/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0d2b4a;
            --color-primary-light: #1a4a7a;
            --color-secondary: #1e6bb8;
            --color-secondary-light: #3a8ad9;
            --color-accent: #e8a838;
            --color-accent-light: #f0c060;
            --color-bg: #f5f7fa;
            --color-bg-alt: #eef1f6;
            --color-bg-dark: #0a1a2e;
            --color-card: #ffffff;
            --color-text: #1a2332;
            --color-text-weak: #6b7a8f;
            --color-text-light: #a0b0c4;
            --color-text-on-dark: #f0f4fa;
            --color-border: #e2e8f0;
            --color-border-light: #f0f2f5;
            --color-success: #2d8a4e;
            --color-error: #c0392b;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-size-xs: 0.75rem;
            --font-size-sm: 0.875rem;
            --font-size-base: 1rem;
            --font-size-md: 1.125rem;
            --font-size-lg: 1.375rem;
            --font-size-xl: 1.75rem;
            --font-size-2xl: 2.25rem;
            --font-size-3xl: 3rem;
            --font-size-4xl: 3.75rem;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --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, 0.16);
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: var(--font-size-base);
            line-height: 1.7;
            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; }
        a { color: var(--color-secondary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--color-primary-light); }
        a:focus-visible { outline: 2px solid var(--color-secondary); outline-offset: 2px; border-radius: 2px; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--color-primary); }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .container-narrow { max-width: 840px; margin: 0 auto; padding: 0 var(--spacing-md); }
        .container-wide { max-width: 1360px; margin: 0 auto; padding: 0 var(--spacing-md); }

        /* ===== 导航系统 ===== */
        .site-header {
            background: var(--color-card);
            box-shadow: 0 1px 0 var(--color-border);
            position: relative;
            z-index: 100;
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            border-bottom: 1px solid var(--color-border-light);
        }
        .header-top .container-wide { display: flex; align-items: center; justify-content: space-between; width: 100%; }
        .site-logo { display: flex; align-items: center; gap: 0.5rem; }
        .site-logo .logo-icon {
            width: 40px; height: 40px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: var(--radius-sm);
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-size: 1.25rem; font-weight: 800;
            flex-shrink: 0;
        }
        .site-logo .logo-text {
            font-size: var(--font-size-md);
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .header-actions { display: flex; align-items: center; gap: var(--spacing-sm); }
        .header-search {
            display: flex; align-items: center;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: 50px;
            padding: 0.25rem 0.25rem 0.25rem 1rem;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .header-search:focus-within { border-color: var(--color-secondary); box-shadow: 0 0 0 3px rgba(30, 107, 184, 0.15); }
        .header-search input {
            border: none; background: transparent; padding: 0.4rem 0; min-width: 140px;
            font-size: var(--font-size-sm); color: var(--color-text);
            outline: none;
        }
        .header-search input::placeholder { color: var(--color-text-light); }
        .header-search button {
            background: var(--color-secondary); color: #fff;
            border-radius: 50px; padding: 0.4rem 1rem; font-size: var(--font-size-sm);
            font-weight: 600; transition: background var(--transition);
            white-space: nowrap;
        }
        .header-search button:hover { background: var(--color-primary-light); }
        .header-search button i { margin-right: 0.25rem; }

        .btn-cta-nav {
            background: linear-gradient(135deg, var(--color-accent), #d4942b);
            color: #fff; padding: 0.5rem 1.25rem; border-radius: 50px;
            font-weight: 600; font-size: var(--font-size-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            white-space: nowrap; display: inline-flex; align-items: center; gap: 0.4rem;
        }
        .btn-cta-nav:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(232, 168, 56, 0.35); color: #fff; }

