/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a237e;
            --primary-light: #283593;
            --primary-dark: #0d1442;
            --accent: #d4a853;
            --accent-light: #e8c97a;
            --accent-dark: #b8923a;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0d1442;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aaa;
            --text-inverse: #ffffff;
            --border-color: #e8e8f0;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(26, 35, 126, 0.06);
            --shadow-md: 0 8px 30px rgba(26, 35, 126, 0.08);
            --shadow-lg: 0 16px 48px rgba(26, 35, 126, 0.12);
            --shadow-xl: 0 24px 64px rgba(26, 35, 126, 0.16);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
        }
        /* ===== 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);
            color: var(--text-primary);
            background: var(--bg-light);
            line-height: 1.7;
            font-size: 16px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        .container-fluid {
            width: 100%;
            padding: 0 var(--spacing-sm);
        }
        .section {
            padding: var(--spacing-xl) 0;
        }
        .section-sm {
            padding: var(--spacing-lg) 0;
        }
        /* ===== 导航 —— 悬浮胶囊风格 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0.75rem 0;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .site-logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .site-logo:hover {
            color: var(--primary-dark);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-list a {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.6rem 1.25rem;
            border-radius: 100px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-list a:hover,
        .nav-list a:focus-visible {
            color: var(--primary);
            background: rgba(26, 35, 126, 0.06);
        }
        .nav-list a.active {
            color: var(--text-inverse);
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(26, 35, 126, 0.25);
        }
        .nav-list a.active:hover {
            background: var(--primary-light);
            color: var(--text-inverse);
        }
        .nav-list a.nav-cta {
            color: var(--text-inverse);
            background: var(--accent);
            box-shadow: 0 4px 16px rgba(212, 168, 83, 0.35);
        }
        .nav-list a.nav-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(212, 168, 83, 0.45);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: var(--bg-white);
            border-radius: 50%;
            box-shadow: var(--shadow-sm);
            cursor: pointer;
            font-size: 1.25rem;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-light);
            box-shadow: var(--shadow-md);
        }
        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: 72px;
                left: var(--spacing-sm);
                right: var(--spacing-sm);
                background: var(--bg-white);
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-xl);
                padding: 1rem;
                flex-direction: column;
                gap: 0.25rem;
                opacity: 0;
                visibility: hidden;
                transform: translateY(-12px);
                transition: var(--transition);
                border: 1px solid var(--border-color);
                max-height: 60vh;
                overflow-y: auto;
            }
            .nav-list.open {
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }
            .nav-list a {
                width: 100%;
                justify-content: center;
                padding: 0.75rem 1rem;
                border-radius: var(--radius-sm);
            }
            .nav-toggle {
                display: flex;
            }
            .site-logo {
                font-size: 1.15rem;
            }
        }
        @media (max-width: 520px) {
            .site-header .container {
                padding: 0 0.75rem;
            }
            .site-logo {
                font-size: 1rem;
            }
            .nav-list a {
                font-size: 0.85rem;
                padding: 0.6rem 0.9rem;
            }
        }
        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--primary-dark);
            overflow: hidden;
            margin-top: 0;
            padding-top: 80px;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 20, 66, 0.88) 0%, rgba(26, 35, 126, 0.72) 50%, rgba(13, 20, 66, 0.88) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            padding: var(--spacing-lg) var(--spacing-sm);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1.2rem;
            background: rgba(212, 168, 83, 0.18);
            border: 1px solid rgba(212, 168, 83, 0.3);
            border-radius: 100px;
            font-size: 0.85rem;
            color: var(--accent-light);
            margin-bottom: 1.5rem;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-inverse);
            letter-spacing: -0.03em;
            margin-bottom: 1.25rem;
        }
        .hero-title span {
            color: var(--accent);
        }
        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 2rem;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.9rem 2.2rem;
            border-radius: 100px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-inverse);
            background: var(--accent);
            box-shadow: 0 8px 32px rgba(212, 168, 83, 0.3);
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(212, 168, 83, 0.4);
            color: var(--text-inverse);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.9rem 2.2rem;
            border-radius: 100px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-inverse);
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
            color: var(--text-inverse);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem;
            justify-content: center;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-inverse);
            display: block;
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 0.25rem;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .hero-stat-item .num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .hero-stat-item .num {
                font-size: 1.3rem;
            }
        }
        /* ===== 通用板块标题 ===== */
        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }
        .section-header .label {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 1rem;
            background: rgba(26, 35, 126, 0.06);
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 0.75rem;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .section-header h2 {
                font-size: 1.7rem;
            }
        }
        /* ===== 登录方式卡片 ===== */
        .login-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .login-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .login-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent);
            opacity: 0;
            transition: var(--transition);
        }
        .login-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(212, 168, 83, 0.3);
        }
        .login-card:hover::before {
            opacity: 1;
        }
        .login-card .icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 1.25rem;
            background: rgba(26, 35, 126, 0.06);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .login-card:hover .icon {
            background: var(--primary);
            color: var(--text-inverse);
            transform: scale(1.05);
        }
        .login-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        .login-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 1.25rem;
        }
        .login-card .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            transition: var(--transition);
        }
        .login-card .btn-link:hover {
            color: var(--accent);
            gap: 0.7rem;
        }
        @media (max-width: 900px) {
            .login-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .login-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ===== 优势/数据区 ===== */
        .advantages {
            background: var(--bg-white);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
            text-align: center;
        }
        .advantage-item {
            padding: 2rem 1rem;
        }
        .advantage-item .num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
            line-height: 1.2;
        }
        .advantage-item .num span {
            color: var(--accent);
        }
        .advantage-item .label {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-top: 0.4rem;
        }
        @media (max-width: 768px) {
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-sm);
            }
            .advantage-item .num {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .advantages-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        /* ===== 最新资讯列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }
        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .news-card .card-img {
            height: 200px;
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }
        .news-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .news-card:hover .card-img img {
            transform: scale(1.05);
        }
        .news-card .card-img .tag {
            position: absolute;
            top: 1rem;
            left: 1rem;
            padding: 0.25rem 0.8rem;
            background: rgba(212, 168, 83, 0.9);
            backdrop-filter: blur(4px);
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-inverse);
        }
        .news-card .card-body {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 0.6rem;
        }
        .news-card .card-body .meta i {
            margin-right: 0.25rem;
        }
        .news-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .news-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }
        .news-card .card-body .read-more {
            margin-top: 1rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .news-card .card-body .read-more:hover {
            color: var(--accent);
            gap: 0.6rem;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 3rem 1rem;
            color: var(--text-muted);
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }
        .news-empty i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            display: block;
            color: var(--border-color);
        }
        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ===== 登录流程 ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(to right, var(--accent), var(--primary), var(--accent));
