/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0a6e5e;
            --primary-light: #14b8a6;
            --primary-dark: #065244;
            --secondary: #0891b2;
            --accent: #0ea5e9;
            --bg: #f8fafc;
            --bg-alt: #f1f5f9;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
            --shadow-hover: 0 8px 32px rgba(10,110,94,0.12);
            --transition: 0.25s ease;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== 板块间距 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-card { background: var(--bg-card); }
        .section-title {
            font-size: 2rem;
            margin-bottom: 12px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }
        @media (max-width: 768px) {
            .section { padding: 48px 0; }
            .section-title { font-size: 1.5rem; }
            .section-subtitle { font-size: 0.95rem; margin-bottom: 32px; }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-outline {
            background: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
        }
        .btn-light:hover {
            background: var(--bg-alt);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn:focus-visible { outline: 3px solid var(--secondary); outline-offset: 2px; }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(10,110,94,0.08);
            color: var(--primary);
        }
        .badge-secondary {
            background: rgba(8,145,178,0.08);
            color: var(--secondary);
        }
        .badge-warning {
            background: rgba(245,158,11,0.12);
            color: #b45309;
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card-body { padding: 24px; }
        .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }

        /* ===== 网格 ===== */
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
        .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 20px; }
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--primary-light);
            border-radius: 4px;
            margin: 0 auto 16px;
        }
        .divider-left { margin: 0 0 16px; }

        /* ===== 导航 ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i { font-size: 1.3rem; color: var(--primary-light); }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover { color: var(--primary); background: rgba(10,110,94,0.05); }
        .nav-list a.active {
            color: var(--primary);
            background: rgba(10,110,94,0.08);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-cta .btn { padding: 10px 22px; font-size: 0.9rem; }
        .nav-right { display: flex; align-items: center; gap: 16px; }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 24px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .search-box:focus-within { border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(10,110,94,0.08); }
        .search-box input {
            padding: 8px 8px 8px 4px;
            background: transparent;
            border: none;
            width: 140px;
            font-size: 0.9rem;
            color: var(--text);
        }
        .search-box input::placeholder { color: var(--text-light); }
        .search-box i { color: var(--text-light); font-size: 0.9rem; }

        /* 移动端菜单 */
        .menu-toggle { display: none; font-size: 1.5rem; color: var(--text); padding: 4px; }
        @media (max-width: 768px) {
            .menu-toggle { display: block; }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s ease;
                pointer-events: none;
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav-list a.active::after { display: none; }
            .nav-list a.active { background: rgba(10,110,94,0.08); }
            .nav-right .search-box { display: none; }
            .nav-cta .btn { padding: 8px 16px; font-size: 0.85rem; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(6,82,68,0.92) 0%, rgba(10,110,94,0.85) 50%, rgba(8,145,178,0.60) 100%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .hero .container { position: relative; z-index: 1; }
        .hero-content { max-width: 700px; padding: 40px 0; }
        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 20px;
            background: rgba(255,255,255,0.15);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .hero h1 span { color: var(--primary-light); }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.85);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 540px;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-actions .btn-light { color: var(--primary); }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.15);
        }
        .hero-stats .stat-num { font-size: 2rem; font-weight: 800; color: #fff; }
        .hero-stats .stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.7); }
        @media (max-width: 768px) {
            .hero { min-height: 480px; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stats .stat-num { font-size: 1.5rem; }
        }

        /* ===== 平台简介 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-text h2 { font-size: 1.8rem; margin-bottom: 16px; }
        .intro-text p { color: var(--text-secondary); margin-bottom: 16px; font-size: 1rem; line-height: 1.8; }
        .intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
        .intro-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
        }
        .intro-features li i { color: var(--primary-light); font-size: 1.1rem; }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .intro-image img { width: 100%; height: 400px; object-fit: cover; }
        @media (max-width: 768px) {
            .intro-grid { grid-template-columns: 1fr; gap: 32px; }
            .intro-text h2 { font-size: 1.4rem; }
            .intro-features { grid-template-columns: 1fr; }
            .intro-image img { height: 240px; }
        }

