/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #4f46e5;
            --primary-dark: #4338ca;
            --primary-light: #eef2ff;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --bg-dark: #0f172a;
            --bg-gray: #f1f5f9;
            --text: #1e293b;
            --text-light: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-dark: #cbd5e1;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.10);
            --shadow-primary: 0 8px 32px rgba(79, 70, 229, 0.22);
            --space: 80px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Segoe UI', sans-serif;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 20px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--primary);
            white-space: nowrap;
            transition: opacity 0.2s;
        }
        .logo:hover {
            opacity: 0.85;
        }
        .logo-dot {
            width: 32px;
            height: 32px;
            border-radius: 9px;
            background: linear-gradient(135deg, var(--primary), #8b5cf6);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            box-shadow: var(--shadow-primary);
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            transition: all 0.22s ease;
            line-height: 1.4;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            background: var(--primary);
            border-radius: 999px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            transition: all 0.25s 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 36px rgba(79, 70, 229, 0.30);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.20);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.30);
            backdrop-filter: blur(8px);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.24);
            border-color: rgba(255, 255, 255, 0.50);
            transform: translateY(-2px);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--border);
        }
        .btn-light:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            border-radius: 10px;
        }
        .btn:focus-visible,
        .nav-link:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            border-radius: 8px;
        }
        .mobile-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .mobile-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 74px;
            left: 0;
            right: 0;
            background: #fff;
            padding: 20px 28px 28px;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 16px 40px rgba(15, 23, 42, 0.10);
            z-index: 99;
            flex-direction: column;
            gap: 8px;
            max-height: calc(100vh - 74px);
            overflow-y: auto;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-link {
            padding: 14px 16px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            border-radius: 12px;
            transition: all 0.2s;
        }
        .mobile-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mobile-link.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 640px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            isolation: isolate;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.65) 50%, rgba(79, 70, 229, 0.35) 100%);
            z-index: -1;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(transparent, var(--bg));
            z-index: -1;
        }
        .hero-content {
            max-width: 720px;
            padding: 100px 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.20);
            border-radius: 999px;
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            backdrop-filter: blur(8px);
            margin-bottom: 24px;
        }
        .hero-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #34d399;
            box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.20);
        }
        .hero-title {
            font-size: 50px;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 18px;
        }
        .hero-title .highlight {
            color: #a5b4fc;
        }
        .hero-subtitle {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.80);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-meta {
            display: flex;
            gap: 32px;
            margin-top: 56px;
            flex-wrap: wrap;
        }
        .hero-meta-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .hero-meta-num {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
        }
        .hero-meta-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.60);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-light {
            background: #fff;
        }
        .section-gray {
            background: var(--bg-gray);
        }
        .section-dark {
            background: var(--bg-dark);
        }
        .section-head {
            max-width: 760px;
            margin-bottom: 52px;
        }
        .section-head-center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .section-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text);
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== 核心优势卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .feature-card::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 100px;
            height: 100px;
            border-radius: 0 0 0 100%;
            background: radial-gradient(circle at top right, var(--primary-light), transparent 70%);
            opacity: 0.6;
            transition: opacity 0.3s;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--border-dark);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), #8b5cf6);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 22px;
            margin-bottom: 20px;
            box-shadow: var(--shadow-primary);
        }
        .feature-icon.green {
            background: linear-gradient(135deg, #10b981, #34d399);
            box-shadow: 0 8px 24px rgba(16, 185, 129, 0.20);
        }
        .feature-icon.amber {
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.20);
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.7;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            background: #fff;
            transition: all 0.3s ease;
            display: block;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .category-card .cover {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .category-card .cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.55), transparent 70%);
        }
        .category-body {
            padding: 24px 24px 28px;
        }
        .category-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-body p {
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            transition: gap 0.2s;
        }
        .category-card:hover .category-link {
            gap: 10px;
        }

        /* ===== 资讯列表 ===== */
        .latest-wrap {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 40px;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-card {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
            transition: all 0.2s;
        }
        .news-card:last-child {
            border-bottom: none;
        }
        .news-card:hover {
            padding-left: 8px;
        }
        .news-index {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 700;
        }
        .news-info {
            flex: 1;
            min-width: 0;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 4px;
        }
        .news-cat {
            display: inline-flex;
            align-items: center;
            padding: 2px 10px;
            background: var(--accent-light);
            color: #92400e;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
        }
        .news-time {
            font-size: 13px;
            color: var(--text-muted);
        }
        .news-info h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 4px;
        }
        .news-info h3 a:hover {
            color: var(--primary);
        }
        .news-info p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .empty-tip {
            padding: 40px;
            text-align: center;
            color: var(--text-muted);
            font-size: 15px;
            background: var(--bg-gray);
            border-radius: var(--radius);
        }

        /* ===== 热门榜单 ===== */
        .rank-panel {
            background: linear-gradient(135deg, var(--bg-dark), #1e293b);
            border-radius: var(--radius-lg);
            padding: 32px;
            color: #fff;
        }
        .rank-panel h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .rank-panel h3 .icon {
            width: 32px;
            height: 32px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.12);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
        }
        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            border-radius: 12px;
            transition: background 0.2s;
            cursor: pointer;
        }
        .rank-item:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .rank-num {
            font-size: 18px;
            font-weight: 800;
            color: rgba(255, 255, 255, 0.40);
            width: 30px;
            text-align: center;
            flex-shrink: 0;
        }
        .rank-item:nth-child(1) .rank-num,
        .rank-item:nth-child(2) .rank-num,
        .rank-item:nth-child(3) .rank-num {
            color: var(--accent);
        }
        .rank-title {
            flex: 1;
            font-size: 14px;
            font-weight: 500;
            line-height: 1.5;
        }
        .rank-tag {
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.10);
            color: rgba(255, 255, 255, 0.70);
            white-space: nowrap;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            text-align: center;
            transition: all 0.3s;
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .stat-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-light);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all 0.25s;
        }
        .faq-item:hover {
            border-color: var(--border-dark);
        }
        .faq-item details {
            padding: 0;
        }
        .faq-item summary {
            list-style: none;
            cursor: pointer;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: color 0.2s;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 22px;
            font-weight: 400;
            color: var(--text-muted);
            transition: transform 0.3s;
            flex-shrink: 0;
        }
        .faq-item details[open] summary {
            color: var(--primary);
        }
        .faq-item details[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 100px 0;
            position: relative;
            background-size: cover;
            background-position: center;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.82);
            z-index: -1;
        }
        .cta-inner {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-title {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .cta-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.70);
        }
        .footer-inner {
            padding: 64px 0 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 280px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.40);
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1024px) {
            .features-grid,
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .latest-wrap {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .nav-link {
                padding: 8px 10px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .header-inner {
                height: 64px;
            }
            .nav-left,
            .nav-right .nav-link {
                display: none;
            }
            .nav-right .btn {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .mobile-menu {
                top: 64px;
            }
            .logo {
                font-size: 17px;
            }
            .hero {
                min-height: 520px;
            }
            .hero-content {
                padding: 64px 0;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-meta {
                gap: 20px;
                margin-top: 36px;
            }
            .hero-meta-num {
                font-size: 22px;
            }
            .section-title {
                font-size: 28px;
            }
            .features-grid,
            .category-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-card {
                padding: 24px 16px;
            }
            .stat-num {
                font-size: 30px;
            }
            .cta-section {
                padding: 72px 0;
            }
            .cta-title {
                font-size: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .features-grid,
            .category-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .news-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .rank-panel {
                padding: 24px 20px;
            }
            .section-title {
                font-size: 24px;
            }
        }

