/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fbbf24;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-soft: #1e293b;
            --text-primary: #0f172a;
            --text-body: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 0.375rem;
            --radius-md: 0.625rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg-body);
            padding-top: var(--header-height);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        .container-fluid {
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        /* ===== Bootstrap 覆盖 ===== */
        .btn {
            border-radius: var(--radius-md);
            font-weight: 600;
            padding: 0.625rem 1.5rem;
            transition: var(--transition);
            font-size: 0.9375rem;
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background-color: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
        }
        .btn-accent {
            background-color: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }
        .btn-accent:hover {
            background-color: var(--accent-dark);
            border-color: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }
        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(245, 158, 11, 0.25);
        }
        .btn-outline-primary {
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline-primary:hover {
            background-color: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-lg {
            padding: 0.875rem 2.25rem;
            font-size: 1.0625rem;
            border-radius: var(--radius-lg);
        }
        .btn-sm {
            padding: 0.4rem 1rem;
            font-size: 0.8125rem;
            border-radius: var(--radius-sm);
        }
        .card {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .card-body {
            padding: 1.5rem;
        }
        .badge {
            font-weight: 500;
            padding: 0.3em 0.7em;
            border-radius: var(--radius-sm);
            font-size: 0.75rem;
        }
        .badge-primary {
            background-color: var(--primary-bg);
            color: var(--primary);
        }
        .badge-accent {
            background-color: #fef3c7;
            color: var(--accent-dark);
        }
        .form-control {
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 0.625rem 1rem;
            transition: var(--transition);
            font-size: 0.9375rem;
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
        }
        .form-control::placeholder {
            color: var(--text-light);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }
        .header-logo i {
            font-size: 1.6rem;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 0.35rem;
            border-radius: var(--radius-sm);
        }
        .header-logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .header-logo:hover {
            color: var(--primary);
        }
        .header-center {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .header-center .nav-link {
            padding: 0.5rem 1rem;
            font-weight: 500;
            font-size: 0.9375rem;
            color: var(--text-body);
            border-radius: var(--radius-md);
            transition: var(--transition);
            position: relative;
        }
        .header-center .nav-link:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .header-center .nav-link.active {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .header-center .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .header-search {
            position: relative;
            width: 200px;
        }
        .header-search .form-control {
            padding-left: 2.25rem;
            font-size: 0.875rem;
            border-radius: 999px;
            background: var(--bg-body);
            border-color: transparent;
        }
        .header-search .form-control:focus {
            background: #fff;
            border-color: var(--primary);
        }
        .header-search .search-icon {
            position: absolute;
            left: 0.75rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-light);
            font-size: 0.875rem;
            pointer-events: none;
        }
        .header-btn {
            padding: 0.5rem 1.25rem;
            font-weight: 600;
            font-size: 0.875rem;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
            transition: var(--transition);
            white-space: nowrap;
        }
        .header-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
            color: #fff;
        }
        .header-btn i {
            margin-right: 0.35rem;
        }
        .navbar-toggler {
            display: none;
            border: none;
            padding: 0.5rem;
            color: var(--text-primary);
            font-size: 1.4rem;
            background: none;
        }
        .navbar-toggler:focus {
            outline: none;
            box-shadow: none;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 5rem 0 5.5rem;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #0f172a 100%);
            min-height: 580px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.2;
            z-index: 0;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 70%),
                radial-gradient(ellipse at 80% 50%, rgba(245, 158, 11, 0.08) 0%, transparent 70%);
            z-index: 1;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        .hero-content {
            max-width: 700px;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(37, 99, 235, 0.2);
            border: 1px solid rgba(37, 99, 235, 0.3);
            color: #93c5fd;
            padding: 0.35rem 1rem;
            border-radius: 999px;
            font-size: 0.8125rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(4px);
        }
        .hero-tag i {
            font-size: 0.7rem;
            color: var(--accent);
        }
        .hero-title {
            font-size: 3.25rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            margin-bottom: 1.25rem;
            letter-spacing: -0.02em;
        }
        .hero-title span {
            background: linear-gradient(135deg, #60a5fa, #a78bfa, #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.125rem;
            color: #cbd5e1;
            max-width: 560px;
            margin-bottom: 2rem;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }
        .hero-actions .btn-accent {
            padding: 0.875rem 2.5rem;
            font-size: 1.0625rem;
            border-radius: 999px;
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
        }
        .hero-actions .btn-accent:hover {
            box-shadow: 0 6px 28px rgba(245, 158, 11, 0.4);
        }
        .hero-actions .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.3);
            color: #e2e8f0;
            border-radius: 999px;
            padding: 0.875rem 2rem;
            font-size: 1rem;
        }
        .hero-actions .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
        }
        .hero-stats {
            display: flex;
            gap: 2.5rem;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 1.75rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat-number small {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--accent);
        }
        .hero-stat-label {
            font-size: 0.8125rem;
            color: #94a3b8;
            margin-top: 0.2rem;
        }