            opacity: 0.3;
            z-index: 0;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            background: var(--bg-light);
            padding: 1.5rem 1rem;
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .step-item:hover {
            background: var(--bg-white);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 1rem;
            background: var(--primary);
            color: var(--text-inverse);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            box-shadow: 0 4px 16px rgba(26, 35, 126, 0.2);
        }
        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.4rem;
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        @media (max-width: 768px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-sm);
            }
            .process-steps::before {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .process-steps {
                grid-template-columns: 1fr 1fr;
            }
        }
        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(26, 35, 126, 0.15);
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-item summary:hover {
            background: rgba(26, 35, 126, 0.02);
        }
        .faq-item .faq-answer {
            padding: 0 1.5rem 1.2rem;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            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: 0.12;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-sm);
        }
        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-inverse);
            margin-bottom: 0.75rem;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 2rem;
        }
        .cta-content .btn-primary {
            font-size: 1.05rem;
            padding: 1rem 2.8rem;
        }
        @media (max-width: 768px) {
            .cta-content h2 {
                font-size: 1.7rem;
            }
        }
        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: var(--spacing-lg) 0 var(--spacing-md);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-md);
            padding-bottom: var(--spacing-md);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-inverse);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.75rem;
        }
        .footer-brand .logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-inverse);
            margin-bottom: 1rem;
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .footer-col ul li a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: var(--spacing-sm);
            padding-top: var(--spacing-md);
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        /* ===== 通用工具 ===== */
        .text-center {
            text-align: center;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .gap-1 {
            gap: 1rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .bg-white {
            background: var(--bg-white);
        }
        .bg-light {
            background: var(--bg-light);
        }
        /* ===== 保证可访问性 ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: var(--max-width);
            padding-left: var(--spacing-sm);
            padding-right: var(--spacing-sm);
        }
        /* ===== 平滑滚动与动效 ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f2b4a;
            --primary-light: #1a4270;
            --primary-dark: #091c30;
            --accent: #d4a84b;
            --accent-light: #e8c87a;
            --accent-dark: #b8912e;
            --bg-light: #f7f9fc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text-dark: #1a2a3a;
            --text-body: #3d5166;
            --text-muted: #7a8fa3;
            --text-light: #ffffff;
            --border-light: #e6edf4;
            --border-accent: #d4a84b;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(15, 43, 74, 0.06);
            --shadow-md: 0 6px 24px rgba(15, 43, 74, 0.10);
            --shadow-lg: 0 16px 48px rgba(15, 43, 74, 0.14);
            --shadow-xl: 0 24px 64px rgba(15, 43, 74, 0.18);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== 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-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            padding-top: var(--header-h);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        /* ===== Foundation Overrides ===== */
        .grid-container {
            max-width: var(--max-width);
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        .grid-x {
            margin-left: -0.75rem;
            margin-right: -0.75rem;
        }
        .cell {
            padding-left: 0.75rem;
            padding-right: 0.75rem;
        }
        .button {
            font-family: var(--font-sans);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            border-radius: var(--radius-sm);
            font-weight: 600;
        }
        .button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Header / Navigation (悬浮胶囊) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px) saturate(1.4);
            -webkit-backdrop-filter: blur(16px) saturate(1.4);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition), background var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 43, 74, 0.08);
            background: rgba(255, 255, 255, 0.96);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .site-logo i {
            font-size: 1.5rem;
            color: var(--accent);
        }
        .site-logo:hover {
            color: var(--primary);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }
        .nav-list a {
            padding: 0.5rem 1.1rem;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            transition: background var(--transition), color var(--transition), transform var(--transition);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .nav-list a i {
            font-size: 0.9rem;
        }
        .nav-list a:hover,
        .nav-list a:focus-visible {
            background: rgba(15, 43, 74, 0.06);
            color: var(--primary);
            transform: translateY(-1px);
        }
        .nav-list a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(15, 43, 74, 0.2);
        }
        .nav-list a.active:hover {
            background: var(--primary-light);
            color: #fff;
        }
        .nav-list a.nav-cta {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(212, 168, 75, 0.35);
            padding: 0.5rem 1.4rem;
        }
        .nav-list a.nav-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(212, 168, 75, 0.4);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(15, 43, 74, 0.06);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 1.25rem 1.5rem 2rem;
                gap: 0.5rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 16px 40px rgba(15, 43, 74, 0.12);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                width: 100%;
                padding: 0.7rem 1.2rem;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .nav-list a.nav-cta {
                margin-top: 0.5rem;
                text-align: center;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }
        }
        @media (max-width: 520px) {
            :root {
                --header-h: 64px;
            }
            .site-logo {
                font-size: 1.15rem;
            }
            .site-logo i {
                font-size: 1.25rem;
            }
            .nav-list a {
                font-size: 0.95rem;
                padding: 0.6rem 1rem;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 5rem 0 4.5rem;
            background: var(--primary);
            background-image: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 80%, rgba(212, 168, 75, 0.10) 0%, transparent 60%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 0.75rem;
        }
        .page-hero h1 i {
            color: var(--accent);
            margin-right: 0.3rem;
        }
        .page-hero .hero-sub {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin: 0 auto 1.5rem;
            line-height: 1.6;
        }
        .page-hero .hero-breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 0.35rem;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
        }
        .page-hero .hero-breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }
        .page-hero .hero-breadcrumb a:hover {
            color: var(--accent);
        }
        .page-hero .hero-breadcrumb .sep {
            color: rgba(255, 255, 255, 0.3);
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 3.5rem 0 3rem;
                min-height: 200px;
            }
            .page-hero h1 {
                font-size: 1.9rem;
            }
            .page-hero .hero-sub {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .page-hero .hero-sub {
                font-size: 0.9rem;
            }
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 4.5rem 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-sm {
            padding: 2.5rem 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            text-align: center;
            margin-bottom: 0.5rem;
            letter-spacing: -0.3px;
        }
        .section-sub {
            text-align: center;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 2.5rem;
            font-size: 1.05rem;
        }
        @media (max-width: 768px) {
            .section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: 2.2rem 0;
            }
            .section-title {
                font-size: 1.35rem;
            }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--border-light);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .card-body {
            padding: 1.5rem 1.25rem 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .card-body p {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.6;
            flex: 1;
        }
        .card-body .card-tag {
            display: inline-block;
            background: rgba(212, 168, 75, 0.12);
            color: var(--accent-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.8rem;
            border-radius: 40px;
            margin-bottom: 0.6rem;
            align-self: flex-start;
            border: 1px solid rgba(212, 168, 75, 0.15);
        }
        .card-body .card-link {
            margin-top: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .card-body .card-link i {
            font-size: 0.8rem;
            transition: transform var(--transition);
        }
        .card-body .card-link:hover i {
            transform: translateX(3px);
        }
        @media (max-width: 520px) {
            .card-body {
                padding: 1.1rem 1rem 1rem;
            }
            .card-body h3 {
                font-size: 1.05rem;
            }
        }

