
    .review-card-grid {
        grid-template-columns: 1fr;
    }
    .process-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero-actions {
        flex-direction: column;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .hero-title {
        font-size: 26px;
    }
    .section-title {
        font-size: 24px;
    }
    .cta-section {
        padding: 32px 20px;
    }
    .cta-section h2 {
        font-size: 24px;
    }
    .footer-form {
        flex-direction: column;
    }
    .footer-form button {
        width: 100%;
    }
    .hero-score-card {
        flex-wrap: wrap;
    }
    .hero-score-item {
        min-width: 60px;
    }
}

/* roulang page: category4 */
:root {
        --bg-primary: #0D0F14;
        --bg-card: #14171E;
        --bg-card-light: #1A1D24;
        --bg-elevated: #1E2129;
        --text-primary: #F5F1EA;
        --text-secondary: #B8B2AA;
        --text-muted: #7A7670;
        --accent-cyan: #00D9A6;
        --accent-cyan-glow: rgba(0, 217, 166, 0.25);
        --accent-orange: #FF6B3D;
        --accent-orange-glow: rgba(255, 107, 61, 0.22);
        --accent-purple: #7A4DFF;
        --accent-purple-glow: rgba(122, 77, 255, 0.2);
        --border-color: rgba(255, 255, 255, 0.08);
        --border-hover: rgba(0, 217, 166, 0.45);
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 18px;
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
        --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
        --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
        --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        --transition-fast: 0.2s ease;
        --transition-medium: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        --container-max: 1200px;
        --header-height: 66px;
        --sticky-bar-height: 56px;
    }

    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    body {
        font-family: var(--font-sans);
        background: var(--bg-primary);
        color: var(--text-primary);
        line-height: 1.8;
        font-size: 16px;
        overflow-x: hidden;
        padding-bottom: var(--sticky-bar-height);
        position: relative;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
    }

    a {
        color: var(--accent-cyan);
        text-decoration: none;
        transition: color var(--transition-fast);
    }

    a:hover,
    a:focus {
        color: var(--accent-orange);
        outline: none;
    }

    a:focus-visible {
        outline: 2px solid var(--accent-cyan);
        outline-offset: 3px;
    }

    button {
        font-family: var(--font-sans);
    }

    .container {
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== 顶部导航栏 ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(13, 15, 20, 0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border-color);
        height: var(--header-height);
        display: flex;
        align-items: center;
    }

    .site-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        gap: 16px;
    }

    .nav-logo-area {
        display: flex;
        align-items: center;
        gap: 14px;
        flex-shrink: 0;
    }

    .nav-logo {
        font-size: 32px;
        font-weight: 900;
        letter-spacing: -0.5px;
        color: var(--text-primary);
        line-height: 1;
        white-space: nowrap;
    }

    .nav-logo .logo-accent {
        color: var(--accent-cyan);
    }

    .nav-divider {
        width: 1px;
        height: 32px;
        background: var(--border-color);
        flex-shrink: 0;
    }

    .nav-links-desktop {
        display: flex;
        align-items: center;
        gap: 4px;
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .nav-links-desktop a {
        color: var(--text-secondary);
        font-size: 14px;
        font-weight: 500;
        padding: 8px 12px;
        border-radius: var(--radius-sm);
        position: relative;
        white-space: nowrap;
        transition: color var(--transition-fast), background var(--transition-fast);
    }

    .nav-links-desktop a:hover {
        color: var(--accent-cyan);
        background: rgba(0, 217, 166, 0.06);
    }

    .nav-links-desktop a.active {
        color: var(--accent-cyan);
        font-weight: 700;
    }

    .nav-links-desktop a.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 12px;
        right: 12px;
        height: 2px;
        background: var(--accent-cyan);
        border-radius: 2px;
        box-shadow: 0 0 12px var(--accent-cyan-glow);
    }

    .nav-toggle {
        display: none;
        background: var(--bg-card-light);
        border: 1px solid var(--border-color);
        color: var(--text-primary);
        width: 44px;
        height: 44px;
        border-radius: var(--radius-sm);
        cursor: pointer;
        font-size: 20px;
        align-items: center;
        justify-content: center;
        transition: background var(--transition-fast), border-color var(--transition-fast);
        flex-shrink: 0;
    }

    .nav-toggle:hover {
        background: var(--bg-elevated);
        border-color: var(--accent-cyan);
    }

    .mobile-nav {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(13, 15, 20, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        z-index: 99;
        padding: 24px 20px;
        flex-direction: column;
        gap: 6px;
        overflow-y: auto;
    }

    .mobile-nav.open {
        display: flex;
    }

    .mobile-nav a {
        color: var(--text-secondary);
        font-size: 18px;
        font-weight: 500;
        padding: 14px 16px;
        border-radius: var(--radius-sm);
        border-bottom: 1px solid var(--border-color);
        transition: color var(--transition-fast), background var(--transition-fast);
    }

    .mobile-nav a:hover,
    .mobile-nav a.active {
        color: var(--accent-cyan);
        background: rgba(0, 217, 166, 0.06);
    }

    /* ===== 面包屑 ===== */
    .breadcrumb-wrap {
        padding: 18px 0 4px;
        font-size: 14px;
        color: var(--text-muted);
    }

    .breadcrumb-wrap a {
        color: var(--text-muted);
        transition: color var(--transition-fast);
    }

    .breadcrumb-wrap a:hover {
        color: var(--accent-cyan);
    }

    .breadcrumb-wrap .sep {
        margin: 0 8px;
        color: var(--text-muted);
    }

    .breadcrumb-wrap .current {
        color: var(--accent-cyan);
        font-weight: 500;
    }

    /* ===== Hero 区域 ===== */
    .hero-category {
        background-image: url('/assets/images/backpic/back-1.webp');
        background-size: cover;
        background-position: center;
        position: relative;
        padding: 70px 0 80px;
        border-radius: 0;
        overflow: hidden;
    }

    .hero-category::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(135deg, rgba(13, 15, 20, 0.88) 0%, rgba(13, 15, 20, 0.68) 50%, rgba(13, 15, 20, 0.4) 100%);
        z-index: 1;
    }

    .hero-category .container {
        position: relative;
        z-index: 2;
    }

    .hero-category .h1-title {
        font-size: 44px;
        font-weight: 900;
        line-height: 1.3;
        color: var(--text-primary);
        margin-bottom: 16px;
        letter-spacing: -0.5px;
    }

    .hero-category .h1-title .accent-text {
        color: var(--accent-cyan);
    }

    .hero-category .h1-title .accent-orange-text {
        color: var(--accent-orange);
    }

    .hero-category .hero-sub {
        font-size: 18px;
        color: var(--text-secondary);
        max-width: 640px;
        line-height: 1.8;
        margin-bottom: 28px;
    }

    .hero-btns {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 24px;
        border-radius: var(--radius-md);
        font-size: 16px;
        font-weight: 700;
        cursor: pointer;
        transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
        border: none;
        line-height: 1.4;
    }

    .btn-primary {
        background: var(--accent-cyan);
        color: #0D0F14;
    }

    .btn-primary:hover {
        background: var(--accent-orange);
        color: #0D0F14;
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    .btn-secondary {
        background: transparent;
        color: var(--text-primary);
        border: 1px solid var(--border-color);
    }

    .btn-secondary:hover {
        background: rgba(0, 217, 166, 0.1);
        border-color: var(--border-hover);
        color: var(--accent-cyan);
        transform: translateY(-2px);
    }

    .hero-stats {
        display: flex;
        gap: 28px;
        margin-top: 32px;
        flex-wrap: wrap;
    }

    .hero-stat-item {
        display: flex;
        flex-direction: column;
        gap: 2px;
    }

    .hero-stat-item .stat-num {
        font-size: 28px;
        font-weight: 900;
        color: var(--accent-cyan);
        line-height: 1.2;
    }

    .hero-stat-item .stat-label {
        font-size: 13px;
        color: var(--text-muted);
    }

    /* ===== 板块通用 ===== */
    .section-block {
        padding: 64px 0;
    }

    .section-block.alt-bg {
        background: var(--bg-card);
    }

    .section-header {
        margin-bottom: 32px;
    }

    .section-header .section-tag {
        display: inline-block;
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 2px;
        text-transform: uppercase;
        color: var(--accent-orange);
        margin-bottom: 8px;
    }

    .section-header h2 {
        font-size: 32px;
        font-weight: 900;
        color: var(--text-primary);
        line-height: 1.3;
        margin-bottom: 10px;
        letter-spacing: -0.3px;
    }

    .section-header p {
        font-size: 16px;
        color: var(--text-secondary);
        max-width: 720px;
    }

    /* ===== 热推活动主卡片 ===== */
    .featured-activities {
        display: grid;
        grid-template-columns: 7fr 5fr;
        gap: 24px;
    }

