/* roulang page: index */
:root {
            --primary: #1a2b4a;
            --primary-light: #2c4068;
            --primary-dark: #12203a;
            --accent: #f0a500;
            --accent-light: #fbbf24;
            --accent-dark: #d18f00;
            --bg: #f5f7fa;
            --bg-alt: #eef1f6;
            --bg-dark: #0f1d35;
            --text: #1e293b;
            --text-light: #64748b;
            --text-muted: #94a3b8;
            --white: #ffffff;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.1);
            --shadow-accent: 0 6px 20px rgba(240, 165, 0, 0.2);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
            border: 0;
        }

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

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

        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: 1.25;
            font-weight: 700;
            color: var(--text);
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: var(--shadow-accent);
        }

        .btn-primary:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(240, 165, 0, 0.3);
        }

        .btn-outline {
            border-color: rgba(255, 255, 255, 0.5);
            color: var(--white);
            background: transparent;
        }

        .btn-outline:hover {
            border-color: var(--white);
            background: rgba(255, 255, 255, 0.1);
            color: var(--white);
            transform: translateY(-2px);
        }

        .btn-dark {
            background: var(--primary-dark);
            color: var(--white);
        }

        .btn-dark:hover {
            background: var(--primary);
            color: var(--white);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        .btn-lg {
            padding: 14px 40px;
            font-size: 16px;
            border-radius: var(--radius);
        }

        .btn:focus-visible {
            outline: 3px solid rgba(240, 165, 0, 0.4);
            outline-offset: 2px;
        }

        /* ===== 徽章/标签 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: var(--bg-alt);
            color: var(--text-light);
        }

        .badge-accent {
            background: rgba(240, 165, 0, 0.12);
            color: var(--accent-dark);
        }

        .badge-primary {
            background: rgba(26, 43, 74, 0.08);
            color: var(--primary);
        }

        .badge-new {
            background: rgba(240, 165, 0, 0.15);
            color: var(--accent-dark);
            font-size: 11px;
            padding: 3px 10px;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 18px;
            border-radius: 100px;
            background: var(--white);
            border: 1px solid var(--border);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            cursor: pointer;
            transition: all var(--transition);
        }

        .chip:hover {
            border-color: var(--accent);
            color: var(--accent-dark);
            box-shadow: 0 4px 12px rgba(240, 165, 0, 0.1);
        }

        .chip.active {
            background: var(--primary);
            border-color: var(--primary);
            color: var(--white);
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 12px rgba(0, 0, 0, 0.04);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
            transition: opacity var(--transition);
        }

        .logo:hover {
            opacity: 0.8;
            color: var(--primary-dark);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary-dark);
            font-weight: 800;
            box-shadow: var(--shadow-sm);
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--bg);
            padding: 4px;
            border-radius: 100px;
            border: 1px solid var(--border);
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 100px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(255, 255, 255, 0.7);
        }

        .nav-link.active {
            background: var(--white);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
            font-weight: 600;
        }

        .nav-cta {
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: var(--bg);
            cursor: pointer;
            color: var(--primary);
            font-size: 20px;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center center/cover no-repeat;
            min-height: 620px;
            display: flex;
            align-items: center;
            color: var(--white);
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 29, 53, 0.9) 0%, rgba(26, 43, 74, 0.75) 50%, rgba(15, 29, 53, 0.5) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            padding: 80px 0;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(8px);
            padding: 6px 18px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 24px;
        }

        .hero h1 {
            font-size: 56px;
            line-height: 1.1;
            color: var(--white);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .hero h1 .accent {
            color: var(--accent);
        }

        .hero-sub {
            font-size: 18px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            max-width: 560px;
        }

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

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }

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

        .stat-num {
            font-size: 30px;
            font-weight: 800;
            color: var(--white);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }

        /* ===== Ticker ===== */
        .ticker-bar {
            background: var(--primary-dark);
            color: var(--white);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            overflow: hidden;
            position: relative;
        }

        .ticker-track {
            display: flex;
            align-items: center;
            gap: 40px;
            padding: 12px 0;
            white-space: nowrap;
            animation: ticker 30s linear infinite;
        }

        .ticker-track span {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            opacity: 0.85;
        }

        .ticker-track span::before {
            content: '✦';
            color: var(--accent);
        }

        @keyframes ticker {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        /* ===== 区块通用 ===== */
        .section {
            padding: 100px 0;
        }

        .section-alt {
            background: var(--white);
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 38px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 8px;
        }

        .section-head p {
            color: var(--text-light);
            max-width: 480px;
            font-size: 15px;
        }

        .section-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            padding: 8px 18px;
            border-radius: 100px;
            background: var(--bg);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .section-link:hover {
            background: rgba(240, 165, 0, 0.12);
            color: var(--accent-dark);
            transform: translateX(2px);
        }

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

        .feature-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            position: relative;
            border: 1px solid var(--border);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), rgba(240, 165, 0, 0.3));
            opacity: 0;
            transition: opacity var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(240, 165, 0, 0.2);
        }

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

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius);
            background: linear-gradient(135deg, rgba(240, 165, 0, 0.12), rgba(240, 165, 0, 0.04));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
            border: 1px solid rgba(240, 165, 0, 0.15);
        }

        .feature-card h3 {
            font-size: 19px;
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        .feature-tag {
            display: inline-block;
            margin-top: 16px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-dark);
            background: rgba(240, 165, 0, 0.08);
            padding: 4px 12px;
            border-radius: 100px;
        }

        /* ===== 分类入口 ===== */
        .category-section {
            background: var(--white);
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: flex-end;
            background: var(--primary-dark);
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }

        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 29, 53, 0.1) 0%, rgba(15, 29, 53, 0.85) 100%);
            transition: all var(--transition);
        }

        .category-card:hover .category-overlay {
            background: linear-gradient(180deg, rgba(15, 29, 53, 0.05) 0%, rgba(15, 29, 53, 0.9) 100%);
        }

        .category-content {
            position: relative;
            z-index: 2;
            padding: 36px;
            width: 100%;
            color: var(--white);
        }

        .category-content h3 {
            font-size: 26px;
            color: var(--white);
            margin-bottom: 8px;
        }

        .category-content p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.6;
            max-width: 320px;
        }

        .category-arrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 14px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            transition: gap var(--transition);
        }

        .category-card:hover .category-arrow {
            gap: 12px;
        }

        /* ===== 最新资讯 ===== */
        .latest-section {
            background: var(--bg);
        }

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

        .latest-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
        }

        .latest-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(240, 165, 0, 0.25);
        }

        .latest-card-media {
            height: 180px;
            overflow: hidden;
            position: relative;
            background: var(--primary-dark);
        }

        .latest-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .latest-card:hover .latest-card-media img {
            transform: scale(1.06);
        }

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

        .latest-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }

        .latest-card-body h3 {
            font-size: 18px;
            line-height: 1.4;
            margin-bottom: 10px;
            transition: color var(--transition);
        }

        .latest-card-body h3:hover {
            color: var(--accent-dark);
        }

        .latest-card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
        }

        .latest-card-footer {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--bg);
            font-size: 13px;
            color: var(--text-muted);
        }

        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            background: var(--white);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
            color: var(--text-light);
            font-size: 15px;
        }

        /* ===== 热门精选横向滚动 ===== */
        .featured-section {
            background: var(--bg-dark);
            color: var(--white);
            overflow: hidden;
        }

        .featured-section .section-head h2 {
            color: var(--white);
        }

        .featured-section .section-head p {
            color: rgba(255, 255, 255, 0.6);
        }

        .featured-track {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            padding: 10px 4px 30px;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }

        .featured-track::-webkit-scrollbar {
            display: none;
        }

        .featured-card {
            min-width: 300px;
            max-width: 300px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            backdrop-filter: blur(10px);
        }

        .featured-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(240, 165, 0, 0.3);
            transform: translateY(-4px);
        }

        .featured-media {
            height: 160px;
            position: relative;
            overflow: hidden;
        }

        .featured-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .featured-media .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(15, 29, 53, 0.8);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .featured-body {
            padding: 20px;
        }

        .featured-body h3 {
            color: var(--white);
            font-size: 16px;
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .featured-body p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.5;
        }

        .featured-body .featured-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 12px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
        }

        .featured-body .featured-link:hover {
            gap: 10px;
        }

        /* ===== 流程/步骤 ===== */
        .process-section {
            background: var(--white);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
        }

        .process-step {
            text-align: center;
            padding: 32px 20px;
            border-radius: var(--radius-lg);
            background: var(--bg);
            border: 1px solid var(--border);
            position: relative;
            transition: all var(--transition);
        }

        .process-step:hover {
            background: var(--white);
            box-shadow: var(--shadow);
            border-color: rgba(240, 165, 0, 0.2);
        }

        .step-num {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary-dark);
            box-shadow: var(--shadow-accent);
        }

        .process-step h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        $.process-step .step-arrow {
            position: absolute;
            right: -20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--accent);
            font-size: 20px;
            z-index: 2;
        }

        .process-step:last-child .step-arrow {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(240, 165, 0, 0.25);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 28px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            transition: color var(--transition);
            position: relative;
        }

        .faq-question::after {
            content: '+';
            font-size: 24px;
            font-weight: 300;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-item.active .faq-question {
            color: var(--accent-dark);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 28px;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center center/cover no-repeat;
            padding: 100px 0;
            color: var(--white);
            overflow: hidden;
        }

        .cta-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 29, 53, 0.92), rgba(26, 43, 74, 0.8));
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            color: var(--white);
            font-size: 40px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            line-height: 1.7;
            margin-bottom: 32px;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 80px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 60px;
        }

        .footer-brand .logo {
            color: var(--white);
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
            line-height: 1.7;
        }

        .footer-col h4 {
            color: var(--white);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            transition: all var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom .domain {
            font-weight: 600;
            color: rgba(255, 255, 255, 0.6);
        }

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

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

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

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

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 24px;
            }

            .hero h1 {
                font-size: 42px;
            }

            .hero {
                min-height: 520px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 70px 0;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: var(--white);
                border-radius: 0;
                border: none;
                border-bottom: 1px solid var(--border);
                padding: 16px 20px;
                gap: 8px;
                transform: translateY(-120%);
                transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: var(--shadow-lg);
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .nav-link {
                border-radius: var(--radius-sm);
                padding: 12px 16px;
                font-size: 15px;
            }

            .nav-cta {
                display: none;
            }

            .hero {
                min-height: 460px;
            }

            .hero h1 {
                font-size: 34px;
            }

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

            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                margin-bottom: 32px;
            }

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

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

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

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

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

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

            .cta-content h2 {
                font-size: 30px;
            }

            .featured-card {
                min-width: 260px;
                max-width: 260px;
            }
        }

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

            .section {
                padding: 56px 0;
            }

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

            .hero h1 {
                font-size: 28px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

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

            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }

            .category-content {
                padding: 24px;
            }

            .category-content h3 {
                font-size: 22px;
            }

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

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .process-step {
                padding: 24px 16px;
            }

