/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-nav: 0 2px 20px rgba(0, 0, 0, 0.04);
            --transition: 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --section-gap: 100px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::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: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 600;
            color: var(--primary-dark);
        }

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

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-nav);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }
        .logo {
            font-size: 22px;
            font-weight: 700;
            letter-spacing: -0.3px;
            color: var(--primary);
            white-space: nowrap;
        }
        .logo span {
            color: var(--accent);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-list a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .nav-list a:hover {
            color: var(--primary);
        }
        .nav-list a:hover::after {
            width: 100%;
        }
        .nav-list a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-list a.active::after {
            width: 100%;
            background: var(--primary);
        }
        .nav-cta {
            background: var(--primary);
            color: #fff !important;
            padding: 8px 22px !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: background var(--transition), transform var(--transition);
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-cta:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            color: #fff !important;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 36, 64, 0.88) 0%, rgba(30, 58, 95, 0.72) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 780px;
            padding: 40px 24px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            color: var(--text-white);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 20px;
            border-radius: 50px;
            letter-spacing: 0.3px;
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, 0.10);
        }
        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -1px;
            line-height: 1.15;
            margin-bottom: 20px;
        }
        .hero h1 span {
            color: var(--accent);
        }
        .hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.80);
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 16px;
            padding: 14px 36px;
            border-radius: 50px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.30);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(245, 158, 11, 0.40);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #ffffff;
            font-weight: 600;
            font-size: 16px;
            padding: 14px 36px;
            border-radius: 50px;
            border: 1.5px solid rgba(255, 255, 255, 0.30);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.50);
            transform: translateY(-2px);
        }

        /* ===== 板块统一样式 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-header h2 span {
            color: var(--accent);
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-dark);
            background: rgba(245, 158, 11, 0.10);
            padding: 4px 16px;
            border-radius: 50px;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        /* ===== 卡片网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            margin-bottom: 18px;
            background: var(--primary);
        }
        .card-icon.accent {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .card-icon.teal {
            background: #0d9488;
        }
        .card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }
        .card p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-light);
            background: var(--bg-alt);
            padding: 2px 12px;
            border-radius: 50px;
            margin-bottom: 12px;
        }

        /* ===== 封面卡片（分类入口） ===== */
        .cover-card {
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .cover-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .cover-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .cover-card-body {
            padding: 20px 24px 24px;
        }
        .cover-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }
        .cover-card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .cover-card .badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
        }

        /* ===== 最新资讯列表 ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .news-item:hover {
            background: var(--bg-alt);
            border-color: var(--border);
            transform: translateX(4px);
        }
        .news-item .news-cat {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-dark);
            background: rgba(245, 158, 11, 0.10);
            padding: 2px 12px;
            border-radius: 50px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .news-item .news-title {
            flex: 1;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .news-item:hover .news-title {
            color: var(--primary);
        }
        .news-item .news-date {
            font-size: 13px;
            color: var(--text-light);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .news-empty {
            text-align: center;
            padding: 40px 24px;
            color: var(--text-light);
            font-size: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px dashed var(--border);
        }

