/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f172a;
            --primary-light: #1e293b;
            --secondary: #3b82f6;
            --secondary-dark: #2563eb;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg: #f1f5f9;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-lighter: #94a3b8;
            --text-white: #f8fafc;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-top-height: 60px;
            --header-bottom-height: 48px;
            --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-dark);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 600;
            color: var(--primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 12px;
            color: var(--primary);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px auto;
            line-height: 1.6;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 0 auto 16px auto;
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
        }

        /* ===== Header / Nav (双层频道Tabs) ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
        }
        .header-top {
            height: var(--header-top-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .header-logo i {
            color: var(--secondary);
            font-size: 1.6rem;
        }
        .header-logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 40px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
        }
        .header-search input {
            background: transparent;
            padding: 8px 10px;
            min-width: 180px;
            font-size: 0.9rem;
            color: var(--text);
        }
        .header-search input::placeholder {
            color: var(--text-lighter);
        }
        .header-search i {
            color: var(--text-lighter);
            font-size: 0.9rem;
        }
        .header-cta {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            color: #fff;
            padding: 8px 22px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
        }
        .header-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
            color: #fff;
        }
        .header-cta:active {
            transform: translateY(0);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--primary);
            padding: 4px 8px;
            border-radius: 6px;
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--bg);
        }

        /* 第二行：频道Tabs */
        .header-bottom {
            border-top: 1px solid var(--border-light);
            background: var(--bg-card);
        }
        .header-bottom-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            height: var(--header-bottom-height);
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            gap: 4px;
        }
        .header-bottom-inner::-webkit-scrollbar {
            display: none;
        }
        .nav-tabs {
            display: flex;
            gap: 4px;
            flex-shrink: 0;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .nav-tab i {
            font-size: 0.85rem;
        }
        .nav-tab:hover {
            color: var(--secondary);
            background: rgba(59, 130, 246, 0.06);
        }
        .nav-tab.active {
            color: var(--secondary);
            background: rgba(59, 130, 246, 0.1);
            border-color: rgba(59, 130, 246, 0.2);
            font-weight: 600;
        }
        .nav-tab.active i {
            color: var(--secondary);
        }

        @media (max-width: 768px) {
            .header-top {
                padding: 0 16px;
                height: 56px;
            }
            .header-logo {
                font-size: 1.15rem;
            }
            .header-logo i {
                font-size: 1.3rem;
            }
            .header-search {
                display: none;
            }
            .header-cta {
                padding: 6px 16px;
                font-size: 0.82rem;
            }
            .mobile-toggle {
                display: block;
            }
            .header-bottom-inner {
                padding: 0 12px;
                height: 44px;
            }
            .nav-tab {
                padding: 6px 14px;
                font-size: 0.82rem;
            }
        }
        @media (max-width: 480px) {
            .header-cta {
                padding: 5px 12px;
                font-size: 0.75rem;
            }
            .nav-tab {
                padding: 5px 10px;
                font-size: 0.78rem;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(15, 23, 42, 0.55) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 780px;
            padding: 60px 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(245, 158, 11, 0.2);
            color: var(--accent);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(245, 158, 11, 0.25);
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 1px;
            line-height: 1.2;
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--accent), #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: rgba(248, 250, 252, 0.85);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            border: none;
        }
        .hero-btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
        }
        .hero-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.45);
            color: #fff;
        }
        .hero-btn-secondary {
            background: rgba(255, 255, 255, 0.12);
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(4px);
        }
        .hero-btn-secondary:hover {
            background: rgba(255, 255, 255, 0.22);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-num {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-white);
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(248, 250, 252, 0.65);
            margin-top: 2px;
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 420px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-content {
                padding: 40px 16px;
            }
            .hero-btn {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat-num {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-stats {
                gap: 16px;
            }
        }

        /* ===== Features / 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--border);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px auto;
            font-size: 1.5rem;
            color: #fff;
        }
        .feature-icon.blue {
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
        }
        .feature-icon.gold {
            background: linear-gradient(135deg, #f59e0b, #d97706);
        }
        .feature-icon.green {
            background: linear-gradient(135deg, #10b981, #059669);
        }
        .feature-icon.purple {
            background: linear-gradient(135deg, #8b5cf6, #6d28d9);
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--primary);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 16px;
            }
        }