        /* ===== 玩法指南分类入口 ===== */
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .category-card .card-img {
            height: 200px;
            object-fit: cover;
        }
        .category-card .card-body { padding: 20px 24px 24px; }
        .category-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .category-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; }
        .category-card .btn { font-size: 0.85rem; padding: 8px 20px; }

        /* ===== 数据亮点 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .stat-card .stat-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: rgba(10,110,94,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
        }
        .stat-card .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
        }
        .stat-card .stat-number small { font-size: 1rem; font-weight: 600; color: var(--text-secondary); }
        .stat-card .stat-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 8px;
        }
        @media (max-width: 1024px) {
            .stats-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .stats-grid { grid-template-columns: 1fr; }
            .stat-card { padding: 24px 16px; }
            .stat-card .stat-number { font-size: 1.8rem; }
        }

        /* ===== 最新资讯 (CMS) ===== */
        .post-list { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .post-card .card-body { padding: 20px 24px 24px; flex: 1; display: flex; flex-direction: column; }
        .post-card .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .post-card .post-meta .badge { font-size: 0.7rem; padding: 2px 10px; }
        .post-card h3 { font-size: 1.05rem; margin-bottom: 8px; line-height: 1.4; }
        .post-card h3 a { color: var(--text); }
        .post-card h3 a:hover { color: var(--primary); }
        .post-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; flex: 1; }
        .post-card .post-footer {
            margin-top: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .post-card .post-footer a { color: var(--primary); font-weight: 500; }
        .empty-msg {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-secondary);
            font-size: 1rem;
            background: var(--bg-alt);
            border-radius: var(--radius-md);
        }
        @media (max-width: 768px) {
            .post-list { grid-template-columns: 1fr; }
        }

        /* ===== 使用流程 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            text-align: center;
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(10,110,94,0.25);
        }
        .step-card .step-icon {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: 16px;
            margin-top: 8px;
        }
        .step-card h4 { font-size: 1.05rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-secondary); }
        @media (max-width: 1024px) {
            .steps { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .steps { 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-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;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: all var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { color: var(--primary-light); transition: transform var(--transition); }
        .faq-answer {
            padding: 0 24px 0;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            padding: 0 24px 20px;
            max-height: 300px;
        }
        .faq-item.open .faq-question i { transform: rotate(180deg); }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 80px 0;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 32px;
            max-width: 540px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-light { font-size: 1.05rem; padding: 14px 36px; }
        .cta-section .btn-outline {
            border-color: rgba(255,255,255,0.5);
            color: #fff;
            margin-left: 12px;
        }
        .cta-section .btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
        @media (max-width: 768px) {
            .cta-section { padding: 48px 0; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section .btn { width: 100%; justify-content: center; margin: 8px 0; }
            .cta-section .btn-outline { margin-left: 0; }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #0c1222;
            color: rgba(255,255,255,0.7);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 300px; }
        .footer h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
        .footer ul li { margin-bottom: 10px; }
        .footer ul a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: color var(--transition); }
        .footer ul a:hover { color: var(--primary-light); }
        .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: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--primary-light); }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
        }

        /* ===== 实用工具 ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== 响应式微调 ===== */
        @media (max-width: 768px) {
            .hero-actions .btn { flex: 1; justify-content: center; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
    :root {
        --primary: #1a3a5c;
        --primary-light: #2a5a8c;
        --primary-dark: #0f2440;
        --accent: #e8a83e;
        --accent-light: #f0c060;
        --accent-dark: #c88a2a;
        --bg-body: #f5f7fa;
        --bg-card: #ffffff;
        --bg-section-alt: #eef2f7;
        --bg-dark: #0f1a2b;
        --text-primary: #1a2a3a;
        --text-secondary: #4a5a6a;
        --text-light: #7a8a9a;
        --text-white: #ffffff;
        --border-color: #e0e6ed;
        --border-light: #f0f2f5;
        --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 8px 40px rgba(0, 0, 0, 0.12);
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 20px;
        --radius-full: 50px;
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        --container-max: 1200px;
        --header-height: 72px;
        --spacing-section: 80px;
        --spacing-block: 48px;
    }