        /* 第二层导航 - 频道Tabs */
        .nav-tabs-bar {
            background: var(--color-card);
            border-bottom: 1px solid var(--color-border-light);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-tabs-bar::-webkit-scrollbar { display: none; }
        .nav-tabs {
            display: flex; gap: 0.25rem; padding: 0.5rem 0;
            min-width: max-content;
        }
        .nav-tabs a {
            display: inline-flex; align-items: center; gap: 0.4rem;
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            font-size: var(--font-size-sm);
            font-weight: 500;
            color: var(--color-text-weak);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-tabs a i { font-size: 0.85rem; }
        .nav-tabs a:hover { color: var(--color-secondary); background: rgba(30, 107, 184, 0.06); }
        .nav-tabs a.active {
            color: #fff;
            background: var(--color-primary);
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(13, 43, 74, 0.25);
        }
        .nav-tabs a.active:hover { color: #fff; background: var(--color-primary-light); }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            background: var(--color-bg-dark);
            min-height: 520px;
            display: flex; align-items: center;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.6;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(13, 43, 74, 0.92) 0%, rgba(10, 26, 46, 0.7) 100%);
            z-index: 1;
        }
        .hero .container-wide { position: relative; z-index: 2; width: 100%; padding: var(--spacing-xl) var(--spacing-md); }
        .hero-content { max-width: 720px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 0.5rem;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(6px);
            padding: 0.35rem 1rem 0.35rem 0.75rem;
            border-radius: 50px;
            font-size: var(--font-size-xs);
            color: var(--color-text-on-dark);
            margin-bottom: var(--spacing-md);
            border: 1px solid rgba(255,255,255,0.08);
        }
        .hero-badge i { color: var(--color-accent); }
        .hero h1 {
            font-size: var(--font-size-4xl);
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-sm);
        }
        .hero h1 span { color: var(--color-accent); }
        .hero-desc {
            font-size: var(--font-size-md);
            color: rgba(255,255,255,0.8);
            line-height: 1.7;
            max-width: 600px;
            margin-bottom: var(--spacing-md);
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: var(--spacing-sm); align-items: center; }
        .btn-primary {
            display: inline-flex; align-items: center; gap: 0.5rem;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-primary-light));
            color: #fff; padding: 0.85rem 2rem; border-radius: 50px;
            font-weight: 600; font-size: var(--font-size-base);
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 16px rgba(30, 107, 184, 0.3);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(30, 107, 184, 0.4); color: #fff; }
        .btn-outline-light {
            display: inline-flex; align-items: center; gap: 0.5rem;
            border: 1.5px solid rgba(255,255,255,0.4);
            color: #fff; padding: 0.85rem 2rem; border-radius: 50px;
            font-weight: 600; font-size: var(--font-size-base);
            transition: all var(--transition);
            background: transparent;
        }
        .btn-outline-light:hover { border-color: #fff; background: rgba(255,255,255,0.08); color: #fff; }
        .hero-stats {
            display: flex; flex-wrap: wrap; gap: var(--spacing-lg);
            margin-top: var(--spacing-lg);
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero-stat { text-align: left; }
        .hero-stat .num { font-size: var(--font-size-2xl); font-weight: 800; color: var(--color-accent); line-height: 1.2; }
        .hero-stat .label { font-size: var(--font-size-xs); color: rgba(255,255,255,0.6); text-transform: uppercase; letter-spacing: 0.04em; }

        /* ===== 通用板块 ===== */
        .section { padding: var(--spacing-xl) 0; }
        .section-alt { background: var(--color-bg-alt); }
        .section-dark { background: var(--color-bg-dark); color: var(--color-text-on-dark); }
        .section-dark h2, .section-dark h3, .section-dark h4 { color: #fff; }
        .section-title {
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }
        .section-title h2 {
            font-size: var(--font-size-2xl);
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 0.5rem;
        }
        .section-title .sub {
            color: var(--color-text-weak);
            font-size: var(--font-size-md);
            max-width: 560px;
            margin: 0 auto;
        }
        .section-dark .section-title .sub { color: rgba(255,255,255,0.65); }
        .section-divider {
            width: 60px; height: 4px;
            background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
            border-radius: 4px;
            margin: 0.75rem auto 1rem;
        }

        /* ===== 卡片通用 ===== */
        .card {
            background: var(--color-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            overflow: hidden;
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .card-img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; display: block; }
        .card-body { padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md); }
        .card-body h3 { font-size: var(--font-size-lg); margin-bottom: 0.5rem; }
        .card-body p { color: var(--color-text-weak); font-size: var(--font-size-sm); line-height: 1.7; }
        .card-tag {
            display: inline-block;
            background: rgba(30, 107, 184, 0.1);
            color: var(--color-secondary);
            font-size: var(--font-size-xs);
            font-weight: 600;
            padding: 0.2rem 0.75rem;
            border-radius: 50px;
            margin-bottom: 0.5rem;
        }

        /* ===== 分类卡片网格 ===== */
        .cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing-md); }
        .cat-card {
            background: var(--color-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .cat-card-img {
            width: 100%; height: 200px; object-fit: cover;
            transition: transform 0.4s ease;
        }
        .cat-card:hover .cat-card-img { transform: scale(1.03); }
        .cat-card-body { padding: var(--spacing-md); }
        .cat-card-body h3 { font-size: var(--font-size-lg); margin-bottom: 0.35rem; }
        .cat-card-body p { color: var(--color-text-weak); font-size: var(--font-size-sm); margin-bottom: var(--spacing-sm); }
        .cat-link {
            display: inline-flex; align-items: center; gap: 0.3rem;
            font-weight: 600; font-size: var(--font-size-sm);
            color: var(--color-secondary);
        }
        .cat-link i { font-size: 0.75rem; transition: transform var(--transition); }
        .cat-link:hover i { transform: translateX(4px); }

        /* ===== 特色功能 ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); }
        .feature-item {
            background: var(--color-card);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--color-border-light);
        }
        .feature-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .feature-icon {
            width: 60px; height: 60px;
            background: linear-gradient(135deg, rgba(30, 107, 184, 0.1), rgba(13, 43, 74, 0.05));
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto var(--spacing-sm);
            font-size: 1.5rem;
            color: var(--color-secondary);
        }
        .feature-item h3 { font-size: var(--font-size-md); margin-bottom: 0.5rem; }
        .feature-item p { font-size: var(--font-size-sm); color: var(--color-text-weak); line-height: 1.7; }

        /* ===== 流程步骤 ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); position: relative; }
        .step-card {
            text-align: center;
            position: relative;
        }
        .step-num {
            width: 48px; height: 48px;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-primary-light));
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-weight: 800; font-size: var(--font-size-lg);
            margin: 0 auto var(--spacing-sm);
            box-shadow: 0 4px 12px rgba(30, 107, 184, 0.25);
        }
        .step-card h4 { font-size: var(--font-size-md); margin-bottom: 0.35rem; }
        .step-card p { font-size: var(--font-size-sm); color: var(--color-text-weak); }