            .process-step .step-arrow {
                display: none;
            }

            .faq-question {
                padding: 18px 20px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 20px;
            }

            .faq-item.active .faq-answer {
                padding-bottom: 20px;
            }

            .featured-card {
                min-width: 220px;
                max-width: 220px;
            }
        }

/* roulang page: article */
:root {
    --primary: #f59e0b;
    --primary-dark: #d97706;
    --primary-light: #fef3c7;
    --secondary: #1e293b;
    --secondary-light: #475569;
    --bg: #f8fafc;
    --white: #ffffff;
    --text: #0f172a;
    --text-weak: #64748b;
    --border: #e2e8f0;
    --radius: 14px;
    --radius-sm: 8px;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 16px 40px rgba(15, 23, 42, 0.12);
    --transition: all 0.3s ease;
    --container: 1200px;
    --header-h: 76px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; font-size: 16px; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); height: var(--header-h); display: flex; align-items: center; }
.nav-container { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: 100%; }
.logo { display: inline-flex; align-items: center; gap: 8px; font-size: 22px; font-weight: 800; color: var(--secondary); letter-spacing: 0.5px; white-space: nowrap; }
.logo-icon { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; border-radius: 10px; font-weight: 900; font-size: 20px; box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3); }
.logo span { color: var(--primary); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link { padding: 8px 16px; border-radius: 999px; font-size: 15px; font-weight: 500; color: var(--secondary-light); transition: var(--transition); }
.nav-link:hover { background: var(--primary-light); color: var(--primary-dark); }
.nav-link.active { background: var(--primary); color: #fff; font-weight: 600; box-shadow: 0 4px 12px rgba(245, 158, 11, 0.28); }
.nav-cta { flex-shrink: 0; }
.nav-toggle { display: none; flex-direction: column; justify-content: center; align-items: center; width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--border); color: var(--secondary); background: var(--white); transition: var(--transition); }
.nav-toggle:hover { border-color: var(--primary); color: var(--primary); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 999px; font-weight: 600; transition: var(--transition); border: 2px solid transparent; }
.btn-primary { background: var(--primary); color: #fff; padding: 12px 28px; font-size: 15px; box-shadow: 0 4px 14px rgba(245, 158, 11, 0.32); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 22px rgba(217, 119, 6, 0.35); }
.btn-outline { background: transparent; color: var(--primary-dark); border-color: var(--primary); padding: 10px 24px; font-size: 14px; }
.btn-outline:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--secondary); padding: 12px 28px; font-size: 15px; box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18); }
.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn:focus-visible { outline: 3px solid rgba(245, 158, 11, 0.4); outline-offset: 2px; }

.article-hero { position: relative; background-size: cover; background-position: center; padding: 92px 0 72px; color: #fff; overflow: hidden; }
.article-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 41, 59, 0.72) 50%, rgba(245, 158, 11, 0.35) 100%); }
.article-hero .container { position: relative; z-index: 2; }
.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255, 255, 255, 0.8); margin-bottom: 20px; flex-wrap: wrap; }
.breadcrumb a { color: rgba(255, 255, 255, 0.85); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { opacity: 0.6; }
.article-hero h1 { font-size: clamp(28px, 4.5vw, 46px); font-weight: 800; line-height: 1.3; max-width: 860px; letter-spacing: 1px; }
.article-hero .article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 24px; font-size: 14px; color: rgba(255, 255, 255, 0.88); }
.article-hero .article-meta span { display: inline-flex; align-items: center; gap: 6px; }
.article-hero .meta-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(255, 255, 255, 0.12); border-radius: 999px; padding: 4px 14px; font-size: 13px; border: 1px solid rgba(255, 255, 255, 0.22); }

.article-section { padding: 64px 0 80px; }
.article-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 48px; align-items: start; }
.article-content { background: var(--white); border-radius: var(--radius); padding: 48px; box-shadow: var(--shadow); border: 1px solid var(--border); }
.article-content h2 { font-size: 26px; font-weight: 700; color: var(--secondary); margin: 32px 0 16px; padding-bottom: 12px; border-bottom: 2px solid var(--primary-light); }
.article-content h3 { font-size: 21px; font-weight: 700; color: var(--secondary); margin: 24px 0 12px; }
.article-content p { margin-bottom: 18px; font-size: 16px; line-height: 1.85; color: #334155; }
.article-content ul { margin-bottom: 18px; padding-left: 20px; }
.article-content ul li { position: relative; padding-left: 18px; margin-bottom: 8px; color: #334155; }
.article-content ul li::before { content: ""; position: absolute; left: 0; top: 11px; width: 7px; height: 7px; border-radius: 50%; background: var(--primary); }
.article-content ol { margin-bottom: 18px; padding-left: 24px; }
.article-content ol li { margin-bottom: 8px; color: #334155; list-style: decimal; }
.article-content blockquote { border-left: 4px solid var(--primary); background: var(--primary-light); padding: 18px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin-bottom: 22px; font-style: normal; color: #7c4a00; }
.article-content img { border-radius: var(--radius-sm); margin: 20px 0; box-shadow: var(--shadow); }
.not-found { text-align: center; padding: 60px 20px; }
.not-found h2 { font-size: 32px; color: var(--secondary); margin-bottom: 16px; border: none; padding: 0; }
.not-found p { color: var(--text-weak); margin-bottom: 28px; }
.not-found .btn { margin: 0 auto; }