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

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

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

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

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

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

    button {
        cursor: pointer;
    }

    ul,
    ol {
        list-style: none;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        font-weight: 700;
        line-height: 1.3;
        color: var(--text-primary);
    }
    h1 {
        font-size: 2.6rem;
    }
    h2 {
        font-size: 2rem;
    }
    h3 {
        font-size: 1.4rem;
    }
    h4 {
        font-size: 1.1rem;
    }

    p {
        margin-bottom: 1rem;
        color: var(--text-secondary);
    }
    p:last-child {
        margin-bottom: 0;
    }

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

    /* ===== Header & Navigation ===== */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        height: var(--header-height);
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
        transition: var(--transition);
    }

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

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: -0.5px;
        flex-shrink: 0;
    }
    .logo i {
        color: var(--accent);
        font-size: 1.6rem;
    }
    .logo span {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .logo a {
        display: flex;
        align-items: center;
        gap: 10px;
        color: inherit;
    }
    .logo a:hover {
        opacity: 0.9;
    }

    .nav-wrapper {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .nav-list {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .nav-list li a {
        display: flex;
        align-items: center;
        padding: 8px 18px;
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--text-secondary);
        border-radius: var(--radius-full);
        transition: var(--transition);
        position: relative;
        white-space: nowrap;
    }
    .nav-list li a:hover {
        color: var(--primary);
        background: rgba(26, 58, 92, 0.06);
    }
    .nav-list li a.active {
        color: var(--text-white);
        background: var(--primary);
        box-shadow: 0 4px 12px rgba(26, 58, 92, 0.25);
    }
    .nav-list li a.active::after {
        display: none;
    }

    .nav-actions {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-left: 8px;
    }

    .search-box {
        display: flex;
        align-items: center;
        background: var(--bg-body);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-full);
        padding: 0 16px;
        height: 40px;
        transition: var(--transition);
        min-width: 180px;
    }
    .search-box:focus-within {
        border-color: var(--accent);
        box-shadow: 0 0 0 3px rgba(232, 168, 62, 0.15);
        background: var(--bg-card);
    }
    .search-box i {
        color: var(--text-light);
        font-size: 0.9rem;
        margin-right: 8px;
    }
    .search-box input {
        flex: 1;
        background: transparent;
        border: none;
        font-size: 0.9rem;
        color: var(--text-primary);
        height: 100%;
        padding: 0;
    }
    .search-box input::placeholder {
        color: var(--text-light);
    }

    .btn-cta {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 24px;
        background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
        color: var(--primary-dark);
        font-weight: 700;
        font-size: 0.95rem;
        border-radius: var(--radius-full);
        box-shadow: 0 4px 14px rgba(232, 168, 62, 0.35);
        transition: var(--transition);
        border: none;
        white-space: nowrap;
    }
    .btn-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(232, 168, 62, 0.45);
        color: var(--primary-dark);
    }
    .btn-cta:active {
        transform: translateY(0);
        box-shadow: 0 2px 8px rgba(232, 168, 62, 0.3);
    }
    .btn-cta i {
        font-size: 0.85rem;
    }

    /* Mobile toggle */
    .mobile-toggle {
        display: none;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 40px;
        height: 40px;
        background: var(--bg-body);
        border-radius: var(--radius-sm);
        cursor: pointer;
        transition: var(--transition);
        border: 1px solid var(--border-color);
    }
    .mobile-toggle span {
        display: block;
        width: 20px;
        height: 2px;
        background: var(--text-primary);
        border-radius: 2px;
        transition: var(--transition);
        margin: 3px 0;
    }
    .mobile-toggle:hover {
        background: var(--border-color);
    }
    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(4px, 4px);
    }
    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(4px, -4px);
    }

