/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f4c75;
            --primary-dark: #0a3553;
            --primary-light: #1a6b9e;
            --accent: #f0a500;
            --accent-light: #ffc233;
            --accent-dark: #d48e00;
            --bg: #f4f6f9;
            --bg-card: #ffffff;
            --bg-sidebar: #0f4c75;
            --bg-sidebar-hover: #1a6b9e;
            --text: #1a1a2e;
            --text-light: #6b7280;
            --text-white: #f0f4f8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 18px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 36px rgba(0,0,0,0.10);
            --shadow-sidebar: 2px 0 24px rgba(0,0,0,0.08);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            color: var(--text-white);
            padding: 32px 20px;
            display: flex;
            flex-direction: column;
            z-index: 1000;
            box-shadow: var(--shadow-sidebar);
            transition: transform var(--transition);
            overflow-y: auto;
        }
        .sidebar-logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.12);
            margin-bottom: 28px;
            letter-spacing: 0.5px;
        }
        .sidebar-logo i { font-size: 28px; color: var(--accent); }
        .sidebar-logo span { background: linear-gradient(135deg, #fff 60%, var(--accent-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .sidebar-nav { display: flex; flex-direction: column; gap: 6px; flex: 1; }
        .sidebar-nav a {
            color: rgba(255,255,255,0.75);
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; }
        .sidebar-nav a:hover { background: var(--bg-sidebar-hover); color: #fff; transform: translateX(4px); }
        .sidebar-nav a.active { background: rgba(255,255,255,0.15); color: #fff; border-left: 3px solid var(--accent); }
        .sidebar-footer {
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 13px;
            color: rgba(255,255,255,0.45);
            text-align: center;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
            background: var(--bg-sidebar);
            color: #fff;
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 999;
            box-shadow: 0 2px 12px rgba(0,0,0,0.08);
        }
        .mobile-header .logo-text { font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 10px; }
        .mobile-header .logo-text i { color: var(--accent); font-size: 22px; }
        .hamburger { background: none; border: none; color: #fff; font-size: 24px; cursor: pointer; padding: 4px 8px; border-radius: 6px; }
        .hamburger:hover { background: rgba(255,255,255,0.1); }

        /* ===== 遮罩 ===== */
        .sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 999; }

        /* ===== Hero ===== */
        .hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 40%, var(--primary-light) 100%);
            padding: 80px 40px 100px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -60px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(240,165,0,0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -80px;
            left: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero .container { position: relative; z-index: 1; }
        .hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            max-width: 720px;
        }
        .hero h1 i { color: var(--accent); margin-right: 6px; }
        .hero p {
            font-size: 18px;
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all var(--transition);
            border: 2px solid var(--accent);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary:hover { background: var(--accent-light); border-color: var(--accent-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(240,165,0,0.35); }
        .btn-outline {
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all var(--transition);
            border: 2px solid rgba(255,255,255,0.3);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.6); color: #fff; transform: translateY(-2px); }

        /* ===== 板块通用 ===== */
        .section { padding: 80px 0; }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text);
            text-align: center;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-light);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section.bg-light { background: var(--bg); }
        .section.bg-white { background: #fff; }
        .section.bg-dark { background: var(--primary-dark); color: #fff; }
        .section.bg-dark .section-title { color: #fff; }
        .section.bg-dark .section-subtitle { color: rgba(255,255,255,0.7); }

        /* ===== 核心优势卡片 ===== */
        .features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .feature-card {
            background: var(--bg-card);
            padding: 36px 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            text-align: center;
            border: 1px solid var(--border);
        }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--primary-light); }
        .feature-card .icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 26px;
            color: #fff;
        }
        .feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
        .feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

        /* ===== 分类入口 ===== */
        .category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            text-align: center;
            cursor: pointer;
            text-decoration: none;
            display: block;
            color: var(--text);
        }
        .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--accent); color: var(--text); }
        .category-card .cat-icon { font-size: 40px; color: var(--primary); margin-bottom: 16px; }
        .category-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
        .category-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }
        .category-card .tag {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            margin-top: 12px;
        }

