/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a4a;
            --secondary: #c9a84c;
            --secondary-light: #e0c06a;
            --secondary-dark: #a88830;
            --accent: #e8a838;
            --bg-light: #f7f8fc;
            --bg-white: #ffffff;
            --bg-dark: #0f1a3a;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #8a8aaa;
            --text-white: #ffffff;
            --border-color: #e2e6f0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(26, 42, 108, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 42, 108, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 42, 108, 0.14);
            --shadow-glow: 0 0 30px rgba(201, 168, 76, 0.20);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        p {
            margin-bottom: 0.5rem;
            color: var(--text-secondary);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .container-wide {
            max-width: 1320px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            padding: 0 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.01em;
        }
        .site-logo i {
            color: var(--secondary);
            font-size: 1.8rem;
        }
        .site-logo:hover {
            color: var(--primary-dark);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.05);
        }
        .nav-list a.active {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.08);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .nav-cta {
            background: var(--primary) !important;
            color: var(--text-white) !important;
            border-radius: var(--radius-sm) !important;
            padding: 8px 24px !important;
            box-shadow: var(--shadow-sm);
        }
        .nav-cta:hover {
            background: var(--primary-light) !important;
            color: var(--text-white) !important;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px;
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
                z-index: 1060;
            }
            .nav-list {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: var(--bg-white);
                flex-direction: column;
                padding: 100px 24px 40px;
                gap: 12px;
                box-shadow: -8px 0 40px rgba(0, 0, 0, 0.12);
                transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 1055;
                overflow-y: auto;
            }
            .nav-list.open {
                right: 0;
            }
            .nav-list a {
                width: 100%;
                padding: 14px 20px;
                font-size: 1.05rem;
            }
            .nav-list a.active::after {
                bottom: 4px;
            }
            .nav-overlay {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(0, 0, 0, 0.35);
                z-index: 1054;
                opacity: 0;
                pointer-events: none;
                transition: opacity 0.4s;
            }
            .nav-overlay.show {
                opacity: 1;
                pointer-events: auto;
            }
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 20px 80px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
            margin-top: 0;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(201, 168, 76, 0.10) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(255, 255, 255, 0.04) 0%, transparent 50%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            margin: 0 auto;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 20px;
            border-radius: 60px;
            font-size: 0.85rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
            letter-spacing: 0.3px;
        }
        .hero-badge i {
            color: var(--secondary);
        }
        .hero h1 {
            font-size: 3.6rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition);
        }
        .btn-hero-primary:hover {
            background: var(--secondary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(201, 168, 76, 0.35);
        }
        .btn-hero-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            border: 2px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition);
        }
        .btn-hero-secondary:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.45);
            color: var(--text-white);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.10);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
        }
        .hero-stat-item .num span {
            color: var(--secondary);
        }
        .hero-stat-item .label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-sub {
            color: var(--text-white);
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 52px;
        }
        .section-header h2 {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .section-header .section-sub {
            font-size: 1.05rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        .section-header .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(26, 42, 108, 0.06);
            padding: 4px 18px;
            border-radius: 60px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .section-header .section-badge i {
            color: var(--secondary);
        }

        /* ===== 卡片通用 ===== */
        .card-custom {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .card-custom .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 18px;
            color: var(--primary);
            background: rgba(26, 42, 108, 0.06);
            transition: all var(--transition);
        }
        .card-custom:hover .icon-wrap {
            background: var(--primary);
            color: var(--text-white);
        }
        .card-custom h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .card-custom p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .card-custom .card-tag {
            display: inline-block;
            padding: 2px 14px;
            border-radius: 60px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(201, 168, 76, 0.12);
            color: var(--secondary-dark);
            margin-top: 14px;
        }

        /* ===== 特色网格 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 封面卡片 (分类入口) ===== */
        .cover-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .cover-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .cover-card .cover-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .cover-card:hover .cover-img {
            transform: scale(1.04);
        }
        .cover-card .cover-body {
            padding: 24px 22px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .cover-card .cover-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .cover-card .cover-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
        }
        .cover-card .cover-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            margin-top: 14px;
            transition: gap var(--transition);
        }
        .cover-card .cover-link i {
            font-size: 0.8rem;
            transition: transform var(--transition);
        }
        .cover-card:hover .cover-link i {
            transform: translateX(4px);
        }

