/* roulang page: index */
:root {
            --primary-500: #3D8FE0;
            --primary-600: #2E6FAD;
            --primary-700: #1F5A8C;
            --primary-50: #EDF5FC;
            --accent-500: #F5A563;
            --accent-50: #FDF1E7;
            --success-600: #2E8F82;
            --background: #F7FAFD;
            --surface: #FFFFFF;
            --text-1: #263544;
            --text-2: #44596C;
            --text-3: #71879B;
            --border: #E1E9F1;
            --shadow-sm: 0 2px 8px rgba(30, 46, 61, .04);
            --shadow-md: 0 6px 20px rgba(30, 46, 61, .07);
            --shadow-lg: 0 12px 32px rgba(30, 46, 61, .09);
            --bs-primary: #3D8FE0;
            --bs-primary-rgb: 61, 143, 224;
            --bs-border-radius: 16px;
            --bs-body-color: #263544;
            --bs-body-color-rgb: 38, 53, 68;
            --bs-body-bg: #F7FAFD;
            --bs-btn-border-radius: 8px;
            --bs-link-color: #2E6FAD;
            --bs-link-hover-color: #1F5A8C;
            --bs-focus-ring-color: rgba(61, 143, 224, .25);
            --bs-border-color: #E1E9F1;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--background);
            color: var(--text-1);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            transition: color .2s ease;
        }

        .container {
            max-width: 1180px;
        }

        .btn {
            font-weight: 600;
            letter-spacing: .02em;
            padding: 10px 22px;
            border-radius: 8px;
            transition: all .25s ease;
        }

        .btn-lg {
            padding: 14px 30px;
            font-size: 16px;
        }

        .btn-primary {
            --bs-btn-bg: var(--primary-500);
            --bs-btn-border-color: var(--primary-500);
            --bs-btn-hover-bg: var(--primary-600);
            --bs-btn-hover-border-color: var(--primary-600);
            --bs-btn-active-bg: var(--primary-700);
            --bs-btn-active-border-color: var(--primary-700);
            --bs-btn-disabled-bg: var(--primary-500);
            --bs-btn-disabled-border-color: var(--primary-500);
            box-shadow: 0 4px 14px rgba(61, 143, 224, .2);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(61, 143, 224, .3);
        }

        .btn-outline-primary {
            --bs-btn-color: var(--primary-600);
            --bs-btn-border-color: var(--primary-500);
            --bs-btn-hover-bg: var(--primary-500);
            --bs-btn-hover-border-color: var(--primary-500);
            --bs-btn-active-bg: var(--primary-600);
            --bs-btn-active-border-color: var(--primary-600);
        }

        .btn-outline-primary:hover {
            transform: translateY(-2px);
        }

        .btn-header-cta {
            font-size: 14px;
            padding: 8px 18px;
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: box-shadow .3s ease, background .3s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, .98);
            border-bottom-color: var(--border);
            box-shadow: var(--shadow-sm);
        }

        .navbar {
            min-height: 64px;
            padding: 0;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 10px 0;
        }

        .brand-mark {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
            border-radius: 10px;
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            box-shadow: 0 4px 10px rgba(61, 143, 224, .3);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-1);
            letter-spacing: .01em;
            line-height: 1.2;
        }

        .navbar-nav {
            gap: 4px;
        }

        .navbar-nav .nav-link {
            font-size: 15px;
            color: var(--text-2);
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: all .25s ease;
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary-600);
            background: var(--primary-50);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary-700);
            background: var(--primary-50);
            font-weight: 600;
        }

        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(61, 143, 224, .15);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23263544' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 150px 0 90px;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(247, 250, 253, .97) 0%, rgba(247, 250, 253, .92) 50%, rgba(247, 250, 253, .82) 100%);
            z-index: 0;
        }

        .hero-section .container {
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 7px 16px;
            font-size: 13px;
            color: var(--primary-700);
            font-weight: 600;
            box-shadow: var(--shadow-sm);
            margin-bottom: 20px;
        }

        .hero-badge i {
            color: var(--success-600);
        }

        .hero-section h1 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-1);
            margin-bottom: 20px;
            letter-spacing: .01em;
        }