    /* ===== Page Banner ===== */
    .page-banner {
        margin-top: var(--header-height);
        padding: 80px 0 60px;
        background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
        position: relative;
        overflow: hidden;
        min-height: 320px;
        display: flex;
        align-items: center;
    }
    .page-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        opacity: 0.15;
        mix-blend-mode: overlay;
    }
    .page-banner::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        right: 0;
        height: 60px;
        background: var(--bg-body);
        clip-path: ellipse(70% 100% at 50% 100%);
    }
    .page-banner .container {
        position: relative;
        z-index: 2;
        text-align: center;
    }
    .page-banner h1 {
        color: var(--text-white);
        font-size: 2.8rem;
        font-weight: 800;
        margin-bottom: 16px;
        letter-spacing: -0.5px;
    }
    .page-banner h1 i {
        color: var(--accent);
        margin-right: 12px;
    }
    .page-banner p {
        color: rgba(255, 255, 255, 0.85);
        font-size: 1.15rem;
        max-width: 640px;
        margin: 0 auto 24px;
        line-height: 1.8;
    }
    .page-banner .banner-tags {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    .page-banner .banner-tags span {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 18px;
        background: rgba(255, 255, 255, 0.12);
        backdrop-filter: blur(6px);
        border: 1px solid rgba(255, 255, 255, 0.18);
        border-radius: var(--radius-full);
        color: var(--text-white);
        font-size: 0.88rem;
        font-weight: 500;
    }
    .page-banner .banner-tags span i {
        color: var(--accent);
        font-size: 0.8rem;
    }

    /* ===== Breadcrumb ===== */
    .breadcrumb {
        padding: 16px 0;
        background: var(--bg-body);
        border-bottom: 1px solid var(--border-color);
    }
    .breadcrumb ul {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
        font-size: 0.88rem;
        color: var(--text-light);
    }
    .breadcrumb ul li {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .breadcrumb ul li:not(:last-child)::after {
        content: '/';
        color: var(--border-color);
        font-size: 0.8rem;
    }
    .breadcrumb ul li a {
        color: var(--text-secondary);
    }
    .breadcrumb ul li a:hover {
        color: var(--primary);
    }
    .breadcrumb ul li span {
        color: var(--text-primary);
        font-weight: 600;
    }

    /* ===== Section Common ===== */
    .section {
        padding: var(--spacing-section) 0;
    }
    .section-alt {
        background: var(--bg-section-alt);
    }
    .section-header {
        text-align: center;
        margin-bottom: var(--spacing-block);
    }
    .section-header h2 {
        margin-bottom: 12px;
        position: relative;
        display: inline-block;
    }
    .section-header h2::after {
        content: '';
        display: block;
        width: 50px;
        height: 4px;
        background: var(--accent);
        border-radius: 4px;
        margin: 12px auto 0;
    }
    .section-header p {
        max-width: 580px;
        margin: 0 auto;
        color: var(--text-light);
        font-size: 1.05rem;
    }

    /* ===== Grid / Cards ===== */
    .grid-3 {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .grid-2 {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }

    .card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        padding: 28px 24px;
        transition: var(--transition);
        overflow: hidden;
    }
    .card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-4px);
    }
    .card .card-icon {
        width: 52px;
        height: 52px;
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        color: var(--text-white);
        background: var(--primary);
        margin-bottom: 16px;
    }
    .card .card-icon.accent {
        background: var(--accent);
        color: var(--primary-dark);
    }
    .card h3 {
        font-size: 1.2rem;
        margin-bottom: 10px;
    }
    .card p {
        font-size: 0.95rem;
        color: var(--text-secondary);
        margin-bottom: 12px;
    }
    .card .card-tag {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        padding: 4px 12px;
        background: var(--bg-section-alt);
        border-radius: var(--radius-full);
        font-size: 0.8rem;
        font-weight: 500;
        color: var(--text-secondary);
        border: 1px solid var(--border-color);
    }
    .card .card-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        margin-top: 12px;
        font-weight: 600;
        font-size: 0.92rem;
        color: var(--primary-light);
    }
    .card .card-link:hover {
        color: var(--primary);
        gap: 10px;
    }

    /* Card with image */
    .card-cover {
        padding: 0;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        overflow: hidden;
        transition: var(--transition);
    }
    .card-cover:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-4px);
    }
    .card-cover .cover-img {
        width: 100%;
        height: 200px;
        object-fit: cover;
        border-radius: 0;
        display: block;
    }
    .card-cover .cover-body {
        padding: 22px 20px 24px;
    }
    .card-cover .cover-body h3 {
        font-size: 1.15rem;
        margin-bottom: 8px;
    }
    .card-cover .cover-body p {
        font-size: 0.92rem;
        color: var(--text-secondary);
        margin-bottom: 10px;
    }
    .card-cover .cover-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 0.82rem;
        color: var(--text-light);
        padding-top: 12px;
        border-top: 1px solid var(--border-color);
    }
    .card-cover .cover-meta i {
        margin-right: 4px;
    }

