/* roulang page: index */
:root {
            --primary: #0f2b46;
            --primary-light: #1a4470;
            --primary-dark: #091d33;
            --accent: #c8943e;
            --accent-light: #e0b865;
            --accent-dark: #a0752e;
            --bg-white: #ffffff;
            --bg-light: #f5f6f8;
            --bg-gray: #eef0f3;
            --bg-dark: #0b1e33;
            --text-primary: #1a1d23;
            --text-secondary: #5a5f6b;
            --text-muted: #8b909c;
            --text-light: #bcc2cd;
            --text-on-dark: #e8eaef;
            --border-default: #dee2e8;
            --border-light: #eef0f4;
            --shadow-sm: 0 1px 3px rgba(15, 27, 46, 0.06);
            --shadow-md: 0 4px 16px rgba(15, 27, 46, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 27, 46, 0.12);
            --shadow-xl: 0 20px 60px rgba(15, 27, 46, 0.16);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --max-width: 1240px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-white);
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }

        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 768px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ========== 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .site-header .navbar {
            width: 100%;
            padding: 0;
            min-height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .site-header .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .navbar-brand-custom {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary) !important;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }
        .navbar-brand-custom .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .navbar-brand-custom:hover {
            color: var(--primary-light) !important;
        }
        .navbar-nav-custom {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .navbar-nav-custom .nav-item {
            position: relative;
        }
        .navbar-nav-custom .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-full);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .navbar-nav-custom .nav-link:hover {
            color: var(--primary);
            background: var(--bg-gray);
        }
        .navbar-nav-custom .nav-link.active {
            color: var(--primary);
            background: #e8edf5;
            font-weight: 600;
        }
        .nav-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 20px;
            letter-spacing: 0.04em;
            line-height: 1.4;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff !important;
            background: var(--accent);
            border-radius: var(--radius-full);
            transition: all var(--transition-fast);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }
        .nav-cta-btn:hover {
            background: var(--accent-dark);
            color: #fff !important;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .navbar-toggler-custom {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 8px;
        }
        @media (max-width: 992px) {
            .navbar-toggler-custom {
                display: block;
            }
            .navbar-collapse-custom {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border-default);
                box-shadow: var(--shadow-lg);
                padding: 16px 24px;
                flex-direction: column;
                gap: 4px;
                z-index: 1049;
            }
            .navbar-collapse-custom.show {
                display: flex;
            }
            .navbar-nav-custom {
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
            }
            .navbar-nav-custom .nav-link {
                padding: 12px 16px;
                border-radius: var(--radius-md);
            }
            .nav-cta-btn {
                margin-top: 10px;
                justify-content: center;
            }
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 72px 0;
        }
        .section-sm {
            padding: 48px 0;
        }
        .section-lg {
            padding: 96px 0;
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-on-dark);
        }
        .section-light {
            background: var(--bg-light);
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.01em;
            line-height: 1.3;
        }
        .section-title-light {
            color: #fff;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.75;
        }
        .section-desc-light {
            color: var(--text-light);
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-lg {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.65rem;
            }
            .section-desc {
                font-size: 0.95rem;
            }
        }

        /* ========== Hero ========== */
        .hero-section {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0b1e33 0%, #0f2b46 40%, #122f4d 100%);
            overflow: hidden;
            color: #fff;
        }
        .hero-bg-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.32;
            pointer-events: none;
            z-index: 1;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(200, 148, 62, 0.12) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 40%, rgba(26, 68, 112, 0.35) 0%, transparent 55%);
            z-index: 2;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            padding: 60px 0;
        }
        .hero-content h1 {
            font-size: 2.9rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: 0.01em;
            margin-bottom: 18px;
            color: #fff;
        }
        .hero-content h1 .highlight {
            color: var(--accent-light);
        }
        .hero-content .hero-subtitle {
            font-size: 1.2rem;
            color: #d0d6e0;
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 32px;
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background: var(--accent);
            border-radius: var(--radius-full);
            border: none;
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .btn-hero-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(200, 148, 62, 0.35);
            color: #fff;
        }
        .btn-hero-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.35);
            border-radius: var(--radius-full);
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .btn-hero-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 36px;
            margin-top: 44px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-stat-item .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-light);
            line-height: 1.1;
        }
        .hero-stat-item .stat-label {
            font-size: 0.85rem;
            color: #bcc2d0;
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero-section {
                min-height: auto;
            }
            .hero-content h1 {
                font-size: 1.9rem;
            }
            .hero-content .hero-subtitle {
                font-size: 1rem;
            }
            .hero-stats-row {
                gap: 20px;
            }
            .hero-stat-item .stat-number {
                font-size: 1.5rem;
            }
        }

        /* ========== 分类入口卡片 ========== */
        .category-cards-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        @media (max-width: 768px) {
            .category-cards-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: #fff;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            cursor: pointer;
            text-decoration: none;
            color: inherit;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
            color: inherit;
        }
        .category-card-img-wrap {
            position: relative;
            height: 240px;
            overflow: hidden;
        }
        .category-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .category-card:hover .category-card-img-wrap img {
            transform: scale(1.06);
        }
        .category-card-img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 27, 46, 0.55) 0%, transparent 50%);
            pointer-events: none;
        }
        .category-card-body {
            padding: 24px 28px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .category-card-title {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .category-card-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.65;
            flex: 1;
        }
        .category-card-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 16px;
            font-size: 0.9rem;
            transition: gap var(--transition-fast);
        }
        .category-card:hover .category-card-arrow {
            gap: 10px;
            color: var(--accent);
        }

        /* ========== 最新信息列表 ========== */
        .info-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 992px) {
            .info-list-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 600px) {
            .info-list-grid {
                grid-template-columns: 1fr;
            }
        }
        .info-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            text-decoration: none;
            color: inherit;
        }
        .info-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--border-default);
            transform: translateY(-3px);
            color: inherit;
        }
        .info-card .info-category-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            color: var(--accent);
            background: #fdf6ea;
            padding: 3px 10px;
            border-radius: 20px;
            margin-bottom: 10px;
            width: fit-content;
        }
        .info-card .info-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 8px;
        }
        .info-card .info-summary {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .info-card .info-time {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 14px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .info-empty-state {
            text-align: center;
            padding: 48px 24px;
            color: var(--text-muted);
            font-size: 1rem;
            grid-column: 1 / -1;
        }

        /* ========== 优势特色 ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 992px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .feature-icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: #eef3fa;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: all var(--transition-base);
        }
        .feature-card:hover .feature-icon-wrap {
            background: var(--primary);
            color: #fff;
        }
        .feature-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== 社会认同 ========== */
        .trust-strip {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 40px;
            padding: 20px 0;
        }
        .trust-item {
            text-align: center;
        }
        .trust-item .trust-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
        }
        .trust-item .trust-label {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .trust-strip {
                gap: 24px;
            }
            .trust-item .trust-num {
                font-size: 1.8rem;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 20px 0;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            gap: 16px;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--bg-gray);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }
        .faq-item:hover .faq-icon {
            background: var(--accent);
            color: #fff;
        }
        .faq-answer {
            display: none;
            padding-top: 12px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 680px;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            color: #fff;
            text-align: center;
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 30%, rgba(200, 148, 62, 0.18) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-section .container-custom {
            position: relative;
            z-index: 1;
        }
        .cta-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-desc {
            font-size: 1.05rem;
            color: #d0d6e0;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .btn-cta-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 16px 40px;
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            background: var(--accent);
            border-radius: var(--radius-full);
            border: none;
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .btn-cta-lg:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 16px 40px rgba(200, 148, 62, 0.4);
            color: #fff;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 48px 0 28px;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        .footer-brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-desc {
            color: var(--text-light);
            line-height: 1.7;
            max-width: 380px;
        }
        .footer-col-title {
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            color: #fff;
            margin-bottom: 14px;
            text-transform: uppercase;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            color: var(--text-light);
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 24px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ========== 按钮通用 ========== */
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            border: 2px solid var(--primary);
            border-radius: var(--radius-full);
            background: transparent;
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ========== 工具类 ========== */
        .text-center {
            text-align: center;
        }
        .mt-0 {
            margin-top: 0;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mt-4 {
            margin-top: 36px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }
        .mb-4 {
            margin-bottom: 36px;
        }
        .gap-2 {
            gap: 12px;
        }
        .d-flex {
            display: flex;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .align-center {
            align-items: center;
        }
        .justify-center {
            justify-content: center;
        }

/* roulang page: category1 */
:root {
            --color-primary: #0d2b45;
            --color-primary-light: #1a3f5f;
            --color-accent: #e8871e;
            --color-accent-hover: #c97218;
            --color-accent-light: #fff7ed;
            --color-surface: #ffffff;
            --color-bg: #f6f8fb;
            --color-bg-alt: #edf1f7;
            --color-text: #1e293b;
            --color-text-soft: #5a6b7c;
            --color-text-muted: #8494a5;
            --color-border: #dce3eb;
            --color-border-light: #eaeff5;
            --color-success: #16a34a;
            --color-warning: #f59e0b;
            --color-info: #0ea5e9;
            --color-danger: #dc2626;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(13, 43, 69, 0.06), 0 1px 2px rgba(13, 43, 69, 0.04);
            --shadow-md: 0 4px 16px rgba(13, 43, 69, 0.08), 0 2px 6px rgba(13, 43, 69, 0.04);
            --shadow-lg: 0 12px 32px rgba(13, 43, 69, 0.12), 0 4px 12px rgba(13, 43, 69, 0.06);
            --shadow-xl: 0 20px 48px rgba(13, 43, 69, 0.16), 0 8px 20px rgba(13, 43, 69, 0.08);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-stack: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --section-gap: 80px;
            --container-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

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

        button {
            font-family: inherit;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 768px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            :root {
                --section-gap: 52px;
            }
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: var(--shadow-sm);
        }
        .site-header .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 20px;
        }
        .navbar-brand-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.22rem;
            color: var(--color-primary);
            white-space: nowrap;
            letter-spacing: 0.01em;
            transition: opacity var(--transition-fast);
        }
        .navbar-brand-custom:hover {
            opacity: 0.82;
            color: var(--color-primary);
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            flex-shrink: 0;
        }
        .navbar-toggler-custom {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-primary);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .navbar-toggler-custom:hover {
            background: var(--color-bg-alt);
        }
        .navbar-collapse-custom {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-nav-custom {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 6px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.94rem;
            font-weight: 500;
            color: var(--color-text-soft);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-link:hover {
            color: var(--color-primary);
            background: var(--color-bg-alt);
        }
        .nav-link.active {
            color: var(--color-primary);
            background: var(--color-bg-alt);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 16px;
            right: 16px;
            height: 2.5px;
            background: var(--color-accent);
            border-radius: 2px;
        }
        .nav-badge {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 7px;
            border-radius: 20px;
            background: #fef2e7;
            color: var(--color-accent);
            letter-spacing: 0.03em;
            line-height: 1.4;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: 50px;
            font-size: 0.92rem;
            font-weight: 600;
            background: var(--color-accent);
            color: #fff;
            white-space: nowrap;
            transition: all var(--transition-base);
            box-shadow: 0 2px 10px rgba(232, 135, 30, 0.28);
            letter-spacing: 0.02em;
        }
        .nav-cta-btn:hover {
            background: var(--color-accent-hover);
            color: #fff;
            box-shadow: 0 4px 18px rgba(232, 135, 30, 0.4);
            transform: translateY(-1px);
        }
        @media (max-width: 992px) {
            .navbar-toggler-custom {
                display: block;
            }
            .navbar-collapse-custom {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--color-surface);
                border-bottom: 2px solid var(--color-border);
                flex-direction: column;
                padding: 16px 24px 20px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                z-index: 1040;
            }
            .navbar-collapse-custom.show {
                display: flex;
            }
            .navbar-nav-custom {
                flex-direction: column;
                width: 100%;
                gap: 2px;
            }
            .nav-link {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-cta-btn {
                width: 100%;
                justify-content: center;
                margin-top: 8px;
                padding: 13px 22px;
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .site-header .container-custom {
                height: 56px;
            }
            .navbar-brand-custom {
                font-size: 1.05rem;
                gap: 7px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 0.75rem;
            }
            .navbar-toggler-custom {
                font-size: 1.3rem;
            }
            .navbar-collapse-custom {
                top: 56px;
            }
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
            letter-spacing: 0.01em;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1.08rem;
            color: var(--color-text-soft);
            max-width: 680px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.96rem;
            }
        }

        /* ========== HERO ========== */
        .hero-category {
            position: relative;
            background: linear-gradient(170deg, #0a1f33 0%, #0d2b45 40%, #122b4a 100%);
            color: #fff;
            padding: 90px 0 100px;
            overflow: hidden;
            min-height: 440px;
            display: flex;
            align-items: center;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 40%;
            opacity: 0.22;
            z-index: 0;
        }
        .hero-category::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60%;
            background: linear-gradient(to top, rgba(10, 31, 51, 0.7) 0%, transparent 100%);
            z-index: 1;
        }
        .hero-category .container-custom {
            position: relative;
            z-index: 2;
        }
        .hero-category .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.22);
            padding: 7px 18px;
            border-radius: 50px;
            font-size: 0.88rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            margin-bottom: 22px;
            color: #fde8c8;
        }
        .hero-category .hero-badge i {
            color: var(--color-accent);
        }
        .hero-category h1 {
            font-size: 2.9rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            line-height: 1.22;
            margin-bottom: 18px;
            color: #fff;
        }
        .hero-category .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.82);
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 30px;
        }
        .hero-category .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1.02rem;
            font-weight: 700;
            background: var(--color-accent);
            color: #fff;
            border: none;
            transition: all var(--transition-base);
            box-shadow: 0 6px 22px rgba(232, 135, 30, 0.36);
            letter-spacing: 0.02em;
            cursor: pointer;
        }
        .btn-hero-primary:hover {
            background: #f0962c;
            color: #fff;
            box-shadow: 0 8px 28px rgba(232, 135, 30, 0.5);
            transform: translateY(-2px);
        }
        .btn-hero-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1.02rem;
            font-weight: 600;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
            transition: all var(--transition-base);
            letter-spacing: 0.02em;
            cursor: pointer;
        }
        .btn-hero-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.8);
            color: #fff;
        }
        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 36px;
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.18);
        }
        .hero-stat-item .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.1;
        }
        .hero-stat-item .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 2px;
        }
        @media (max-width: 768px) {
            .hero-category {
                padding: 56px 0 64px;
                min-height: auto;
            }
            .hero-category h1 {
                font-size: 2rem;
            }
            .hero-category .hero-desc {
                font-size: 1rem;
            }
            .hero-stats-row {
                gap: 20px;
                margin-top: 28px;
                padding-top: 20px;
            }
            .hero-stat-item .stat-number {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero-category h1 {
                font-size: 1.55rem;
            }
            .hero-category .hero-desc {
                font-size: 0.94rem;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                width: 100%;
                justify-content: center;
                padding: 13px 24px;
                font-size: 0.96rem;
            }
            .hero-stats-row {
                gap: 14px;
            }
            .hero-stat-item .stat-number {
                font-size: 1.3rem;
            }
        }

        /* ========== ADVANTAGE CARDS ========== */
        .section-advantages {
            background: var(--color-surface);
        }
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .advantage-card {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            text-align: center;
        }
        .advantage-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: transparent;
            transform: translateY(-3px);
            background: #fff;
        }
        .advantage-card .adv-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 58px;
            height: 58px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            color: #fff;
            font-size: 1.5rem;
            margin-bottom: 18px;
        }
        .advantage-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
        }
        .advantage-card p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            margin: 0;
            line-height: 1.6;
        }
        @media (max-width: 992px) {
            .advantage-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 520px) {
            .advantage-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .advantage-card {
                padding: 24px 18px;
            }
        }

        /* ========== ROUTE SHOWCASE ========== */
        .section-routes {
            background: var(--color-bg);
        }
        .route-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .route-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
        }
        .route-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .route-card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .route-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .route-card:hover .route-card-img img {
            transform: scale(1.04);
        }
        .route-card-body {
            padding: 22px 20px;
        }
        .route-card-body h4 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 6px;
        }
        .route-card-body .route-meta {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 8px;
        }
        .route-card-body .route-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .route-card-body .route-meta i {
            color: var(--color-accent);
            font-size: 0.75rem;
        }
        .route-card-body p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            margin: 0;
            line-height: 1.6;
        }
        .route-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 20px;
            background: #e8f4fd;
            color: #0d5f8a;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        @media (max-width: 992px) {
            .route-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 600px) {
            .route-grid {
                grid-template-columns: 1fr;
            }
            .route-card-img {
                height: 180px;
            }
        }

        /* ========== DATA METRICS ========== */
        .section-metrics {
            background: var(--color-primary);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .section-metrics::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.1;
        }
        .section-metrics .container-custom {
            position: relative;
            z-index: 1;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 36px;
        }
        .metric-item {
            text-align: center;
            padding: 30px 20px;
            background: rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.12);
            transition: all var(--transition-base);
            backdrop-filter: blur(4px);
        }
        .metric-item:hover {
            background: rgba(255, 255, 255, 0.13);
            border-color: rgba(255, 255, 255, 0.25);
        }
        .metric-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.1;
            letter-spacing: 0.01em;
        }
        .metric-unit {
            font-size: 1rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.7);
        }
        .metric-label {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 6px;
            letter-spacing: 0.02em;
        }
        .section-metrics .section-title {
            color: #fff;
        }
        .section-metrics .section-subtitle {
            color: rgba(255, 255, 255, 0.75);
        }
        @media (max-width: 768px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .metric-number {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 480px) {
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .metric-item {
                padding: 20px 14px;
            }
            .metric-number {
                font-size: 1.8rem;
            }
        }

        /* ========== PROCESS STEPS ========== */
        .section-process {
            background: var(--color-surface);
        }
        .process-steps {
            display: flex;
            gap: 0;
            margin-top: 44px;
            position: relative;
            flex-wrap: nowrap;
            overflow-x: auto;
            padding-bottom: 10px;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 40px;
            right: 40px;
            height: 3px;
            background: var(--color-border);
            border-radius: 2px;
            z-index: 0;
        }
        .process-step {
            flex: 1;
            min-width: 160px;
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 12px;
        }
        .step-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--color-surface);
            border: 3px solid var(--color-border);
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 16px;
            transition: all var(--transition-base);
            position: relative;
        }
        .process-step:hover .step-circle {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 10px rgba(232, 135, 30, 0.08);
            color: var(--color-accent);
        }
        .process-step h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 4px;
        }
        .process-step p {
            font-size: 0.84rem;
            color: var(--color-text-soft);
            margin: 0;
            line-height: 1.5;
        }
        @media (max-width: 768px) {
            .process-steps {
                flex-wrap: wrap;
                gap: 24px;
                justify-content: center;
            }
            .process-steps::before {
                display: none;
            }
            .process-step {
                flex: 0 0 auto;
                min-width: 130px;
                max-width: 160px;
            }
        }

        /* ========== SCENARIOS ========== */
        .section-scenarios {
            background: var(--color-bg);
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .scenario-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: transparent;
            transform: translateY(-3px);
        }
        .scenario-card .sc-icon {
            font-size: 2rem;
            color: var(--color-accent);
        }
        .scenario-card h4 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0;
        }
        .scenario-card p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            margin: 0;
            line-height: 1.6;
        }
        @media (max-width: 992px) {
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .scenario-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FAQ ========== */
        .section-faq {
            background: var(--color-surface);
        }
        .faq-wrapper {
            max-width: 800px;
            margin: 40px auto 0;
        }
        .faq-item {
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background: #fff;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            background: none;
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background var(--transition-fast);
        }
        .faq-question:hover {
            background: var(--color-bg);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-fast);
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(45deg);
            color: var(--color-accent);
        }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.94rem;
            color: var(--color-text-soft);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 15px 16px;
                font-size: 0.94rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.88rem;
            }
        }

        /* ========== CTA ========== */
        .section-cta {
            background: linear-gradient(160deg, var(--color-primary) 0%, #0f3555 60%, #113b5e 100%);
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .section-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 0;
        }
        .section-cta .container-custom {
            position: relative;
            z-index: 1;
        }
        .cta-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.16);
            border-radius: var(--radius-xl);
            padding: 48px 36px;
            backdrop-filter: blur(8px);
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-card h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .cta-card p {
            font-size: 1.04rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .cta-card .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 15px 38px;
            border-radius: 50px;
            font-size: 1.06rem;
            font-weight: 700;
            background: var(--color-accent);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 8px 28px rgba(232, 135, 30, 0.4);
            letter-spacing: 0.02em;
        }
        .cta-card .btn-cta-large:hover {
            background: #f0962c;
            box-shadow: 0 10px 34px rgba(232, 135, 30, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }
        @media (max-width: 520px) {
            .cta-card {
                padding: 32px 18px;
            }
            .cta-card h2 {
                font-size: 1.5rem;
            }
            .cta-card .btn-cta-large {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0a1a2a;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 32px;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }
        .footer-desc {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.6;
            margin: 0;
        }
        .footer-col-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }
        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
            letter-spacing: 0.02em;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            .footer-links {
                align-items: center;
            }
        }

        /* ========== UTILITY ========== */
        .text-accent {
            color: var(--color-accent);
        }
        .fw-800 {
            font-weight: 800;
        }

/* roulang page: article */
:root {
            --brand-deep: #0a0f24;
            --brand-navy: #111b3d;
            --brand-blue: #1e40af;
            --brand-accent: #3b82f6;
            --brand-glow: #60a5fa;
            --brand-cta: #f59e0b;
            --brand-cta-hover: #d97706;
            --brand-surface: #ffffff;
            --brand-bg: #f1f5f9;
            --brand-bg-alt: #e2e8f0;
            --brand-text: #1e293b;
            --brand-text-soft: #475569;
            --brand-text-muted: #94a3b8;
            --brand-border: #cbd5e1;
            --brand-border-light: #e2e8f0;
            --brand-shadow-sm: 0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);
            --brand-shadow: 0 4px 16px rgba(0,0,0,.08),0 2px 4px rgba(0,0,0,.04);
            --brand-shadow-lg: 0 12px 32px rgba(0,0,0,.10),0 4px 10px rgba(0,0,0,.05);
            --brand-radius-sm: 6px;
            --brand-radius: 10px;
            --brand-radius-lg: 16px;
            --brand-radius-xl: 20px;
            --brand-transition: 0.2s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--brand-text);
            background-color: var(--brand-bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--brand-accent);
            text-decoration: none;
            transition: color var(--brand-transition);
        }
        a:hover {
            color: var(--brand-blue);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }

        .container-custom {
            width: 100%;
            max-width: 1260px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 768px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Header */
        .site-header {
            background: var(--brand-navy);
            border-bottom: 2px solid rgba(255,255,255,.08);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: 0 2px 12px rgba(0,0,0,.18);
        }
        .site-header .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .navbar-brand-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            text-decoration: none;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .navbar-brand-custom:hover {
            color: var(--brand-glow);
            text-decoration: none;
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--brand-accent), var(--brand-blue));
            color: #fff;
            font-weight: 800;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .navbar-toggler-custom {
            display: none;
            background: none;
            border: 1px solid rgba(255,255,255,.25);
            color: #ffffff;
            font-size: 1.4rem;
            padding: 6px 12px;
            border-radius: var(--brand-radius-sm);
            cursor: pointer;
            transition: background var(--brand-transition);
        }
        .navbar-toggler-custom:hover {
            background: rgba(255,255,255,.08);
        }
        .navbar-collapse-custom {
            display: flex;
            align-items: center;
        }
        .navbar-nav-custom {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 6px;
        }
        .nav-item {
            position: relative;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--brand-radius-sm);
            color: rgba(255,255,255,.82);
            font-weight: 500;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all var(--brand-transition);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: #ffffff;
            background: rgba(255,255,255,.07);
            text-decoration: none;
        }
        .nav-link.active {
            color: #ffffff;
            background: rgba(59,130,246,.25);
            font-weight: 600;
        }
        .nav-badge {
            display: inline-block;
            font-size: 0.68rem;
            padding: 2px 7px;
            border-radius: 20px;
            background: #ef4444;
            color: #fff;
            font-weight: 600;
            letter-spacing: 0.3px;
            animation: badgePulse 2s ease-in-out infinite;
        }
        @keyframes badgePulse {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            border-radius: 24px;
            background: linear-gradient(135deg, var(--brand-cta), #e69009);
            color: #1a1a1a;
            font-weight: 600;
            font-size: 0.92rem;
            text-decoration: none;
            transition: all var(--brand-transition);
            box-shadow: 0 2px 8px rgba(245,158,11,.35);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            background: linear-gradient(135deg, #fbbf24, var(--brand-cta-hover));
            color: #0f0f0f;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(245,158,11,.45);
        }
        @media (max-width: 768px) {
            .navbar-toggler-custom {
                display: block;
            }
            .navbar-collapse-custom {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--brand-navy);
                flex-direction: column;
                padding: 16px 0;
                border-top: 1px solid rgba(255,255,255,.1);
                box-shadow: 0 8px 20px rgba(0,0,0,.25);
            }
            .navbar-collapse-custom.open {
                display: flex;
            }
            .navbar-nav-custom {
                flex-direction: column;
                width: 100%;
                gap: 2px;
                padding: 0 16px;
            }
            .nav-link {
                width: 100%;
                padding: 12px 16px;
            }
            .nav-cta-btn {
                margin-top: 6px;
                width: 100%;
                justify-content: center;
            }
        }

        /* Breadcrumb */
        .breadcrumb-section {
            background: #ffffff;
            border-bottom: 1px solid var(--brand-border-light);
            padding: 14px 0;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            font-size: 0.9rem;
            color: var(--brand-text-soft);
        }
        .breadcrumb-custom li {
            display: inline-flex;
            align-items: center;
        }
        .breadcrumb-custom a {
            color: var(--brand-text-soft);
            text-decoration: none;
            transition: color var(--brand-transition);
        }
        .breadcrumb-custom a:hover {
            color: var(--brand-accent);
            text-decoration: none;
        }
        .breadcrumb-custom .separator {
            margin: 0 4px;
            color: var(--brand-text-muted);
            user-select: none;
        }
        .breadcrumb-custom .current {
            color: var(--brand-text);
            font-weight: 500;
        }

        /* Article main layout */
        .article-main {
            padding: 40px 0 60px;
        }
        .article-grid {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 32px;
            align-items: start;
        }
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Article content card */
        .article-card {
            background: #ffffff;
            border-radius: var(--brand-radius-lg);
            box-shadow: var(--brand-shadow);
            overflow: hidden;
        }
        .article-featured-image {
            width: 100%;
            aspect-ratio: 16 / 7;
            object-fit: cover;
            display: block;
            background: var(--brand-bg-alt);
        }
        .article-body {
            padding: 36px 40px 44px;
        }
        @media (max-width: 768px) {
            .article-body {
                padding: 24px 20px 32px;
            }
        }
        .article-meta-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .article-category-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 600;
            background: rgba(59,130,246,.1);
            color: var(--brand-blue);
            text-decoration: none;
            transition: all var(--brand-transition);
        }
        .article-category-tag:hover {
            background: rgba(59,130,246,.2);
            text-decoration: none;
            color: var(--brand-blue);
        }
        .article-date {
            font-size: 0.85rem;
            color: var(--brand-text-muted);
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .article-h1 {
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--brand-deep);
            line-height: 1.4;
            margin: 0 0 24px;
            letter-spacing: 0.3px;
        }
        @media (max-width: 768px) {
            .article-h1 {
                font-size: 1.45rem;
            }
        }
        .article-content {
            font-size: 1.02rem;
            line-height: 1.85;
            color: var(--brand-text);
            word-break: break-word;
        }
        .article-content h2 {
            font-size: 1.35rem;
            font-weight: 700;
            margin: 32px 0 14px;
            color: var(--brand-deep);
            padding-bottom: 8px;
            border-bottom: 2px solid var(--brand-border-light);
        }
        .article-content h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 24px 0 10px;
            color: var(--brand-navy);
        }
        .article-content p {
            margin: 0 0 16px;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 16px;
            padding-left: 22px;
        }
        .article-content li {
            margin-bottom: 6px;
        }
        .article-content img {
            border-radius: var(--brand-radius);
            margin: 20px 0;
            max-width: 100%;
            height: auto;
        }
        .article-content blockquote {
            border-left: 4px solid var(--brand-accent);
            background: var(--brand-bg);
            padding: 16px 20px;
            margin: 20px 0;
            border-radius: 0 var(--brand-radius-sm) var(--brand-radius-sm) 0;
            color: var(--brand-text-soft);
            font-style: italic;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 0.95rem;
        }
        .article-content table th,
        .article-content table td {
            border: 1px solid var(--brand-border-light);
            padding: 10px 14px;
            text-align: left;
        }
        .article-content table th {
            background: var(--brand-bg);
            font-weight: 600;
            color: var(--brand-navy);
        }

        /* Not found state */
        .article-not-found {
            text-align: center;
            padding: 60px 30px;
            color: var(--brand-text-soft);
        }
        .article-not-found .not-found-icon {
            font-size: 3.5rem;
            color: var(--brand-text-muted);
            margin-bottom: 16px;
        }
        .article-not-found h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--brand-text);
            margin-bottom: 8px;
        }
        .article-not-found .back-home-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 20px;
            padding: 10px 24px;
            border-radius: 24px;
            background: var(--brand-accent);
            color: #fff;
            font-weight: 600;
            text-decoration: none;
            transition: all var(--brand-transition);
        }
        .article-not-found .back-home-btn:hover {
            background: var(--brand-blue);
            color: #fff;
            text-decoration: none;
            transform: translateY(-2px);
            box-shadow: var(--brand-shadow-lg);
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-card {
            background: #ffffff;
            border-radius: var(--brand-radius-lg);
            box-shadow: var(--brand-shadow-sm);
            padding: 24px;
        }
        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--brand-deep);
            margin: 0 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--brand-border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--brand-accent);
            font-size: 1rem;
        }
        .sidebar-service-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: var(--brand-radius);
            text-decoration: none;
            color: var(--brand-text);
            transition: all var(--brand-transition);
            margin-bottom: 6px;
            border: 1px solid transparent;
        }
        .sidebar-service-item:hover {
            background: var(--brand-bg);
            border-color: var(--brand-border-light);
            text-decoration: none;
            color: var(--brand-text);
            transform: translateX(3px);
        }
        .sidebar-service-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--brand-radius-sm);
            background: linear-gradient(135deg, var(--brand-accent), var(--brand-blue));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .sidebar-service-info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-service-info .title {
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--brand-text);
        }
        .sidebar-service-info .desc {
            font-size: 0.78rem;
            color: var(--brand-text-muted);
            margin-top: 2px;
        }
        .sidebar-cta-card {
            background: linear-gradient(145deg, var(--brand-navy), #0f1b42);
            color: #ffffff;
            border-radius: var(--brand-radius-lg);
            padding: 28px 24px;
            text-align: center;
        }
        .sidebar-cta-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: #ffffff;
            border: none;
            padding: 0;
        }
        .sidebar-cta-card p {
            font-size: 0.88rem;
            color: rgba(255,255,255,.75);
            margin-bottom: 18px;
        }
        .sidebar-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: 24px;
            background: var(--brand-cta);
            color: #1a1a1a;
            font-weight: 600;
            font-size: 0.9rem;
            text-decoration: none;
            transition: all var(--brand-transition);
        }
        .sidebar-cta-btn:hover {
            background: #fbbf24;
            color: #0f0f0f;
            text-decoration: none;
            box-shadow: 0 4px 14px rgba(245,158,11,.4);
        }

        /* Related section */
        .related-section {
            padding: 48px 0 20px;
        }
        .related-section .section-label {
            font-size: 0.82rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--brand-accent);
            font-weight: 700;
            margin-bottom: 6px;
        }
        .related-section .section-heading {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--brand-deep);
            margin-bottom: 28px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        @media (max-width: 768px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }
        .related-card {
            background: #ffffff;
            border-radius: var(--brand-radius-lg);
            box-shadow: var(--brand-shadow-sm);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: all var(--brand-transition);
            text-decoration: none;
            color: var(--brand-text);
            border: 1px solid transparent;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--brand-shadow-lg);
            border-color: var(--brand-border-light);
            text-decoration: none;
            color: var(--brand-text);
        }
        .related-card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: var(--brand-bg-alt);
        }
        .related-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 12px;
            background: rgba(59,130,246,.1);
            color: var(--brand-blue);
            margin-bottom: 8px;
            align-self: flex-start;
        }
        .related-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--brand-deep);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .related-card-desc {
            font-size: 0.85rem;
            color: var(--brand-text-soft);
            flex: 1;
            margin-bottom: 10px;
        }
        .related-card-arrow {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--brand-accent);
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* CTA section */
        .cta-section {
            padding: 56px 0;
            background: linear-gradient(160deg, var(--brand-navy) 0%, #0d1a3a 50%, var(--brand-deep) 100%);
            position: relative;
            overflow: hidden;
            border-radius: var(--brand-radius-xl);
            margin-top: 24px;
            margin-bottom: 24px;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(59,130,246,.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section .container-custom {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255,255,255,.78);
            font-size: 1.05rem;
            margin-bottom: 28px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
        }
        .cta-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 28px;
            background: var(--brand-cta);
            color: #1a1a1a;
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            transition: all var(--brand-transition);
            border: none;
            cursor: pointer;
        }
        .cta-btn-primary:hover {
            background: #fbbf24;
            color: #0f0f0f;
            text-decoration: none;
            box-shadow: 0 6px 20px rgba(245,158,11,.45);
            transform: translateY(-2px);
        }
        .cta-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 28px;
            background: transparent;
            color: #ffffff;
            font-weight: 600;
            font-size: 1rem;
            text-decoration: none;
            border: 2px solid rgba(255,255,255,.4);
            transition: all var(--brand-transition);
            cursor: pointer;
        }
        .cta-btn-outline:hover {
            border-color: #ffffff;
            background: rgba(255,255,255,.08);
            color: #ffffff;
            text-decoration: none;
        }

        /* FAQ section */
        .faq-section {
            padding: 48px 0 56px;
        }
        .faq-section .section-label {
            font-size: 0.82rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--brand-accent);
            font-weight: 700;
            margin-bottom: 6px;
            text-align: center;
        }
        .faq-section .section-heading {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--brand-deep);
            margin-bottom: 32px;
            text-align: center;
        }
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: #ffffff;
            border-radius: var(--brand-radius);
            box-shadow: var(--brand-shadow-sm);
            overflow: hidden;
            border: 1px solid var(--brand-border-light);
            transition: all var(--brand-transition);
        }
        .faq-item:hover {
            box-shadow: var(--brand-shadow);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--brand-text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--brand-transition);
        }
        .faq-question:hover {
            color: var(--brand-accent);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--brand-text-muted);
            transition: transform var(--brand-transition);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--brand-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.93rem;
            color: var(--brand-text-soft);
            line-height: 1.75;
        }

        /* Footer */
        .site-footer {
            background: var(--brand-deep);
            color: rgba(255,255,255,.75);
            padding: 48px 0 24px;
            margin-top: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-brand-name {
            font-size: 1.25rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 8px;
        }
        .footer-desc {
            font-size: 0.9rem;
            color: rgba(255,255,255,.6);
            line-height: 1.6;
            margin: 0;
        }
        .footer-col-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            color: rgba(255,255,255,.6);
            font-size: 0.9rem;
            text-decoration: none;
            transition: color var(--brand-transition);
        }
        .footer-links a:hover {
            color: var(--brand-glow);
            text-decoration: none;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,.12);
            padding-top: 18px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,.45);
        }

/* roulang page: category2 */
:root {
            --brand-primary: #1a56db;
            --brand-primary-dark: #1e40af;
            --brand-primary-light: #3b82f6;
            --brand-accent: #f59e0b;
            --brand-accent-dark: #d97706;
            --brand-surface: #0f172a;
            --brand-surface-light: #1e293b;
            --brand-surface-lighter: #334155;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #f1f5f9;
            --bg-page: #f8fafc;
            --bg-white: #ffffff;
            --bg-light: #f1f5f9;
            --bg-lighter: #e2e8f0;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-xs: 4px;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.09), 0 4px 8px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.11), 0 6px 12px rgba(0, 0, 0, 0.06);
            --shadow-glow: 0 0 0 3px rgba(26, 86, 219, 0.15);
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --container-padding: 20px;
            --nav-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            letter-spacing: 0.01em;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--brand-primary);
        }

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

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

        .container-custom {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: var(--container-padding);
            padding-right: var(--container-padding);
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-xs);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .site-header .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .navbar-brand-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--brand-surface);
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }
        .navbar-brand-custom:hover {
            color: var(--brand-primary);
            opacity: 0.9;
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-dark));
            color: #fff;
            font-size: 0.8rem;
            font-weight: 800;
            border-radius: var(--radius-sm);
            letter-spacing: 0.02em;
            flex-shrink: 0;
        }

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

        .navbar-collapse-custom {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .navbar-nav-custom {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 4px;
        }
        .navbar-nav-custom .nav-item {
            position: relative;
        }
        .navbar-nav-custom .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-primary);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .navbar-nav-custom .nav-link:hover {
            color: var(--brand-primary);
            background: var(--bg-light);
        }
        .navbar-nav-custom .nav-link.active {
            color: var(--brand-primary);
            background: rgba(26, 86, 219, 0.08);
            font-weight: 600;
            box-shadow: inset 0 0 0 1px rgba(26, 86, 219, 0.12);
        }
        .nav-badge {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 2px 7px;
            border-radius: 20px;
            background: #fef3c7;
            color: #b45309;
            letter-spacing: 0.02em;
            line-height: 1.4;
        }
        .nav-cta-btn {
            display: inline-block;
            padding: 9px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--brand-primary);
            color: #fff !important;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
            margin-left: 8px;
        }
        .nav-cta-btn:hover {
            background: var(--brand-primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        @media (max-width: 992px) {
            .navbar-toggler-custom {
                display: block;
            }
            .navbar-collapse-custom {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                flex-direction: column;
                padding: 16px var(--container-padding);
                gap: 4px;
                z-index: 1040;
            }
            .navbar-collapse-custom.show {
                display: flex;
            }
            .navbar-nav-custom {
                flex-direction: column;
                width: 100%;
                gap: 2px;
            }
            .navbar-nav-custom .nav-link {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .nav-cta-btn {
                width: 100%;
                text-align: center;
                margin-left: 0;
                margin-top: 6px;
            }
        }

        /* ========== HERO ========== */
        .hero-category {
            position: relative;
            background: var(--brand-surface);
            background-image: linear-gradient(to right, rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.72)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 80px 0 90px;
            color: #fff;
            overflow: hidden;
        }
        .hero-category::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--brand-primary-light), var(--brand-accent), var(--brand-primary-light));
            opacity: 0.6;
        }
        .hero-category .hero-content {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            max-width: 680px;
        }
        .hero-category .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.15);
            color: #fbbf24;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.12);
        }
        .hero-category h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 0 0 18px;
            letter-spacing: -0.01em;
            color: #fff;
        }
        .hero-category .hero-subtitle {
            font-size: 1.15rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
        }
        .hero-category .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-category .hero-stats-row {
            display: flex;
            gap: 36px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .hero-category .hero-stat-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .hero-category .hero-stat-value {
            font-size: 2rem;
            font-weight: 800;
            color: #fbbf24;
            line-height: 1.1;
        }
        .hero-category .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.02em;
        }

        @media (max-width: 768px) {
            .hero-category {
                padding: 50px 0 56px;
            }
            .hero-category h1 {
                font-size: 1.9rem;
            }
            .hero-category .hero-subtitle {
                font-size: 1rem;
            }
            .hero-category .hero-stats-row {
                gap: 22px;
                margin-top: 28px;
            }
            .hero-category .hero-stat-value {
                font-size: 1.5rem;
            }
        }

        /* ========== SECTION COMMON ========== */
        .section-padding {
            padding: 72px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--brand-primary);
            background: rgba(26, 86, 219, 0.07);
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--brand-surface);
            margin: 0 0 10px;
            letter-spacing: -0.01em;
        }
        .section-header .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 1.55rem;
            }
        }

        /* ========== SERVICE CARDS ========== */
        .service-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(26, 86, 219, 0.2);
        }
        .service-card .card-img-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .service-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .service-card:hover .card-img-wrap img {
            transform: scale(1.06);
        }
        .service-card .card-icon-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(6px);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--brand-primary);
            box-shadow: var(--shadow-sm);
        }
        .service-card .card-body-custom {
            padding: 22px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card .card-body-custom h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--brand-surface);
        }
        .service-card .card-body-custom p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0 0 16px;
            line-height: 1.65;
            flex: 1;
        }
        .service-card .card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--brand-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-fast);
        }
        .service-card .card-link:hover {
            gap: 10px;
        }

        @media (max-width: 992px) {
            .service-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 600px) {
            .service-cards-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== PROCESS STEPS ========== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 12%;
            right: 12%;
            height: 3px;
            background: linear-gradient(90deg, var(--brand-primary-light), var(--brand-accent));
            border-radius: 10px;
            z-index: 0;
            opacity: 0.4;
        }
        .process-step {
            position: relative;
            z-index: 1;
            text-align: center;
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px 18px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        }
        .process-step:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .process-step .step-number {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--brand-primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.35);
        }
        .process-step h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--brand-surface);
            margin: 0 0 6px;
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.55;
        }

        @media (max-width: 992px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .process-steps::before {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .process-steps {
                grid-template-columns: 1fr;
            }
        }

        /* ========== INDUSTRY TAGS ========== */
        .industry-section {
            background: var(--brand-surface);
            color: #fff;
        }
        .industry-section .section-header h2 {
            color: #fff;
        }
        .industry-section .section-header .section-desc {
            color: rgba(255, 255, 255, 0.7);
        }
        .industry-section .section-header .section-tag {
            background: rgba(255, 255, 255, 0.12);
            color: #fbbf24;
        }
        .industry-tags-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }
        .industry-tag {
            display: inline-block;
            padding: 12px 22px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
            cursor: default;
        }
        .industry-tag:hover {
            background: rgba(255, 255, 255, 0.16);
            border-color: rgba(255, 255, 255, 0.35);
            transform: translateY(-2px);
        }
        .industry-tag.featured {
            background: rgba(245, 158, 11, 0.25);
            border-color: rgba(245, 158, 11, 0.5);
            color: #fde68a;
        }

        @media (max-width: 768px) {
            .industry-tag {
                padding: 10px 16px;
                font-size: 0.85rem;
            }
        }

        /* ========== ADVANTAGE HIGHLIGHTS ========== */
        .advantage-highlights {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .advantage-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        }
        .advantage-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .advantage-card .adv-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(26, 86, 219, 0.1), rgba(26, 86, 219, 0.05));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--brand-primary);
            margin-bottom: 16px;
        }
        .advantage-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--brand-surface);
            margin: 0 0 8px;
        }
        .advantage-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }
        .advantage-card .adv-stat {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--brand-primary);
            margin: 10px 0 4px;
            line-height: 1.1;
        }

        @media (max-width: 768px) {
            .advantage-highlights {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .advantage-highlights {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FAQ ACCORDION ========== */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 10px;
            overflow: hidden;
            background: #fff;
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-fast);
        }
        .faq-accordion .accordion-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-accordion .accordion-button {
            font-weight: 600;
            font-size: 1rem;
            color: var(--brand-surface);
            background: #fff;
            padding: 18px 22px;
            border-radius: var(--radius-md) !important;
            box-shadow: none;
            transition: background var(--transition-fast), color var(--transition-fast);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--brand-primary);
            background: rgba(26, 86, 219, 0.03);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: var(--shadow-glow);
            border-color: var(--brand-primary-light);
            z-index: 1;
        }
        .faq-accordion .accordion-button::after {
            transition: transform var(--transition-base);
        }
        .faq-accordion .accordion-body {
            padding: 6px 22px 22px;
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--brand-primary-dark), var(--brand-primary));
            color: #fff;
            text-align: center;
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 1;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 0 0 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 28px;
            line-height: 1.7;
        }
        .cta-section .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== BUTTONS ========== */
        .btn-brand {
            display: inline-block;
            padding: 13px 28px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            background: #fff;
            color: var(--brand-primary);
            border: 2px solid #fff;
            cursor: pointer;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            text-align: center;
        }
        .btn-brand:hover {
            background: #f1f5f9;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
            color: var(--brand-primary-dark);
        }
        .btn-brand-outline {
            display: inline-block;
            padding: 13px 28px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.6);
            cursor: pointer;
            transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
            text-align: center;
        }
        .btn-brand-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary-brand {
            display: inline-block;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            background: var(--brand-primary);
            color: #fff !important;
            border: none;
            cursor: pointer;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            text-align: center;
        }
        .btn-primary-brand:hover {
            background: var(--brand-primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--brand-surface);
            color: rgba(255, 255, 255, 0.75);
            padding: 48px 0 28px;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand-name {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .footer-desc {
            font-size: 0.88rem;
            line-height: 1.65;
            color: rgba(255, 255, 255, 0.6);
            margin: 0;
        }
        .footer-col-title {
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            font-size: 0.95rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 6px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 18px;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
        }

        /* ========== UTILITY ========== */
        .bg-white-section {
            background: #fff;
        }
        .bg-light-section {
            background: var(--bg-light);
        }
        .text-brand {
            color: var(--brand-primary);
        }
        .fw-800 {
            font-weight: 800;
        }