/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a6a;
            --primary-dark: #0f2444;
            --primary-light: #2a5a9a;
            --accent: #e85d3a;
            --accent-light: #f07a5a;
            --accent-dark: #c94a2a;
            --bg-light: #f5f7fa;
            --bg-white: #ffffff;
            --bg-dark: #1a2a4a;
            --text-dark: #1a1a2e;
            --text-body: #3d4a5c;
            --text-muted: #7a8699;
            --text-white: #ffffff;
            --border-color: #e2e6ee;
            --border-light: #f0f2f6;
            --shadow-sm: 0 2px 8px rgba(26, 42, 74, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 42, 74, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 42, 74, 0.14);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1280px;
            --nav-height: 76px;
        }

        /* ===== Base Reset ===== */
        *,
        *::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: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-white);
            overflow-x: hidden;
        }

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

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

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

        ul,
        ol {
            list-style: none;
            padding: 0;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 0.5rem;
        }

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

        .container-narrow {
            max-width: 960px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Section Spacing ===== */
        .section-padding {
            padding: 80px 0;
        }

        .section-padding-sm {
            padding: 48px 0;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
            color: var(--text-dark);
        }

        .section-subtitle {
            font-size: 1.125rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 2.5rem;
            line-height: 1.7;
        }

        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 0 auto 1.5rem;
        }

        /* ===== Buttons ===== */
        .btn {
            font-weight: 600;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            border: 2px solid transparent;
            transition: var(--transition);
            font-size: 1rem;
            line-height: 1.4;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            cursor: pointer;
            text-align: center;
            justify-content: center;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 93, 58, 0.35);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 3px;
        }

        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.6);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.6);
            outline-offset: 3px;
        }

        .btn-outline-dark {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline-dark:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 58, 106, 0.25);
        }

        .btn-lg {
            padding: 0.9rem 2.5rem;
            font-size: 1.1rem;
        }

        .btn-sm {
            padding: 0.5rem 1.25rem;
            font-size: 0.875rem;
        }

        /* ===== Badge / Tag ===== */
        .badge-custom {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.9rem;
            border-radius: 50px;
            letter-spacing: 0.02em;
            text-transform: uppercase;
        }

        .badge-accent {
            background: var(--accent);
            color: #fff;
        }

        .badge-soft {
            background: rgba(26, 58, 106, 0.08);
            color: var(--primary);
            font-weight: 500;
        }

        /* ===== Card ===== */
        .card-custom {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            transition: var(--transition);
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }

        .card-custom .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(26, 58, 106, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 1.25rem;
            transition: var(--transition);
        }
        .card-custom:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }

        .card-custom .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }

        .card-custom .card-text {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== Navbar ===== */
        .navbar-custom {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            height: var(--nav-height);
            padding: 0;
            transition: var(--transition);
            position: sticky;
            top: 0;
            z-index: 1040;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
        }
        .navbar-custom .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            padding: 0;
            margin: 0;
            line-height: var(--nav-height);
        }
        .navbar-custom .navbar-brand:hover {
            color: var(--primary-dark);
        }
        .navbar-custom .navbar-brand .brand-dot {
            color: var(--accent);
        }

        .navbar-custom .navbar-nav {
            gap: 0.25rem;
        }
        .navbar-custom .nav-link {
            color: var(--text-body);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.5rem 1rem !important;
            border-radius: 50px;
            transition: var(--transition);
            position: relative;
        }
        .navbar-custom .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 58, 106, 0.06);
        }
        .navbar-custom .nav-link.active {
            color: var(--primary);
            background: rgba(26, 58, 106, 0.10);
            font-weight: 600;
        }
        .navbar-custom .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-custom .nav-cta {
            background: var(--accent);
            color: #fff !important;
            padding: 0.5rem 1.5rem !important;
            border-radius: 50px;
            font-weight: 600;
        }
        .navbar-custom .nav-cta:hover {
            background: var(--accent-dark);
            color: #fff !important;
            transform: translateY(-1px);
        }