    /* ===== Steps / Timeline ===== */
    .steps-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        counter-reset: step;
    }
    .step-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 32px 20px;
        text-align: center;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        transition: var(--transition);
        position: relative;
    }
    .step-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-3px);
    }
    .step-card::before {
        counter-increment: step;
        content: counter(step);
        position: absolute;
        top: -14px;
        left: 50%;
        transform: translateX(-50%);
        width: 32px;
        height: 32px;
        background: var(--primary);
        color: var(--text-white);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.9rem;
        font-weight: 700;
        box-shadow: 0 4px 12px rgba(26, 58, 92, 0.3);
    }
    .step-card .step-icon {
        font-size: 2rem;
        color: var(--accent);
        margin-bottom: 12px;
        margin-top: 4px;
    }
    .step-card h4 {
        font-size: 1.05rem;
        margin-bottom: 8px;
    }
    .step-card p {
        font-size: 0.88rem;
        color: var(--text-secondary);
        margin-bottom: 0;
    }

    /* ===== 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-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover {
        box-shadow: var(--shadow-md);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 18px 24px;
        font-weight: 600;
        font-size: 1rem;
        color: var(--text-primary);
        cursor: pointer;
        transition: var(--transition);
        background: none;
        border: none;
        width: 100%;
        text-align: left;
    }
    .faq-question i {
        color: var(--accent);
        font-size: 0.9rem;
        transition: var(--transition);
    }
    .faq-question.open i {
        transform: rotate(180deg);
    }
    .faq-answer {
        padding: 0 24px 20px;
        font-size: 0.95rem;
        color: var(--text-secondary);
        line-height: 1.8;
        display: none;
    }
    .faq-answer.show {
        display: block;
    }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
        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/cover no-repeat;
        opacity: 0.08;
        mix-blend-mode: overlay;
    }
    .cta-section .container {
        position: relative;
        z-index: 2;
    }
    .cta-section h2 {
        color: var(--text-white);
        font-size: 2.2rem;
        margin-bottom: 16px;
    }
    .cta-section p {
        color: rgba(255, 255, 255, 0.8);
        font-size: 1.1rem;
        max-width: 560px;
        margin: 0 auto 28px;
    }
    .cta-section .btn-cta {
        font-size: 1.05rem;
        padding: 14px 36px;
        background: var(--accent);
        color: var(--primary-dark);
        box-shadow: 0 6px 24px rgba(232, 168, 62, 0.4);
    }
    .cta-section .btn-cta:hover {
        box-shadow: 0 10px 36px rgba(232, 168, 62, 0.55);
        transform: translateY(-3px);
    }

    /* ===== Footer ===== */
    .footer {
        background: var(--bg-dark);
        color: rgba(255, 255, 255, 0.7);
        padding: 56px 0 0;
    }
    .footer .container {
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0 24px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.8fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand .logo {
        color: var(--text-white);
        margin-bottom: 16px;
    }
    .footer-brand .logo span {
        -webkit-text-fill-color: var(--text-white);
        background: none;
    }
    .footer-brand .logo i {
        color: var(--accent);
    }
    .footer-brand p {
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.6);
        line-height: 1.8;
        max-width: 300px;
    }
    .footer h4 {
        color: var(--text-white);
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 16px;
        letter-spacing: 0.5px;
    }
    .footer ul li {
        margin-bottom: 10px;
    }
    .footer ul li a {
        color: rgba(255, 255, 255, 0.6);
        font-size: 0.9rem;
        transition: var(--transition);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .footer ul li a:hover {
        color: var(--accent);
        padding-left: 4px;
    }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 0;
        font-size: 0.85rem;
        color: rgba(255, 255, 255, 0.4);
        flex-wrap: wrap;
        gap: 12px;
    }
    .footer-bottom span:last-child {
        font-size: 0.8rem;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        :root {
            --spacing-section: 60px;
            --spacing-block: 36px;
        }
        .grid-3 {
            grid-template-columns: repeat(2, 1fr);
        }
        .steps-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
        .page-banner h1 {
            font-size: 2.2rem;
        }
        h2 {
            font-size: 1.7rem;
        }
    }

