/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #4F46E5;
            --primary-dark: #3730A3;
            --primary-light: #818CF8;
            --secondary: #06B6D4;
            --accent: #F59E0B;
            --bg-body: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-section-alt: #F1F5F9;
            --bg-dark: #0F172A;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --text-inverse: #FFFFFF;
            --border-light: #E2E8F0;
            --border-focus: #4F46E5;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 24px 48px rgba(0,0,0,0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== 基础 Reset / Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul, ol {
            list-style: none;
        }
        h1, h2, h3, h4, h5, h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }
        h1 { font-size: 2.75rem; }
        h2 { font-size: 2.25rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
            width: 100%;
        }

        /* ===== 头部 / 导航 (SaaS 命令栏风格) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
            gap: 1rem;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--primary);
        }
        .logo:hover {
            color: var(--primary-dark);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-main a {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            background: rgba(79,70,229,0.08);
            color: var(--primary);
        }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(79,70,229,0.10);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border-light);
            border-radius: 40px;
            padding: 0.3rem 0.3rem 0.3rem 1rem;
            transition: border-color var(--transition), box-shadow var(--transition);
            max-width: 220px;
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(79,70,229,0.15);
        }
        .search-box input {
            border: none;
            background: transparent;
            padding: 0.4rem 0;
            font-size: 0.85rem;
            color: var(--text-primary);
            width: 100%;
            min-width: 80px;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-box button {
            background: var(--primary);
            color: #fff;
            border-radius: 40px;
            padding: 0.4rem 1rem;
            font-size: 0.8rem;
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
            white-space: nowrap;
        }
        .search-box button:hover {
            background: var(--primary-dark);
            transform: scale(0.97);
        }
        .btn-cta-nav {
            background: var(--primary);
            color: #fff;
            padding: 0.5rem 1.5rem;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }
        .btn-cta-nav:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
            color: #fff;
        }
        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            padding: 0.25rem 0.5rem;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: rgba(0,0,0,0.05);
        }
        /* 移动端导航抽屉 */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.3);
            z-index: 999;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .mobile-nav-overlay.open {
            opacity: 1;
        }
        .mobile-nav-drawer {
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-lg);
            z-index: 1000;
            padding: 1rem 1.5rem 1.5rem;
            transform: translateY(-110%);
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            max-height: calc(100vh - var(--nav-height));
            overflow-y: auto;
        }
        .mobile-nav-drawer.open {
            transform: translateY(0);
        }
        .mobile-nav-drawer a {
            display: block;
            padding: 0.75rem 0;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-nav-drawer a:last-child {
            border-bottom: none;
        }
        .mobile-nav-drawer a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .mobile-nav-drawer .mobile-cta {
            margin-top: 0.75rem;
            background: var(--primary);
            color: #fff;
            text-align: center;
            padding: 0.75rem;
            border-radius: var(--radius-md);
            font-weight: 600;
        }
        .mobile-nav-drawer .mobile-cta:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        /* ===== 按钮共用 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.65rem 1.75rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: #fff;
        }
        .btn-secondary {
            background: var(--bg-white);
            color: var(--primary);
            border: 1.5px solid var(--border-light);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(79,70,229,0.04);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-inverse);
            border: 1.5px solid rgba(255,255,255,0.3);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.6);
            color: #fff;
        }
        .btn-lg {
            padding: 0.85rem 2.5rem;
            font-size: 1.05rem;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            padding: calc(var(--nav-height) + 3rem) 0 4rem;
            background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 50%, #C7D2FE 100%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(79,70,229,0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(6,182,212,0.10) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.15;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .hero-content h1 span {
            color: var(--primary);
        }
        .hero-content p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            max-width: 480px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
            padding: 2rem;
            width: 100%;
            max-width: 460px;
            border: 1px solid rgba(255,255,255,0.6);
            backdrop-filter: blur(4px);
        }
        .hero-card-stats {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 0.75rem;
            margin-bottom: 1.5rem;
        }
        .hero-stat {
            text-align: center;
            padding: 0.75rem 0.5rem;
            background: var(--bg-body);
            border-radius: var(--radius-md);
        }
        .hero-stat .num {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.75rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .hero-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .hero-tag {
            background: rgba(79,70,229,0.08);
            color: var(--primary);
            padding: 0.3rem 0.9rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 5rem 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-inverse);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: var(--text-inverse);
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .section-title p {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }
        .section-title .badge {
            display: inline-block;
            background: rgba(79,70,229,0.10);
            color: var(--primary);
            padding: 0.25rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }

        /* ===== 特性 / 亮点卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .feature-card .icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(79,70,229,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.5rem;
            color: var(--primary);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            margin-bottom: 0.5rem;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 分类入口 ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .category-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--primary);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .category-card:hover::before {
            opacity: 1;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .category-card .cat-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(79,70,229,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.8rem;
            color: var(--primary);
            transition: background var(--transition);
        }
        .category-card:hover .cat-icon {
            background: rgba(79,70,229,0.12);
        }
        .category-card h3 {
            font-size: 1.15rem;
            margin-bottom: 0.4rem;
        }
        .category-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }
        .category-card .cat-count {
            display: inline-block;
            background: var(--bg-body);
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-size: 0.75rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== 最新资讯列表 (CMS) ===== */
        .news-list {
            display: grid;
            gap: 1rem;
        }
        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 1.25rem;
            background: var(--bg-white);
            padding: 1.25rem 1.5rem;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .news-item:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-md);
        }
        .news-item .news-index {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(79,70,229,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--primary);
            flex-shrink: 0;
        }
        .news-item .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-item .news-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.2rem;
        }
        .news-item .news-body h4 a {
            color: var(--text-primary);
        }
        .news-item .news-body h4 a:hover {
            color: var(--primary);
        }
        .news-item .news-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .news-item .news-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }
        .news-item .news-meta .cat-tag {
            background: rgba(79,70,229,0.06);
            color: var(--primary);
            padding: 0.1rem 0.6rem;
            border-radius: 40px;
            font-weight: 500;
        }
        .news-empty {
            text-align: center;
            padding: 3rem 1rem;
            color: var(--text-muted);
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-light);
        }
        .news-empty i {
            font-size: 2rem;
            margin-bottom: 0.75rem;
            display: block;
            color: var(--text-muted);
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 2rem 1rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-3px);
        }
        .stat-card .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-card .stat-num .suffix {
            font-size: 1.2rem;
            font-weight: 600;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 0.3rem;
        }