        /* ===== Category / 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .category-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover img {
            transform: scale(1.03);
        }
        .category-card-body {
            padding: 20px 20px 24px;
        }
        .category-card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--primary);
        }
        .category-card-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .category-card-body .tag {
            display: inline-block;
            margin-top: 10px;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 500;
            background: rgba(59, 130, 246, 0.08);
            color: var(--secondary);
        }

        @media (max-width: 768px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .category-card img {
                height: 150px;
            }
            .category-card-body {
                padding: 14px 14px 18px;
            }
        }
        @media (max-width: 480px) {
            .category-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Latest Posts / 最新资讯 ===== */
        .posts-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
            max-width: 800px;
            margin: 0 auto;
        }
        .post-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-card);
            padding: 20px 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .post-item:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--border);
            transform: translateX(3px);
        }
        .post-item-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(59, 130, 246, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary);
            font-size: 1rem;
        }
        .post-item-content {
            flex: 1;
            min-width: 0;
        }
        .post-item-content h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .post-item-content h4 a {
            color: var(--primary);
        }
        .post-item-content h4 a:hover {
            color: var(--secondary);
        }
        .post-item-content .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-lighter);
        }
        .post-item-content .post-meta i {
            font-size: 0.7rem;
            margin-right: 2px;
        }
        .post-item-content .post-desc {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-top: 4px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .posts-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-lighter);
            font-size: 1rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .posts-empty i {
            font-size: 2rem;
            margin-bottom: 12px;
            display: block;
            color: var(--text-lighter);
        }

        @media (max-width: 768px) {
            .post-item {
                padding: 16px;
                gap: 12px;
            }
            .post-item-content h4 {
                font-size: 0.92rem;
            }
            .post-item-icon {
                width: 34px;
                height: 34px;
                font-size: 0.85rem;
            }
        }

        /* ===== Process Flow / 注册流程 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(to right, var(--secondary), var(--accent));
            z-index: 0;
            opacity: 0.3;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            background: var(--bg-card);
            padding: 28px 16px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .process-step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 14px auto;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
        }
        .process-step h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--primary);
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.5;
        }