    @media (max-width: 768px) {
        :root {
            --spacing-section: 48px;
            --spacing-block: 28px;
            --header-height: 64px;
        }
        .nav-list {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            flex-direction: column;
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            gap: 4px;
        }
        .nav-list.open {
            display: flex;
        }
        .nav-list li a {
            padding: 12px 16px;
            font-size: 1rem;
            border-radius: var(--radius-sm);
        }
        .mobile-toggle {
            display: flex;
        }
        .search-box {
            min-width: 120px;
            width: 140px;
        }
        .search-box input {
            font-size: 0.82rem;
        }
        .btn-cta {
            padding: 8px 16px;
            font-size: 0.85rem;
        }
        .btn-cta span {
            display: none;
        }
        .page-banner {
            padding: 60px 0 48px;
            min-height: 240px;
        }
        .page-banner h1 {
            font-size: 1.8rem;
        }
        .page-banner p {
            font-size: 1rem;
        }
        .grid-3,
        .grid-2 {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .steps-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .step-card::before {
            top: -12px;
            width: 28px;
            height: 28px;
            font-size: 0.8rem;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
        .section-header h2 {
            font-size: 1.5rem;
        }
        .cta-section h2 {
            font-size: 1.6rem;
        }
        .faq-question {
            padding: 14px 18px;
            font-size: 0.92rem;
        }
        .faq-answer {
            padding: 0 18px 16px;
            font-size: 0.88rem;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }
        .page-banner h1 {
            font-size: 1.5rem;
        }
        .page-banner p {
            font-size: 0.92rem;
        }
        .page-banner .banner-tags span {
            font-size: 0.78rem;
            padding: 4px 12px;
        }
        .search-box {
            min-width: 80px;
            width: 100px;
        }
        .search-box input {
            font-size: 0.78rem;
        }
        .btn-cta {
            padding: 6px 12px;
            font-size: 0.8rem;
        }
        h2 {
            font-size: 1.3rem;
        }
        .card {
            padding: 20px 16px;
        }
        .card-cover .cover-body {
            padding: 16px 14px 18px;
        }
        .card-cover .cover-img {
            height: 160px;
        }
        .step-card {
            padding: 24px 16px;
        }
        .cta-section {
            padding: 40px 0;
        }
        .cta-section h2 {
            font-size: 1.3rem;
        }
        .cta-section .btn-cta {
            padding: 10px 24px;
            font-size: 0.92rem;
        }
    }

    /* ===== Utility ===== */
    .text-center {
        text-align: center;
    }
    .mt-1 {
        margin-top: 12px;
    }
    .mt-2 {
        margin-top: 24px;
    }
    .mb-1 {
        margin-bottom: 12px;
    }
    .mb-2 {
        margin-bottom: 24px;
    }
    .gap-1 {
        gap: 12px;
    }
    .flex-center {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .flex-wrap {
        flex-wrap: wrap;
    }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #0ea5e9;
            --accent-light: #38bdf8;
            --accent-dark: #0284c7;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-light: #f1f5f9;
            --bg-dark: #0f172a;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent-dark); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
        h2 { font-size: clamp(1.4rem, 2.8vw, 2rem); }
        h3 { font-size: clamp(1.1rem, 1.8vw, 1.4rem); }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; }
        .container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 860px; }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .text-muted { color: var(--text-secondary); }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mb-5 { margin-bottom: 3rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-4 { margin-top: 2rem; }
        .gap-2 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-between { display: flex; align-items: center; justify-content: space-between; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 12px 28px; font-weight: 600; font-size: 1rem; line-height: 1.2;
            border-radius: var(--radius-md); transition: all var(--transition);
            text-decoration: none; cursor: pointer; border: 2px solid transparent;
        }
        .btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
        .btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(14,165,233,0.35); }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(14,165,233,0.25); }
        .btn-outline { background: transparent; color: var(--accent); border-color: var(--accent); }
        .btn-outline:hover { background: var(--accent); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(14,165,233,0.2); }
        .btn-outline:active { transform: translateY(0); }
        .btn-white { background: #fff; color: var(--primary); border-color: #fff; }
        .btn-white:hover { background: var(--bg-light); border-color: var(--bg-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }
        .btn-sm { padding: 8px 18px; font-size: 0.875rem; border-radius: var(--radius-sm); }
        .btn-lg { padding: 16px 36px; font-size: 1.1rem; }