        /* ===== 资讯列表 ===== */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        @media (max-width: 768px) {
            .news-list {
                grid-template-columns: 1fr;
            }
        }
        .news-item {
            display: flex;
            gap: 20px;
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            padding: 20px 22px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .news-item:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
            transform: translateY(-2px);
        }
        .news-item .news-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(26, 42, 108, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.1rem;
        }
        .news-item .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-item .news-content h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .news-item .news-content h4 a {
            color: var(--text-primary);
        }
        .news-item .news-content h4 a:hover {
            color: var(--primary);
        }
        .news-item .news-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 6px;
        }
        .news-item .news-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .news-item .news-meta .cat {
            background: rgba(201, 168, 76, 0.10);
            color: var(--secondary-dark);
            padding: 0 10px;
            border-radius: 60px;
            font-weight: 500;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--text-light);
            font-size: 1rem;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }

        /* ===== 数据/流程板块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }
        .stat-card {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(201, 168, 76, 0.20);
        }
        .stat-card .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.2;
        }
        .stat-card .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }
        .stat-card .stat-icon {
            font-size: 1.8rem;
            color: rgba(201, 168, 76, 0.3);
            margin-bottom: 12px;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            position: relative;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: 0 12px;
        }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            margin: 0 auto 18px;
            box-shadow: 0 4px 16px rgba(26, 42, 108, 0.20);
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            background: rgba(26, 42, 108, 0.02);
        }
        .faq-question i {
            color: var(--secondary);
            transition: transform var(--transition);
            flex-shrink: 0;
            font-size: 0.9rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-answer p {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 80px 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            padding: 16px 44px;
            border-radius: var(--radius-sm);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition);
        }
        .btn-cta:hover {
            background: var(--secondary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 40px rgba(201, 168, 76, 0.35);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 20px 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        .footer-brand .site-logo {
            color: var(--text-white);
            margin-bottom: 12px;
            font-size: 1.4rem;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            padding: 4px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary-dark);
        }

        /* ===== 按钮通用 ===== */
        .btn-outline-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border: 2px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: all var(--transition);
        }
        .btn-outline-primary-custom:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-1px);
        }
        .btn-solid-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: var(--text-white);
            font-weight: 700;
            border-radius: var(--radius-sm);
            border: none;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .btn-solid-primary:hover {
            background: var(--primary-light);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-solid-primary i {
            font-size: 0.9rem;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1200px) {
            .hero h1 {
                font-size: 3rem;
            }
            .section-header h2 {
                font-size: 2rem;
            }
        }
        @media (max-width: 992px) {
            .hero {
                min-height: 80vh;
                padding: 100px 20px 60px;
            }
            .hero h1 {
                font-size: 2.6rem;
            }
            .hero p {
                font-size: 1.05rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat-item .num {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 70vh;
                padding: 90px 16px 50px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
                margin-top: 36px;
                padding-top: 28px;
            }
            .section {
                padding: 60px 0;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .stat-card .stat-num {
                font-size: 2rem;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                gap: 24px;
            }
            .news-item {
                flex-direction: column;
                gap: 12px;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .card-custom {
                padding: 24px 20px;
            }
            .cover-card .cover-img {
                height: 170px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.88rem;
            }
            .btn-hero-primary,
            .btn-hero-secondary {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 辅助 ===== */
        .text-gold {
            color: var(--secondary);
        }
        .bg-gold-soft {
            background: rgba(201, 168, 76, 0.06);
        }
        .gap-xy {
            gap: 20px;
        }
        .mt-section {
            margin-top: 90px;
        }
        @media (max-width: 768px) {
            .mt-section {
                margin-top: 60px;
            }
        }
        .img-round {
            border-radius: var(--radius-md);
        }
        .shadow-soft {
            box-shadow: var(--shadow-sm);
        }

        /* 防止导航遮挡 */
        .anchor-offset {
            scroll-margin-top: 90px;
        }

        /* 按钮焦点 */
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }

        /* 动画 */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-body: #ffffff;
            --bg-section: #f8fafc;
            --bg-dark: #0f172a;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --text-muted: #94a3b8;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 20px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.08);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding: 0 20px;
            margin: 0 auto;
        }

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

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(0,0,0,0.04);
            transition: background var(--transition), box-shadow var(--transition);
            height: 72px;
        }