        /* ===== Section通用 ===== */
        .section-padding {
            padding: 4.5rem 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 1.0625rem;
            color: var(--text-muted);
            max-width: 580px;
            margin-bottom: 2.5rem;
            line-height: 1.7;
        }
        .section-header-center {
            text-align: center;
        }
        .section-header-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 特色/优势板块 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem 1.75rem;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            font-size: 1.4rem;
            margin-bottom: 1.25rem;
            color: #fff;
        }
        .feature-icon.blue {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        }
        .feature-icon.amber {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        }
        .feature-icon.teal {
            background: linear-gradient(135deg, #0ea5e9, #0284c7);
        }
        .feature-icon.green {
            background: linear-gradient(135deg, #10b981, #059669);
        }
        .feature-icon.purple {
            background: linear-gradient(135deg, #8b5cf6, #7c3aed);
        }
        .feature-icon.rose {
            background: linear-gradient(135deg, #f43f5e, #e11d48);
        }
        .feature-card h3 {
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .feature-card p {
            font-size: 0.9375rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            display: block;
            color: inherit;
        }
        .category-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            color: inherit;
            border-color: var(--primary-light);
        }
        .category-card .card-img-wrap {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .category-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .category-card .card-img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15, 23, 42, 0.6) 0%, transparent 60%);
        }
        .category-card .card-body {
            padding: 1.25rem 1.5rem 1.5rem;
        }
        .category-card .cat-tag {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background: var(--primary-bg);
            color: var(--primary);
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .category-card h3 {
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }
        .category-card p {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .category-card .card-arrow {
            position: absolute;
            right: 1.25rem;
            bottom: 1.5rem;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            opacity: 0;
            transform: translateX(-8px);
            transition: var(--transition);
        }
        .category-card:hover .card-arrow {
            opacity: 1;
            transform: translateX(0);
        }

        /* ===== 资讯列表 ===== */
        .news-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.25rem;
        }
        .news-item {
            display: flex;
            gap: 1.25rem;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 1.25rem;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            align-items: flex-start;
        }
        .news-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--primary-light);
        }
        .news-thumb {
            width: 100px;
            height: 76px;
            border-radius: var(--radius-md);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--border-color);
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-content .news-cat {
            display: inline-block;
            font-size: 0.6875rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            margin-bottom: 0.35rem;
        }
        .news-content h4 {
            font-size: 0.9375rem;
            font-weight: 600;
            margin-bottom: 0.3rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-content h4 a {
            color: var(--text-primary);
        }
        .news-content h4 a:hover {
            color: var(--primary);
        }
        .news-content .news-meta {
            font-size: 0.75rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .news-content .news-meta i {
            margin-right: 0.25rem;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 2.5rem 1rem;
            color: var(--text-muted);
            background: var(--bg-card);
            border: 1px dashed var(--border-color);
            border-radius: var(--radius-lg);
        }
        .news-empty i {
            font-size: 2rem;
            color: var(--border-color);
            margin-bottom: 0.75rem;
        }
        .news-empty p {
            margin-bottom: 0;
            font-size: 0.9375rem;
        }