        .navbar-custom .navbar-toggler {
            border: none;
            padding: 0.5rem;
            color: var(--primary);
            font-size: 1.4rem;
        }
        .navbar-custom .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 36, 68, 0.88) 0%, rgba(26, 58, 106, 0.72) 50%, rgba(26, 42, 74, 0.60) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-content {
            max-width: 780px;
            padding: 40px 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            margin-bottom: 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 1.25rem;
        }
        .hero-content h1 .highlight {
            color: var(--accent);
            position: relative;
        }
        .hero-content .hero-sub {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-stats .stat-item {
            color: #fff;
        }
        .hero-stats .stat-item .stat-num {
            font-size: 1.75rem;
            font-weight: 800;
            line-height: 1.2;
        }
        .hero-stats .stat-item .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            font-weight: 400;
        }

        /* ===== Features ===== */
        .features-section {
            background: var(--bg-light);
        }

        /* ===== Services ===== */
        .services-section .service-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
        }
        .services-section .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .services-section .service-card .card-img {
            height: 200px;
            background: var(--bg-light);
            overflow: hidden;
        }
        .services-section .service-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .services-section .service-card:hover .card-img img {
            transform: scale(1.05);
        }
        .services-section .service-card .card-body {
            padding: 1.5rem;
        }
        .services-section .service-card .card-body .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .services-section .service-card .card-body .card-text {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .services-section .service-card .card-body .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 93, 58, 0.08);
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            margin-top: 0.75rem;
        }

        /* ===== Stats ===== */
        .stats-section {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            position: relative;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 36, 68, 0.88);
            z-index: 1;
        }
        .stats-section .container {
            position: relative;
            z-index: 2;
        }
        .stats-section .stat-block {
            text-align: center;
            color: #fff;
            padding: 1.5rem;
        }
        .stats-section .stat-block .stat-icon {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 0.75rem;
        }
        .stats-section .stat-block .stat-number {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stats-section .stat-block .stat-desc {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.70);
            margin-top: 0.25rem;
        }

        /* ===== News / CMS List ===== */
        .news-section .news-card {
            display: flex;
            gap: 1.25rem;
            padding: 1.25rem 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .news-section .news-card:last-child {
            border-bottom: none;
        }
        .news-section .news-card:hover {
            padding-left: 0.5rem;
        }
        .news-section .news-card .news-date {
            flex-shrink: 0;
            width: 56px;
            text-align: center;
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            padding: 0.5rem 0;
            align-self: flex-start;
        }
        .news-section .news-card .news-date .day {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .news-section .news-card .news-date .month {
            font-size: 0.75rem;
            color: var(--text-muted);
            text-transform: uppercase;
            font-weight: 600;
        }
        .news-section .news-card .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-section .news-card .news-body .news-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.25rem;
            display: block;
            transition: var(--transition);
        }
        .news-section .news-card .news-body .news-title:hover {
            color: var(--primary);
        }
        .news-section .news-card .news-body .news-summary {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-section .news-card .news-body .news-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 0.35rem;
        }
        .news-section .news-card .news-body .news-meta .badge-soft {
            font-size: 0.7rem;
            padding: 0.15rem 0.6rem;
        }
        .news-empty {
            text-align: center;
            padding: 2.5rem 1rem;
            color: var(--text-muted);
            background: var(--bg-light);
            border-radius: var(--radius-md);
            font-size: 1rem;
        }

        /* ===== Trust / Clients ===== */
        .trust-section {
            background: var(--bg-light);
        }
        .trust-section .trust-item {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 1.5rem 1rem;
            opacity: 0.6;
            transition: var(--transition);
            filter: grayscale(1);
        }
        .trust-section .trust-item:hover {
            opacity: 1;
            filter: grayscale(0);
        }
        .trust-section .trust-item img {
            max-height: 48px;
            width: auto;
        }