.sidebar { display: flex; flex-direction: column; gap: 28px; position: sticky; top: calc(var(--header-h) + 24px); }
.sidebar-card { background: var(--white); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); border: 1px solid var(--border); }
.sidebar-title { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 700; color: var(--secondary); margin-bottom: 20px; }
.sidebar-title::before { content: ""; width: 4px; height: 18px; background: var(--primary); border-radius: 4px; }
.sidebar-cat { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.sidebar-cat a { position: relative; border-radius: var(--radius-sm); overflow: hidden; aspect-ratio: 4/3; display: flex; align-items: flex-end; padding: 14px; color: #fff; font-size: 15px; font-weight: 600; background-size: cover; background-position: center; transition: var(--transition); box-shadow: 0 4px 12px rgba(15, 23, 42, 0.18); }
.sidebar-cat a::before { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(15, 23, 42, 0.78), rgba(15, 23, 42, 0.12)); transition: var(--transition); }
.sidebar-cat a span { position: relative; z-index: 2; }
.sidebar-cat a:hover { transform: translateY(-3px); box-shadow: 0 8px 22px rgba(15, 23, 42, 0.22); }
.sidebar-latest { display: flex; flex-direction: column; }
.sidebar-latest li { border-bottom: 1px solid var(--border); }
.sidebar-latest li:last-child { border-bottom: none; }
.sidebar-latest li a { display: flex; flex-direction: column; gap: 4px; padding: 13px 0; transition: var(--transition); }
.sidebar-latest li a:hover { padding-left: 8px; }
.sidebar-latest .latest-title { font-size: 14px; font-weight: 600; color: var(--secondary); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sidebar-latest .latest-meta { font-size: 12px; color: var(--text-weak); }
.sidebar-latest li:last-child a { padding-bottom: 4px; }
.sidebar-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.sidebar-tags a { display: inline-block; padding: 6px 14px; border-radius: 999px; background: var(--bg); border: 1px solid var(--border); font-size: 13px; color: var(--secondary-light); transition: var(--transition); }
.sidebar-tags a:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary-dark); }
.sidebar-tip { background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%); }
.sidebar-tip p { font-size: 14px; line-height: 1.7; color: #78350f; margin-bottom: 16px; }
.sidebar-tip .btn { width: 100%; }

.related-section { padding: 72px 0; background: var(--white); border-top: 1px solid var(--border); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 36px; gap: 20px; flex-wrap: wrap; }
.section-title { font-size: clamp(22px, 3vw, 30px); font-weight: 800; color: var(--secondary); position: relative; padding-left: 18px; }
.section-title::before { content: ""; position: absolute; left: 0; top: 4px; bottom: 4px; width: 5px; border-radius: 4px; background: var(--primary); }
.section-sub { color: var(--text-weak); font-size: 15px; }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.related-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: var(--transition); box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04); }
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--primary); }
.related-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.related-body { padding: 20px; }
.related-body .badge { display: inline-block; padding: 4px 10px; background: var(--primary-light); color: var(--primary-dark); border-radius: 999px; font-size: 12px; font-weight: 600; margin-bottom: 10px; }
.related-body h3 { font-size: 16px; font-weight: 700; color: var(--secondary); line-height: 1.5; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-body p { font-size: 13px; color: var(--text-weak); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
.link-more { font-size: 13px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 4px; }
.link-more:hover { gap: 8px; color: var(--primary-dark); }

.faq-section { padding: 72px 0; background: var(--bg); }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.faq-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: var(--transition); }
.faq-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.faq-card h3 { display: flex; align-items: flex-start; gap: 12px; font-size: 16px; font-weight: 700; color: var(--secondary); margin-bottom: 10px; }
.faq-card h3::before { content: "Q"; display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; background: var(--primary); color: #fff; border-radius: 8px; font-size: 14px; font-weight: 800; flex-shrink: 0; }
.faq-card p { font-size: 14px; line-height: 1.75; color: var(--text-weak); padding-left: 38px; }

.cta-section { position: relative; padding: 88px 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; background-attachment: fixed; }
.cta-section::before { content: ""; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(217, 119, 6, 0.75) 100%); }
.cta-section .container { position: relative; z-index: 2; text-align: center; color: #fff; }
.cta-section h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; margin-bottom: 16px; letter-spacing: 1px; }
.cta-section p { font-size: 16px; color: rgba(255, 255, 255, 0.9); max-width: 640px; margin: 0 auto 32px; line-height: 1.8; }
.cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

.site-footer { background: #0f172a; color: rgba(255, 255, 255, 0.9); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, 0.6); max-width: 320px; margin-top: 12px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 20px; letter-spacing: 1px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 14px; color: rgba(255, 255, 255, 0.6); }
.footer-col ul li a:hover { color: var(--primary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 22px 0; font-size: 13px; color: rgba(255, 255, 255, 0.45); flex-wrap: wrap; gap: 8px; }
.footer-bottom .domain { letter-spacing: 1px; }

@media (max-width: 1024px) {
    .article-grid { grid-template-columns: 1fr; gap: 40px; }
    .sidebar { position: static; display: grid; grid-template-columns: 1fr 1fr; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    :root { --header-h: 64px; }
    .container { padding: 0 18px; }
    .main-nav { position: fixed; top: var(--header-h); left: 0; right: 0; background: var(--white); flex-direction: column; padding: 18px 24px; gap: 8px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); transform: translateY(-120%); opacity: 0; pointer-events: none; transition: var(--transition); z-index: 99; }
    .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .nav-link { width: 100%; text-align: center; padding: 12px; font-size: 16px; }
    .nav-toggle { display: flex; }
    .nav-cta { display: none; }
    .article-hero h1 { font-size: 26px; }
    .article-content { padding: 28px 22px; }
    .article-hero { padding: 68px 0 48px; }
    .article-section { padding: 40px 0 60px; }
    .faq-grid { grid-template-columns: 1fr; }
    .sidebar { grid-template-columns: 1fr; gap: 20px; }
    .related-grid { grid-template-columns: 1fr; }
    .cta-section { padding: 64px 0; background-attachment: scroll; }
    .cta-buttons .btn { width: 100%; padding: 13px 20px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; justify-content: center; }