        /* ===== 资讯列表 ===== */
        .news-list { display: flex; flex-direction: column; gap: var(--spacing-sm); }
        .news-item {
            display: flex; align-items: flex-start; gap: var(--spacing-md);
            background: var(--color-card);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .news-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .news-thumb {
            width: 120px; height: 80px; border-radius: var(--radius-sm);
            object-fit: cover; flex-shrink: 0;
        }
        .news-info { flex: 1; min-width: 0; }
        .news-info h3 { font-size: var(--font-size-base); margin-bottom: 0.25rem; }
        .news-info h3 a { color: var(--color-text); }
        .news-info h3 a:hover { color: var(--color-secondary); }
        .news-meta { display: flex; flex-wrap: wrap; gap: 0.75rem; font-size: var(--font-size-xs); color: var(--color-text-light); }
        .news-meta span { display: inline-flex; align-items: center; gap: 0.25rem; }
        .news-empty {
            text-align: center; padding: var(--spacing-lg); color: var(--color-text-weak);
            background: var(--color-card); border-radius: var(--radius-md);
        }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); }
        .stat-card {
            text-align: center;
            background: rgba(255,255,255,0.05);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            border: 1px solid rgba(255,255,255,0.06);
            backdrop-filter: blur(4px);
        }
        .stat-card .num { font-size: var(--font-size-3xl); font-weight: 800; color: var(--color-accent); line-height: 1.2; }
        .stat-card .label { font-size: var(--font-size-sm); color: rgba(255,255,255,0.65); margin-top: 0.25rem; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: var(--spacing-sm); }
        .faq-item {
            background: var(--color-card);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }
        .faq-q {
            font-weight: 600; font-size: var(--font-size-base);
            display: flex; align-items: center; gap: 0.5rem;
            color: var(--color-primary);
        }
        .faq-q i { color: var(--color-secondary); font-size: 0.85rem; }
        .faq-a {
            margin-top: 0.5rem; padding-left: 1.5rem;
            color: var(--color-text-weak); font-size: var(--font-size-sm);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary), #0a1a2e);
            padding: var(--spacing-xl) 0;
            text-align: center;
        }
        .cta-section h2 { font-size: var(--font-size-2xl); color: #fff; margin-bottom: 0.75rem; }
        .cta-section p { color: rgba(255,255,255,0.7); font-size: var(--font-size-md); max-width: 540px; margin: 0 auto var(--spacing-md); }
        .cta-actions { display: flex; flex-wrap: wrap; gap: var(--spacing-sm); justify-content: center; }
        .btn-cta {
            display: inline-flex; align-items: center; gap: 0.5rem;
            background: var(--color-accent); color: var(--color-primary);
            padding: 0.9rem 2.5rem; border-radius: 50px;
            font-weight: 700; font-size: var(--font-size-base);
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 16px rgba(232, 168, 56, 0.3);
        }
        .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(232, 168, 56, 0.45); color: var(--color-primary); }
        .btn-cta-outline {
            display: inline-flex; align-items: center; gap: 0.5rem;
            border: 1.5px solid rgba(255,255,255,0.3);
            color: #fff; padding: 0.9rem 2.5rem; border-radius: 50px;
            font-weight: 600; font-size: var(--font-size-base);
            transition: all var(--transition);
            background: transparent;
        }
        .btn-cta-outline:hover { border-color: #fff; background: rgba(255,255,255,0.06); color: #fff; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255,255,255,0.7);
            padding: var(--spacing-lg) 0 var(--spacing-md);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--spacing-lg); }
        .footer-brand .logo-text { color: #fff; font-size: var(--font-size-md); font-weight: 700; margin-bottom: 0.75rem; display: block; }
        .footer-brand p { font-size: var(--font-size-sm); line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: var(--font-size-sm); font-weight: 600; margin-bottom: var(--spacing-sm); text-transform: uppercase; letter-spacing: 0.04em; }
        .footer-col ul li { margin-bottom: 0.4rem; }
        .footer-col ul li a { color: rgba(255,255,255,0.55); font-size: var(--font-size-sm); transition: color var(--transition); }
        .footer-col ul li a:hover { color: var(--color-accent); }
        .footer-bottom {
            margin-top: var(--spacing-lg);
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255,255,255,0.06);
            display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
            gap: var(--spacing-sm);
            font-size: var(--font-size-xs);
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--color-accent); }

        /* ===== 响应式 ===== */

        /* 平板 1024px */
        @media (max-width: 1024px) {
            .hero h1 { font-size: var(--font-size-3xl); }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-lg); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-lg); }
        }

