/* roulang page: index */
:root {
            --color-primary: #1b3a5c;
            --color-primary-light: #2a5685;
            --color-primary-dark: #0f2640;
            --color-accent: #c8963e;
            --color-accent-light: #e0b86a;
            --color-accent-dark: #a67a2e;
            --color-bg: #f7f8fa;
            --color-bg-alt: #eef1f5;
            --color-white: #ffffff;
            --color-text: #1c1c1c;
            --color-text-secondary: #5a5f6b;
            --color-text-muted: #8b9099;
            --color-border: #dfe3e8;
            --color-border-light: #eceff3;
            --color-success: #2d8f5e;
            --color-danger: #c0392b;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-lg: 0 10px 32px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.06);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1240px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        button, .button {
            cursor: pointer;
            font-family: var(--font-sans);
            transition: all var(--transition-base);
            border: none;
        }
        button:focus-visible, .button:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 3px;
        }

        input, select, textarea {
            font-family: var(--font-sans);
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--color-primary-dark);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
        }

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

        /* ===== Header / 导航 ===== */
        .site-header {
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .nav-brand {
            flex-shrink: 0;
            padding: 0 36px;
            text-align: center;
        }
        .nav-brand a {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }
        .nav-brand a:hover {
            color: var(--color-primary-light);
        }
        .nav-brand .brand-icon {
            display: inline-block;
            width: 34px;
            height: 34px;
            background: var(--color-primary);
            border-radius: var(--radius-sm);
            vertical-align: middle;
            margin-right: 8px;
            position: relative;
        }
        .nav-brand .brand-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 16px;
            height: 16px;
            background: var(--color-white);
            border-radius: 3px;
        }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            padding: 8px 4px;
            position: relative;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transition: width var(--transition-base);
        }
        .nav-link:hover {
            color: var(--color-primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--color-primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
            background: var(--color-accent);
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-accent);
            color: var(--color-white);
            padding: 10px 20px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
            transition: all var(--transition-base);
            box-shadow: 0 2px 8px rgba(200,150,62,0.3);
        }
        .nav-cta-btn:hover {
            background: var(--color-accent-dark);
            color: var(--color-white);
            box-shadow: 0 4px 16px rgba(200,150,62,0.4);
            transform: translateY(-1px);
        }
        .nav-cta-btn:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(200,150,62,0.3);
        }

        /* 汉堡按钮 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--color-primary-dark);
            cursor: pointer;
            padding: 8px;
            line-height: 1;
            transition: color var(--transition-fast);
        }
        .hamburger-btn:hover {
            color: var(--color-accent);
        }

        /* 移动端菜单面板 */
        .mobile-menu-panel {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--color-white);
            z-index: 99;
            padding: 24px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
            border-top: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-lg);
        }
        .mobile-menu-panel.is-open {
            display: flex;
        }
        .mobile-menu-panel .nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 1.05rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .mobile-menu-panel .nav-link:hover {
            background: var(--color-bg);
        }
        .mobile-menu-panel .nav-cta-btn {
            display: block;
            text-align: center;
            margin-top: 8px;
            border-radius: var(--radius-md);
            padding: 14px 20px;
            font-size: 1rem;
        }

        @media (max-width: 1024px) {
            .nav-left, .nav-right {
                display: none;
            }
            .nav-brand {
                padding: 0;
                flex: 1;
                text-align: center;
            }
            .hamburger-btn {
                display: block;
                flex-shrink: 0;
            }
            .header-inner {
                justify-content: space-between;
            }
            .nav-brand {
                order: 2;
            }
            .hamburger-btn {
                order: 3;
            }
            .header-inner::before {
                content: '';
                order: 1;
                width: 44px;
                flex-shrink: 0;
            }
        }
        @media (max-width: 520px) {
            .nav-brand a {
                font-size: 1.05rem;
            }
            .nav-brand .brand-icon {
                width: 26px;
                height: 26px;
                margin-right: 4px;
            }
            .site-header {
                --header-height: 60px;
            }
            .header-inner {
                padding: 0 16px;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            background: var(--color-primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 580px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,38,64,0.88) 0%, rgba(27,58,92,0.78) 50%, rgba(15,38,64,0.85) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 0;
            color: var(--color-white);
        }
        .hero-badge {
            display: inline-block;
            background: rgba(200,150,62,0.2);
            border: 1px solid rgba(200,150,62,0.4);
            color: var(--color-accent-light);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
        }
        .hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-white);
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }
        .hero-title .highlight {
            color: var(--color-accent-light);
            position: relative;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.82);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 560px;
        }
        .hero-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            text-decoration: none;
            cursor: pointer;
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--color-accent);
            color: var(--color-white);
            border-color: var(--color-accent);
            box-shadow: 0 4px 16px rgba(200,150,62,0.35);
        }
        .btn-primary:hover {
            background: var(--color-accent-dark);
            border-color: var(--color-accent-dark);
            color: var(--color-white);
            box-shadow: 0 6px 22px rgba(200,150,62,0.45);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-white);
            border-color: rgba(255,255,255,0.55);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.8);
            color: var(--color-white);
            transform: translateY(-2px);
        }
        .btn:active {
            transform: translateY(0);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 44px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: left;
        }
        .hero-stat .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-accent-light);
            line-height: 1;
        }
        .hero-stat .stat-label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero-section {
                min-height: 460px;
            }
            .hero-content {
                padding: 50px 0;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .stat-number {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero-section {
                min-height: 400px;
            }
            .hero-title {
                font-size: 1.55rem;
            }
            .hero-desc {
                font-size: 0.9rem;
            }
            .hero-buttons {
                flex-direction: column;
                gap: 10px;
            }
            .btn {
                width: 100%;
                justify-content: center;
                padding: 13px 20px;
                font-size: 0.9rem;
            }
            .hero-stats {
                gap: 18px;
                margin-top: 28px;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--color-accent);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: 10px;
        }
        .section-header .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header .section-title {
                font-size: 1.55rem;
            }
        }