        /* ===== 攻略精选 (静态卡片) ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .guide-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .guide-card .guide-img {
            height: 180px;
            background: linear-gradient(135deg, #E0E7FF, #C7D2FE);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            color: var(--primary);
            position: relative;
        }
        .guide-card .guide-img .badge-overlay {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            background: rgba(79,70,229,0.9);
            color: #fff;
            padding: 0.2rem 0.8rem;
            border-radius: 40px;
            font-size: 0.7rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }
        .guide-card .guide-body {
            padding: 1.25rem 1.25rem 1.5rem;
        }
        .guide-card .guide-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.35rem;
        }
        .guide-card .guide-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 0.75rem;
        }
        .guide-card .guide-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .guide-card .guide-footer a {
            color: var(--primary);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 740px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 0.75rem;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            background: transparent;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(79,70,229,0.03);
        }
        .faq-question i {
            color: var(--text-muted);
            transition: transform var(--transition);
            font-size: 0.9rem;
        }
        .faq-question.open i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 1.5rem 1.25rem;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-lg);
            padding: 3.5rem 3rem;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255,255,255,0.10) 0%, transparent 70%);
            border-radius: 50%;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: #fff;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 2rem;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn {
            background: #fff;
            color: var(--primary);
        }
        .cta-section .btn:hover {
            background: rgba(255,255,255,0.9);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.15);
        }
        .cta-section .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255,255,255,0.4);
        }
        .cta-section .btn-outline-light:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.7);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-brand .logo {
            color: var(--text-inverse);
            margin-bottom: 0.75rem;
            font-size: 1.2rem;
        }
        .footer-brand .logo i {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.55);
            max-width: 280px;
            line-height: 1.6;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-inverse);
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.55);
            padding: 0.3rem 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }
        .footer-social {
            display: flex;
            gap: 0.75rem;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.5);
            transition: background var(--transition), color var(--transition);
        }
        .footer-social a:hover {
            background: rgba(79,70,229,0.3);
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero-content p {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-card {
                max-width: 100%;
            }
            .features-grid,
            .categories-grid,
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-main {
                display: none;
            }
            .header-actions .search-box {
                display: none;
            }
            .header-actions .btn-cta-nav {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .mobile-nav-overlay {
                display: block;
                pointer-events: none;
            }
            .mobile-nav-overlay.open {
                pointer-events: auto;
            }
            .mobile-nav-drawer {
                display: block;
            }
            :root {
                --nav-height: 64px;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.75rem; }
            .hero {
                padding: calc(var(--nav-height) + 2rem) 0 2.5rem;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .section {
                padding: 3rem 0;
            }
            .features-grid,
            .categories-grid,
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            .stat-card .stat-num {
                font-size: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section {
                padding: 2.5rem 1.5rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .news-item {
                flex-direction: column;
                gap: 0.5rem;
                padding: 1rem 1.25rem;
            }
            .news-item .news-index {
                width: 28px;
                height: 28px;
                font-size: 0.75rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
            .hero-content h1 {
                font-size: 1.8rem;
            }
            .hero-card {
                padding: 1.25rem;
            }
            .hero-card-stats {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 0.5rem;
            }
            .hero-stat .num {
                font-size: 1.2rem;
            }
            .stat-card {
                padding: 1.25rem 0.75rem;
            }
            .stat-card .stat-num {
                font-size: 1.5rem;
            }
            .btn-lg {
                padding: 0.7rem 1.5rem;
                font-size: 0.9rem;
            }
            .section-title h2 {
                font-size: 1.5rem;
            }
            .guide-card .guide-img {
                height: 140px;
            }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 0.5rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .gap-1 { gap: 0.5rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .sr-only {
            position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
            overflow: hidden; clip: rect(0,0,0,0); border: 0;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --primary-light: #A29BFE;
            --primary-bg: #F4F2FF;
            --secondary: #FD79A8;
            --accent: #00CEC9;
            --accent-dark: #00B5B0;
            --bg: #FFFFFF;
            --bg-alt: #F8F9FD;
            --bg-card: #FFFFFF;
            --text: #1A1A2E;
            --text-light: #5A5A7A;
            --text-muted: #8E8EA0;
            --border: #E8E8F0;
            --border-light: #F0F0F5;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.06);
            --shadow-md: 0 4px 20px rgba(108, 92, 231, 0.10);
            --shadow-lg: 0 8px 40px rgba(108, 92, 231, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            font-size: 16px;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .logo i { font-size: 26px; color: var(--secondary); }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0 16px;
            flex-wrap: wrap;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-main a:hover { color: var(--primary); background: var(--primary-bg); }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(108,92,231,0.30);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 100px;
            padding: 0 16px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            min-width: 180px;
        }
        .search-box:focus-within { border-color: var(--primary-light); box-shadow: 0 0 0 4px rgba(108,92,231,0.10); }
        .search-box i { color: var(--text-muted); font-size: 14px; }
        .search-box input {
            background: transparent;
            border: none;
            padding: 8px 10px;
            font-size: 14px;
            color: var(--text);
            width: 100%;
        }
        .search-box input::placeholder { color: var(--text-muted); }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 15px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(108,92,231,0.30);
            transition: var(--transition);
            border: none;
            white-space: nowrap;
        }
        .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(108,92,231,0.35); color: #fff; }
        .btn-cta:active { transform: translateY(0); }
        .btn-cta i { font-size: 14px; }