    .activity-feature-card {
        background: var(--bg-card-light);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        overflow: hidden;
        display: flex;
        flex-direction: column;
        transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-fast);
    }

    .activity-feature-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        border-color: var(--border-hover);
    }

    .activity-feature-card .card-img {
        height: 220px;
        overflow: hidden;
        position: relative;
    }

    .activity-feature-card .card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform var(--transition-medium);
    }

    .activity-feature-card:hover .card-img img {
        transform: scale(1.05);
    }

    .activity-feature-card .card-badge {
        position: absolute;
        top: 16px;
        left: 16px;
        background: var(--accent-orange);
        color: #0D0F14;
        font-size: 12px;
        font-weight: 700;
        padding: 4px 12px;
        border-radius: 20px;
        letter-spacing: 1px;
    }

    .activity-feature-card .card-badge.cyan {
        background: var(--accent-cyan);
    }

    .activity-feature-card .card-body {
        padding: 22px 24px 24px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .activity-feature-card .card-title {
        font-size: 22px;
        font-weight: 800;
        color: var(--text-primary);
        margin-bottom: 10px;
        line-height: 1.4;
    }

    .activity-feature-card .card-desc {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.8;
        margin-bottom: 16px;
        flex: 1;
    }

    .activity-feature-card .card-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        flex-wrap: wrap;
    }

    .activity-feature-card .card-date {
        font-size: 13px;
        color: var(--text-muted);
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .activity-feature-card .read-more-btn {
        font-size: 14px;
        font-weight: 700;
        color: var(--accent-cyan);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: color var(--transition-fast), gap var(--transition-fast);
    }

    .activity-feature-card .read-more-btn:hover {
        color: var(--accent-orange);
        gap: 10px;
    }

    /* ===== 标准活动卡片 ===== */
    .activity-cards-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }

    .activity-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        overflow: hidden;
        display: flex;
        flex-direction: column;
        transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-fast);
    }

    .activity-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
        border-color: var(--border-hover);
    }

    .activity-card .card-img {
        height: 160px;
        overflow: hidden;
    }

    .activity-card .card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform var(--transition-medium);
    }

    .activity-card:hover .card-img img {
        transform: scale(1.05);
    }

    .activity-card .card-body {
        padding: 18px 20px 20px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .activity-card .card-title {
        font-size: 17px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 8px;
        line-height: 1.4;
    }

    .activity-card .card-desc {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 12px;
        flex: 1;
    }

    .activity-card .card-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        flex-wrap: wrap;
    }

    .activity-card .card-date {
        font-size: 12px;
        color: var(--text-muted);
    }

    .activity-card .read-more-btn {
        font-size: 13px;
        font-weight: 700;
        color: var(--accent-cyan);
        display: inline-flex;
        align-items: center;
        gap: 4px;
        transition: color var(--transition-fast), gap var(--transition-fast);
    }

    .activity-card .read-more-btn:hover {
        color: var(--accent-orange);
        gap: 8px;
    }

    /* ===== 深度内容区 ===== */
    .deep-content-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 36px;
        align-items: center;
    }

    .deep-content-grid .deep-image {
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border-color);
    }

    .deep-content-grid .deep-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .deep-content-grid .deep-text h3 {
        font-size: 26px;
        font-weight: 800;
        color: var(--text-primary);
        margin-bottom: 16px;
        line-height: 1.4;
    }

    .deep-content-grid .deep-text p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.9;
        margin-bottom: 14px;
    }

    .deep-content-grid .deep-text .highlight-box {
        background: var(--bg-card-light);
        border-left: 3px solid var(--accent-cyan);
        padding: 16px 20px;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        font-size: 14px;
        color: var(--text-secondary);
        margin: 16px 0;
        line-height: 1.8;
    }

    /* ===== 参与流程 ===== */
    .steps-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }

    .step-item {
        background: var(--bg-card-light);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 24px 22px;
        text-align: center;
        transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
    }

    .step-item:hover {
        transform: translateY(-3px);
        border-color: var(--border-hover);
        box-shadow: var(--shadow-sm);
    }

    .step-item .step-num {
        font-size: 40px;
        font-weight: 900;
        color: var(--accent-purple);
        line-height: 1;
        margin-bottom: 12px;
        letter-spacing: -1px;
    }

    .step-item .step-title {
        font-size: 17px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 8px;
    }

    .step-item .step-desc {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.7;
    }

    /* ===== 玩家评价/社会认同 ===== */
    .testimonial-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .testimonial-card {
        background: var(--bg-card-light);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 24px;
        transition: transform var(--transition-fast), border-color var(--transition-fast);
    }

    .testimonial-card:hover {
        transform: translateY(-3px);
        border-color: var(--border-hover);
    }

    .testimonial-card .quote-mark {
        font-size: 28px;
        color: var(--accent-cyan);
        line-height: 1;
        margin-bottom: 10px;
    }

    .testimonial-card .quote-text {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.8;
        margin-bottom: 14px;
    }

    .testimonial-card .player-info {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .testimonial-card .player-avatar {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--accent-purple-glow);
        border: 1px solid var(--accent-purple);
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        color: var(--accent-purple);
        font-size: 14px;
        flex-shrink: 0;
    }

    .testimonial-card .player-name {
        font-size: 14px;
        font-weight: 700;
        color: var(--text-primary);
    }

    .testimonial-card .player-title {
        font-size: 12px;
        color: var(--text-muted);
    }

    /* ===== FAQ ===== */
    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .faq-item {
        background: var(--bg-card-light);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: border-color var(--transition-fast);
    }

    .faq-item.open {
        border-color: var(--border-hover);
    }

    .faq-question {
        width: 100%;
        background: none;
        border: none;
        color: var(--text-primary);
        font-size: 16px;
        font-weight: 700;
        padding: 18px 22px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        cursor: pointer;
        text-align: left;
        line-height: 1.5;
        transition: color var(--transition-fast);
    }

    .faq-question:hover {
        color: var(--accent-cyan);
    }

    .faq-question .faq-icon {
        flex-shrink: 0;
        font-size: 18px;
        color: var(--accent-cyan);
        transition: transform var(--transition-fast);
        margin-left: 12px;
    }

    .faq-item.open .faq-question .faq-icon {
        transform: rotate(45deg);
        color: var(--accent-orange);
    }

    .faq-answer {
        display: none;
        padding: 0 22px 18px;
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.9;
    }

    .faq-item.open .faq-answer {
        display: block;
        animation: faqFadeIn 0.3s ease;
    }

    @keyframes faqFadeIn {
        from {
            opacity: 0;
            transform: translateY(-4px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* ===== CTA 区域 ===== */
    .cta-section {
        background: var(--bg-card-light);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 48px 40px;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        top: -40px;
        right: -40px;
        width: 200px;
        height: 200px;
        background: radial-gradient(circle, var(--accent-cyan-glow) 0%, transparent 70%);
        pointer-events: none;
    }

    .cta-section::after {
        content: '';
        position: absolute;
        bottom: -40px;
        left: -40px;
        width: 160px;
        height: 160px;
        background: radial-gradient(circle, var(--accent-orange-glow) 0%, transparent 70%);
        pointer-events: none;
    }

    .cta-section .cta-title {
        font-size: 28px;
        font-weight: 900;
        color: var(--text-primary);
        margin-bottom: 12px;
        position: relative;
        z-index: 1;
    }

    .cta-section .cta-desc {
        font-size: 16px;
        color: var(--text-secondary);
        max-width: 560px;
        margin: 0 auto 24px;
        position: relative;
        z-index: 1;
    }

    .cta-section .btn {
        position: relative;
        z-index: 1;
    }

    /* ===== 底部固定转化条 ===== */
    .sticky-callout {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: var(--sticky-bar-height);
        background: rgba(13, 15, 20, 0.96);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-top: 1px solid var(--border-color);
        z-index: 90;
        display: flex;
        align-items: center;
        box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.4);
    }

    .sticky-callout .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        gap: 16px;
    }

    .sticky-callout .sticky-text {
        font-size: 14px;
        font-weight: 600;
        color: var(--text-primary);
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .sticky-callout .sticky-text .gift-icon {
        color: var(--accent-cyan);
        font-size: 16px;
    }

    .sticky-callout .sticky-btn {
        background: var(--accent-cyan);
        color: #0D0F14;
        font-size: 14px;
        font-weight: 700;
        padding: 8px 20px;
        border-radius: var(--radius-sm);
        border: none;
        cursor: pointer;
        white-space: nowrap;
        transition: background var(--transition-fast), transform var(--transition-fast);
    }