        /* ===== 资讯列表 ===== */
        .news-list { display: flex; flex-direction: column; gap: 20px; }
        .news-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            align-items: flex-start;
            gap: 20px;
        }
        .news-item:hover { transform: translateX(4px); box-shadow: var(--shadow-hover); border-color: var(--primary-light); }
        .news-item .num {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
        }
        .news-item .content { flex: 1; }
        .news-item .content h4 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
        .news-item .content h4 a { color: var(--text); text-decoration: none; }
        .news-item .content h4 a:hover { color: var(--primary); }
        .news-item .content p { font-size: 14px; color: var(--text-light); line-height: 1.6; margin-bottom: 8px; }
        .news-item .meta { font-size: 13px; color: var(--text-light); display: flex; align-items: center; gap: 16px; }
        .news-item .meta .cat { background: var(--bg); padding: 2px 12px; border-radius: 50px; font-size: 12px; color: var(--primary); font-weight: 500; }
        .news-item .meta i { margin-right: 4px; }

        .empty-news {
            text-align: center;
            padding: 48px 20px;
            color: var(--text-light);
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
            font-size: 16px;
        }
        .empty-news i { font-size: 40px; color: var(--border); margin-bottom: 16px; display: block; }

        /* ===== 流程步骤 ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            z-index: 0;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            position: relative;
            z-index: 1;
            transition: all var(--transition);
        }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .step-card .step-num {
            width: 52px;
            height: 52px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(15,76,117,0.3);
        }
        .step-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
        .step-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius);
            border: 1px solid rgba(255,255,255,0.1);
            transition: all var(--transition);
        }
        .stat-item:hover { background: rgba(255,255,255,0.10); border-color: var(--accent); }
        .stat-item .num { font-size: 40px; font-weight: 800; color: var(--accent); line-height: 1.2; }
        .stat-item .label { font-size: 15px; color: rgba(255,255,255,0.7); margin-top: 8px; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(15,76,117,0.04); }
        .faq-question i { color: var(--primary); transition: transform var(--transition); font-size: 14px; }
        .faq-question.active i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-answer.open { display: block; }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            color: #fff;
            box-shadow: 0 16px 48px rgba(15,76,117,0.25);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(240,165,0,0.10) 0%, transparent 70%);
            border-radius: 50%;
        }
        .cta-box h2 { font-size: 34px; font-weight: 700; margin-bottom: 16px; position: relative; z-index: 1; }
        .cta-box p { font-size: 17px; color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 28px; position: relative; z-index: 1; }
        .cta-box .btn-primary { background: #fff; color: var(--primary-dark); border-color: #fff; }
        .cta-box .btn-primary:hover { background: var(--accent); color: #fff; border-color: var(--accent); box-shadow: 0 8px 24px rgba(240,165,0,0.3); }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 32px;
            margin-top: auto;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .footer-brand .logo { font-size: 20px; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { font-size: 14px; line-height: 1.8; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
        .footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 14px; padding: 4px 0; transition: all var(--transition); text-decoration: none; }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            margin-top: 40px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid::before { display: none; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .hero h1 { font-size: 36px; }
            .hero { padding: 60px 24px 80px; }
        }

        @media (max-width: 768px) {
            .sidebar { transform: translateX(-100%); }
            .sidebar.open { transform: translateX(0); }
            .sidebar-overlay.open { display: block; }
            .mobile-header { display: flex; }
            .main-content { margin-left: 0; }
            .hero h1 { font-size: 28px; }
            .hero p { font-size: 16px; }
            .hero { padding: 48px 20px 64px; }
            .section { padding: 56px 0; }
            .section-title { font-size: 26px; }
            .features-grid { grid-template-columns: 1fr; }
            .category-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr; }
            .news-item { flex-direction: column; padding: 20px; }
            .news-item .num { width: 32px; height: 32px; font-size: 14px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .cta-box { padding: 40px 24px; }
            .cta-box h2 { font-size: 26px; }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .hero-actions .btn-primary, .hero-actions .btn-outline { justify-content: center; text-align: center; }
        }

