/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0a0e1a;
            --primary-light: #111827;
            --secondary: #141c3a;
            --accent: #7c3aed;
            --accent-hover: #6d28d9;
            --accent-glow: rgba(124, 58, 237, 0.35);
            --gold: #f59e0b;
            --gold-hover: #d97706;
            --success: #10b981;
            --info: #3b82f6;
            --text: #f1f5f9;
            --text-muted: #94a3b8;
            --text-dark: #1e293b;
            --border: #1e293b;
            --border-light: #334155;
            --card-bg: #111827;
            --card-hover: #1a1f35;
            --overlay: rgba(0, 0, 0, 0.7);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.25);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-top-h: 40px;
            --nav-h: 72px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--primary);
            background-image: radial-gradient(ellipse at 20% 50%, rgba(124, 58, 237, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 20%, rgba(245, 158, 11, 0.04) 0%, transparent 50%);
            min-height: 100vh;
        }

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }

        h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.15rem;
        }

        p {
            color: var(--text-muted);
            margin-bottom: 1rem;
        }

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

        .container-sm {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 顶部信息条 ===== */
        .header-top {
            background: var(--secondary);
            border-bottom: 1px solid var(--border);
            height: var(--header-top-h);
            display: flex;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

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

        .header-top a {
            color: var(--text-muted);
            font-size: 0.8rem;
            margin-left: 16px;
        }

        .header-top a:hover {
            color: var(--accent);
        }

        .header-top .top-left span {
            margin-right: 20px;
        }

        .header-top .top-left i {
            margin-right: 6px;
            color: var(--accent);
        }

        /* ===== 主导航 ===== */
        .main-header {
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--nav-h);
            transition: background var(--transition);
        }

        .main-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
        }

        .logo a:hover {
            color: var(--text);
        }

        .logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent), var(--gold));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: #fff;
            flex-shrink: 0;
        }

        .logo .logo-text {
            background: linear-gradient(135deg, var(--text), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-menu a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            position: relative;
        }

        .nav-menu a:hover {
            color: var(--text);
            background: rgba(124, 58, 237, 0.1);
        }

        .nav-menu a.active {
            color: var(--text);
            background: rgba(124, 58, 237, 0.15);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--accent), var(--accent-hover)) !important;
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
            margin-left: 8px;
        }

        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(124, 58, 237, 0.45);
            color: #fff !important;
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            font-size: 1.5rem;
            padding: 8px;
            cursor: pointer;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            min-height: 75vh;
            display: flex;
            align-items: center;
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(10, 14, 26, 0.88) 0%,
                    rgba(10, 14, 26, 0.6) 40%,
                    rgba(124, 58, 237, 0.2) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--primary), transparent);
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
            padding-top: 40px;
            padding-bottom: 60px;
        }

        .hero-content {
            max-width: 720px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(124, 58, 237, 0.15);
            border: 1px solid rgba(124, 58, 237, 0.3);
            border-radius: 50px;
            padding: 6px 18px 6px 10px;
            font-size: 0.85rem;
            color: var(--accent);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }

        .hero-badge i {
            font-size: 0.75rem;
        }

        .hero h1 {
            font-size: clamp(2.2rem, 6vw, 4rem);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent), var(--gold));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: #fff;
            box-shadow: 0 4px 20px rgba(124, 58, 237, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(124, 58, 237, 0.5);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            color: var(--text);
            border: 1.5px solid var(--border-light);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(124, 58, 237, 0.08);
            transform: translateY(-2px);
        }

        .btn-gold {
            background: linear-gradient(135deg, var(--gold), var(--gold-hover));
            color: #1a1a2e;
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
        }

        .btn-gold:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.45);
            color: #1a1a2e;
        }

        .btn-sm {
            padding: 10px 20px;
            font-size: 0.9rem;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

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

        .hero-stat-item .number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
        }

        .hero-stat-item .number .accent {
            color: var(--accent);
        }

        .hero-stat-item .label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }

        .section-dark {
            background: var(--primary-light);
        }

        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-header h2 {
            margin-bottom: 12px;
        }

        .section-header p {
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
        }