        /* ===== 核心亮点 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            text-align: center;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-border);
        }
        .feature-card .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--color-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.5rem;
            color: var(--color-primary);
            transition: all var(--transition-base);
        }
        .feature-card:hover .feature-icon {
            background: var(--color-primary);
            color: var(--color-white);
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-primary-dark);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            margin: 0;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .feature-card {
                padding: 24px 18px;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-base);
            background: var(--color-white);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            box-shadow: var(--shadow-xl);
            transform: translateY(-4px);
        }
        .category-card .card-img-wrap {
            position: relative;
            height: 220px;
            overflow: hidden;
        }
        .category-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .category-card:hover .card-img-wrap img {
            transform: scale(1.06);
        }
        .category-card .card-img-wrap::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, rgba(0,0,0,0.4), transparent);
            z-index: 2;
        }
        .category-card .card-body {
            padding: 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-primary-dark);
        }
        .category-card .card-body p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            margin-bottom: 14px;
            flex: 1;
        }
        .category-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-primary);
            transition: all var(--transition-fast);
        }
        .category-card .card-link:hover {
            color: var(--color-accent);
            gap: 10px;
        }
        .category-card .card-link i {
            transition: transform var(--transition-fast);
        }
        .category-card .card-link:hover i {
            transform: translateX(3px);
        }
        @media (max-width: 768px) {
            .category-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .category-card .card-img-wrap {
                height: 180px;
            }
        }

        /* ===== 最新信息列表 ===== */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }
        .news-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border);
            transform: translateY(-2px);
        }
        .news-card .news-thumb {
            flex-shrink: 0;
            width: 80px;
            height: 60px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--color-bg-alt);
        }
        .news-card .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-card .news-info {
            flex: 1;
            min-width: 0;
        }
        .news-card .news-info .news-category {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-accent);
            letter-spacing: 0.5px;
            margin-bottom: 4px;
        }
        .news-card .news-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .news-card .news-info h4 a {
            color: var(--color-primary-dark);
            transition: color var(--transition-fast);
        }
        .news-card .news-info h4 a:hover {
            color: var(--color-accent);
        }
        .news-card .news-info .news-date {
            font-size: 0.78rem;
            color: var(--color-text-muted);
        }
        .news-empty {
            text-align: center;
            padding: 40px;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            grid-column: 1 / -1;
            background: var(--color-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--color-border);
        }
        @media (max-width: 768px) {
            .news-list {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }
        @media (max-width: 520px) {
            .news-card {
                flex-direction: column;
                gap: 10px;
            }
            .news-card .news-thumb {
                width: 100%;
                height: 140px;
            }
        }

        /* ===== 流程步骤 ===== */
        .steps-row {
            display: flex;
            gap: 0;
            align-items: stretch;
            position: relative;
        }
        .step-item {
            flex: 1;
            text-align: center;
            padding: 28px 20px;
            position: relative;
            background: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            z-index: 1;
        }
        .step-item:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .step-item .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-white);
            font-weight: 800;
            font-size: 1.15rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            transition: all var(--transition-base);
        }
        .step-item:hover .step-number {
            background: var(--color-accent);
            transform: scale(1.1);
        }
        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-primary-dark);
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            margin: 0;
        }
        .step-connector {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            width: 48px;
            color: var(--color-border);
            font-size: 1.2rem;
        }
        @media (max-width: 768px) {
            .steps-row {
                flex-direction: column;
                gap: 16px;
            }
            .step-connector {
                width: 100%;
                height: 20px;
                transform: rotate(90deg);
            }
            .step-item {
                padding: 22px 18px;
            }
        }