        .testimonial-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .testimonial-card .quote-icon {
            color: var(--accent);
            font-size: 1.5rem;
            margin-bottom: 0.75rem;
            opacity: 0.6;
        }
        .testimonial-card .quote-text {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.7;
            font-style: italic;
            margin-bottom: 1rem;
        }
        .testimonial-card .quote-author {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .testimonial-card .quote-author .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            font-size: 1rem;
        }
        .testimonial-card .quote-author .author-info .name {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-dark);
        }
        .testimonial-card .quote-author .author-info .role {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-section .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 0.75rem;
            overflow: hidden;
            background: var(--bg-white);
        }
        .faq-section .accordion-item:not(:first-of-type) {
            border-top: 1px solid var(--border-color);
        }
        .faq-section .accordion-button {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            padding: 1.25rem 1.5rem;
            background: var(--bg-white);
            box-shadow: none !important;
            border: none;
        }
        .faq-section .accordion-button:not(.collapsed) {
            background: var(--bg-light);
            color: var(--primary);
        }
        .faq-section .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .faq-section .accordion-button::after {
            background-size: 1rem;
            transition: var(--transition);
        }
        .faq-section .accordion-body {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-body);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 58, 106, 0.92) 0%, rgba(26, 42, 74, 0.85) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2.5rem;
            font-weight: 800;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.80);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 2rem;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.70);
            padding: 48px 0 32px;
        }
        .footer .footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .footer .footer-brand .brand-dot {
            color: var(--accent);
        }
        .footer .footer-desc {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer .footer-heading {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer .footer-links a {
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer .footer-divider {
            border-color: rgba(255, 255, 255, 0.10);
            margin: 2rem 0 1.5rem;
        }
        .footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.50);
        }
        .footer .footer-bottom a:hover {
            color: #fff;
        }
        .footer .footer-social {
            display: flex;
            gap: 0.75rem;
        }
        .footer .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.60);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199.98px) {
            .hero-content h1 {
                font-size: 3rem;
            }
        }

        @media (max-width: 991.98px) {
            .section-padding {
                padding: 60px 0;
            }
            .hero {
                min-height: 75vh;
            }
            .hero-content h1 {
                font-size: 2.6rem;
            }
            .hero-content .hero-sub {
                font-size: 1.05rem;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .hero-stats .stat-item .stat-num {
                font-size: 1.4rem;
            }
            .navbar-custom .navbar-nav {
                padding: 1rem 0;
                gap: 0;
            }
            .navbar-custom .nav-link {
                padding: 0.6rem 1rem !important;
                border-radius: 8px;
            }
            .navbar-custom .nav-link.active::after {
                display: none;
            }
            .navbar-custom .nav-cta {
                margin-top: 0.5rem;
                text-align: center;
            }
            .stats-section .stat-block .stat-number {
                font-size: 2.2rem;
            }
            .cta-section h2 {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 767.98px) {
            .section-padding {
                padding: 44px 0;
            }
            .hero {
                min-height: 70vh;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-content .hero-sub {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 1rem;
                margin-top: 2rem;
                padding-top: 1.5rem;
            }
            .hero-stats .stat-item {
                display: flex;
                align-items: baseline;
                gap: 0.5rem;
            }
            .hero-stats .stat-item .stat-num {
                font-size: 1.2rem;
            }
            .services-section .service-card .card-img {
                height: 160px;
            }
            .stats-section .stat-block .stat-number {
                font-size: 1.8rem;
            }
            .news-section .news-card {
                flex-direction: column;
                gap: 0.75rem;
            }
            .news-section .news-card .news-date {
                width: auto;
                display: flex;
                align-items: center;
                gap: 0.5rem;
                padding: 0.25rem 0.75rem;
                background: var(--bg-light);
                border-radius: 50px;
            }
            .news-section .news-card .news-date .day {
                font-size: 1rem;
            }
            .news-section .news-card .news-date .month {
                font-size: 0.7rem;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-content .hero-sub {
                font-size: 0.88rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 0.3rem 0.9rem;
            }
            .btn-lg {
                padding: 0.7rem 1.5rem;
                font-size: 0.95rem;
            }
            .stats-section .stat-block .stat-number {
                font-size: 1.5rem;
            }
            .testimonial-card {
                padding: 1.25rem;
            }
        }

        /* ===== Accessibility ===== */
        :focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
        }