        .site-header .header-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.3px;
            transition: opacity var(--transition);
        }
        .site-logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .site-logo:hover {
            color: var(--secondary);
            opacity: 0.85;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: background var(--transition), color var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav-list a.active {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-list a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 22px;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .nav-list a.nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
        }
        .nav-list a.nav-cta i {
            margin-right: 6px;
            font-size: 0.85rem;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--secondary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-xs);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-section);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.35);
            z-index: 1040;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .nav-overlay.show {
            opacity: 1;
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
                z-index: 1060;
            }
            .nav-list {
                position: fixed;
                top: 0;
                right: -280px;
                width: 280px;
                height: 100vh;
                background: var(--bg-body);
                flex-direction: column;
                align-items: flex-start;
                padding: 90px 24px 40px;
                gap: 6px;
                box-shadow: -8px 0 40px rgba(0,0,0,0.08);
                transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 1055;
                border-left: 1px solid var(--border);
            }
            .nav-list.open {
                right: 0;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1.05rem;
                border-radius: var(--radius-xs);
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list a.active {
                background: var(--primary-bg);
                color: var(--primary);
                border-left: 3px solid var(--primary);
            }
            .nav-list a.nav-cta {
                margin-top: 12px;
                text-align: center;
                border-radius: 50px;
            }
            .nav-overlay.show {
                display: block;
            }
        }

        /* Article Banner */
        .article-banner {
            padding: 140px 0 60px;
            background: linear-gradient(135deg, var(--bg-section) 0%, var(--primary-bg) 100%);
            position: relative;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(37,99,235,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-banner .breadcrumb-custom {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }
        .article-banner .breadcrumb-custom a {
            color: var(--primary);
            font-weight: 500;
        }
        .article-banner .breadcrumb-custom a:hover {
            text-decoration: underline;
        }
        .article-banner .breadcrumb-custom .sep {
            color: var(--text-muted);
            margin: 0 4px;
        }
        .article-banner .breadcrumb-custom .current {
            color: var(--text-light);
        }

        .article-banner .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            margin-bottom: 16px;
            align-items: center;
        }
        .article-banner .article-meta .badge-cat {
            display: inline-block;
            padding: 4px 16px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .article-banner .article-meta .meta-item {
            font-size: 0.9rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-banner .article-meta .meta-item i {
            color: var(--primary);
            font-size: 0.85rem;
        }

        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--secondary);
            margin-bottom: 18px;
            letter-spacing: -0.5px;
            max-width: 900px;
        }
        .article-banner .lead-desc {
            font-size: 1.15rem;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 760px;
        }

        @media (max-width: 768px) {
            .article-banner {
                padding: 120px 0 40px;
            }
            .article-banner h1 {
                font-size: 1.8rem;
            }
            .article-banner .lead-desc {
                font-size: 1rem;
            }
            .article-banner .article-meta {
                gap: 10px 16px;
            }
        }
        @media (max-width: 520px) {
            .article-banner h1 {
                font-size: 1.5rem;
            }
        }

        /* Article Content */
        .article-content-section {
            padding: 60px 0 80px;
            background: var(--bg-body);
        }
        .article-content-wrapper {
            max-width: 860px;
            margin: 0 auto;
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body p {
            margin-bottom: 1.4em;
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            font-weight: 700;
            color: var(--secondary);
            margin-top: 1.8em;
            margin-bottom: 0.8em;
            line-height: 1.4;
        }
        .article-body h2 {
            font-size: 1.65rem;
            border-bottom: 2px solid var(--border);
            padding-bottom: 10px;
        }
        .article-body h3 {
            font-size: 1.3rem;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
        }
        .article-body li {
            margin-bottom: 0.4em;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--primary-dark);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            background: var(--primary-bg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.6em 0;
            color: var(--text-light);
            font-style: normal;
        }
        .article-body blockquote p:last-child {
            margin-bottom: 0;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 1.6em auto;
            box-shadow: var(--shadow);
            max-width: 100%;
        }
        .article-body pre {
            background: var(--bg-section);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 20px;
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 1.4em 0;
        }
        .article-body code {
            background: var(--bg-section);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-dark);
        }
        .article-body pre code {
            background: none;
            padding: 0;
            color: inherit;
        }

        .article-divider {
            border: none;
            border-top: 1px solid var(--border);
            margin: 40px 0;
        }

        .article-footer-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            padding: 20px 0;
            border-top: 1px solid var(--border);
            margin-top: 40px;
        }
        .article-footer-meta .tag-item {
            display: inline-block;
            padding: 4px 14px;
            background: var(--bg-section);
            border: 1px solid var(--border);
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .article-footer-meta .tag-item:hover {
            background: var(--primary-bg);
            border-color: var(--primary);
            color: var(--primary);
        }