        .section-header .section-tag {
            display: inline-block;
            background: rgba(124, 58, 237, 0.12);
            color: var(--accent);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        /* ===== 特色板块 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            opacity: 0;
            transition: opacity var(--transition);
        }

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

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

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
            background: rgba(124, 58, 237, 0.12);
            color: var(--accent);
        }

        .feature-icon.gold {
            background: rgba(245, 158, 11, 0.12);
            color: var(--gold);
        }

        .feature-icon.green {
            background: rgba(16, 185, 129, 0.12);
            color: var(--success);
        }

        .feature-card h3 {
            margin-bottom: 12px;
            font-size: 1.2rem;
        }

        .feature-card p {
            font-size: 0.93rem;
            margin-bottom: 0;
        }

        /* ===== 赛事分类板块 ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .category-card {
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--card-bg);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
        }

        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
            border-color: var(--accent);
        }

        .category-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }

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

        .category-card .card-body {
            padding: 24px 22px 28px;
        }

        .category-card .card-tag {
            display: inline-block;
            background: rgba(124, 58, 237, 0.12);
            color: var(--accent);
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .category-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }

        .category-card p {
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        .category-card .card-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .category-card .card-link i {
            transition: transform var(--transition);
        }

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

        /* ===== 最新资讯板块 ===== */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .article-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: all var(--transition);
        }

        .article-card:hover {
            border-color: var(--accent);
            background: var(--card-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }

        .article-card .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .article-card .article-cat {
            background: rgba(124, 58, 237, 0.12);
            color: var(--accent);
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.75rem;
        }

        .article-card .article-date {
            color: var(--text-muted);
        }

        .article-card h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .article-card h3 a {
            color: var(--text);
        }

        .article-card h3 a:hover {
            color: var(--accent);
        }

        .article-card p {
            font-size: 0.9rem;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .no-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            background: var(--card-bg);
            border-radius: var(--radius);
            border: 1px dashed var(--border-light);
            color: var(--text-muted);
            font-size: 1rem;
        }

        .no-posts i {
            font-size: 2rem;
            display: block;
            margin-bottom: 12px;
            color: var(--border-light);
        }

        /* ===== 数据统计板块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            transition: all var(--transition);
        }

        .stat-card:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
            box-shadow: var(--shadow-glow);
        }

        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .stat-card .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
        }

        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ===== 加入流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
        }

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

        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 20px;
            box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
        }

        .step-card h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            transition: background var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-question:hover {
            background: rgba(124, 58, 237, 0.04);
        }

        .faq-question i {
            color: var(--accent);
            transition: transform var(--transition);
            font-size: 0.85rem;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.93rem;
            color: var(--text-muted);
            display: none;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary), var(--primary-light));
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .cta-box {
            text-align: center;
            padding: 20px 0;
        }

        .cta-box h2 {
            margin-bottom: 16px;
        }

        .cta-box p {
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }

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

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

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

        .footer-brand .logo a {
            font-size: 1.3rem;
            margin-bottom: 16px;
            display: inline-flex;
        }

        .footer-brand p {
            font-size: 0.9rem;
            max-width: 320px;
            margin-top: 12px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }

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

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

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

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

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-light);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .categories-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-top-h: 0px;
            }

            .header-top {
                display: none;
            }

            .menu-toggle {
                display: block;
            }

            .nav-menu {
                position: absolute;
                top: var(--nav-h);
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                display: none;
                box-shadow: var(--shadow);
            }

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

            .nav-menu a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }

            .nav-menu a.active::after {
                display: none;
            }

            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }

            .hero {
                min-height: 60vh;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-stat-item .number {
                font-size: 1.4rem;
            }

            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .articles-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

            .stat-card .stat-number {
                font-size: 1.6rem;
            }
        }

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

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }

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

            .stat-card {
                padding: 20px 12px;
            }

            .stat-card .stat-number {
                font-size: 1.3rem;
            }

            .feature-card {
                padding: 24px 20px;
            }

            .article-card {
                padding: 20px 18px;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 0.93rem;
            }