        .skip-link {
            position: absolute;
            top: -100%;
            left: 0;
            background: var(--primary);
            color: #fff;
            padding: 0.5rem 1rem;
            z-index: 9999;
            transition: top 0.2s;
        }
        .skip-link:focus {
            top: 0;
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade-up {
            animation: fadeUp 0.6s ease forwards;
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #f5a623;
            --accent-hover: #e09512;
            --accent-soft: #fef3e0;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0f2440;
            --text-dark: #1a2a3a;
            --text-body: #3d4f60;
            --text-muted: #7a8a9a;
            --text-light: #ffffff;
            --border-color: #e8ecf0;
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --border-radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26, 58, 92, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 58, 92, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 58, 92, 0.14);
            --shadow-hover: 0 12px 36px rgba(26, 58, 92, 0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
            --spacing-section: 5rem;
            --spacing-section-mobile: 3rem;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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-base);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-white);
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            padding-left: 1.25rem;
            padding-right: 1.25rem;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Navigation ===== */
        .navbar-custom {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(232, 236, 240, 0.7);
            transition: var(--transition);
        }
        .navbar-custom .container {
            height: 100%;
        }
        .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
            line-height: 1;
            padding: 0;
            margin: 0;
        }
        .navbar-brand .brand-dot {
            color: var(--accent);
            font-weight: 900;
        }
        .navbar-brand:hover {
            color: var(--primary-dark);
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 1.4rem;
            color: var(--text-dark);
            padding: 0.25rem 0.5rem;
            cursor: pointer;
        }
        .navbar-toggler:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .navbar-nav {
            gap: 0.25rem;
        }
        .nav-item .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .nav-item .nav-link:hover {
            color: var(--primary);
            background: var(--bg-light);
        }
        .nav-item .nav-link.active {
            color: var(--primary-dark);
            font-weight: 600;
            background: var(--accent-soft);
        }
        .nav-item .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
        }
        .nav-item .nav-link.nav-cta {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 600;
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            margin-left: 0.5rem;
        }
        .nav-item .nav-link.nav-cta:hover {
            background: var(--accent-hover);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        @media (max-width: 991.98px) {
            .navbar-custom {
                height: auto;
                min-height: var(--nav-height);
            }
            .navbar-nav {
                padding: 1rem 0;
                gap: 0.125rem;
            }
            .nav-item .nav-link {
                padding: 0.625rem 1rem;
            }
            .nav-item .nav-link.active::after {
                display: none;
            }
            .nav-item .nav-link.nav-cta {
                margin-left: 0;
                margin-top: 0.5rem;
                text-align: center;
            }
            #navMain.collapse:not(.show) {
                display: none !important;
            }
            #navMain.collapse.show {
                display: block !important;
                background: var(--bg-white);
                border-top: 1px solid var(--border-color);
                padding: 0.5rem 0;
            }
        }

        /* ===== Hero Section ===== */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            padding: calc(var(--nav-height) + 2rem) 0 4rem;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
            z-index: 0;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-white) 0%, transparent 100%);
            z-index: 1;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.20);
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 1.5rem;
            font-weight: 500;
        }
        .hero-badge i {
            color: var(--accent);
        }
        .hero-title {
            font-size: clamp(2.2rem, 5.5vw, 4rem);
            font-weight: 800;
            color: var(--text-light);
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 1.25rem;
        }
        .hero-title .highlight {
            color: var(--accent);
            background: linear-gradient(135deg, var(--accent), #ffc857);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-sub {
            font-size: clamp(1.05rem, 1.8vw, 1.25rem);
            color: rgba(255, 255, 255, 0.85);
            max-width: 660px;
            line-height: 1.7;
            margin-bottom: 2.25rem;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }
        .hero-actions .btn-primary-custom {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 0.9rem 2.4rem;
            border-radius: 50px;
            border: none;
            font-size: 1.05rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.35);
        }
        .hero-actions .btn-primary-custom:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(245, 166, 35, 0.45);
        }
        .hero-actions .btn-outline-custom {
            background: transparent;
            color: var(--text-light);
            font-weight: 600;
            padding: 0.85rem 2rem;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.35);
            font-size: 1rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .hero-actions .btn-outline-custom:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(245, 166, 35, 0.08);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-item .number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-light);
            line-height: 1.2;
        }
        .hero-stat-item .number span {
            color: var(--accent);
        }
        .hero-stat-item .label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 0.2rem;
        }
        @media (max-width: 767.98px) {
            .hero-section {
                min-height: auto;
                padding: calc(var(--nav-height) + 1.5rem) 0 3rem;
            }
            .hero-stats {
                gap: 1.5rem;
                margin-top: 2rem;
                padding-top: 1.5rem;
            }
            .hero-stat-item .number {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary-custom,
            .hero-actions .btn-outline-custom {
                justify-content: center;
                text-align: center;
            }
        }