        @media (max-width: 768px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .process-grid::before {
                display: none;
            }
            .process-step {
                padding: 20px 12px;
            }
        }
        @media (max-width: 480px) {
            .process-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 740px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-lg);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--primary);
            cursor: pointer;
            transition: var(--transition);
            gap: 12px;
        }
        .faq-question i {
            color: var(--secondary);
            font-size: 0.9rem;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px 24px;
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 16px 14px 16px;
                font-size: 0.88rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.65) 100%);
            z-index: 1;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .cta-content h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: rgba(248, 250, 252, 0.8);
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 16px 44px;
            border-radius: 40px;
            font-size: 1.05rem;
            font-weight: 600;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
            transition: var(--transition);
        }
        .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.5);
            color: #fff;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-content h2 {
                font-size: 1.5rem;
            }
            .cta-content p {
                font-size: 0.95rem;
            }
            .cta-btn {
                padding: 14px 32px;
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(248, 250, 252, 0.7);
            padding: 48px 0 24px 0;
            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 h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand h3 i {
            color: var(--secondary);
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: rgba(248, 250, 252, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(248, 250, 252, 0.6);
            transition: 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: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(248, 250, 252, 0.45);
        }
        .footer-bottom a {
            color: rgba(248, 250, 252, 0.55);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .site-footer {
                padding: 32px 0 16px 0;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-card);
            color: var(--primary);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            transition: var(--transition);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .bg-white {
            background: var(--bg-card);
        }
        .bg-light {
            background: var(--bg);
        }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }
            .section {
                padding: 32px 0;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .section-subtitle {
                font-size: 0.88rem;
                margin-bottom: 24px;
            }
            .hero h1 {
                font-size: 1.4rem;
            }
            .hero p {
                font-size: 0.88rem;
            }
            .hero-stats {
                gap: 12px;
            }
            .hero-stat-num {
                font-size: 1.2rem;
            }
            .hero-stat-label {
                font-size: 0.75rem;
            }
            .process-step-num {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #7C3AED;
            --primary-light: #8B5CF6;
            --primary-dark: #6D28D9;
            --secondary: #F59E0B;
            --secondary-light: #FBBF24;
            --accent: #FF6B35;
            --bg-body: #F8FAFC;
            --bg-card: #FFFFFF;
            --bg-dark: #0F172A;
            --bg-dark-alt: #1E293B;
            --text-primary: #1E293B;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --text-inverse: #F8FAFC;
            --border-light: #E2E8F0;
            --border-med: #CBD5E1;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.18);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-top-h: 60px;
            --header-nav-h: 52px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: 4px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-primary); }
        h1 { font-size: 2.5rem; font-weight: 800; }
        h2 { font-size: 2rem; font-weight: 700; }
        h3 { font-size: 1.35rem; font-weight: 600; }
        h4 { font-size: 1.1rem; font-weight: 600; }
        p { margin-bottom: 0.75rem; color: var(--text-secondary); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Top Bar ===== */
        .site-header {
            background: var(--bg-dark);
            color: var(--text-inverse);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-top-h);
            padding: 0 24px;
            max-width: var(--max-width);
            margin: 0 auto;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            white-space: nowrap;
        }
        .logo i { color: var(--secondary); font-size: 1.5rem; }
        .logo span { background: linear-gradient(135deg, #fff 60%, var(--secondary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.1);
            border-radius: 40px;
            padding: 0 12px 0 16px;
            border: 1px solid rgba(255,255,255,0.08);
            transition: var(--transition);
            max-width: 240px;
        }
        .search-box:focus-within { background: rgba(255,255,255,0.18); border-color: var(--secondary); }
        .search-box input {
            background: transparent;
            border: none;
            padding: 8px 0;
            color: #fff;
            width: 140px;
            outline: none;
            font-size: 0.9rem;
        }
        .search-box input::placeholder { color: rgba(255,255,255,0.5); }
        .search-box button { color: rgba(255,255,255,0.7); padding: 6px 4px; font-size: 0.95rem; transition: var(--transition); }
        .search-box button:hover { color: var(--secondary); }
        .btn-cta-sm {
            background: var(--secondary);
            color: #1E293B;
            font-weight: 600;
            padding: 7px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-cta-sm:hover { background: var(--secondary-light); transform: scale(1.04); color: #1E293B; }

        /* ===== Nav Tabs ===== */
        .nav-tabs-wrap {
            background: var(--bg-dark-alt);
            border-top: 1px solid rgba(255,255,255,0.06);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-tabs-wrap::-webkit-scrollbar { display: none; }
        .nav-tabs {
            display: flex;
            gap: 4px;
            padding: 0 24px;
            height: var(--header-nav-h);
            align-items: center;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255,255,255,0.7);
            transition: var(--transition);
            white-space: nowrap;
            background: transparent;
        }
        .nav-tab i { font-size: 0.85rem; }
        .nav-tab:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .nav-tab.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(124,58,237,0.35);
        }
        .nav-tab.active:hover { background: var(--primary-light); }

        /* ===== Mobile toggle ===== */
        .mobile-toggle { display: none; background: rgba(255,255,255,0.08); border-radius: 8px; padding: 6px 10px; color: #fff; font-size: 1.3rem; }
        @media (max-width: 768px) {
            .header-top { padding: 0 16px; }
            .logo { font-size: 1.05rem; }
            .logo i { font-size: 1.2rem; }
            .search-box { max-width: 140px; }
            .search-box input { width: 80px; }
            .btn-cta-sm { padding: 5px 14px; font-size: 0.8rem; }
            .nav-tabs { padding: 0 16px; gap: 4px; }
            .nav-tab { padding: 6px 14px; font-size: 0.82rem; }
            .nav-tab i { display: none; }
            .mobile-toggle { display: block; }
        }
        @media (max-width: 520px) {
            .header-top { flex-wrap: wrap; height: auto; padding: 8px 12px; gap: 8px; }
            .logo { font-size: 0.95rem; }
            .search-box { max-width: 100%; flex: 1; }
            .search-box input { width: 100%; }
            .btn-cta-sm { font-size: 0.75rem; padding: 4px 12px; }
            .nav-tabs { padding: 0 12px; }
            .nav-tab { padding: 5px 10px; font-size: 0.75rem; }
        }

