/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #1a3a5c;
            --color-primary-light: #2a5a8c;
            --color-primary-dark: #0f2440;
            --color-secondary: #e8a838;
            --color-secondary-light: #f0c060;
            --color-secondary-dark: #c88a20;
            --color-accent: #d94a4a;
            --color-bg: #f8f9fc;
            --color-bg-alt: #eef1f6;
            --color-bg-dark: #1a1e2e;
            --color-text: #1e2a3a;
            --color-text-light: #5a6a7e;
            --color-text-lighter: #8a9aaa;
            --color-text-on-dark: #f0f2f5;
            --color-border: #dce0e8;
            --color-border-light: #e8ecf2;
            --color-white: #ffffff;
            --color-success: #2a9d6e;
            --color-warning: #e8a838;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 64px rgba(0,0,0,0.16);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 32px;
            --spacing-xl: 64px;
            --spacing-2xl: 96px;
            --max-width: 1200px;
            --header-height: 72px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--color-primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover, a:focus { color: var(--color-primary); }
        a:focus-visible { outline: 3px solid var(--color-secondary); outline-offset: 2px; border-radius: var(--radius-sm); }
        button { cursor: pointer; font-family: inherit; font-size: 1rem; border: none; background: none; transition: all var(--transition); }
        button:focus-visible { outline: 3px solid var(--color-secondary); outline-offset: 2px; }
        input, textarea, select { font-family: inherit; font-size: 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 10px 16px; background: var(--color-white); transition: border-color var(--transition), box-shadow var(--transition); }
        input:focus, textarea:focus, select:focus { outline: none; border-color: var(--color-primary-light); box-shadow: 0 0 0 3px rgba(26,58,92,0.1); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 600; color: var(--color-primary-dark); }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
        h2 { font-size: clamp(1.5rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; color: var(--color-text-light); }
        ::selection { background: var(--color-primary); color: var(--color-white); }

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

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--color-border-light);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled { background: rgba(255,255,255,0.98); box-shadow: var(--shadow-sm); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            letter-spacing: -0.3px;
        }
        .logo i { font-size: 1.6rem; color: var(--color-secondary); }
        .logo span { background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.85; }
        .nav-main { display: flex; align-items: center; gap: var(--spacing-lg); }
        .nav-main a {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-light);
            padding: 6px 0;
            transition: color var(--transition);
        }
        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-secondary);
            transition: width var(--transition);
            border-radius: 2px;
        }
        .nav-main a:hover, .nav-main a.active { color: var(--color-primary-dark); }
        .nav-main a:hover::after, .nav-main a.active::after { width: 100%; }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--color-bg-alt);
            border-radius: 40px;
            padding: 0 16px;
            border: 1px solid var(--color-border-light);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .nav-search:focus-within { border-color: var(--color-primary-light); box-shadow: 0 0 0 3px rgba(26,58,92,0.08); }
        .nav-search i { color: var(--color-text-lighter); font-size: 0.9rem; }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 8px 10px;
            font-size: 0.9rem;
            width: 160px;
            color: var(--color-text);
        }
        .nav-search input::placeholder { color: var(--color-text-lighter); }
        .nav-search input:focus { box-shadow: none; }
        .btn-login {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-primary-dark);
            padding: 8px 20px;
            border-radius: 40px;
            border: 1px solid var(--color-border);
            background: var(--color-white);
            transition: all var(--transition);
        }
        .btn-login:hover { background: var(--color-bg-alt); border-color: var(--color-primary-light); }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-white);
            padding: 12px 28px;
            border-radius: 40px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            box-shadow: 0 4px 16px rgba(26,58,92,0.25);
            transition: all var(--transition);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(26,58,92,0.35); color: var(--color-white); }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-primary-dark);
            padding: 12px 28px;
            border-radius: 40px;
            background: var(--color-white);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }
        .btn-secondary:hover { background: var(--color-bg-alt); border-color: var(--color-primary-light); transform: translateY(-2px); }