        /* ===== 数据/流程 ===== */
        .steps-section {
            background: var(--bg-white);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: 1rem 0.5rem;
        }
        .step-item::after {
            content: '';
            position: absolute;
            right: -1rem;
            top: 2.5rem;
            width: 2rem;
            height: 2px;
            background: var(--border-color);
        }
        .step-item:last-child::after {
            display: none;
        }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 800;
            margin: 0 auto 1rem;
            background: var(--primary-bg);
            color: var(--primary);
            border: 2px solid var(--primary);
            transition: var(--transition);
            counter-increment: step;
        }
        .step-item:hover .step-number {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
            transform: scale(1.05);
        }
        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }
        .step-item p {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== 数据统计 ===== */
        .stats-bar {
            background: var(--bg-dark);
            padding: 3rem 0;
            position: relative;
            overflow: hidden;
        }
        .stats-bar::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            position: relative;
            z-index: 1;
        }
        .stat-item {
            text-align: center;
            padding: 1rem;
        }
        .stat-item .stat-icon {
            font-size: 1.75rem;
            color: var(--accent);
            margin-bottom: 0.5rem;
        }
        .stat-item .stat-number {
            font-size: 2.25rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 0.875rem;
            color: #94a3b8;
            margin-top: 0.25rem;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            background: var(--bg-card);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.125rem 1.5rem;
            font-weight: 600;
            font-size: 0.9375rem;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 1rem;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 0.75rem;
            color: var(--text-light);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 1.5rem 1.125rem;
            color: var(--text-muted);
            font-size: 0.90625rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-answer p:last-child {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 4rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .cta-desc {
            font-size: 1.0625rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .cta-actions .btn-light {
            background: #fff;
            color: var(--primary);
            border-radius: 999px;
            padding: 0.875rem 2.5rem;
            font-weight: 700;
            font-size: 1.0625rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .cta-actions .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
            background: #f8fafc;
        }
        .cta-actions .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            border-radius: 999px;
            padding: 0.875rem 2.5rem;
            font-weight: 600;
            font-size: 1.0625rem;
        }
        .cta-actions .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: #cbd5e1;
            padding: 3.5rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .footer-brand .footer-logo i {
            font-size: 1.3rem;
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.875rem;
            color: #94a3b8;
            max-width: 320px;
            line-height: 1.7;
            margin-bottom: 1rem;
        }
        .footer-social {
            display: flex;
            gap: 0.75rem;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94a3b8;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h5 {
            font-size: 0.9375rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul li a {
            color: #94a3b8;
            font-size: 0.875rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            padding: 1.25rem 0;
            text-align: center;
            font-size: 0.8125rem;
            color: #64748b;
        }
        .footer-bottom a {
            color: #94a3b8;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .step-item::after {
                display: none;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 2rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .hero-title {
                font-size: 2.5rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .site-header .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .header-center {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 1rem;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
            }
            .header-center.open {
                display: flex;
            }
            .header-center .nav-link {
                padding: 0.75rem 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .header-center .nav-link.active::after {
                display: none;
            }
            .header-center .nav-link.active {
                background: var(--primary-bg);
            }
            .navbar-toggler {
                display: block;
            }
            .header-search {
                width: 140px;
            }
            .header-btn span {
                display: none;
            }
            .header-btn i {
                margin-right: 0;
            }
            .header-btn {
                padding: 0.5rem 0.75rem;
            }

            .hero-section {
                padding: 3.5rem 0 4rem;
                min-height: auto;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.5rem;
                flex-wrap: wrap;
            }
            .hero-stat-number {
                font-size: 1.4rem;
            }

            .section-padding {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.625rem;
            }
            .section-subtitle {
                font-size: 0.9375rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .category-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .news-list {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .news-item {
                padding: 1rem;
            }
            .news-thumb {
                width: 80px;
                height: 64px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .stat-item .stat-number {
                font-size: 1.75rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .cta-title {
                font-size: 1.625rem;
            }
            .cta-desc {
                font-size: 0.9375rem;
            }
            .faq-question {
                padding: 1rem 1.25rem;
                font-size: 0.875rem;
            }
            .faq-answer {
                padding: 0 1.25rem 1rem;
                font-size: 0.875rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.625rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                text-align: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 1rem;
                align-items: flex-start;
            }
            .hero-stat-item {
                display: flex;
                align-items: center;
                gap: 0.75rem;
                text-align: left;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.75rem;
            }
            .header-search {
                width: 100px;
            }
            .section-title {
                font-size: 1.375rem;
            }
            .news-item {
                flex-direction: column;
            }
            .news-thumb {
                width: 100%;
                height: 120px;
            }
            .category-card .card-img-wrap {
                height: 140px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                text-align: center;
            }
        }

        /* ===== 工具类 ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .bg-soft-primary {
            background-color: var(--primary-bg);
        }
        .rounded-xl {
            border-radius: var(--radius-xl);
        }
        .shadow-hover {
            transition: var(--transition);
        }
        .shadow-hover:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .gap-1 {
            gap: 0.25rem;
        }
        .gap-2 {
            gap: 0.5rem;
        }
        .gap-3 {
            gap: 1rem;
        }
        .gap-4 {
            gap: 1.5rem;
        }
        .gap-5 {
            gap: 2rem;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-1 {
            margin-top: 0.25rem;
        }
        .mt-2 {
            margin-top: 0.5rem;
        }
        .mt-3 {
            margin-top: 1rem;
        }
        .mt-4 {
            margin-top: 1.5rem;
        }
        .mt-5 {
            margin-top: 2rem;
        }