/* roulang page: category1 */
:root{
  --primary:#1d4ed8;
  --primary-dark:#1e40af;
  --primary-deep:#1e3a8a;
  --accent:#f59e0b;
  --accent-light:#fbbf24;
  --bg:#f8fafc;
  --bg-light:#f1f5f9;
  --dark:#0f172a;
  --text:#1e293b;
  --text-light:#64748b;
  --border:#e2e8f0;
  --radius-lg:16px;
  --radius-md:10px;
  --radius-sm:6px;
  --shadow-sm:0 2px 10px rgba(15,23,42,.06);
  --shadow-md:0 8px 30px rgba(15,23,42,.08);
  --shadow-lg:0 16px 48px rgba(15,23,42,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  font-size:16px;
}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit;transition:color .25s ease}
ul,ol{list-style:none;margin:0;padding:0}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  box-shadow:0 2px 20px rgba(15,23,42,.04);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;gap:20px;position:relative;
}
.logo{
  display:flex;align-items:center;gap:10px;
  font-weight:800;font-size:1.25rem;color:var(--primary-deep);
  letter-spacing:.5px;flex-shrink:0;
}
.logo-dot{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:10px;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#fff;font-size:1rem;font-weight:900;letter-spacing:.5px;
  box-shadow:0 4px 14px rgba(30,64,175,.35);
}
.nav-left,.nav-right{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;
  font-size:.94rem;font-weight:500;color:var(--text);
  padding:8px 14px;border-radius:8px;
  transition:background .2s,color .2s;
}
.nav-link:hover{color:var(--primary);background:rgba(29,78,216,.06)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::after{
  content:'';position:absolute;bottom:0;left:14px;right:14px;height:2px;
  background:var(--primary);border-radius:2px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:600;border-radius:8px;transition:all .25s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#fff;padding:10px 22px;font-size:.95rem;
  box-shadow:0 4px 16px rgba(30,64,175,.3);
}
.btn-primary:hover{
  transform:translateY(-1px);
  box-shadow:0 8px 24px rgba(30,64,175,.4);
  color:#fff;
}
.btn-accent{
  background:linear-gradient(135deg,var(--accent-light),var(--accent));
  color:#78350f;padding:12px 28px;font-size:1rem;
  box-shadow:0 6px 20px rgba(245,158,11,.3);
}
.btn-accent:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 28px rgba(245,158,11,.4);
  color:#78350f;
}
.btn-outline{
  background:transparent;color:#fff;
  border:1.5px solid rgba(255,255,255,.7);
  padding:10px 22px;font-size:.95rem;
}
.btn-outline:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm{padding:7px 16px;font-size:.85rem}
.mobile-toggle{
  display:none;flex-direction:column;gap:5px;
  padding:8px;border-radius:8px;background:rgba(29,78,216,.06);
}
.mobile-toggle span{
  display:block;width:20px;height:2px;background:var(--primary-deep);
  border-radius:2px;transition:all .3s ease;
}
.mobile-menu{
  display:none;
  background:#fff;border-top:1px solid var(--border);
  padding:16px 24px 20px;
  box-shadow:0 12px 32px rgba(15,23,42,.08);
}
.mobile-menu.open{display:block}
.mobile-menu .nav-link{
  display:block;padding:12px 8px;font-size:1rem;
  border-bottom:1px solid var(--bg-light);
}
.mobile-menu .nav-link:last-child{border-bottom:none}
.mobile-menu .btn{margin-top:12px;width:100%;display:flex;justify-content:center}

/* ===== Hero ===== */
.page-hero{
  position:relative;padding:100px 0 80px;
  background:linear-gradient(135deg,rgba(15,23,42,.88),rgba(30,58,138,.84)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color:#fff;overflow:hidden;
}
.page-hero::after{
  content:'';position:absolute;bottom:-60px;right:-40px;
  width:300px;height:300px;border-radius:50%;
  background:rgba(251,191,36,.08);filter:blur(60px);
}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
  color:#f0f9ff;font-size:.85rem;font-weight:500;
  padding:6px 16px;border-radius:50px;backdrop-filter:blur(8px);
}
.hero-title{
  font-size:2.6rem;line-height:1.25;font-weight:800;margin:20px 0 16px;
  letter-spacing:1px;
}
.hero-subtitle{
  font-size:1.12rem;color:rgba(255,255,255,.85);
  max-width:640px;margin-bottom:28px;line-height:1.8;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-meta{
  display:flex;gap:24px;margin-top:40px;flex-wrap:wrap;
}
.hero-meta-item{display:flex;align-items:center;gap:8px;font-size:.9rem;color:rgba(255,255,255,.75)}

/* ===== Section ===== */
.section{padding:80px 0}
.section-light{background:var(--bg-light)}
.section-white{background:#fff}
.section-head{
  text-align:center;max-width:680px;margin:0 auto 50px;
}
.section-eyebrow{
  display:inline-block;font-size:.85rem;font-weight:600;color:var(--primary);
  background:rgba(29,78,216,.08);padding:6px 16px;border-radius:50px;
  margin-bottom:14px;letter-spacing:1px;
}
.section-title{font-size:2rem;font-weight:800;color:var(--text);line-height:1.3;margin-bottom:14px}
.section-desc{color:var(--text-light);font-size:1rem;line-height:1.8}

/* ===== Steps ===== */
.steps-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  counter-reset:steps;
}
.step-card{
  position:relative;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:36px 24px 28px;
  transition:transform .3s ease,box-shadow .3s ease;
  counter-increment:steps;
}
.step-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
}
.step-num{
  font-size:2.2rem;font-weight:900;color:rgba(29,78,216,.15);
  line-height:1;margin-bottom:14px;
}
.step-card h3{font-size:1.15rem;font-weight:700;margin-bottom:10px}
.step-card p{font-size:.92rem;color:var(--text-light);line-height:1.8}
.step-icon{
  width:48px;height:48px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(29,78,216,.1),rgba(29,78,216,.05));
  color:var(--primary);font-size:1.3rem;margin-bottom:18px;
}
.step-line{
  position:absolute;top:70px;right:-24px;width:24px;height:2px;
  background:linear-gradient(90deg,var(--primary),transparent);
}
.step-card:last-child .step-line{display:none}

/* ===== Guide Content ===== */
.guide-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.guide-img{
  border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow-lg);position:relative;
}
.guide-img img{width:100%;object-fit:cover;min-height:320px}
.guide-img::after{
  content:'';position:absolute;inset:0;border-radius:var(--radius-lg);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.1);
}
.guide-content h3{font-size:1.5rem;font-weight:800;margin-bottom:16px;line-height:1.4}
.guide-content p{color:var(--text-light);margin-bottom:16px;line-height:1.9}
.guide-list{margin:20px 0}
.guide-list li{
  display:flex;align-items:flex-start;gap:10px;padding:8px 0;
  font-size:.98rem;color:var(--text);
}
.guide-list li i{color:var(--accent);margin-top:4px}
.guide-stat{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px;
}
.guide-stat-item{
  background:var(--bg);border:1px solid var(--border);
  border-radius:var(--radius-md);padding:16px;text-align:center;
}
.guide-stat-item strong{display:block;font-size:1.5rem;font-weight:800;color:var(--primary)}
.guide-stat-item span{font-size:.85rem;color:var(--text-light)}