            .faq-answer {
                padding: 0 18px 16px;
            }

            .btn {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #7c3aed;
            --primary-light: #8b5cf6;
            --primary-dark: #6d28d9;
            --secondary: #06b6d4;
            --secondary-light: #22d3ee;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-dark: #0b0b1a;
            --bg-card: #12122a;
            --bg-card-hover: #1a1a3e;
            --bg-elevated: #1e1e42;
            --text-primary: #f1f1f9;
            --text-secondary: #a0a0c8;
            --text-muted: #6b6b8a;
            --border-color: #2a2a52;
            --border-light: #3a3a6a;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.25);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.35);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 30px rgba(124,58,237,0.25);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 80px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }
        a { color: var(--secondary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 11, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
            height: var(--header-height);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .logo a:hover { color: var(--text-primary); }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            box-shadow: 0 0 20px rgba(124,58,237,0.3);
        }
        .logo-text { background: linear-gradient(135deg, var(--text-primary), var(--secondary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-menu { display: flex; align-items: center; gap: 6px; }
        .nav-menu a {
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-menu a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
        .nav-menu a.active { color: var(--text-primary); background: rgba(124,58,237,0.15); }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-menu a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(124,58,237,0.3);
            margin-left: 8px;
        }
        .nav-menu a.nav-cta:hover { background: linear-gradient(135deg, var(--primary-light), var(--primary)); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(124,58,237,0.4); }
        .nav-menu a.nav-cta i { margin-right: 8px; }

        /* Mobile Nav Toggle */
        .nav-toggle { display: none; background: none; color: var(--text-primary); font-size: 1.6rem; cursor: pointer; padding: 8px; border-radius: var(--radius-sm); }
        .nav-toggle:hover { background: rgba(255,255,255,0.05); }

        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(11, 11, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
            }
            .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: all; }
            .nav-menu a { width: 100%; padding: 14px 20px; font-size: 1.05rem; }
            .nav-menu a.active::after { display: none; }
            .nav-menu a.nav-cta { margin-left: 0; margin-top: 8px; text-align: center; }
        }

        /* ===== Hero / Banner ===== */
        .article-banner {
            margin-top: var(--header-height);
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11,11,26,0.88) 0%, rgba(11,11,26,0.6) 50%, rgba(11,11,26,0.88) 100%);
            z-index: 1;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(124,58,237,0.15) 0%, transparent 70%);
            z-index: 1;
        }
        .article-banner .container { position: relative; z-index: 2; padding: 60px 24px; }
        .article-banner .category-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
            box-shadow: 0 4px 16px rgba(124,58,237,0.3);
        }
        .article-banner h1 {
            max-width: 800px;
            margin: 0 auto 16px;
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            line-height: 1.25;
        }
        .article-meta-banner {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-meta-banner span { display: inline-flex; align-items: center; gap: 6px; }
        .article-meta-banner i { color: var(--secondary); font-size: 0.8rem; }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            background: rgba(255,255,255,0.02);
            border-bottom: 1px solid var(--border-color);
            padding: 14px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--secondary-light); }
        .breadcrumb .sep { color: var(--text-muted); font-size: 0.7rem; }
        .breadcrumb .current { color: var(--text-primary); font-weight: 500; }

        /* ===== Article Main ===== */
        .article-section { padding: 60px 0; }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 40px 44px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .article-body .article-title-block { margin-bottom: 28px; padding-bottom: 28px; border-bottom: 1px solid var(--border-color); }
        .article-body .article-title-block h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 12px; }
        .article-body .article-meta-line {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-body .article-meta-line span { display: inline-flex; align-items: center; gap: 6px; }
        .article-body .article-meta-line i { color: var(--secondary); font-size: 0.8rem; }
        .article-body .article-content { font-size: 1.05rem; line-height: 1.85; color: var(--text-secondary); }
        .article-body .article-content p { margin-bottom: 1.2rem; }
        .article-body .article-content h2, .article-body .article-content h3 { margin-top: 2rem; margin-bottom: 0.8rem; color: var(--text-primary); }
        .article-body .article-content img { margin: 1.5rem 0; border-radius: var(--radius-sm); }
        .article-body .article-content ul, .article-body .article-content ol { margin: 1rem 0; padding-left: 1.5rem; color: var(--text-secondary); }
        .article-body .article-content ul { list-style: disc; }
        .article-body .article-content ol { list-style: decimal; }
        .article-body .article-content li { margin-bottom: 0.4rem; }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(124,58,237,0.08);
            padding: 16px 24px;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        /* Tags */
        .article-tags { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border-color); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
        .article-tags .tag-label { font-size: 0.9rem; color: var(--text-muted); font-weight: 500; }
        .article-tags .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(124,58,237,0.12);
            color: var(--primary-light);
            font-size: 0.8rem;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid rgba(124,58,237,0.2);
        }
        .article-tags .tag:hover { background: rgba(124,58,237,0.25); color: var(--text-primary); }