/* roulang page: article */
:root {
    --primary: #2a6df4;
    --primary-dark: #1a4fa8;
    --primary-light: #e8f0fe;
    --secondary: #f5a623;
    --secondary-dark: #d4891a;
    --bg-body: #f8f9fc;
    --bg-white: #ffffff;
    --bg-card: #ffffff;
    --bg-dark: #1e2a3a;
    --text-dark: #1a2332;
    --text-body: #2d3748;
    --text-muted: #6b7a8f;
    --text-light: #a0aec0;
    --border-color: #e2e8f0;
    --border-light: #f0f2f5;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 6px 24px rgba(0,0,0,0.06);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
    --shadow-hover: 0 16px 48px rgba(42,109,244,0.12);
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-main); background: var(--bg-body); color: var(--text-body); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
ul, ol { list-style: none; padding: 0; margin: 0; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--spacing-lg) 0; }
.section-header { text-align: center; margin-bottom: var(--spacing-md); }
.section-header h2 { font-size: 2rem; font-weight: 700; color: var(--text-dark); margin-bottom: 0.5rem; letter-spacing: -0.5px; }
.section-header p { font-size: 1.05rem; color: var(--text-muted); max-width: 600px; margin: 0 auto; }
.section-header .subtitle { display: inline-block; background: var(--primary-light); color: var(--primary); padding: 0.2rem 1rem; border-radius: 100px; font-size: 0.85rem; font-weight: 600; margin-bottom: 0.75rem; letter-spacing: 0.3px; }
.site-header { background: var(--bg-white); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 1000; backdrop-filter: blur(12px); background: rgba(255,255,255,0.96); box-shadow: var(--shadow-sm); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 1rem; }
.header-left { display: flex; align-items: center; flex-shrink: 0; }
.header-logo { display: flex; align-items: center; gap: 0.5rem; font-size: 1.3rem; font-weight: 700; color: var(--text-dark); text-decoration: none; transition: var(--transition); }
.header-logo i { color: var(--primary); font-size: 1.5rem; }
.header-logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.header-logo:hover { opacity: 0.85; }
.header-center { display: flex; align-items: center; gap: 0.25rem; flex: 1; justify-content: center; }
.header-center .nav-link { padding: 0.5rem 1rem; font-size: 0.95rem; font-weight: 500; color: var(--text-body); border-radius: var(--radius-sm); transition: var(--transition); position: relative; white-space: nowrap; }
.header-center .nav-link:hover { color: var(--primary); background: var(--primary-light); }
.header-center .nav-link.active { color: var(--primary); font-weight: 600; }
.header-center .nav-link.active::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background: var(--primary); border-radius: 3px; }
.header-right { display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0; }
.header-search { position: relative; display: flex; align-items: center; }
.header-search .search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 0.9rem; pointer-events: none; }
.header-search .form-control { width: 200px; padding: 0.45rem 1rem 0.45rem 2.2rem; font-size: 0.9rem; border: 1px solid var(--border-color); border-radius: 100px; background: var(--bg-body); transition: var(--transition); }
.header-search .form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(42,109,244,0.12); background: var(--bg-white); }
.header-btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.45rem 1.25rem; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; border-radius: 100px; font-size: 0.9rem; font-weight: 600; border: none; transition: var(--transition); box-shadow: 0 4px 14px rgba(42,109,244,0.3); text-decoration: none; white-space: nowrap; }
.header-btn i { font-size: 0.85rem; }
.header-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(42,109,244,0.4); color: #fff; }
.navbar-toggler { display: none; background: none; border: none; font-size: 1.3rem; color: var(--text-dark); padding: 0.25rem 0.5rem; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition); }
.navbar-toggler:hover { background: var(--bg-body); }
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,0.85); padding: var(--spacing-lg) 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--spacing-md); margin-bottom: var(--spacing-md); }
.footer-brand .footer-logo { font-size: 1.4rem; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; }
.footer-brand .footer-logo i { color: var(--secondary); }
.footer-brand p { font-size: 0.92rem; line-height: 1.7; color: rgba(255,255,255,0.65); max-width: 360px; }
.footer-social { display: flex; gap: 0.75rem; margin-top: 1.25rem; }
.footer-social a { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: rgba(255,255,255,0.08); border-radius: 50%; color: rgba(255,255,255,0.7); font-size: 1.1rem; transition: var(--transition); }
.footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
.footer-col h5 { font-size: 1rem; font-weight: 600; color: #fff; margin-bottom: 1.25rem; position: relative; padding-bottom: 0.5rem; letter-spacing: 0.5px; }
.footer-col h5::after { content: ''; position: absolute; bottom: 0; left: 0; width: 28px; height: 3px; background: var(--secondary); border-radius: 3px; }
.footer-col ul li { margin-bottom: 0.55rem; }
.footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.9rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--secondary); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 1.25rem 0; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.4); }
.article-hero { position: relative; padding: 5rem 0 4rem; background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a3a 100%); overflow: hidden; }
.article-hero::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; opacity: 0.12; mix-blend-mode: overlay; }
.article-hero .container { position: relative; z-index: 2; }
.article-hero .breadcrumb { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-bottom: 1.5rem; flex-wrap: wrap; }
.article-hero .breadcrumb a { color: rgba(255,255,255,0.6); transition: var(--transition); }
.article-hero .breadcrumb a:hover { color: var(--secondary); }
.article-hero .breadcrumb .sep { color: rgba(255,255,255,0.3); }
.article-hero .breadcrumb .current { color: rgba(255,255,255,0.85); }
.article-hero .badge-category { display: inline-block; background: rgba(255,255,255,0.12); backdrop-filter: blur(4px); color: #fff; padding: 0.25rem 1rem; border-radius: 100px; font-size: 0.8rem; font-weight: 500; margin-bottom: 1rem; border: 1px solid rgba(255,255,255,0.1); }
.article-hero h1 { font-size: 2.4rem; font-weight: 800; color: #fff; line-height: 1.3; margin-bottom: 1rem; max-width: 800px; letter-spacing: -0.5px; }
.article-hero .meta { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.article-hero .meta span { display: flex; align-items: center; gap: 0.35rem; }
.article-hero .meta i { font-size: 0.8rem; }
.breadcrumb-section { background: var(--bg-white); border-bottom: 1px solid var(--border-color); padding: 0.75rem 0; }
.breadcrumb-section .container { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: var(--text-muted); }
.breadcrumb-section a { color: var(--text-muted); }
.breadcrumb-section a:hover { color: var(--primary); }
.breadcrumb-section .sep { color: var(--border-color); margin: 0 0.25rem; }
.breadcrumb-section .current { color: var(--text-body); font-weight: 500; }
.article-main { padding: var(--spacing-lg) 0; }
.article-card { background: var(--bg-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); overflow: hidden; padding: var(--spacing-md); }
.article-card .article-body { font-size: 1.05rem; line-height: 1.85; color: var(--text-body); }
.article-card .article-body h2, .article-card .article-body h3, .article-card .article-body h4 { color: var(--text-dark); font-weight: 700; margin-top: 2rem; margin-bottom: 0.75rem; }
.article-card .article-body h2 { font-size: 1.5rem; }
.article-card .article-body h3 { font-size: 1.25rem; }
.article-card .article-body p { margin-bottom: 1.25rem; }
.article-card .article-body ul, .article-card .article-body ol { margin-bottom: 1.25rem; padding-left: 1.5rem; list-style: disc; }
.article-card .article-body li { margin-bottom: 0.4rem; }
.article-card .article-body img { border-radius: var(--radius-md); margin: 1.5rem 0; }
.article-card .article-body blockquote { border-left: 4px solid var(--primary); background: var(--primary-light); padding: 1rem 1.5rem; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 1.5rem 0; color: var(--text-dark); }
.article-card .article-body a { color: var(--primary); text-decoration: underline; }
.article-meta-bar { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; padding: 1.25rem 0; border-top: 1px solid var(--border-color); margin-top: 1.5rem; }
.article-meta-bar .tag { display: inline-flex; align-items: center; gap: 0.3rem; background: var(--bg-body); color: var(--text-muted); padding: 0.25rem 0.75rem; border-radius: 100px; font-size: 0.8rem; border: 1px solid var(--border-color); transition: var(--transition); }
.article-meta-bar .tag i { font-size: 0.7rem; }
.article-meta-bar .tag:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }
.article-nav { display: flex; justify-content: space-between; gap: 1rem; padding: 1.5rem 0; border-top: 1px solid var(--border-color); margin-top: 1rem; flex-wrap: wrap; }
.article-nav a { display: flex; align-items: center; gap: 0.5rem; font-size: 0.95rem; color: var(--text-body); font-weight: 500; padding: 0.5rem 1rem; border-radius: var(--radius-sm); background: var(--bg-body); transition: var(--transition); }
.article-nav a:hover { background: var(--primary-light); color: var(--primary); }
.article-nav a.disabled { opacity: 0.3; pointer-events: none; }
.resource-section { background: var(--bg-white); padding: var(--spacing-lg) 0; }
.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); }
.resource-card { background: var(--bg-body); border-radius: var(--radius-md); overflow: hidden; transition: var(--transition); border: 1px solid var(--border-color); }
.resource-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: transparent; }
.resource-card .rc-img { height: 180px; background: var(--border-color); position: relative; overflow: hidden; }
.resource-card .rc-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.resource-card:hover .rc-img img { transform: scale(1.05); }
.resource-card .rc-body { padding: 1.25rem; }
.resource-card .rc-body h4 { font-size: 1.05rem; font-weight: 600; color: var(--text-dark); margin-bottom: 0.4rem; }
.resource-card .rc-body p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }
.resource-card .rc-body .rc-link { display: inline-flex; align-items: center; gap: 0.3rem; color: var(--primary); font-weight: 500; font-size: 0.9rem; margin-top: 0.75rem; }