        /* 平板 768px */
        @media (max-width: 768px) {
            :root {
                --font-size-4xl: 2.5rem;
                --font-size-3xl: 2rem;
                --font-size-2xl: 1.75rem;
                --spacing-xl: 3.5rem;
                --spacing-lg: 2.5rem;
            }
            .header-top .container-wide { flex-wrap: wrap; gap: 0.5rem; }
            .header-actions { width: 100%; justify-content: flex-end; }
            .header-search input { min-width: 100px; }
            .hero { min-height: 420px; }
            .hero h1 { font-size: var(--font-size-3xl); }
            .hero-stats { gap: var(--spacing-md); }
            .hero-stat .num { font-size: var(--font-size-xl); }
            .cat-grid { grid-template-columns: 1fr; }
            .features-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .news-item { flex-direction: column; }
            .news-thumb { width: 100%; height: 160px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* 手机 520px */
        @media (max-width: 520px) {
            :root {
                --font-size-4xl: 2rem;
                --font-size-3xl: 1.6rem;
                --font-size-2xl: 1.4rem;
                --font-size-xl: 1.2rem;
                --spacing-xl: 2.5rem;
                --spacing-lg: 2rem;
                --spacing-md: 1.25rem;
            }
            .header-top { padding: 0.5rem 0; }
            .site-logo .logo-text { font-size: var(--font-size-base); }
            .header-search { display: none; }
            .btn-cta-nav { padding: 0.4rem 0.9rem; font-size: var(--font-size-xs); }
            .nav-tabs a { padding: 0.35rem 0.9rem; font-size: var(--font-size-xs); }
            .hero { min-height: 340px; }
            .hero .container-wide { padding: var(--spacing-md) var(--spacing-sm); }
            .hero h1 { font-size: var(--font-size-2xl); }
            .hero-desc { font-size: var(--font-size-sm); }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .hero-actions .btn-primary, .hero-actions .btn-outline-light { justify-content: center; }
            .hero-stats { flex-direction: column; gap: var(--spacing-sm); }
            .cat-card-img { height: 150px; }
            .features-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; gap: var(--spacing-md); }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-sm); }
            .stat-card .num { font-size: var(--font-size-2xl); }
            .news-thumb { height: 120px; }
            .faq-item { padding: var(--spacing-sm); }
            .cta-section h2 { font-size: var(--font-size-xl); }
            .cta-actions { flex-direction: column; align-items: stretch; }
            .cta-actions .btn-cta, .cta-actions .btn-cta-outline { justify-content: center; }
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-brand p { max-width: 100%; }
        }

        /* ===== 辅助类 ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: var(--spacing-sm); }
        .mt-2 { margin-top: var(--spacing-md); }
        .mb-1 { margin-bottom: var(--spacing-sm); }
        .mb-2 { margin-bottom: var(--spacing-md); }
        .gap-sm { gap: var(--spacing-sm); }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #e8a838;
            --accent-light: #f0c060;
            --accent-dark: #c88a28;
            --bg-body: #f8f9fb;
            --bg-white: #ffffff;
            --bg-light: #eef1f5;
            --bg-dark: #1a2a3a;
            --text-dark: #1a2a3a;
            --text-body: #3a4a5a;
            --text-light: #6a7a8a;
            --text-white: #f0f2f5;
            --border-color: #dce1e8;
            --border-light: #e8ecf0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26, 42, 58, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 42, 58, 0.08);
            --shadow-lg: 0 12px 40px rgba(26, 42, 58, 0.10);
            --shadow-accent: 0 4px 16px rgba(232, 168, 56, 0.25);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            --container-max: 1200px;
            --header-top-height: 64px;
            --nav-tabs-height: 48px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }
        p {
            margin-bottom: 1rem;
        }
        /* ===== 容器 ===== */
        .container-wide {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container-wide {
                padding: 0 16px;
            }
        }

        /* ===== Header ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }
        .header-top {
            height: var(--header-top-height);
            display: flex;
            align-items: center;
            border-bottom: 1px solid var(--border-light);
            background: var(--bg-white);
        }
        .header-top .container-wide {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .site-logo:hover {
            opacity: 0.92;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: var(--accent);
            font-weight: 800;
            font-size: 1.25rem;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: border var(--transition), box-shadow var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(232, 168, 56, 0.15);
        }
        .header-search input {
            padding: 8px 14px;
            background: transparent;
            border: none;
            min-width: 180px;
            color: var(--text-dark);
            font-size: 0.9rem;
        }
        .header-search input::placeholder {
            color: var(--text-light);
        }
        .header-search button {
            padding: 8px 16px;
            background: var(--primary);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: background var(--transition);
            border: none;
        }
        .header-search button:hover {
            background: var(--primary-light);
        }
        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            background: var(--accent);
            color: var(--text-dark);
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-cta-nav:hover {
            background: var(--accent-light);
            transform: translateY(-1px);
            box-shadow: var(--shadow-accent);
            color: var(--text-dark);
        }
        .btn-cta-nav i {
            font-size: 1.05rem;
        }

        /* ===== 导航 Tabs ===== */
        .nav-tabs-bar {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
        }
        .nav-tabs {
            display: flex;
            gap: 4px;
            padding: 6px 0;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
        }
        .nav-tabs::-webkit-scrollbar {
            height: 3px;
        }
        .nav-tabs::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }
        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 20px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            text-decoration: none;
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .nav-tabs a i {
            font-size: 0.95rem;
            color: var(--text-light);
            transition: color var(--transition);
        }
        .nav-tabs a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }
        .nav-tabs a:hover i {
            color: var(--primary);
        }
        .nav-tabs a.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .nav-tabs a.active i {
            color: var(--accent);
        }
        .nav-tabs a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== 页面横幅 ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 60px 0 50px;
            position: relative;
            overflow: hidden;
            min-height: 220px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .page-banner .container-wide {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 16px;
        }
        .page-banner .breadcrumb a {
            color: var(--accent);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--accent-light);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 40px 0 36px;
                min-height: 180px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 70px 0;
        }
        .section-alt {
            background: var(--bg-light);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-title {
            color: #fff;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            text-align: center;
        }
        .section-sub {
            text-align: center;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto 48px;
            font-size: 1.05rem;
            line-height: 1.7;
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.7);
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-sub {
                margin-bottom: 32px;
                font-size: 0.95rem;
            }
        }

