/* roulang page: index */
:root {
            --primary: #0A2647;
            --primary-light: #1E3A5F;
            --secondary: #1E6F9F;
            --secondary-light: #4A9EC7;
            --accent: #F9A826;
            --accent-light: #FFC44D;
            --bg-light: #F5F7FA;
            --bg-dark: #0A2647;
            --text-dark: #1A1A2E;
            --text-muted: #6C757D;
            --text-light: #FFFFFF;
            --border-color: #E8ECF1;
            --radius: 16px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(10, 38, 71, 0.06);
            --shadow: 0 8px 30px rgba(10, 38, 71, 0.10);
            --shadow-lg: 0 20px 50px rgba(10, 38, 71, 0.14);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            color: var(--text-dark);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: 1200px;
            padding: 0 24px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--primary);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 2px 20px rgba(10, 38, 71, 0.3);
        }
        .site-header .navbar {
            padding: 12px 0;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: #fff !important;
            letter-spacing: 0.5px;
        }
        .site-header .navbar-brand i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .site-header .navbar-brand span {
            background: linear-gradient(135deg, #fff 60%, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.8) !important;
            font-weight: 500;
            padding: 8px 18px !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            font-size: 0.95rem;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: #fff !important;
            background: rgba(255, 255, 255, 0.1);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 18px;
            right: 18px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-actions .search-box {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 4px 16px 4px 20px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            transition: var(--transition);
        }
        .nav-actions .search-box:focus-within {
            background: rgba(255, 255, 255, 0.18);
            border-color: var(--accent);
        }
        .nav-actions .search-box input {
            background: none;
            border: none;
            outline: none;
            color: #fff;
            padding: 8px 8px 8px 0;
            font-size: 0.9rem;
            min-width: 120px;
        }
        .nav-actions .search-box input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .nav-actions .search-box i {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }
        .btn-nav-cta {
            background: var(--accent);
            color: var(--primary) !important;
            border: none;
            border-radius: 50px;
            padding: 10px 28px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-nav-cta:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(249, 168, 38, 0.35);
        }
        .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 1.4rem;
            padding: 4px 8px;
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }
        @media (max-width: 991px) {
            .navbar-nav .nav-link.active::after {
                display: none;
            }
            .nav-actions {
                margin-top: 16px;
                flex-wrap: wrap;
                width: 100%;
            }
            .nav-actions .search-box {
                flex: 1;
                min-width: 140px;
            }
            .site-header .navbar-brand {
                font-size: 1.2rem;
            }
        }
        @media (max-width: 576px) {
            .site-header .navbar-brand i {
                font-size: 1.2rem;
            }
            .site-header .navbar-brand {
                font-size: 1rem;
            }
            .btn-nav-cta {
                padding: 8px 18px;
                font-size: 0.8rem;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: var(--primary);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 38, 71, 0.92) 40%, rgba(30, 111, 159, 0.6) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(249, 168, 38, 0.18);
            border: 1px solid rgba(249, 168, 38, 0.3);
            color: var(--accent-light);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: 3.4rem;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero h1 .highlight {
            color: var(--accent);
        }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 600px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-hero-primary {
            background: var(--accent);
            color: var(--primary) !important;
            border: none;
            border-radius: 50px;
            padding: 16px 40px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-hero-primary:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(249, 168, 38, 0.35);
        }
        .btn-hero-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: #fff !important;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 50px;
            padding: 16px 36px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            backdrop-filter: blur(4px);
        }
        .btn-hero-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-3px);
            border-color: var(--accent);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stats .stat-num span {
            color: var(--accent);
        }
        .hero-stats .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }
        @media (max-width: 991px) {
            .hero h1 {
                font-size: 2.6rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
        }
        @media (max-width: 576px) {
            .hero {
                min-height: 70vh;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .hero-stats .stat-num {
                font-size: 1.5rem;
            }
            .btn-hero-primary,
            .btn-hero-secondary {
                padding: 14px 28px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Section Shared ===== */
        .section-padding {
            padding: 90px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 48px auto;
            text-align: center;
            line-height: 1.7;
        }
        .section-title-center {
            text-align: center;
        }
        .section-title-center .section-title {
            margin-bottom: 16px;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
        }