        @media (max-width: 520px) {
            .hero h1 { font-size: 24px; }
            .section-title { font-size: 22px; }
            .feature-card { padding: 24px 16px; }
            .category-card { padding: 24px 16px; }
            .step-card { padding: 24px 16px; }
            .stat-item .num { font-size: 32px; }
            .faq-question { font-size: 15px; padding: 14px 16px; }
            .faq-answer { padding: 0 16px 14px; font-size: 14px; }
            .cta-box { padding: 32px 16px; }
            .cta-box h2 { font-size: 22px; }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .gap-1 { gap: 8px; }
        .gap-2 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a5276;
            --primary-dark: #0e3a5c;
            --primary-light: #2980b9;
            --accent: #e67e22;
            --accent-dark: #d35400;
            --accent-light: #f39c12;
            --bg: #f8fafc;
            --bg-alt: #edf2f7;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --text-muted: #94a3b8;
            --border: #dde7f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
            --transition: 0.25s ease;
            --font: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
            --spacing-section: 4.5rem;
        }

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

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

        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--accent-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Layout Shell ===== */
        .app-layout {
            display: flex;
            min-height: 100vh;
        }

        /* ===== Sidebar ===== */
        .sidebar {
            width: var(--sidebar-width);
            background: var(--bg-card);
            border-right: 1px solid var(--border);
            padding: 1.8rem 1.2rem;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 100;
            display: flex;
            flex-direction: column;
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.03);
            transition: transform var(--transition);
        }

        .sidebar-logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid var(--border);
            margin-bottom: 1.8rem;
        }
        .sidebar-logo i {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .sidebar-logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
            flex: 1;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            padding: 0.75rem 1rem;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            position: relative;
        }
        .sidebar-nav a i {
            width: 1.4rem;
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .sidebar-nav a:hover {
            background: var(--bg-alt);
            color: var(--primary);
        }
        .sidebar-nav a:hover i {
            color: var(--primary-light);
        }
        .sidebar-nav a.active {
            background: rgba(26, 82, 118, 0.08);
            color: var(--primary);
            font-weight: 600;
        }
        .sidebar-nav a.active i {
            color: var(--primary);
        }
        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 60%;
            background: var(--accent);
            border-radius: 0 4px 4px 0;
        }

        .sidebar-footer {
            padding-top: 1.5rem;
            border-top: 1px solid var(--border);
            font-size: 0.8rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            padding: 0;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* ===== Mobile Top Bar ===== */
        .mobile-topbar {
            display: none;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 0.8rem 1.2rem;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 99;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
        }
        .mobile-topbar .logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .mobile-topbar .logo i {
            color: var(--accent);
        }
        .menu-toggle {
            background: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 0.3rem 0.6rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--bg-alt);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 3rem 0 2.5rem 0;
            color: #fff;
        }
        .article-hero .container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            margin-bottom: 1.2rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .article-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }
        .article-hero .breadcrumb a:hover {
            color: #fff;
        }
        .article-hero .breadcrumb i {
            font-size: 0.7rem;
        }
        .article-hero h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
        }
        .article-hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.75);
        }
        .article-hero .meta span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .article-hero .meta .category-tag {
            background: var(--accent);
            color: #fff;
            padding: 0.2rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* ===== Article Body ===== */
        .article-body-section {
            padding: 3rem 0 4rem 0;
            background: var(--bg);
        }
        .article-body-section .container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .article-body-wrapper {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 2.5rem 3rem;
        }
        .article-body-wrapper .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body-wrapper .article-content p {
            margin-bottom: 1.4rem;
        }
        .article-body-wrapper .article-content h2,
        .article-body-wrapper .article-content h3 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--primary);
            font-weight: 700;
        }
        .article-body-wrapper .article-content h2 {
            font-size: 1.6rem;
        }
        .article-body-wrapper .article-content h3 {
            font-size: 1.25rem;
        }
        .article-body-wrapper .article-content ul,
        .article-body-wrapper .article-content ol {
            margin-bottom: 1.4rem;
            padding-left: 1.5rem;
        }
        .article-body-wrapper .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4rem;
        }
        .article-body-wrapper .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4rem;
        }
        .article-body-wrapper .article-content img {
            margin: 1.5rem 0;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
        }
        .article-body-wrapper .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: 0.8rem 1.5rem;
            margin: 1.5rem 0;
            background: var(--bg-alt);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body-wrapper .article-content a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body-wrapper .article-content a:hover {
            color: var(--accent);
        }