/* ===== Cards ===== */
.cards-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:28px;
}
.card-item{
  background:#fff;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--border);
  transition:transform .3s ease,box-shadow .3s ease;
}
.card-item:hover{
  transform:translateY(-6px);box-shadow:var(--shadow-lg);
}
.card-img{position:relative;overflow:hidden;aspect-ratio:16/10}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card-item:hover .card-img img{transform:scale(1.05)}
.card-tag{
  position:absolute;top:14px;left:14px;z-index:2;
  background:rgba(15,23,42,.72);color:#fff;
  font-size:.78rem;padding:4px 12px;border-radius:50px;
  backdrop-filter:blur(6px);letter-spacing:.5px;
}
.card-body{padding:24px}
.card-body h3{font-size:1.1rem;font-weight:700;margin-bottom:8px;line-height:1.4}
.card-body p{font-size:.9rem;color:var(--text-light);line-height:1.75;margin-bottom:14px}
.card-footer{
  display:flex;justify-content:space-between;align-items:center;
  border-top:1px solid var(--bg-light);padding-top:14px;
}
.card-footer span{font-size:.85rem;color:var(--text-light)}
.card-link{
  font-size:.88rem;font-weight:600;color:var(--primary);
  display:inline-flex;align-items:center;gap:6px;
  transition:gap .2s ease;
}
.card-link:hover{gap:10px;color:var(--primary-deep)}

/* ===== Stats ===== */
.stats-section{
  background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 100%);
  color:#fff;padding:0;
}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-left:1px solid rgba(255,255,255,.12);
}
.stat-item{
  padding:60px 32px;text-align:center;
  border-right:1px solid rgba(255,255,255,.12);
}
.stat-item i{font-size:2rem;color:var(--accent-light);margin-bottom:12px}
.stat-item strong{
  display:block;font-size:2.4rem;font-weight:900;letter-spacing:1px;
  margin-bottom:4px;
}
.stat-item span{font-size:.9rem;color:rgba(255,255,255,.7)}

/* ===== FAQ ===== */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--border);
  border-radius:var(--radius-md);margin-bottom:14px;
  overflow:hidden;transition:box-shadow .3s ease;
}
.faq-item:hover{box-shadow:var(--shadow-md)}
.faq-question{
  width:100%;display:flex;justify-content:space-between;align-items:center;
  padding:20px 24px;font-size:1rem;font-weight:600;text-align:left;
  background:#fff;color:var(--text);
  transition:color .2s ease;
}
.faq-question i{
  color:var(--primary);font-size:1rem;transition:transform .3s ease;
  flex-shrink:0;margin-left:16px;
}
.faq-item.open .faq-question i{transform:rotate(180deg)}
.faq-question:hover{color:var(--primary)}
.faq-answer{
  max-height:0;overflow:hidden;transition:max-height .4s ease;
}
.faq-answer-inner{
  padding:0 24px 22px;color:var(--text-light);font-size:.95rem;line-height:1.85;
  border-top:1px solid var(--bg-light);padding-top:16px;
  margin:0 24px 0;
}
.faq-answer-inner{padding-left:0;padding-right:0;margin-left:24px;margin-right:24px;margin-bottom:20px}

/* ===== CTA ===== */
.cta-section{
  background:linear-gradient(135deg,#1e3a8a,#2563eb),url('/assets/images/backpic/back-2.png') center/cover;
  background-blend-mode:multiply;
  padding:80px 0;position:relative;overflow:hidden;
}
.cta-section::before{
  content:'';position:absolute;top:-100px;left:-100px;
  width:350px;height:350px;border-radius:50%;
  background:rgba(251,191,36,.12);filter:blur(80px);
}
.cta-inner{text-align:center;position:relative;z-index:2}
.cta-inner h2{font-size:2.2rem;font-weight:800;color:#fff;margin-bottom:16px}
.cta-inner p{color:rgba(255,255,255,.85);font-size:1.08rem;max-width:560px;margin:0 auto 32px;line-height:1.8}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* ===== Footer ===== */
.site-footer{background:#0f172a;color:#94a3b8;padding:70px 0 0;font-size:.92rem}
.footer-inner{display:flex;flex-direction:column;gap:40px;padding-bottom:40px}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;
}
.footer-brand .logo{color:#fff;font-size:1.15rem;margin-bottom:16px}
.footer-brand .logo .logo-dot{background:linear-gradient(135deg,#f59e0b,#d97706);color:#0f172a;box-shadow:0 4px 14px rgba(245,158,11,.3)}
.footer-brand p{color:#64748b;line-height:1.8;max-width:320px}
.footer-col h4{
  color:#f1f5f9;font-size:1rem;font-weight:600;margin-bottom:18px;
  letter-spacing:.5px;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{color:#94a3b8;font-size:.92rem;transition:color .2s ease;position:relative;padding-left:0}
.footer-col ul a::before{
  content:'›';margin-right:6px;color:var(--accent);opacity:.6;
}
.footer-col ul a:hover{color:#fff;padding-left:4px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0 26px;
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:12px;font-size:.86rem;color:#64748b;
}
.footer-bottom .footer-links{display:flex;gap:18px}
.footer-bottom .footer-links a{color:#64748b;font-size:.86rem}
.footer-bottom .footer-links a:hover{color:#fff}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .cards-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .nav-left .nav-link,.nav-right .nav-link{display:none}
  .nav-right .btn{display:none}
  .mobile-toggle{display:flex}
  .nav-left{display:none}
  .nav-right{display:none}
  .mobile-menu .nav-link,.mobile-menu .btn{display:flex}
  .header-inner{justify-content:space-between}
  .mobile-menu{display:none}
  .mobile-menu.open{display:block}
  .mobile-menu .nav-link{display:flex;align-items:center;justify-content:center;border-bottom:none}
  .mobile-menu .nav-left,.mobile-menu .nav-right{
    display:flex;flex-direction:column;align-items:center;gap:2px;
  }
}
@media (max-width:768px){
  .page-hero{padding:70px 0 56px}
  .hero-title{font-size:2rem}
  .hero-subtitle{font-size:1rem}
  .section{padding:56px 0}
  .section-title{font-size:1.6rem}
  .guide-grid{grid-template-columns:1fr;gap:32px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat-item{padding:36px 20px}
  .stat-item strong{font-size:1.8rem}
  .cta-inner h2{font-size:1.6rem}
  .footer-bottom{flex-direction:column;text-align:center}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .logo{font-size:1rem;gap:6px}
  .logo-dot{width:32px;height:32px;font-size:.85rem;border-radius:8px}
  .header-inner{height:64px}
  .steps-grid{grid-template-columns:1fr}
  .cards-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero-actions{flex-direction:column;width:100%}
  .hero-actions .btn{width:100%}
  .cta-actions{flex-direction:column;width:100%}
  .cta-actions .btn{width:100%}
  .stats-grid{grid-template-columns:1fr 1fr}
}