        /* ===== Features / 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: transparent;
        }
        .feature-card .icon-wrap {
            width: 70px;
            height: 70px;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px auto;
            font-size: 1.8rem;
            color: #fff;
            background: var(--primary);
        }
        .feature-card:nth-child(2) .icon-wrap {
            background: var(--secondary);
        }
        .feature-card:nth-child(3) .icon-wrap {
            background: var(--accent);
            color: var(--primary);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--primary);
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }
        @media (max-width: 991px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 28px 20px;
            }
        }

        /* ===== Services / 服务项目 ===== */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .service-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
        }
        .service-card .card-img {
            height: 210px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .service-card .card-img .img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(10, 38, 71, 0.6));
        }
        .service-card .card-body {
            padding: 24px 24px 28px;
        }
        .service-card .card-body .tag {
            display: inline-block;
            background: rgba(30, 111, 159, 0.1);
            color: var(--secondary);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .service-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .service-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .service-card .card-body .service-link {
            font-weight: 600;
            color: var(--secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
        }
        .service-card .card-body .service-link i {
            transition: var(--transition);
        }
        .service-card .card-body .service-link:hover i {
            transform: translateX(4px);
        }
        @media (max-width: 991px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
            .service-card .card-img {
                height: 170px;
            }
        }

        /* ===== CMS News / 最新资讯 ===== */
        .news-section {
            background: #fff;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .news-card {
            display: flex;
            gap: 20px;
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 20px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            align-items: flex-start;
        }
        .news-card:hover {
            border-color: var(--secondary-light);
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
        }
        .news-card .news-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }
        .news-card .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-card .news-body .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 6px;
            flex-wrap: wrap;
        }
        .news-card .news-body .news-meta .cat-badge {
            background: rgba(249, 168, 38, 0.15);
            color: #B8860B;
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.75rem;
        }
        .news-card .news-body .news-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-body .news-title a {
            color: inherit;
        }
        .news-card .news-body .news-title a:hover {
            color: var(--secondary);
        }
        .news-card .news-body .news-excerpt {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--text-muted);
            background: var(--bg-light);
            border-radius: var(--radius);
            font-size: 1rem;
        }
        .news-empty i {
            font-size: 2.4rem;
            color: var(--secondary-light);
            margin-bottom: 16px;
            display: block;
        }
        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
            .news-card {
                flex-direction: column;
                align-items: flex-start;
            }
            .news-card .news-icon {
                width: 44px;
                height: 44px;
                font-size: 1rem;
            }
        }

        /* ===== Stats / 数据统计 ===== */
        .stats-section {
            background: var(--primary);
            position: relative;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
        }
        .stats-section .container {
            position: relative;
            z-index: 1;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .stats-grid .stat-card {
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(4px);
        }
        .stats-grid .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .stats-grid .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stats-grid .stat-card .stat-number span {
            color: var(--accent);
        }
        .stats-grid .stat-card .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 6px;
        }
        @media (max-width: 991px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stats-grid .stat-card .stat-number {
                font-size: 1.8rem;
            }
            .stats-grid .stat-card {
                padding: 20px 12px;
            }
        }