        /* ===== 数据/统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            transition: transform var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-2px);
        }
        .stat-item .number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 4px;
            letter-spacing: -1px;
        }
        .stat-item .number span {
            color: var(--accent);
        }
        .stat-item .label {
            font-size: 15px;
            color: var(--text-light);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary-dark);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            gap: 12px;
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: transform var(--transition);
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.40s ease, padding 0.40s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 36, 64, 0.92) 0%, rgba(30, 58, 95, 0.80) 100%);
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 80px 24px;
        }
        .cta-content h2 {
            font-size: 36px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .cta-content p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.80);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-content .btn-primary {
            font-size: 17px;
            padding: 16px 44px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.70);
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 20px;
            margin-bottom: 10px;
            display: block;
        }
        .footer-brand .logo span {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 14px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.40);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.50);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero h1 {
                font-size: 40px;
            }
        }
        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 16px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-nav);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .header-inner {
                padding: 12px 0;
            }
            .hero {
                min-height: 70vh;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p {
                font-size: 16px;
            }
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .number {
                font-size: 32px;
            }
            .news-item {
                flex-wrap: wrap;
                gap: 8px;
                padding: 14px 18px;
            }
            .news-item .news-title {
                white-space: normal;
                width: 100%;
                order: 1;
            }
            .news-item .news-date {
                order: 2;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-content h2 {
                font-size: 28px;
            }
            .cta-content {
                padding: 56px 24px;
            }
            .section-header {
                margin-bottom: 36px;
            }
            :root {
                --section-gap: 56px;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 26px;
            }
            .hero p {
                font-size: 15px;
            }
            .btn-primary,
            .btn-outline {
                font-size: 15px;
                padding: 12px 28px;
            }
            .stat-item .number {
                font-size: 28px;
            }
            .stat-item .label {
                font-size: 13px;
            }
            .card {
                padding: 24px 20px;
            }
            .cover-card-body {
                padding: 16px 18px 20px;
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 18px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 18px;
            }
            .faq-answer.open {
                padding: 0 18px 16px;
            }
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 32px;
        }
        .mb-8 {
            margin-bottom: 32px;
        }
        .gap-4 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 文章页专用 ===== */
        .article-body {
            max-width: 800px;
            margin: 0 auto;
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body h1 {
            font-size: 32px;
            margin-bottom: 12px;
        }
        .article-body .meta {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 24px;
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .article-body .meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .article-body .content {
            margin-top: 24px;
        }
        .article-body .content p {
            margin-bottom: 16px;
        }
        .article-body .content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
        }
        .article-not-found {
            text-align: center;
            padding: 80px 24px;
        }
        .article-not-found h2 {
            font-size: 28px;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-light);
            margin-bottom: 24px;
        }

        /* ===== 分类页专用 ===== */
        .category-hero {
            position: relative;
            min-height: 40vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 36, 64, 0.88) 0%, rgba(30, 58, 95, 0.72) 100%);
            z-index: 1;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 40px 24px;
        }
        .category-hero h1 {
            font-size: 40px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .category-hero p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.80);
            max-width: 600px;
            margin: 0 auto;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #fadbd8;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --accent-light: #fdebd0;
            --bg: #ffffff;
            --bg-alt: #f8f9fa;
            --bg-dark: #1a1a2e;
            --text: #2c3e50;
            --text-light: #7f8c8d;
            --text-white: #ffffff;
            --border: #e8eaed;
            --border-light: #f0f0f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --shadow-hover: 0 8px 30px rgba(231,76,60,0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1140px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            height: var(--header-h);
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .logo span { color: var(--primary); font-weight: 800; }
        .logo:hover { color: var(--secondary); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list li a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .nav-list li a::after {
            content: '';
            position: absolute;
            bottom: 2px; left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-list li a:hover { color: var(--primary); background: var(--primary-light); }
        .nav-list li a:hover::after { transform: translateX(-50%) scaleX(1); }
        .nav-list li a.active { color: var(--primary); font-weight: 600; }
        .nav-list li a.active::after { transform: translateX(-50%) scaleX(1); }
        .nav-list li a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list li a.nav-cta::after { display: none; }
        .nav-list li a.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(231,76,60,0.35); }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            border-radius: 6px;
            transition: var(--transition);
        }
        .nav-toggle span {
            display: block;
            width: 24px; height: 2px;
            background: var(--secondary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle:hover span { background: var(--primary); }

        /* ===== Mobile Nav ===== */
        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .nav-list {
                position: fixed;
                top: var(--header-h); left: 0; right: 0;
                flex-direction: column;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                padding: 20px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
                box-shadow: var(--shadow-lg);
                max-height: calc(100vh - var(--header-h));
                overflow-y: auto;
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list li a { padding: 12px 16px; font-size: 16px; width: 100%; text-align: center; }
            .nav-list li a::after { bottom: 4px; }
            .nav-list li a.nav-cta { justify-content: center; margin-top: 8px; }
        }