        .article-nav-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 16px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
            margin-top: 32px;
        }
        .article-nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: var(--bg-section);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
            font-size: 0.95rem;
        }
        .article-nav-links a:hover {
            background: var(--primary-bg);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .article-nav-links .nav-disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        @media (max-width: 768px) {
            .article-content-section {
                padding: 40px 0 60px;
            }
            .article-body {
                font-size: 1rem;
            }
            .article-body h2 {
                font-size: 1.35rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
            .article-nav-links {
                flex-direction: column;
                align-items: stretch;
            }
            .article-nav-links a {
                justify-content: center;
            }
        }

        /* Not Found */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-light);
            font-size: 1.1rem;
            margin-bottom: 24px;
        }
        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(37,99,235,0.25);
        }
        .not-found-box .btn-home:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37,99,235,0.35);
            color: #fff;
        }

        /* Related Articles */
        .related-section {
            padding: 60px 0;
            background: var(--bg-section);
        }
        .related-section .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 32px;
            text-align: center;
        }
        .related-section .section-title span {
            color: var(--primary);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .related-card .rc-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .related-card .rc-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .related-card .rc-title a {
            color: inherit;
        }
        .related-card .rc-title a:hover {
            color: var(--primary);
        }
        .related-card .rc-excerpt {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .rc-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .rc-meta i {
            margin-right: 4px;
        }

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

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 60px 0 30px;
            border-top: none;
        }
        .site-footer .site-logo {
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 12px;
        }
        .site-footer .site-logo i {
            color: var(--accent);
        }
        .site-footer p {
            color: #94a3b8;
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 340px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .footer-col a {
            display: block;
            color: #94a3b8;
            font-size: 0.9rem;
            padding: 5px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-col a i {
            width: 18px;
            text-align: center;
            margin-right: 6px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: #94a3b8;
            font-size: 1.1rem;
            transition: all var(--transition);
            padding: 0;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            padding-left: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: #64748b;
        }
        .footer-bottom a {
            color: #94a3b8;
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            .site-footer {
                padding: 40px 0 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-section);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-muted);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

        /* Selection */
        ::selection {
            background: var(--primary);
            color: #fff;
        }

        /* Focus visible for all interactive */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-xs);
        }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #0b5e8a;
            --primary-dark: #07426a;
            --primary-light: #e8f4fd;
            --accent: #f39c12;
            --accent-dark: #d68910;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0a2540;
            --text-dark: #1a2a3a;
            --text-body: #2c3e50;
            --text-muted: #6c7a8d;
            --text-light: #94a3b8;
            --border-light: #e2e8f0;
            --border-mid: #cbd5e1;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.10);
            --font-base: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            --transition: all 0.25s ease;
            --spacer-section: 5rem;
        }

        /* ===== 基础 reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-base);
            color: var(--text-body);
            background: var(--bg-light);
            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);
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
        }
        p {
            margin-top: 0;
            margin-bottom: 1rem;
        }
        ul,
        ol {
            padding-left: 1.25rem;
        }
        figure {
            margin: 0;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            margin-left: auto;
            margin-right: auto;
        }
        .container-narrow {
            max-width: 900px;
        }

        /* ===== 板块间距 ===== */
        .section {
            padding: var(--spacer-section) 0;
        }
        .section-sm {
            padding: 2.5rem 0;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.02);
            transition: var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0.7rem 1.5rem;
            gap: 1rem;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .site-logo i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .site-logo:hover {
            color: var(--primary-dark);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary-light);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
        }
        .nav-list a {
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-list a:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .nav-list a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(11, 94, 138, 0.20);
        }
        .nav-list a.active:hover {
            background: var(--primary-dark);
            color: #fff;
        }
        .nav-list a.nav-cta {
            background: var(--accent);
            color: #fff;
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            box-shadow: 0 4px 12px rgba(243, 156, 18, 0.25);
        }
        .nav-list a.nav-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(243, 156, 18, 0.30);
        }
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
            z-index: 1040;
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 820px) {
            .nav-toggle {
                display: block;
            }
            .nav-list {
                position: fixed;
                top: 0;
                right: -280px;
                width: 260px;
                height: 100vh;
                background: var(--bg-white);
                flex-direction: column;
                gap: 0.25rem;
                padding: 5rem 1.5rem 2rem;
                box-shadow: -6px 0 30px rgba(0, 0, 0, 0.08);
                transition: right 0.35s cubic-bezier(0.22, 1, 0.36, 1);
                z-index: 1050;
                overflow-y: auto;
                align-items: stretch;
                border-radius: 0;
            }
            .nav-list.open {
                right: 0;
            }
            .nav-list a {
                padding: 0.8rem 1rem;
                font-size: 1rem;
                border-radius: var(--radius-sm);
                text-align: left;
            }
            .nav-list a.nav-cta {
                justify-content: center;
                margin-top: 0.75rem;
            }
            .nav-overlay.show {
                display: block;
            }
        }
        @media (max-width: 480px) {
            .header-inner {
                padding: 0.6rem 1rem;
            }
            .site-logo {
                font-size: 1.1rem;
            }
            .site-logo i {
                font-size: 1.3rem;
            }
        }