        /* ===== Process / 使用流程 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--secondary), var(--accent), var(--secondary));
            opacity: 0.3;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .process-step .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px auto;
            border: 4px solid #fff;
            box-shadow: var(--shadow-sm);
        }
        .process-step:nth-child(2) .step-num {
            background: var(--secondary);
        }
        .process-step:nth-child(3) .step-num {
            background: var(--accent);
            color: var(--primary);
        }
        .process-step:nth-child(4) .step-num {
            background: #1a5a3a;
        }
        .process-step h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }
        @media (max-width: 991px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .process-grid::before {
                display: none;
            }
        }
        @media (max-width: 576px) {
            .process-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .process-step .step-num {
                width: 46px;
                height: 46px;
                font-size: 1.1rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-light);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            margin-bottom: 16px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--secondary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:focus {
            outline: 2px solid var(--secondary);
            outline-offset: -2px;
        }
        .faq-question i {
            color: var(--secondary);
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px 24px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }
        @media (max-width: 576px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px 16px 18px;
                font-size: 0.9rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-box {
            text-align: center;
            padding: 60px 20px;
        }
        .cta-box h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 32px auto;
            line-height: 1.7;
        }
        .cta-box .cta-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-cta-primary {
            background: var(--accent);
            color: var(--primary) !important;
            border: none;
            border-radius: 50px;
            padding: 16px 44px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-cta-primary:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(249, 168, 38, 0.3);
        }
        .btn-cta-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: #fff !important;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 50px;
            padding: 16px 40px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            backdrop-filter: blur(4px);
        }
        .btn-cta-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-3px);
            border-color: var(--accent);
        }
        @media (max-width: 576px) {
            .cta-box h2 {
                font-size: 1.7rem;
            }
            .cta-box p {
                font-size: 0.95rem;
            }
            .btn-cta-primary,
            .btn-cta-secondary {
                width: 100%;
                justify-content: center;
                padding: 14px 28px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #07182E;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand .footer-logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
        }
        .footer-bottom .copyright {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom .footer-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom .footer-links a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.85rem;
        }
        .footer-bottom .footer-links a:hover {
            color: var(--accent);
        }
        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition);
            z-index: 999;
            cursor: pointer;
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            background: var(--secondary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent) !important;
        }
        .bg-soft-primary {
            background: rgba(10, 38, 71, 0.03);
        }
        .rounded-xl {
            border-radius: var(--radius);
        }
        .shadow-hover:hover {
            box-shadow: var(--shadow);
        }

/* roulang page: article */
:root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg: #f8f9fa;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --text: #2b2d42;
            --text-light: #6c757d;
            --text-white: #f8f9fa;
            --border: #dee2e6;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.14);
            --transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --header-height: 76px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--header-height);
        }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px) saturate(1.4);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header .navbar {
            padding: 0;
            height: var(--header-height);
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: -0.3px;
            padding: 0;
        }
        .site-header .navbar-brand i {
            font-size: 1.6rem;
            color: var(--primary);
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-header .navbar-brand span {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text);
            padding: 0.5rem 1rem !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.06);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .search-box {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-box input {
            width: 200px;
            padding: 8px 16px 8px 38px;
            border: 1.5px solid var(--border);
            border-radius: 50px;
            background: var(--bg);
            font-size: 0.85rem;
            transition: var(--transition);
            outline: none;
        }
        .search-box input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.12);
            width: 240px;
        }
        .search-box i {
            position: absolute;
            left: 14px;
            color: var(--text-light);
            font-size: 0.9rem;
            pointer-events: none;
        }
        .btn-nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border: none;
            padding: 8px 22px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.3);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .btn-nav-cta:hover {
            transform: translateY(-2px) scale(1.03);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.4);
            color: #fff;
        }
        .navbar-toggler {
            border: none;
            padding: 6px 10px;
            font-size: 1.4rem;
            color: var(--secondary);
            background: transparent;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.2);
        }
        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                border-radius: var(--radius);
                padding: 16px 20px;
                box-shadow: var(--shadow);
                margin-top: 8px;
            }
            .nav-actions {
                flex-direction: column;
                width: 100%;
                gap: 12px;
                margin-top: 12px;
                padding-top: 12px;
                border-top: 1px solid var(--border);
            }
            .search-box input {
                width: 100%;
            }
            .search-box input:focus {
                width: 100%;
            }
            .btn-nav-cta {
                width: 100%;
                justify-content: center;
            }
            .navbar-nav .nav-link.active::after {
                display: none;
            }
        }
        @media (max-width: 576px) {
            :root {
                --header-height: 64px;
            }
            .site-header .navbar-brand {
                font-size: 1.2rem;
            }
            .site-header .navbar-brand i {
                font-size: 1.3rem;
            }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            margin-top: var(--header-height);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--secondary) 0%, #16213e 60%, #0f3460 100%);
            position: relative;
            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::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 80px;
            background: var(--bg);
            border-radius: 50% 50% 0 0 / 100% 100% 0 0;
            transform: scaleY(0.6);
            transform-origin: bottom;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .article-hero .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 20px;
            margin-bottom: 16px;
        }
        .article-hero .article-meta .badge-cat {
            background: var(--primary);
            color: #fff;
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        .article-hero .article-meta .meta-date {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .article-meta .meta-date i {
            font-size: 0.85rem;
        }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 18px;
            max-width: 800px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .article-hero .hero-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .article-hero {
                padding: 60px 0 48px;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-hero .hero-desc {
                font-size: 0.95rem;
            }
            .article-hero::after {
                height: 40px;
            }
        }
        @media (max-width: 576px) {
            .article-hero h1 {
                font-size: 1.5rem;
            }
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-content-wrap {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 48px 52px;
            border: 1px solid rgba(0, 0, 0, 0.04);
        }
        .article-content-wrap .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content-wrap .article-body h2,
        .article-content-wrap .article-body h3,
        .article-content-wrap .article-body h4 {
            margin-top: 32px;
            margin-bottom: 16px;
            font-weight: 700;
            color: var(--secondary);
        }
        .article-content-wrap .article-body h2 {
            font-size: 1.65rem;
            border-bottom: 2px solid var(--border);
            padding-bottom: 10px;
        }
        .article-content-wrap .article-body h3 {
            font-size: 1.3rem;
        }
        .article-content-wrap .article-body p {
            margin-bottom: 18px;
        }
        .article-content-wrap .article-body ul,
        .article-content-wrap .article-body ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }
        .article-content-wrap .article-body li {
            margin-bottom: 6px;
        }
        .article-content-wrap .article-body img {
            border-radius: var(--radius);
            margin: 24px auto;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        .article-content-wrap .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(230, 57, 70, 0.04);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-content-wrap .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content-wrap .article-body a:hover {
            color: var(--primary-dark);
        }
        .article-content-wrap .article-tags {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .article-content-wrap .article-tags .tag {
            background: var(--bg);
            color: var(--text-light);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 600;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .article-content-wrap .article-tags .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .article-notfound {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
        }
        .article-notfound i {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 20px;
            opacity: 0.5;
        }
        .article-notfound h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }
        .article-notfound p {
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .article-notfound .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 700;
            transition: var(--transition);
        }
        .article-notfound .btn-home:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.3);
            color: #fff;
        }
        @media (max-width: 768px) {
            .article-content-wrap {
                padding: 28px 20px;
            }
            .article-content-wrap .article-body {
                font-size: 0.98rem;
            }
            .article-content-wrap .article-body h2 {
                font-size: 1.35rem;
            }
        }
        @media (max-width: 576px) {
            .article-main {
                padding: 40px 0 60px;
            }
            .article-content-wrap {
                padding: 20px 16px;
                border-radius: var(--radius);
            }
        }