    .sticky-callout .sticky-btn:hover {
        background: var(--accent-orange);
        transform: translateY(-2px);
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--bg-card);
        border-top: 1px solid var(--border-color);
        padding: 48px 0 32px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.4fr;
        gap: 32px;
        margin-bottom: 32px;
    }

    .footer-brand-name {
        font-size: 28px;
        font-weight: 900;
        color: var(--text-primary);
        margin-bottom: 12px;
    }

    .footer-brand-name .accent {
        color: var(--accent-cyan);
    }

    .footer-brand-desc {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.8;
        max-width: 320px;
    }

    .footer-col h4 {
        font-size: 15px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 14px;
    }

    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .footer-col ul li a {
        font-size: 14px;
        color: var(--text-muted);
        transition: color var(--transition-fast);
    }

    .footer-col ul li a:hover {
        color: var(--accent-cyan);
    }

    .footer-form {
        display: flex;
        gap: 8px;
        margin-bottom: 8px;
    }

    .footer-form input {
        flex: 1;
        background: var(--bg-card-light);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-sm);
        padding: 10px 14px;
        color: var(--text-primary);
        font-size: 14px;
        min-width: 0;
        transition: border-color var(--transition-fast);
    }

    .footer-form input:focus {
        border-color: var(--accent-cyan);
        outline: none;
    }

    .footer-form input::placeholder {
        color: var(--text-muted);
    }

    .footer-form button {
        background: var(--accent-cyan);
        color: #0D0F14;
        font-weight: 700;
        font-size: 14px;
        padding: 10px 16px;
        border-radius: var(--radius-sm);
        border: none;
        cursor: pointer;
        white-space: nowrap;
        transition: background var(--transition-fast);
    }

    .footer-form button:hover {
        background: var(--accent-orange);
    }

    .footer-bottom {
        border-top: 1px solid var(--border-color);
        padding-top: 20px;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
    }

    .footer-bottom span {
        font-size: 13px;
        color: var(--text-muted);
    }

    .footer-bottom-links {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
    }

    .footer-bottom-links a {
        color: var(--text-muted);
        transition: color var(--transition-fast);
    }

    .footer-bottom-links a:hover {
        color: var(--accent-cyan);
    }

    .footer-bottom-links span {
        color: var(--text-muted);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .hero-category .h1-title {
            font-size: 36px;
        }
        .activity-cards-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .featured-activities {
            grid-template-columns: 1fr;
        }
        .deep-content-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .steps-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .testimonial-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
    }

    @media (max-width: 768px) {
        .nay-links-desktop {
            display: none;
        }
        .nav-links-desktop {
            display: none;
        }
        .nav-toggle {
            display: inline-flex;
        }
        .nav-logo {
            font-size: 26px;
        }
        .nav-logo-area {
            gap: 10px;
        }
        .nav-divider {
            height: 24px;
        }
        .hero-category {
            padding: 48px 0 56px;
        }
        .hero-category .h1-title {
            font-size: 30px;
        }
        .hero-category .hero-sub {
            font-size: 16px;
        }
        .section-block {
            padding: 48px 0;
        }
        .section-header h2 {
            font-size: 26px;
        }
        .activity-cards-grid {
            grid-template-columns: 1fr;
        }
        .steps-grid {
            grid-template-columns: 1fr;
        }
        .testimonial-grid {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .sticky-callout .sticky-text {
            font-size: 12px;
        }
        .sticky-callout .sticky-btn {
            font-size: 12px;
            padding: 6px 14px;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }
        .hero-category .h1-title {
            font-size: 26px;
        }
        .hero-btns {
            flex-direction: column;
            width: 100%;
        }
        .hero-btns .btn {
            width: 100%;
            justify-content: center;
        }
        .hero-stats {
            gap: 16px;
        }
        .hero-stat-item .stat-num {
            font-size: 22px;
        }
        .section-header h2 {
            font-size: 22px;
        }
        .cta-section {
            padding: 32px 20px;
        }
        .cta-section .cta-title {
            font-size: 22px;
        }
        .cta-section .cta-desc {
            font-size: 14px;
        }
        .sticky-callout .sticky-text {
            font-size: 11px;
            gap: 6px;
        }
        .activity-feature-card .card-body {
            padding: 16px 18px 18px;
        }
        .activity-feature-card .card-title {
            font-size: 18px;
        }
        .deep-content-grid .deep-text h3 {
            font-size: 20px;
        }
    }

/* roulang page: category3 */
:root {
            --bg-primary: #0D0F14;
            --bg-card: #14171E;
            --bg-card-light: #1A1D24;
            --bg-elevated: #1E2129;
            --text-primary: #F5F1EA;
            --text-secondary: #B8B2AA;
            --text-muted: #7A7670;
            --accent-cyan: #00D9A6;
            --accent-cyan-glow: rgba(0, 217, 166, 0.25);
            --accent-orange: #FF6B3D;
            --accent-orange-glow: rgba(255, 107, 61, 0.22);
            --accent-purple: #7A4DFF;
            --accent-purple-glow: rgba(122, 77, 255, 0.2);
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 217, 166, 0.45);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition-fast: 0.2s ease;
            --transition-medium: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 66px;
            --sticky-bar-height: 56px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            overflow-x: hidden;
            padding-bottom: var(--sticky-bar-height);
            position: relative;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover,
        a:focus {
            color: var(--accent-orange);
            outline: none;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 顶部导航栏 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }

        .nav-logo-area {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .nav-logo {
            font-size: 32px;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            line-height: 1;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .nav-logo:hover {
            color: var(--accent-cyan);
        }

        .nav-logo .logo-accent {
            color: var(--accent-cyan);
        }

        .nav-divider {
            width: 1px;
            height: 32px;
            background: var(--border-color);
            flex-shrink: 0;
        }

        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
            justify-content: flex-end;
        }

        .nav-links-desktop a {
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .nav-links-desktop a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.06);
        }

        .nav-links-desktop a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 12px;
            right: 12px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--accent-cyan-glow);
        }

        .nav-toggle {
            display: none;
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            font-size: 20px;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast), border-color var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            background: var(--bg-elevated);
            border-color: var(--accent-cyan);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(13, 15, 20, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 99;
            padding: 24px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }

        .mobile-nav.open {
            display: flex;
        }

        .mobile-nav a {
            color: var(--text-primary);
            font-size: 18px;
            font-weight: 600;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
        }

        .mobile-nav a:hover {
            background: rgba(0, 217, 166, 0.08);
            border-color: var(--border-hover);
            color: var(--accent-cyan);
        }

        .mobile-nav a.active {
            color: var(--accent-cyan);
            font-weight: 700;
            background: rgba(0, 217, 166, 0.08);
            border-color: var(--border-hover);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-section {
            padding: 36px 0 24px;
            border-bottom: 1px solid var(--border-color);
            background: rgba(13, 15, 20, 0.6);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb .separator {
            color: var(--text-muted);
            opacity: 0.6;
        }

        .breadcrumb .current {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        /* ===== 分类标题区 ===== */
        .category-header {
            padding: 48px 0 40px;
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .category-header::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, var(--accent-cyan-glow) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .category-header::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, var(--accent-purple-glow) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .category-header .container {
            position: relative;
            z-index: 1;
        }

        .category-header h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .category-header h1 .accent-text {
            color: var(--accent-cyan);
            position: relative;
        }

        .category-header h1 .accent-text::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 20px var(--accent-cyan-glow);
        }

        .category-intro {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.9;
            max-width: 780px;
            margin-top: 20px;
        }

        .category-meta-bar {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 24px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .category-meta-bar span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .category-meta-bar i {
            color: var(--accent-cyan);
            font-size: 14px;
        }

        /* ===== 主内容区布局 ===== */
        .main-content-area {
            padding: 48px 0 72px;
            background: var(--bg-primary);
        }

        .content-grid {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 40px;
            align-items: start;
        }

        /* ===== 文章列表 ===== */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .article-card {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-medium), transform var(--transition-medium), border-color var(--transition-medium);
        }

        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-hover);
        }

        .article-card-image {
            position: relative;
            min-height: 200px;
            overflow: hidden;
            background: var(--bg-card-light);
        }

        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-medium);
        }

        .article-card:hover .article-card-image img {
            transform: scale(1.05);
        }

        .article-card-body {
            padding: 24px 24px 24px 8px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 10px;
        }

        .article-card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

        .article-card-tag i {
            font-size: 11px;
        }

        .article-card-title {
            font-size: 22px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }

        .article-card-title a {
            color: inherit;
        }

        .article-card-title a:hover {
            color: var(--accent-cyan);
        }

        .article-card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 4px;
        }

        .article-card-date {
            font-size: 13px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-card-date i {
            color: var(--accent-orange);
            font-size: 12px;
        }

        .read-more-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: transparent;
            border: none;
            padding: 6px 0;
            cursor: pointer;
            transition: color var(--transition-fast), gap var(--transition-fast);
        }