        /* ===== Page Hero (内页横幅) ===== */
        .page-hero {
            margin-top: var(--header-h);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--secondary) 0%, var(--bg-dark) 100%);
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-hero .container { position: relative; z-index: 1; }
        .page-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .page-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            flex-wrap: wrap;
        }
        .page-hero .breadcrumb a { color: rgba(255,255,255,0.8); }
        .page-hero .breadcrumb a:hover { color: #fff; }
        .page-hero .breadcrumb span { color: rgba(255,255,255,0.5); }
        .page-hero .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 16px;
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            flex-wrap: wrap;
        }
        .page-hero .meta i { margin-right: 4px; }
        .page-hero .meta .tag {
            display: inline-block;
            padding: 2px 12px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg);
        }
        .article-wrapper {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-content {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 0;
        }
        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--secondary);
            margin: 36px 0 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--primary-light);
        }
        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--secondary);
            margin: 28px 0 12px;
        }
        .article-body p {
            margin-bottom: 18px;
        }
        .article-body ul, .article-body ol {
            margin: 16px 0 20px;
            padding-left: 24px;
        }
        .article-body ul li {
            list-style: disc;
            margin-bottom: 8px;
        }
        .article-body ol li {
            list-style: decimal;
            margin-bottom: 8px;
        }
        .article-body a { color: var(--primary); text-decoration: underline; }
        .article-body a:hover { color: var(--primary-dark); }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--secondary);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 24px auto;
            box-shadow: var(--shadow);
        }
        .article-body .img-caption {
            text-align: center;
            font-size: 13px;
            color: var(--text-light);
            margin-top: -12px;
            margin-bottom: 24px;
        }
        .article-body code {
            background: var(--bg-alt);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 14px;
            color: var(--primary-dark);
        }
        .article-body pre {
            background: var(--bg-dark);
            color: #e8eaed;
            padding: 20px 24px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 24px 0;
        }
        .article-body pre code { background: none; color: inherit; padding: 0; font-size: 14px; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list li a {
            font-size: 14px;
            color: var(--text);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            transition: var(--transition);
        }
        .sidebar-list li a:hover { color: var(--primary); transform: translateX(4px); }
        .sidebar-list li a .num {
            color: var(--text-light);
            font-weight: 500;
            min-width: 20px;
        }
        .sidebar-cta {
            text-align: center;
        }
        .sidebar-cta p {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .sidebar-cta .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .sidebar-cta .btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(231,76,60,0.3); }

        /* ===== Not Found ===== */
        .not-found-wrap {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-wrap i { font-size: 64px; color: var(--text-light); margin-bottom: 24px; }
        .not-found-wrap h2 { font-size: 28px; color: var(--secondary); margin-bottom: 12px; }
        .not-found-wrap p { color: var(--text-light); margin-bottom: 24px; }
        .not-found-wrap .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-wrap .btn:hover { background: var(--primary-dark); transform: translateY(-2px); }