        /* 移动端菜单按钮 */
        .menu-toggle { display: none; font-size: 1.6rem; color: var(--color-primary-dark); padding: 4px; }
        @media (max-width: 900px) {
            .nav-main, .nav-actions { display: none; }
            .menu-toggle { display: block; }
            .header-inner { padding: 0 var(--spacing-md); }
            .nav-mobile-open .nav-main,
            .nav-mobile-open .nav-actions {
                display: flex;
                flex-direction: column;
                align-items: stretch;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-white);
                padding: var(--spacing-md) var(--spacing-lg);
                border-bottom: 1px solid var(--color-border-light);
                box-shadow: var(--shadow-lg);
                gap: var(--spacing-sm);
            }
            .nav-mobile-open .nav-main a { padding: 10px 0; font-size: 1.05rem; }
            .nav-mobile-open .nav-actions { flex-direction: row; flex-wrap: wrap; padding-top: var(--spacing-sm); border-top: 1px solid var(--color-border-light); margin-top: var(--spacing-sm); }
            .nav-mobile-open .nav-search { flex: 1; }
            .nav-mobile-open .nav-search input { width: 100%; }
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            padding-top: var(--header-height);
            overflow: hidden;
            background: var(--color-bg-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.4;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,30,46,0.92) 0%, rgba(26,30,46,0.6) 60%, rgba(26,30,46,0.3) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            padding: var(--spacing-2xl) 0;
            color: var(--color-text-on-dark);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(232,168,56,0.18);
            border: 1px solid rgba(232,168,56,0.3);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-secondary-light);
            margin-bottom: var(--spacing-lg);
            backdrop-filter: blur(4px);
        }
        .hero-badge i { font-size: 0.8rem; }
        .hero h1 {
            color: var(--color-white);
            font-weight: 700;
            margin-bottom: var(--spacing-md);
            letter-spacing: -0.5px;
        }
        .hero h1 span { color: var(--color-secondary); }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin-bottom: var(--spacing-lg);
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            align-items: center;
        }
        .hero-actions .btn-primary {
            padding: 14px 36px;
            font-size: 1.05rem;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
            color: var(--color-primary-dark);
            box-shadow: 0 6px 24px rgba(232,168,56,0.35);
        }
        .hero-actions .btn-primary:hover { box-shadow: 0 10px 36px rgba(232,168,56,0.5); transform: translateY(-3px); }
        .hero-actions .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text-on-dark);
            padding: 12px 28px;
            border-radius: 40px;
            border: 1px solid rgba(255,255,255,0.3);
            transition: all var(--transition);
        }
        .hero-actions .btn-outline-light:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.5); color: var(--color-white); }
        .hero-stats {
            display: flex;
            gap: var(--spacing-xl);
            margin-top: var(--spacing-xl);
            padding-top: var(--spacing-lg);
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero-stat h3 { color: var(--color-white); font-size: 1.8rem; font-weight: 700; }
        .hero-stat h3 i { color: var(--color-secondary); margin-right: 6px; }
        .hero-stat p { font-size: 0.9rem; color: rgba(255,255,255,0.55); margin: 0; }
        @media (max-width: 768px) {
            .hero { min-height: 70vh; }
            .hero-stats { flex-wrap: wrap; gap: var(--spacing-lg); }
            .hero-stat { flex: 1 1 40%; }
        }
        @media (max-width: 520px) {
            .hero-content { padding: var(--spacing-xl) 0; }
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: var(--spacing-md); }
            .hero-stat h3 { font-size: 1.4rem; }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-2xl) 0;
        }
        .section-alt { background: var(--color-bg-alt); }
        .section-dark { background: var(--color-bg-dark); color: var(--color-text-on-dark); }
        .section-dark h2, .section-dark h3, .section-dark .section-subtitle { color: var(--color-white); }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.6); }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto var(--spacing-xl);
        }
        .section-header h2 { margin-bottom: var(--spacing-sm); }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-light);
            margin: 0;
        }
        .section-header .section-subtitle { margin-top: var(--spacing-sm); }