        .read-more-btn i {
            font-size: 12px;
            transition: transform var(--transition-fast);
        }

        .read-more-btn:hover {
            color: var(--accent-orange);
            gap: 10px;
        }

        .read-more-btn:hover i {
            transform: translateX(3px);
        }

        /* ===== 侧边栏 ===== */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
            position: sticky;
            top: calc(var(--header-height) + 24px);
        }

        .sidebar-widget {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 24px;
            box-shadow: var(--shadow-sm);
        }

        .sidebar-widget h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--accent-cyan);
            position: relative;
            display: inline-block;
        }

        .sidebar-widget h3::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 50%;
            height: 2px;
            background: var(--accent-orange);
            border-radius: 1px;
        }

        .hot-article-item {
            display: flex;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition-fast);
        }

        .hot-article-item:last-child {
            border-bottom: none;
        }

        .hot-article-item:hover {
            background: rgba(0, 217, 166, 0.04);
            border-radius: var(--radius-sm);
        }

        .hot-article-img {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-card-light);
        }

        .hot-article-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hot-article-info {
            flex: 1;
            min-width: 0;
        }

        .hot-article-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .hot-article-title a {
            color: inherit;
        }

        .hot-article-title a:hover {
            color: var(--accent-cyan);
        }

        .hot-article-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-cloud a {
            display: inline-block;
            font-size: 13px;
            color: var(--text-secondary);
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 20px;
            transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
        }

        .tag-cloud a:hover {
            background: rgba(0, 217, 166, 0.1);
            color: var(--accent-cyan);
            border-color: var(--border-hover);
        }

        .sidebar-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-form input {
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-family: var(--font-sans);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            width: 100%;
        }

        .sidebar-form input:focus {
            outline: none;
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px var(--accent-cyan-glow);
        }

        .sidebar-form input::placeholder {
            color: var(--text-muted);
        }

        .sidebar-form button {
            background: var(--accent-cyan);
            color: var(--bg-primary);
            border: none;
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 700;
            cursor: pointer;
            transition: background var(--transition-fast), transform var(--transition-fast);
            width: 100%;
            font-family: var(--font-sans);
        }

        .sidebar-form button:hover {
            background: var(--accent-orange);
            color: var(--text-primary);
            transform: translateY(-2px);
        }

        /* ===== 深度内容区 ===== */
        .deep-content {
            margin-top: 64px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 40px 44px;
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
        }

        .deep-content::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-orange), var(--accent-purple));
            border-radius: 3px 3px 0 0;
        }

        .deep-content h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .deep-content h2 .accent-text {
            color: var(--accent-cyan);
        }

        .deep-content h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 28px 0 12px;
            line-height: 1.5;
        }

        .deep-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 2;
            margin-bottom: 16px;
        }

        .deep-content p strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        .deep-content .highlight-box {
            background: var(--bg-card-light);
            border-left: 4px solid var(--accent-cyan);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 20px 0;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .deep-content .highlight-box strong {
            color: var(--accent-cyan);
        }

        /* ===== FAQ 区域 ===== */
        .faq-section {
            margin-top: 64px;
            padding: 0 0 40px;
        }

        .faq-section h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 8px;
            text-align: center;
        }

        .faq-section .faq-subtitle {
            text-align: center;
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 32px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-sm);
        }

        .faq-item.open {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px var(--accent-cyan-glow);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: background var(--transition-fast);
            user-select: none;
        }

        .faq-question:hover {
            background: rgba(0, 217, 166, 0.04);
        }

        .faq-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            color: var(--accent-cyan);
            font-size: 14px;
            font-weight: 700;
            flex-shrink: 0;
            transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
        }

        .faq-item.open .faq-icon {
            background: var(--accent-cyan);
            color: var(--bg-primary);
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-medium), padding var(--transition-medium);
            padding: 0 24px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA 转化区 ===== */
        .cta-section {
            margin-top: 64px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 48px 44px;
            text-align: center;
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, var(--accent-cyan-glow) 0%, transparent 60%);
            pointer-events: none;
            z-index: 0;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .cta-section h2 .accent-text {
            color: var(--accent-cyan);
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 600px;
            margin: 0 auto 28px;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-cyan);
            color: var(--bg-primary);
            font-size: 16px;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            border: none;
            cursor: pointer;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            font-family: var(--font-sans);
        }

        .btn-primary:hover {
            background: var(--accent-orange);
            color: var(--text-primary);
            transform: translateY(-3px);
            box-shadow: 0 8px 24px var(--accent-orange-glow);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-cyan);
            font-size: 16px;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            border: 2px solid var(--accent-cyan);
            cursor: pointer;
            transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
            font-family: var(--font-sans);
        }

        .btn-secondary:hover {
            background: rgba(0, 217, 166, 0.1);
            border-color: var(--accent-orange);
            color: var(--accent-orange);
            transform: translateY(-3px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 32px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand-name {
            font-size: 26px;
            font-weight: 900;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .footer-brand-name .accent {
            color: var(--accent-cyan);
        }

        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-form input {
            flex: 1;
            min-width: 160px;
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-family: var(--font-sans);
            transition: border-color var(--transition-fast);
        }

        .footer-form input:focus {
            outline: none;
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px var(--accent-cyan-glow);
        }

        .footer-form input::placeholder {
            color: var(--text-muted);
        }

        .footer-form button {
            background: var(--accent-cyan);
            color: var(--bg-primary);
            border: none;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 700;
            cursor: pointer;
            transition: background var(--transition-fast);
            font-family: var(--font-sans);
        }

        .footer-form button:hover {
            background: var(--accent-orange);
            color: var(--text-primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: auto;
        }

        .footer-bottom-links a {
            color: var(--text-muted);
            font-size: 12px;
            transition: color var(--transition-fast);
        }

        .footer-bottom-links a:hover {
            color: var(--accent-cyan);
        }

        /* ===== 底部固定转化条 ===== */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background: rgba(13, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            z-index: 98;
        }

        .sticky-cta-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }

        .sticky-cta-text {
            font-size: 14px;
            color: var(--text-primary);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sticky-cta-text i {
            color: var(--accent-cyan);
            font-size: 16px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.5;
            }
        }

        .sticky-cta-btn {
            background: var(--accent-cyan);
            color: var(--bg-primary);
            font-size: 14px;
            font-weight: 700;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: background var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
            font-family: var(--font-sans);
        }

        .sticky-cta-btn:hover {
            background: var(--accent-orange);
            color: var(--text-primary);
            transform: translateY(-2px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .sidebar-widget:last-child {
                grid-column: 1 / -1;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .article-card {
                grid-template-columns: 220px 1fr;
            }
            .nav-links-desktop a {
                padding: 6px 8px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --sticky-bar-height: 56px;
            }
            .container {
                padding: 0 16px;
            }
            .nav-links-desktop {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-logo {
                font-size: 26px;
            }
            .nav-divider {
                height: 24px;
            }
            .category-header h1 {
                font-size: 32px;
            }
            .article-card {
                grid-template-columns: 1fr;
                gap: 0;
            }
            .article-card-image {
                min-height: 180px;
                max-height: 220px;
            }
            .article-card-body {
                padding: 20px;
            }
            .deep-content {
                padding: 28px 24px;
            }
            .deep-content h2 {
                font-size: 24px;
            }
            .cta-section {
                padding: 32px 24px;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .faq-section h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .footer-bottom-links {
                margin-left: 0;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .sidebar-widget:last-child {
                grid-column: auto;
            }
            .sticky-cta-text {
                font-size: 13px;
            }
            .sticky-cta-btn {
                padding: 8px 16px;
                font-size: 13px;
            }
            .breadcrumb-section {
                padding: 24px 0 16px;
            }
            .category-header {
                padding: 32px 0 28px;
            }
            .main-content-area {
                padding: 32px 0 48px;
            }
        }