        .article-not-found {
            text-align: center;
            padding: 4rem 2rem;
        }
        .article-not-found i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            color: var(--text);
            margin-bottom: 1rem;
        }
        .article-not-found p {
            color: var(--text-light);
            margin-bottom: 2rem;
        }
        .article-not-found .btn {
            display: inline-block;
            padding: 0.8rem 2rem;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all var(--transition);
        }
        .article-not-found .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== Article Footer Nav ===== */
        .article-footer-nav {
            padding: 2rem 0 0 0;
            border-top: 1px solid var(--border);
            margin-top: 2.5rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .article-footer-nav a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: var(--text-light);
            font-weight: 500;
            transition: all var(--transition);
        }
        .article-footer-nav a:hover {
            color: var(--primary);
        }
        .article-footer-nav .next {
            text-align: right;
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 3rem 0 4rem 0;
            background: var(--bg-alt);
        }
        .related-section .container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .related-section h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 2rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .related-section h2 i {
            color: var(--accent);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .cat {
            font-size: 0.75rem;
            color: var(--accent);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.5rem;
        }
        .related-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
            line-height: 1.4;
        }
        .related-card h3 a {
            color: var(--text);
        }
        .related-card h3 a:hover {
            color: var(--primary);
        }
        .related-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0.8rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .date {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 4rem 0 2rem 0;
            margin-top: auto;
        }
        .footer .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            margin-bottom: 1rem;
        }
        .footer-brand .logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
            position: relative;
            padding-bottom: 0.5rem;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            padding: 0.35rem 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 1.8rem;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Sidebar Overlay (mobile) ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
            z-index: 89;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .sidebar-overlay.active {
            opacity: 1;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-body-wrapper {
                padding: 2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --spacing-section: 3rem;
            }

            .sidebar {
                transform: translateX(-100%);
                width: 280px;
            }
            .sidebar.open {
                transform: translateX(0);
            }

            .main-content {
                margin-left: 0;
            }

            .mobile-topbar {
                display: flex;
            }

            .article-hero {
                padding: 2rem 0 1.5rem 0;
            }
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-hero .meta {
                font-size: 0.85rem;
                gap: 0.8rem;
            }
            .article-body-wrapper {
                padding: 1.5rem;
                border-radius: var(--radius-sm);
            }
            .article-body-wrapper .article-content {
                font-size: 1rem;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-footer-nav {
                flex-direction: column;
                align-items: flex-start;
            }
            .article-footer-nav .next {
                text-align: left;
            }
        }

        @media (max-width: 520px) {
            .article-hero .container,
            .article-body-section .container,
            .related-section .container {
                padding: 0 1rem;
            }
            .article-hero h1 {
                font-size: 1.3rem;
            }
            .article-body-wrapper {
                padding: 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-col h4::after {
                left: 0;
                transform: none;
            }
            .mobile-topbar .logo span {
                font-size: 0.95rem;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .gap-1 {
            gap: 1rem;
        }