        /* ===== Mobile Menu Toggle ===== */
        .menu-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--text); padding: 4px; cursor: pointer; }

        /* ===== Article Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, var(--primary-bg) 0%, #FFFFFF 100%);
            padding: 60px 0 40px;
            border-bottom: 1px solid var(--border-light);
        }
        .article-hero .container { max-width: 860px; }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--text-muted); }
        .article-breadcrumb a:hover { color: var(--primary); }
        .article-breadcrumb .sep { color: var(--border); }
        .article-breadcrumb .current { color: var(--text-light); font-weight: 500; }
        .article-category-badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }
        .article-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            color: var(--text);
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 14px;
        }
        .article-meta i { margin-right: 4px; font-size: 13px; }
        .article-meta span { display: inline-flex; align-items: center; }
        .article-hero-image {
            margin-top: 32px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            max-height: 480px;
            object-fit: cover;
            width: 100%;
            background: var(--bg-alt);
        }

        /* ===== Article Content ===== */
        .article-content-section {
            padding: 48px 0 60px;
            background: var(--bg);
        }
        .article-content-section .container { max-width: 860px; }
        .article-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body h2, .article-body h3, .article-body h4 {
            margin-top: 32px;
            margin-bottom: 16px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.3px;
        }
        .article-body h2 { font-size: 26px; }
        .article-body h3 { font-size: 21px; }
        .article-body h4 { font-size: 18px; }
        .article-body p { margin-bottom: 20px; }
        .article-body ul, .article-body ol { margin-bottom: 20px; padding-left: 24px; list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 8px; }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-bg);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body code {
            background: var(--bg-alt);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            font-family: 'SF Mono', 'Fira Code', monospace;
            border: 1px solid var(--border-light);
        }
        .article-body pre {
            background: #1A1A2E;
            color: #E8E8F0;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 14px;
            line-height: 1.6;
        }
        .article-body pre code { background: transparent; border: none; color: inherit; padding: 0; }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 24px auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body a { text-decoration: underline; text-underline-offset: 3px; }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            padding: 6px 16px;
            border-radius: 100px;
            background: var(--bg-alt);
            color: var(--text-light);
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary-bg); color: var(--primary); border-color: var(--primary-light); }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 24px;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
        }
        .article-share span { font-size: 14px; color: var(--text-muted); font-weight: 500; }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-alt);
            color: var(--text-light);
            font-size: 16px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .article-share a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }

        /* ===== Article Nav (Prev/Next) ===== */
        .article-nav {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border-light);
            display: flex;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .article-nav a {
            display: flex;
            flex-direction: column;
            gap: 4px;
            max-width: 45%;
            padding: 16px 20px;
            border-radius: var(--radius-md);
            background: var(--bg-alt);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .article-nav a:hover { background: var(--primary-bg); border-color: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
        .article-nav .nav-label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
        .article-nav .nav-title { font-size: 15px; font-weight: 600; color: var(--text); }
        .article-nav .nav-right { text-align: right; align-items: flex-end; }

        /* ===== Related Posts ===== */
        .related-section {
            background: var(--bg-alt);
            padding: 60px 0;
        }
        .related-section .section-title {
            font-size: 28px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 8px;
        }
        .related-section .section-sub {
            text-align: center;
            color: var(--text-muted);
            margin-bottom: 40px;
            font-size: 16px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .related-card .card-image {
            height: 180px;
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-light);
            font-size: 40px;
            overflow: hidden;
        }
        .related-card .card-image img { width: 100%; height: 100%; object-fit: cover; }
        .related-card .card-body { padding: 20px; }
        .related-card .card-body h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
        .related-card .card-body h3 a { color: var(--text); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-meta { font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 12px; }
        .related-card .card-meta i { margin-right: 4px; font-size: 12px; }

        /* ===== CTA Section ===== */
        .article-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 60px 0;
            text-align: center;
            color: #fff;
        }
        .article-cta h2 { font-size: 30px; font-weight: 700; margin-bottom: 12px; }
        .article-cta p { font-size: 17px; opacity: 0.9; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .article-cta .btn-cta-white {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 100px;
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            font-size: 17px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            transition: var(--transition);
        }
        .article-cta .btn-cta-white:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(0,0,0,0.20); color: var(--primary-dark); }

        /* ===== Footer ===== */
        .site-footer {
            background: #1A1A2E;
            color: #C8C8E0;
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { color: #fff; font-size: 20px; margin-bottom: 16px; }
        .footer-brand .logo i { color: var(--secondary); }
        .footer-brand p { font-size: 14px; line-height: 1.7; color: #A0A0C0; }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: #C8C8E0;
            font-size: 16px;
            margin-right: 8px;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
        .footer-col a {
            display: block;
            color: #A0A0C0;
            font-size: 14px;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #707090;
        }

        /* ===== Not Found State ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-alt);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
        }
        .not-found-box i { font-size: 56px; color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 28px; color: var(--text); margin-bottom: 12px; }
        .not-found-box p { color: var(--text-muted); margin-bottom: 24px; font-size: 16px; }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 100px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-back:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            :root { --nav-height: 64px; }
            .menu-toggle { display: block; }
            .nav-main {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
            }
            .nav-main.open { display: flex; }
            .nav-main a { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); }
            .nav-actions .search-box { display: none; }
            .nav-actions .btn-cta { padding: 8px 16px; font-size: 13px; }
            .article-title { font-size: 26px; }
            .article-body { font-size: 16px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .article-hero { padding: 40px 0 24px; }
            .article-content-section { padding: 32px 0 40px; }
            .article-nav { flex-direction: column; }
            .article-nav a { max-width: 100%; }
            .related-section { padding: 40px 0; }
            .article-cta { padding: 40px 0; }
            .article-cta h2 { font-size: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .header-inner { padding: 0 16px; }
            .logo { font-size: 18px; }
            .logo i { font-size: 20px; }
            .article-title { font-size: 22px; }
            .article-meta { gap: 12px; font-size: 13px; }
            .article-body h2 { font-size: 21px; }
            .article-body h3 { font-size: 18px; }
            .related-section .section-title { font-size: 22px; }
            .article-cta h2 { font-size: 20px; }
            .article-cta .btn-cta-white { padding: 12px 24px; font-size: 15px; }
            .not-found-box { padding: 40px 16px; }
            .not-found-box i { font-size: 40px; }
        }