        /* ===== 内容卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card-grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        @media (max-width: 1024px) {
            .card-grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .card-grid,
            .card-grid-3,
            .card-grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: var(--bg-light);
        }
        .card-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
        }
        .card-body p {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.65;
            flex: 1;
            margin-bottom: 12px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-light);
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .card-meta i {
            margin-right: 4px;
        }
        .card-tag {
            display: inline-block;
            padding: 3px 12px;
            background: var(--bg-light);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 20px;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        /* ===== 步骤/流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 28px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: var(--accent);
            font-size: 1.3rem;
            font-weight: 800;
            border-radius: 50%;
            margin-bottom: 16px;
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.6;
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .step-item {
                padding: 20px 14px;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 16px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background var(--transition);
            border: none;
            background: transparent;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            background: var(--bg-light);
        }
        .faq-question::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open::after {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 16px;
            font-size: 0.92rem;
            color: var(--text-body);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 64px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-section .container-wide {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--text-dark);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-accent);
            color: var(--text-dark);
        }
        .btn-secondary {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: translateY(-2px);
            color: #fff;
        }
        @media (max-width: 520px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo-text {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0 24px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: var(--accent);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 统计数字 ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 24px 12px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* ===== 内容列表 ===== */
        .content-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .content-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .content-item:last-child {
            border-bottom: none;
        }
        .content-item .item-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.2rem;
        }
        .content-item .item-text h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-dark);
        }
        .content-item .item-text p {
            font-size: 0.9rem;
            color: var(--text-body);
            margin-bottom: 0;
        }
        @media (max-width: 520px) {
            .content-item {
                flex-direction: column;
                gap: 10px;
            }
        }

        /* ===== 标签组 ===== */
        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 16px;
        }
        .tag {
            display: inline-block;
            padding: 6px 18px;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-body);
            transition: background var(--transition), color var(--transition), border var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 移动端导航增强 ===== */
        @media (max-width: 768px) {
            .header-top .container-wide {
                flex-wrap: wrap;
                gap: 8px;
                padding: 8px 16px;
            }
            .header-top {
                height: auto;
                min-height: var(--header-top-height);
            }
            .header-actions {
                width: 100%;
                justify-content: space-between;
                gap: 8px;
                flex-wrap: wrap;
            }
            .header-search {
                flex: 1;
                min-width: 140px;
            }
            .header-search input {
                min-width: 80px;
                width: 100%;
                padding: 6px 10px;
                font-size: 0.85rem;
            }
            .header-search button {
                padding: 6px 12px;
                font-size: 0.8rem;
            }
            .btn-cta-nav {
                padding: 6px 16px;
                font-size: 0.85rem;
            }
            .nav-tabs {
                padding: 4px 0;
                gap: 2px;
            }
            .nav-tabs a {
                padding: 6px 14px;
                font-size: 0.82rem;
                gap: 4px;
            }
            .nav-tabs a i {
                font-size: 0.8rem;
            }
            .logo-text {
                font-size: 1rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .header-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .header-search {
                width: 100%;
            }
            .header-search input {
                min-width: 0;
            }
            .btn-cta-nav {
                justify-content: center;
                text-align: center;
                width: 100%;
            }
            .nav-tabs a {
                padding: 5px 10px;
                font-size: 0.78rem;
            }
        }

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

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a45;
            --accent: #e8a838;
            --accent-light: #f0c060;
            --accent-dark: #c88a20;
            --bg-body: #f5f7fc;
            --bg-white: #ffffff;
            --bg-light: #eef1f8;
            --bg-dark: #141c30;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8888a0;
            --text-white: #ffffff;
            --border-color: #dce0e8;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-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;
        }

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

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover { color: var(--accent); }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

        ul, ol { list-style: none; }

        /* ===== 容器 ===== */
        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        .container-narrow {
            max-width: 880px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        /* ===== 头部导航 ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }

        .header-top {
            padding: 0.75rem 0;
            border-bottom: 1px solid var(--border-color);
            background: var(--bg-white);
        }

        .header-top .container-wide {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            text-decoration: none;
            flex-shrink: 0;
        }
        .site-logo:hover {
            opacity: 0.9;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: var(--text-white);
            border-radius: var(--radius-md);
            font-weight: 800;
            font-size: 1.3rem;
            box-shadow: 0 4px 12px rgba(26, 42, 108, 0.3);
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 50px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26, 42, 108, 0.1);
        }

        .header-search input[type="search"] {
            border: none;
            background: transparent;
            padding: 0.5rem 1rem;
            min-width: 160px;
            color: var(--text-primary);
            outline: none;
            font-size: 0.9rem;
        }
        .header-search input[type="search"]::placeholder {
            color: var(--text-muted);
        }

        .header-search button {
            border: none;
            background: transparent;
            padding: 0.5rem 1rem;
            color: var(--primary-light);
            cursor: pointer;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            transition: background var(--transition);
        }
        .header-search button:hover {
            background: rgba(26, 42, 108, 0.06);
        }