        @media (max-width: 520px) {
            .nav-logo {
                font-size: 22px;
            }
            .category-header h1 {
                font-size: 26px;
            }
            .category-intro {
                font-size: 14px;
            }
            .article-card-title {
                font-size: 18px;
            }
            .deep-content {
                padding: 20px 16px;
            }
            .deep-content h2 {
                font-size: 20px;
            }
            .deep-content p {
                font-size: 14px;
            }
            .cta-buttons {
                flex-direction: column;
                gap: 10px;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 16px;
            }
            .category-meta-bar {
                gap: 10px;
                font-size: 12px;
            }
            .sticky-cta-text {
                font-size: 12px;
            }
            .sticky-cta-btn {
                padding: 6px 12px;
                font-size: 12px;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #0D0F14;
            --bg-card: #14171E;
            --bg-card-light: #1A1D24;
            --bg-elevated: #1E2129;
            --text-primary: #F5F1EA;
            --text-secondary: #B8B2AA;
            --text-muted: #7A7670;
            --accent-cyan: #00D9A6;
            --accent-cyan-glow: rgba(0, 217, 166, 0.25);
            --accent-orange: #FF6B3D;
            --accent-orange-glow: rgba(255, 107, 61, 0.22);
            --accent-purple: #7A4DFF;
            --accent-purple-glow: rgba(122, 77, 255, 0.2);
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 217, 166, 0.45);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition-fast: 0.2s ease;
            --transition-medium: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 66px;
            --sticky-bar-height: 56px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            overflow-x: hidden;
            padding-bottom: var(--sticky-bar-height);
            position: relative;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover,
        a:focus {
            color: var(--accent-orange);
            outline: none;
        }
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }
        button {
            font-family: var(--font-sans);
            cursor: pointer;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ===== 顶部导航栏 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }
        .nav-logo-area {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .nav-logo {
            font-size: 32px;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            line-height: 1;
            white-space: nowrap;
        }
        .nav-logo .logo-accent {
            color: var(--accent-cyan);
        }
        .nav-divider {
            width: 1px;
            height: 32px;
            background: var(--border-color);
            flex-shrink: 0;
        }
        .nav-logo-area span:last-child {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
            letter-spacing: 0.8px;
        }
        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
            justify-content: flex-end;
        }
        .nav-links-desktop a {
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
        }
        .nav-links-desktop a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.06);
        }
        .nav-links-desktop a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 10px;
            right: 10px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--accent-cyan-glow);
        }
        .nav-toggle {
            display: none;
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            font-size: 20px;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast), border-color var(--transition-fast);
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            background: var(--bg-elevated);
            border-color: var(--accent-cyan);
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(13, 15, 20, 0.97);
            backdrop-filter: blur(20px);
            z-index: 99;
            padding: 24px;
            flex-direction: column;
            gap: 4px;
            overflow-y: auto;
            border-top: 1px solid var(--border-color);
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            color: var(--text-secondary);
            font-size: 18px;
            font-weight: 500;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            border-bottom: 1px solid var(--border-color);
            transition: color var(--transition-fast), background var(--transition-fast);
        }
        .mobile-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.06);
        }
        .mobile-nav a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }
        /* ===== Hero 区域 ===== */
        .hero-category {
            position: relative;
            padding: 64px 0 72px;
            background: linear-gradient(135deg, #0D0F14 0%, #12151D 40%, #0D0F14 100%);
            overflow: hidden;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 520px;
            height: 520px;
            background: radial-gradient(circle, rgba(0, 217, 166, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -100px;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(122, 77, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-category .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 48px;
            align-items: center;
        }
        .hero-category-content {
            padding-right: 20px;
        }
        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .hero-breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .hero-breadcrumb a:hover {
            color: var(--accent-cyan);
        }
        .hero-breadcrumb .separator {
            color: var(--text-muted);
            font-size: 12px;
        }
        .hero-category-content h1 {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.25;
            margin: 0 0 18px;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .hero-category-content h1 .highlight {
            color: var(--accent-cyan);
        }
        .hero-category-subtitle {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 560px;
        }
        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 700;
            border-radius: var(--radius-md);
            border: 2px solid transparent;
            transition: all var(--transition-fast);
            text-align: center;
            line-height: 1.4;
            min-height: 48px;
        }
        .btn-primary {
            background: var(--accent-cyan);
            color: #0D0F14;
            border-color: var(--accent-cyan);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--accent-orange);
            border-color: var(--accent-orange);
            color: #0D0F14;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px var(--accent-orange-glow);
        }
        .btn-secondary {
            background: transparent;
            color: var(--accent-cyan);
            border-color: var(--accent-cyan);
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            background: rgba(0, 217, 166, 0.1);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }
        .hero-progress-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-md);
        }
        .hero-progress-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-progress-title i {
            color: var(--accent-cyan);
            font-size: 18px;
        }
        .progress-ring-wrap {
            display: flex;
            align-items: center;
            gap: 24px;
            margin-bottom: 18px;
        }
        .progress-ring {
            position: relative;
            width: 110px;
            height: 110px;
            flex-shrink: 0;
        }
        .progress-ring svg {
            width: 100%;
            height: 100%;
            transform: rotate(-90deg);
        }
        .progress-ring .bg-circle {
            fill: none;
            stroke: var(--bg-elevated);
            stroke-width: 10;
        }
        .progress-ring .progress-circle {
            fill: none;
            stroke: var(--accent-cyan);
            stroke-width: 10;
            stroke-linecap: round;
            stroke-dasharray: 251.2;
            stroke-dashoffset: 75.36;
            transition: stroke-dashoffset var(--transition-medium);
        }
        .progress-ring .ring-center {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
        }
        .progress-ring .ring-percent {
            font-size: 24px;
            font-weight: 900;
            color: var(--accent-cyan);
            line-height: 1;
        }
        .progress-ring .ring-label {
            font-size: 11px;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .progress-info {
            flex: 1;
        }
        .progress-info .progress-metric {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
        }
        .progress-info .progress-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .hero-tier-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .hero-tier-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }
        .hero-tier-item:hover {
            border-color: var(--border-hover);
            background: var(--bg-elevated);
        }
        .tier-badge {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .tier-badge.cyan {
            background: rgba(0, 217, 166, 0.15);
            color: var(--accent-cyan);
        }
        .tier-badge.orange {
            background: rgba(255, 107, 61, 0.15);
            color: var(--accent-orange);
        }
        .tier-badge.purple {
            background: rgba(122, 77, 255, 0.15);
            color: var(--accent-purple);
        }
        .tier-info {
            flex: 1;
        }
        .tier-info .tier-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .tier-info .tier-desc {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.5;
        }
        /* ===== 分类简介 ===== */
        .section-category-intro {
            padding: 48px 0 10px;
        }
        .category-intro-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            display: flex;
            gap: 24px;
            align-items: flex-start;
            box-shadow: var(--shadow-sm);
        }
        .category-intro-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(0, 217, 166, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }
        .category-intro-text {
            flex: 1;
        }
        .category-intro-text h2 {
            font-size: 24px;
            font-weight: 800;
            margin: 0 0 8px;
            color: var(--text-primary);
        }
        .category-intro-text p {
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-secondary);
            margin: 0;
        }
        /* ===== 深度内容区 ===== */
        .section-deep-content {
            padding: 54px 0 40px;
        }
        .deep-content-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .deep-content-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            position: relative;
        }
        .deep-content-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }
        .deep-content-image::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, rgba(13, 15, 20, 0.7), transparent);
            pointer-events: none;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        }
        .deep-content-text h2 {
            font-size: 30px;
            font-weight: 800;
            margin: 0 0 14px;
            color: var(--text-primary);
            line-height: 1.3;
        }
        .deep-content-text h2 .highlight {
            color: var(--accent-cyan);
        }
        .deep-content-text p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .deep-content-text p:last-child {
            margin-bottom: 0;
        }
        .deep-content-text .meta-tag {
            display: inline-block;
            background: rgba(122, 77, 255, 0.12);
            color: var(--accent-purple);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 14px;
        }
        /* ===== 文章列表区 ===== */
        .section-articles {
            padding: 44px 0 60px;
        }
        .section-articles .section-heading {
            display: flex;
            align-items: baseline;
            justify-content: space-between;
            margin-bottom: 28px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .section-articles .section-heading h2 {
            font-size: 30px;
            font-weight: 800;
            margin: 0;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .section-articles .section-heading h2 .heading-icon {
            width: 6px;
            height: 28px;
            background: var(--accent-cyan);
            border-radius: 3px;
            display: inline-block;
            flex-shrink: 0;
        }
        .section-articles .section-heading .heading-count {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }
        .articles-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 36px;
            align-items: start;
        }
        .articles-list {
            display: flex;
            flex-direction: column;
            gap: 22px;
        }
        .article-card {
            display: grid;
            grid-template-columns: 220px 1fr;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-hover);
        }
        .article-card-image {
            height: 100%;
            min-height: 160px;
            position: relative;
            overflow: hidden;
        }
        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-medium);
        }
        .article-card:hover .article-card-image img {
            transform: scale(1.03);
        }
        .article-card-image .article-tag {
            position: absolute;
            top: 10px;
            left: 10px;
            background: rgba(13, 15, 20, 0.8);
            color: var(--accent-cyan);
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }
        .article-card-body {
            padding: 18px 20px 18px 4px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .article-card-body .article-date {
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 0.3px;
        }
        .article-card-body h3 {
            font-size: 19px;
            font-weight: 700;
            margin: 0;
            line-height: 1.45;
            color: var(--text-primary);
        }
        .article-card-body h3 a {
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }
        .article-card-body h3 a:hover {
            color: var(--accent-cyan);
        }
        .article-card-body .article-excerpt {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-secondary);
            margin: 0;
            flex: 1;
        }
        .article-read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            transition: gap var(--transition-fast), color var(--transition-fast);
        }
        .article-read-more:hover {
            color: var(--accent-orange);
            gap: 10px;
        }
        /* 侧边栏 */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: calc(var(--header-height) + 24px);
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h4 {
            font-size: 16px;
            font-weight: 700;
            margin: 0 0 14px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h4 i {
            color: var(--accent-cyan);
            font-size: 14px;
        }
        .sidebar-hot-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-hot-list li {
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-hot-list li:last-child {
            padding-bottom: 0;
            border-bottom: none;
        }
        .sidebar-hot-list a {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            line-height: 1.5;
            display: block;
            transition: color var(--transition-fast);
        }
        .sidebar-hot-list a:hover {
            color: var(--accent-cyan);
        }
        .sidebar-hot-list .hot-rank {
            display: inline-block;
            width: 22px;
            height: 22px;
            border-radius: 4px;
            background: var(--bg-elevated);
            text-align: center;
            line-height: 22px;
            font-size: 11px;
            font-weight: 700;
            margin-right: 8px;
            color: var(--text-muted);
        }
        .sidebar-hot-list .hot-rank.top1 {
            background: rgba(255, 107, 61, 0.15);
            color: var(--accent-orange);
        }
        .sidebar-hot-list .hot-rank.top2 {
            background: rgba(0, 217, 166, 0.12);
            color: var(--accent-cyan);
        }
        .sidebar-hot-list .hot-rank.top3 {
            background: rgba(122, 77, 255, 0.15);
            color: var(--accent-purple);
        }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags .tag {
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-elevated);
            padding: 5px 14px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
        }
        .sidebar-tags .tag:hover {
            color: var(--accent-cyan);
            border-color: var(--border-hover);
            background: rgba(0, 217, 166, 0.05);
        }
        .sidebar-form {
            display: flex;
            gap: 8px;
        }
        .sidebar-form input {
            flex: 1;
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            font-size: 13px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            transition: border-color var(--transition-fast);
            font-family: var(--font-sans);
            min-width: 0;
        }
        .sidebar-form input:focus {
            outline: none;
            border-color: var(--accent-cyan);
        }
        .sidebar-form input::placeholder {
            color: var(--text-muted);
        }
        .sidebar-form button {
            background: var(--accent-cyan);
            color: #0D0F14;
            border: none;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 700;
            white-space: nowrap;
            transition: background var(--transition-fast);
        }
        .sidebar-form button:hover {
            background: var(--accent-orange);
        }
        /* ===== FAQ ===== */
        .section-faq {
            padding: 52px 0 60px;
        }
        .section-faq .section-heading h2 {
            font-size: 30px;
            font-weight: 800;
            margin: 0 0 24px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .section-faq .section-heading h2 .heading-icon {
            width: 6px;
            height: 28px;
            background: var(--accent-cyan);
            border-radius: 3px;
            display: inline-block;
            flex-shrink: 0;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 840px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-sm);
        }
        .faq-item.open {
            border-left: 3px solid var(--accent-cyan);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 700;
            padding: 20px 22px;
            text-align: left;
            cursor: pointer;
            font-family: var(--font-sans);
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question .faq-icon {
            font-size: 18px;
            color: var(--accent-cyan);
            flex-shrink: 0;
            transition: transform var(--transition-fast);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-medium);
        }
        .faq-item.open .faq-answer {
            max-height: 600px;
        }
        .faq-answer p {
            padding: 0 22px 20px;
            font-size: 14px;
            line-height: 1.85;
            color: var(--text-secondary);
            margin: 0;
        }
        /* ===== CTA 区域 ===== */
        .section-cta {
            padding: 50px 0 66px;
        }
        .cta-box {
            background: linear-gradient(135deg, rgba(0, 217, 166, 0.06) 0%, rgba(122, 77, 255, 0.05) 100%);
            border: 1px solid var(--border-hover);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            text-align: center;
            box-shadow: var(--shadow-md);
        }
        .cta-box h2 {
            font-size: 28px;
            font-weight: 800;
            margin: 0 0 10px;
            color: var(--text-primary);
        }
        .cta-box p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0 0 24px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
        }
        /* ===== 底部固定转化条 ===== */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background: rgba(13, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            border-top: 1px solid var(--border-color);
            z-index: 80;
            display: flex;
            align-items: center;
            box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.5);
        }
        .sticky-cta-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
        }
        .sticky-cta-text {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .sticky-cta-text strong {
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .sticky-cta-bar .btn {
            padding: 8px 20px;
            font-size: 13px;
            min-height: 38px;
            white-space: nowrap;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 28px;
            margin-bottom: 0;
            box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.3);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 30px;
            margin-bottom: 32px;
        }
        .footer-brand-name {
            font-size: 26px;
            font-weight: 900;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .footer-brand-name .accent {
            color: var(--accent-cyan);
        }
        .footer-brand-desc {
            font-size: 13px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin: 0;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 14px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: var(--accent-cyan);
        }
        .footer-form {
            display: flex;
            gap: 8px;
            margin-bottom: 8px;
        }
        .footer-form input {
            flex: 1;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            font-size: 13px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            transition: border-color var(--transition-fast);
            font-family: var(--font-sans);
            min-width: 0;
        }
        .footer-form input:focus {
            outline: none;
            border-color: var(--accent-cyan);
        }
        .footer-form input::placeholder {
            color: var(--text-muted);
        }
        .footer-form button {
            background: var(--accent-cyan);
            color: #0D0F14;
            border: none;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 700;
            white-space: nowrap;
            transition: background var(--transition-fast);
        }
        .footer-form button:hover {
            background: var(--accent-orange);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 20px;
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
        }
        .footer-bottom-links a {
            font-size: 12px;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-bottom-links a:hover {
            color: var(--accent-cyan);
        }
        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero-category .container {
                grid-template-columns: 1fr 300px;
                gap: 32px;
            }
            .hero-category-content h1 {
                font-size: 34px;
            }
            .articles-layout {
                grid-template-columns: 1fr 280px;
                gap: 28px;
            }
            .article-card {
                grid-template-columns: 180px 1fr;
                gap: 16px;
            }
            .deep-content-grid {
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-links-desktop {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .hero-category {
                padding: 40px 0 48px;
            }
            .hero-category .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-category-content h1 {
                font-size: 28px;
            }
            .hero-progress-panel {
                max-width: 100%;
            }
            .deep-content-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .deep-content-image img {
                height: 280px;
            }
            .articles-layout {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .article-card {
                grid-template-columns: 140px 1fr;
                gap: 12px;
            }
            .article-card-body {
                padding: 12px 14px 12px 2px;
            }
            .article-card-body h3 {
                font-size: 16px;
            }
            .article-card-body .article-excerpt {
                font-size: 13px;
                line-height: 1.65;
            }
            .category-intro-card {
                flex-direction: column;
                gap: 16px;
                padding: 24px;
            }
            .cta-box {
                padding: 32px 24px;
            }
            .cta-box h2 {
                font-size: 22px;
            }
            .section-articles .section-heading h2,
            .section-faq .section-heading h2 {
                font-size: 24px;
            }
            .sticky-cta-text {
                font-size: 12px;
            }
            .sticky-cta-bar .btn {
                padding: 6px 14px;
                font-size: 12px;
                min-height: 34px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .footer-bottom-links {
                margin-left: 0;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-category-content h1 {
                font-size: 24px;
            }
            .hero-cta-group {
                flex-direction: column;
                gap: 10px;
            }
            .btn {
                width: 100%;
                font-size: 14px;
                padding: 12px 20px;
            }
            .progress-ring-wrap {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .article-card {
                grid-template-columns: 1fr;
                gap: 0;
            }
            .article-card-image {
                height: 180px;
                min-height: auto;
            }
            .article-card-body {
                padding: 14px 16px;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .section-articles .section-heading {
                flex-direction: column;
                align-items: flex-start;
            }
            .deep-content-text h2 {
                font-size: 24px;
            }
            .faq-question {
                font-size: 14px;
                padding: 16px 18px;
            }
            .faq-answer p {
                padding: 0 18px 16px;
                font-size: 13px;
            }
            .sticky-cta-bar {
                height: 56px;
            }
            .sticky-cta-text {
                font-size: 11px;
                white-space: normal;
                line-height: 1.4;
            }
            .sticky-cta-bar .btn {
                padding: 6px 10px;
                font-size: 11px;
                min-height: 32px;
            }
        }