        /* ===== Feature / Step Cards ===== */
        .step-card {
            text-align: center;
            padding: 2rem 1.5rem 1.8rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            height: 100%;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 1rem;
            box-shadow: 0 6px 20px rgba(15, 43, 74, 0.15);
        }
        .step-card .step-icon.accent {
            background: var(--accent);
            box-shadow: 0 6px 20px rgba(212, 168, 75, 0.25);
        }
        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 0.4rem;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .step-card .step-num {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--accent-dark);
            background: rgba(212, 168, 75, 0.12);
            padding: 0.1rem 0.7rem;
            border-radius: 40px;
            margin-bottom: 0.75rem;
            letter-spacing: 0.3px;
        }
        @media (max-width: 520px) {
            .step-card {
                padding: 1.5rem 1rem;
            }
            .step-card .step-icon {
                width: 52px;
                height: 52px;
                font-size: 1.3rem;
            }
        }

        /* ===== Method Tabs / Cards ===== */
        .method-card {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            height: 100%;
        }
        .method-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .method-card .method-icon {
            font-size: 2.4rem;
            color: var(--primary);
            margin-bottom: 0.75rem;
        }
        .method-card .method-icon.accent {
            color: var(--accent);
        }
        .method-card h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 0.3rem;
        }
        .method-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .method-card .method-badge {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            color: #fff;
            background: var(--accent);
            padding: 0.15rem 0.8rem;
            border-radius: 40px;
            margin-top: 0.5rem;
        }
        .method-card .method-badge.primary {
            background: var(--primary);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            list-style: none;
            transition: background var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            background: rgba(15, 43, 74, 0.02);
        }
        .faq-item summary::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 1.1rem;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-body);
            line-height: 1.7;
            font-size: 0.95rem;
            border-top: 1px solid var(--border-light);
            padding-top: 1rem;
        }
        .faq-item .faq-answer a {
            font-weight: 500;
        }
        @media (max-width: 520px) {
            .faq-item summary {
                padding: 1rem 1.1rem;
                font-size: 0.95rem;
            }
            .faq-item .faq-answer {
                padding: 0 1.1rem 1rem;
                font-size: 0.9rem;
            }
        }