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --brand-primary: #2563eb;
            --brand-secondary: #10b981;
            --brand-dark: #0b1120;
            --brand-accent: #f59e0b;
            --text-main: #1f2937;
            --text-weak: #6b7280;
            --border-color: #e5e7eb;
            --bg-light: #f8fafc;
            --bg-muted: #f1f5f9;
            --radius: 12px;
            --shadow-sm: 0 2px 12px rgba(2, 6, 23, .06);
            --shadow-md: 0 6px 28px rgba(2, 6, 23, .09);
            --shadow-lg: 0 16px 48px rgba(2, 6, 23, .14);
            --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
        }

        /* ===== 基础 Reset ===== */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background: #fff;
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s;
        }
        img {
            max-width: 100%;
            display: block;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
            background: transparent;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(15, 23, 42, .92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            box-shadow: 0 2px 24px rgba(2, 6, 23, .18);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 1rem;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: .35rem;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .nav-link {
            display: inline-block;
            padding: .38rem .7rem;
            border-radius: 999px;
            font-size: .89rem;
            font-weight: 500;
            color: #e2e8f0;
            white-space: nowrap;
            transition: background .25s, color .25s;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, .1);
            color: #fff;
        }
        .nav-link.active {
            background: rgba(37, 99, 235, .24);
            color: #93c5fd;
            box-shadow: inset 0 0 0 1px rgba(59, 130, 246, .25);
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            font-size: 1.12rem;
            font-weight: 700;
            color: #fff;
            white-space: nowrap;
            letter-spacing: .02em;
        }
        .logo-dot {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, #2563eb, #10b981);
            color: #fff;
            font-size: .82rem;
            font-weight: 800;
            box-shadow: 0 4px 16px rgba(37, 99, 235, .45);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .45rem;
            padding: .62rem 1.35rem;
            border-radius: 999px;
            font-size: .92rem;
            font-weight: 600;
            line-height: 1.2;
            cursor: pointer;
            transition: all .25s;
            border: 1px solid transparent;
        }
        .btn-primary {
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
            color: #fff;
            box-shadow: 0 4px 18px rgba(37, 99, 235, .35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, .48);
        }
        .btn-light {
            background: #fff;
            color: #0f172a;
            box-shadow: 0 4px 18px rgba(2, 6, 23, .14);
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(2, 6, 23, .2);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .5);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .12);
        }
        .btn-sm {
            padding: .42rem 1rem;
            font-size: .82rem;
        }
        .btn-block {
            width: 100%;
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: .5rem;
            border-radius: 8px;
            cursor: pointer;
        }
        .mobile-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: all .3s;
        }

        /* ===== 文章横幅 ===== */
        .article-hero {
            position: relative;
            padding: 4.8rem 0 4rem;
            background: linear-gradient(140deg, rgba(2, 6, 23, .96), rgba(37, 99, 235, .82)), url('/assets/images/backpic/back-1.png') no-repeat center/cover;
            color: #fff;
            overflow: hidden;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            width: 320px;
            height: 320px;
            right: -80px;
            top: -80px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(16, 185, 129, .35), transparent 70%);
            pointer-events: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: .4rem;
            align-items: center;
            font-size: .82rem;
            color: rgba(255, 255, 255, .65);
            margin-bottom: 1.5rem;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, .75);
        }
        .breadcrumb a:hover {
            color: #93c5fd;
        }
        .breadcrumb .sep {
            opacity: .5;
        }
        .article-hero .category-badge {
            display: inline-flex;
            align-items: center;
            gap: .35rem;
            background: rgba(255, 255, 255, .16);
            border: 1px solid rgba(255, 255, 255, .25);
            color: #e2e8f0;
            padding: .3rem .85rem;
            border-radius: 999px;
            font-size: .78rem;
            font-weight: 500;
            margin-bottom: .9rem;
            backdrop-filter: blur(6px);
        }
        .article-hero h1 {
            font-size: clamp(1.55rem, 3.2vw, 2.4rem);
            line-height: 1.3;
            font-weight: 800;
            max-width: 780px;
            margin-bottom: 1rem;
            letter-spacing: .01em;
        }
        .article-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.4rem;
            font-size: .84rem;
            color: rgba(255, 255, 255, .7);
        }
        .article-hero-meta i {
            margin-right: .4rem;
            color: #93c5fd;
        }

        /* ===== 文章详情 ===== */
        .article-detail-section {
            padding: 3.5rem 0 4.5rem;
            background: var(--bg-light);
        }
        .article-detail-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 2rem;
            align-items: start;
        }
        .article-main-card {
            background: #fff;
            border-radius: 18px;
            box-shadow: var(--shadow-md);
            overflow: hidden;
            border: 1px solid rgba(2, 6, 23, .04);
        }
        .article-cover-wrap {
            position: relative;
            aspect-ratio: 16 / 8;
            overflow: hidden;
            background: #e2e8f0;
        }
        .article-cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .article-cover-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(2, 6, 23, .2));
        }
        .article-body {
            padding: 2.2rem 2.4rem 1.6rem;
        }
        .article-content {
            font-size: 1.02rem;
            color: #374151;
            line-height: 1.9;
        }
        .article-content p {
            margin-bottom: 1.15rem;
        }
        .article-content h2 {
            font-size: 1.42rem;
            color: #0f172a;
            margin: 1.8rem 0 .7rem;
            padding-top: .6rem;
            border-top: 1px solid #f1f5f9;
        }
        .article-content h3 {
            font-size: 1.2rem;
            color: #1e293b;
            margin: 1.4rem 0 .5rem;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.1rem;
            padding-left: 1.4rem;
        }
        .article-content li {
            margin-bottom: .35rem;
            position: relative;
        }
        .article-content ul li::before {
            content: '';
            position: absolute;
            left: -1rem;
            top: .65em;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand-primary);
        }
        .article-content ol {
            counter-reset: ol;
        }
        .article-content ol li {
            counter-increment: ol;
        }
        .article-content ol li::before {
            content: counter(ol) ".";
            position: absolute;
            left: -1.1rem;
            color: var(--brand-primary);
            font-weight: 600;
        }
        .article-content blockquote {
            border-left: 4px solid var(--brand-primary);
            background: #f0f6ff;
            padding: .9rem 1.2rem;
            border-radius: 0 10px 10px 0;
            margin: 1.2rem 0;
            color: #1e293b;
        }
        .article-content img {
            border-radius: 12px;
            margin: 1.2rem 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content a {
            color: var(--brand-primary);
            font-weight: 500;
            border-bottom: 1px solid rgba(37, 99, 235, .3);
        }
        .article-content a:hover {
            border-bottom-color: var(--brand-primary);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: .5rem;
            padding: 1.2rem 2.4rem 1.6rem;
            border-top: 1px solid #f1f5f9;
        }
        .tag {
            display: inline-block;
            padding: .28rem .8rem;
            border-radius: 999px;
            background: #f1f5f9;
            border: 1px solid #e2e8f0;
            font-size: .78rem;
            color: #475569;
            transition: background .2s, color .2s;
        }
        .tag:hover {
            background: #eff6ff;
            color: var(--brand-primary);
            border-color: #bfdbfe;
        }

        /* 侧边栏 */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
            position: sticky;
            top: 96px;
        }
        .sidebar-card {
            background: #fff;
            border: 1px solid rgba(2, 6, 23, .05);
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: .9rem;
            padding-bottom: .6rem;
            border-bottom: 2px solid #f1f5f9;
            display: flex;
            align-items: center;
            gap: .45rem;
        }
        .sidebar-card h3 i {
            color: var(--brand-primary);
        }
        .sidebar-card ul {
            display: flex;
            flex-direction: column;
            gap: .45rem;
        }
        .sidebar-card li {
            font-size: .85rem;
            color: #4b5563;
        }
        .sidebar-card li span {
            color: #9ca3af;
            margin-right: .25rem;
        }
        .sidebar-cta {
            background: linear-gradient(160deg, #0f172a, #1e3a8a);
            color: #fff;
            border: none;
        }
        .sidebar-cta h3 {
            color: #fff;
            border-bottom-color: rgba(255, 255, 255, .2);
        }
        .sidebar-cta p {
            font-size: .85rem;
            color: rgba(255, 255, 255, .75);
            margin-bottom: 1rem;
        }

        /* ===== 推荐阅读 ===== */
        .related-section {
            padding: 4rem 0;
            background: #fff;
        }
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 1.8rem;
            gap: 1rem;
        }
        .section-eyebrow {
            display: block;
            font-size: .76rem;
            font-weight: 600;
            letter-spacing: .1em;
            text-transform: uppercase;
            color: var(--brand-primary);
            margin-bottom: .15rem;
        }
        .section-head h2 {
            font-size: 1.65rem;
            font-weight: 800;
            color: #0f172a;
            line-height: 1.3;
        }
        .section-link {
            font-size: .86rem;
            color: var(--brand-primary);
            font-weight: 600;
            white-space: nowrap;
        }
        .section-link:hover {
            color: #1e40af;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }
        .related-card {
            background: #fff;
            border: 1px solid rgba(2, 6, 23, .06);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform .28s, box-shadow .28s;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }
        .related-img {
            aspect-ratio: 16 / 10;
            background: #e2e8f0;
            overflow: hidden;
        }
        .related-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }
        .related-card:hover .related-img img {
            transform: scale(1.04);
        }
        .related-body {
            padding: 1.1rem 1.2rem 1.2rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-body .related-tagline {
            display: block;
            font-size: .72rem;
            font-weight: 600;
            color: var(--brand-primary);
            margin-bottom: .3rem;
            letter-spacing: .03em;
        }
        .related-body h3 {
            font-size: .98rem;
            font-weight: 700;
            color: #0f172a;
            line-height: 1.55;
            margin-bottom: .35rem;
        }
        .related-body p {
            font-size: .82rem;
            color: var(--text-weak);
            line-height: 1.6;
            flex: 1;
        }
        .related-link {
            margin-top: .7rem;
            font-size: .8rem;
            font-weight: 600;
            color: var(--brand-primary);
        }
        .related-link i {
            margin-left: .2rem;
            transition: transform .25s;
        }
        .related-card:hover .related-link i {
            transform: translateX(3px);
        }

        /* ===== CTA 区块 ===== */
        .cta-block {
            padding: 4rem 0;
            background: linear-gradient(145deg, rgba(2, 6, 23, .95), rgba(29, 78, 216, .85)), url('/assets/images/backpic/back-2.png') no-repeat center/cover;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -60px;
            left: 50%;
            transform: translateX(-50%);
            width: 480px;
            height: 200px;
            background: radial-gradient(circle, rgba(16, 185, 129, .45), transparent 70%);
            pointer-events: none;
        }
        .cta-block h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: .6rem;
        }
        .cta-block p {
            font-size: .98rem;
            color: rgba(255, 255, 255, .75);
            max-width: 520px;
            margin: 0 auto 1.6rem;
        }
        .cta-block .btn-light {
            margin: 0 .3rem;
        }
        .cta-block .btn-outline-light {
            margin: 0 .3rem;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 4rem 0;
            background: #f8fafc;
        }
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
            max-width: 960px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid rgba(2, 6, 23, .06);
            border-radius: 14px;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow .25s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item details {
            padding: 0;
        }
        .faq-item summary {
            cursor: pointer;
            list-style: none;
            padding: 1.1rem 1.3rem;
            font-weight: 600;
            font-size: .94rem;
            color: #0f172a;
            position: relative;
            display: flex;
            align-items: center;
            gap: .6rem;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            margin-left: auto;
            font-size: 1.2rem;
            color: var(--brand-primary);
            font-weight: 700;
            transition: transform .25s;
        }
        .faq-item details[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-item summary .faq-num {
            display: inline-flex;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: #eff6ff;
            color: var(--brand-primary);
            font-size: .72rem;
            font-weight: 700;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .faq-item .faq-answer {
            padding: 0 1.3rem 1.15rem 2.4rem;
            font-size: .86rem;
            color: #475569;
            line-height: 1.75;
        }

        /* ===== 内容未找到 ===== */
        .not-found {
            text-align: center;
            padding: 3.5rem 1.5rem;
        }
        .not-found i {
            font-size: 2.5rem;
            color: #cbd5e1;
            margin-bottom: 1rem;
        }
        .not-found h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #1f2937;
            margin-bottom: .5rem;
        }
        .not-found p {
            color: #64748b;
            font-size: .92rem;
            margin-bottom: 1.4rem;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0b1120;
            color: #94a3b8;
            padding-top: 3.5rem;
            border-top: 1px solid rgba(255, 255, 255, .06);
        }
        .footer-inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand .logo {
            font-size: 1.08rem;
            margin-bottom: .8rem;
        }
        .footer-brand p {
            font-size: .84rem;
            line-height: 1.7;
            max-width: 280px;
            color: #64748b;
        }
        .footer-col h4 {
            font-size: .92rem;
            color: #e2e8f0;
            font-weight: 600;
            margin-bottom: .8rem;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: .4rem;
        }
        .footer-col li a {
            font-size: .84rem;
            color: #94a3b8;
        }
        .footer-col li a:hover {
            color: #93c5fd;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: .8rem;
            padding: 1.4rem 0 1.6rem;
            font-size: .8rem;
            color: #64748b;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }
            .nav-left,
            .nav-right {
                display: none;
                flex-direction: column;
                align-items: stretch;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #0f172a;
                padding: 1rem 1.25rem;
                gap: .4rem;
                border-bottom: 1px solid rgba(255, 255, 255, .08);
                box-shadow: 0 12px 30px rgba(2, 6, 23, .25);
            }
            .site-header.mobile-open .nav-left,
            .site-header.mobile-open .nav-right {
                display: flex;
            }
            .nav-right {
                top: auto;
                border-top: none;
            }
            .site-header.mobile-open .nav-left {
                top: 64px;
            }
            .site-header.mobile-open .nav-right {
                top: 64px;
                padding-top: 0;
            }
            .nav-link {
                padding: .7rem 1rem;
                font-size: .95rem;
                border-radius: 10px;
            }
            .mobile-toggle {
                display: flex;
            }
            .article-detail-grid {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .sidebar-card {
                flex: 1 1 220px;
            }
            .article-body {
                padding: 1.5rem 1.3rem 1.2rem;
            }
            .article-tags {
                padding: .9rem 1.3rem 1.1rem;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .cta-block h2 {
                font-size: 1.45rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .article-hero {
                padding: 3rem 0 2.4rem;
            }
            .article-hero h1 {
                font-size: 1.35rem;
            }
            .article-hero-meta {
                gap: .7rem;
                font-size: .76rem;
            }
            .section-head {
                align-items: flex-start;
                flex-direction: column;
            }
        }

        /* 焦点可访问性 */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(59, 130, 246, .45);
            outline-offset: 2px;
            border-radius: 6px;
        }

/* roulang page: category2 */
:root {
            --primary: #4f46e5;
            --primary-dark: #3730a3;
            --primary-light: #818cf8;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg: #f8fafc;
            --bg-dark: #0f172a;
            --surface: #ffffff;
            --surface-soft: #f1f5f9;
            --text: #1e293b;
            --text-weak: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 6px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
            outline: none;
        }

        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 80px 0;
        }

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

        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-tag {
            display: inline-block;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(245, 158, 11, 0.1));
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            padding: 6px 18px;
            border-radius: 100px;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .section-title {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 17px;
            color: var(--text-weak);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.8;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 700;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: 100px;
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
            color: #fff;
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }

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

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

        .btn-lg {
            padding: 15px 40px;
            font-size: 17px;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.5);
            outline-offset: 2px;
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
        }

        .header-inner {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
            height: 76px;
            gap: 20px;
        }

        .nav-left {
            display: flex;
            align-items: center;
            gap: 4px;
            justify-self: start;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 4px;
            justify-self: end;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            padding: 8px 16px;
            border-radius: 100px;
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(79, 70, 229, 0.08);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(79, 70, 229, 0.12);
            font-weight: 700;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 1px;
            white-space: nowrap;
        }

        .logo-dot {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 800;
            letter-spacing: 0;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            padding: 10px;
            border-radius: 10px;
            background: var(--surface-soft);
            border: 1px solid var(--border);
            transition: var(--transition);
            justify-self: end;
        }

        .mobile-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }

        .mobile-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .mobile-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .mobile-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: 76px;
            left: 0;
            right: 0;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
            z-index: 999;
        }

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

        .mobile-menu .nav-link {
            padding: 14px 16px;
            font-size: 16px;
            border-radius: 12px;
            display: block;
        }

        .mobile-menu .btn {
            margin-top: 12px;
            width: 100%;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 120px 0 100px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.86), rgba(79, 70, 229, 0.72));
            z-index: 1;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 8px 22px;
            border-radius: 100px;
            margin-bottom: 28px;
            backdrop-filter: blur(6px);
        }

        .hero-title {
            font-size: 54px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-subtitle {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

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

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 56px;
            flex-wrap: wrap;
        }

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

        .hero-stat-number {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        /* ===== 标签筛选 ===== */
        .tags-section {
            padding: 50px 0;
            background: var(--bg);
            border-bottom: 1px solid var(--border);
        }

        .tags-wrap {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: 100px;
            border: 1px solid var(--border);
            background: var(--surface);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-weak);
            transition: var(--transition);
            cursor: pointer;
        }

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

        .tag-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
        }

        .tag-btn .tag-count {
            background: rgba(255, 255, 255, 0.2);
            padding: 2px 8px;
            border-radius: 100px;
            font-size: 12px;
        }

        .tag-btn.active .tag-count {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ===== 排行榜 ===== */
        .rank-section {
            padding: 80px 0;
            background: var(--surface);
        }

        .rank-layout {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 56px;
            align-items: start;
        }

        .rank-intro {}

        .rank-intro h3 {
            font-size: 28px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 20px;
        }

        .rank-intro p {
            color: var(--text-weak);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .rank-features {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .rank-feature {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 16px;
            background: var(--surface-soft);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
        }

        .rank-feature-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-size: 17px;
        }

        .rank-feature h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .rank-feature p {
            font-size: 14px;
            color: var(--text-weak);
            margin: 0;
            line-height: 1.6;
        }

        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            transition: var(--transition);
            cursor: pointer;
        }

        .rank-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: rgba(79, 70, 229, 0.3);
        }

        .rank-num {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            background: var(--surface-soft);
            color: var(--text-weak);
        }

        .rank-item:nth-child(1) .rank-num {
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            color: #fff;
            box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
        }

        .rank-item:nth-child(2) .rank-num {
            background: linear-gradient(135deg, #94a3b8, #cbd5e1);
            color: #fff;
            box-shadow: 0 4px 12px rgba(148, 163, 184, 0.3);
        }

        .rank-item:nth-child(3) .rank-num {
            background: linear-gradient(135deg, #b45309, #d97706);
            color: #fff;
            box-shadow: 0 4px 12px rgba(180, 83, 9, 0.3);
        }

        .rank-img {
            flex-shrink: 0;
            width: 72px;
            height: 72px;
            border-radius: 12px;
            object-fit: cover;
            overflow: hidden;
            background: var(--surface-soft);
        }

        .rank-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .rank-item:hover .rank-img img {
            transform: scale(1.08);
        }

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

        .rank-name {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .rank-meta {
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 6px;
        }

        .rank-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .rank-tag {
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 100px;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
        }

        .rank-score {
            flex-shrink: 0;
            text-align: right;
        }

        .rank-score-number {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
        }

        .rank-score-label {
            font-size: 12px;
            color: var(--text-light);
        }

        .rank-hot {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, #ef4444, #f97316);
            padding: 2px 10px;
            border-radius: 100px;
            margin-top: 4px;
        }

        /* ===== 游戏卡片 ===== */
        .game-section {
            padding: 80px 0;
            background: var(--bg);
        }

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

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

        .game-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, 0.3);
        }

        .game-card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--surface-soft);
        }

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

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

        .game-card-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            font-size: 12px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            padding: 4px 14px;
            border-radius: 100px;
            box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
        }

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

        .game-card-title {
            font-size: 19px;
            font-weight: 800;
            margin-bottom: 10px;
            transition: var(--transition);
        }

        .game-card:hover .game-card-title {
            color: var(--primary);
        }

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

        .game-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }

        .game-card-rate {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }

        .game-card-link {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .game-card-link:hover {
            color: var(--primary-dark);
        }

        /* ===== 攻略区块 ===== */
        .guide-section {
            padding: 80px 0;
            background: var(--surface);
        }

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

        .guide-card {
            padding: 32px;
            background: linear-gradient(145deg, var(--surface), var(--surface-soft));
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            transition: var(--transition);
            text-align: center;
        }

        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(79, 70, 229, 0.25);
        }

        .guide-icon {
            width: 68px;
            height: 68px;
            margin: 0 auto 20px;
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-size: 26px;
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.3);
        }

        .guide-card h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .guide-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .guide-link {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .guide-link:hover {
            color: var(--primary-dark);
        }

        /* ===== 数据区块 ===== */
        .stats-section {
            padding: 80px 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(79, 70, 229, 0.82));
        }

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

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat-item {
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-4px);
        }

        .stat-num {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            line-height: 1;
            margin-bottom: 12px;
        }

        .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--bg);
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

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

        .faq-item:hover {
            border-color: rgba(79, 70, 229, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: left;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            background: transparent;
            gap: 16px;
            transition: var(--transition);
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
            font-size: 18px;
            transition: var(--transition);
        }

        .faq-item.active .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            display: none;
            padding: 0 24px 20px;
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

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

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--surface);
        }

        .cta-box {
            background: linear-gradient(135deg, #1e1b4b, #312e81);
            border-radius: 28px;
            padding: 72px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 300px;
            height: 300px;
            background: rgba(79, 70, 229, 0.4);
            border-radius: 50%;
            filter: blur(80px);
        }

        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 240px;
            height: 240px;
            background: rgba(245, 158, 11, 0.3);
            border-radius: 50%;
            filter: blur(80px);
        }

        .cta-box>* {
            position: relative;
            z-index: 1;
        }

        .cta-title {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

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

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: #94a3b8;
            padding: 60px 0 0;
        }

        .footer-inner {
            padding-bottom: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 48px;
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #94a3b8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-col a {
            font-size: 14px;
            color: #94a3b8;
            transition: var(--transition);
            display: inline-block;
        }

        .footer-col a:hover {
            color: #fff;
            transform: translateX(4px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #64748b;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .section {
                padding: 60px 0;
            }

            .section-title {
                font-size: 30px;
            }

            .hero {
                padding: 100px 0 80px;
            }

            .hero-title {
                font-size: 44px;
            }

            .rank-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }

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

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

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

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .header-inner {
                grid-template-columns: 1fr auto 1fr;
            }

            .logo {
                justify-self: center;
                font-size: 18px;
                gap: 8px;
            }

            .logo-dot {
                width: 32px;
                height: 32px;
                font-size: 12px;
            }

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

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

            .hero-stats {
                gap: 24px;
            }

            .hero-stat-number {
                font-size: 24px;
            }

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

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

            .cta-box {
                padding: 48px 24px;
            }

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

            .section-title {
                font-size: 26px;
            }
        }

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

            .hero {
                padding: 80px 0 60px;
            }

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

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

            .btn-lg {
                width: 100%;
                text-align: center;
            }

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

            .stat-num {
                font-size: 32px;
            }

            .stat-item {
                padding: 24px 12px;
            }

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

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

            .rank-item {
                padding: 14px;
                gap: 12px;
            }

            .rank-img {
                width: 56px;
                height: 56px;
            }

            .rank-name {
                font-size: 15px;
            }

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

/* roulang page: category3 */
:root {
            --primary: #4f46e5;
            --primary-dark: #4338ca;
            --secondary: #f59e0b;
            --ink: #0f172a;
            --soft: #f8fafc;
            --line: #e2e8f0;
            --radius: 16px;
            --shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
        }
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            background: #ffffff;
            color: var(--ink);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a { text-decoration: none; color: inherit; }
        img { max-width: 100%; display: block; }
        ul { list-style: none; padding: 0; margin: 0; }

        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* ========== Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            transition: box-shadow 0.3s;
        }
        .site-header.scrolled { box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--ink);
            white-space: nowrap;
            letter-spacing: 0.5px;
        }
        .logo-dot {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            color: #fff;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 900;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: #475569;
            transition: all 0.2s;
            white-space: nowrap;
        }
        .nav-link:hover { background: #f1f5f9; color: var(--ink); }
        .nav-link.active {
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            font-weight: 600;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.25s;
            line-height: 1.2;
        }
        .btn-primary {
            background: linear-gradient(135deg, #4f46e5, #6d28d9);
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4); }
        .btn-primary:active { transform: translateY(0); }
        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .btn-outline:hover { border-color: #fff; background: rgba(255, 255, 255, 0.1); }
        .btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 8px; }
        .btn-lg { padding: 14px 32px; font-size: 16px; border-radius: 12px; }
        .btn-light { background: #fff; color: var(--primary); box-shadow: 0 4px 16px rgba(0,0,0,0.15); }
        .btn-light:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
        }
        .mobile-toggle span {
            width: 22px;
            height: 2px;
            background: var(--ink);
            border-radius: 2px;
            transition: all 0.3s;
        }
        .mobile-menu {
            display: none;
            background: #fff;
            padding: 0;
            border-top: 1px solid var(--line);
            box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
        }
        .mobile-menu.open { display: block; }
        .mobile-menu .nav-link { display: block; padding: 14px 24px; border-bottom: 1px solid #f1f5f9; border-radius: 0; }
        .mobile-menu .btn { margin: 16px 24px; width: calc(100% - 48px); }

        /* ========== Page Banner ========== */
        .page-banner {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4f46e5 100%);
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.25), transparent 70%);
            border-radius: 50%;
        }
        .page-banner .container { position: relative; z-index: 2; }
        .page-banner .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            backdrop-filter: blur(8px);
            margin-bottom: 20px;
        }
        .page-banner h1 {
            color: #fff;
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            margin: 0 0 16px;
            letter-spacing: 1px;
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            max-width: 600px;
            margin: 0;
        }
        .banner-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
        }
        .banner-stats .stat {
            color: #fff;
        }
        .banner-stats .stat-num {
            font-size: 32px;
            font-weight: 800;
            line-height: 1;
            color: #fbbf24;
        }
        .banner-stats .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }

        /* ========== Section ========== */
        .section { padding: 72px 0; }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 36px;
        }
        .section-header .tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            background: rgba(79, 70, 229, 0.08);
            padding: 4px 12px;
            border-radius: 6px;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            margin: 0;
            line-height: 1.25;
            letter-spacing: 0.5px;
        }
        .section-header .sub {
            color: #64748b;
            font-size: 14px;
            margin-top: 8px;
        }
        .section-header .more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            white-space: nowrap;
        }
        .section-header .more-link:hover { color: var(--primary-dark); }
        .section-header .more-link i { font-size: 12px; transition: transform 0.2s; }
        .section-header .more-link:hover i { transform: translateX(4px); }

        /* ========== Filter Tags ========== */
        .filter-bar {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            padding: 16px 20px;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 14px;
            box-shadow: var(--shadow);
            margin-bottom: 36px;
        }
        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: #475569;
            background: #f8fafc;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all 0.2s;
        }
        .filter-tag:hover { background: #f1f5f9; color: var(--ink); }
        .filter-tag.active {
            background: linear-gradient(135deg, #4f46e5, #6d28d9);
            color: #fff;
            border-color: transparent;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }
        .filter-tag i { font-size: 12px; }

        /* ========== Activity Cards ========== */
        .activity-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .activity-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
        }
        .activity-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 32px rgba(15, 23, 42, 0.1);
            border-color: rgba(79, 70, 229, 0.2);
        }
        .activity-card .cover {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .activity-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }
        .activity-card:hover .cover img { transform: scale(1.05); }
        .activity-card .cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, 0.5));
        }
        .activity-card .badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .badge-hot { background: rgba(239, 68, 68, 0.9); }
        .badge-new { background: rgba(79, 70, 229, 0.9); }
        .badge-end { background: rgba(100, 116, 139, 0.85); }
        .activity-card .badge-time {
            position: absolute;
            bottom: 10px;
            right: 14px;
            z-index: 2;
            color: rgba(255, 255, 255, 0.9);
            font-size: 12px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .activity-card .card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .activity-card .card-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            margin: 0 0 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .activity-card:hover .card-title { color: var(--primary); }
        .activity-card .card-desc {
            font-size: 13px;
            color: #64748b;
            line-height: 1.6;
            margin: 0 0 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .activity-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid #f1f5f9;
            padding-top: 14px;
        }
        .activity-card .reward {
            font-size: 13px;
            color: var(--secondary);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .activity-card .link-arrow {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            font-size: 12px;
            transition: all 0.2s;
        }
        .activity-card .link-arrow:hover { background: var(--primary); color: #fff; }

        /* ========== Hot List ========== */
        .hot-section {
            background: linear-gradient(180deg, #f8fafc, #fff);
        }
        .hot-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .hot-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 14px;
            padding: 16px 20px;
            transition: all 0.25s;
        }
        .hot-item:hover {
            border-color: rgba(79, 70, 229, 0.3);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .hot-rank {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            font-size: 18px;
            font-weight: 800;
            background: #f1f5f9;
            color: #64748b;
            flex-shrink: 0;
        }
        .hot-rank.top { background: linear-gradient(135deg, #f59e0b, #fbbf24); color: #fff; }
        .hot-item:nth-child(2) .hot-rank { background: linear-gradient(135deg, #94a3b8, #cbd5e1); color: #fff; }
        .hot-item:nth-child(3) .hot-rank { background: linear-gradient(135deg, #b45309, #d97706); color: #fff; }
        .hot-info { flex: 1; min-width: 0; }
        .hot-info h3 {
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .hot-info p {
            font-size: 12px;
            color: #94a3b8;
            margin: 0;
        }
        .hot-item .btn-sm { flex-shrink: 0; }

        /* ========== Timeline ========== */
        .timeline-section {
            background: #0f172a;
            position: relative;
            overflow: hidden;
        }
        .timeline-section::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 6px;
            background: linear-gradient(90deg, #4f46e5, #7c3aed, #a855f7, #f59e0b);
        }
        .timeline-section .section-header h2 { color: #fff; }
        .timeline-section .section-header .tag { color: #c4b5fd; background: rgba(196, 181, 253, 0.12); }
        .timeline-section .section-header .sub { color: #94a3b8; }
        .timeline {
            position: relative;
            padding: 20px 0;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, rgba(79, 70, 229, 0.6), rgba(245, 158, 11, 0.6));
            transform: translateX(-50%);
        }
        .timeline-item {
            position: relative;
            width: 50%;
            padding: 0 40px 40px;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }
        .timeline-dot {
            position: absolute;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #4f46e5;
            border: 3px solid #0f172a;
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.3);
        }
        .timeline-item:nth-child(odd) .timeline-dot { right: -7px; }
        .timeline-item:nth-child(even) .timeline-dot { left: -7px; }
        .timeline-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 24px;
            backdrop-filter: blur(8px);
            transition: all 0.3s;
            display: inline-block;
            text-align: left;
            max-width: 100%;
        }
        .timeline-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(196, 181, 253, 0.4);
            transform: translateY(-4px);
        }
        .timeline-date {
            font-size: 13px;
            color: #c4b5fd;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 10px;
        }
        .timeline-card h3 {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 8px;
        }
        .timeline-card p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 13px;
            margin: 0;
            line-height: 1.6;
        }

        /* ========== Guide Steps ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-bottom: 40px;
        }
        .step-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 28px 24px;
            text-align: center;
            transition: all 0.3s;
            position: relative;
        }
        .step-card::before {
            content: '';
            position: absolute;
            top: -1px; left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 4px;
            background: linear-gradient(90deg, #4f46e5, #7c3aed);
            border-radius: 0 0 4px 4px;
            transition: all 0.3s;
        }
        .step-card:hover::before { width: 60%; }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .step-num {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            font-size: 20px;
            font-weight: 800;
        }
        .step-card h3 { font-size: 16px; font-weight: 700; margin: 0 0 8px; }
        .step-card p { font-size: 13px; color: #64748b; margin: 0; line-height: 1.6; }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.25s;
        }
        .faq-item:hover { border-color: rgba(79, 70, 229, 0.25); box-shadow: var(--shadow); }
        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
        }
        .faq-q i {
            color: var(--primary);
            font-size: 14px;
            transition: transform 0.3s;
            flex-shrink: 0;
        }
        .faq-item.active .faq-q i { transform: rotate(45deg); }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-a-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: #64748b;
            line-height: 1.7;
            border-top: 1px solid #f1f5f9;
            padding-top: 16px;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #312e81, #4f46e5);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 36px;
            font-weight: 800;
            margin: 0 0 16px;
        }
        .cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 32px;
        }
        .cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* ========== Footer ========== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 64px 0 0;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand p { font-size: 14px; line-height: 1.7; max-width: 300px; }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 16px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: #94a3b8;
            transition: all 0.2s;
        }
        .footer-col ul li a:hover { color: #e2e8f0; }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: #64748b;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .header-inner { height: 64px; }
            .page-banner { padding: 80px 0 64px; }
            .page-banner h1 { font-size: 34px; }
            .activity-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .section { padding: 56px 0; }
        }
        @media (max-width: 768px) {
            .nav-left, .nav-right { display: none; }
            .mobile-toggle { display: flex; }
            .mobile-menu { display: none; position: absolute; top: 64px; left: 0; right: 0; }
            .mobile-menu.open { display: block; }
            .header-inner { height: 64px; }
            .logo { margin: 0 auto; }
            .page-banner { padding: 64px 0 48px; }
            .page-banner h1 { font-size: 28px; }
            .banner-stats { gap: 24px; flex-wrap: wrap; }
            .banner-stats .stat-num { font-size: 26px; }
            .section-header { flex-direction: column; align-items: flex-start; gap: 8px; }
            .section-header h2 { font-size: 24px; }
            .activity-grid { grid-template-columns: 1fr; }
            .hot-list { grid-template-columns: 1fr; }
            .timeline::before { left: 20px; }
            .timeline-item { width: 100%; padding: 0 0 30px 60px; text-align: left !important; }
            .timeline-item:nth-child(odd) { left: 0; }
            .timeline-item:nth-child(even) { left: 0; }
            .timeline-dot, .timeline-item:nth-child(odd) .timeline-dot { left: 12px; right: auto; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-inner h2 { font-size: 28px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .header-inner { gap: 8px; }
            .logo { font-size: 15px; gap: 6px; }
            .logo-dot { width: 30px; height: 30px; font-size: 12px; }
            .page-banner { padding: 48px 0 40px; }
            .page-banner h1 { font-size: 24px; }
            .btn-lg { padding: 12px 24px; font-size: 14px; }
            .activity-card .card-title { font-size: 16px; }
            .section { padding: 40px 0; }
            .filter-bar { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; }
            .filter-tag { flex-shrink: 0; }
            .hot-item { padding: 14px; }
            .step-card { padding: 22px 18px; }
        }
        /* Focus */
        a:focus-visible, button:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }
        /* Scrollbar */
        .timeline-card::-webkit-scrollbar { width: 4px; }
        .timeline-card::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 4px; }