        /* Sidebar */
        .article-sidebar { display: flex; flex-direction: column; gap: 28px; }
        .sidebar-widget {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-widget h3 {
            font-size: 1.1rem;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-widget h3 i { color: var(--primary); font-size: 1rem; }
        .sidebar-list li { margin-bottom: 12px; }
        .sidebar-list li a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            transition: var(--transition);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.02);
        }
        .sidebar-list li a:hover { background: rgba(124,58,237,0.08); color: var(--text-primary); }
        .sidebar-list li a .num {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(124,58,237,0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary-light);
            flex-shrink: 0;
        }
        .sidebar-list li a .text { flex: 1; }
        .sidebar-list li a .text .title { display: block; font-weight: 500; }
        .sidebar-list li a .text .date { display: block; font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }

        /* ===== Related Posts ===== */
        .related-section { padding: 60px 0; background: rgba(255,255,255,0.015); border-top: 1px solid var(--border-color); }
        .related-section .section-title { text-align: center; margin-bottom: 40px; }
        .related-section .section-title h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
        .related-section .section-title p { color: var(--text-muted); max-width: 500px; margin: 8px auto 0; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--border-light); }
        .related-card .card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .related-card:hover .card-img img { transform: scale(1.05); }
        .related-card .card-img .card-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(11,11,26,0.8);
            backdrop-filter: blur(8px);
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-primary);
            border: 1px solid rgba(255,255,255,0.1);
        }
        .related-card .card-body { padding: 20px 22px 24px; }
        .related-card .card-body h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .related-card .card-body h3 a { color: var(--text-primary); }
        .related-card .card-body h3 a:hover { color: var(--secondary-light); }
        .related-card .card-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-body .card-meta { display: flex; align-items: center; gap: 14px; margin-top: 12px; font-size: 0.8rem; color: var(--text-muted); }

        /* ===== CTA ===== */
        .cta-section { padding: 80px 0; background: linear-gradient(135deg, rgba(124,58,237,0.08) 0%, rgba(6,182,212,0.08) 100%); text-align: center; position: relative; overflow: hidden; }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -30%;
            width: 80%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(124,58,237,0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: 14px; }
        .cta-section p { max-width: 600px; margin: 0 auto 28px; font-size: 1.05rem; color: var(--text-muted); }
        .cta-section .cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 4px 20px rgba(124,58,237,0.3);
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }
        .btn-primary:hover { background: linear-gradient(135deg, var(--primary-light), var(--primary)); transform: translateY(-3px); box-shadow: 0 10px 35px rgba(124,58,237,0.4); color: #fff; }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.05);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: var(--border-light); transform: translateY(-3px); color: var(--text-primary); }

        /* ===== Footer ===== */
        .site-footer {
            background: #08081a;
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-color);
        }
        .footer-brand .logo { margin-bottom: 16px; }
        .footer-brand p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; max-width: 360px; }
        .footer-col h4 { font-size: 1rem; color: var(--text-primary); margin-bottom: 18px; font-weight: 600; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 0.9rem; color: var(--text-muted); transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--secondary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom span { font-size: 0.85rem; color: var(--text-muted); }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255,255,255,0.04);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-3px); box-shadow: 0 8px 24px rgba(124,58,237,0.3); }

        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .footer-brand { grid-column: 1 / -1; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
        }