        /* ===== 核心说明板块 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .intro-image img { width: 100%; height: 100%; object-fit: cover; min-height: 360px; }
        .intro-text h2 { margin-bottom: var(--spacing-md); }
        .intro-text p { font-size: 1.05rem; line-height: 1.8; }
        .intro-text .intro-features { margin-top: var(--spacing-lg); display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
        .intro-feature-item { display: flex; gap: 12px; align-items: flex-start; }
        .intro-feature-item i { color: var(--color-secondary); font-size: 1.2rem; margin-top: 2px; flex-shrink: 0; }
        .intro-feature-item h4 { font-size: 1rem; margin-bottom: 4px; color: var(--color-primary-dark); }
        .intro-feature-item p { font-size: 0.9rem; color: var(--color-text-lighter); margin: 0; }
        @media (max-width: 900px) {
            .intro-grid { grid-template-columns: 1fr; }
            .intro-image { order: -1; }
        }
        @media (max-width: 520px) {
            .intro-text .intro-features { grid-template-columns: 1fr; }
        }

        /* ===== 分类入口 / 服务卡片 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .card-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }
        .card-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--color-border); }
        .card-item .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-white);
            margin-bottom: var(--spacing-md);
        }
        .card-item .card-icon.alt { background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark)); color: var(--color-primary-dark); }
        .card-item h3 { font-size: 1.15rem; margin-bottom: var(--spacing-sm); }
        .card-item p { font-size: 0.95rem; color: var(--color-text-lighter); margin-bottom: var(--spacing-md); }
        .card-item .card-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 500;
            padding: 2px 12px;
            border-radius: 40px;
            background: var(--color-bg-alt);
            color: var(--color-text-light);
        }
        .card-item .card-tag.hot { background: rgba(217,74,74,0.1); color: var(--color-accent); }
        .card-item .card-tag.new { background: rgba(42,157,110,0.1); color: var(--color-success); }
        @media (max-width: 900px) {
            .card-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .card-grid { grid-template-columns: 1fr; }
        }

        /* ===== 内容 / 资讯列表 ===== */
        .content-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
        .content-card {
            display: flex;
            gap: var(--spacing-md);
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }
        .content-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .content-card-thumb {
            width: 120px;
            min-height: 90px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--color-bg-alt);
        }
        .content-card-thumb img { width: 100%; height: 100%; object-fit: cover; }
        .content-card-body { flex: 1; min-width: 0; }
        .content-card-body h4 { font-size: 1rem; margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .content-card-body h4 a { color: var(--color-primary-dark); }
        .content-card-body h4 a:hover { color: var(--color-primary-light); }
        .content-card-body .meta {
            display: flex;
            gap: var(--spacing-sm);
            font-size: 0.8rem;
            color: var(--color-text-lighter);
            margin-bottom: 8px;
            flex-wrap: wrap;
        }
        .content-card-body .meta span { display: inline-flex; align-items: center; gap: 4px; }
        .content-card-body .excerpt { font-size: 0.9rem; color: var(--color-text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin: 0; }
        .content-card .badge {
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 40px;
            background: var(--color-bg-alt);
            color: var(--color-text-light);
        }
        .content-card .badge.primary { background: rgba(26,58,92,0.1); color: var(--color-primary); }
        .list-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: var(--spacing-xl);
            color: var(--color-text-lighter);
            font-size: 1rem;
            background: var(--color-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--color-border);
        }
        @media (max-width: 768px) {
            .content-list { grid-template-columns: 1fr; }
            .content-card-thumb { width: 90px; min-height: 70px; }
        }

        /* ===== 数据 / 流程板块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
            text-align: center;
        }
        .stat-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg) var(--spacing-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }
        .stat-item h3 { font-size: 2.2rem; font-weight: 700; color: var(--color-primary); margin-bottom: 4px; }
        .stat-item h3 i { color: var(--color-secondary); font-size: 1.6rem; margin-right: 4px; }
        .stat-item p { font-size: 0.9rem; color: var(--color-text-lighter); margin: 0; }
        @media (max-width: 900px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .stats-grid { grid-template-columns: 1fr; }
        }