        /* ===== Section Common ===== */
        .section-padding {
            padding: var(--spacing-section) 0;
        }
        .section-padding-sm {
            padding: 3rem 0;
        }
        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            color: var(--text-dark);
            text-align: center;
            margin-bottom: 0.75rem;
            letter-spacing: -0.015em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 3rem;
            line-height: 1.7;
        }
        .section-subtitle.left {
            text-align: left;
            margin-left: 0;
        }
        .bg-soft {
            background: var(--bg-light);
        }
        .bg-dark-custom {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
        }
        .bg-dark-custom .section-title {
            color: var(--text-light);
        }
        .bg-dark-custom .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 2rem 1.75rem;
            transition: var(--transition);
            height: 100%;
            box-shadow: var(--shadow-sm);
        }
        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .card-custom .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: var(--border-radius-sm);
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent);
            margin-bottom: 1.25rem;
            transition: var(--transition);
        }
        .card-custom:hover .icon-wrap {
            background: var(--accent);
            color: var(--text-light);
        }
        .card-custom .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--text-dark);
        }
        .card-custom .card-desc {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .card-custom .card-tag {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            margin-bottom: 0.75rem;
        }
        .card-custom-featured {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: rgba(255, 255, 255, 0.9);
        }
        .card-custom-featured .card-title {
            color: var(--text-light);
        }
        .card-custom-featured .card-desc {
            color: rgba(255, 255, 255, 0.75);
        }
        .card-custom-featured .icon-wrap {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
        }
        .card-custom-featured:hover {
            background: var(--primary);
            border-color: var(--primary);
        }

        /* ===== Feature Grid ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.75rem;
        }
        @media (min-width: 992px) {
            .feature-grid.cols-4 {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        @media (max-width: 767.98px) {
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 1.25rem;
            }
        }

        /* ===== Solution / Industry Cards ===== */
        .solution-card {
            position: relative;
            border-radius: var(--border-radius);
            overflow: hidden;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
            box-shadow: var(--shadow-sm);
        }
        .solution-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .solution-card .sol-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }
        .solution-card .sol-body {
            padding: 1.5rem 1.5rem 1.75rem;
        }
        .solution-card .sol-tag {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 0.72rem;
            font-weight: 600;
            padding: 0.15rem 0.7rem;
            border-radius: 50px;
            margin-bottom: 0.6rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .solution-card .sol-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }
        .solution-card .sol-desc {
            font-size: 0.92rem;
            color: var(--text-body);
            line-height: 1.65;
            margin-bottom: 0;
        }
        .solution-card .sol-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary-light);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            margin-top: 1rem;
            transition: var(--transition);
        }
        .solution-card .sol-link:hover {
            color: var(--primary);
            gap: 0.7rem;
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2rem;
            counter-reset: step;
        }
        .process-step {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--bg-white);
            border-radius: var(--border-radius);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            position: relative;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .process-step .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.25rem;
            transition: var(--transition);
        }
        .process-step:hover .step-number {
            background: var(--accent);
            color: var(--text-light);
        }
        .process-step .step-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.5rem;
        }
        .process-step .step-desc {
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== Stats / Counters ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 2rem;
            text-align: center;
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 0.35rem;
        }
        @media (max-width: 575.98px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 1.25rem 0;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 0.25rem 0;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 1.1rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"]::after {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-answer {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.7;
            padding: 0.5rem 0 0.25rem;
        }
        .faq-answer ul {
            padding-left: 1.25rem;
            list-style: disc;
            margin-top: 0.5rem;
        }
        .faq-answer ul li {
            margin-bottom: 0.25rem;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 5rem 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 1rem;
            text-align: center;
        }
        .cta-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }
        .cta-actions .btn-cta-primary {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 0.9rem 2.6rem;
            border-radius: 50px;
            border: none;
            font-size: 1.05rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.35);
        }
        .cta-actions .btn-cta-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(245, 166, 35, 0.5);
        }
        .cta-actions .btn-cta-outline {
            background: transparent;
            color: var(--text-light);
            font-weight: 600;
            padding: 0.85rem 2.2rem;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            font-size: 1rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .cta-actions .btn-cta-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(245, 166, 35, 0.08);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 0;
        }
        .footer .footer-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }
        .footer .footer-brand .brand-dot {
            color: var(--accent);
        }
        .footer .footer-desc {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 300px;
        }
        .footer .footer-heading {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }
        .footer .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer .footer-social {
            display: flex;
            gap: 0.75rem;
            margin-top: 0.5rem;
        }
        .footer .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer .footer-divider {
            border-color: rgba(255, 255, 255, 0.08);
            margin: 2.5rem 0 1.5rem;
        }
        .footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 2rem;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
            gap: 0.5rem;
        }
        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 767.98px) {
            .footer .footer-desc {
                max-width: 100%;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 0.5rem;
            }
        }