        .hero-sub {
            font-size: 18px;
            color: var(--text-2);
            line-height: 1.7;
            max-width: 540px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 22px;
        }

        .hero-trust span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-2);
        }

        .hero-trust i {
            color: var(--primary-500);
            font-size: 16px;
        }

        .hero-visual {
            position: relative;
        }

        .hero-visual>img {
            width: 100%;
            border-radius: 20px;
            box-shadow: var(--shadow-lg);
            border: 4px solid rgba(255, 255, 255, .7);
        }

        .hero-float-card {
            position: absolute;
            left: -20px;
            bottom: 24px;
            background: var(--surface);
            border-radius: 16px;
            padding: 16px 20px;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            gap: 12px;
            max-width: 250px;
        }

        .hero-float-card .float-icon {
            width: 42px;
            height: 42px;
            background: var(--accent-50);
            color: var(--accent-500);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .hero-float-card strong {
            font-size: 14px;
            color: var(--text-1);
            display: block;
        }

        .hero-float-card p {
            font-size: 12px;
            color: var(--text-3);
            margin: 3px 0 0;
        }

        /* ===== Section ===== */
        .section-padding {
            padding: 72px 0;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }

        .section-overline {
            display: inline-block;
            color: var(--primary-600);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: .04em;
            margin-bottom: 12px;
            padding: 4px 14px;
            border-radius: 999px;
            background: var(--primary-50);
        }

        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-1);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-2);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== Solution Cards ===== */
        .solutions-section {
            padding: 72px 0;
            background: var(--surface);
        }

        .solution-card {
            position: relative;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 34px 28px 28px;
            height: 100%;
            transition: all .3s ease;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }

        .solution-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(61, 143, 224, .25);
        }

        .solution-num {
            position: absolute;
            top: 14px;
            right: 18px;
            font-size: 52px;
            font-weight: 800;
            color: var(--primary-50);
            line-height: 1;
            z-index: 0;
        }

        .solution-icon {
            position: relative;
            z-index: 1;
            width: 64px;
            height: 64px;
            background: var(--primary-50);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-600);
            font-size: 24px;
            margin-bottom: 22px;
            transition: transform .3s ease;
        }

        .solution-card:hover .solution-icon {
            transform: scale(1.05) rotate(-3deg);
        }

        .solution-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-1);
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .solution-card p {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.7;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .solution-card>a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-600);
            position: relative;
            z-index: 1;
            transition: gap .25s ease;
        }

        .solution-card>a:hover {
            color: var(--primary-700);
            gap: 12px;
        }

        /* ===== Metrics ===== */
        .metrics-section {
            background: var(--primary-50);
            padding: 60px 0;
            border-top: 1px solid rgba(61, 143, 224, .08);
            border-bottom: 1px solid rgba(61, 143, 224, .08);
        }

        .metric-item {
            text-align: center;
            padding: 20px 16px;
        }

        .metric-num {
            font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
            font-size: 40px;
            font-weight: 700;
            color: var(--primary-700);
            line-height: 1.2;
            letter-spacing: -.02em;
        }

        .metric-label {
            font-size: 14px;
            color: var(--text-3);
            margin-top: 8px;
            font-weight: 500;
        }

        /* ===== CTA Panel ===== */
        .cta-panel-section {
            padding: 72px 0 40px;
        }

        .cta-panel {
            background: linear-gradient(135deg, var(--primary-50) 0%, var(--surface) 60%);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 56px 32px;
            text-align: center;
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: .05;
            pointer-events: none;
        }

        .cta-panel .cta-content {
            position: relative;
            z-index: 1;
        }

        .cta-panel h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-1);
            margin-bottom: 12px;
        }

        .cta-panel p {
            font-size: 16px;
            color: var(--text-2);
            margin-bottom: 26px;
        }

        /* ===== Privacy ===== */
        .privacy-section {
            padding: 0 0 48px;
        }

        .privacy-note {
            display: flex;
            align-items: center;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            background: var(--surface);
            border: 1px dashed var(--border);
            border-radius: 12px;
            padding: 16px 24px;
            color: var(--text-3);
            font-size: 13px;
            line-height: 1.7;
        }