/* roulang page: category6 */
:root {
            --bg-primary: #0D0F14;
            --bg-card: #14171E;
            --bg-card-light: #1A1D24;
            --bg-elevated: #1E2129;
            --text-primary: #F5F1EA;
            --text-secondary: #B8B2AA;
            --text-muted: #7A7670;
            --accent-cyan: #00D9A6;
            --accent-cyan-glow: rgba(0, 217, 166, 0.25);
            --accent-orange: #FF6B3D;
            --accent-orange-glow: rgba(255, 107, 61, 0.22);
            --accent-purple: #7A4DFF;
            --accent-purple-glow: rgba(122, 77, 255, 0.2);
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 217, 166, 0.45);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition-fast: 0.2s ease;
            --transition-medium: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 66px;
            --sticky-bar-height: 56px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            overflow-x: hidden;
            padding-bottom: var(--sticky-bar-height);
            position: relative;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover,
        a:focus {
            color: var(--accent-orange);
            outline: none;
        }
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }
        button {
            font-family: var(--font-sans);
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 顶部导航栏 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }
        .nav-logo-area {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .nav-logo {
            font-size: 28px;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            line-height: 1;
            white-space: nowrap;
        }
        .nav-logo .logo-accent {
            color: var(--accent-cyan);
        }
        .nav-divider {
            width: 1px;
            height: 28px;
            background: var(--border-color);
            flex-shrink: 0;
        }
        .nav-tagline {
            font-size: 12px;
            color: var(--text-muted);
            white-space: nowrap;
            letter-spacing: 0.5px;
            font-weight: 500;
        }
        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
            justify-content: flex-end;
        }
        .nav-links-desktop a {
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            padding: 8px 11px;
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
        }
        .nav-links-desktop a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 217, 166, 0.06);
        }
        .nav-links-desktop a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 11px;
            right: 11px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--accent-cyan-glow);
        }
        .nav-toggle {
            display: none;
            background: var(--bg-card-light);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast), border-color var(--transition-fast);
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            background: var(--bg-elevated);
            border-color: var(--accent-cyan);
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(13, 15, 20, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 99;
            padding: 24px;
            flex-direction: column;
            gap: 4px;
            overflow-y: auto;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            color: var(--text-primary);
            font-size: 18px;
            font-weight: 600;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition-fast), color var(--transition-fast);
        }
        .mobile-nav a:hover {
            background: rgba(0, 217, 166, 0.06);
            color: var(--accent-cyan);
        }
        .mobile-nav a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            padding: 20px 0 12px;
            border-bottom: 1px solid var(--border-color);
            background: rgba(13, 15, 20, 0.6);
        }
        .breadcrumb {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        /* ===== Hero 区域 ===== */
        .community-hero {
            padding: 60px 0 50px;
            position: relative;
            background:
                radial-gradient(ellipse at 20% 30%, rgba(0, 217, 166, 0.07) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 70%, rgba(122, 77, 255, 0.06) 0%, transparent 50%),
                var(--bg-primary);
        }
        .community-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }
        .community-hero .container {
            position: relative;
            z-index: 1;
        }
        .community-hero .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .hero-left .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 217, 166, 0.1);
            border: 1px solid rgba(0, 217, 166, 0.3);
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 30px;
            margin-bottom: 20px;
        }
        .hero-left h1 {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-left h1 .highlight {
            color: var(--accent-cyan);
            position: relative;
        }
        .hero-left h1 .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent-orange);
            border-radius: 2px;
            opacity: 0.5;
        }
        .hero-left .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            border: none;
            transition: all var(--transition-medium);
            text-decoration: none;
            letter-spacing: 0.3px;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--accent-cyan);
            color: #0D0F14;
            box-shadow: 0 4px 16px var(--accent-cyan-glow);
        }
        .btn-primary:hover {
            background: var(--accent-orange);
            color: #0D0F14;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px var(--accent-orange-glow);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }
        .btn-outline:hover {
            background: rgba(0, 217, 166, 0.08);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 10px 20px;
            font-size: 13px;
            border-radius: var(--radius-sm);
        }