.resource-card .rc-body .rc-link i { font-size: 0.75rem; transition: var(--transition); }
.resource-card .rc-body .rc-link:hover i { transform: translateX(3px); }
.faq-section { background: var(--bg-body); padding: var(--spacing-lg) 0; }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.75rem; }
.faq-item { background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); border: 1px solid var(--border-color); overflow: hidden; transition: var(--transition); }
.faq-item:hover { box-shadow: var(--shadow-md); }
.faq-item .faq-q { padding: 1rem 1.25rem; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600; color: var(--text-dark); font-size: 1rem; gap: 0.75rem; }
.faq-item .faq-q i { color: var(--primary); font-size: 0.8rem; transition: var(--transition); flex-shrink: 0; }
.faq-item .faq-q .q-icon { color: var(--primary); margin-right: 0.5rem; }
.faq-item .faq-a { padding: 0 1.25rem 1rem; color: var(--text-muted); font-size: 0.92rem; line-height: 1.7; display: none; }
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-item.open .faq-a { display: block; }
.cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); padding: var(--spacing-lg) 0; text-align: center; color: #fff; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: 0.08; mix-blend-mode: overlay; }
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 0.75rem; }
.cta-section p { font-size: 1.05rem; opacity: 0.9; max-width: 600px; margin: 0 auto 1.5rem; }
.cta-section .cta-btn { display: inline-flex; align-items: center; gap: 0.6rem; background: #fff; color: var(--primary); padding: 0.7rem 2rem; border-radius: 100px; font-size: 1rem; font-weight: 600; transition: var(--transition); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }
.cta-section .cta-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.2); color: var(--primary-dark); }
.not-found-box { text-align: center; padding: 3rem 1rem; }
.not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 1rem; display: block; }
.not-found-box h3 { font-size: 1.5rem; color: var(--text-dark); margin-bottom: 0.5rem; }
.not-found-box p { color: var(--text-muted); margin-bottom: 1.5rem; }
.not-found-box .btn-home { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.6rem 1.5rem; background: var(--primary); color: #fff; border-radius: 100px; font-weight: 500; transition: var(--transition); }
.not-found-box .btn-home:hover { background: var(--primary-dark); transform: translateY(-2px); color: #fff; }
@media (max-width: 992px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-sm); }
    .resource-grid { grid-template-columns: 1fr 1fr; }
    .article-hero h1 { font-size: 2rem; }
}
@media (max-width: 768px) {
    .header-center { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--bg-white); flex-direction: column; padding: 1rem; box-shadow: var(--shadow-lg); border-bottom: 1px solid var(--border-color); z-index: 999; gap: 0.25rem; }
    .header-center.open { display: flex; }
    .header-center .nav-link { width: 100%; padding: 0.6rem 1rem; }
    .header-center .nav-link.active::after { display: none; }
    .navbar-toggler { display: block; }
    .header-search { display: none; }
    .header-search.d-none.d-md-block { display: none !important; }
    .site-header .container { gap: 0.5rem; }
    .header-btn span { display: none; }
    .header-btn { padding: 0.45rem 0.9rem; }
    .section { padding: var(--spacing-md) 0; }
    .section-header h2 { font-size: 1.6rem; }
    .article-hero { padding: 3rem 0 2.5rem; }
    .article-hero h1 { font-size: 1.6rem; }
    .article-hero .meta { gap: 0.75rem; font-size: 0.8rem; }
    .resource-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .footer-brand p { max-width: 100%; }
    .article-card { padding: var(--spacing-sm); }
    .article-card .article-body { font-size: 0.98rem; }
    .cta-section h2 { font-size: 1.5rem; }
    .cta-section p { font-size: 0.95rem; }
    .faq-item .faq-q { font-size: 0.92rem; padding: 0.8rem 1rem; }
    .faq-item .faq-a { font-size: 0.88rem; padding: 0 1rem 0.8rem; }
}
@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .article-hero h1 { font-size: 1.3rem; }
    .article-hero .meta { flex-direction: column; gap: 0.4rem; align-items: flex-start; }
    .article-nav { flex-direction: column; }
    .article-nav a { width: 100%; justify-content: center; }
    .resource-card .rc-img { height: 140px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b6b4f;
            --primary-light: #128b6a;
            --primary-dark: #074d39;
            --primary-bg: #e8f5f0;
            --accent: #f5a623;
            --accent-light: #ffc85a;
            --accent-dark: #d48d1a;
            --body-bg: #f9fbfa;
            --card-bg: #ffffff;
            --text-main: #1a2a2e;
            --text-weak: #6b7f85;
            --text-white: #ffffff;
            --border-light: #e2ece8;
            --border-card: #d6e4df;
            --shadow-sm: 0 2px 8px rgba(11, 107, 79, 0.06);
            --shadow-md: 0 6px 24px rgba(11, 107, 79, 0.10);
            --shadow-lg: 0 12px 40px rgba(11, 107, 79, 0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1240px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--body-bg);
            padding-top: var(--header-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