        /* ===== Related / CTA ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg);
        }
        .related-section .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 36px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            height: 180px;
            background: var(--secondary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px 22px;
        }
        .related-card .card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-body .card-meta {
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .related-card .card-body .card-meta i {
            font-size: 0.75rem;
        }
        @media (max-width: 992px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-section .section-title {
                font-size: 1.4rem;
            }
        }

        /* ===== Article CTA ===== */
        .article-cta {
            padding: 64px 0;
            background: linear-gradient(135deg, var(--secondary), #16213e);
            position: relative;
            overflow: hidden;
        }
        .article-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .article-cta .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-cta h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .article-cta p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .article-cta .btn-cta-big {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            background: #fff;
            color: var(--secondary);
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
        }
        .article-cta .btn-cta-big:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 14px 36px rgba(0, 0, 0, 0.3);
            color: var(--primary);
        }
        @media (max-width: 768px) {
            .article-cta h2 {
                font-size: 1.5rem;
            }
            .article-cta p {
                font-size: 0.95rem;
            }
            .article-cta .btn-cta-big {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-logo i {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            transform: translateX(4px);
        }
        .footer-col ul li a i {
            width: 20px;
            font-size: 0.85rem;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom .copyright {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom .footer-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom .footer-links a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
            transition: var(--transition);
        }
        .footer-bottom .footer-links a:hover {
            color: var(--primary-light);
        }
        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 40px 0 0;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-light);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--secondary-light);
        }