        /* ===== Accessibility ===== */
        a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }
        @media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }

/* roulang page: category1 */
/* ======================================
           设计变量
           ====================================== */
        :root {
            --color-primary: #0f1724;
            --color-primary-light: #1e293b;
            --color-accent: #4f46e5;
            --color-accent-hover: #4338ca;
            --color-accent-light: #eef2ff;
            --color-gold: #f59e0b;
            --color-gold-light: #fef3c7;
            --color-success: #10b981;
            --color-bg: #f0f2f5;
            --color-card: #ffffff;
            --color-text: #1e293b;
            --color-text-weak: #64748b;
            --color-text-inverse: #f8fafc;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.18);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ======================================
           Reset / Base
           ====================================== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.65;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-accent-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 2px;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ======================================
           Typography
           ====================================== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin-top: 0;
            margin-bottom: 0.5em;
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-text);
        }
        h1 {
            font-size: 2.75rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: 1.375rem;
        }
        h4 {
            font-size: 1.125rem;
        }
        p {
            margin-top: 0;
            margin-bottom: 1rem;
            color: var(--color-text-weak);
        }
        .text-center {
            text-align: center;
        }
        .text-weak {
            color: var(--color-text-weak);
        }

        /* ======================================
           导航 Nav
           ====================================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .logo i {
            color: var(--color-gold);
            font-size: 1.5rem;
        }
        .logo a {
            color: inherit;
            text-decoration: none;
        }
        .logo a:hover {
            color: var(--color-gold);
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-main a {
            display: block;
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            text-decoration: none;
        }
        .nav-main a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #ffffff;
        }
        .nav-main a.active {
            background: var(--color-accent);
            color: #ffffff;
            font-weight: 600;
        }
        .nav-main a.active:hover {
            background: var(--color-accent-hover);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .header-actions .search-box {
            position: relative;
            display: flex;
            align-items: center;
        }
        .header-actions .search-box input[type="text"] {
            width: 200px;
            padding: 0.45rem 1rem 0.45rem 2.25rem;
            border: none;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.12);
            color: #ffffff;
            font-size: 0.85rem;
            transition: background var(--transition), width var(--transition);
            outline: none;
        }
        .header-actions .search-box input[type="text"]::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .header-actions .search-box input[type="text"]:focus {
            background: rgba(255, 255, 255, 0.2);
            width: 260px;
        }
        .header-actions .search-box i {
            position: absolute;
            left: 0.75rem;
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.85rem;
        }
        .header-actions .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.45rem 1.25rem;
            background: var(--color-gold);
            color: var(--color-primary);
            font-weight: 700;
            font-size: 0.85rem;
            border-radius: 999px;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
            text-decoration: none;
        }
        .header-actions .btn-cta:hover {
            background: #eab308;
            transform: translateY(-1px);
            color: var(--color-primary);
        }

        /* 移动端汉堡 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: #ffffff;
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }

        /* ======================================
           移动端菜单
           ====================================== */
        @media (max-width: 1023px) {
            .nav-main {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-primary);
                flex-direction: column;
                padding: 1rem 1.5rem 1.5rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                box-shadow: var(--shadow-lg);
                gap: 0.25rem;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                padding: 0.75rem 1rem;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }
            .hamburger {
                display: flex;
            }
            .header-actions .search-box input[type="text"] {
                width: 140px;
            }
            .header-actions .search-box input[type="text"]:focus {
                width: 180px;
            }
        }

        @media (max-width: 640px) {
            .header-actions .search-box {
                display: none;
            }
            .header-actions .btn-cta {
                padding: 0.4rem 0.9rem;
                font-size: 0.8rem;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
        }

        /* ======================================
           Hero 板块
           ====================================== */
        .hero-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #1a1a3e 60%, #2d1b69 100%);
            padding: 5rem 0 4rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(79, 70, 229, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-section .container {
            position: relative;
            z-index: 1;
        }
        .hero-section h1 {
            color: #ffffff;
            font-size: 3rem;
            margin-bottom: 0.75rem;
        }
        .hero-section h1 i {
            color: var(--color-gold);
        }
        .hero-section .hero-sub {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 640px;
            margin-bottom: 2rem;
            line-height: 1.6;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin-top: 2rem;
        }
        .hero-stats .stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stats .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-gold);
            line-height: 1.2;
        }
        .hero-stats .stat-item .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
        }
        .hero-badge-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
        }
        .hero-badge-group .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.3rem 0.9rem;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(4px);
            color: rgba(255, 255, 255, 0.9);
            font-size: 0.8rem;
            font-weight: 500;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-badge-group .badge i {
            color: var(--color-gold);
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 3.5rem 0 3rem;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-section .hero-sub {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.25rem;
            }
            .hero-stats .stat-item .num {
                font-size: 1.5rem;
            }
        }

        /* ======================================
           板块通用
           ====================================== */
        .section {
            padding: 4rem 0;
        }
        .section-alt {
            background: var(--color-card);
        }
        .section-title {
            margin-bottom: 0.5rem;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--color-text-weak);
            max-width: 600px;
            margin-bottom: 2.5rem;
        }