        /* ===== Hero / Banner (inner) ===== */
        .page-hero {
            position: relative;
            min-height: 300px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(15,23,42,0.92), rgba(30,41,59,0.88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 60px 24px;
            color: #fff;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(124,58,237,0.15) 0%, transparent 60%, rgba(15,23,42,0.4) 100%);
            pointer-events: none;
        }
        .page-hero .hero-content { position: relative; z-index: 2; max-width: 780px; }
        .page-hero h1 { color: #fff; font-size: 2.6rem; font-weight: 800; margin-bottom: 16px; }
        .page-hero h1 i { color: var(--secondary); margin-right: 10px; }
        .page-hero p { color: rgba(255,255,255,0.8); font-size: 1.15rem; max-width: 600px; margin: 0 auto 24px; }
        .hero-badge {
            display: inline-block;
            background: rgba(245,158,11,0.2);
            border: 1px solid rgba(245,158,11,0.3);
            color: var(--secondary-light);
            padding: 4px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
        .btn-primary, .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 34px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 18px rgba(124,58,237,0.35);
        }
        .btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(124,58,237,0.4); color: #fff; }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.3);
        }
        .btn-outline-light:hover { border-color: #fff; background: rgba(255,255,255,0.08); transform: translateY(-2px); color: #fff; }
        @media (max-width: 768px) {
            .page-hero { min-height: 240px; padding: 40px 20px; }
            .page-hero h1 { font-size: 1.8rem; }
            .page-hero p { font-size: 1rem; }
            .btn-primary, .btn-outline-light { padding: 11px 24px; font-size: 0.9rem; }
        }
        @media (max-width: 520px) {
            .page-hero h1 { font-size: 1.4rem; }
            .page-hero p { font-size: 0.9rem; }
            .hero-actions { flex-direction: column; align-items: center; }
        }

        /* ===== Section Shared ===== */
        section { padding: 70px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { position: relative; display: inline-block; }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p { max-width: 600px; margin: 12px auto 0; color: var(--text-muted); font-size: 1.05rem; }
        .section-sub { text-align: center; max-width: 700px; margin: -32px auto 48px; color: var(--text-muted); font-size: 1rem; }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
        .step-number {
            width: 52px;
            height: 52px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 700;
            margin: 0 auto 18px;
            box-shadow: 0 4px 14px rgba(124,58,237,0.25);
        }
        .step-card h4 { margin-bottom: 10px; font-size: 1.1rem; }
        .step-card p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0; }
        .step-card .step-icon { font-size: 2rem; color: var(--primary); margin-bottom: 12px; }
        @media (max-width: 1024px) {
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .steps-grid { grid-template-columns: 1fr; gap: 16px; }
            .step-card { padding: 24px 16px 20px; }
        }

        /* ===== Detailed Guide (图文) ===== */
        .guide-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            margin-bottom: 30px;
        }
        .guide-block:last-child { margin-bottom: 0; }
        .guide-block.reverse { direction: rtl; }
        .guide-block.reverse > * { direction: ltr; }
        .guide-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--bg-dark);
        }
        .guide-img img { width: 100%; height: 280px; object-fit: cover; transition: var(--transition); }
        .guide-img:hover img { transform: scale(1.03); }
        .guide-text h3 { margin-bottom: 14px; font-size: 1.4rem; }
        .guide-text h3 i { color: var(--primary); margin-right: 8px; }
        .guide-text p { color: var(--text-secondary); line-height: 1.7; }
        .guide-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
        .tag {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            background: #EEF2FF;
            color: var(--primary);
            border: 1px solid #DDD6FE;
        }
        .tag.orange { background: #FFF7ED; color: #C2410C; border-color: #FED7AA; }
        .tag.green { background: #F0FDF4; color: #166534; border-color: #BBF7D0; }
        @media (max-width: 900px) {
            .guide-block { grid-template-columns: 1fr; padding: 28px; }
            .guide-block.reverse { direction: ltr; }
            .guide-img img { height: 220px; }
        }
        @media (max-width: 520px) {
            .guide-block { padding: 20px; gap: 20px; }
            .guide-img img { height: 180px; }
            .guide-text h3 { font-size: 1.15rem; }
        }