        /* ===== Related Section ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-alt);
        }
        .related-section .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--secondary);
            text-align: center;
            margin-bottom: 40px;
            position: relative;
        }
        .related-section .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .related-card .card-img {
            height: 180px;
            background: var(--bg-alt);
            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; }
        .related-card .card-body h4 { font-size: 16px; font-weight: 600; color: var(--secondary); margin-bottom: 8px; line-height: 1.4; }
        .related-card .card-body h4 a { color: var(--secondary); }
        .related-card .card-body h4 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 13px; color: var(--text-light); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-meta { display: flex; align-items: center; gap: 12px; margin-top: 12px; font-size: 12px; color: var(--text-light); }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 60px 0;
            background: var(--bg);
        }
        .faq-section .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--secondary);
            text-align: center;
            margin-bottom: 40px;
            position: relative;
        }
        .faq-section .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 500;
            color: var(--secondary);
            cursor: pointer;
            transition: var(--transition);
            gap: 12px;
        }
        .faq-question i { color: var(--primary); transition: var(--transition); font-size: 14px; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            padding: 0 24px;
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--secondary), var(--bg-dark));
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 1; text-align: center; }
        .cta-section h2 { font-size: 30px; font-weight: 700; color: var(--text-white); margin-bottom: 12px; }
        .cta-section p { font-size: 16px; color: rgba(255,255,255,0.8); margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .cta-section .btn-group { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .cta-section .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
        }
        .cta-section .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 24px rgba(231,76,60,0.4); }
        .cta-section .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.3);
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
        }
        .cta-section .btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-2px); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { color: #fff; font-size: 22px; margin-bottom: 16px; display: inline-block; }
        .footer-brand .logo span { color: var(--primary); }
        .footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 300px; }
        .footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.6); transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-wrapper { grid-template-columns: 1fr; gap: 32px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
        }
        @media (max-width: 768px) {
            .page-hero { padding: 60px 0 40px; }
            .page-hero h1 { font-size: 24px; }
            .article-main { padding: 40px 0 60px; }
            .article-body { font-size: 15px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .cta-section h2 { font-size: 24px; }
            .sidebar-card { padding: 20px; }
        }
        @media (max-width: 520px) {
            .page-hero h1 { font-size: 20px; }
            .page-hero .meta { font-size: 12px; gap: 8px; }
            .article-body h2 { font-size: 20px; }
            .article-body h3 { font-size: 18px; }
            .cta-section .btn-primary, .cta-section .btn-outline { width: 100%; justify-content: center; }
            .related-card .card-img { height: 140px; }
            .faq-question { font-size: 14px; padding: 14px 16px; }
            .faq-answer { font-size: 13px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a73e8;
            --primary-dark: #1557b0;
            --primary-light: #4a90d9;
            --primary-bg: #eef4fd;
            --accent: #ff6b35;
            --accent-dark: #e55a2b;
            --accent-light: #ff8a5c;
            --bg: #ffffff;
            --bg-alt: #f7f9fc;
            --bg-card: #ffffff;
            --text: #1a2332;
            --text-light: #5a6a7e;
            --text-muted: #8a9bb0;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .logo span {
            color: var(--primary);
            font-weight: 600;
        }
        .logo:hover { color: var(--text); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-list li a {
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-light);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-list li a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .nav-list li a:hover { color: var(--primary); }
        .nav-list li a:hover::after { width: 100%; }
        .nav-list li a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-list li a.active::after {
            width: 100%;
        }
        .nav-list li a.nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.875rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .nav-list li a.nav-cta i { font-size: 1rem; }
        .nav-list li a.nav-cta::after { display: none; }
        .nav-list li a.nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(26,115,232,0.35);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px 4px;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle:hover span { background: var(--primary); }

        /* ===== Mobile Nav ===== */
        @media (max-width: 820px) {
            .nav-list {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 24px 32px 40px;
                gap: 18px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.4s ease, opacity 0.4s ease;
                box-shadow: var(--shadow-lg);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list li a { font-size: 1.05rem; padding: 8px 0; }
            .nav-list li a.nav-cta { justify-content: center; margin-top: 8px; }
            .nav-toggle { display: flex; }
        }
        @media (max-width: 480px) {
            .logo { font-size: 1.25rem; }
            .header-inner { padding: 0 16px; }
            .container { padding: 0 16px; }
        }

        /* ===== Banner / Hero ===== */
        .category-banner {
            position: relative;
            padding: 100px 0 90px;
            background: var(--primary-bg);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,115,232,0.88) 0%, rgba(21,87,176,0.76) 100%);
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .category-banner p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.92);
            max-width: 680px;
            margin: 0 auto 10px;
            line-height: 1.7;
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            color: #fff;
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
        }
        .banner-badge i { color: #ffd700; }