        .privacy-note i {
            color: var(--success-600);
            font-size: 16px;
        }

        .privacy-note p {
            margin: 0;
            text-align: center;
        }

        /* ===== News ===== */
        .news-section {
            padding: 72px 0;
            background: var(--background);
        }

        .news-feature-card {
            background: var(--surface);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border);
            height: 100%;
            transition: transform .3s ease, box-shadow .3s ease;
            box-shadow: var(--shadow-sm);
        }

        .news-feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .feature-thumb {
            overflow: hidden;
            background: var(--primary-50);
        }

        .feature-thumb img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
            transition: transform .4s ease;
        }

        .news-feature-card:hover .feature-thumb img {
            transform: scale(1.03);
        }

        .feature-body {
            padding: 28px;
        }

        .feature-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-1);
            margin: 14px 0 10px;
            line-height: 1.4;
        }

        .feature-body h3 a {
            color: var(--text-1);
        }

        .feature-body h3 a:hover {
            color: var(--primary-600);
        }

        .feature-body p {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.7;
            margin-bottom: 18px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .feature-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: var(--text-3);
        }

        .feature-meta a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--primary-600);
            font-size: 14px;
        }

        .feature-meta a:hover {
            color: var(--primary-700);
        }

        .news-list-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 20px 24px;
            margin-bottom: 14px;
            transition: all .3s ease;
            box-shadow: var(--shadow-sm);
        }

        .news-list-item:last-child {
            margin-bottom: 0;
        }

        .news-list-item:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(61, 143, 224, .25);
            transform: translateX(4px);
        }

        .news-list-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-1);
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .news-list-item h4 a {
            color: var(--text-1);
        }

        .news-list-item h4 a:hover {
            color: var(--primary-600);
        }

        .news-list-item p {
            font-size: 13px;
            color: var(--text-2);
            margin-bottom: 10px;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-list-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-3);
        }

        .news-date {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .badge-soft {
            display: inline-flex;
            align-items: center;
            background: var(--primary-50);
            color: var(--primary-700);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 999px;
        }

        .news-more-link {
            margin-top: 18px;
            text-align: right;
        }

        .news-more-link a {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-600);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-more-link a:hover {
            color: var(--primary-700);
        }

        .news-empty {
            background: var(--surface);
            border: 1px dashed var(--border);
            border-radius: 16px;
            padding: 40px 24px;
            text-align: center;
            color: var(--text-3);
        }

        .news-empty i {
            font-size: 36px;
            color: var(--primary-300, #9CC5EC);
            margin-bottom: 12px;
            display: block;
        }

        .news-empty p {
            margin: 0;
            font-size: 15px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 72px 0;
            background: var(--surface);
            border-top: 1px solid var(--border);
        }

        .accordion-item {
            border: 1px solid var(--border);
            border-radius: 12px !important;
            margin-bottom: 14px;
            overflow: hidden;
            background: var(--surface);
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s ease;
        }

        .accordion-item:hover {
            box-shadow: var(--shadow-md);
        }

        .accordion-item:first-of-type,
        .accordion-item:last-of-type {
            border-radius: 12px !important;
        }

        .accordion-button {
            background: var(--surface);
            color: var(--text-1);
            font-size: 16px;
            font-weight: 600;
            padding: 20px 24px;
            box-shadow: none;
            border-radius: 12px !important;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(61, 143, 224, .15);
            border-color: transparent;
        }

        .accordion-button:not(.collapsed) {
            background: var(--primary-50);
            color: var(--primary-700);
        }

        .accordion-button::after {
            background-image: none !important;
            content: '+';
            font-family: system-ui, sans-serif;
            font-size: 22px;
            font-weight: 300;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-600);
            transition: transform .25s ease;
        }

        .accordion-button:not(.collapsed)::after {
            content: '−';
            font-size: 22px;
            transform: none;
            color: var(--primary-700);
        }

        .accordion-body {
            padding: 20px 24px;
            color: var(--text-2);
            font-size: 15px;
            line-height: 1.75;
            background: var(--surface);
            border-top: 1px solid rgba(225, 233, 241, .6);
        }