        /* ===== Tips / Notice ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .tip-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .tip-card:hover { box-shadow: var(--shadow-md); border-color: var(--border-med); }
        .tip-icon { font-size: 1.8rem; color: var(--secondary); flex-shrink: 0; margin-top: 2px; }
        .tip-card h4 { font-size: 1rem; margin-bottom: 6px; }
        .tip-card p { font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 0; }
        @media (max-width: 900px) {
            .tips-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .tips-grid { grid-template-columns: 1fr; }
            .tip-card { padding: 20px 16px; }
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-med); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            gap: 12px;
            transition: var(--transition);
        }
        .faq-question:hover { background: #F1F5F9; }
        .faq-question i { color: var(--primary); font-size: 1.1rem; transition: var(--transition); }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            border-top: 0 solid var(--border-light);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 16px 24px 20px;
            border-top-width: 1px;
        }
        @media (max-width: 520px) {
            .faq-question { padding: 14px 16px; font-size: 0.92rem; }
            .faq-answer { padding: 0 16px; font-size: 0.88rem; }
            .faq-item.open .faq-answer { padding: 12px 16px 16px; }
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--bg-dark), var(--bg-dark-alt)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(245,158,11,0.1));
            pointer-events: none;
        }
        .cta-block * { position: relative; z-index: 2; }
        .cta-block h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
        .cta-block p { color: rgba(255,255,255,0.8); font-size: 1.1rem; max-width: 560px; margin: 0 auto 28px; }
        .cta-block .btn-primary { background: var(--secondary); color: #1E293B; box-shadow: 0 4px 18px rgba(245,158,11,0.35); }
        .cta-block .btn-primary:hover { background: var(--secondary-light); box-shadow: 0 8px 28px rgba(245,158,11,0.4); }
        @media (max-width: 768px) {
            .cta-block { padding: 40px 24px; }
            .cta-block h2 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .cta-block { padding: 32px 18px; }
            .cta-block h2 { font-size: 1.25rem; }
            .cta-block p { font-size: 0.95rem; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 0;
            margin-top: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand h3 { color: #fff; font-size: 1.3rem; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
        .footer-brand h3 i { color: var(--secondary); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); max-width: 320px; line-height: 1.7; }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
        .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(--secondary); padding-left: 4px; }
        .footer-bottom {
            padding: 22px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--secondary); }
        @media (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .site-footer { padding: 36px 0 0; }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 16px 0 0;
            font-size: 0.88rem;
            color: var(--text-muted);
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-secondary); font-weight: 500; }
        .breadcrumb i { font-size: 0.7rem; color: var(--text-muted); }

        /* ===== Responsive extras ===== */
        @media (max-width: 1024px) {
            section { padding: 50px 0; }
            .section-title { margin-bottom: 32px; }
        }
        @media (max-width: 768px) {
            section { padding: 36px 0; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            .container { padding: 0 16px; }
            .breadcrumb { padding-left: 16px; padding-right: 16px; font-size: 0.8rem; }
        }
        @media (max-width: 520px) {
            section { padding: 28px 0; }
            h1 { font-size: 1.4rem; }
            h2 { font-size: 1.25rem; }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
        .anim-fade-up { animation: fadeUp 0.6s ease forwards; }
        .anim-delay-1 { animation-delay: 0.1s; }
        .anim-delay-2 { animation-delay: 0.2s; }
        .anim-delay-3 { animation-delay: 0.3s; }
        .anim-delay-4 { animation-delay: 0.4s; }