        /* ======================================
           卡片网格
           ====================================== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .card {
            background: var(--color-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-border-light);
        }
        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .card:hover .card-image img {
            transform: scale(1.05);
        }
        .card-image .card-tag {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            padding: 0.25rem 0.7rem;
            background: var(--color-accent);
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 999px;
            backdrop-filter: blur(4px);
            box-shadow: var(--shadow-sm);
        }
        .card-image .card-tag.hot {
            background: #ef4444;
        }
        .card-image .card-tag.new {
            background: var(--color-success);
        }
        .card-image .card-tag.gold {
            background: var(--color-gold);
            color: var(--color-primary);
        }
        .card-body {
            padding: 1.25rem 1.25rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 0.4rem;
            line-height: 1.4;
        }
        .card-body h3 a {
            color: var(--color-text);
            text-decoration: none;
        }
        .card-body h3 a:hover {
            color: var(--color-accent);
        }
        .card-body p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            margin-bottom: 0.75rem;
            flex: 1;
        }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--color-text-weak);
            margin-top: auto;
            padding-top: 0.75rem;
            border-top: 1px solid var(--color-border-light);
        }
        .card-meta .views {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .card-meta .views i {
            font-size: 0.75rem;
        }

        /* ======================================
           标签 / 徽章
           ====================================== */
        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
        }
        .tag-group .tag {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.4rem 1rem;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-weak);
            transition: background var(--transition), color var(--transition), border-color var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .tag-group .tag:hover {
            background: var(--color-accent-light);
            color: var(--color-accent);
            border-color: var(--color-accent);
        }
        .tag-group .tag.active {
            background: var(--color-accent);
            color: #ffffff;
            border-color: var(--color-accent);
        }

        /* ======================================
           数据 / 统计区
           ====================================== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.5rem;
            text-align: center;
        }
        .stats-grid .stat-card {
            background: var(--color-card);
            padding: 2rem 1rem;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .stats-grid .stat-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .stats-grid .stat-card .icon {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 0.75rem;
        }
        .stats-grid .stat-card .num {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--color-text);
            line-height: 1.2;
        }
        .stats-grid .stat-card .label {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            margin-top: 0.25rem;
        }

        /* ======================================
           FAQ
           ====================================== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.1rem 1.25rem;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--color-text);
            transition: background var(--transition);
            gap: 1rem;
        }
        .faq-question:hover {
            background: var(--color-border-light);
        }
        .faq-question i {
            color: var(--color-accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 1.25rem 1.1rem;
            font-size: 0.95rem;
            color: var(--color-text-weak);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ======================================
           CTA
           ====================================== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #2d1b69 100%);
            padding: 4rem 0;
            text-align: center;
        }
        .cta-section h2 {
            color: #ffffff;
            font-size: 2rem;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 500px;
            margin: 0 auto 2rem;
            font-size: 1.05rem;
        }
        .cta-section .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            background: var(--color-gold);
            color: var(--color-primary);
            font-weight: 700;
            font-size: 1rem;
            border-radius: 999px;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
            text-decoration: none;
        }
        .btn-primary:hover {
            background: #eab308;
            transform: translateY(-2px);
            color: var(--color-primary);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            background: transparent;
            color: #ffffff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: 999px;
            border: 2px solid rgba(255, 255, 255, 0.25);
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
            text-decoration: none;
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-2px);
            color: #ffffff;
        }

        /* ======================================
           页脚 Footer
           ====================================== */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 3.5rem 0 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .logo {
            margin-bottom: 0.75rem;
            font-size: 1.2rem;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 360px;
            line-height: 1.7;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
            margin-right: 0.5rem;
            text-decoration: none;
        }
        .footer-social a:hover {
            background: var(--color-accent);
            color: #ffffff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            color: #ffffff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            padding: 0.25rem 0;
            transition: color var(--transition);
            text-decoration: none;
        }
        .footer-col a:hover {
            color: var(--color-gold);
        }
        .footer-bottom {
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            gap: 0.5rem;
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ======================================
           响应式微调
           ====================================== */
        @media (max-width: 768px) {
            .section {
                padding: 2.5rem 0;
            }
            .card-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .stats-grid .stat-card .num {
                font-size: 1.75rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .hero-stats {
                flex-direction: column;
                gap: 0.75rem;
            }
            .hero-section h1 {
                font-size: 1.6rem;
            }
            .container {
                padding: 0 1rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

        /* ======================================
           工具类
           ====================================== */
        .mt-1 {
            margin-top: 0.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 2rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
        }

        /* Foundation 覆盖 — 去除默认按钮样式干扰 */
        .button,
        button {
            font-family: inherit;
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --secondary: #fd79a8;
            --accent: #00cec9;
            --bg-body: #f8f9fc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #2d3436;
            --text-primary: #2d3436;
            --text-secondary: #636e72;
            --text-light: #b2bec3;
            --text-white: #ffffff;
            --border-color: #e8ecf1;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
            --shadow-md: 0 8px 28px rgba(108, 92, 231, 0.12);
            --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-width: 1200px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: var(--container-width);
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        .header-left {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            letter-spacing: -0.5px;
            white-space: nowrap;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--secondary);
        }
        .logo:hover {
            color: var(--primary-dark);
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-main a {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.9rem;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(108, 92, 231, 0.06);
        }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(108, 92, 231, 0.1);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .header-right {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 0.4rem 1rem;
            transition: var(--transition);
            min-width: 200px;
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
        }
        .search-box i {
            color: var(--text-light);
            font-size: 0.85rem;
            margin-right: 0.5rem;
        }
        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.85rem;
            color: var(--text-primary);
            width: 100%;
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }

        .btn-header-cta {
            background: var(--primary);
            color: var(--text-white) !important;
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .btn-header-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 0.25rem;
        }