        /* Hero 右侧竖屏视频卡片 */
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .vertical-video-card {
            width: 280px;
            aspect-ratio: 9 / 16;
            background: linear-gradient(180deg, var(--bg-card-light) 0%, var(--bg-card) 60%, #0A0C10 100%);
            border-radius: 20px;
            border: 2px solid rgba(0, 217, 166, 0.25);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 0 8px rgba(0, 217, 166, 0.04);
            overflow: hidden;
            position: relative;
            display: flex;
            flex-direction: column;
        }
        .vertical-video-card .video-thumb {
            flex: 1;
            position: relative;
            overflow: hidden;
            background: #1A1D24;
        }
        .vertical-video-card .video-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.85;
        }
        .vertical-video-card .video-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.35);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .vertical-video-card .play-btn {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 217, 166, 0.9);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 22px;
            color: #0D0F14;
            transition: all var(--transition-medium);
            border: none;
            box-shadow: 0 8px 24px rgba(0, 217, 166, 0.4);
        }
        .vertical-video-card .play-btn:hover {
            transform: scale(1.1);
            background: var(--accent-orange);
            color: #0D0F14;
            box-shadow: 0 12px 32px var(--accent-orange-glow);
        }
        .vertical-video-card .video-info {
            padding: 14px 16px;
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
        }
        .vertical-video-card .video-info .video-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.5;
        }
        .vertical-video-card .video-info .video-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .vertical-video-card .video-info .video-meta .tag {
            background: rgba(122, 77, 255, 0.2);
            color: #B4A4FF;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 600;
        }

        /* ===== 分类简介 ===== */
        .category-intro {
            padding: 40px 0 30px;
            background: var(--bg-primary);
        }
        .category-intro .intro-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 36px;
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
        }
        .category-intro .intro-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple));
            border-radius: 4px 0 0 4px;
        }
        .category-intro .intro-card h2 {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .category-intro .intro-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 900px;
        }

        /* ===== 社区特色卖点 ===== */
        .community-features {
            padding: 50px 0 60px;
        }
        .community-features .section-header {
            margin-bottom: 36px;
        }
        .community-features .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.5px;
        }
        .community-features .section-header p {
            font-size: 15px;
            color: var(--text-muted);
        }
        .features-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-medium);
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md);
        }
        .feature-card .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
        }
        .feature-card .feature-icon.cyan {
            background: rgba(0, 217, 166, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 217, 166, 0.2);
        }
        .feature-card .feature-icon.orange {
            background: rgba(255, 107, 61, 0.12);
            color: var(--accent-orange);
            border: 1px solid rgba(255, 107, 61, 0.2);
        }
        .feature-card .feature-icon.purple {
            background: rgba(122, 77, 255, 0.12);
            color: #B4A4FF;
            border: 1px solid rgba(122, 77, 255, 0.2);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }
        .feature-card .feature-stat {
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
            display: flex;
            gap: 20px;
        }
        .feature-card .feature-stat .stat-item {
            display: flex;
            flex-direction: column;
        }
        .feature-card .feature-stat .stat-number {
            font-size: 22px;
            font-weight: 800;
            color: var(--accent-cyan);
        }
        .feature-card .feature-stat .stat-label {
            font-size: 12px;
            color: var(--text-muted);
        }
        .features-grid-right {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        /* ===== 深度内容区 ===== */
        .community-deep {
            padding: 50px 0 60px;
            background:
                radial-gradient(ellipse at 50% 50%, rgba(0, 217, 166, 0.04) 0%, transparent 60%),
                var(--bg-primary);
        }
        .community-deep .deep-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            box-shadow: var(--shadow-md);
        }
        .community-deep .deep-card h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .community-deep .deep-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-top: 24px;
            margin-bottom: 12px;
        }
        .community-deep .deep-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .community-deep .deep-card .deep-image {
            margin: 28px 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .community-deep .deep-card .deep-image img {
            width: 100%;
            aspect-ratio: 21/9;
            object-fit: cover;
        }
        .community-deep .deep-card .deep-tip {
            background: rgba(0, 217, 166, 0.06);
            border-left: 3px solid var(--accent-cyan);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-size: 14px;
            color: var(--text-secondary);
            margin: 20px 0;
            line-height: 1.75;
        }