        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1.25rem;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--text-white) !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 14px rgba(232, 168, 56, 0.35);
            transition: transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-cta-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(232, 168, 56, 0.45);
            color: var(--text-white) !important;
        }
        .btn-cta-nav:active {
            transform: translateY(0);
        }

        /* 第二行 - 频道 Tabs */
        .nav-tabs-bar {
            background: var(--bg-white);
            padding: 0.4rem 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-tabs-bar::-webkit-scrollbar { display: none; }

        .nav-tabs {
            display: flex;
            gap: 0.25rem;
            align-items: center;
        }

        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.55rem 1.25rem;
            border-radius: 50px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            white-space: nowrap;
            text-decoration: none;
            transition: background var(--transition), color var(--transition), box-shadow var(--transition);
        }
        .nav-tabs a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }
        .nav-tabs a.active {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 14px rgba(26, 42, 108, 0.25);
        }
        .nav-tabs a i {
            font-size: 0.85rem;
        }

        /* ===== Banner 板块 ===== */
        .article-banner {
            position: relative;
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .article-banner .container-narrow {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-banner .category-badge {
            display: inline-block;
            padding: 0.3rem 1rem;
            background: rgba(232, 168, 56, 0.2);
            color: var(--accent-light);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(232, 168, 56, 0.3);
            margin-bottom: var(--spacing-sm);
        }
        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.3;
            margin-bottom: var(--spacing-sm);
            text-shadow: 0 2px 20px rgba(0,0,0,0.25);
        }
        .article-banner .meta-info {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: var(--spacing-md);
            color: rgba(255,255,255,0.8);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-banner .meta-info i {
            margin-right: 0.3rem;
            color: var(--accent);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            padding: 0.75rem 0;
        }
        .breadcrumb-wrap .container-narrow {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .breadcrumb-wrap a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb-wrap a:hover {
            color: var(--primary);
        }
        .breadcrumb-wrap .sep {
            color: var(--border-color);
        }
        .breadcrumb-wrap .current {
            color: var(--text-secondary);
            font-weight: 500;
            max-width: 300px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 文章正文 ===== */
        .article-main {
            padding: var(--spacing-lg) 0;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-md);
        }
        .article-body .article-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
            line-height: 1.35;
        }
        .article-body .article-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            flex-wrap: wrap;
            padding-bottom: var(--spacing-md);
            margin-bottom: var(--spacing-md);
            border-bottom: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-body .article-meta i {
            margin-right: 0.3rem;
            color: var(--accent);
        }
        .article-body .article-meta .cat-link {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            background: var(--bg-light);
            border-radius: 50px;
            color: var(--primary-light);
            font-weight: 500;
            font-size: 0.8rem;
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-content p {
            margin-bottom: 1.25rem;
        }
        .article-content h2, .article-content h3 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 700;
            color: var(--primary);
        }
        .article-content h2 { font-size: 1.5rem; }
        .article-content h3 { font-size: 1.25rem; }
        .article-content ul, .article-content ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4rem;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4rem;
        }
        .article-content a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover {
            color: var(--accent);
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: var(--spacing-sm) var(--spacing-md);
            background: var(--bg-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5rem 0;
            color: var(--text-secondary);
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content pre, .article-content code {
            background: var(--bg-dark);
            color: #e8e8f0;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
        }
        .article-content pre {
            padding: var(--spacing-md);
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        .article-content code {
            padding: 0.2rem 0.5rem;
        }

        /* 文章未找到 */
        .not-found-box {
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-md);
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }
        .not-found-box i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: var(--spacing-sm);
        }
        .not-found-box h2 {
            font-size: 1.6rem;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: var(--spacing-md);
        }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 2rem;
            background: var(--primary);
            color: var(--text-white);
            border-radius: 50px;
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }
        .not-found-box .btn-back:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            color: var(--text-white);
        }

        /* ===== 标签区域 ===== */
        .tags-section {
            margin-top: var(--spacing-md);
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        .tags-section .label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .tags-section .tag-item {
            display: inline-block;
            padding: 0.3rem 0.9rem;
            background: var(--bg-light);
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition);
            text-decoration: none;
        }
        .tags-section .tag-item:hover {
            background: var(--primary);
            color: var(--text-white);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: var(--spacing-lg) 0;
            background: var(--bg-white);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-md);
            text-align: center;
        }
        .related-section .section-title span {
            color: var(--accent);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }
        .related-card {
            background: var(--bg-body);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .related-card .card-body {
            padding: var(--spacing-sm);
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.3rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ===== CTA 板块 ===== */
        .cta-section {
            padding: var(--spacing-lg) 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }
        .cta-section .container-narrow {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
        }
        .cta-section p {
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            margin: 0 auto var(--spacing-md);
            font-size: 1.05rem;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.7rem;
            padding: 0.85rem 2.5rem;
            background: var(--accent);
            color: var(--text-white);
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 6px 24px rgba(232, 168, 56, 0.4);
            transition: transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(232, 168, 56, 0.5);
            color: var(--text-white);
        }
        .cta-section .btn-cta i {
            font-size: 1.1rem;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: var(--spacing-lg) 0 var(--spacing-md);
        }
        .site-footer .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        .footer-brand .logo-text {
            color: var(--text-white);
            font-size: 1.3rem;
            display: block;
            margin-bottom: var(--spacing-sm);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: var(--spacing-sm);
            position: relative;
            padding-bottom: 0.5rem;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            text-decoration: none;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: var(--spacing-md);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            font-size: 0.85rem;
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.55);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
            .article-banner h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-lg: 2.5rem;
                --spacing-xl: 4rem;
            }