        /* ===== 方案对比 ===== */
        .comparison-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            background: var(--color-white);
            border: 1px solid var(--color-border-light);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }
        .comparison-table th,
        .comparison-table td {
            padding: 16px 20px;
            text-align: center;
            border-bottom: 1px solid var(--color-border-light);
        }
        .comparison-table thead th {
            background: var(--color-primary);
            color: var(--color-white);
            font-weight: 700;
            font-size: 0.9rem;
            letter-spacing: 0.5px;
        }
        .comparison-table thead th:first-child {
            border-radius: var(--radius-lg) 0 0 0;
        }
        .comparison-table thead th:last-child {
            border-radius: 0 var(--radius-lg) 0 0;
        }
        .comparison-table tbody td {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
        }
        .comparison-table tbody tr:last-child td {
            border-bottom: none;
        }
        .comparison-table tbody tr:hover {
            background: var(--color-bg);
        }
        .comparison-table .check-icon {
            color: var(--color-success);
            font-weight: 700;
        }
        .comparison-table .dash-icon {
            color: var(--color-text-muted);
        }
        .comparison-table .highlight-col {
            background: rgba(200,150,62,0.04);
        }
        @media (max-width: 768px) {
            .comparison-table th,
            .comparison-table td {
                padding: 12px 14px;
                font-size: 0.8rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-primary-dark);
            user-select: none;
            transition: background var(--transition-fast);
        }
        .faq-question:hover {
            background: var(--color-bg);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-base);
            font-size: 0.8rem;
            color: var(--color-text-secondary);
        }
        .faq-item.is-open .faq-question .faq-icon {
            background: var(--color-accent);
            color: var(--color-white);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            padding: 0 24px;
        }
        .faq-item.is-open .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }
        .faq-answer p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 72px 0;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,38,64,0.9) 0%, rgba(27,58,92,0.85) 100%);
            z-index: 1;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-section .cta-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 12px;
        }
        .cta-section .cta-desc {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.78);
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-primary {
            font-size: 1rem;
            padding: 16px 36px;
        }
        @media (max-width: 520px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-section .cta-title {
                font-size: 1.5rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            color: var(--color-white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .footer-col p,
        .footer-col li {
            font-size: 0.88rem;
            line-height: 1.7;
            margin: 0;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 6px;
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.65);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.45);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: var(--max-width);
        }
        .foundation-override .button {
            border-radius: 50px;
            font-weight: 600;
        }

/* roulang page: category1 */
:root {
            --color-primary: #1a365d;
            --color-primary-light: #2c5282;
            --color-primary-dark: #0f2440;
            --color-accent: #c8943e;
            --color-accent-light: #d4a853;
            --color-accent-dark: #a87a2e;
            --color-bg: #f7f8fa;
            --color-bg-white: #ffffff;
            --color-bg-light: #edf2f7;
            --color-text: #1a202c;
            --color-text-secondary: #4a5568;
            --color-text-muted: #718096;
            --color-border: #e2e8f0;
            --color-border-light: #edf2f7;
            --color-success: #38a169;
            --color-warning: #d69e2e;
            --color-danger: #e53e3e;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 10px 32px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.05);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12), 0 6px 12px rgba(0,0,0,0.06);
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 68px;
        }

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

        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(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        button, .button {
            cursor: pointer;
            font-family: var(--font-sans);
        }
        button:focus-visible, .button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        input, select, textarea {
            font-family: var(--font-sans);
        }

        ul, ol {
            padding-left: 1.25rem;
        }

        h1, h2, h3, h4, h5, h6 {
            margin-top: 0;
            line-height: 1.35;
            color: var(--color-text);
            font-weight: 700;
        }
        h1 { font-size: 2.5rem; }
        h2 { font-size: 1.9rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }

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

        /* ===== HEADER ===== */
        .site-header {
            background: var(--color-bg-white);
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            position: relative;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-left { flex: 1; justify-content: flex-start; }
        .nav-right { flex: 1; justify-content: flex-end; }
        .nav-brand {
            flex-shrink: 0;
            padding: 0 20px;
            text-align: center;
        }
        .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-primary);
            white-space: nowrap;
            letter-spacing: 0.5px;
            text-decoration: none;
        }
        .nav-brand a:hover {
            color: var(--color-primary-light);
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            display: inline-block;
            flex-shrink: 0;
            position: relative;
        }
        .brand-icon::after {
            content: '✓';
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
        }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            text-decoration: none;
            display: inline-block;
        }
        .nav-link:hover {
            color: var(--color-primary);
            background: var(--color-bg-light);
        }
        .nav-link.active {
            color: var(--color-primary);
            font-weight: 600;
            background: var(--color-bg-light);
        }
        .nav-cta-btn {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: var(--color-accent);
            padding: 10px 20px;
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            white-space: nowrap;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            letter-spacing: 0.3px;
            box-shadow: 0 2px 8px rgba(200,148,62,0.25);
        }
        .nav-cta-btn:hover {
            background: var(--color-accent-light);
            color: #fff;
            box-shadow: 0 4px 16px rgba(200,148,62,0.35);
            transform: translateY(-1px);
        }
        .nav-cta-btn:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(200,148,62,0.2);
        }
        .hamburger-btn {
            display: none;
            background: none;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            font-size: 1.3rem;
            color: var(--color-text);
            cursor: pointer;
            transition: all var(--transition-fast);
            line-height: 1;
        }
        .hamburger-btn:hover {
            background: var(--color-bg-light);
            border-color: var(--color-text-muted);
        }

        /* Mobile menu */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: var(--color-bg-white);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-lg);
            z-index: 999;
            padding: 16px 24px;
            flex-direction: column;
            gap: 8px;
        }
        .mobile-menu.is-open {
            display: flex;
        }
        .mobile-menu .nav-link,
        .mobile-menu .nav-cta-btn {
            display: block;
            text-align: center;
            padding: 12px 16px;
            font-size: 1rem;
            width: 100%;
        }
        .mobile-menu .nav-cta-btn {
            margin-top: 4px;
        }