        @media (max-width: 768px) {
            .category-banner { padding: 70px 0 60px; }
            .category-banner h1 { font-size: 2rem; }
            .category-banner p { font-size: 1rem; }
            .banner-badge { font-size: 0.78rem; padding: 6px 16px; }
        }
        @media (max-width: 480px) {
            .category-banner { padding: 50px 0 44px; }
            .category-banner h1 { font-size: 1.6rem; }
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 580px;
            margin: 0 auto;
        }
        .section-title .title-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-title { margin-bottom: 36px; }
            .section-title h2 { font-size: 1.6rem; }
            .section-title p { font-size: 0.95rem; }
        }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 18px;
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .card p {
            font-size: 0.925rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .card .card-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-top: 14px;
        }

        @media (max-width: 1000px) {
            .card-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
        }
        @media (max-width: 600px) {
            .card-grid { grid-template-columns: 1fr; gap: 16px; }
            .card { padding: 24px 20px; }
        }

        /* ===== Steps / Timeline ===== */
        .steps-wrapper {
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 800px;
            margin: 0 auto;
        }
        .step-item {
            display: flex;
            gap: 24px;
            padding: 28px 0;
            border-bottom: 1px solid var(--border);
            position: relative;
        }
        .step-item:last-child { border-bottom: none; }
        .step-num {
            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: 1.1rem;
            margin-top: 2px;
        }
        .step-content h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-content p {
            font-size: 0.925rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .step-content .step-note {
            display: inline-block;
            background: #f0f7ff;
            color: var(--primary);
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 500;
            margin-top: 8px;
        }

        @media (max-width: 600px) {
            .step-item { gap: 16px; padding: 20px 0; }
            .step-num { width: 36px; height: 36px; font-size: 0.95rem; }
            .step-content h3 { font-size: 1rem; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.975rem;
            color: var(--text);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-question:hover { background: var(--bg-alt); }
        .faq-question i {
            color: var(--primary);
            font-size: 0.85rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        @media (max-width: 600px) {
            .faq-question { padding: 14px 16px; font-size: 0.9rem; }
            .faq-answer { padding: 0 16px 14px; }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 14px;
            font-weight: 700;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.9);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #fff;
            color: var(--primary);
            padding: 16px 40px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
        }
        .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(0,0,0,0.2);
            background: #f5f8ff;
            color: var(--primary-dark);
        }
        .cta-btn i { font-size: 1.1rem; }

        @media (max-width: 768px) {
            .cta-section { padding: 52px 0; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-btn { padding: 14px 32px; font-size: 0.9rem; }
        }

        /* ===== Safety Tips ===== */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .safety-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .safety-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .safety-card .safety-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .safety-card h4 {
            font-size: 0.975rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .safety-card p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.5;
        }

        @media (max-width: 860px) {
            .safety-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
        }
        @media (max-width: 480px) {
            .safety-grid { grid-template-columns: 1fr; }
        }

        /* ===== Features Row ===== */
        .feature-row {
            display: flex;
            align-items: center;
            gap: 48px;
            margin-bottom: 56px;
        }
        .feature-row:last-child { margin-bottom: 0; }
        .feature-row.reverse { flex-direction: row-reverse; }
        .feature-img {
            flex: 1;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            min-height: 240px;
            background: var(--bg-alt);
        }
        .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .feature-img:hover img { transform: scale(1.03); }
        .feature-text {
            flex: 1;
        }
        .feature-text h3 {
            font-size: 1.4rem;
            margin-bottom: 12px;
        }
        .feature-text p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .feature-text .feature-list {
            margin-top: 12px;
        }
        .feature-text .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 8px;
        }
        .feature-text .feature-list li i {
            color: var(--primary);
            margin-top: 3px;
            flex-shrink: 0;
        }

        @media (max-width: 860px) {
            .feature-row { flex-direction: column !important; gap: 24px; }
            .feature-img { width: 100%; min-height: 200px; }
            .feature-text h3 { font-size: 1.2rem; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f1724;
            color: rgba(255,255,255,0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
            display: inline-block;
        }
        .footer-brand .logo span { color: var(--primary-light); }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 320px;
            margin-top: 10px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover { color: var(--primary-light); }
        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--primary-light); }

        @media (max-width: 820px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }

        /* ===== Focus & Accessibility ===== */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { transition-duration: 0.01ms !important; }
        }