            .header-top .container-wide {
                flex-direction: column;
                align-items: stretch;
            }
            .site-logo {
                justify-content: center;
            }
            .header-actions {
                justify-content: center;
            }
            .header-search input[type="search"] {
                min-width: 120px;
            }

            .nav-tabs {
                justify-content: flex-start;
                padding-bottom: 0.2rem;
            }
            .nav-tabs a {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }

            .article-banner {
                min-height: 240px;
                padding: var(--spacing-lg) 0;
            }
            .article-banner h1 {
                font-size: 1.5rem;
            }
            .article-banner .meta-info {
                font-size: 0.8rem;
                gap: var(--spacing-sm);
            }

            .article-body {
                padding: var(--spacing-md);
            }
            .article-body .article-title {
                font-size: 1.4rem;
            }
            .article-content {
                font-size: 1rem;
            }

            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .related-card .card-body h4 {
                font-size: 0.9rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section .btn-cta {
                padding: 0.7rem 1.8rem;
                font-size: 0.95rem;
            }

            .breadcrumb-wrap .current {
                max-width: 180px;
            }
        }

        @media (max-width: 520px) {
            .header-search input[type="search"] {
                min-width: 80px;
                width: 100px;
            }
            .header-search button span {
                display: none;
            }
            .btn-cta-nav {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
            .logo-text {
                font-size: 1rem;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1.1rem;
            }

            .article-banner h1 {
                font-size: 1.25rem;
            }
            .article-body {
                padding: var(--spacing-sm);
                border-radius: var(--radius-md);
            }
            .article-body .article-title {
                font-size: 1.2rem;
            }
            .article-body .article-meta {
                font-size: 0.8rem;
                gap: var(--spacing-xs);
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-sm);
            }

            .nav-tabs a {
                font-size: 0.75rem;
                padding: 0.35rem 0.8rem;
            }
            .nav-tabs a i {
                font-size: 0.75rem;
            }

            .breadcrumb-wrap .current {
                max-width: 120px;
                font-size: 0.8rem;
            }

            .cta-section h2 {
                font-size: 1.25rem;
            }
            .cta-section p {
                font-size: 0.9rem;
            }
        }

/* roulang page: category2 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #0f4c81;
            --primary-light: #1a6bb0;
            --primary-dark: #0a355e;
            --secondary: #e8a838;
            --secondary-light: #f0c36d;
            --accent: #2ecc71;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-alt: #f0f4f8;
            --bg-dark: #0b2a44;
            --text-primary: #1a2b3c;
            --text-secondary: #4a5a6a;
            --text-muted: #8a9aaa;
            --text-white: #f0f4f8;
            --border-light: #e2e8f0;
            --border-medium: #c8d4e0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 6px rgba(15, 76, 129, 0.06);
            --shadow-md: 0 8px 28px rgba(15, 76, 129, 0.10);
            --shadow-lg: 0 18px 48px rgba(15, 76, 129, 0.14);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --header-top-bg: #ffffff;
            --nav-bg: #0f4c81;
            --nav-text: #ffffff;
            --nav-active-bg: rgba(255, 255, 255, 0.18);
            --footer-bg: #0b2a44;
            --footer-text: #c8d4e0;
        }

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

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

        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -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-light);
        }
        a:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container-wide {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 28px;
        }

        .container-narrow {
            max-width: 920px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ===== 排版辅助 ===== */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
        }

        .section-sub {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 2.5rem;
        }

        .text-center {
            text-align: center;
        }
        .text-center .section-sub {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Header 顶部行 ===== */
        .site-header {
            background: var(--header-top-bg);
            box-shadow: 0 2px 12px rgba(15, 76, 129, 0.06);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-top {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .header-top .container-wide {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px 20px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .site-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.3rem;
            border-radius: var(--radius-sm);
            letter-spacing: -0.02em;
        }
        .site-logo .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }

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

        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 40px;
            padding: 2px 2px 2px 18px;
            border: 1px solid var(--border-light);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(15, 76, 129, 0.12);
        }
        .header-search input {
            border: none;
            background: transparent;
            padding: 8px 0;
            min-width: 140px;
            font-size: 0.9rem;
            color: var(--text-primary);
            outline: none;
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .header-search button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: background var(--transition), transform var(--transition);
        }
        .header-search button:hover {
            background: var(--primary-light);
            transform: scale(1.02);
        }
        .header-search button:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }

        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--secondary);
            color: #1a2b3c !important;
            padding: 10px 22px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .btn-cta-nav:hover {
            background: var(--secondary-light);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .btn-cta-nav:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== 导航频道 Tabs ===== */
        .nav-tabs-bar {
            background: var(--nav-bg);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-tabs-bar::-webkit-scrollbar {
            display: none;
        }