        /* ===== Stats / Data Row ===== */
        .stat-item {
            text-align: center;
            padding: 1.5rem 0.5rem;
        }
        .stat-item .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.5px;
        }
        .stat-item .stat-number.accent {
            color: var(--accent);
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.2rem;
        }
        @media (max-width: 768px) {
            .stat-item .stat-number {
                font-size: 1.8rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            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;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 580px;
            margin: 0 auto 1.5rem;
            font-size: 1.05rem;
        }
        .cta-section .button.cta-btn {
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            padding: 0.9rem 2.4rem;
            font-size: 1.1rem;
            border-radius: 50px;
            box-shadow: 0 8px 28px rgba(212, 168, 75, 0.35);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .cta-section .button.cta-btn:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(212, 168, 75, 0.45);
        }
        .cta-section .button.cta-btn:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 3px;
        }
        @media (max-width: 768px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .button.cta-btn {
                padding: 0.75rem 1.8rem;
                font-size: 1rem;
            }
        }

        /* ===== Safety Tips ===== */
        .tip-item {
            display: flex;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border-left: 4px solid var(--accent);
            box-shadow: var(--shadow-sm);
            margin-bottom: 0.75rem;
            align-items: flex-start;
        }
        .tip-item .tip-icon {
            font-size: 1.3rem;
            color: var(--accent);
            flex-shrink: 0;
            margin-top: 0.1rem;
        }
        .tip-item .tip-content h5 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 0.15rem;
        }
        .tip-item .tip-content p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        @media (max-width: 520px) {
            .tip-item {
                padding: 1rem 1.1rem;
                flex-direction: column;
                gap: 0.4rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 3.5rem 0 0;
            font-size: 0.92rem;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .site-footer .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.75rem;
        }
        .site-footer .footer-brand .logo i {
            color: var(--accent);
        }
        .site-footer .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .site-footer .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 0.45rem;
        }
        .site-footer .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.5rem 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem 1.5rem;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
            .site-footer .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 2.5rem 0 0;
            }
        }