        /* ===== Hero 分类首屏 ===== */
        .category-hero {
            padding: 7rem 0 4rem;
            background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 50%, #fd79a8 100%);
            position: relative;
            overflow: hidden;
            margin-top: var(--header-height);
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .category-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 0.75rem;
            letter-spacing: -1px;
            line-height: 1.2;
        }
        .category-hero h1 i {
            margin-right: 0.5rem;
            opacity: 0.9;
        }
        .category-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 1.5rem;
            line-height: 1.7;
        }
        .hero-badges {
            display: flex;
            justify-content: center;
            gap: 0.75rem;
            flex-wrap: wrap;
        }
        .hero-badges .badge {
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(4px);
            color: var(--text-white);
            padding: 0.4rem 1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-badges .badge i {
            margin-right: 0.3rem;
        }

        /* ===== 分类标签筛选 ===== */
        .filter-bar {
            padding: 1.5rem 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: var(--header-height);
            z-index: 100;
        }
        .filter-bar .container {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-wrap: wrap;
        }
        .filter-label {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-right: 0.5rem;
        }
        .filter-tag {
            padding: 0.4rem 1rem;
            border-radius: 50px;
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-tag:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: rgba(108, 92, 231, 0.05);
        }
        .filter-tag.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .filter-tag i {
            margin-right: 0.3rem;
        }

        /* ===== 排行卡片区 ===== */
        .rank-section {
            padding: 3rem 0 4rem;
            background: var(--bg-body);
        }

        .rank-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
        }

        .rank-card {
            display: flex;
            align-items: center;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 1.25rem 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            gap: 1.5rem;
            position: relative;
        }
        .rank-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }

        .rank-number {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--primary-light);
            min-width: 48px;
            text-align: center;
            font-feature-settings: "tnum";
        }
        .rank-card:nth-child(1) .rank-number {
            color: #f1c40f;
        }
        .rank-card:nth-child(2) .rank-number {
            color: #bdc3c7;
        }
        .rank-card:nth-child(3) .rank-number {
            color: #e17055;
        }

        .rank-cover {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, #dfe6e9, #b2bec3);
            flex-shrink: 0;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--text-light);
        }
        .rank-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }
        .rank-info h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.2rem;
        }
        .rank-info .rank-meta {
            font-size: 0.82rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-wrap: wrap;
        }
        .rank-info .rank-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }
        .rank-info .rank-meta i {
            color: var(--primary-light);
            font-size: 0.75rem;
        }
        .rank-tags {
            display: flex;
            gap: 0.4rem;
            margin-top: 0.4rem;
            flex-wrap: wrap;
        }
        .rank-tags .tag {
            font-size: 0.7rem;
            padding: 0.15rem 0.6rem;
            border-radius: 50px;
            background: rgba(108, 92, 231, 0.08);
            color: var(--primary);
            font-weight: 500;
        }
        .rank-tags .tag.hot {
            background: rgba(253, 121, 168, 0.12);
            color: var(--secondary);
        }
        .rank-tags .tag.new {
            background: rgba(0, 206, 201, 0.12);
            color: var(--accent);
        }

        .rank-score {
            text-align: center;
            min-width: 64px;
        }
        .rank-score .score {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
        }
        .rank-score .score-label {
            font-size: 0.7rem;
            color: var(--text-light);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .rank-action {
            margin-left: 0.5rem;
        }
        .rank-action .btn-sm {
            padding: 0.4rem 1rem;
            border-radius: 50px;
            background: var(--primary);
            color: var(--text-white);
            font-size: 0.8rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .rank-action .btn-sm:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }
        .rank-action .btn-sm.outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .rank-action .btn-sm.outline:hover {
            background: var(--primary);
            color: var(--text-white);
        }

        /* ===== 分类特色数据 ===== */
        .stats-section {
            padding: 3.5rem 0;
            background: var(--bg-white);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }
        .stat-item .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            font-feature-settings: "tnum";
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 0.25rem;
        }
        .stat-item .stat-icon {
            font-size: 1.75rem;
            color: var(--primary-light);
            margin-bottom: 0.5rem;
        }

        /* ===== 推荐文章 / 资讯 ===== */
        .related-articles {
            padding: 3.5rem 0 4rem;
            background: var(--bg-body);
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            letter-spacing: -0.5px;
        }
        .section-sub {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 2rem;
        }
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .article-card .card-img {
            height: 180px;
            background: linear-gradient(135deg, #dfe6e9, #b2bec3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            color: var(--text-light);
            position: relative;
        }
        .article-card .card-img .badge-img {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--secondary);
            color: var(--text-white);
            padding: 0.2rem 0.7rem;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
        }
        .article-card .card-body {
            padding: 1.25rem 1.5rem 1.5rem;
        }
        .article-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.4rem;
            line-height: 1.4;
        }
        .article-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0.75rem;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--text-light);
        }
        .article-card .card-meta a {
            color: var(--primary);
            font-weight: 600;
        }
        .article-card .card-meta a:hover {
            color: var(--primary-dark);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 3.5rem 0;
            background: var(--bg-white);
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 1rem;
        }
        .faq-item {
            background: var(--bg-body);
            border-radius: var(--radius-md);
            padding: 1.25rem 1.5rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-q {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }
        .faq-item .faq-q i {
            color: var(--primary-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            margin-top: 0.75rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-a {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 3.5rem 0;
            background: linear-gradient(135deg, #6c5ce7, #a29bfe);
            text-align: center;
            color: var(--text-white);
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.9;
            max-width: 560px;
            margin: 0 auto 1.75rem;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--text-white);
            color: var(--primary) !important;
            padding: 0.85rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 3rem 0 1.5rem;
        }
        .site-footer .logo {
            color: var(--text-white);
        }
        .site-footer .logo i {
            color: var(--secondary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 0.75rem;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1rem;
            transition: var(--transition);
            margin-right: 0.4rem;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-white);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            padding: 0.3rem 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .nav-main {
                gap: 0;
            }
            .nav-main a {
                padding: 0.4rem 0.7rem;
                font-size: 0.82rem;
            }
            .search-box {
                min-width: 140px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }

            .mobile-toggle {
                display: block;
            }

            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 1rem 1.5rem;
                gap: 0.25rem;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                align-items: stretch;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-main a {
                padding: 0.7rem 1rem;
                font-size: 0.95rem;
                border-radius: var(--radius-sm);
            }
            .nav-main a.active::after {
                display: none;
            }
            .nav-main a.active {
                background: rgba(108, 92, 231, 0.1);
            }

            .header-right .search-box {
                display: none;
            }
            .header-right .btn-header-cta {
                padding: 0.4rem 1rem;
                font-size: 0.78rem;
            }

            .category-hero {
                padding: 5.5rem 0 3rem;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }

            .filter-bar {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }
            .filter-bar .container {
                flex-wrap: nowrap;
                gap: 0.5rem;
            }
            .filter-label {
                flex-shrink: 0;
            }

            .rank-card {
                flex-wrap: wrap;
                padding: 1rem 1.25rem;
                gap: 0.75rem;
            }
            .rank-number {
                font-size: 1.25rem;
                min-width: 32px;
            }
            .rank-cover {
                width: 56px;
                height: 56px;
                font-size: 1.5rem;
            }
            .rank-score {
                min-width: 48px;
            }
            .rank-score .score {
                font-size: 1.2rem;
            }
            .rank-action {
                width: 100%;
                margin-left: 0;
                text-align: right;
            }

            .article-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.25rem;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .section-title {
                font-size: 1.4rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .hero-badges .badge {
                font-size: 0.7rem;
                padding: 0.25rem 0.7rem;
            }
            .rank-card {
                padding: 0.85rem 1rem;
            }
            .rank-info h3 {
                font-size: 0.95rem;
            }
            .rank-info .rank-meta {
                font-size: 0.75rem;
                gap: 0.4rem;
            }
            .rank-tags .tag {
                font-size: 0.65rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .faq-item {
                padding: 1rem 1.25rem;
            }
            .faq-item .faq-q {
                font-size: 0.9rem;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 0.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --secondary: #fd79a8;
            --accent: #00cec9;
            --bg-body: #f8f9fc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #2d3436;
            --bg-section-alt: #f0f2f7;
            --text-primary: #1a1a2e;
            --text-body: #4a4a5a;
            --text-muted: #8888a0;
            --text-white: #ffffff;
            --border-color: #e8e8f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.06);
            --shadow-md: 0 8px 28px rgba(108, 92, 231, 0.10);
            --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.14);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-body);
            margin: 0;
            padding: 0;
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--primary-dark);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.25rem;
            margin-bottom: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
        }
        p {
            margin-bottom: 0;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        figure {
            margin: 0;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        @media screen and (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Navigation (SaaS 命令栏风格) ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(108, 92, 231, 0.08);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: nowrap;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .logo:hover {
            color: var(--primary);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            flex: 1;
            justify-content: center;
        }
        .nav-main::-webkit-scrollbar {
            display: none;
        }
        .nav-main a {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            color: var(--text-body);
            font-weight: 500;
            font-size: 0.92rem;
            white-space: nowrap;
            transition: var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(108, 92, 231, 0.06);
        }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(108, 92, 231, 0.10);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 100px;
            padding: 0.4rem 0.9rem 0.4rem 1.2rem;
            gap: 0.5rem;
            transition: var(--transition);
            min-width: 160px;
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.12);
        }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            padding: 0.2rem 0;
            font-size: 0.85rem;
            color: var(--text-primary);
            width: 100%;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .btn-cta {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 0.5rem 1.4rem;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.88rem;
            transition: var(--transition);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            white-space: nowrap;
        }
        .btn-cta:hover,
        .btn-cta:focus {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(108, 92, 231, 0.30);
        }
        .btn-cta-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 0.4rem 1.2rem;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.88rem;
            transition: var(--transition);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            white-space: nowrap;
        }
        .btn-cta-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 0.25rem;
            line-height: 1;
        }

        /* 移动端导航 */
        .nav-mobile {
            display: none;
            background: var(--bg-white);
            border-top: 1px solid var(--border-color);
            padding: 0.75rem 1rem;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            gap: 0.5rem;
            flex-wrap: nowrap;
        }
        .nav-mobile::-webkit-scrollbar {
            display: none;
        }
        .nav-mobile a {
            padding: 0.4rem 0.9rem;
            border-radius: 100px;
            color: var(--text-body);
            font-weight: 500;
            font-size: 0.85rem;
            white-space: nowrap;
            background: var(--bg-body);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .nav-mobile a.active {
            background: var(--primary);
            color: #fff;
        }
        .nav-mobile a:hover {
            background: var(--primary-light);
            color: #fff;
        }

        @media screen and (max-width: 900px) {
            .nav-main {
                display: none;
            }
            .nav-search {
                min-width: 120px;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-mobile {
                display: flex;
            }
            .site-header {
                height: auto;
                padding: 0.6rem 0;
            }
        }
        @media screen and (max-width: 600px) {
            .nav-search {
                min-width: 100px;
                padding: 0.3rem 0.7rem 0.3rem 1rem;
            }
            .nav-search input {
                width: 70px;
                font-size: 0.8rem;
            }
            .btn-cta {
                padding: 0.4rem 0.9rem;
                font-size: 0.8rem;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.3rem;
            }
        }