        /* Foundation overrides for consistency */
        .grid-container {
            max-width: 1200px;
            padding: 0 2rem;
        }
        .cell {
            padding: 0;
        }
        .grid-x {
            margin: 0;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #1a6dff;
            --color-primary-dark: #0d4fbf;
            --color-primary-light: #e8f0ff;
            --color-secondary: #ff6b35;
            --color-secondary-dark: #e55a2b;
            --color-accent: #00c9a7;
            --color-bg: #f8faff;
            --color-bg-alt: #ffffff;
            --color-bg-sidebar: #0b1a33;
            --color-bg-sidebar-hover: #122a4a;
            --color-bg-card: #ffffff;
            --color-text: #1a2639;
            --color-text-light: #5a6a7e;
            --color-text-sidebar: #c8d6e5;
            --color-text-sidebar-active: #ffffff;
            --color-border: #e2e8f0;
            --color-border-light: #f0f4fa;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --sidebar-collapsed: 0px;
            --header-height: 0px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --spacing-section: 5rem;
            --spacing-block: 2.5rem;
        }

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

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

        body {
            font-family: var(--font-sans);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            font-size: 16px;
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== 容器 ===== */
        .main-wrapper {
            flex: 1;
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            width: 100%;
        }

        .container-narrow {
            max-width: 880px;
            margin: 0 auto;
            padding: 0 2rem;
            width: 100%;
        }

        .section {
            padding: var(--spacing-section) 0;
        }

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

        .section-dark {
            background: var(--color-bg-sidebar);
            color: var(--color-text-sidebar);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: #ffffff;
        }

        /* ===== 侧边栏导航 (App Shell 左侧) ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-bg-sidebar);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 1.8rem 0 1.5rem;
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.1);
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            overflow-y: auto;
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0 1.5rem 2rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            margin-bottom: 1.2rem;
        }

        .sidebar-logo .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            flex-shrink: 0;
        }

        .sidebar-logo .logo-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            line-height: 1.3;
        }
        .sidebar-logo .logo-text span {
            color: var(--color-accent);
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
            padding: 0 1rem;
            flex: 1;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 0.85rem;
            padding: 0.85rem 1.2rem;
            border-radius: var(--radius-sm);
            color: var(--color-text-sidebar);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }

        .sidebar-nav a i {
            width: 22px;
            text-align: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .sidebar-nav a:hover {
            background: var(--color-bg-sidebar-hover);
            color: var(--color-text-sidebar-active);
        }

        .sidebar-nav a.active {
            background: var(--color-primary);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(26, 109, 255, 0.35);
        }

        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: -1rem;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--color-accent);
            border-radius: 0 4px 4px 0;
        }

        .sidebar-footer-links {
            padding: 1.5rem 1.5rem 0.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: auto;
        }

        .sidebar-footer-links a {
            display: block;
            padding: 0.5rem 0;
            color: var(--color-text-sidebar);
            font-size: 0.85rem;
            opacity: 0.7;
            transition: var(--transition);
        }
        .sidebar-footer-links a:hover {
            opacity: 1;
            color: #ffffff;
        }

        /* 移动端菜单切换按钮 */
        .sidebar-toggle {
            display: none;
            position: fixed;
            top: 1rem;
            left: 1rem;
            z-index: 1100;
            background: var(--color-bg-sidebar);
            color: #fff;
            border: none;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
        }
        .sidebar-toggle:hover {
            background: var(--color-primary);
        }

        /* 遮罩层 */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .sidebar-overlay.active {
            opacity: 1;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        /* ===== 页面标题区 ===== */
        .page-hero {
            background: linear-gradient(135deg, var(--color-bg-sidebar) 0%, #0f2744 100%);
            padding: 3.5rem 0 4rem;
            position: relative;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(26, 109, 255, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .page-hero h1 i {
            color: var(--color-accent);
            margin-right: 0.5rem;
        }

        .page-hero .hero-sub {
            font-size: 1.15rem;
            color: var(--color-text-sidebar);
            max-width: 680px;
            line-height: 1.8;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
            color: var(--color-text-sidebar);
            opacity: 0.7;
        }
        .breadcrumb a {
            color: var(--color-text-sidebar);
            opacity: 0.8;
        }
        .breadcrumb a:hover {
            opacity: 1;
            color: #ffffff;
        }
        .breadcrumb span {
            color: var(--color-accent);
            opacity: 1;
        }