        /* ===== PAGE BANNER ===== */
        .page-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 80px 0;
            color: #fff;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,54,93,0.88) 0%, rgba(15,36,64,0.78) 50%, rgba(26,54,93,0.85) 100%);
            z-index: 1;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner .banner-badge {
            display: inline-block;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            color: #fff;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            border: 1px solid rgba(255,255,255,0.25);
        }
        .page-banner h1 {
            color: #fff;
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 1px;
            text-shadow: 0 2px 8px rgba(0,0,0,0.2);
        }
        .page-banner .banner-desc {
            color: rgba(255,255,255,0.9);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.6;
        }
        .banner-meta-row {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.85);
            font-size: 0.95rem;
        }
        .banner-meta-row span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .banner-meta-row i {
            color: var(--color-accent-light);
        }

        /* ===== SECTION COMMON ===== */
        .section {
            padding: 64px 0;
        }
        .section-alt {
            background: var(--color-bg-white);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2rem;
            color: var(--color-primary-dark);
            margin-bottom: 10px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 3px;
            background: var(--color-accent);
            margin: 12px auto 0;
            border-radius: 2px;
        }
        .section-header .section-subtitle {
            color: var(--color-text-muted);
            font-size: 1rem;
            max-width: 500px;
            margin: 8px auto 0;
        }

        /* ===== STEPS ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            position: relative;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            counter-increment: step-counter;
        }
        .step-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-accent);
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(26,54,93,0.25);
        }
        .step-card:nth-child(even) .step-number {
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
            box-shadow: 0 4px 14px rgba(200,148,62,0.25);
        }
        .step-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--color-primary-dark);
        }
        .step-card p {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            margin: 0;
            line-height: 1.6;
        }
        .step-connector {
            display: none;
        }

        /* ===== ARTICLE CARDS ===== */
        .article-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-border);
        }
        .article-card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .article-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-accent-dark);
            background: #fef9f0;
            padding: 4px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
            width: fit-content;
        }
        .article-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--color-primary-dark);
            line-height: 1.4;
        }
        .article-card-body p {
            color: var(--color-text-muted);
            font-size: 0.88rem;
            margin-bottom: 16px;
            flex: 1;
            line-height: 1.6;
        }
        .article-card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-primary-light);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
            text-decoration: none;
            margin-top: auto;
        }
        .article-card-link:hover {
            color: var(--color-primary);
            gap: 8px;
        }
        .article-card-link i {
            font-size: 0.8rem;
            transition: transform var(--transition-fast);
        }
        .article-card-link:hover i {
            transform: translateX(3px);
        }

        /* ===== CHECKLIST ===== */
        .checklist-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .checklist-item {
            background: var(--color-bg-white);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }
        .checklist-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border);
        }
        .checklist-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #e8f5e9;
            color: var(--color-success);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
        }
        .checklist-item:nth-child(odd) .checklist-icon {
            background: #e3f2fd;
            color: var(--color-primary-light);
        }
        .checklist-text h4 {
            font-size: 1rem;
            margin-bottom: 4px;
            color: var(--color-primary-dark);
        }
        .checklist-text p {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin: 0;
            line-height: 1.5;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary-dark);
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: all var(--transition-base);
            color: var(--color-text-muted);
        }
        .faq-item.is-open .faq-question .faq-icon {
            background: var(--color-accent);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.is-open .faq-answer {
            max-height: 400px;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            color: var(--color-text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* ===== CTA SECTION ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-dark) 100%);
            color: #fff;
            text-align: center;
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: rgba(255,255,255,0.03);
            pointer-events: none;
        }
        .cta-section .site-container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.85);
            font-size: 1.05rem;
            margin-bottom: 28px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-accent);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            padding: 14px 36px;
            border-radius: var(--radius-lg);
            text-decoration: none;
            transition: all var(--transition-base);
            box-shadow: 0 6px 24px rgba(200,148,62,0.35);
            letter-spacing: 0.5px;
        }
        .btn-cta-large:hover {
            background: var(--color-accent-light);
            color: #fff;
            box-shadow: 0 10px 32px rgba(200,148,62,0.45);
            transform: translateY(-2px);
        }
        .btn-cta-large:active {
            transform: translateY(0);
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255,255,255,0.8);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 16px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .footer-col p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom p {
            margin: 0;
        }

        /* ===== RESPONSIVE ===== */
        @media screen and (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .article-cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .checklist-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .section {
                padding: 48px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        @media screen and (max-width: 768px) {
            .nav-left, .nav-right {
                display: none;
            }
            .hamburger-btn {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .nav-brand {
                padding: 0;
                flex: 1;
                text-align: left;
            }
            .nav-brand a {
                font-size: 1.05rem;
            }
            .brand-icon {
                width: 30px;
                height: 30px;
            }
            .header-inner {
                justify-content: space-between;
                padding: 0 16px;
            }
            .page-banner {
                padding: 56px 0;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner .banner-desc {
                font-size: 0.95rem;
            }
            .banner-meta-row {
                gap: 16px;
                font-size: 0.85rem;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .article-cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .checklist-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .btn-cta-large {
                font-size: 1rem;
                padding: 12px 28px;
            }
            .section {
                padding: 36px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 16px 18px;
            }
            .faq-answer-inner {
                padding: 0 18px 16px;
                font-size: 0.88rem;
            }
        }
        @media screen and (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .page-banner .banner-desc {
                font-size: 0.88rem;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
            .step-card {
                padding: 20px 16px;
            }
            .step-number {
                width: 42px;
                height: 42px;
                font-size: 1.1rem;
            }
            .article-card-body {
                padding: 16px;
            }
            .checklist-item {
                padding: 16px;
            }
            .faq-question {
                font-size: 0.88rem;
            }
            .site-container {
                padding: 0 14px;
            }
        }