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent);
        }
        .text-primary {
            color: var(--primary);
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .text-center {
            text-align: center;
        }
        .rounded-full {
            border-radius: 50px;
        }

        /* ===== Responsive Grid Helpers ===== */
        @media (max-width: 640px) {
            .grid-x>.cell.shrink {
                flex: 0 0 auto;
                width: auto;
            }
        }

        /* ===== Smooth divider ===== */
        .section-divider {
            width: 60px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin: 0.75rem auto 1.5rem;
        }
        .section-divider.left {
            margin-left: 0;
        }

        /* ===== Back to top ===== */
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition), transform var(--transition), background var(--transition);
            z-index: 999;
            border: none;
            cursor: pointer;
        }
        .back-to-top.visible {
            opacity: 1;
            pointer-events: auto;
        }
        .back-to-top:hover {
            background: var(--accent);
            transform: translateY(-3px);
        }
        .back-to-top:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }
        @media (max-width: 520px) {
            .back-to-top {
                bottom: 1.25rem;
                right: 1.25rem;
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2240;
            --accent: #d4a843;
            --accent-light: #e8c46a;
            --accent-dark: #b8922e;
            --bg: #f8f7f4;
            --bg-card: #ffffff;
            --bg-dark: #1a2a3a;
            --text: #1e2a36;
            --text-light: #5a6a7a;
            --text-muted: #8a9aaa;
            --border: #e2dfd8;
            --border-light: #f0ede6;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.10);
            --transition: all 0.25s ease;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
            padding: 0;
        }

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

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

        /* ========== 导航 ========== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-radius: 60px;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 8px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.5);
            height: 60px;
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 0 12px;
            max-width: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.3px;
            padding: 6px 14px;
            border-radius: 40px;
            background: rgba(26, 58, 92, 0.04);
            transition: var(--transition);
        }
        .site-logo i {
            font-size: 22px;
            color: var(--accent);
        }
        .site-logo:hover {
            background: rgba(26, 58, 92, 0.08);
            color: var(--primary-dark);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-list a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .nav-list a i {
            font-size: 14px;
            opacity: 0.7;
        }
        .nav-list a:hover {
            background: rgba(26, 58, 92, 0.06);
            color: var(--primary);
        }
        .nav-list a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(26, 58, 92, 0.25);
        }
        .nav-list a.active i {
            opacity: 1;
        }
        .nav-list a.nav-cta {
            background: var(--accent);
            color: #1a1a1a;
            font-weight: 600;
            padding: 8px 22px;
            box-shadow: 0 4px 16px rgba(212, 168, 67, 0.35);
        }
        .nav-list a.nav-cta:hover {
            background: var(--accent-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(212, 168, 67, 0.40);
        }
        .nav-list a.nav-cta i {
            opacity: 1;
        }

        .nav-toggle {
            display: none;
            background: none;
            font-size: 24px;
            color: var(--text);
            cursor: pointer;
            padding: 8px 12px;
            border-radius: 40px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }
        .nav-toggle:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-dark);
            color: #c8d0d8;
            padding: 64px 0 32px;
            margin-top: 80px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand .logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #9aa8b8;
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #9aa8b8;
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #7a8a9a;
        }
        .footer-bottom a {
            color: #9aa8b8;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ========== 文章页通用 ========== */
        .page-article {
            padding-top: 100px;
        }

        /* 文章 Hero */
        .article-hero {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: flex-end;
            padding: 40px 48px;
            margin-bottom: 48px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .article-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .article-hero .hero-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }
        .article-hero .hero-meta .badge {
            background: var(--accent);
            color: #1a1a1a;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
        }
        .article-hero .hero-meta .date {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }
        .article-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin: 0 0 12px 0;
            letter-spacing: -0.5px;
        }
        .article-hero .hero-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.6;
            max-width: 640px;
        }