        /* ===== Error State ===== */
        .error-container { text-align: center; padding: 60px 20px; }
        .error-container .error-icon { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
        .error-container h2 { margin-bottom: 12px; }
        .error-container p { color: var(--text-muted); margin-bottom: 24px; }
        .error-container .btn-back { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm); background: var(--primary); color: #fff; font-weight: 600; transition: var(--transition); }
        .error-container .btn-back:hover { background: var(--primary-light); transform: translateY(-2px); color: #fff; }

        /* ===== Responsive Article ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        }
        @media (max-width: 768px) {
            .article-body { padding: 24px 20px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr 1fr; }
            .article-banner { min-height: 240px; }
        }
        @media (max-width: 520px) {
            .related-grid { grid-template-columns: 1fr; }
            .article-banner h1 { font-size: 1.5rem; }
            .cta-buttons .btn-primary, .cta-buttons .btn-secondary { width: 100%; justify-content: center; }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
        .animate-fade-up { animation: fadeUp 0.6s ease-out both; }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0a0e27;
            --primary-light: #1a1f3a;
            --primary-mid: #16213e;
            --secondary: #00d4ff;
            --secondary-dark: #009dcc;
            --accent: #7c3aed;
            --accent-light: #a78bfa;
            --gold: #ffd700;
            --gold-dark: #e6c200;
            --bg-dark: #0d0d1a;
            --bg-section: #f4f6fc;
            --bg-card: #ffffff;
            --bg-card-alt: #f0f4ff;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #7a7a9a;
            --text-light: #ffffff;
            --text-light-muted: #c8c8e0;
            --border-color: #e2e6f0;
            --border-light: rgba(0, 212, 255, 0.25);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(10, 14, 39, 0.06);
            --shadow-md: 0 8px 28px rgba(10, 14, 39, 0.10);
            --shadow-lg: 0 20px 50px rgba(10, 14, 39, 0.14);
            --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.20);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
            --transition: 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
            --topbar-height: 38px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-section);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: var(--secondary-dark);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        h1 {
            font-size: clamp(2.2rem, 5.5vw, 3.6rem);
        }
        h2 {
            font-size: clamp(1.7rem, 3.8vw, 2.6rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.15rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== 顶部信息条 ===== */
        .topbar {
            background: var(--primary);
            color: var(--text-light-muted);
            font-size: 0.82rem;
            height: var(--topbar-height);
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .topbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .topbar a {
            color: var(--text-light-muted);
            margin-left: 18px;
            font-size: 0.8rem;
            transition: color var(--transition);
        }
        .topbar a:hover {
            color: var(--secondary);
        }
        .topbar .topbar-left span {
            color: var(--text-light-muted);
        }
        .topbar .topbar-left i {
            color: var(--secondary);
            margin-right: 6px;
        }

        /* ===== 导航 ===== */
        .site-header {
            background: var(--primary-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.30);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-light);
            font-weight: 800;
            font-size: 1.5rem;
            letter-spacing: -0.5px;
            transition: opacity var(--transition);
        }
        .logo a:hover {
            opacity: 0.88;
            color: var(--text-light);
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
        }
        .logo-text {
            background: linear-gradient(135deg, #ffffff, var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-menu a {
            color: var(--text-light-muted);
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            position: relative;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
            transition: transform var(--transition);
        }
        .nav-menu a:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-menu a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-menu a.active {
            color: var(--text-light);
            background: rgba(0, 212, 255, 0.12);
        }
        .nav-menu a.active::after {
            transform: translateX(-50%) scaleX(1);
            background: var(--secondary);
        }
        .nav-menu a.nav-cta {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #fff;
            padding: 10px 26px;
            border-radius: var(--radius-md);
            font-weight: 600;
            box-shadow: 0 4px 18px rgba(0, 212, 255, 0.30);
            transition: all var(--transition);
            margin-left: 8px;
        }
        .nav-menu a.nav-cta::after {
            display: none;
        }
        .nav-menu a.nav-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 30px rgba(0, 212, 255, 0.45);
            background: linear-gradient(135deg, var(--secondary-dark), var(--accent));
        }
        .nav-menu a.nav-cta i {
            margin-right: 6px;
        }

        /* 移动端汉堡按钮 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: none;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 28px;
            height: 2.5px;
            background: var(--text-light);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
            padding: 60px 20px;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 39, 0.88) 0%, rgba(13, 13, 26, 0.72) 100%);
            z-index: 1;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            width: 100%;
        }
        .category-hero h1 {
            color: var(--text-light);
            font-size: clamp(2.4rem, 6vw, 4rem);
            font-weight: 900;
            letter-spacing: -1px;
            margin-bottom: 12px;
        }
        .category-hero h1 span {
            background: linear-gradient(135deg, var(--secondary), var(--gold));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero .hero-sub {
            color: var(--text-light-muted);
            font-size: 1.15rem;
            max-width: 600px;
            margin: 0 auto 30px;
            line-height: 1.8;
        }
        .hero-search {
            display: flex;
            max-width: 520px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-xl);
            padding: 4px;
            border: 1px solid rgba(255, 255, 255, 0.10);
        }
        .hero-search input {
            flex: 1;
            padding: 14px 22px;
            background: transparent;
            color: var(--text-light);
            font-size: 1rem;
            border-radius: var(--radius-xl) 0 0 var(--radius-xl);
        }
        .hero-search input::placeholder {
            color: var(--text-light-muted);
            opacity: 0.7;
        }
        .hero-search button {
            padding: 14px 30px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #fff;
            font-weight: 600;
            border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
            cursor: pointer;
            transition: all var(--transition);
            font-size: 1rem;
        }
        .hero-search button:hover {
            background: linear-gradient(135deg, var(--secondary-dark), var(--accent));
            transform: scale(1.02);
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 28px;
        }
        .hero-tags a {
            padding: 6px 18px;
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: var(--radius-xl);
            color: var(--text-light-muted);
            font-size: 0.85rem;
            font-weight: 500;
            transition: all var(--transition);
        }
        .hero-tags a:hover {
            background: rgba(0, 212, 255, 0.18);
            border-color: var(--secondary);
            color: var(--text-light);
            transform: translateY(-2px);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            margin-bottom: 8px;
            font-weight: 800;
        }
        .section-title p {
            max-width: 560px;
            margin: 0 auto;
            color: var(--text-muted);
            font-size: 1.05rem;
        }
        .section-title .title-tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(0, 212, 255, 0.12);
            color: var(--secondary-dark);
            border-radius: var(--radius-xl);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        /* ===== 分类简介卡片 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .intro-text h3 {
            font-size: 1.8rem;
            margin-bottom: 16px;
        }
        .intro-text p {
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .intro-text .intro-stats {
            display: flex;
            gap: 32px;
            margin-top: 24px;
        }
        .intro-text .intro-stats .stat-item {
            text-align: center;
        }
        .intro-text .intro-stats .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .intro-text .intro-stats .stat-item .label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background: var(--bg-card-alt);
            min-height: 300px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/coverpic/cover-1.png') center center / cover no-repeat;
        }

        /* ===== 标签云 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 12px;
        }
        .tag-cloud a {
            padding: 10px 26px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.92rem;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .tag-cloud a:hover {
            background: var(--primary);
            color: var(--text-light);
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .tag-cloud a .count {
            display: inline-block;
            background: rgba(0, 212, 255, 0.12);
            color: var(--secondary-dark);
            padding: 0 10px;
            border-radius: 20px;
            font-size: 0.75rem;
            margin-left: 6px;
            font-weight: 600;
        }
        .tag-cloud a:hover .count {
            background: rgba(255, 255, 255, 0.15);
            color: var(--secondary);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--secondary);
        }
        .card-item .card-img {
            height: 200px;
            background: var(--bg-card-alt) center center / cover no-repeat;
            position: relative;
        }
        .card-item .card-img .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 14px;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(6px);
            color: #fff;
            font-size: 0.78rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
        }
        .card-item .card-img .card-tag.hot {
            background: linear-gradient(135deg, #e94560, #c23152);
        }
        .card-item .card-img .card-tag.new {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
        }
        .card-item .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-item .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            font-weight: 700;
        }
        .card-item .card-body h3 a {
            color: var(--text-primary);
            transition: color var(--transition);
        }
        .card-item .card-body h3 a:hover {
            color: var(--secondary-dark);
        }
        .card-item .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            flex: 1;
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .card-item .card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .card-item .card-footer .meta i {
            margin-right: 4px;
            color: var(--secondary);
        }
        .card-item .card-footer .read-more {
            color: var(--secondary-dark);
            font-weight: 600;
            transition: all var(--transition);
        }
        .card-item .card-footer .read-more:hover {
            color: var(--accent);
            transform: translateX(4px);
        }