/* roulang page: article */
:root {
            --color-primary: #1a3a5c;
            --color-primary-light: #264f7a;
            --color-primary-dark: #0f2440;
            --color-accent: #c8963e;
            --color-accent-light: #e8b86d;
            --color-accent-dark: #a67a2e;
            --color-bg: #f5f3ef;
            --color-surface: #ffffff;
            --color-text: #2c2c2c;
            --color-text-weak: #6b7280;
            --color-text-muted: #9ca3af;
            --color-border: #e5e0da;
            --color-border-light: #f0ece6;
            --color-success: #2d8a56;
            --color-warning: #d97706;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(26, 58, 92, 0.06);
            --shadow-md: 0 4px 16px rgba(26, 58, 92, 0.08);
            --shadow-lg: 0 8px 32px rgba(26, 58, 92, 0.12);
            --shadow-xl: 0 16px 48px rgba(26, 58, 92, 0.16);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --max-width: 1240px;
            --header-height: 72px;
        }

        *,
        *::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-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 3px;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

        .site-container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

        @media (max-width: 768px) {
            .site-container {
                padding: 0 18px;
            }
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .header-inner {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .nav-left {
            gap: 6px;
        }

        .nav-right {
            gap: 10px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .nav-link:hover {
            color: var(--color-primary);
            background: rgba(26, 58, 92, 0.04);
        }

        .nav-link.active {
            color: var(--color-primary);
            background: rgba(26, 58, 92, 0.07);
            font-weight: 600;
        }

        .nav-brand {
            flex-shrink: 0;
        }

        .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 19px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.03em;
            white-space: nowrap;
            text-decoration: none;
        }

        .nav-brand a:hover {
            color: var(--color-primary-light);
        }

        .brand-icon {
            display: inline-block;
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            border-radius: var(--radius-sm);
            position: relative;
            flex-shrink: 0;
        }

        .brand-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 18px;
            height: 18px;
            background: var(--color-accent);
            border-radius: 3px;
            opacity: 0.85;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
            border-radius: 30px;
            white-space: nowrap;
            transition: all var(--transition-base);
            letter-spacing: 0.03em;
            box-shadow: 0 2px 8px rgba(200, 150, 62, 0.3);
            text-decoration: none;
        }

        .nav-cta-btn:hover {
            color: #fff;
            box-shadow: 0 4px 18px rgba(200, 150, 62, 0.45);
            transform: translateY(-1px);
        }

        .nav-cta-btn i {
            font-size: 12px;
            transition: transform var(--transition-fast);
        }

        .nav-cta-btn:hover i {
            transform: translateX(3px);
        }

        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--color-text);
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .hamburger-btn:hover {
            color: var(--color-primary);
            background: rgba(26, 58, 92, 0.05);
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--color-surface);
            z-index: 99;
            padding: 20px 18px 40px;
            overflow-y: auto;
            flex-direction: column;
            gap: 6px;
            box-shadow: var(--shadow-xl);
        }

        .mobile-nav-panel.open {
            display: flex;
        }

        .mobile-nav-panel .nav-link {
            padding: 14px 18px;
            font-size: 16px;
            border-radius: var(--radius-md);
            width: 100%;
            justify-content: flex-start;
        }

        .mobile-nav-panel .nav-cta-btn {
            margin-top: 16px;
            width: 100%;
            justify-content: center;
            padding: 14px 22px;
            font-size: 16px;
        }

        @media (max-width: 1024px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .hamburger-btn {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .header-inner {
                justify-content: space-between;
            }
            .nav-brand {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
        }

        @media (max-width: 520px) {
            .nav-brand a {
                font-size: 16px;
                gap: 6px;
            }
            .brand-icon {
                width: 28px;
                height: 28px;
            }
            .brand-icon::after {
                width: 14px;
                height: 14px;
            }
            .header-inner {
                padding: 0 14px;
            }
        }

        .site-main {
            flex: 1;
            padding: 40px 0 60px;
        }

        @media (max-width: 768px) {
            .site-main {
                padding: 24px 0 40px;
            }
        }

        .breadcrumb-bar {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: 14px 0;
            margin-bottom: 0;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--color-text-muted);
        }

        .breadcrumb-nav a {
            color: var(--color-text-weak);
            transition: color var(--transition-fast);
        }

        .breadcrumb-nav a:hover {
            color: var(--color-primary);
        }

        .breadcrumb-sep {
            color: var(--color-text-muted);
            font-size: 12px;
        }