        /* ===== Responsive Helpers ===== */
        @media (max-width: 991.98px) {
            .section-padding {
                padding: var(--spacing-section-mobile) 0;
            }
            .section-subtitle {
                margin-bottom: 2rem;
            }
        }
        @media (max-width: 575.98px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        /* ===== Focus & Accessibility ===== */
        :focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .btn:focus-visible,
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Smooth transition for all interactive ===== */
        .btn,
        a,
        .card-custom,
        .solution-card,
        .process-step,
        .faq-question {
            transition: var(--transition);
        }

        /* ===== Misc ===== */
        .text-accent {
            color: var(--accent);
        }
        .bg-accent-soft {
            background: var(--accent-soft);
        }
        .rounded-custom {
            border-radius: var(--border-radius);
        }
        .shadow-custom {
            box-shadow: var(--shadow-md);
        }

        /* ===== Back to Top (optional) ===== */
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            border: none;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            z-index: 1040;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b4f6c;
            --primary-light: #1a7a9e;
            --primary-dark: #083349;
            --accent: #f4a261;
            --accent-light: #f8c48a;
            --accent-dark: #e07c2f;
            --bg-light: #f8fafc;
            --bg-dark: #0b1a24;
            --text-dark: #1a2a3a;
            --text-muted: #5a6a7a;
            --text-light: #f0f4f8;
            --border-color: #dee6ed;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(11, 79, 108, 0.06);
            --shadow-md: 0 6px 24px rgba(11, 79, 108, 0.10);
            --shadow-lg: 0 12px 40px rgba(11, 79, 108, 0.14);
            --transition: all 0.25s ease;
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