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

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

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }
        .site-header:hover {
            box-shadow: var(--shadow-md);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }

        .header-left {
            flex-shrink: 0;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary-dark);
            text-decoration: none;
            letter-spacing: -0.3px;
            transition: opacity var(--transition);
        }
        .header-logo i {
            font-size: 1.7rem;
            color: var(--primary);
            transition: transform var(--transition);
        }
        .header-logo:hover i {
            transform: rotate(-8deg) scale(1.05);
        }
        .header-logo:hover {
            color: var(--primary-dark);
            opacity: 0.88;
        }

        .header-center {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 6px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-weak);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-link:hover {
            background: var(--primary-bg);
            color: var(--primary-dark);
        }
        .nav-link.active {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 2px 8px rgba(11, 107, 79, 0.25);
        }
        .nav-link.active:hover {
            background: var(--primary-light);
            color: var(--text-white);
        }

        .header-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-search {
            position: relative;
            width: 200px;
        }
        .header-search .search-icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-weak);
            font-size: 0.85rem;
            pointer-events: none;
        }
        .header-search .form-control {
            width: 100%;
            padding: 8px 14px 8px 38px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-xl);
            background: var(--body-bg);
            font-size: 0.88rem;
            color: var(--text-main);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .header-search .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(11, 107, 79, 0.12);
            background: var(--card-bg);
        }
        .header-search .form-control::placeholder {
            color: var(--text-weak);
            opacity: 0.7;
        }

        .header-btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 24px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: var(--text-white);
            border-radius: var(--radius-xl);
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            text-decoration: none;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
            box-shadow: 0 4px 12px rgba(11, 107, 79, 0.25);
            white-space: nowrap;
        }
        .header-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(11, 107, 79, 0.35);
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
            color: var(--text-white);
        }
        .header-btn:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(11, 107, 79, 0.2);
        }
        .header-btn i {
            font-size: 0.9rem;
        }

        .navbar-toggler {
            display: none;
            background: none;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            font-size: 1.3rem;
            color: var(--text-main);
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition);
        }
        .navbar-toggler:hover {
            background: var(--primary-bg);
            border-color: var(--primary);
        }

        /* ===== Hero / 分类 Banner ===== */
        .category-hero {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 40%, var(--primary-light) 100%);
            overflow: hidden;
            border-bottom: 4px solid var(--accent);
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
            pointer-events: none;
        }
        .category-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(11, 107, 79, 0.3) 0%, transparent 70%);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            padding: 60px 20px;
        }
        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .category-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.88);
            max-width: 700px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(6px);
            padding: 6px 20px;
            border-radius: var(--radius-xl);
            color: var(--text-white);
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .category-hero .hero-badge i {
            color: var(--accent);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-weak);
            max-width: 640px;
            margin: 0 auto 48px;
            text-align: center;
            line-height: 1.8;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-title {
            margin-bottom: 10px;
        }

        /* ===== 卡片通用 ===== */
        .card-custom {
            background: var(--card-bg);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            overflow: hidden;
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .card-custom .card-body {
            padding: 28px 24px 32px;
        }
        .card-custom .card-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 1.6rem;
            margin-bottom: 18px;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .card-custom:hover .card-icon {
            background: var(--primary);
            color: var(--text-white);
            transform: scale(1.05);
        }
        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .card-custom .card-text {
            font-size: 0.95rem;
            color: var(--text-weak);
            line-height: 1.7;
        }
        .card-custom .card-tag {
            display: inline-block;
            padding: 3px 12px;
            background: var(--primary-bg);
            color: var(--primary);
            border-radius: var(--radius-xl);
            font-size: 0.78rem;
            font-weight: 500;
            margin-bottom: 12px;
        }

        /* ===== 步骤流程 ===== */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step-counter;
        }
        .step-item {
            background: var(--card-bg);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 1.4rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .step-item:hover .step-number {
            background: var(--primary);
            color: var(--text-white);
            transform: scale(1.08);
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.92rem;
            color: var(--text-weak);
            line-height: 1.7;
            margin: 0;
        }
        .step-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary-light);
            opacity: 0.5;
        }

        /* ===== 文章 / 内容卡片列表 ===== */
        .article-card {
            display: flex;
            gap: 24px;
            background: var(--card-bg);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            margin-bottom: 24px;
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .article-card .article-img {
            flex: 0 0 240px;
            max-width: 240px;
            min-height: 160px;
            background: var(--primary-bg);
            overflow: hidden;
            position: relative;
        }
        .article-card .article-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .article-card:hover .article-img img {
            transform: scale(1.05);
        }
        .article-card .article-body {
            flex: 1;
            padding: 22px 24px 22px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .article-card .article-tag {
            display: inline-block;
            padding: 3px 14px;
            background: var(--primary-bg);
            color: var(--primary);
            border-radius: var(--radius-xl);
            font-size: 0.78rem;
            font-weight: 500;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .article-card .article-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            transition: color var(--transition);
        }
        .article-card:hover .article-title {
            color: var(--primary);
        }
        .article-card .article-excerpt {
            font-size: 0.92rem;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .article-card .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-weak);
        }
        .article-card .article-meta i {
            margin-right: 4px;
        }