        /* 文章正文 */
        .article-body-wrap {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
            margin-bottom: 56px;
        }
        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px 48px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .article-main .content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-main .content p {
            margin-bottom: 20px;
        }
        .article-main .content h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 36px 0 16px;
            color: var(--primary-dark);
        }
        .article-main .content h3 {
            font-size: 19px;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--primary);
        }
        .article-main .content ul,
        .article-main .content ol {
            margin: 16px 0 20px;
            padding-left: 24px;
            list-style: disc;
        }
        .article-main .content ul li,
        .article-main .content ol li {
            margin-bottom: 8px;
        }
        .article-main .content blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(212, 168, 67, 0.06);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-main .content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-main .content a {
            color: var(--primary-light);
            border-bottom: 1px solid rgba(42, 90, 140, 0.2);
        }
        .article-main .content a:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }

        /* 文章侧边栏 */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .sidebar-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h4 i {
            color: var(--accent);
        }
        .sidebar-card ul li {
            margin-bottom: 12px;
        }
        .sidebar-card ul li a {
            font-size: 14px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .sidebar-card ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .sidebar-card ul li a i {
            font-size: 12px;
            color: var(--accent);
            opacity: 0.6;
        }

        /* 标签 */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(26, 58, 92, 0.06);
            color: var(--text-light);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        /* 相关文章 */
        .related-section {
            margin-bottom: 56px;
        }
        .related-section .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-section .section-title i {
            color: var(--accent);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .related-card .card-img {
            height: 180px;
            overflow: hidden;
            background: var(--bg);
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }
        .related-card:hover .card-img img {
            transform: scale(1.04);
        }
        .related-card .card-body {
            padding: 20px 22px 22px;
        }
        .related-card .card-body h5 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .meta {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* FAQ */
        .faq-section {
            margin-bottom: 56px;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px 48px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .faq-section .section-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .faq-section .section-title i {
            color: var(--accent);
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 18px 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: none;
            width: 100%;
            text-align: left;
            padding: 4px 0;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform 0.25s ease;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 0 0 0;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 12px 0 4px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            border-radius: var(--radius-lg);
            padding: 52px 48px;
            text-align: center;
            margin-bottom: 16px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 60px;
            font-size: 17px;
            font-weight: 600;
            background: var(--accent);
            color: #1a1a1a;
            transition: var(--transition);
            box-shadow: 0 8px 28px rgba(212, 168, 67, 0.35);
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(212, 168, 67, 0.45);
            color: #1a1a1a;
        }

        /* 错误状态 */
        .error-not-found {
            text-align: center;
            padding: 80px 24px;
            min-height: 50vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .error-not-found i {
            font-size: 56px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .error-not-found h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }
        .error-not-found p {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .error-not-found a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 60px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            transition: var(--transition);
        }
        .error-not-found a:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
            color: #fff;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .article-body-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .site-header {
                top: 12px;
                height: 54px;
                margin: 0 12px;
                border-radius: 40px;
            }
            .nav-list {
                display: none;
                position: fixed;
                top: 74px;
                left: 12px;
                right: 12px;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-radius: var(--radius);
                box-shadow: var(--shadow-lg);
                border: 1px solid var(--border-light);
                flex-direction: column;
                padding: 16px;
                gap: 8px;
                z-index: 999;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 18px;
                font-size: 16px;
            }
            .nav-list a.nav-cta {
                text-align: center;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }
            .site-logo {
                font-size: 17px;
                padding: 4px 12px;
            }
            .site-logo i {
                font-size: 18px;
            }

            .article-hero {
                min-height: 240px;
                padding: 28px 24px;
                border-radius: var(--radius);
            }
            .article-hero h1 {
                font-size: 24px;
            }
            .article-hero .hero-desc {
                font-size: 15px;
            }

            .article-main {
                padding: 24px 20px;
            }
            .article-main .content {
                font-size: 15px;
            }
            .article-main .content h2 {
                font-size: 20px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-card .card-img {
                height: 160px;
            }

            .faq-section {
                padding: 24px 20px;
            }
            .faq-section .section-title {
                font-size: 20px;
            }

            .cta-section {
                padding: 36px 24px;
                border-radius: var(--radius);
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .cta-section .btn-cta {
                padding: 12px 28px;
                font-size: 15px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .page-article {
                padding-top: 80px;
            }
            .article-hero h1 {
                font-size: 20px;
            }
            .article-hero .hero-desc {
                font-size: 14px;
            }
            .article-main {
                padding: 16px 14px;
            }
            .article-main .content {
                font-size: 14px;
            }
            .cta-section h2 {
                font-size: 19px;
            }
            .error-not-found i {
                font-size: 40px;
            }
            .error-not-found h2 {
                font-size: 22px;
            }
        }