        /* ===== 排行列表 ===== */
        .rank-list {
            counter-reset: rank;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 18px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            cursor: default;
        }
        .rank-item:hover {
            transform: translateX(6px);
            box-shadow: var(--shadow-md);
            border-color: var(--secondary);
        }
        .rank-item .rank-num {
            font-size: 1.6rem;
            font-weight: 900;
            color: var(--text-muted);
            width: 48px;
            text-align: center;
            font-variant-numeric: tabular-nums;
        }
        .rank-item:nth-child(1) .rank-num {
            color: var(--gold);
        }
        .rank-item:nth-child(2) .rank-num {
            color: #c0c0c0;
        }
        .rank-item:nth-child(3) .rank-num {
            color: #cd7f32;
        }
        .rank-item .rank-info {
            flex: 1;
        }
        .rank-item .rank-info h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .rank-item .rank-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }
        .rank-item .rank-badge {
            padding: 4px 16px;
            border-radius: var(--radius-xl);
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(0, 212, 255, 0.10);
            color: var(--secondary-dark);
        }
        .rank-item .rank-badge.hot {
            background: rgba(233, 69, 96, 0.12);
            color: #e94560;
        }

        /* ===== 专题大卡 ===== */
        .feature-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: flex-end;
            background: var(--bg-dark) center center / cover no-repeat;
            box-shadow: var(--shadow-lg);
            transition: all var(--transition);
        }
        .feature-card:hover {
            transform: scale(1.01);
            box-shadow: var(--shadow-glow);
        }
        .feature-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 14, 39, 0.92) 0%, rgba(10, 14, 39, 0.20) 70%, transparent 100%);
            z-index: 1;
        }
        .feature-card .feature-content {
            position: relative;
            z-index: 2;
            padding: 40px 36px;
            color: var(--text-light);
            width: 100%;
        }
        .feature-card .feature-content .feature-tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            border-radius: var(--radius-xl);
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .feature-card .feature-content h3 {
            font-size: 1.7rem;
            color: var(--text-light);
            margin-bottom: 8px;
        }
        .feature-card .feature-content p {
            color: var(--text-light-muted);
            max-width: 480px;
            margin-bottom: 18px;
            font-size: 0.95rem;
        }
        .feature-card .feature-content .btn-outline-light {
            display: inline-block;
            padding: 10px 28px;
            border: 1px solid rgba(255, 255, 255, 0.30);
            border-radius: var(--radius-md);
            color: var(--text-light);
            font-weight: 600;
            transition: all var(--transition);
            font-size: 0.92rem;
        }
        .feature-card .feature-content .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--secondary);
            color: var(--secondary);
            transform: translateY(-2px);
        }