        /* ===== Flow line for steps ===== */
        .steps-grid { position: relative; }
        @media (min-width: 1025px) {
            .steps-grid .step-card:not(:last-child)::after {
                content: '→';
                position: absolute;
                right: -18px;
                top: 50%;
                transform: translateY(-50%);
                font-size: 1.8rem;
                color: var(--primary-light);
                opacity: 0.4;
                font-weight: 300;
                pointer-events: none;
            }
        }

/* roulang page: article */
:root {
  --primary: #e63946;
  --primary-dark: #c1121f;
  --primary-light: #ff6b7a;
  --secondary: #1d3557;
  --secondary-light: #457b9d;
  --accent: #f4a261;
  --bg: #f8f9fa;
  --bg-card: #ffffff;
  --bg-dark: #1a1a2e;
  --text: #1e1e2f;
  --text-light: #6c757d;
  --text-white: #f8f9fa;
  --border: #e0e0e0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --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(230,57,70,0.15);
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --font: 'Segoe UI','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --max-w: 1200px;
  --nav-h: 70px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button,.btn{cursor:pointer;font-family:inherit;border:none;outline:none;transition:var(--transition)}
input,textarea{font-family:inherit;outline:none;border:none}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 20px}
.section{padding:80px 0}
.section-title{font-size:2rem;font-weight:800;margin-bottom:12px;color:var(--secondary);letter-spacing:-0.5px}
.section-sub{font-size:1.05rem;color:var(--text-light);margin-bottom:40px;max-width:640px}
.text-center{text-align:center}
.flex-center{display:flex;align-items:center;justify-content:center}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;border-radius:50px;font-size:1rem;font-weight:600;line-height:1.2;transition:var(--transition);border:2px solid transparent}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 25px rgba(230,57,70,0.35)}
.btn-secondary{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-secondary:hover{background:var(--primary);color:#fff;transform:translateY(-2px);box-shadow:0 8px 25px rgba(230,57,70,0.2)}
.btn-white{background:#fff;color:var(--primary);border-color:#fff}
.btn-white:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-sm{padding:10px 22px;font-size:0.9rem}
.card{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:var(--transition)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.badge{display:inline-block;padding:4px 14px;border-radius:50px;font-size:0.78rem;font-weight:600;background:var(--primary);color:#fff}
.badge-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary)}
.tag{display:inline-block;padding:4px 12px;border-radius:var(--radius-xs);font-size:0.8rem;background:rgba(230,57,70,0.08);color:var(--primary);font-weight:500;transition:var(--transition)}
.tag:hover{background:var(--primary);color:#fff}
/* === Header / Nav === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(255,255,255,0.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(0,0,0,0.04);box-shadow:0 2px 20px rgba(0,0,0,0.04);transition:var(--transition)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:800;color:var(--secondary);letter-spacing:-0.5px;flex-shrink:0}
.logo i{color:var(--primary);font-size:1.6rem}
.logo span{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-tabs{display:flex;align-items:center;gap:6px;background:rgba(230,57,70,0.06);padding:4px;border-radius:50px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
.nav-tabs::-webkit-scrollbar{display:none}
.nav-tab{display:flex;align-items:center;gap:8px;padding:10px 22px;border-radius:50px;font-size:0.95rem;font-weight:600;color:var(--text-light);white-space:nowrap;transition:var(--transition);position:relative}
.nav-tab i{font-size:1rem}
.nav-tab:hover{color:var(--primary);background:rgba(230,57,70,0.08)}
.nav-tab.active{background:var(--primary);color:#fff;box-shadow:0 4px 15px rgba(230,57,70,0.3)}
.nav-tab.active:hover{background:var(--primary-dark);color:#fff}
.header-cta{display:flex;align-items:center;gap:12px;flex-shrink:0}