        /* ===== 标签/徽章 ===== */
        .badge {
            display: inline-block; padding: 4px 14px; font-size: 0.8rem; font-weight: 600;
            border-radius: 100px; background: var(--bg-light); color: var(--text-secondary);
            transition: all var(--transition);
        }
        .badge-primary { background: rgba(14,165,233,0.12); color: var(--accent); }
        .badge-warning { background: rgba(245,158,11,0.15); color: #d97706; }
        .badge-success { background: rgba(16,185,129,0.15); color: #059669; }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-white); border-radius: var(--radius-md);
            border: 1px solid var(--border); box-shadow: var(--shadow-sm);
            transition: all var(--transition); overflow: hidden;
        }
        .card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .card-body { padding: 24px; }
        .card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: var(--radius-md) var(--radius-md) 0 0; }

        /* ===== 分隔线 ===== */
        .divider { width: 60px; height: 4px; background: var(--accent); border-radius: 4px; margin: 16px 0 24px; }
        .divider-center { margin-left: auto; margin-right: auto; }

        /* ===== 页面骨架 ===== */
        .page-wrapper { display: flex; flex-direction: column; min-height: 100vh; }
        main { flex: 1; }

        /* ===== Header / 导航 ===== */
        .header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-h); background: rgba(255,255,255,0.96); backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border); box-shadow: var(--shadow-sm);
        }
        .header .container { height: 100%; display: flex; align-items: center; justify-content: space-between; }
        .logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 800; color: var(--primary); }
        .logo i { color: var(--accent); font-size: 1.5rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

        .nav-list { display: flex; align-items: center; gap: 6px; }
        .nav-list a {
            display: block; padding: 8px 18px; font-weight: 500; font-size: 0.95rem;
            color: var(--text-secondary); border-radius: var(--radius-sm);
            transition: all var(--transition); text-decoration: none;
        }
        .nav-list a:hover { color: var(--primary); background: var(--bg-light); }
        .nav-list a.active { color: var(--accent); background: rgba(14,165,233,0.1); font-weight: 600; }

        .header-actions { display: flex; align-items: center; gap: 12px; }
        .search-box {
            display: flex; align-items: center; background: var(--bg-light);
            border-radius: 100px; padding: 0 16px; border: 1px solid transparent;
            transition: all var(--transition);
        }
        .search-box:focus-within { border-color: var(--accent); background: #fff; box-shadow: 0 0 0 4px rgba(14,165,233,0.1); }
        .search-box input { background: transparent; border: none; padding: 8px 12px; font-size: 0.9rem; color: var(--text-primary); width: 150px; }
        .search-box input::placeholder { color: var(--text-light); }
        .search-box button { color: var(--text-light); padding: 6px 4px; transition: color var(--transition); }
        .search-box button:hover { color: var(--accent); }

        .menu-toggle { display: none; font-size: 1.5rem; color: var(--text-primary); padding: 4px; }

        /* ===== 文章 Banner ===== */
        .article-banner {
            padding: 140px 0 60px; margin-top: var(--header-h);
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            position: relative; overflow: hidden;
        }
        .article-banner::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15; mix-blend-mode: overlay;
        }
        .article-banner .container { position: relative; z-index: 1; }
        .article-banner .breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-bottom: 20px; }
        .article-banner .breadcrumb a { color: rgba(255,255,255,0.8); transition: color var(--transition); }
        .article-banner .breadcrumb a:hover { color: #fff; }
        .article-banner .breadcrumb span { color: rgba(255,255,255,0.5); }
        .article-banner h1 { color: #fff; font-size: clamp(1.6rem, 3.5vw, 2.4rem); max-width: 800px; margin-bottom: 16px; line-height: 1.3; }
        .article-meta { display: flex; flex-wrap: wrap; gap: 16px 24px; color: rgba(255,255,255,0.75); font-size: 0.9rem; }
        .article-meta i { margin-right: 6px; }
        .article-meta .badge { background: rgba(255,255,255,0.15); color: #fff; }