        body {
            font-family: var(--font-sans);
            color: var(--text-dark);
            background: #ffffff;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 导航 ===== */
        .navbar-custom {
            background: #ffffff;
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            height: 72px;
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(6px);
            background: rgba(255, 255, 255, 0.96);
        }
        .navbar-custom .navbar-brand {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
        }
        .navbar-custom .navbar-brand .brand-dot {
            color: var(--accent);
            font-size: 2rem;
            line-height: 1;
            margin-left: 2px;
        }
        .navbar-custom .navbar-brand:hover {
            color: var(--primary);
            text-decoration: none;
        }
        .navbar-custom .navbar-nav .nav-link {
            font-weight: 500;
            color: var(--text-muted);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .navbar-custom .navbar-nav .nav-link:hover,
        .navbar-custom .navbar-nav .nav-link:focus {
            color: var(--primary-dark);
            background: rgba(11, 79, 108, 0.04);
            text-decoration: none;
        }
        .navbar-custom .navbar-nav .nav-link.active {
            color: var(--primary-dark);
            background: rgba(11, 79, 108, 0.06);
        }
        .navbar-custom .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 1rem;
            right: 1rem;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .navbar-custom .nav-cta {
            background: var(--accent);
            color: #ffffff !important;
            padding: 0.5rem 1.2rem !important;
            border-radius: 40px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .navbar-custom .nav-cta:hover {
            background: var(--accent-dark);
            color: #fff !important;
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
            text-decoration: none;
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 1.4rem;
            color: var(--primary-dark);
            padding: 0.25rem 0.5rem;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--accent);
        }
        @media (max-width: 991.98px) {
            .navbar-custom {
                height: 64px;
            }
            .navbar-custom .navbar-brand {
                font-size: 1.3rem;
            }
            #navMain {
                background: #ffffff;
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-lg);
                padding: 1rem;
                margin-top: 0.5rem;
                border: 1px solid var(--border-color);
            }
            .navbar-custom .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar-custom .nav-cta {
                margin-top: 0.5rem;
                justify-content: center;
            }
        }
        @media (max-width: 575.98px) {
            .navbar-custom .navbar-brand {
                font-size: 1.1rem;
            }
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 0 60px;
            background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            isolation: isolate;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 36, 0.82) 0%, rgba(11, 79, 108, 0.70) 100%);
            z-index: 0;
        }
        .article-banner .container {
            position: relative;
            z-index: 1;
        }
        .article-banner .article-category {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            letter-spacing: 0.03em;
            margin-bottom: 1rem;
        }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.25;
            max-width: 880px;
            margin: 0 auto 1rem;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
        }
        .article-banner .article-meta {
            color: rgba(255, 255, 255, 0.80);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.8rem;
            flex-wrap: wrap;
        }
        .article-banner .article-meta i {
            margin-right: 4px;
            color: var(--accent-light);
        }
        .article-banner .article-meta span {
            display: inline-flex;
            align-items: center;
        }
        @media (max-width: 991.98px) {
            .article-banner {
                min-height: 240px;
                padding: 60px 0 40px;
            }
            .article-banner h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 575.98px) {
            .article-banner {
                min-height: 200px;
                padding: 50px 0 30px;
            }
            .article-banner h1 {
                font-size: 1.5rem;
            }
            .article-banner .article-meta {
                font-size: 0.82rem;
                gap: 0.5rem;
            }
        }

        /* ===== 文章正文 ===== */
        .article-main {
            padding: 60px 0 40px;
            background: #ffffff;
        }
        .article-body {
            max-width: 820px;
            margin: 0 auto;
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-dark);
        }
        .article-body p {
            margin-bottom: 1.6rem;
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 700;
            color: var(--primary-dark);
        }
        .article-body h2 {
            font-size: 1.7rem;
        }
        .article-body h3 {
            font-size: 1.35rem;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 1.8rem auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-light);
            padding: 1.2rem 1.8rem;
            margin: 1.8rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.6rem;
            padding-left: 1.6rem;
        }
        .article-body li {
            margin-bottom: 0.4rem;
        }
        .article-body a {
            color: var(--primary-light);
            font-weight: 500;
            border-bottom: 1px solid rgba(11, 122, 158, 0.25);
        }
        .article-body a:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
            text-decoration: none;
        }
        .article-body code {
            background: var(--bg-light);
            padding: 0.2rem 0.5rem;
            border-radius: var(--radius-sm);
            font-size: 0.9em;
            color: var(--accent-dark);
        }
        .article-body pre {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.8rem 0;
            font-size: 0.9rem;
        }