        /* ===== 分类导航标签 ===== */
        .category-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin: 2.5rem 0 0;
        }

        .category-tabs a {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.08);
            color: var(--color-text-sidebar);
            font-size: 0.9rem;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.12);
            transition: var(--transition);
        }

        .category-tabs a:hover,
        .category-tabs a.active {
            background: var(--color-primary);
            color: #ffffff;
            border-color: var(--color-primary);
            box-shadow: 0 4px 20px rgba(26, 109, 255, 0.3);
        }

        /* ===== 内容卡片 ===== */
        .card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 1.8rem 2rem;
            transition: var(--transition);
            border: 1px solid var(--color-border-light);
        }

        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-primary);
            margin-bottom: 1.2rem;
        }

        .card h3 {
            font-size: 1.2rem;
            margin-bottom: 0.6rem;
        }

        .card p {
            color: var(--color-text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== 步骤流程 ===== */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.8rem;
            counter-reset: step;
        }

        .step-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 2rem 1.8rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            position: relative;
            transition: var(--transition);
            counter-increment: step;
        }

        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .step-item::before {
            content: counter(step);
            position: absolute;
            top: -12px;
            left: 1.5rem;
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: #ffffff;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(26, 109, 255, 0.3);
        }

        .step-item .step-icon {
            font-size: 2rem;
            color: var(--color-primary);
            margin-bottom: 1rem;
            margin-top: 0.3rem;
        }

        .step-item h4 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
        }

        .step-item p {
            color: var(--color-text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            max-width: 880px;
            margin: 0 auto;
        }

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

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

        .faq-question {
            width: 100%;
            padding: 1.3rem 1.8rem;
            background: none;
            border: none;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            transition: var(--transition);
        }

        .faq-question i {
            color: var(--color-primary);
            transition: transform 0.3s;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 1.8rem 1.3rem;
            color: var(--color-text-light);
            font-size: 0.95rem;
            line-height: 1.8;
            display: none;
        }

        .faq-answer.open {
            display: block;
        }

        /* ===== 安全提示区块 ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.5rem;
        }

        .tip-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 1.8rem;
            border-left: 4px solid var(--color-primary);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .tip-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .tip-card.warning {
            border-left-color: var(--color-warning);
        }
        .tip-card.success {
            border-left-color: var(--color-success);
        }
        .tip-card.secondary {
            border-left-color: var(--color-secondary);
        }

        .tip-card .tip-icon {
            font-size: 1.5rem;
            margin-bottom: 0.8rem;
            color: var(--color-primary);
        }
        .tip-card.warning .tip-icon {
            color: var(--color-warning);
        }
        .tip-card.success .tip-icon {
            color: var(--color-success);
        }
        .tip-card.secondary .tip-icon {
            color: var(--color-secondary);
        }

        .tip-card h4 {
            font-size: 1.05rem;
            margin-bottom: 0.4rem;
        }

        .tip-card p {
            color: var(--color-text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            border-radius: var(--radius-lg);
            padding: 3.5rem 4rem;
            text-align: center;
            color: #ffffff;
            box-shadow: 0 20px 60px rgba(26, 109, 255, 0.25);
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-box h2 {
            font-size: 2rem;
            color: #ffffff;
            margin-bottom: 0.8rem;
        }

        .cta-box p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        .cta-box .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: #ffffff;
            color: var(--color-primary);
            padding: 1rem 2.8rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
        }

        .cta-box .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
            background: #f0f4ff;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }

        .btn-primary {
            background: var(--color-primary);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(26, 109, 255, 0.25);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(26, 109, 255, 0.35);
            color: #ffffff;
        }

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

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

        /* ===== 表格数据 ===== */
        .table-wrap {
            overflow-x: auto;
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }

        .table-wrap table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }

        .table-wrap th {
            background: var(--color-primary-light);
            color: var(--color-text);
            font-weight: 600;
            padding: 1rem 1.5rem;
            text-align: left;
            font-size: 0.9rem;
        }

        .table-wrap td {
            padding: 1rem 1.5rem;
            border-bottom: 1px solid var(--color-border-light);
            font-size: 0.92rem;
            color: var(--color-text-light);
        }

        .table-wrap tr:last-child td {
            border-bottom: none;
        }

        .table-wrap tr:hover td {
            background: rgba(26, 109, 255, 0.02);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        .badge-success {
            background: #d1fae5;
            color: #065f46;
        }

        .badge-warning {
            background: #fef3c7;
            color: #92400e;
        }

        .badge-info {
            background: var(--color-primary-light);
            color: var(--color-primary-dark);
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            border-radius: 4px;
            margin: 1rem 0 2rem;
        }

        .divider-center {
            margin: 1rem auto 2rem;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--color-bg-sidebar);
            color: var(--color-text-sidebar);
            padding: 4rem 0 0;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 3rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 1rem;
        }

        .footer-brand .logo i {
            color: var(--color-accent);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            opacity: 0.7;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
        }

        .footer-col a {
            display: block;
            color: var(--color-text-sidebar);
            font-size: 0.9rem;
            padding: 0.35rem 0;
            opacity: 0.7;
            transition: var(--transition);
        }

        .footer-col a:hover {
            opacity: 1;
            color: #ffffff;
            padding-left: 4px;
        }

        .footer-bottom {
            padding: 1.8rem 0;
            text-align: center;
            font-size: 0.85rem;
            opacity: 0.6;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --spacing-section: 3rem;
            }

            .sidebar {
                transform: translateX(-100%);
                width: 280px;
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .sidebar-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .sidebar-overlay {
                display: block;
                pointer-events: none;
            }
            .sidebar-overlay.active {
                pointer-events: auto;
            }

            .main-wrapper {
                margin-left: 0;
            }

            .container {
                padding: 0 1.2rem;
            }

            .page-hero {
                padding: 2.5rem 0 3rem;
            }

            .page-hero h1 {
                font-size: 1.8rem;
            }

            .page-hero .hero-sub {
                font-size: 1rem;
            }

            .steps-list {
                grid-template-columns: 1fr;
            }

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

            .cta-box {
                padding: 2.5rem 1.5rem;
            }

            .cta-box h2 {
                font-size: 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .category-tabs {
                gap: 0.5rem;
            }
            .category-tabs a {
                padding: 0.4rem 1rem;
                font-size: 0.85rem;
            }

            .card {
                padding: 1.5rem;
            }

            .step-item {
                padding: 1.5rem 1.2rem;
            }

            .faq-question {
                padding: 1rem 1.2rem;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 1.2rem 1rem;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.5rem;
            }

            .breadcrumb {
                font-size: 0.8rem;
                flex-wrap: wrap;
            }

            .category-tabs a {
                font-size: 0.8rem;
                padding: 0.3rem 0.9rem;
            }

            .table-wrap th,
            .table-wrap td {
                padding: 0.7rem 1rem;
                font-size: 0.82rem;
            }

            .cta-box .btn-cta {
                padding: 0.8rem 2rem;
                font-size: 1rem;
            }

            .footer {
                padding: 2.5rem 0 0;
            }
        }

        /* ===== 辅助类 ===== */
        .text-center {
            text-align: center;
        }
        .text-accent {
            color: var(--color-accent);
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-4 {
            margin-top: 2rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-4 {
            margin-bottom: 2rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* 暗色区块内的调整 */
        .section-dark .card {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.08);
        }
        .section-dark .card h3 {
            color: #ffffff;
        }
        .section-dark .card p {
            color: var(--color-text-sidebar);
        }
        .section-dark .card .card-icon {
            background: rgba(26, 109, 255, 0.2);
        }