        /* ===== Focus & Utility ===== */
        :focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .text-primary {
            color: var(--primary) !important;
        }
        .bg-primary-soft {
            background: rgba(230, 57, 70, 0.06);
        }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 50%;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 20px rgba(230, 57, 70, 0.3);
            transition: var(--transition);
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transform: translateY(20px);
        }
        .back-top.show {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(230, 57, 70, 0.4);
            color: #fff;
        }
        @media (max-width: 576px) {
            .back-top {
                bottom: 16px;
                right: 16px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #d32f2f;
            --primary-dark: #b71c1c;
            --primary-light: #ff6659;
            --primary-gradient: linear-gradient(135deg, #d32f2f 0%, #b71c1c 100%);
            --secondary: #1a1a2e;
            --secondary-light: #2d2d44;
            --accent: #f9a825;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #0d0d1a;
            --text-dark: #1a1a2e;
            --text-body: #333333;
            --text-muted: #6c757d;
            --text-light: #f8f9fa;
            --border-color: #e0e0e0;
            --border-light: #f0f0f0;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.14);
            --shadow-hover: 0 20px 50px rgba(0,0,0,0.18);
            --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 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; }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-white);
            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; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text-dark); margin-bottom: 0.5em; }
        p { margin-bottom: 1rem; }
        ul { list-style: none; padding-left: 0; margin-bottom: 0; }
        .container { max-width: var(--container-max); padding-left: 20px; padding-right: 20px; }
        .container-fluid { padding-left: 20px; padding-right: 20px; }
        section { position: relative; }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1050;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.04);
            height: var(--header-height);
            transition: var(--transition);
            box-shadow: 0 1px 6px rgba(0,0,0,0.04);
        }
        .site-header .navbar { padding-top: 0; padding-bottom: 0; height: var(--header-height); }
        .site-header .navbar-brand {
            display: flex; align-items: center; gap: 10px;
            font-weight: 800; font-size: 1.35rem; color: var(--primary) !important;
            padding: 0; margin: 0;
        }
        .site-header .navbar-brand i { font-size: 1.5rem; color: var(--primary); }
        .site-header .navbar-brand span { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .site-header .navbar-nav .nav-link {
            font-weight: 600; font-size: 0.95rem; color: var(--text-dark) !important;
            padding: 0.5rem 1.1rem !important; border-radius: var(--radius-sm);
            transition: var(--transition); position: relative;
        }
        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link:focus {
            color: var(--primary) !important; background: rgba(211,47,47,0.06);
        }
        .site-header .navbar-nav .nav-link.active {
            color: var(--primary) !important; background: rgba(211,47,47,0.10);
        }
        .site-header .navbar-nav .nav-link.active::after {
            content: ''; position: absolute; bottom: 0; left: 1.1rem; right: 1.1rem;
            height: 3px; background: var(--primary); border-radius: 4px;
        }
        .navbar-toggler { border: none; padding: 0.4rem 0.6rem; color: var(--text-dark); font-size: 1.4rem; }
        .navbar-toggler:focus { box-shadow: none; outline: 2px solid var(--primary); }
        .nav-actions { display: flex; align-items: center; gap: 14px; }
        .search-box { position: relative; display: flex; align-items: center; }
        .search-box input {
            width: 180px; padding: 0.45rem 0.9rem 0.45rem 2.2rem;
            border: 1.5px solid var(--border-color); border-radius: 50px;
            font-size: 0.85rem; background: var(--bg-light);
            transition: var(--transition); outline: none;
        }
        .search-box input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(211,47,47,0.12); width: 220px; }
        .search-box i { position: absolute; left: 0.8rem; color: var(--text-muted); font-size: 0.9rem; pointer-events: none; }
        .btn-nav-cta {
            background: var(--primary-gradient); color: #fff !important; border: none;
            padding: 0.5rem 1.2rem; border-radius: 50px; font-weight: 700; font-size: 0.85rem;
            transition: var(--transition); box-shadow: 0 4px 14px rgba(211,47,47,0.25);
            display: flex; align-items: center; gap: 6px;
        }
        .btn-nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(211,47,47,0.35); background: var(--primary-dark); }
        .btn-nav-cta:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