.header-cta .btn{padding:10px 24px;font-size:0.9rem}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px;background:none;border:none}
.mobile-toggle span{display:block;width:28px;height:3px;background:var(--secondary);border-radius:4px;transition:var(--transition)}
/* === Hero / Banner === */
.page-banner{position:relative;padding:140px 0 80px;background:linear-gradient(135deg,var(--secondary) 0%,var(--secondary-light) 100%);overflow:hidden;margin-top:0}
.page-banner::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.15;mix-blend-mode:overlay}
.page-banner::after{content:'';position:absolute;inset:0;background:radial-gradient(circle at 30% 40%,rgba(230,57,70,0.25),transparent 60%)}
.banner-content{position:relative;z-index:2;text-align:center}
.banner-content h1{font-size:2.4rem;font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:-0.5px;line-height:1.25;text-shadow:0 2px 20px rgba(0,0,0,0.15)}
.banner-content .bread{display:flex;align-items:center;justify-content:center;gap:10px;font-size:0.95rem;color:rgba(255,255,255,0.75);margin-bottom:12px;flex-wrap:wrap}
.banner-content .bread a{color:rgba(255,255,255,0.85)}
.banner-content .bread a:hover{color:#fff}
.banner-content .bread span{color:rgba(255,255,255,0.5)}
.banner-meta{display:flex;align-items:center;justify-content:center;gap:20px;color:rgba(255,255,255,0.8);font-size:0.9rem;flex-wrap:wrap}
.banner-meta i{margin-right:6px;color:var(--accent)}
/* === Article Main === */
.article-main{padding:60px 0 80px}
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start}
.article-body{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px;overflow:hidden}
.article-body .content{font-size:1.05rem;line-height:1.9;color:var(--text)}
.article-body .content p{margin-bottom:1.4em}
.article-body .content h2{font-size:1.5rem;font-weight:700;margin:1.6em 0 0.6em;color:var(--secondary);padding-bottom:8px;border-bottom:2px solid rgba(230,57,70,0.12)}
.article-body .content h3{font-size:1.2rem;font-weight:700;margin:1.4em 0 0.5em;color:var(--secondary)}
.article-body .content ul,.article-body .content ol{padding-left:1.6em;margin-bottom:1.2em}
.article-body .content li{margin-bottom:0.4em;list-style:disc}
.article-body .content ol li{list-style:decimal}
.article-body .content a{color:var(--primary);font-weight:600;border-bottom:1px solid transparent}
.article-body .content a:hover{border-bottom-color:var(--primary)}
.article-body .content strong{color:var(--secondary)}
.article-body .content img{border-radius:var(--radius-sm);margin:1.6em auto;box-shadow:var(--shadow)}
.article-body .content blockquote{border-left:4px solid var(--primary);background:rgba(230,57,70,0.04);padding:16px 24px;margin:1.4em 0;border-radius:0 var(--radius-xs) var(--radius-xs) 0;color:var(--text-light);font-style:italic}
.article-body .content code{background:rgba(0,0,0,0.05);padding:2px 10px;border-radius:var(--radius-xs);font-size:0.92em;color:var(--primary)}
.article-body .content pre{background:var(--secondary);color:var(--text-white);padding:20px;border-radius:var(--radius-sm);overflow-x:auto;margin:1.4em 0;font-size:0.92rem}
.article-body .content pre code{background:transparent;color:inherit;padding:0}
.article-footer-bar{display:flex;align-items:center;justify-content:space-between;margin-top:40px;padding-top:24px;border-top:1px solid var(--border);flex-wrap:wrap;gap:16px}
.article-footer-bar .tags{display:flex;flex-wrap:wrap;gap:8px}
.article-nav{display:flex;justify-content:space-between;margin-top:40px;padding-top:24px;border-top:1px solid var(--border);gap:20px;flex-wrap:wrap}
.article-nav a{display:flex;align-items:center;gap:10px;padding:12px 20px;border-radius:var(--radius-sm);background:var(--bg);color:var(--text);font-weight:500;transition:var(--transition);flex:1;min-width:180px}
.article-nav a:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.article-nav .next{justify-content:flex-end;text-align:right}
/* === Sidebar === */
.article-sidebar{display:flex;flex-direction:column;gap:28px}
.sidebar-card{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.sidebar-card h3{font-size:1.1rem;font-weight:700;color:var(--secondary);margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid rgba(230,57,70,0.1);display:flex;align-items:center;gap:8px}