        .breadcrumb-current {
            color: var(--color-text);
            font-weight: 500;
            pointer-events: none;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 40px;
            margin-top: 32px;
            align-items: start;
        }

        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        .article-main-col {
            min-width: 0;
        }

        .article-sidebar-col {
            position: sticky;
            top: calc(var(--header-height) + 32px);
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        @media (max-width: 1024px) {
            .article-sidebar-col {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 640px) {
            .article-sidebar-col {
                grid-template-columns: 1fr;
            }
        }

        .article-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
        }

        .article-card-header {
            padding: 32px 36px 0;
        }

        @media (max-width: 768px) {
            .article-card-header {
                padding: 22px 20px 0;
            }
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent-dark);
            background: rgba(200, 150, 62, 0.1);
            border-radius: 20px;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
        }

        .article-title {
            font-family: var(--font-heading);
            font-size: 28px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--color-primary-dark);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        @media (max-width: 768px) {
            .article-title {
                font-size: 22px;
                margin-bottom: 12px;
            }
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--color-text-weak);
            padding-bottom: 22px;
            border-bottom: 1px solid var(--color-border-light);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-meta i {
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .article-featured-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            border-bottom: 1px solid var(--color-border-light);
        }

        .article-body {
            padding: 32px 36px 40px;
        }

        @media (max-width: 768px) {
            .article-body {
                padding: 22px 20px 30px;
            }
        }

        .article-content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text);
        }

        .article-content h2 {
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin: 36px 0 16px;
            padding-left: 16px;
            border-left: 4px solid var(--color-accent);
            line-height: 1.4;
        }

        .article-content h3 {
            font-family: var(--font-heading);
            font-size: 18px;
            font-weight: 600;
            color: var(--color-primary);
            margin: 28px 0 12px;
            line-height: 1.4;
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-md);
        }

        .article-content blockquote {
            border-left: 4px solid var(--color-accent);
            background: rgba(200, 150, 62, 0.04);
            padding: 16px 20px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-weak);
            font-style: italic;
        }

        .article-content code {
            background: rgba(26, 58, 92, 0.05);
            padding: 2px 8px;
            border-radius: 3px;
            font-size: 0.9em;
            color: var(--color-primary-dark);
        }

        .article-content pre {
            background: var(--color-primary-dark);
            color: #e0e0e0;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 14px;
            line-height: 1.6;
        }

        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        .article-content a {
            color: var(--color-accent-dark);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--color-accent);
        }

        .article-content strong {
            color: var(--color-primary-dark);
            font-weight: 600;
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border-light);
        }

        .article-not-found .not-found-icon {
            font-size: 56px;
            color: var(--color-text-muted);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-family: var(--font-heading);
            font-size: 24px;
            color: var(--color-primary-dark);
            margin-bottom: 10px;
        }

        .article-not-found p {
            color: var(--color-text-weak);
            margin-bottom: 24px;
            font-size: 15px;
        }

        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: var(--color-primary);
            border-radius: 30px;
            transition: all var(--transition-base);
            text-decoration: none;
            box-shadow: var(--shadow-sm);
        }

        .btn-back:hover {
            background: var(--color-primary-light);
            box-shadow: var(--shadow-md);
            color: #fff;
            transform: translateY(-2px);
        }

        .sidebar-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            padding: 24px;
            overflow: hidden;
        }

        .sidebar-card h4 {
            font-family: var(--font-heading);
            font-size: 17px;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--color-accent);
            display: inline-block;
        }

        .sidebar-recommend-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .sidebar-recommend-list li {
            border-bottom: 1px solid var(--color-border-light);
        }

        .sidebar-recommend-list li:last-child {
            border-bottom: none;
        }

        .sidebar-recommend-list a {
            display: block;
            padding: 13px 4px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            transition: all var(--transition-fast);
            border-radius: var(--radius-sm);
            text-decoration: none;
            line-height: 1.5;
        }

        .sidebar-recommend-list a:hover {
            color: var(--color-primary);
            background: rgba(26, 58, 92, 0.03);
            padding-left: 8px;
        }

        .sidebar-recommend-list a i {
            color: var(--color-accent);
            margin-right: 6px;
            font-size: 11px;
            transition: transform var(--transition-fast);
        }

        .sidebar-recommend-list a:hover i {
            transform: translateX(2px);
        }

        .sidebar-cta-card {
            background: linear-gradient(145deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }

        .sidebar-cta-card h4 {
            font-family: var(--font-heading);
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
            border-bottom: none;
            padding-bottom: 0;
        }

        .sidebar-cta-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 18px;
            line-height: 1.6;
        }

        .sidebar-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 11px 24px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary-dark);
            background: var(--color-accent-light);
            border-radius: 30px;
            transition: all var(--transition-base);
            text-decoration: none;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }

        .sidebar-cta-btn:hover {
            background: #f0d08e;
            color: var(--color-primary-dark);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
            transform: translateY(-2px);
        }

        .related-section {
            margin-top: 48px;
        }

        .related-section h3 {
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: 24px;
            text-align: center;
            position: relative;
        }

        .related-section h3::after {
            content: '';
            display: block;
            width: 50px;
            height: 3px;
            background: var(--color-accent);
            margin: 10px auto 0;
            border-radius: 2px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }

        @media (max-width: 640px) {
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        .related-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }

        .related-card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }

        .related-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .related-card-category {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-accent-dark);
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }

        .related-card-title {
            font-family: var(--font-heading);
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary-dark);
            line-height: 1.45;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .related-card-title:hover {
            color: var(--color-accent-dark);
        }

        .related-card-date {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: auto;
        }

        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 48px 0 0;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .footer-col p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.7);
            margin: 0;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: all var(--transition-fast);
            text-decoration: none;
        }

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

        .footer-bottom {
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin: 0;
        }

        @media (max-width: 640px) {
            .site-footer {
                padding: 32px 0 0;
            }
            .footer-grid {
                gap: 20px;
                padding-bottom: 24px;
            }
            .footer-bottom {
                padding: 16px 0;
            }
        }

/* roulang page: category2 */
/* ============ 设计变量 ============ */
        :root {
            --color-primary: #1a56db;
            --color-primary-dark: #1347b8;
            --color-primary-light: #e8f0fe;
            --color-accent: #0d9488;
            --color-accent-light: #e6f7f5;
            --color-bg: #f8fafc;
            --color-bg-white: #ffffff;
            --color-bg-dark: #0f172a;
            --color-text: #1e293b;
            --color-text-secondary: #64748b;
            --color-text-light: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-danger: #ef4444;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 36px rgba(0,0,0,0.10);
            --shadow-xl: 0 20px 50px rgba(0,0,0,0.12);
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ============ 基础 Reset ============ */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }
        a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { 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(--color-text); }
        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }

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

        /* ============ Header / 导航 ============ */
        .site-header {
            background: var(--color-bg-white);
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled { box-shadow: var(--shadow-sm); }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100%;
            position: relative;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-left {
            position: absolute;
            left: 24px;
        }
        .nav-right {
            position: absolute;
            right: 24px;
        }
        .nav-brand {
            text-align: center;
        }
        .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-primary);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .brand-icon {
            display: inline-block;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border-radius: var(--radius-sm);
            position: relative;
            flex-shrink: 0;
        }
        .brand-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 14px;
            height: 14px;
            background: #fff;
            border-radius: 3px;
        }
        .nav-link {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-link:hover {
            color: var(--color-primary);
            background: var(--color-primary-light);
        }
        .nav-link.active {
            color: var(--color-primary);
            font-weight: 600;
            background: var(--color-primary-light);
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            transition: all var(--transition-base);
            white-space: nowrap;
            box-shadow: var(--shadow-sm);
        }
        .nav-cta-btn:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
        }
        .nav-cta-btn i {
            font-size: 0.85rem;
            transition: transform var(--transition-fast);
        }
        .nav-cta-btn:hover i { transform: translateX(3px); }
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--color-text);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            position: absolute;
            right: 24px;
            z-index: 1001;
        }
        .hamburger-btn:hover { color: var(--color-primary); background: var(--color-primary-light); }

        /* ============ 分类 Banner ============ */
        .category-banner {
            position: relative;
            background: linear-gradient(135deg, #0f1d3a 0%, #1a3a6b 40%, #1a56db 100%);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 80px 0 70px;
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.72);
            z-index: 1;
        }
        .category-banner .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .banner-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            color: #fff;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(8px);
            margin-bottom: 20px;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .category-banner h1 {
            font-size: 2.8rem;
            color: #ffffff;
            margin-bottom: 16px;
            font-weight: 800;
            letter-spacing: 0.03em;
        }
        .category-banner .banner-desc {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.85);
            line-height: 1.8;
            margin-bottom: 0;
        }
        .banner-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 36px;
            flex-wrap: wrap;
        }
        .banner-stat-item {
            text-align: center;
        }
        .banner-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #ffffff;
            display: block;
        }
        .banner-stat-label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            margin-top: 4px;
        }

        /* ============ 板块通用 ============ */
        .section-block {
            padding: 64px 0;
        }
        .section-block.bg-white { background: var(--color-bg-white); }
        .section-block.bg-light { background: var(--color-bg); }
        .section-block.bg-dark { background: var(--color-bg-dark); }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2rem;
            margin-bottom: 12px;
            color: var(--color-text);
        }
        .bg-dark .section-header h2 { color: #fff; }
        .section-header .section-subtitle {
            color: var(--color-text-secondary);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto;
        }
        .bg-dark .section-header .section-subtitle { color: rgba(255,255,255,0.7); }
        .section-divider {
            width: 50px;
            height: 4px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            border-radius: 2px;
            margin: 16px auto 0;
        }

        /* ============ 文章卡片网格 ============ */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .article-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-primary-light);
        }
        .article-card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--color-border-light);
        }
        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .article-card-image img { transform: scale(1.06); }
        .article-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            color: #fff;
            background: var(--color-primary);
            z-index: 1;
        }
        .article-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.5;
            color: var(--color-text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-body h3 a { color: inherit; }
        .article-card-body h3 a:hover { color: var(--color-primary); }
        .article-card-excerpt {
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 14px;
            border-top: 1px solid var(--color-border-light);
            font-size: 0.82rem;
            color: var(--color-text-light);
        }
        .article-card-meta i { margin-right: 4px; }
        .article-card-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-primary);
            transition: all var(--transition-fast);
        }
        .article-card-link:hover { gap: 8px; color: var(--color-primary-dark); }
        .article-card-link i { font-size: 0.75rem; }