        /* ===== 通用组件 ===== */
        .section-title { font-size: 2.2rem; font-weight: 800; margin-bottom: 0.5rem; letter-spacing: -0.02em; }
        .section-subtitle { font-size: 1.1rem; color: var(--text-muted); max-width: 640px; margin: 0 auto 2.5rem; line-height: 1.6; }
        .text-center .section-subtitle { margin-left: auto; margin-right: auto; }
        .btn-custom-primary {
            background: var(--primary-gradient); color: #fff; border: none;
            padding: 0.75rem 2rem; border-radius: 50px; font-weight: 700; font-size: 1rem;
            transition: var(--transition); box-shadow: 0 6px 20px rgba(211,47,47,0.25);
            display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
        }
        .btn-custom-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(211,47,47,0.35); color: #fff; background: var(--primary-dark); }
        .btn-custom-primary:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
        .btn-custom-outline {
            background: transparent; color: var(--primary); border: 2px solid var(--primary);
            padding: 0.7rem 1.8rem; border-radius: 50px; font-weight: 700; font-size: 0.95rem;
            transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
        }
        .btn-custom-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .btn-custom-outline:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
        .badge-custom {
            display: inline-block; padding: 0.3rem 0.9rem; border-radius: 50px;
            font-size: 0.8rem; font-weight: 600; background: rgba(211,47,47,0.08);
            color: var(--primary); border: 1px solid rgba(211,47,47,0.15);
        }
        .card-shadow { box-shadow: var(--shadow-sm); transition: var(--transition); border: 1px solid var(--border-light); border-radius: var(--radius-md); overflow: hidden; }
        .card-shadow:hover { box-shadow: var(--shadow-hover); transform: translateY(-6px); }
        .section-padding { padding: 5rem 0; }
        .bg-soft { background: var(--bg-light); }
        .bg-dark-section { background: var(--bg-dark); color: var(--text-light); }
        .bg-dark-section .section-title { color: #fff; }
        .bg-dark-section .section-subtitle { color: rgba(255,255,255,0.65); }

        /* ===== Hero 区域 ===== */
        .hero-section {
            min-height: 70vh; display: flex; align-items: center; position: relative;
            background: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 50%, #2d2d44 100%);
            overflow: hidden; padding: 4rem 0;
        }
        .hero-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.25; mix-blend-mode: overlay;
        }
        .hero-section::after {
            content: ''; position: absolute; bottom: -2px; left: 0; right: 0; height: 120px;
            background: linear-gradient(to top, var(--bg-white) 0%, transparent 100%);
            pointer-events: none;
        }
        .hero-section .container { position: relative; z-index: 2; }
        .hero-badge {
            display: inline-block; padding: 0.35rem 1.2rem; border-radius: 50px;
            background: rgba(211,47,47,0.15); color: var(--primary-light);
            font-size: 0.85rem; font-weight: 600; border: 1px solid rgba(211,47,47,0.2);
            margin-bottom: 1.5rem; backdrop-filter: blur(6px);
        }
        .hero-title {
            font-size: 3.2rem; font-weight: 900; color: #fff; line-height: 1.15;
            letter-spacing: -0.03em; margin-bottom: 1.2rem;
        }
        .hero-title em { font-style: normal; background: linear-gradient(135deg, #ff6659, #f9a825); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero-desc { font-size: 1.15rem; color: rgba(255,255,255,0.75); max-width: 620px; line-height: 1.7; margin-bottom: 2rem; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
        .hero-stats { display: flex; flex-wrap: wrap; gap: 2rem; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.08); }
        .hero-stat-item { display: flex; flex-direction: column; }
        .hero-stat-number { font-size: 2rem; font-weight: 900; color: #fff; line-height: 1.2; }
        .hero-stat-number small { font-size: 1rem; font-weight: 400; color: var(--accent); margin-left: 2px; }
        .hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.55); }