}
@media (max-width: 520px) {
    .article-grid { gap: 28px; }
    .related-grid { grid-template-columns: 1fr; }
    .article-content h2 { font-size: 22px; }
    .article-content h3 { font-size: 18px; }
    .section-head { flex-direction: column; align-items: flex-start; }
    .breadcrumb { font-size: 13px; }
    .article-hero .article-meta { gap: 10px; flex-direction: column; align-items: flex-start; }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #eff6ff;
            --accent: #06b6d4;
            --accent-light: #ecfeff;
            --warning: #f59e0b;
            --text: #0f172a;
            --text-weak: #64748b;
            --text-mute: #94a3b8;
            --bg: #f4f7fb;
            --card-bg: #ffffff;
            --border: #e2e8f0;
            --border-light: #edf1f7;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06);
            --shadow-md: 0 8px 24px rgba(15, 23, 42, .07);
            --shadow-lg: 0 18px 40px rgba(15, 23, 42, .1);
            --shadow-primary: 0 8px 24px rgba(37, 99, 235, .25);
            --transition: .25s ease;
        }

        /* ========== 基础 Reset ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ========== 容器 ========== */
        .container {
            width: min(1200px, 92%);
            margin: 0 auto;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            border-radius: 999px;
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(37, 99, 235, .3);
        }
        .btn-outline {
            border: 1.5px solid rgba(255, 255, 255, .7);
            color: #fff;
            background: rgba(255, 255, 255, .1);
            backdrop-filter: blur(4px);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, .2);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 7px 16px;
            font-size: 14px;
        }
        .btn-lg {
            padding: 14px 34px;
            font-size: 16px;
        }
        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 3px;
        }

        /* ========== 徽章 / 标签 ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            line-height: 1.5;
            background: var(--primary-light);
            color: var(--primary);
        }
        .badge-warm {
            background: #fff7ed;
            color: #ea580c;
        }
        .badge-green {
            background: #ecfdf5;
            color: #059669;
        }

        /* ========== 顶部导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .86);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, .7);
        }
        .nav-container {
            display: flex;
            align-items: center;
            gap: 28px;
            height: 68px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 21px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: .5px;
            white-space: nowrap;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(37, 99, 235, .3);
        }
        .logo span:last-child {
            color: var(--primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: 10px;
            flex: 1;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 9px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            border-radius: 999px;
            position: relative;
            transition: all .25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 700;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 4px;
            height: 3px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }
        .nav-cta {
            margin-left: auto;
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            color: var(--text);
            border: 1px solid var(--border);
            background: #fff;
            transition: all .25s ease;
        }
        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .nav-toggle:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ========== 分类横幅 Hero ========== */
        .page-hero {
            position: relative;
            padding: 84px 0 56px;
            background: linear-gradient(100deg, rgba(15, 23, 42, .88), rgba(37, 99, 235, .72)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(6, 182, 212, .4), transparent 65%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
            margin-bottom: 20px;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb .sep {
            opacity: .5;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .25);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 18px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            color: #34d399;
        }
        .page-hero h1 {
            font-size: clamp(32px, 5vw, 48px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .page-hero p {
            max-width: 640px;
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .86);
            margin-bottom: 28px;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 14px;
            color: rgba(255, 255, 255, .8);
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* ========== 通用板块 ========== */
        .section {
            padding: 64px 0;
        }
        .section-tight {
            padding: 48px 0;
        }
        .section-head {
            display: flex;
            flex-wrap: wrap;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 32px;
        }
        .section-title-wrap {
            max-width: 680px;
        }
        .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 8px;
            letter-spacing: .5px;
        }
        .section-sub {
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.7;
        }
        .section-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 999px;
            background: var(--primary-light);
        }
        .section-link:hover {
            background: var(--primary);
            color: #fff;
            transform: translateX(4px);
        }

        /* ========== 标签筛选 ========== */
        .filter-bar {
            background: #fff;
            border-bottom: 1px solid var(--border);
        }
        .filter-inner {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 18px 0;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .filter-inner::-webkit-scrollbar {
            display: none;
        }
        .chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-weak);
            background: var(--bg);
            border: 1px solid transparent;
            border-radius: 999px;
            transition: all .25s ease;
            white-space: nowrap;
        }
        .chip i {
            font-size: 13px;
        }
        .chip:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .chip.active {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-primary);
        }

        /* ========== 动态资讯区 ========== */
        .updates-section {
            background: #fff;
        }
        .updates-grid {
            display: grid;
            grid-template-columns: 1.05fr 1fr;
            gap: 28px;
            align-items: start;
        }
        .feature-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: transform .3s ease, box-shadow .3s ease;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .feature-card img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }
        .feature-overlay {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            padding: 32px 24px 20px;
            background: linear-gradient(180deg, transparent, rgba(15, 23, 42, .88));
            color: #fff;
        }
        .feature-overlay .badge {
            margin-bottom: 10px;
        }
        .feature-overlay h3 {
            font-size: 22px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .feature-overlay p {
            font-size: 14px;
            color: rgba(255, 255, 255, .8);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .feature-date {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, .75);
        }
        .update-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            background: #fafcfe;
            overflow: hidden;
        }
        .update-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 16px 18px;
            border-bottom: 1px solid var(--border-light);
            transition: background .25s ease;
        }
        .update-item:last-child {
            border-bottom: none;
        }
        .update-item:hover {
            background: #f0f5ff;
        }
        .update-item .icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            background: var(--primary-light);
            color: var(--primary);
            flex-shrink: 0;
        }
        .update-info {
            flex: 1;
            min-width: 0;
        }
        .update-info h4 {
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 3px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .update-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-mute);
        }
        .update-meta .tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 2px 8px;
            border-radius: 6px;
        }
        .update-date {
            font-size: 13px;
            color: var(--text-mute);
            white-space: nowrap;
            flex-shrink: 0;
        }

        /* ========== 热门榜单 ========== */
        .rank-section {
            background: linear-gradient(135deg, #0f172a, #172554);
            color: #fff;
            padding: 60px 0;
        }
        .rank-section .section-title {
            color: #fff;
        }
        .rank-section .section-sub {
            color: rgba(255, 255, 255, .6);
        }
        .rank-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 32px;
        }
        .rank-list {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius);
            padding: 20px;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 13px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .rank-item:last-child {
            border-bottom: none;
        }
        .rank-num {
            width: 30px;
            height: 30px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            background: rgba(255, 255, 255, .1);
            color: rgba(255, 255, 255, .7);
            flex-shrink: 0;
        }
        .rank-item:nth-child(1) .rank-num {
            background: linear-gradient(135deg, #f59e0b, #f97316);
            color: #fff;
        }
        .rank-item:nth-child(2) .rank-num {
            background: linear-gradient(135deg, #94a3b8, #64748b);
            color: #fff;
        }
        .rank-item:nth-child(3) .rank-num {
            background: linear-gradient(135deg, #d97706, #b45309);
            color: #fff;
        }
        .rank-content {
            flex: 1;
            min-width: 0;
        }
        .rank-content h4 {
            font-size: 15px;
            font-weight: 600;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .rank-content p {
            font-size: 13px;
            color: rgba(255, 255, 255, .55);
            margin-top: 2px;
        }
        .rank-item:hover h4 {
            color: var(--accent);
        }

        /* ========== 时间线 ========== */
        .timeline-section {
            background: var(--bg);
        }
        .timeline {
            position: relative;
            max-width: 860px;
            margin: 0 auto;
            padding-left: 24px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            border-radius: 2px;
            background: linear-gradient(180deg, var(--primary), var(--accent), transparent);
        }
        .timeline-item {
            position: relative;
            padding: 20px 0 20px 28px;
            border-bottom: 1px solid var(--border-light);
        }
        .timeline-item:last-child {
            border-bottom: none;
        }
        .timeline-dot {
            position: absolute;
            left: -24px;
            top: 27px;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: #fff;
            border: 4px solid var(--primary);
            box-shadow: 0 0 0 4px rgba(37, 99, 235, .12);
        }
        .timeline-dot.accent {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(6, 182, 212, .12);
        }
        .timeline-date {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 12px;
            border-radius: 999px;
            margin-bottom: 8px;
        }
        .timeline-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text);
        }
        .timeline-item p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            max-width: 640px;
        }

        /* ========== 专题横向滚动 ========== */
        .topic-section {
            background: #fff;
        }
        .topic-scroll {
            margin: 0 -12px;
            padding: 4px 12px 16px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            scrollbar-width: thin;
            scrollbar-color: var(--primary) transparent;
        }
        .topic-scroll::-webkit-scrollbar {
            height: 8px;
        }
        .topic-scroll::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 8px;
        }
        .scroll-track {
            display: flex;
            gap: 20px;
            min-width: min-content;
        }
        .topic-card {
            width: 300px;
            flex-shrink: 0;
            scroll-snap-align: start;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: transform .3s ease, box-shadow .3s ease;
        }
        .topic-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }
        .topic-cover {
            height: 170px;
            overflow: hidden;
            position: relative;
        }
        .topic-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .topic-card:hover .topic-cover img {
            transform: scale(1.06);
        }
        .topic-cover .topic-count {
            position: absolute;
            right: 12px;
            bottom: 12px;
            background: rgba(15, 23, 42, .7);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            backdrop-filter: blur(4px);
        }
        .topic-body {
            padding: 16px 18px 18px;
        }
        .topic-body h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }
        .topic-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
        }
        .topic-more {
            display: flex;
            align-items: center;
            gap: 5px;
            margin-top: 12px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        /* ========== 数据统计 ========== */
        .stats-section {
            position: relative;
            padding: 70px 0;
            background: linear-gradient(90deg, rgba(2, 10, 30, .88), rgba(37, 99, 235, .8)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 24px;
            position: relative;
            z-index: 2;
        }
        .stat-card {
            text-align: center;
            padding: 34px 20px;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .14);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(6px);
            transition: transform .3s ease, background .3s ease;
        }
        .stat-card:hover {
            transform: translateY(-4px);
            background: rgba(255, 255, 255, .14);
        }
        .stat-num {
            font-size: clamp(30px, 4vw, 44px);
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(135deg, #fff, #7dd3fc);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .stat-label {
            margin-top: 8px;
            font-size: 15px;
            color: rgba(255, 255, 255, .75);
            font-weight: 500;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg);
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 22px 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .25s ease, transform .25s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            cursor: pointer;
            position: relative;
        }
        .faq-question i:first-child {
            width: 30px;
            height: 30px;
            border-radius: 8px;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
        }
        .faq-answer {
            padding: 12px 0 0 42px;
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 76px 0;
            position: relative;
            background: linear-gradient(90deg, rgba(15, 23, 42, .92), rgba(6, 182, 212, .75)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            text-align: center;
            color: #fff;
        }
        .cta-box {
            position: relative;
            z-index: 2;
        }
        .cta-box h2 {
            font-size: clamp(26px, 4vw, 38px);
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-box p {
            font-size: 16px;
            color: rgba(255, 255, 255, .8);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0d1321;
            color: #fff;
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 340px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            transition: color .25s ease, padding-left .25s ease;
        }
        .footer-col ul a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            padding: 22px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, .45);
        }
        .footer-bottom .domain {
            color: rgba(255, 255, 255, .6);
            font-weight: 500;
        }

        /* ========== 焦点状态 ========== */
        a:focus-visible,
        .faq-question:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

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

        @media (max-width: 768px) {
            .nav-container {
                gap: 14px;
            }
            .main-nav {
                display: none;
                position: fixed;
                top: 68px;
                left: 16px;
                right: 16px;
                background: #fff;
                border-radius: var(--radius);
                box-shadow: var(--shadow-lg);
                padding: 14px;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
                z-index: 200;
                border: 1px solid var(--border);
            }
            .main-nav.open {
                display: flex;
            }
            .nav-link {
                padding: 13px 16px;
                font-size: 16px;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
                margin-left: auto;
            }
            .page-hero {
                padding: 56px 0 40px;
            }
            .section {
                padding: 48px 0;
            }
            .updates-grid {
                gap: 20px;
            }
            .feature-card img {
                height: 250px;
            }
            .filter-inner {
                padding: 14px 0;
            }
            .timeline-item {
                padding-left: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .hero-meta {
                flex-direction: column;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 18px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 17px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-card {
                padding: 26px 14px;
            }
            .stat-num {
                font-size: 30px;
            }
            .update-item {
                padding: 13px 14px;
            }
            .update-info h4 {
                font-size: 14px;
            }
            .update-date {
                font-size: 12px;
            }
            .topic-card {
                width: 260px;
            }
            .faq-question {
                font-size: 16px;
            }
            .faq-answer {
                padding-left: 4px;
                padding-top: 10px;
            }
            .cta-btns .btn {
                width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-head {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang page: category2 */
/* ========== Design Variables ========== */
        :root {
            --primary: #4f46e5;
            --primary-dark: #3730a3;
            --primary-light: #eef2ff;
            --accent: #f97316;
            --accent-soft: #fff7ed;
            --bg: #f8fafc;
            --bg-deep: #0f172a;
            --surface: #ffffff;
            --text: #1e293b;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 40px rgba(79, 70, 229, 0.12);
            --space-section: 80px;
            --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        /* ========== Reset & Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ========== Container ========== */
        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 8px rgba(15, 23, 42, 0.04);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--text);
            white-space: nowrap;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), #7c3aed);
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }
        .logo span {
            color: var(--primary);
            font-weight: 800;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-link {
            padding: 9px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            border-radius: 999px;
            transition: all 0.25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            color: var(--text);
            background: var(--border-light);
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: var(--border);
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 999px;
            transition: all 0.25s ease;
            cursor: pointer;
            line-height: 1.4;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #7c3aed);
            color: #fff;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
        }
        .btn-primary:hover {
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border);
            color: var(--text);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent), #fbbf24);
            color: #fff;
            box-shadow: 0 4px 16px rgba(249, 115, 22, 0.25);
        }
        .btn-accent:hover {
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.35);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.4);
            outline-offset: 2px;
        }

        /* ========== Hero ========== */
        .page-hero {
            position: relative;
            padding: 96px 0 80px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-color: var(--bg-deep);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.65) 50%, rgba(79, 70, 229, 0.4) 100%);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-sub {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 999px;
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-sub i {
            color: #fbbf24;
        }
        .page-hero h1 {
            font-size: 44px;
            line-height: 1.3;
            color: #fff;
            font-weight: 800;
            margin-bottom: 18px;
            max-width: 620px;
            letter-spacing: -0.5px;
        }
        .page-hero h1 em {
            font-style: normal;
            color: #fbbf24;
        }
        .hero-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 540px;
            margin-bottom: 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 56px;
            max-width: 560px;
        }
        .hero-stat {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            text-align: center;
            backdrop-filter: blur(8px);
            transition: background 0.25s;
        }
        .hero-stat:hover {
            background: rgba(255, 255, 255, 0.18);
        }
        .hero-stat .num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        /* ========== Section Common ========== */
        .section {
            padding: var(--space-section) 0;
        }
        .section-alt {
            background: var(--surface);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 40px;
        }
        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.35;
            letter-spacing: -0.5px;
        }
        .section-head h2 span {
            color: var(--primary);
        }
        .section-head p {
            color: var(--text-weak);
            font-size: 15px;
            max-width: 360px;
        }
        .section-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
            padding: 8px 16px;
            border-radius: 999px;
            background: var(--primary-light);
            transition: all 0.2s;
        }
        .section-link:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ========== Filter Chips ========== */
        .chip-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 32px;
        }
        .chip {
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-weak);
            cursor: pointer;
            transition: all 0.25s;
        }
        .chip:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .chip.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
        }

        /* ========== Guide Cards ========== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .guide-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: rgba(79, 70, 229, 0.2);
        }
        .card-img {
            position: relative;
            overflow: hidden;
            height: 220px;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .guide-card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.3), transparent 60%);
        }
        .card-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(4px);
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .card-body {
            padding: 26px 24px 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            flex: 1;
        }
        .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
        }
        .card-body h3 a {
            transition: color 0.2s;
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            color: var(--text-weak);
            font-size: 14.5px;
            line-height: 1.7;
            flex: 1;
        }
        .card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
            margin-top: auto;
        }
        .card-meta {
            font-size: 13px;
            color: var(--text-weak);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-link i {
            transition: transform 0.2s;
        }
        .card-link:hover i {
            transform: translateX(4px);
        }

        /* ========== Steps ========== */
        .steps-section {
            background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), #7c3aed);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }
        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ========== Horizontal Scroll ========== */
        .hscroll-section {
            background: var(--surface);
        }
        .hscroll-wrap {
            overflow-x: auto;
            padding-bottom: 16px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            display: flex;
            gap: 20px;
            margin: 0 -4px;
            padding-left: 4px;
            padding-right: 4px;
        }
        .hscroll-wrap::-webkit-scrollbar {
            height: 6px;
        }
        .hscroll-wrap::-webkit-scrollbar-track {
            background: var(--border-light);
            border-radius: 10px;
        }
        .hscroll-wrap::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 10px;
        }
        .hscroll-card {
            flex: 0 0 300px;
            scroll-snap-align: start;
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s;
        }
        .hscroll-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .hscroll-card .hc-img {
            height: 170px;
            overflow: hidden;
            position: relative;
        }
        .hscroll-card .hc-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .hscroll-card:hover .hc-img img {
            transform: scale(1.06);
        }
        .hc-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(4px);
            color: #fff;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 999px;
        }
        .hc-body {
            padding: 20px;
        }
        .hc-body h3 {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 8px;
        }
        .hc-body h3 a:hover {
            color: var(--primary);
        }
        .hc-body p {
            font-size: 13.5px;
            color: var(--text-weak);
            line-height: 1.6;
        }

        /* ========== Rank List ========== */
        .rank-section {
            background: var(--bg);
        }
        .rank-layout {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 32px;
            align-items: start;
        }
        .rank-panel {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }
        .rank-header {
            padding: 22px 28px;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 12px;
            background: linear-gradient(135deg, var(--primary-light), #fff);
        }
        .rank-header i {
            font-size: 22px;
            color: var(--primary);
        }
        .rank-header h3 {
            font-size: 18px;
            font-weight: 700;
        }
        .rank-list {
            padding: 8px 0;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 17px 28px;
            border-bottom: 1px solid var(--border-light);
            transition: background 0.2s;
        }
        .rank-item:last-child {
            border-bottom: none;
        }
        .rank-item:hover {
            background: var(--primary-light);
        }
        .rank-no {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--bg);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
            color: var(--text-weak);
            flex-shrink: 0;
        }
        .rank-item:nth-child(1) .rank-no {
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            color: #fff;
            border: none;
        }
        .rank-item:nth-child(2) .rank-no {
            background: linear-gradient(135deg, #94a3b8, #64748b);
            color: #fff;
            border: none;
        }
        .rank-item:nth-child(3) .rank-no {
            background: linear-gradient(135deg, #d97706, #b45309);
            color: #fff;
            border: none;
        }
        .rank-info {
            flex: 1;
        }
        .rank-info h4 {
            font-size: 15.5px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .rank-info h4 a:hover {
            color: var(--primary);
        }
        .rank-meta {
            font-size: 13px;
            color: var(--text-weak);
        }
        .rank-hit {
            font-size: 13px;
            color: var(--text-weak);
            white-space: nowrap;
        }
        .rank-hit i {
            color: var(--accent);
            margin-right: 2px;
        }

        /* sidebar card */
        .side-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 28px;
        }
        .side-card .side-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 20px;
        }
        .side-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .side-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--surface);
        }
        .faq-grid {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color 0.3s;
        }
        .faq-item:hover {
            border-color: rgba(79, 70, 229, 0.3);
        }
        .faq-item details {
            padding: 0;
        }
        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::before {
            content: '';
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            margin-left: auto;
            color: var(--text-weak);
            font-size: 14px;
            transition: transform 0.3s;
        }
        .faq-item details[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 22px 48px;
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-color: var(--bg-deep);
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(79, 70, 229, 0.9), rgba(15, 23, 42, 0.85));
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .cta-inner h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .cta-inner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand .logo span {
            color: #a5b4fc;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
            margin-top: 12px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--primary), #7c3aed);
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: all 0.2s;
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 6px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom .domain {
            font-weight: 500;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ========== Back to top ========== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: var(--shadow-md);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
        }
        .back-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .rank-layout {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 56px;
            }
            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                gap: 8px;
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.3s ease;
                z-index: 999;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-link {
                padding: 14px 18px;
                border-radius: var(--radius-sm);
                text-align: center;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .page-hero {
                padding: 72px 0 56px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .hero-desc {
                font-size: 16px;
            }
            .hero-stats {
                grid-template-columns: 1fr;
                max-width: 100%;
                gap: 10px;
            }
            .hero-stat {
                padding: 14px;
                display: flex;
                align-items: center;
                justify-content: space-between;
            }
            .hero-stat .num {
                font-size: 22px;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .cta-inner h2 {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .back-top {
                width: 40px;
                height: 40px;
                right: 20px;
                bottom: 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .card-img {
                height: 180px;
            }
            .card-body {
                padding: 20px 18px;
            }
            .card-body h3 {
                font-size: 18px;
            }
            .rank-item {
                padding: 14px 18px;
                flex-wrap: wrap;
            }
            .rank-hit {
                margin-left: auto;
            }
        }