        .nav-tabs {
            display: flex;
            gap: 4px;
            padding: 8px 0;
            white-space: nowrap;
        }
        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            color: var(--nav-text);
            font-size: 0.95rem;
            font-weight: 500;
            border-radius: 40px;
            transition: background var(--transition), color var(--transition);
            text-decoration: none;
            opacity: 0.85;
        }
        .nav-tabs a i {
            font-size: 1rem;
        }
        .nav-tabs a:hover {
            background: var(--nav-active-bg);
            opacity: 1;
            color: #fff;
        }
        .nav-tabs a.active {
            background: var(--nav-active-bg);
            opacity: 1;
            color: #fff;
            font-weight: 600;
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2);
        }
        .nav-tabs a:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 40px;
        }

        /* ===== Banner 内页横幅 ===== */
        .page-banner {
            position: relative;
            background: var(--bg-dark);
            min-height: 280px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 60px 28px;
            overflow: hidden;
        }
        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 1;
        }
        .page-banner::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 42, 68, 0.88) 0%, rgba(15, 76, 129, 0.72) 100%);
            z-index: 2;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 3;
            max-width: 780px;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 580px;
            margin: 0 auto 1.5rem;
        }
        .page-banner .banner-badge {
            display: inline-block;
            background: var(--secondary);
            color: #1a2b3c;
            padding: 4px 18px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.3px;
            margin-bottom: 1rem;
        }

        /* ===== 板块间距 ===== */
        .section-block {
            padding: 80px 0;
        }
        .section-block.alt-bg {
            background: var(--bg-alt);
        }
        .section-block.white-bg {
            background: var(--bg-white);
        }

        /* ===== 功能卡片网格 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 28px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            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 .fc-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: var(--bg-alt);
            color: var(--primary);
            font-size: 1.6rem;
            margin-bottom: 1rem;
            transition: background var(--transition), color var(--transition);
        }
        .feature-card:hover .fc-icon {
            background: var(--primary);
            color: #fff;
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: var(--text-primary);
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 安全设置双栏 ===== */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .security-item {
            display: flex;
            gap: 20px;
            background: var(--bg-white);
            padding: 28px 24px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            align-items: flex-start;
        }
        .security-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .security-item .si-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            background: var(--bg-alt);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            transition: background var(--transition), color var(--transition);
        }
        .security-item:hover .si-icon {
            background: var(--primary);
            color: #fff;
        }
        .security-item .si-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.3rem;
        }
        .security-item .si-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0.6rem;
        }
        .security-item .si-content .si-status {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 40px;
            background: #e8f5e9;
            color: #2e7d32;
        }
        .security-item .si-content .si-status.warning {
            background: #fff8e1;
            color: #f57f17;
        }
        .security-item .si-content .si-status.muted {
            background: var(--bg-alt);
            color: var(--text-muted);
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            top: 12px;
            left: 16px;
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--border-light);
            line-height: 1;
            transition: color var(--transition);
        }
        .step-card:hover::before {
            color: var(--primary);
        }
        .step-card .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 0.75rem;
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.3rem;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 常见问题 FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: -2px;
        }
        .faq-question i {
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA 区块 ===== */
        .cta-block {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
            padding: 80px 28px;
            text-align: center;
        }
        .cta-block::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 1;
        }
        .cta-block .container-wide {
            position: relative;
            z-index: 2;
        }
        .cta-block h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }
        .cta-block p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 2rem;
        }
        .cta-block .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--secondary);
            color: #1a2b3c !important;
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
        }
        .cta-block .btn-cta-primary:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(232, 168, 56, 0.3);
        }
        .cta-block .btn-cta-primary:focus-visible {
            outline: 3px solid #fff;
            outline-offset: 4px;
        }

        /* ===== 安全提示标签 ===== */
        .badge-tip {
            display: inline-block;
            background: rgba(46, 204, 113, 0.12);
            color: #1a7a3a;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.2px;
        }
        .badge-tip.blue {
            background: rgba(15, 76, 129, 0.10);
            color: var(--primary);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--footer-bg);
            color: var(--footer-text);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 0.75rem;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--footer-text);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            color: var(--footer-text);
            font-size: 0.88rem;
            transition: color var(--transition), padding-left var(--transition);
            display: inline-block;
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--footer-text);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .container-wide {
                padding: 0 18px;
            }
            .header-top .container-wide {
                flex-direction: column;
                align-items: stretch;
            }
            .header-actions {
                justify-content: space-between;
            }
            .header-search input {
                min-width: 100px;
            }
            .nav-tabs a {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .nav-tabs a i {
                font-size: 0.85rem;
            }
            .page-banner {
                min-height: 220px;
                padding: 40px 18px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .section-block {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
            .feature-grid {
                grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
                gap: 20px;
            }
            .security-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
                gap: 16px;
            }
            .cta-block h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.92rem;
            }
        }

        @media (max-width: 520px) {
            .header-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .header-search {
                width: 100%;
            }
            .header-search input {
                min-width: 0;
                width: 1px;
                flex: 1;
            }
            .btn-cta-nav {
                justify-content: center;
                padding: 10px 16px;
                font-size: 0.85rem;
            }
            .nav-tabs a {
                padding: 6px 12px;
                font-size: 0.8rem;
                gap: 4px;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .page-banner .banner-badge {
                font-size: 0.75rem;
                padding: 2px 14px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .feature-card {
                padding: 24px 18px;
            }
            .security-item {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .cta-block .btn-cta-primary {
                padding: 14px 24px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
        }