        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .feature-grid .feature-card {
            min-height: 320px;
        }
        .feature-grid .feature-card .feature-content h3 {
            font-size: 1.3rem;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item .faq-question {
            padding: 18px 26px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--text-primary);
            transition: background var(--transition);
            user-select: none;
        }
        .faq-item .faq-question:hover {
            background: rgba(0, 212, 255, 0.04);
        }
        .faq-item .faq-question i {
            color: var(--secondary);
            transition: transform var(--transition);
            font-size: 1.1rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.40s ease, padding 0.30s ease;
            padding: 0 26px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 4px 26px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 39, 0.92), rgba(13, 13, 26, 0.80));
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            color: var(--text-light);
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            margin-bottom: 12px;
        }
        .cta-section p {
            color: var(--text-light-muted);
            max-width: 520px;
            margin: 0 auto 30px;
            font-size: 1.05rem;
        }
        .cta-section .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-section .cta-buttons .btn-primary {
            padding: 14px 36px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #fff;
            font-weight: 700;
            border-radius: var(--radius-md);
            box-shadow: 0 6px 24px rgba(0, 212, 255, 0.30);
            transition: all var(--transition);
            font-size: 1rem;
        }
        .cta-section .cta-buttons .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 40px rgba(0, 212, 255, 0.45);
        }
        .cta-section .cta-buttons .btn-secondary {
            padding: 14px 36px;
            background: transparent;
            color: var(--text-light);
            font-weight: 600;
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition);
            font-size: 1rem;
        }
        .cta-section .cta-buttons .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--secondary);
            color: var(--secondary);
            transform: translateY(-3px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary);
            color: var(--text-light-muted);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo a {
            font-size: 1.3rem;
        }
        .footer-brand p {
            color: var(--text-light-muted);
            font-size: 0.9rem;
            margin-top: 16px;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            color: var(--text-light);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-light-muted);
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom span {
            color: var(--text-light-muted);
            opacity: 0.7;
        }
        .footer-social {
            display: flex;
            gap: 16px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-light-muted);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 212, 255, 0.25);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --topbar-height: 32px;
            }
            .topbar {
                font-size: 0.72rem;
            }
            .topbar .topbar-right a {
                margin-left: 10px;
                font-size: 0.7rem;
            }

            .hamburger {
                display: flex;
            }
            .nav-menu {
                position: fixed;
                top: calc(var(--header-height) + var(--topbar-height));
                left: 0;
                right: 0;
                background: var(--primary-light);
                flex-direction: column;
                padding: 16px 24px 28px;
                gap: 6px;
                transform: translateY(-110%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.40s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: 0 20px 50px rgba(0, 0, 0, 0.40);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                z-index: 999;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-menu a {
                padding: 12px 18px;
                width: 100%;
                text-align: center;
                font-size: 1rem;
            }
            .nav-menu a.nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }
            .nav-menu a::after {
                display: none;
            }

            .intro-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .intro-image {
                min-height: 220px;
                order: -1;
            }
            .intro-text .intro-stats {
                gap: 20px;
                flex-wrap: wrap;
            }
            .intro-text .intro-stats .stat-item .num {
                font-size: 1.6rem;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .rank-item {
                padding: 14px 18px;
                gap: 14px;
                flex-wrap: wrap;
            }
            .rank-item .rank-num {
                width: 36px;
                font-size: 1.3rem;
            }
            .feature-card {
                min-height: 280px;
            }
            .feature-card .feature-content {
                padding: 24px 20px;
            }
            .feature-card .feature-content h3 {
                font-size: 1.2rem;
            }

            .section {
                padding: 50px 0;
            }
            .section-title {
                margin-bottom: 32px;
            }

            .cta-section {
                padding: 50px 0;
            }
            .cta-section .cta-buttons .btn-primary,
            .cta-section .cta-buttons .btn-secondary {
                padding: 12px 28px;
                font-size: 0.92rem;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .category-hero {
                min-height: 320px;
                padding: 40px 16px;
            }
            .category-hero h1 {
                font-size: clamp(1.8rem, 8vw, 2.6rem);
            }
            .hero-search {
                flex-direction: column;
                border-radius: var(--radius-md);
                background: rgba(255, 255, 255, 0.06);
                padding: 6px;
            }
            .hero-search input {
                border-radius: var(--radius-md);
                padding: 12px 16px;
                text-align: center;
            }
            .hero-search button {
                border-radius: var(--radius-md);
                padding: 12px 16px;
                margin-top: 6px;
            }
            .hero-tags {
                gap: 8px;
            }
            .hero-tags a {
                font-size: 0.78rem;
                padding: 4px 14px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-col ul li a:hover {
                padding-left: 0;
            }
            .tag-cloud a {
                padding: 8px 18px;
                font-size: 0.82rem;
            }
            .rank-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .rank-item .rank-num {
                text-align: left;
                width: auto;
            }
            .feature-card {
                min-height: 240px;
            }
            .feature-card .feature-content h3 {
                font-size: 1.1rem;
            }
            .category-hero .hero-sub {
                font-size: 0.95rem;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-12 {
            margin-top: 12px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hidden {
            display: none !important;
        }