        /* ===== 核心卖点 ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .feature-card {
            background: var(--bg-white); border-radius: var(--radius-md); padding: 2rem 1.8rem;
            border: 1px solid var(--border-light); box-shadow: var(--shadow-sm);
            transition: var(--transition); text-align: center;
        }
        .feature-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-6px); }
        .feature-icon {
            width: 64px; height: 64px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
            background: rgba(211,47,47,0.08); color: var(--primary); font-size: 1.6rem; margin: 0 auto 1.2rem;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon { background: var(--primary); color: #fff; transform: scale(1.05); }
        .feature-card h4 { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.6rem; }
        .feature-card p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== 适用场景 / 人群 ===== */
        .scene-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
        .scene-card {
            background: var(--bg-white); border-radius: var(--radius-md); padding: 2rem 2rem 2rem 2rem;
            border: 1px solid var(--border-light); box-shadow: var(--shadow-sm);
            transition: var(--transition); display: flex; gap: 20px; align-items: flex-start;
        }
        .scene-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .scene-icon {
            flex-shrink: 0; width: 56px; height: 56px; border-radius: 50%;
            background: rgba(211,47,47,0.08); color: var(--primary);
            display: flex; align-items: center; justify-content: center; font-size: 1.4rem;
        }
        .scene-card h4 { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.4rem; }
        .scene-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== 流程步骤 ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
        .steps-grid::before {
            content: ''; position: absolute; top: 48px; left: 12%; right: 12%;
            height: 3px; background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
            z-index: 0; opacity: 0.3;
        }
        .step-item { text-align: center; position: relative; z-index: 1; }
        .step-number {
            width: 56px; height: 56px; border-radius: 50%; background: var(--primary-gradient);
            color: #fff; font-size: 1.3rem; font-weight: 800; display: flex; align-items: center; justify-content: center;
            margin: 0 auto 1rem; box-shadow: 0 4px 16px rgba(211,47,47,0.25); position: relative;
        }
        .step-item h5 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.4rem; }
        .step-item p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== 运动项目卡片 ===== */
        .program-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .program-card {
            background: var(--bg-white); border-radius: var(--radius-md); overflow: hidden;
            border: 1px solid var(--border-light); box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .program-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-6px); }
        .program-card .card-img {
            height: 180px; background: var(--secondary); position: relative; overflow: hidden;
        }
        .program-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .program-card:hover .card-img img { transform: scale(1.06); }
        .program-card .card-img .badge-top {
            position: absolute; top: 12px; left: 12px; padding: 0.3rem 0.8rem;
            border-radius: 50px; font-size: 0.75rem; font-weight: 700;
            background: rgba(211,47,47,0.85); color: #fff; border: none;
        }
        .program-card .card-body { padding: 1.4rem 1.4rem 1.6rem; }
        .program-card .card-body h5 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.4rem; }
        .program-card .card-body p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0.8rem; }
        .program-card .card-body .card-tags { display: flex; flex-wrap: wrap; gap: 6px; }
        .program-card .card-body .card-tags span {
            padding: 0.2rem 0.6rem; border-radius: 50px; font-size: 0.72rem; font-weight: 600;
            background: var(--bg-light); color: var(--text-muted);
        }

        /* ===== 数据/证据 ===== */
        .evidence-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .evidence-item { text-align: center; padding: 2rem 1rem; }
        .evidence-number { font-size: 2.8rem; font-weight: 900; color: var(--primary); line-height: 1.2; margin-bottom: 0.3rem; }
        .evidence-number small { font-size: 1.2rem; font-weight: 600; color: var(--text-muted); }
        .evidence-label { font-size: 0.95rem; color: var(--text-muted); font-weight: 500; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            border: 1px solid var(--border-color); border-radius: var(--radius-md);
            margin-bottom: 12px; overflow: hidden; background: var(--bg-white);
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            width: 100%; padding: 1.1rem 1.5rem; background: transparent; border: none;
            text-align: left; font-size: 1.02rem; font-weight: 700; color: var(--text-dark);
            display: flex; align-items: center; justify-content: space-between; gap: 12px;
            cursor: pointer; transition: var(--transition);
        }
        .faq-question::after {
            content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
            font-size: 0.8rem; color: var(--text-muted); transition: var(--transition); flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"]::after { transform: rotate(180deg); color: var(--primary); }
        .faq-question:focus-visible { outline: 3px solid var(--primary); outline-offset: -3px; border-radius: var(--radius-md); }
        .faq-answer { padding: 0 1.5rem 1.2rem; font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 50%, #2d2d44 100%);
            position: relative; overflow: hidden; padding: 5rem 0;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.10; mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { color: #fff; font-size: 2.4rem; font-weight: 900; }
        .cta-section p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 2rem; }
        .cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
        .btn-cta-primary {
            background: var(--primary-gradient); color: #fff; border: none;
            padding: 0.9rem 2.4rem; border-radius: 50px; font-weight: 800; font-size: 1.05rem;
            transition: var(--transition); box-shadow: 0 8px 28px rgba(211,47,47,0.35);
            display: inline-flex; align-items: center; gap: 10px; cursor: pointer;
        }
        .btn-cta-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 40px rgba(211,47,47,0.45); color: #fff; background: var(--primary-dark); }
        .btn-cta-primary:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
        .btn-cta-outline {
            background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.3);
            padding: 0.85rem 2.2rem; border-radius: 50px; font-weight: 700; font-size: 1rem;
            transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
        }
        .btn-cta-outline:hover { border-color: #fff; background: rgba(255,255,255,0.08); color: #fff; transform: translateY(-2px); }
        .btn-cta-outline:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0d0d1a; color: rgba(255,255,255,0.7); padding: 4rem 0 2rem; border-top: 1px solid rgba(255,255,255,0.04);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 40px; margin-bottom: 3rem; }
        .footer-logo { font-size: 1.35rem; font-weight: 800; color: #fff; margin-bottom: 0.8rem; display: flex; align-items: center; gap: 8px; }
        .footer-logo i { color: var(--primary); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); max-width: 360px; line-height: 1.7; }
        .footer-col h5 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 1.2rem; }
        .footer-col ul li { margin-bottom: 0.6rem; }
        .footer-col ul li a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: var(--transition); display: flex; align-items: center; gap: 6px; }
        .footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 2rem; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
        .footer-bottom .copyright { font-size: 0.85rem; color: rgba(255,255,255,0.4); }
        .footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
        .footer-links a { font-size: 0.85rem; color: rgba(255,255,255,0.4); transition: var(--transition); }
        .footer-links a:hover { color: var(--primary-light); }