        /* 流程步骤 */
        .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-xl); position: relative; }
        .steps::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 15%;
            right: 15%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary-light), var(--color-secondary), var(--color-primary-light));
            opacity: 0.3;
        }
        .step-item { text-align: center; position: relative; }
        .step-number {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            color: var(--color-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 700;
            margin: 0 auto var(--spacing-md);
            box-shadow: 0 6px 24px rgba(26,58,92,0.2);
            position: relative;
            z-index: 2;
        }
        .step-item:nth-child(2) .step-number { background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark)); color: var(--color-primary-dark); }
        .step-item:nth-child(3) .step-number { background: linear-gradient(135deg, var(--color-accent), #c0392b); }
        .step-item h4 { margin-bottom: var(--spacing-sm); }
        .step-item p { font-size: 0.95rem; color: var(--color-text-lighter); margin: 0; }
        @media (max-width: 768px) {
            .steps { grid-template-columns: 1fr; gap: var(--spacing-lg); }
            .steps::before { display: none; }
            .step-item { display: flex; gap: var(--spacing-md); text-align: left; align-items: flex-start; }
            .step-number { margin: 0; flex-shrink: 0; width: 48px; height: 48px; font-size: 1.1rem; }
        }

        /* ===== 特色 / 优势 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }
        .feature-item {
            display: flex;
            gap: var(--spacing-md);
            padding: var(--spacing-lg);
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }
        .feature-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .feature-item i {
            font-size: 1.6rem;
            color: var(--color-secondary);
            flex-shrink: 0;
            margin-top: 4px;
        }
        .feature-item h4 { margin-bottom: 6px; }
        .feature-item p { font-size: 0.95rem; color: var(--color-text-lighter); margin: 0; }
        @media (max-width: 768px) {
            .feature-grid { grid-template-columns: 1fr; }
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: var(--spacing-sm); }
        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--color-border); box-shadow: var(--shadow-sm); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-md) var(--spacing-lg);
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--color-primary-dark);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: var(--color-bg-alt); }
        .faq-question i { font-size: 1.2rem; color: var(--color-text-lighter); transition: transform var(--transition); }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--color-primary); }
        .faq-answer {
            padding: 0 var(--spacing-lg) var(--spacing-md);
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }
        @media (max-width: 520px) {
            .faq-question { padding: var(--spacing-md); font-size: 0.95rem; }
            .faq-answer { padding: 0 var(--spacing-md) var(--spacing-md); }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl) var(--spacing-2xl);
            text-align: center;
            color: var(--color-white);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }
        .cta-section h2 { color: var(--color-white); margin-bottom: var(--spacing-sm); position: relative; }
        .cta-section p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto var(--spacing-lg); font-size: 1.05rem; position: relative; }
        .cta-section .btn-primary {
            background: var(--color-secondary);
            color: var(--color-primary-dark);
            padding: 14px 40px;
            font-size: 1.05rem;
            box-shadow: 0 6px 24px rgba(232,168,56,0.3);
            position: relative;
        }
        .cta-section .btn-primary:hover { box-shadow: 0 10px 36px rgba(232,168,56,0.45); transform: translateY(-3px); }
        @media (max-width: 768px) {
            .cta-section { padding: var(--spacing-xl) var(--spacing-lg); }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-bg-dark);
            color: var(--color-text-on-dark);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }
        .footer-brand .logo { color: var(--color-white); margin-bottom: var(--spacing-md); }
        .footer-brand .logo i { color: var(--color-secondary); }
        .footer-brand .logo span { -webkit-text-fill-color: var(--color-white); background: none; }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); max-width: 300px; margin: 0; }
        .footer-col h4 { color: var(--color-white); font-size: 1rem; margin-bottom: var(--spacing-md); }
        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.5);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--color-secondary); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: var(--spacing-lg);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.35); }
        .footer-bottom a:hover { color: var(--color-secondary); }
        .footer-social { display: flex; gap: var(--spacing-sm); }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.5);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--color-secondary); color: var(--color-primary-dark); }
        @media (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

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

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-soft: #1e293b;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --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);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

        /* ===== 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);
            background: var(--bg);
        }

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

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

        a:hover {
            color: var(--primary-dark);
        }

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--secondary);
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

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

        .site-header:hover {
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: -0.5px;
            text-decoration: none;
            flex-shrink: 0;
        }