        /* ===== 热门话题卡片列表 ===== */
        .community-topics {
            padding: 50px 0 60px;
        }
        .community-topics .section-header {
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .community-topics .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0;
            letter-spacing: -0.5px;
        }
        .community-topics .section-header .view-all {
            font-size: 14px;
            color: var(--accent-cyan);
            font-weight: 600;
        }
        .topic-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-medium);
            box-shadow: var(--shadow-sm);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .topic-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md);
        }
        .topic-card .topic-image {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .topic-card .topic-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-medium);
        }
        .topic-card:hover .topic-image img {
            transform: scale(1.05);
        }
        .topic-card .topic-image .topic-category {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(13, 15, 20, 0.85);
            color: var(--accent-cyan);
            font-size: 11px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 20px;
            border: 1px solid rgba(0, 217, 166, 0.3);
            letter-spacing: 0.5px;
        }
        .topic-card .topic-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .topic-card .topic-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .topic-card .topic-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .topic-card .topic-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
        }
        .topic-card .topic-meta .author-info {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .topic-card .topic-meta .author-avatar {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--bg-elevated);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            color: var(--accent-cyan);
            font-weight: 700;
            border: 1px solid var(--border-color);
        }
        .topic-card .topic-meta .read-more-btn {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
        }
        .topic-card .topic-meta .read-more-btn:hover {
            color: var(--accent-orange);
            background: rgba(255, 107, 61, 0.06);
        }
        .topic-card .topic-meta .read-more-btn i {
            font-size: 12px;
            transition: transform var(--transition-fast);
        }
        .topic-card .topic-meta .read-more-btn:hover i {
            transform: translateX(4px);
        }

        /* ===== 加入流程 ===== */
        .join-steps {
            padding: 50px 0 60px;
            background: var(--bg-primary);
        }
        .join-steps .section-header {
            margin-bottom: 36px;
        }
        .join-steps .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .join-steps .section-header p {
            font-size: 15px;
            color: var(--text-muted);
        }
        .steps-layout {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            text-align: center;
            transition: all var(--transition-medium);
            position: relative;
            box-shadow: var(--shadow-sm);
        }
        .step-item:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md);
        }
        .step-item .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(0, 217, 166, 0.1);
            border: 1px solid rgba(0, 217, 166, 0.25);
            color: var(--accent-cyan);
            font-size: 16px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
        }
        .step-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .community-faq {
            padding: 50px 0 60px;
            background:
                radial-gradient(ellipse at 30% 20%, rgba(122, 77, 255, 0.05) 0%, transparent 50%),
                var(--bg-primary);
        }
        .community-faq .section-header {
            margin-bottom: 32px;
        }
        .community-faq .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-medium);
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            border-color: var(--border-hover);
        }
        .faq-item.active {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            gap: 16px;
            transition: color var(--transition-fast);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-sans);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-elevated);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: all var(--transition-fast);
            color: var(--text-muted);
        }
        .faq-item.active .faq-question .faq-icon {
            background: rgba(0, 217, 166, 0.15);
            color: var(--accent-cyan);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            border-top: none;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            border-top: 1px solid var(--border-color);
        }
        .faq-answer p {
            padding: 18px 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
            border-left: 3px solid var(--accent-cyan);
            margin-left: 24px;
            padding-left: 20px;
        }

        /* ===== CTA 区域 ===== */
        .community-cta {
            padding: 50px 0 60px;
        }
        .cta-banner {
            background: linear-gradient(135deg, var(--bg-card-light) 0%, var(--bg-card) 50%, #0A0C10 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 44px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -60%;
            left: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse, rgba(0, 217, 166, 0.08) 0%, transparent 60%);
            transform: rotate(20deg);
            pointer-events: none;
        }
        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -60%;
            right: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse, rgba(122, 77, 255, 0.08) 0%, transparent 60%);
            transform: rotate(-20deg);
            pointer-events: none;
        }
        .cta-banner h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
            letter-spacing: -0.5px;
        }
        .cta-banner p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.8;
            position: relative;
            z-index: 1;
        }
        .cta-banner .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* ===== 底部固定转化条 ===== */
        .sticky-conversion-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background: rgba(13, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            z-index: 90;
            box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.4);
        }
        .sticky-conversion-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }
        .sticky-conversion-bar .sticky-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sticky-conversion-bar .sticky-text i {
            color: var(--accent-cyan);
            font-size: 16px;
        }
        .sticky-conversion-bar .sticky-btn {
            padding: 9px 22px;
            font-size: 13px;
            font-weight: 700;
            background: var(--accent-cyan);
            color: #0D0F14;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
        }
        .sticky-conversion-bar .sticky-btn:hover {
            background: var(--accent-orange);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px var(--accent-orange-glow);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0A0C10;
            border-top: 1px solid var(--border-color);
            padding: 48px 0 28px;
            margin-bottom: var(--sticky-bar-height);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        .site-footer .footer-brand-name {
            font-size: 24px;
            font-weight: 900;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .site-footer .footer-brand-name .accent {
            color: var(--accent-cyan);
        }
        .site-footer .footer-brand-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 0;
        }
        .site-footer .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .site-footer .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }
        .site-footer .footer-col ul li a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-form {
            display: flex;
            gap: 8px;
        }
        .footer-form input {
            flex: 1;
            padding: 10px 14px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 13px;
            font-family: var(--font-sans);
            transition: border-color var(--transition-fast);
            outline: none;
        }
        .footer-form input:focus {
            border-color: var(--accent-cyan);
        }
        .footer-form input::placeholder {
            color: var(--text-muted);
        }
        .footer-form button {
            padding: 10px 18px;
            background: var(--accent-cyan);
            color: #0D0F14;
            border: none;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 700;
            cursor: pointer;
            transition: all var(--transition-fast);
            font-family: var(--font-sans);
        }
        .footer-form button:hover {
            background: var(--accent-orange);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .site-footer .footer-bottom .footer-bottom-links {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-footer .footer-bottom a {
            color: var(--text-muted);
            font-size: 12px;
            transition: color var(--transition-fast);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* ===== 响应式设计 ===== */
        @media (max-width: 1024px) {
            .community-hero .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero-left {
                text-align: center;
            }
            .hero-left .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-visual {
                justify-content: center;
            }
            .vertical-video-card {
                width: 240px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .features-grid-right {
                grid-template-columns: 1fr 1fr;
            }
            .steps-layout {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 56px;
                --sticky-bar-height: 52px;
            }
            .container {
                padding: 0 16px;
            }
            .nav-links-desktop {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-logo {
                font-size: 24px;
            }
            .nav-tagline {
                font-size: 10px;
            }
            .community-hero {
                padding: 36px 0 32px;
            }
            .hero-left h1 {
                font-size: 30px;
            }
            .hero-left .hero-subtitle {
                font-size: 15px;
            }
            .btn {
                padding: 11px 20px;
                font-size: 13px;
            }
            .vertical-video-card {
                width: 200px;
            }
            .category-intro .intro-card {
                padding: 24px 20px;
            }
            .community-features {
                padding: 36px 0 40px;
            }
            .community-features .section-header h2 {
                font-size: 26px;
            }
            .features-grid-right {
                grid-template-columns: 1fr;
            }
            .community-deep {
                padding: 36px 0 40px;
            }
            .community-deep .deep-card {
                padding: 26px 20px;
            }
            .community-deep .deep-card h2 {
                font-size: 24px;
            }
            .community-topics {
                padding: 36px 0 40px;
            }
            .community-topics .section-header h2 {
                font-size: 26px;
            }
            .topic-card .topic-image {
                height: 160px;
            }
            .join-steps {
                padding: 36px 0 40px;
            }
            .join-steps .section-header h2 {
                font-size: 26px;
            }
            .steps-layout {
                grid-template-columns: 1fr;
            }
            .community-faq {
                padding: 36px 0 40px;
            }
            .community-faq .section-header h2 {
                font-size: 26px;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 18px;
            }
            .faq-answer p {
                padding: 14px 18px 16px;
                margin-left: 18px;
                padding-left: 14px;
                font-size: 13px;
            }
            .community-cta {
                padding: 36px 0 40px;
            }
            .cta-banner {
                padding: 30px 22px;
            }
            .cta-banner h2 {
                font-size: 24px;
            }
            .sticky-conversion-bar .sticky-text {
                font-size: 12px;
            }
            .sticky-conversion-bar .sticky-btn {
                padding: 7px 14px;
                font-size: 11px;
            }
            .site-footer {
                padding: 36px 0 20px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-form {
                flex-direction: column;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .site-footer .footer-bottom .footer-bottom-links {
                margin-left: 0;
            }
        }
        @media (max-width: 520px) {
            .hero-left h1 {
                font-size: 24px;
                line-height: 1.4;
            }
            .hero-left .hero-subtitle {
                font-size: 14px;
            }
            .btn {
                width: 100%;
                text-align: center;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .vertical-video-card {
                width: 170px;
            }
            .vertical-video-card .video-info .video-title {
                font-size: 12px;
            }
            .topic-card .topic-image {
                height: 140px;
            }
            .topic-card .topic-body h3 {
                font-size: 16px;
            }
            .community-deep .deep-card h3 {
                font-size: 18px;
            }
            .community-deep .deep-card p {
                font-size: 14px;
                line-height: 1.8;
            }
        }