        /* ===== 文章正文 ===== */
        .article-section { padding: 60px 0 80px; }
        .article-content {
            background: #fff; border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md); padding: 48px 56px;
            border: 1px solid var(--border);
        }
        .article-content .lead { font-size: 1.15rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 2rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
        .article-content .content-body { font-size: 1.05rem; line-height: 1.85; color: var(--text-primary); }
        .article-content .content-body p { margin-bottom: 1.2rem; }
        .article-content .content-body h2, .article-content .content-body h3 { margin-top: 2rem; margin-bottom: 1rem; }
        .article-content .content-body ul { list-style: disc; padding-left: 1.5rem; margin-bottom: 1.2rem; }
        .article-content .content-body ul li { margin-bottom: 0.4rem; }
        .article-content .content-body img { border-radius: var(--radius-md); margin: 1.5rem 0; box-shadow: var(--shadow-sm); }

        .article-footer { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px; }
        .article-tags { display: flex; flex-wrap: wrap; gap: 8px; }
        .article-share { display: flex; align-items: center; gap: 10px; color: var(--text-light); font-size: 0.9rem; }
        .article-share a { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 50%; background: var(--bg-light); color: var(--text-secondary); transition: all var(--transition); }
        .article-share a:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }

        /* ===== 文章未找到 ===== */
        .not-found-box { text-align: center; padding: 80px 24px; }
        .not-found-box i { font-size: 4rem; color: var(--text-light); margin-bottom: 24px; }
        .not-found-box h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }

        /* ===== 相关推荐 ===== */
        .related-section { background: var(--bg-light); padding: 60px 0; }
        .related-section h2 { margin-bottom: 32px; }
        .related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
        .related-card { display: flex; flex-direction: column; }
        .related-card .card-body { flex: 1; display: flex; flex-direction: column; }
        .related-card .card-body h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .related-card .card-body h3 a { color: var(--text-primary); transition: color var(--transition); }
        .related-card .card-body h3 a:hover { color: var(--accent); }
        .related-card .card-body p { font-size: 0.9rem; color: var(--text-secondary); flex: 1; }
        .related-card .card-body .meta { font-size: 0.8rem; color: var(--text-light); margin-top: 12px; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.85);
            padding: 60px 0 0; margin-top: auto;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
        .footer-brand .logo { margin-bottom: 16px; color: #fff; }
        .footer-brand .logo i { color: var(--accent-light); }
        .footer-brand .logo span { background: none; -webkit-text-fill-color: #fff; color: #fff; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 320px; }
        .footer h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
        .footer ul li { margin-bottom: 10px; }
        .footer ul li a { color: rgba(255,255,255,0.6); font-size: 0.9rem; transition: color var(--transition); text-decoration: none; }
        .footer ul li a:hover { color: var(--accent-light); }
        .footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; padding: 24px 0; font-size: 0.85rem; color: rgba(255,255,255,0.4); gap: 12px; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .article-content { padding: 36px 32px; }
        }

        @media (max-width: 768px) {
            :root { --header-h: 64px; }
            .nav-list { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); flex-direction: column; padding: 16px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); }
            .nav-list.open { display: flex; }
            .nav-list a { padding: 12px 16px; width: 100%; }
            .menu-toggle { display: block; }
            .search-box input { width: 100px; }
            .article-banner { padding: 110px 0 40px; }
            .article-banner h1 { font-size: 1.4rem; }
            .article-content { padding: 28px 20px; border-radius: var(--radius-md); }
            .article-content .lead { font-size: 1rem; }
            .article-content .content-body { font-size: 1rem; }
            .article-footer { flex-direction: column; align-items: flex-start; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-content { padding: 20px 16px; }
            .article-meta { gap: 10px 16px; font-size: 0.8rem; }
            .search-box input { width: 80px; }
            .header-actions .btn { padding: 8px 14px; font-size: 0.8rem; }
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
        .animate-in { animation: fadeInUp 0.5s ease forwards; }