        /* ============ 精选推荐 ============ */
        .featured-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .featured-item {
            display: flex;
            gap: 20px;
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            align-items: center;
        }
        .featured-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-primary-light);
            transform: translateY(-3px);
        }
        .featured-item-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            flex-shrink: 0;
        }
        .featured-item-icon.blue { background: var(--color-primary-light); color: var(--color-primary); }
        .featured-item-icon.green { background: var(--color-accent-light); color: var(--color-accent); }
        .featured-item-icon.amber { background: #fef3c7; color: var(--color-warning); }
        .featured-item-icon.red { background: #fee2e2; color: var(--color-danger); }
        .featured-item-content h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .featured-item-content p {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* ============ 小贴士板块 ============ */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .tip-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
        }
        .tip-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .tip-card-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
            background: var(--color-primary-light);
            color: var(--color-primary);
        }
        .tip-card h4 {
            font-size: 1rem;
            margin-bottom: 8px;
        }
        .tip-card p {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* ============ FAQ ============ */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            background: var(--color-bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover { border-color: var(--color-primary-light); }
        .faq-question {
            padding: 18px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            user-select: none;
            transition: background var(--transition-fast);
        }
        .faq-question:hover { background: var(--color-bg); }
        .faq-question i { transition: transform var(--transition-base); color: var(--color-text-light); font-size: 0.85rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--color-primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base) ease, padding var(--transition-base) ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }
        .faq-answer p {
            color: var(--color-text-secondary);
            font-size: 0.93rem;
            line-height: 1.8;
        }

        /* ============ CTA ============ */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            padding: 60px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255,255,255,0.05);
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
        }
        .cta-section .cta-content { position: relative; z-index: 1; }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.85);
            font-size: 1.05rem;
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-btn-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-primary);
            background: #ffffff;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-lg);
        }
        .cta-btn-large:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-xl);
            color: var(--color-primary-dark);
        }
        .cta-btn-large i { transition: transform var(--transition-fast); }
        .cta-btn-large:hover i { transform: translateX(4px); }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 48px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-col h4 {
            color: #fff;
            margin-bottom: 16px;
            font-size: 1.05rem;
        }
        .footer-col p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: rgba(255,255,255,0.65);
        }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover { color: #fff; }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.45);
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            .articles-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .tips-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .featured-list { grid-template-columns: 1fr; gap: 16px; }
            .banner-stats { gap: 32px; }
            .category-banner h1 { font-size: 2.2rem; }
            .nav-left { gap: 2px; }
            .nav-right { gap: 4px; }
            .nav-link { padding: 8px 10px; font-size: 0.88rem; }
        }

        @media (max-width: 768px) {
            :root { --header-height: 60px; }
            .header-inner { justify-content: space-between; padding: 0 16px; }
            .nav-left, .nav-right {
                position: static;
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--color-bg-white);
                padding: 16px 0;
                gap: 4px;
            }
            .nav-left.mobile-open, .nav-right.mobile-open {
                display: flex;
            }
            .mobile-nav-wrapper {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-bg-white);
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-md);
                z-index: 999;
                flex-direction: column;
                padding: 12px 0;
            }
            .mobile-nav-wrapper.mobile-open { display: flex; }
            .nav-brand { margin: 0 auto 0 0; }
            .nav-brand a { font-size: 1.05rem; }
            .brand-icon { width: 30px; height: 30px; }
            .hamburger-btn { display: block; position: static; }
            .nav-link, .nav-cta-btn { width: 100%; text-align: center; justify-content: center; border-radius: 0; padding: 12px 16px; }
            .nav-link.active { background: var(--color-primary-light); }

            .category-banner { padding: 50px 0 44px; }
            .category-banner h1 { font-size: 1.8rem; }
            .category-banner .banner-desc { font-size: 1rem; }
            .banner-stats { gap: 24px; }
            .banner-stat-num { font-size: 1.5rem; }
            .articles-grid { grid-template-columns: 1fr; gap: 16px; }
            .tips-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .featured-item { flex-direction: column; text-align: center; align-items: center; padding: 20px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .section-block { padding: 44px 0; }
            .section-header h2 { font-size: 1.6rem; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section { padding: 44px 0; }
        }

        @media (max-width: 520px) {
            .site-container { padding: 0 14px; }
            .category-banner { padding: 38px 0 32px; }
            .category-banner h1 { font-size: 1.5rem; }
            .tips-grid { grid-template-columns: 1fr; }
            .banner-stats { gap: 16px; flex-direction: column; }
            .article-card-body { padding: 16px; }
            .article-card-body h3 { font-size: 1rem; }
            .faq-question { padding: 14px 16px; font-size: 0.93rem; }
            .faq-item.open .faq-answer { padding: 0 16px 14px; }
            .cta-btn-large { padding: 12px 28px; font-size: 0.95rem; }
            .section-header { margin-bottom: 32px; }
            .section-header h2 { font-size: 1.4rem; }
        }

        /* ============ 辅助工具类 ============ */
        .text-center { text-align: center; }
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }