/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1b4d;
            --primary-light: #1a2d7a;
            --primary-dark: #0a1233;
            --accent: #d4a843;
            --accent-light: #e4c06a;
            --accent-dark: #b8922e;
            --bg-body: #f5f7fb;
            --bg-white: #ffffff;
            --bg-light: #f0f2f8;
            --bg-dark: #0d1538;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #7a7a9a;
            --border-color: #e2e6f0;
            --border-light: #eef0f6;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-sm: 0 2px 8px rgba(15, 27, 77, 0.06);
            --shadow-md: 0 6px 24px rgba(15, 27, 77, 0.10);
            --shadow-lg: 0 16px 48px rgba(15, 27, 77, 0.14);
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --spacer: 1rem;
            --nav-height: 68px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            padding-top: var(--nav-height);
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 3px solid var(--accent-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--accent-light);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
            margin-left: auto;
            margin-right: auto;
        }

        .container-narrow {
            max-width: 860px;
        }

        /* ===== 导航 ===== */
        .navbar-main {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--nav-height);
            padding: 0 1.25rem;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            display: flex;
            align-items: center;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            background: rgba(255, 255, 255, 0.96);
        }

        .navbar-main .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1200px;
            padding-left: 0;
            padding-right: 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .navbar-brand i {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .navbar-brand:hover {
            color: var(--primary-light);
        }

        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        .nav-link {
            padding: 0.5rem 1rem;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--bg-light);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(15, 27, 77, 0.06);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

        .navbar-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 50px;
            padding: 0.3rem 0.3rem 0.3rem 1rem;
            border: 1px solid transparent;
            transition: all var(--transition);
            max-width: 220px;
        }
        .navbar-search:focus-within {
            border-color: var(--accent-light);
            background: var(--bg-white);
            box-shadow: 0 0 0 4px rgba(212, 168, 67, 0.10);
        }
        .navbar-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.85rem;
            color: var(--text-primary);
            width: 100%;
            padding: 0.25rem 0;
        }
        .navbar-search input::placeholder {
            color: var(--text-muted);
        }
        .navbar-search button {
            border: none;
            background: var(--accent);
            color: #fff;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background var(--transition);
            flex-shrink: 0;
        }
        .navbar-search button:hover {
            background: var(--accent-dark);
        }

        .navbar-toggler {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 0.25rem 0.5rem;
            cursor: pointer;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler:hover {
            background: var(--bg-light);
        }

        /* 移动端导航 */
        @media (max-width: 820px) {
            .navbar-toggler {
                display: block;
            }
            .navbar-collapse {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                padding: 1rem 1.25rem;
                display: none;
                flex-direction: column;
                gap: 0.5rem;
                max-height: calc(100vh - var(--nav-height));
                overflow-y: auto;
            }
            .navbar-collapse.show {
                display: flex;
            }
            .navbar-nav {
                flex-direction: column;
                width: 100%;
                gap: 0.2rem;
            }
            .nav-link {
                padding: 0.7rem 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: rgba(15, 27, 77, 0.06);
            }
            .navbar-search {
                max-width: 100%;
                margin-top: 0.5rem;
            }
        }

        @media (min-width: 821px) {
            .navbar-collapse {
                display: flex !important;
                align-items: center;
                gap: 0.5rem;
            }
            .navbar-nav {
                flex-direction: row;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 27, 77, 0.85) 0%, rgba(10, 18, 51, 0.70) 60%, rgba(15, 27, 77, 0.50) 100%);
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            text-align: center;
            padding: 3rem 1.5rem;
            max-width: 820px;
            margin: 0 auto;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(212, 168, 67, 0.18);
            color: var(--accent-light);
            padding: 0.35rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            border: 1px solid rgba(212, 168, 67, 0.25);
            margin-bottom: 1.5rem;
            backdrop-filter: blur(4px);
        }
        .hero-title {
            font-size: clamp(2.4rem, 7vw, 4.2rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 1.2rem;
        }
        .hero-title span {
            color: var(--accent);
        }
        .hero-desc {
            font-size: clamp(1.05rem, 2vw, 1.3rem);
            color: rgba(255, 255, 255, 0.78);
            max-width: 640px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .hero-actions .btn {
            padding: 0.85rem 2.4rem;
            font-weight: 600;
            border-radius: 50px;
            font-size: 1rem;
            transition: all var(--transition);
            border: none;
        }
        .btn-primary-custom {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .btn-primary-custom:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 168, 67, 0.35);
        }
        .btn-outline-custom {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.35);
        }
        .btn-outline-custom:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 通用板块 ===== */
        .section-padding {
            padding: 5rem 0;
        }
        .section-padding-sm {
            padding: 3rem 0;
        }
        .section-title-wrapper {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        .section-title {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-divider {
            width: 50px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 1rem auto 0;
        }

        /* ===== 品牌简介 ===== */
        .about-block {
            background: var(--bg-white);
        }
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .about-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition);
        }
        .about-image:hover {
            transform: scale(1.01);
        }
        .about-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }
        .about-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 1rem;
        }
        .about-text p {
            color: var(--text-secondary);
            margin-bottom: 1.2rem;
            font-size: 1rem;
            line-height: 1.8;
        }
        .about-text .btn {
            margin-top: 0.5rem;
        }

        @media (max-width: 768px) {
            .about-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .about-image img {
                height: 240px;
            }
        }

        /* ===== 核心服务 / 分类卡片 ===== */
        .services-block {
            background: var(--bg-light);
        }
        .card-service {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 1.8rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .card-service:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212, 168, 67, 0.25);
        }
        .card-service .icon-wrap {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.2rem;
            font-size: 2rem;
            color: var(--accent);
            transition: all var(--transition);
        }
        .card-service:hover .icon-wrap {
            background: var(--accent);
            color: #fff;
        }
        .card-service h5 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }
        .card-service p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            flex: 1;
        }
        .card-service .badge-custom {
            margin-top: 0.8rem;
            background: var(--bg-light);
            color: var(--text-secondary);
            padding: 0.25rem 1rem;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 500;
        }
        .card-service:hover .badge-custom {
            background: rgba(212, 168, 67, 0.12);
            color: var(--accent-dark);
        }

        /* ===== 最新资讯列表 ===== */
        .news-block {
            background: var(--bg-white);
        }
        .card-news {
            display: flex;
            gap: 1.2rem;
            padding: 1.5rem;
            background: var(--bg-body);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            height: 100%;
        }
        .card-news:hover {
            border-color: rgba(212, 168, 67, 0.20);
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
        }
        .card-news .news-thumb {
            width: 160px;
            min-height: 110px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--border-color);
        }
        .card-news .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .card-news .news-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .card-news .news-category {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-dark);
            background: rgba(212, 168, 67, 0.10);
            padding: 0.15rem 0.7rem;
            border-radius: 50px;
            margin-bottom: 0.4rem;
            align-self: flex-start;
        }
        .card-news .news-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.3rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-news .news-title a {
            color: inherit;
        }
        .card-news .news-title a:hover {
            color: var(--accent-dark);
        }
        .card-news .news-excerpt {
            font-size: 0.88rem;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.3rem;
        }
        .card-news .news-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .card-news .news-meta i {
            margin-right: 0.25rem;
        }

        .news-empty {
            text-align: center;
            padding: 3rem 1.5rem;
            color: var(--text-muted);
            background: var(--bg-light);
            border-radius: var(--radius-md);
            font-size: 1rem;
        }

        @media (max-width: 640px) {
            .card-news {
                flex-direction: column;
            }
            .card-news .news-thumb {
                width: 100%;
                height: 180px;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-block {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .stats-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 27, 77, 0.88);
            z-index: 1;
        }
        .stats-block .container {
            position: relative;
            z-index: 2;
        }
        .stat-item {
            text-align: center;
            padding: 1.5rem;
        }
        .stat-number {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 0.3rem;
        }
        .stat-label {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
        }

        /* ===== 使用流程 ===== */
        .process-block {
            background: var(--bg-white);
        }
        .step-card {
            text-align: center;
            padding: 2rem 1.2rem;
            position: relative;
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 1.2rem;
            transition: all var(--transition);
        }
        .step-card:hover .step-number {
            background: var(--accent);
            color: var(--primary-dark);
            transform: scale(1.08);
        }
        .step-card h5 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .step-connector {
            display: none;
        }
        @media (min-width: 768px) {
            .step-connector {
                display: block;
                position: absolute;
                top: 3rem;
                right: -1.5rem;
                width: 3rem;
                height: 2px;
                background: var(--border-color);
            }
            .step-card:last-child .step-connector {
                display: none;
            }
        }

        /* ===== FAQ ===== */
        .faq-block {
            background: var(--bg-light);
        }
        .accordion-custom {
            max-width: 800px;
            margin: 0 auto;
        }
        .accordion-custom .accordion-item {
            border: none;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 0.75rem;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }
        .accordion-custom .accordion-button {
            font-weight: 600;
            color: var(--primary);
            font-size: 1rem;
            padding: 1.2rem 1.5rem;
            background: var(--bg-white);
            border: none;
            box-shadow: none;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            color: var(--accent-dark);
            background: var(--bg-white);
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }
        .accordion-custom .accordion-button::after {
            background-size: 1rem;
            transition: transform var(--transition);
        }
        .accordion-custom .accordion-body {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 27, 77, 0.85);
            z-index: 1;
        }
        .cta-block .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .cta-desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 1.8rem;
        }
        .cta-block .btn {
            padding: 0.85rem 2.8rem;
            font-weight: 600;
            border-radius: 50px;
            font-size: 1.05rem;
            border: none;
            transition: all var(--transition);
        }
        .cta-block .btn-primary-custom {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .cta-block .btn-primary-custom:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 168, 67, 0.30);
        }

        /* ===== 页脚 ===== */
        .footer-main {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 3.5rem 0 0;
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-brand i {
            color: var(--accent);
        }
        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 1.5rem;
        }
        .footer-heading {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-social {
            display: flex;
            gap: 0.8rem;
            margin-top: 1rem;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.5rem 0;
            margin-top: 2.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }

        @media (max-width: 768px) {
            .footer-main .row>div {
                margin-bottom: 2rem;
            }
            .footer-desc {
                max-width: 100%;
            }
        }

        /* ===== 额外响应式 ===== */
        @media (max-width: 480px) {
            :root {
                --nav-height: 60px;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .hero-section {
                min-height: 70vh;
            }
            .hero-content {
                padding: 2rem 1rem;
            }
            .hero-actions .btn {
                padding: 0.7rem 1.8rem;
                font-size: 0.9rem;
                width: 100%;
            }
            .card-service {
                padding: 1.2rem 1rem;
            }
            .stat-item {
                padding: 1rem 0.5rem;
            }
            .accordion-custom .accordion-button {
                padding: 1rem 1.2rem;
                font-size: 0.95rem;
            }
            .accordion-custom .accordion-body {
                padding: 0 1.2rem 1rem;
            }
            .navbar-brand {
                font-size: 1.1rem;
            }
            .navbar-brand i {
                font-size: 1.3rem;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .hero-title {
                font-size: 3rem;
            }
            .card-news .news-thumb {
                width: 130px;
                min-height: 90px;
            }
        }

        /* ===== 工具类 ===== */
        .rounded-custom {
            border-radius: var(--radius-md);
        }
        .shadow-custom {
            box-shadow: var(--shadow-md);
        }
        .text-accent {
            color: var(--accent);
        }
        .bg-accent-soft {
            background: rgba(212, 168, 67, 0.08);
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .gap-3 {
            gap: 1.5rem;
        }
        .mt-1 {
            margin-top: 0.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0a6e5e;
            --primary-dark: #07544a;
            --primary-light: #10a08a;
            --primary-bg: #e8f5f2;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #0ea5e9;
            --dark: #0f172a;
            --dark-light: #1e293b;
            --gray-900: #111827;
            --gray-800: #1f2937;
            --gray-700: #374151;
            --gray-600: #4b5563;
            --gray-500: #6b7280;
            --gray-400: #9ca3af;
            --gray-300: #d1d5db;
            --gray-200: #e5e7eb;
            --gray-100: #f3f4f6;
            --gray-50: #f9fafb;
            --white: #ffffff;
            --body-bg: #f7faf9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.14);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--body-bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== Navbar ===== */
        .navbar-main {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            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-color);
            transition: var(--transition);
            padding: 0;
            height: 64px;
        }
        .navbar-main .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            padding-top: 0;
            padding-bottom: 0;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            text-decoration: none;
            padding: 0;
        }
        .navbar-brand i {
            font-size: 1.6rem;
            color: var(--primary);
        }
        .navbar-brand:hover {
            color: var(--primary-dark);
        }
        .navbar-toggler {
            display: none;
            background: transparent;
            border: none;
            font-size: 1.4rem;
            color: var(--gray-700);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
        }
        .navbar-toggler:hover {
            background: var(--gray-100);
        }
        .navbar-collapse {
            display: flex;
            align-items: center;
            gap: 12px;
            flex: 1;
            justify-content: flex-end;
        }
        .navbar-nav {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 4px;
        }
        .navbar-nav .nav-link {
            display: block;
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--gray-700);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .navbar-search {
            display: flex;
            align-items: center;
            background: var(--gray-100);
            border-radius: 40px;
            padding: 0 6px 0 16px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            margin-left: 8px;
        }
        .navbar-search:focus-within {
            border-color: var(--primary);
            background: var(--white);
            box-shadow: 0 0 0 3px rgba(10, 110, 94, 0.12);
        }
        .navbar-search input {
            background: transparent;
            border: none;
            outline: none;
            padding: 7px 0;
            font-size: 0.88rem;
            color: var(--text-primary);
            width: 160px;
        }
        .navbar-search input::placeholder {
            color: var(--gray-400);
        }
        .navbar-search button {
            background: transparent;
            border: none;
            color: var(--gray-500);
            padding: 6px 12px;
            border-radius: 40px;
            cursor: pointer;
            transition: var(--transition);
        }
        .navbar-search button:hover {
            color: var(--primary);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            margin-top: 64px;
            padding: 80px 0 70px;
            background: linear-gradient(135deg, #0a6e5e 0%, #07544a 50%, #0d9488 100%);
            position: relative;
            overflow: hidden;
            min-height: 300px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            line-height: 1.2;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
        }
        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.9);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .page-banner .breadcrumb-custom {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 18px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.8);
        }
        .page-banner .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.85);
        }
        .page-banner .breadcrumb-custom a:hover {
            color: var(--white);
        }
        .page-banner .breadcrumb-custom span {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: 80px 0;
        }
        .section-block-alt {
            background: var(--white);
        }
        .section-title-wrap {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title-wrap h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-title-wrap p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-title-wrap .badge-section {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 40px;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }

        /* ===== Feature Cards ===== */
        .feature-card {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            height: 100%;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .feature-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .feature-card:hover .icon-wrap {
            background: var(--primary);
            color: var(--white);
        }
        .feature-card h5 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== Step Flow ===== */
        .step-item {
            display: flex;
            gap: 20px;
            padding: 28px 24px;
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            margin-bottom: 16px;
            align-items: flex-start;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
            transform: translateX(4px);
        }
        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
        }
        .step-content h5 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .step-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* ===== Stat / Highlight ===== */
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-card .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-card .stat-label {
            font-size: 0.95rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== News / Article Cards ===== */
        .article-card {
            background: var(--white);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
            box-shadow: var(--shadow-sm);
        }
        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .article-card .card-img {
            height: 200px;
            background: var(--gray-200);
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .article-card .card-img .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--primary);
            color: var(--white);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: 40px;
        }
        .article-card .card-body {
            padding: 22px 24px 24px;
        }
        .article-card .card-body h5 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
            line-height: 1.5;
        }
        .article-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--gray-400);
        }
        .article-card .card-body .meta i {
            margin-right: 4px;
        }

        /* ===== Testimonial ===== */
        .testimonial-card {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
            box-shadow: var(--shadow-sm);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .testimonial-card .stars {
            color: var(--secondary);
            font-size: 0.95rem;
            margin-bottom: 14px;
            letter-spacing: 2px;
        }
        .testimonial-card blockquote {
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 18px;
            font-style: italic;
        }
        .testimonial-card .user {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .testimonial-card .user .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 600;
            font-size: 1.1rem;
        }
        .testimonial-card .user .name {
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.95rem;
        }
        .testimonial-card .user .role {
            font-size: 0.82rem;
            color: var(--gray-400);
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 0;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 12px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: transform 0.3s;
            color: var(--gray-400);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0a6e5e 0%, #0d9488 100%);
            padding: 70px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 30px;
        }
        .cta-section .btn-cta {
            display: inline-block;
            padding: 16px 44px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--white);
            border-radius: 50px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }

        /* ===== Footer ===== */
        .footer-main {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer-brand {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand i {
            color: var(--primary-light);
        }
        .footer-desc {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 18px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            font-size: 1.1rem;
            text-decoration: none;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--white);
            transform: translateY(-3px);
        }
        .footer-heading {
            font-size: 1rem;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            transition: var(--transition);
            text-decoration: none;
        }
        .footer-links a:hover {
            color: var(--white);
            padding-left: 4px;
        }
        .footer-bottom {
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom p {
            margin-bottom: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .section-title-wrap h2 {
                font-size: 1.8rem;
            }
            .stat-card .stat-number {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .navbar-toggler {
                display: block;
            }
            .navbar-collapse {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 64px;
                left: 0;
                width: 100%;
                background: var(--white);
                padding: 16px 20px 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                gap: 10px;
            }
            .navbar-collapse.show {
                display: flex;
            }
            .navbar-nav {
                flex-direction: column;
                width: 100%;
                gap: 2px;
            }
            .navbar-nav .nav-link {
                padding: 10px 14px;
                width: 100%;
            }
            .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar-search {
                width: 100%;
                margin-left: 0;
                margin-top: 8px;
            }
            .navbar-search input {
                width: 100%;
            }
            .page-banner {
                padding: 60px 0 50px;
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .section-block {
                padding: 60px 0;
            }
            .section-title-wrap h2 {
                font-size: 1.6rem;
            }
            .step-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .stat-card .stat-number {
                font-size: 2rem;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section .btn-cta {
                padding: 14px 32px;
                font-size: 0.95rem;
            }
            .footer-main {
                padding: 40px 0 0;
            }
        }
        @media (max-width: 520px) {
            .navbar-brand {
                font-size: 1.15rem;
            }
            .navbar-brand i {
                font-size: 1.3rem;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .section-title-wrap h2 {
                font-size: 1.4rem;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .article-card .card-body {
                padding: 18px 18px 20px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
            }
            .testimonial-card {
                padding: 24px 20px;
            }
            .step-item {
                padding: 20px 18px;
            }
            .stat-card {
                padding: 24px 16px;
            }
        }

        /* ===== Utility ===== */
        .text-primary-custom {
            color: var(--primary) !important;
        }
        .bg-primary-soft {
            background: var(--primary-bg);
        }
        .shadow-hover {
            transition: var(--transition);
        }
        .shadow-hover:hover {
            box-shadow: var(--shadow-md);
        }
        .rounded-12 {
            border-radius: var(--radius-md);
        }
        .mt-n1 {
            margin-top: -4px;
        }

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

/* roulang page: article */
:root {
            --primary: #1a4b8c;
            --primary-dark: #0f3460;
            --primary-light: #2d6cb4;
            --secondary: #e8a838;
            --secondary-light: #f5c84a;
            --accent: #22b8a0;
            --bg-light: #f6f8fc;
            --bg-white: #ffffff;
            --bg-dark: #0b1a2e;
            --text-dark: #1a2332;
            --text-body: #3d4a5c;
            --text-muted: #8896a8;
            --text-light: #f0f4fa;
            --border-light: #e2e8f0;
            --border-medium: #cbd5e1;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(26, 75, 140, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 75, 140, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 75, 140, 0.14);
            --shadow-glow: 0 0 0 3px rgba(26, 75, 140, 0.15);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            color: var(--text-body);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.3; }
        .container { max-width: 1260px; padding-left: 24px; padding-right: 24px; margin: 0 auto; }
        @media (min-width: 1400px) { .container { max-width: 1320px; } }
        @media (max-width: 576px) { .container { padding-left: 16px; padding-right: 16px; } }

        .navbar-main {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(12px);
            box-shadow: var(--shadow-sm);
            padding: 0;
            height: 70px;
            display: flex;
            align-items: center;
        }
        .navbar-main .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }
        .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
            white-space: nowrap;
        }
        .navbar-brand i { color: var(--secondary); font-size: 1.6rem; }
        .navbar-brand:hover { color: var(--primary-dark); }
        .navbar-toggler {
            display: none;
            background: transparent;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            padding: 4px 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler:focus { outline: none; box-shadow: var(--shadow-glow); }
        .navbar-collapse {
            display: flex;
            align-items: center;
            flex: 1;
            margin-left: 40px;
            gap: 16px;
        }
        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }
        .nav-link {
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-link:hover { background: var(--bg-light); color: var(--primary); }
        .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 12px rgba(26, 75, 140, 0.25);
        }
        .nav-link.active:hover { background: var(--primary-dark); color: #fff; }
        .navbar-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 40px;
            padding: 2px 2px 2px 16px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            max-width: 240px;
            flex-shrink: 1;
            margin-left: auto;
        }
        .navbar-search:focus-within { border-color: var(--primary); box-shadow: var(--shadow-glow); }
        .navbar-search input {
            border: none;
            background: transparent;
            padding: 6px 0;
            font-size: 0.9rem;
            outline: none;
            width: 100%;
            min-width: 80px;
            color: var(--text-dark);
        }
        .navbar-search input::placeholder { color: var(--text-muted); }
        .navbar-search button {
            background: var(--primary);
            border: none;
            color: #fff;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .navbar-search button:hover { background: var(--primary-dark); }
        .navbar-search button:focus { outline: none; box-shadow: var(--shadow-glow); }

        @media (max-width: 992px) {
            .navbar-main { height: 62px; }
            .navbar-toggler { display: block; }
            .navbar-collapse {
                position: fixed;
                top: 62px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 20px 24px;
                margin: 0;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                z-index: 1040;
                align-items: stretch;
                gap: 12px;
                max-height: calc(100vh - 62px);
                overflow-y: auto;
            }
            .navbar-collapse.show {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .navbar-nav {
                flex-direction: column;
                gap: 2px;
                width: 100%;
            }
            .nav-link {
                padding: 10px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .navbar-search {
                max-width: 100%;
                margin-left: 0;
                width: 100%;
            }
        }

        .page-hero {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            color: var(--text-light);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11,26,46,0.82) 0%, rgba(26,75,140,0.70) 100%);
        }
        .page-hero .container { position: relative; z-index: 1; }
        .page-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            max-width: 800px;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-hero .meta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 28px;
            align-items: center;
            color: rgba(255,255,255,0.75);
            font-size: 0.95rem;
        }
        .page-hero .meta-row i { margin-right: 6px; color: var(--secondary-light); }
        .page-hero .badge-category {
            display: inline-block;
            padding: 4px 16px;
            background: var(--secondary);
            color: var(--text-dark);
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.3px;
        }
        .breadcrumb-bar {
            padding: 14px 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb-bar a { color: var(--text-muted); font-size: 0.9rem; }
        .breadcrumb-bar a:hover { color: var(--primary); }
        .breadcrumb-bar span { color: var(--text-body); font-size: 0.9rem; }

        .article-section {
            padding: 50px 0 60px;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 48px 52px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .article-body h2 {
            font-size: 1.6rem;
            margin-top: 36px;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
        }
        .article-body h3 {
            font-size: 1.25rem;
            margin-top: 28px;
            margin-bottom: 12px;
        }
        .article-body p {
            margin-bottom: 18px;
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-body);
        }
        .article-body ul, .article-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
            list-style: disc;
        }
        .article-body li { margin-bottom: 8px; font-size: 1.02rem; line-height: 1.7; }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-light);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-dark);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            width: 100%;
            object-fit: cover;
        }
        .article-body a { color: var(--primary); text-decoration: underline; }
        .article-body a:hover { color: var(--primary-light); }

        @media (max-width: 768px) {
            .page-hero { padding: 50px 0 40px; }
            .page-hero h1 { font-size: 1.6rem; }
            .article-body { padding: 24px 20px; }
            .article-body p { font-size: 1rem; }
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .tag-list .tag {
            display: inline-block;
            padding: 4px 16px;
            background: var(--bg-light);
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--text-muted);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .tag-list .tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

        .related-section {
            padding: 60px 0 50px;
            background: var(--bg-white);
        }
        .related-section .section-title {
            font-size: 1.7rem;
            font-weight: 700;
            margin-bottom: 32px;
            position: relative;
            padding-bottom: 14px;
        }
        .related-section .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .related-card {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-light);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
        .related-card .card-img {
            height: 180px;
            background: var(--border-light) center center / cover no-repeat;
            flex-shrink: 0;
        }
        .related-card .card-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body h5 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h5 a { color: var(--text-dark); }
        .related-card .card-body h5 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
            flex: 1;
        }
        .related-card .card-body .meta { font-size: 0.8rem; color: var(--text-muted); }

        .cta-section {
            padding: 60px 0;
            background: var(--bg-dark) url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11,26,46,0.85) 0%, rgba(26,75,140,0.75) 100%);
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { color: #fff; font-size: 2rem; font-weight: 700; }
        .cta-section p { color: rgba(255,255,255,0.8); font-size: 1.1rem; max-width: 600px; margin: 12px auto 24px; }
        .cta-section .btn-cta {
            display: inline-block;
            padding: 14px 40px;
            background: var(--secondary);
            color: var(--text-dark);
            border-radius: 40px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            border: none;
            box-shadow: 0 4px 16px rgba(232,168,56,0.35);
        }
        .cta-section .btn-cta:hover { background: var(--secondary-light); transform: translateY(-3px); box-shadow: 0 8px 28px rgba(232,168,56,0.45); color: var(--text-dark); }

        .faq-section {
            padding: 60px 0 70px;
            background: var(--bg-light);
        }
        .faq-section .section-title {
            font-size: 1.7rem;
            font-weight: 700;
            margin-bottom: 32px;
            position: relative;
            padding-bottom: 14px;
        }
        .faq-section .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 22px 28px;
            margin-bottom: 14px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover { border-color: var(--primary-light); box-shadow: var(--shadow-sm); }
        .faq-item .faq-question {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .faq-item .faq-question i { color: var(--primary); transition: var(--transition); }
        .faq-item .faq-answer {
            margin-top: 12px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }

        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box i { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box .btn-home {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 40px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-home:hover { background: var(--primary-dark); transform: translateY(-2px); }

        .footer-main {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer-main .footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-main .footer-brand i { color: var(--secondary); }
        .footer-main .footer-desc { font-size: 0.95rem; margin-bottom: 18px; max-width: 360px; }
        .footer-main .footer-social { display: flex; gap: 12px; }
        .footer-main .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.6);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-main .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
        .footer-main .footer-heading {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-main .footer-heading::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .footer-main .footer-links { display: flex; flex-direction: column; gap: 10px; }
        .footer-main .footer-links a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-main .footer-links a:hover { color: var(--secondary-light); padding-left: 4px; }
        .footer-main .footer-bottom {
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid rgba(255,255,255,0.08);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-main .footer-bottom p { margin: 0; }

        @media (max-width: 768px) {
            .footer-main .footer-brand { font-size: 1.3rem; }
            .footer-main .footer-heading { margin-top: 8px; }
        }

        .btn-back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            cursor: pointer;
            transition: var(--transition);
            opacity: 0;
            pointer-events: none;
            z-index: 999;
        }
        .btn-back-top.show { opacity: 1; pointer-events: auto; }
        .btn-back-top:hover { background: var(--primary-dark); transform: translateY(-4px); }
        .btn-back-top:focus { outline: none; box-shadow: var(--shadow-glow); }

        @media (max-width: 576px) {
            .page-hero h1 { font-size: 1.35rem; }
            .related-card .card-img { height: 140px; }
            .cta-section h2 { font-size: 1.4rem; }
            .cta-section .btn-cta { padding: 12px 28px; font-size: 0.95rem; }
        }