        .logo i {
            font-size: 26px;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 8px;
            border-radius: var(--radius-sm);
        }

        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-main a {
            position: relative;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            text-decoration: none;
        }

        .nav-main a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }

        .nav-main a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }

        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-toggle {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--bg);
            color: var(--text-light);
            cursor: pointer;
            transition: all var(--transition);
            font-size: 16px;
        }

        .search-toggle:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: var(--primary);
            color: #fff !important;
            font-weight: 600;
            font-size: 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            cursor: pointer;
            border: none;
            text-decoration: none;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
        }

        .btn-primary i {
            font-size: 14px;
        }

        .mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--bg);
            color: var(--text);
            cursor: pointer;
            font-size: 20px;
            border: none;
            transition: background var(--transition);
        }

        .mobile-toggle:hover {
            background: var(--primary-bg);
        }

        @media (max-width: 768px) {
            .nav-main {
                position: fixed;
                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: 20px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s ease;
                box-shadow: var(--shadow-lg);
            }

            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-main a {
                width: 100%;
                padding: 14px 18px;
                font-size: 16px;
            }

            .nav-main a.active::after {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .nav-actions .btn-primary span {
                display: none;
            }

            .nav-actions .btn-primary {
                padding: 10px 14px;
            }
        }

        /* ===== Hero / 分类首屏 ===== */
        .category-hero {
            margin-top: var(--header-height);
            padding: 80px 0 64px;
            background: linear-gradient(135deg, var(--primary-bg) 0%, #dbeafe 50%, #eff6ff 100%);
            position: relative;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .category-hero-content {
            max-width: 720px;
        }

        .category-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: rgba(37, 99, 235, 0.12);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 100px;
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }

        .category-hero h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.15;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .category-hero h1 span {
            color: var(--primary);
        }

        .category-hero p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .category-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            align-items: center;
        }

        .category-hero-meta .stat {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
        }

        .category-hero-meta .stat i {
            color: var(--primary);
            font-size: 16px;
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 60px 0 48px;
                min-height: auto;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero p {
                font-size: 16px;
            }
            .category-hero-meta {
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero p {
                font-size: 15px;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }

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

        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }

        .section-dark h2,
        .section-dark h3,
        .section-dark .section-subtitle {
            color: var(--text-white);
        }

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

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }

        .section-header .section-subtitle {
            font-size: 16px;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-header .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 100px;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        @media (max-width: 768px) {
            .section {
                --spacing-section: 48px;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== 官方通道板块 ===== */
        .channel-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .channel-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .channel-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            opacity: 0;
            transition: opacity var(--transition);
        }

        .channel-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .channel-card:hover::before {
            opacity: 1;
        }

        .channel-card .icon-wrap {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-bg);
            border-radius: var(--radius-sm);
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 18px;
            transition: all var(--transition);
        }

        .channel-card:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
        }

        .channel-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--secondary);
        }

        .channel-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .channel-card .tag {
            display: inline-block;
            padding: 3px 12px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            border-radius: 100px;
        }

        .channel-card .tag.tag-accent {
            background: #fef3c7;
            color: #b45309;
        }

        .channel-card .tag.tag-success {
            background: #dcfce7;
            color: #16a34a;
        }

        @media (max-width: 992px) {
            .channel-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .channel-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 步骤流程 ===== */
        .steps-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }

        .step-item {
            display: flex;
            gap: 24px;
            padding: 28px 0;
            border-bottom: 1px solid var(--border);
            align-items: flex-start;
        }

        .step-item:first-child {
            padding-top: 0;
        }

        .step-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            border-radius: 50%;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        .step-content {
            flex: 1;
        }

        .step-content h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--secondary);
        }

        .step-content p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }

        .step-content .step-hint {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 10px;
            font-size: 13px;
            color: var(--primary);
            font-weight: 500;
        }

        .step-content .step-hint i {
            font-size: 14px;
        }

        @media (max-width: 520px) {
            .step-item {
                flex-direction: column;
                gap: 12px;
                padding: 20px 0;
            }
            .step-num {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }
            .step-content h3 {
                font-size: 16px;
            }
        }