        /* ===== 分类页 Hero ===== */
        .category-hero {
            background: linear-gradient(135deg, #2d3436 0%, #1a1a2e 40%, #6c5ce7 100%);
            padding: 4rem 0 3.5rem;
            color: var(--text-white);
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 206, 201, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .category-hero h1 {
            font-size: 2.6rem;
            color: #fff;
            margin-bottom: 0.75rem;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .category-hero p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }
        .category-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
        }
        .category-hero .hero-tags span {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            padding: 0.35rem 1rem;
            border-radius: 100px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        @media screen and (max-width: 768px) {
            .category-hero {
                padding: 2.8rem 0 2.4rem;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 4rem 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-title {
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            letter-spacing: -0.3px;
        }
        .section-sub {
            font-size: 1rem;
            color: var(--text-muted);
            margin-bottom: 2.5rem;
            max-width: 600px;
        }
        .text-center .section-sub {
            margin-left: auto;
            margin-right: auto;
        }
        @media screen and (max-width: 640px) {
            .section {
                padding: 2.5rem 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-sub {
                font-size: 0.92rem;
                margin-bottom: 1.8rem;
            }
        }

        /* ===== 资讯卡片网格 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(108, 92, 231, 0.15);
        }
        .news-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--bg-section-alt);
        }
        .news-card .card-body {
            padding: 1.4rem 1.5rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .card-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 0.6rem;
        }
        .news-card .card-meta .tag {
            background: rgba(108, 92, 231, 0.08);
            color: var(--primary);
            padding: 0.15rem 0.6rem;
            border-radius: 100px;
            font-weight: 500;
            font-size: 0.75rem;
        }
        .news-card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .news-card .card-title a {
            color: inherit;
        }
        .news-card .card-title a:hover {
            color: var(--primary);
        }
        .news-card .card-excerpt {
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .card-footer-link {
            margin-top: 1rem;
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .news-card .card-footer-link i {
            transition: var(--transition);
            font-size: 0.8rem;
        }
        .news-card .card-footer-link:hover i {
            transform: translateX(3px);
        }

        @media screen and (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.4rem;
            }
        }
        @media screen and (max-width: 600px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .news-card .card-img {
                height: 170px;
            }
            .news-card .card-body {
                padding: 1rem 1.2rem 1.2rem;
            }
            .news-card .card-title {
                font-size: 1rem;
            }
        }

        /* ===== 热门资讯列表 ===== */
        .hot-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.2rem 2rem;
        }
        .hot-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .hot-item:hover {
            padding-left: 0.5rem;
        }
        .hot-item .rank {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary-light);
            min-width: 32px;
            line-height: 1.2;
        }
        .hot-item .rank.top {
            color: var(--secondary);
        }
        .hot-item .hot-content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.2rem;
        }
        .hot-item .hot-content h4 a {
            color: var(--text-primary);
        }
        .hot-item .hot-content h4 a:hover {
            color: var(--primary);
        }
        .hot-item .hot-content p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        @media screen and (max-width: 768px) {
            .hot-list {
                grid-template-columns: 1fr;
                gap: 0.6rem;
            }
            .hot-item .rank {
                font-size: 1.2rem;
                min-width: 26px;
            }
        }

        /* ===== 分类标签 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            justify-content: center;
        }
        .tag-cloud a {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 0.4rem 1.2rem;
            border-radius: 100px;
            font-size: 0.88rem;
            color: var(--text-body);
            font-weight: 500;
            transition: var(--transition);
        }
        .tag-cloud a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(108, 92, 231, 0.20);
        }

        /* ===== 特色专题 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 2rem 1.6rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .feature-card .f-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.10), rgba(0, 206, 201, 0.10));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.2rem;
            font-size: 1.6rem;
            color: var(--primary);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.6;
        }
        @media screen and (max-width: 900px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.2rem;
            }
        }
        @media screen and (max-width: 520px) {
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .feature-card {
                padding: 1.4rem 1.2rem;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 1.8rem 1rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-item .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-top: 0.3rem;
        }
        @media screen and (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            .stat-item .num {
                font-size: 1.7rem;
            }
        }
        @media screen and (max-width: 400px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.8rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #a29bfe 100%);
            padding: 3.5rem 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.6rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 1.8rem;
        }
        .cta-section .btn-cta {
            background: #fff;
            color: var(--primary);
            font-size: 1rem;
            padding: 0.7rem 2.2rem;
        }
        .cta-section .btn-cta:hover {
            background: var(--bg-body);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
        }
        @media screen and (max-width: 640px) {
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-section p {
                font-size: 0.92rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem 1.8rem;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            padding: 1.2rem 1.5rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-item h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.3rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .faq-item h4 i {
            color: var(--primary);
            font-size: 0.9rem;
        }
        .faq-item p {
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.6;
            margin-left: 1.4rem;
        }
        @media screen and (max-width: 768px) {
            .faq-grid {
                grid-template-columns: 1fr;
                gap: 0.8rem;
            }
            .faq-item {
                padding: 1rem 1.2rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 3.5rem 0 0;
            font-size: 0.9rem;
        }
        .site-footer .logo {
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .site-footer .logo i {
            color: var(--primary-light);
        }
        .site-footer p {
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            padding: 0.3rem 0;
            transition: var(--transition);
            font-size: 0.88rem;
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-social a {
            display: inline-block;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            text-align: center;
            line-height: 38px;
            font-size: 1rem;
            margin-right: 0.4rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.82rem;
            gap: 0.6rem;
        }
        @media screen and (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.8rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media screen and (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            padding: 1rem 0 0.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.5rem;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--text-primary);
            font-weight: 500;
        }
        .breadcrumb .sep {
            color: var(--border-color);
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 0.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 文章锚点 ===== */
        .article-anchor {
            scroll-margin-top: calc(var(--header-height) + 16px);
        }

        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: var(--max-width);
            padding-left: 24px;
            padding-right: 24px;
        }
        @media screen and (max-width: 640px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        .cell {
            margin-bottom: 0;
        }
        .grid-x>.cell {
            padding: 0;
        }