        /* ===== Hero / Banner ===== */
        .hero-banner {
            position: relative;
            min-height: 42vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(10, 37, 64, 0.82) 0%, rgba(11, 94, 138, 0.70) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 4rem 1.5rem;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            margin-bottom: 2rem;
            overflow: hidden;
        }
        .hero-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 80px;
            background: linear-gradient(to top, var(--bg-light), transparent);
            pointer-events: none;
        }
        .hero-banner .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }
        .hero-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.20);
            margin-bottom: 0.75rem;
            letter-spacing: -0.5px;
        }
        .hero-banner p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.88);
            max-width: 600px;
            margin: 0 auto 1.8rem;
            line-height: 1.6;
        }
        .hero-banner .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            justify-content: center;
        }
        .hero-banner .hero-tags .badge {
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(4px);
            color: #fff;
            padding: 0.45rem 1.1rem;
            font-size: 0.85rem;
            font-weight: 500;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        @media (max-width: 768px) {
            .hero-banner {
                min-height: 34vh;
                padding: 3rem 1.2rem;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }
            .hero-banner h1 {
                font-size: 2rem;
            }
            .hero-banner p {
                font-size: 1rem;
            }
        }
        @media (max-width: 480px) {
            .hero-banner h1 {
                font-size: 1.6rem;
            }
            .hero-banner p {
                font-size: 0.92rem;
            }
            .hero-banner .hero-tags .badge {
                font-size: 0.75rem;
                padding: 0.3rem 0.9rem;
            }
        }

        /* ===== 卡片通用 ===== */
        .card-custom {
            background: var(--bg-white);
            border: none;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
            height: 100%;
        }
        .card-custom:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .card-custom .card-body {
            padding: 1.8rem 1.5rem;
        }
        .card-custom .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            background: var(--primary);
            margin-bottom: 1rem;
        }
        .card-custom .card-icon.icon-accent {
            background: var(--accent);
        }
        .card-custom .card-icon.icon-teal {
            background: #0ea5a0;
        }
        .card-custom .card-icon.icon-purple {
            background: #7c3aed;
        }
        .card-custom .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--text-dark);
        }
        .card-custom .card-text {
            font-size: 0.93rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== 步骤流程 ===== */
        .step-item {
            display: flex;
            gap: 1.5rem;
            padding: 1.5rem 1.8rem;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            align-items: flex-start;
            margin-bottom: 1.2rem;
            border-left: 4px solid var(--primary);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
        }
        .step-number.accent {
            background: var(--accent);
        }
        .step-number.teal {
            background: #0ea5a0;
        }
        .step-number.purple {
            background: #7c3aed;
        }
        .step-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.3rem;
            color: var(--text-dark);
        }
        .step-content p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        @media (max-width: 600px) {
            .step-item {
                flex-direction: column;
                gap: 0.75rem;
                padding: 1.2rem 1.2rem;
            }
            .step-number {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
        }

        /* ===== 图文区块 ===== */
        .media-block {
            display: flex;
            align-items: center;
            gap: 3rem;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            box-shadow: var(--shadow-sm);
        }
        .media-block.reverse {
            flex-direction: row-reverse;
        }
        .media-block .media-image {
            flex: 0 0 44%;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .media-block .media-image img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
        }
        .media-block .media-body {
            flex: 1;
        }
        .media-block .media-body h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: var(--text-dark);
        }
        .media-block .media-body p {
            font-size: 1rem;
            color: var(--text-body);
            line-height: 1.7;
        }
        .media-block .media-body .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1rem;
        }
        .media-block .media-body .tag-list .tag {
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 0.3rem 1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        @media (max-width: 820px) {
            .media-block {
                flex-direction: column !important;
                padding: 1.8rem 1.5rem;
                gap: 1.8rem;
            }
            .media-block .media-image {
                flex: 0 0 100%;
                width: 100%;
            }
            .media-block .media-body h3 {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 480px) {
            .media-block {
                padding: 1.2rem 1rem;
                border-radius: var(--radius-md);
            }
            .media-block .media-body h3 {
                font-size: 1.1rem;
            }
        }

        /* ===== 标签 / 徽章 ===== */
        .badge-custom {
            display: inline-block;
            padding: 0.35rem 1.1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .badge-custom.accent {
            background: #fef3e0;
            color: var(--accent-dark);
        }
        .badge-custom.teal {
            background: #e0f5f4;
            color: #0a7e7a;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 1.4rem 1.8rem;
            margin-bottom: 0.8rem;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border-mid);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
            gap: 1rem;
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--primary);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding-top: 0;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 320px;
            padding-top: 1rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            border-radius: var(--radius-lg);
            padding: 3.5rem 3rem;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 1.8rem;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: var(--accent);
            color: #fff;
            padding: 0.85rem 2.5rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(243, 156, 18, 0.30);
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(243, 156, 18, 0.35);
            color: #fff;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 2.5rem 1.5rem;
                border-radius: var(--radius-md);
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-cta {
                padding: 0.7rem 1.8rem;
                font-size: 0.95rem;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 4rem 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .site-footer .site-logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
        }
        .site-footer .site-logo i {
            color: var(--accent);
        }
        .site-footer .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
            line-height: 1.7;
        }
        .site-footer .footer-social a {
            display: inline-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: var(--transition);
            margin-right: 0.5rem;
        }
        .site-footer .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .site-footer .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 0.35rem 0;
            transition: var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .site-footer .footer-col a i {
            width: 1.2rem;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.5rem 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.8rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 820px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 2.5rem 0 0;
            }
        }

        /* ===== 辅助工具 ===== */
        .text-primary-custom {
            color: var(--primary) !important;
        }
        .bg-soft-primary {
            background: var(--primary-light);
        }
        .mt-2 {
            margin-top: 0.5rem;
        }
        .mt-3 {
            margin-top: 1rem;
        }
        .mt-4 {
            margin-top: 1.5rem;
        }
        .mt-5 {
            margin-top: 2.5rem;
        }
        .mb-3 {
            margin-bottom: 1rem;
        }
        .mb-4 {
            margin-bottom: 1.5rem;
        }
        .mb-5 {
            margin-bottom: 2.5rem;
        }
        .gap-2 {
            gap: 0.5rem;
        }
        .gap-3 {
            gap: 1rem;
        }
        .gap-4 {
            gap: 1.5rem;
        }
        .fw-700 {
            font-weight: 700;
        }
        .text-center {
            text-align: center;
        }
        .rounded-md {
            border-radius: var(--radius-md);
        }
        .shadow-sm {
            box-shadow: var(--shadow-sm);
        }

        /* ===== 通用按钮 ===== */
        .btn-outline-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.6rem;
            border: 2px solid var(--primary);
            border-radius: 50px;
            color: var(--primary);
            font-weight: 600;
            background: transparent;
            transition: var(--transition);
        }
        .btn-outline-primary-custom:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== 内容网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 1.8rem;
        }
        @media (max-width: 820px) {
            .grid-3 {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 600px) {
            .grid-2,
            .grid-3 {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 分隔标题 ===== */
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 0.6rem;
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .badge-custom {
            margin-bottom: 0.8rem;
        }
        @media (max-width: 600px) {
            .section-title h2 {
                font-size: 1.5rem;
            }
        }

        /* ===== 统计数字 ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            text-align: center;
        }
        .stat-item .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.3rem;
        }
        @media (max-width: 768px) {
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item .stat-number {
                font-size: 1.8rem;
            }
        }

        /* ===== 列表样式 ===== */
        .check-list {
            list-style: none;
            padding-left: 0;
        }
        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            padding: 0.4rem 0;
            font-size: 0.95rem;
            color: var(--text-body);
        }
        .check-list li i {
            color: var(--accent);
            margin-top: 0.2rem;
            flex-shrink: 0;
        }