        /* ===== 标签 ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: var(--card-bg);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-xl);
            font-size: 0.88rem;
            color: var(--text-weak);
            transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
            cursor: default;
        }
        .tag-item i {
            color: var(--primary-light);
            font-size: 0.85rem;
        }
        .tag-item:hover {
            background: var(--primary-bg);
            border-color: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            cursor: pointer;
            transition: background var(--transition), color var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            background: var(--primary-bg);
            color: var(--primary-dark);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-weak);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
            border-top: 4px solid var(--accent);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.88);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 44px;
            background: var(--accent);
            color: var(--primary-dark);
            border-radius: var(--radius-xl);
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            text-decoration: none;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.4);
        }
        .cta-btn:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 10px 32px rgba(245, 166, 35, 0.55);
            background: var(--accent-light);
            color: var(--primary-dark);
        }
        .cta-btn:active {
            transform: translateY(0) scale(0.98);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0d1f1a;
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
            border-top: 4px solid var(--primary-light);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-brand .footer-logo i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            transition: color var(--transition), padding-left var(--transition);
            display: inline-block;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            letter-spacing: 0.3px;
        }
        .footer-bottom p {
            margin: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .article-card .article-img {
                flex: 0 0 180px;
                max-width: 180px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .site-header .container {
                gap: 8px;
            }
            .header-center {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 20px;
                gap: 8px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                z-index: 1040;
            }
            .header-center.open {
                display: flex;
            }
            .header-center .nav-link {
                width: 100%;
                justify-content: center;
                padding: 10px 16px;
                font-size: 1rem;
            }
            .navbar-toggler {
                display: block;
            }

            .category-hero {
                min-height: 260px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 1rem;
            }

            .section {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }

            .step-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-arrow {
                display: none;
            }

            .article-card {
                flex-direction: column;
            }
            .article-card .article-img {
                flex: 0 0 200px;
                max-width: 100%;
                min-height: 180px;
            }
            .article-card .article-body {
                padding: 16px 20px 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }

            .header-search {
                width: 140px;
            }
            .header-btn span {
                display: none;
            }
            .header-btn {
                padding: 9px 16px;
            }
            .header-btn i {
                margin: 0;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero p {
                font-size: 0.92rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .card-custom .card-body {
                padding: 20px 18px 24px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-btn {
                padding: 14px 30px;
                font-size: 0.95rem;
            }
            .header-search {
                display: none !important;
            }
            .header-btn {
                padding: 8px 14px;
                font-size: 0.85rem;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 16px 16px;
                font-size: 0.88rem;
            }
        }

        /* ===== 工具类 ===== */
        .text-primary-custom {
            color: var(--primary);
        }
        .bg-primary-soft {
            background: var(--primary-bg);
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-2 {
            margin-top: 8px;
        }
        .mt-3 {
            margin-top: 16px;
        }
        .rounded-pill {
            border-radius: var(--radius-xl);
        }
        .fw-semibold {
            font-weight: 600;
        }

        /* 分割线 */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 0 auto 20px;
        }
        .divider-left {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 0 0 20px;
        }

        /* 图片占位装饰 */
        .img-decoration {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .img-decoration:hover {
            transform: scale(1.01);
            box-shadow: var(--shadow-lg);
        }

        /* 分类简介区 */
        .intro-block {
            display: flex;
            align-items: center;
            gap: 48px;
            background: var(--card-bg);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            box-shadow: var(--shadow-sm);
        }
        .intro-block .intro-icon {
            flex: 0 0 80px;
            width: 80px;
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-bg);
            border-radius: var(--radius-md);
            color: var(--primary);
            font-size: 2.2rem;
        }
        .intro-block .intro-text h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .intro-block .intro-text p {
            font-size: 0.95rem;
            color: var(--text-weak);
            margin: 0;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .intro-block {
                flex-direction: column;
                text-align: center;
                padding: 28px 24px;
                gap: 20px;
            }
            .intro-block .intro-icon {
                flex: 0 0 64px;
                width: 64px;
                height: 64px;
                font-size: 1.8rem;
            }
        }

        /* 小徽章列表 */
        .badge-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .badge-custom {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 18px;
            background: var(--primary-bg);
            color: var(--primary-dark);
            border-radius: var(--radius-xl);
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid transparent;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .badge-custom i {
            font-size: 0.8rem;
            color: var(--primary);
        }
        .badge-custom:hover {
            background: var(--card-bg);
            border-color: var(--primary-light);
            transform: translateY(-2px);
        }