        /* ===== 响应式 ===== */
        @media (max-width: 1199px) {
            .program-grid { grid-template-columns: repeat(2, 1fr); }
            .evidence-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 991px) {
            .hero-title { font-size: 2.4rem; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .scene-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid::before { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .nav-actions .search-box input { width: 130px; }
            .nav-actions .search-box input:focus { width: 160px; }
            .site-header .navbar-nav .nav-link { padding: 0.5rem 0.8rem !important; }
        }
        @media (max-width: 767px) {
            body { padding-top: 64px; }
            :root { --header-height: 64px; }
            .hero-title { font-size: 1.9rem; }
            .hero-desc { font-size: 1rem; }
            .hero-section { min-height: 60vh; padding: 3rem 0; }
            .section-title { font-size: 1.7rem; }
            .section-padding { padding: 3.5rem 0; }
            .features-grid { grid-template-columns: 1fr; }
            .program-grid { grid-template-columns: 1fr 1fr; }
            .evidence-grid { grid-template-columns: 1fr 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .hero-stats { gap: 1.2rem; }
            .hero-stat-number { font-size: 1.5rem; }
            .cta-section h2 { font-size: 1.8rem; }
            .site-header .navbar-brand span { font-size: 1.1rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .search-box input { width: 100px; }
            .nav-actions { gap: 8px; }
            .btn-nav-cta { padding: 0.4rem 0.9rem; font-size: 0.78rem; }
            .hero-actions { flex-direction: column; align-items: flex-start; }
            .scene-card { flex-direction: column; align-items: center; text-align: center; }
        }
        @media (max-width: 520px) {
            .hero-title { font-size: 1.6rem; }
            .program-grid { grid-template-columns: 1fr; }
            .evidence-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; gap: 16px; }
            .hero-stats { flex-direction: column; gap: 0.8rem; }
            .hero-stat-item { flex-direction: row; gap: 8px; align-items: baseline; }
            .section-title { font-size: 1.4rem; }
            .container { padding-left: 14px; padding-right: 14px; }
            .search-box { display: none; }
            .btn-nav-cta span { display: none; }
            .btn-nav-cta i { margin: 0; }
        }

        /* ===== 辅助 ===== */
        .text-primary-custom { color: var(--primary); }
        .bg-primary-soft { background: rgba(211,47,47,0.06); }
        .gap-1 { gap: 0.25rem; }
        .gap-2 { gap: 0.5rem; }
        .gap-3 { gap: 1rem; }
        .gap-4 { gap: 1.5rem; }
        .mb-0 { margin-bottom: 0; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .mt-4 { margin-top: 2rem; }