        /* ===== 文章底部 ===== */
        .article-footer-bar {
            max-width: 820px;
            margin: 0 auto;
            padding: 1.5rem 0;
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .article-footer-bar .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .article-footer-bar .tag {
            background: var(--bg-light);
            color: var(--text-muted);
            font-size: 0.82rem;
            padding: 0.25rem 0.8rem;
            border-radius: 30px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-footer-bar .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            text-decoration: none;
        }
        .article-footer-bar .share-buttons {
            display: flex;
            gap: 0.6rem;
        }
        .article-footer-bar .share-buttons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-light);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            font-size: 1rem;
        }
        .article-footer-bar .share-buttons a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            text-decoration: none;
        }
        @media (max-width: 575.98px) {
            .article-footer-bar {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ===== 无文章提示 ===== */
        .not-found-box {
            max-width: 640px;
            margin: 80px auto;
            text-align: center;
            padding: 3rem 2rem;
            background: var(--bg-light);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }
        .not-found-box i {
            font-size: 3.6rem;
            color: var(--accent);
            margin-bottom: 1.2rem;
        }
        .not-found-box h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 0.8rem;
        }
        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }
        .not-found-box .btn-home {
            background: var(--primary);
            color: #fff;
            padding: 0.6rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
            border: none;
        }
        .not-found-box .btn-home:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            text-decoration: none;
            color: #fff;
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 60px 0 70px;
            background: var(--bg-light);
        }
        .related-section .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 0.5rem;
        }
        .related-section .section-sub {
            color: var(--text-muted);
            margin-bottom: 2.5rem;
            font-size: 1rem;
        }
        .related-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .related-card .card-img {
            height: 190px;
            object-fit: cover;
            width: 100%;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 1.2rem 1.3rem 1.4rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body .card-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.3rem;
        }
        .related-card .card-body h5 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .related-card .card-body h5 a {
            color: inherit;
        }
        .related-card .card-body h5 a:hover {
            color: var(--primary);
            text-decoration: none;
        }
        .related-card .card-body .card-text {
            color: var(--text-muted);
            font-size: 0.88rem;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.8rem;
        }
        .related-card .card-body .card-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .related-card .card-body .card-meta i {
            color: var(--primary-light);
        }
        @media (max-width: 767.98px) {
            .related-card .card-img {
                height: 160px;
            }
            .related-section .section-title {
                font-size: 1.4rem;
            }
        }

        /* ===== CTA 区域 ===== */
        .cta-section {
            padding: 70px 0;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            isolation: isolate;
            position: relative;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 26, 36, 0.82);
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 1.8rem;
        }
        .cta-section .btn-cta {
            background: var(--accent);
            color: #fff;
            font-size: 1.05rem;
            font-weight: 600;
            padding: 0.8rem 2.6rem;
            border-radius: 40px;
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(244, 162, 97, 0.35);
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(244, 162, 97, 0.45);
            text-decoration: none;
            color: #fff;
        }
        .cta-section .btn-cta:focus-visible {
            outline: 3px solid #fff;
            outline-offset: 4px;
        }
        .cta-section .cta-note {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.85rem;
            margin-top: 1rem;
        }
        @media (max-width: 575.98px) {
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-cta {
                font-size: 0.95rem;
                padding: 0.6rem 1.8rem;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #0d1b26;
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 30px;
            font-size: 0.92rem;
        }
        .footer .footer-brand {
            font-size: 1.6rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.6rem;
            letter-spacing: -0.02em;
        }
        .footer .footer-brand .brand-dot {
            color: var(--accent);
        }
        .footer .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 340px;
        }
        .footer .footer-heading {
            font-size: 1rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 0.8rem;
            letter-spacing: 0.02em;
        }
        .footer .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }
        .footer .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition);
        }
        .footer .footer-links a:hover {
            color: var(--accent);
            text-decoration: none;
            padding-left: 4px;
        }
        .footer .footer-social {
            display: flex;
            gap: 0.7rem;
        }
        .footer .footer-social a {
            display: inline-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, 0.7);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-3px);
            text-decoration: none;
        }
        .footer .footer-divider {
            border-color: rgba(255, 255, 255, 0.08);
            margin: 2rem 0;
        }
        .footer .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.82rem;
        }
        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .footer .footer-bottom a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        @media (max-width: 767.98px) {
            .footer .footer-brand {
                font-size: 1.3rem;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 通用工具 ===== */
        .bg-soft-primary {
            background: rgba(11, 79, 108, 0.04);
        }
        .text-accent {
            color: var(--accent);
        }
        .fw-700 {
            font-weight: 700;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .gap-1 {
            gap: 0.4rem;
        }
        .gap-2 {
            gap: 0.8rem;
        }
        .rounded-pill {
            border-radius: 40px !important;
        }
        .shadow-hover:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .transition-base {
            transition: var(--transition);
        }