        /* ===== 安全提示板块 ===== */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .security-item {
            display: flex;
            gap: 16px;
            padding: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }

        .security-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
        }

        .security-item .sec-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #fef2f2;
            color: #dc2626;
            border-radius: var(--radius-sm);
            font-size: 18px;
        }

        .security-item .sec-icon.sec-ok {
            background: #dcfce7;
            color: #16a34a;
        }

        .security-item .sec-icon.sec-warn {
            background: #fef3c7;
            color: #d97706;
        }

        .security-item .sec-icon.sec-info {
            background: var(--primary-bg);
            color: var(--primary);
        }

        .security-item h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--secondary);
        }

        .security-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .security-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            background: none;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary);
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }

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

        .faq-question i {
            font-size: 16px;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }

        @media (max-width: 520px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .cta-content p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .cta-content .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: #fff;
            color: var(--primary) !important;
            font-weight: 700;
            font-size: 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }

        .cta-content .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
            background: #f8fafc;
        }

        .cta-content .btn-cta i {
            font-size: 16px;
        }

        .cta-content .cta-meta {
            margin-top: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-content h2 {
                font-size: 26px;
            }
            .cta-content p {
                font-size: 15px;
            }
            .cta-content .btn-cta {
                padding: 14px 28px;
                font-size: 15px;
            }
        }

        /* ===== 相关推荐 ===== */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .related-card .card-img {
            height: 180px;
            background: var(--primary-bg);
            position: relative;
            overflow: hidden;
        }

        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .related-card .card-img .img-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 12px 16px;
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.4));
        }

        .related-card .card-img .img-overlay .tag {
            display: inline-block;
            padding: 2px 10px;
            background: rgba(255, 255, 255, 0.9);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            border-radius: 100px;
        }

        .related-card .card-body {
            padding: 20px 20px 24px;
        }

        .related-card .card-body h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--secondary);
            line-height: 1.4;
        }

        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .related-card .card-body .card-link i {
            font-size: 12px;
            transition: transform var(--transition);
        }

        .related-card .card-body .card-link:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 992px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
            font-size: 20px;
        }

        .footer-brand .logo i {
            background: rgba(255, 255, 255, 0.1);
            color: var(--primary-light);
        }

        .footer-brand .logo span {
            background: linear-gradient(135deg, #fff, #cbd5e1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            text-decoration: none;
            transition: all var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0 32px;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-bottom span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.5);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            font-size: 16px;
            text-decoration: none;
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        @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;
                gap: 24px;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }

        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .mb-48 {
            margin-bottom: 48px;
        }

        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-48 {
            margin-top: 48px;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 992px) {
            .header-inner {
                padding: 0 16px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 20px;
                padding: 6px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 22px;
            }
            .category-hero p {
                font-size: 14px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .cta-content h2 {
                font-size: 22px;
            }
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg);
        }

        ::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 3px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }

        /* ===== 焦点 ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #c0392b;
            --primary-dark: #a93226;
            --primary-light: #e74c3c;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --bg-body: #f5f6fa;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-weak: #8e8ea0;
            --text-inverse: #ffffff;
            --border: #e0e0e0;
            --border-light: #f0f0f0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
        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 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .logo i { font-size: 1.6rem; color: var(--primary); }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            position: relative;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .nav-main a:hover { color: var(--primary); background: rgba(192,57,43,0.06); }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(192,57,43,0.10);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px; left: 50%;
            transform: translateX(-50%);
            width: 20px; height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 0 16px;
            transition: all var(--transition);
        }
        .search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(192,57,43,0.12); }
        .search-box input {
            border: none;
            background: transparent;
            padding: 8px 0;
            width: 140px;
            outline: none;
            font-size: 0.9rem;
            color: var(--text-primary);
        }
        .search-box input::placeholder { color: var(--text-weak); }
        .search-box button {
            border: none;
            background: transparent;
            color: var(--text-weak);
            cursor: pointer;
            padding: 6px 0 6px 10px;
            transition: color var(--transition);
        }
        .search-box button:hover { color: var(--primary); }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border: none;
            border-radius: 24px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--text-inverse);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 14px rgba(192,57,43,0.30);
        }
        .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(192,57,43,0.40); color: #fff; }
        .btn-cta:active { transform: translateY(0); }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border: 1.5px solid var(--border);
            border-radius: 24px;
            background: transparent;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition);
        }
        .btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(192,57,43,0.04); }
        .nav-toggle {
            display: none;
            border: none;
            background: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px;
        }
        @media (max-width: 900px) {
            .nav-main { display: none; }
            .nav-main.open { display: flex; flex-direction: column; position: absolute; top: var(--header-height); left: 0; right: 0; background: var(--bg-white); padding: 16px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); gap: 4px; }
            .nav-main a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav-main a.active::after { display: none; }
            .nav-main a.active { background: rgba(192,57,43,0.08); }
            .nav-actions .search-box { display: none; }
            .nav-actions .btn-outline { display: none; }
            .nav-toggle { display: block; }
        }
        @media (max-width: 520px) {
            .btn-cta { padding: 8px 16px; font-size: 0.8rem; }
            .logo { font-size: 1.1rem; }
            .logo i { font-size: 1.3rem; }
        }

        /* ===== Article Banner ===== */
        .article-banner {
            margin-top: var(--header-height);
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(26,26,46,0.85), rgba(44,62,80,0.90)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 60px 24px;
            text-align: center;
        }
        .article-banner .banner-content {
            max-width: 800px;
            color: var(--text-inverse);
        }
        .article-banner .banner-cat {
            display: inline-block;
            padding: 6px 18px;
            background: var(--primary);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 16px;
            color: #fff;
        }
        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.20);
        }
        .article-banner .banner-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.80);
        }
        .article-banner .banner-meta i { margin-right: 6px; }
        @media (max-width: 768px) {
            .article-banner { min-height: 240px; padding: 40px 16px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-banner .banner-meta { flex-wrap: wrap; gap: 12px; font-size: 0.8rem; }
        }
        @media (max-width: 520px) {
            .article-banner h1 { font-size: 1.3rem; }
        }

        /* ===== Article Main Content ===== */
        .article-section {
            padding: 60px 0;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 40px;
            box-shadow: var(--shadow-sm);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-weak);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-weak); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-secondary); }
        .breadcrumb i { font-size: 0.7rem; color: var(--text-weak); }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-content p { margin-bottom: 1.2em; }
        .article-content h2 { font-size: 1.5rem; margin: 1.5em 0 0.6em; color: var(--text-primary); }
        .article-content h3 { font-size: 1.2rem; margin: 1.2em 0 0.5em; color: var(--text-primary); }
        .article-content ul, .article-content ol { padding-left: 1.5em; margin-bottom: 1.2em; }
        .article-content li { margin-bottom: 0.4em; list-style: disc; }
        .article-content a { color: var(--primary); text-decoration: underline; }
        .article-content a:hover { color: var(--primary-dark); }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            margin: 1.5em 0;
            background: rgba(192,57,43,0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content img { border-radius: var(--radius-sm); margin: 1.2em 0; box-shadow: var(--shadow-sm); }
        .article-content table { width: 100%; border-collapse: collapse; margin: 1.2em 0; }
        .article-content th, .article-content td { padding: 10px 14px; border: 1px solid var(--border); text-align: left; }
        .article-content th { background: var(--bg-body); font-weight: 600; }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            padding: 6px 16px;
            background: var(--bg-body);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary); color: #fff; }
        .article-nav {
            display: flex;
            justify-content: space-between;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            gap: 16px;
            flex-wrap: wrap;
        }
        .article-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .article-nav a:hover { border-color: var(--primary); color: var(--primary); background: rgba(192,57,43,0.04); }
        .article-nav .prev i { margin-right: 6px; }
        .article-nav .next i { margin-left: 6px; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-light);
            color: var(--text-primary);
        }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            transition: color var(--transition);
        }
        .sidebar-list a:hover { color: var(--primary); }
        .sidebar-list a i { margin-top: 4px; color: var(--primary); font-size: 0.8rem; }
        .sidebar-list .list-meta {
            display: block;
            font-size: 0.75rem;
            color: var(--text-weak);
            margin-top: 4px;
        }
        .sidebar-cat {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .sidebar-cat a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            background: var(--bg-body);
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            transition: all var(--transition);
        }
        .sidebar-cat a:hover { background: var(--primary); color: #fff; }
        .sidebar-cat a i { font-size: 0.9rem; }

        @media (max-width: 900px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-body { padding: 28px; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        }
        @media (max-width: 640px) {
            .article-body { padding: 20px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .article-content { font-size: 0.98rem; }
            .article-nav { flex-direction: column; align-items: stretch; }
            .article-nav a { justify-content: center; }
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-white);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 32px;
            position: relative;
            padding-bottom: 14px;
        }
        .related-section .section-title::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0;
            width: 50px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-body);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body h4 a { color: var(--text-primary); }
        .related-card .card-body h4 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-weak);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 12px;
            font-size: 0.78rem;
            color: var(--text-weak);
        }
        @media (max-width: 900px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 640px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-card .card-img { height: 200px; }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 60px 0;
            background: var(--bg-body);
        }
        .faq-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 32px;
            text-align: center;
            position: relative;
            padding-bottom: 14px;
        }
        .faq-section .section-title::after {
            content: '';
            position: absolute;
            bottom: 0; left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--border); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            transition: color var(--transition);
            user-select: none;
        }
        .faq-question i { transition: transform var(--transition); color: var(--primary); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        @media (max-width: 640px) {
            .faq-question { padding: 14px 16px; font-size: 0.92rem; }
            .faq-answer { font-size: 0.88rem; }
            .faq-item.open .faq-answer { padding: 0 16px 16px; }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, var(--secondary), var(--bg-dark)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            background-blend-mode: overlay;
            text-align: center;
            color: var(--text-inverse);
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta {
            font-size: 1.05rem;
            padding: 14px 36px;
            background: #fff;
            color: var(--primary);
            box-shadow: 0 6px 24px rgba(0,0,0,0.20);
        }
        .cta-section .btn-cta:hover { transform: translateY(-3px); box-shadow: 0 10px 32px rgba(0,0,0,0.30); color: var(--primary-dark); }
        .cta-section .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border: 2px solid rgba(255,255,255,0.70);
            border-radius: 24px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition);
            margin-left: 12px;
        }
        .cta-section .btn-outline-light:hover { background: rgba(255,255,255,0.12); border-color: #fff; }
        @media (max-width: 640px) {
            .cta-section { padding: 50px 16px; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section p { font-size: 0.95rem; }
            .cta-section .btn-cta, .cta-section .btn-outline-light { width: 100%; margin: 8px 0; justify-content: center; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.10);
        }
        .footer-brand .logo { color: #fff; font-size: 1.3rem; margin-bottom: 16px; display: inline-flex; }
        .footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; }
        .footer-brand .logo i { color: var(--primary-light); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.65); max-width: 320px; }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0;
            width: 28px;
            height: 2px;
            background: var(--primary-light);
            border-radius: 2px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            padding: 6px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover { color: #fff; padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.50);
        }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a { color: rgba(255,255,255,0.50); font-size: 1.2rem; transition: color var(--transition); }
        .footer-social a:hover { color: var(--primary-light); }
        @media (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 640px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found-box i { font-size: 3rem; color: var(--text-weak); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }
        .not-found-box .btn-cta { display: inline-flex; }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .gap-16 { gap: 16px; }

        /* ===== Print ===== */
        @media print {
            .site-header, .site-footer, .article-sidebar, .related-section, .faq-section, .cta-section, .nav-actions, .article-nav { display: none !important; }
            .article-banner { margin-top: 0; min-height: auto; padding: 30px; background: #fff !important; color: #000 !important; }
            .article-banner h1 { color: #000 !important; text-shadow: none; }
            .article-banner .banner-meta { color: #666 !important; }
            .article-body { box-shadow: none; padding: 20px 0; }
            .article-layout { grid-template-columns: 1fr; }
            body { background: #fff; }
        }