.sidebar-card h3 i{color:var(--primary)}
.sidebar-list li{border-bottom:1px solid var(--border);padding:10px 0}
.sidebar-list li:last-child{border-bottom:none}
.sidebar-list a{display:flex;align-items:flex-start;gap:12px;color:var(--text);font-size:0.92rem;transition:var(--transition)}
.sidebar-list a:hover{color:var(--primary)}
.sidebar-list a .num{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:rgba(230,57,70,0.08);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:0.78rem;font-weight:700}
.sidebar-list a:hover .num{background:var(--primary);color:#fff}
.sidebar-cta{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;text-align:center;padding:32px 24px}
.sidebar-cta h3{color:#fff;border-bottom-color:rgba(255,255,255,0.2)}
.sidebar-cta p{font-size:0.92rem;opacity:0.9;margin-bottom:18px}
.sidebar-cta .btn{background:#fff;color:var(--primary);border-color:#fff}
.sidebar-cta .btn:hover{background:transparent;color:#fff;border-color:#fff}
/* === FAQ === */
.faq-section{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px;margin-top:20px}
.faq-section h2{font-size:1.5rem;font-weight:700;color:var(--secondary);margin-bottom:24px;text-align:center}
.faq-item{border-bottom:1px solid var(--border);padding:16px 0}
.faq-item:last-child{border-bottom:none}
.faq-q{display:flex;align-items:center;gap:12px;font-weight:600;color:var(--secondary);cursor:pointer;font-size:1rem}
.faq-q i{color:var(--primary);font-size:0.85rem;transition:var(--transition)}
.faq-q.open i{transform:rotate(180deg)}
.faq-a{padding:12px 0 4px 28px;color:var(--text-light);font-size:0.95rem;line-height:1.7;display:none}
.faq-a.show{display:block}
/* === Footer === */
.site-footer{background:var(--bg-dark);color:rgba(255,255,255,0.75);padding:60px 0 30px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.footer-brand h3{font-size:1.3rem;font-weight:800;color:#fff;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.footer-brand h3 i{color:var(--accent)}
.footer-brand p{font-size:0.92rem;line-height:1.7;color:rgba(255,255,255,0.6)}
.footer-col h4{font-size:1rem;font-weight:700;color:#fff;margin-bottom:16px;position:relative;padding-bottom:8px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:32px;height:2px;background:var(--primary);border-radius:2px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{color:rgba(255,255,255,0.6);font-size:0.9rem;transition:var(--transition)}
.footer-col ul 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;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;font-size:0.85rem;color:rgba(255,255,255,0.45)}
.footer-bottom a{color:rgba(255,255,255,0.55)}
.footer-bottom a:hover{color:var(--accent)}
/* === 响应式 === */
@media(max-width:1024px){
  .article-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .grid-3,.grid-4{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .mobile-toggle{display:flex}
  .nav-tabs{position:fixed;top:var(--nav-h);left:0;width:100%;background:rgba(255,255,255,0.98);backdrop-filter:blur(20px);padding:12px 20px;border-radius:0;box-shadow:0 8px 30px rgba(0,0,0,0.08);flex-direction:column;gap:4px;display:none;z-index:999;max-height:60vh;overflow-y:auto}
  .nav-tabs.open{display:flex}
  .nav-tab{width:100%;justify-content:flex-start;padding:12px 20px;border-radius:var(--radius-sm)}
  .header-cta .btn{display:none}
  .page-banner{padding:120px 0 60px}
  .banner-content h1{font-size:1.7rem}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .section{padding:50px 0}
  .section-title{font-size:1.5rem}
  .article-body{padding:24px}
  .faq-section{padding:24px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;text-align:center}
  .article-nav{flex-direction:column}
  .article-nav a{text-align:center;justify-content:center}
}
@media(max-width:520px){
  .banner-content h1{font-size:1.4rem}
  .banner-meta{gap:10px;font-size:0.82rem}
  .article-body{padding:16px}
  .article-body .content{font-size:0.95rem}
  .sidebar-card{padding:18px}
  .btn{padding:12px 24px;font-size:0.9rem}
  .container{padding:0 14px}
}
.not-found{text-align:center;padding:60px 20px}
.not-found h2{font-size:2rem;color:var(--primary);margin-bottom:16px}
.not-found p{color:var(--text-light);margin-bottom:24px}