        /* ===== CTA Bottom ===== */
        .cta-bottom-section {
            padding: 60px 0;
            background: var(--primary-50);
            border-top: 1px solid var(--border);
        }

        .cta-bottom {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-bottom h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-1);
            margin-bottom: 10px;
        }

        .cta-bottom p {
            font-size: 15px;
            color: var(--text-2);
            margin-bottom: 24px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #263544;
            color: rgba(255, 255, 255, .68);
            padding: 64px 0 24px;
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .site-footer .brand-text {
            color: #fff;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 0;
        }

        .footer-title {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: .02em;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, .6);
            transition: color .2s ease;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-links i {
            color: rgba(255, 255, 255, .4);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 20px;
            margin-top: 48px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

        /* ===== Modal ===== */
        .modal-content {
            border: none;
            border-radius: 20px;
            padding: 8px;
            box-shadow: var(--shadow-lg);
        }

        .modal-header {
            border-bottom: 1px solid var(--border);
            padding: 20px 24px 14px;
        }

        .modal-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-1);
        }

        .btn-close-gray {
            background: transparent;
            border: none;
            width: 36px;
            height: 36px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-3);
            font-size: 18px;
            transition: all .2s ease;
            margin: 0;
        }

        .btn-close-gray:hover {
            background: var(--primary-50);
            color: var(--text-1);
        }

        .modal-body {
            padding: 24px;
        }

        .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-1);
            margin-bottom: 6px;
        }

        .form-control {
            border-radius: 8px;
            border-color: var(--border);
            padding: 12px 14px;
            font-size: 14px;
            transition: all .2s ease;
        }

        .form-control:focus {
            border-color: var(--primary-500);
            box-shadow: 0 0 0 3px rgba(61, 143, 224, .12);
        }

        .privacy-consent {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--text-3);
            margin: 16px 0;
            line-height: 1.6;
        }

        .privacy-consent i {
            color: var(--success-600);
        }

        .modal-footer {
            border-top: none;
            padding: 0 24px 24px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .hero-section {
                padding: 130px 0 60px;
            }

            .hero-section h1 {
                font-size: 32px;
            }

            .navbar-collapse {
                background: var(--surface);
                border-radius: 12px;
                padding: 16px;
                margin-top: 8px;
                border: 1px solid var(--border);
                box-shadow: var(--shadow-md);
            }

            .navbar-nav {
                gap: 2px;
            }

            .navbar-nav .nav-link {
                padding: 10px 14px !important;
            }

            .btn-header-cta {
                margin: 10px 0 4px;
                width: 100%;
            }

            .hero-float-card {
                left: 12px;
                bottom: 14px;
            }
        }

        @media (max-width: 767.98px) {
            .section-padding,
            .solutions-section,
            .news-section,
            .faq-section {
                padding: 48px 0;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .section-head {
                margin-bottom: 32px;
            }

            .hero-section {
                padding: 120px 0 50px;
            }

            .hero-section h1 {
                font-size: 28px;
            }

            .hero-sub {
                font-size: 16px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .metric-num {
                font-size: 30px;
            }

            .cta-panel {
                padding: 40px 20px;
            }

            .cta-panel h2 {
                font-size: 24px;
            }

            .privacy-note {
                text-align: left;
                padding: 14px 18px;
            }

            .site-footer {
                padding: 44px 0 20px;
            }

            .footer-bottom {
                margin-top: 32px;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .hero-section h1 {
                font-size: 26px;
            }

            .hero-trust {
                gap: 14px;
            }

            .hero-visual {
                margin-top: 10px;
            }

            .hero-float-card {
                padding: 12px 16px;
            }

            .hero-float-card .float-icon {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }

            .feature-body {
                padding: 20px;
            }

            .news-list-item {
                padding: 16px 18px;
            }
        }

/* roulang page: category1 */
:root {
            --primary-500: #3D8FE0;
            --primary-600: #2E6FAD;
            --primary-700: #1F5A8C;
            --primary-50: #EDF5FC;
            --accent-500: #F5A563;
            --accent-50: #FDF1E7;
            --success-600: #2E8F82;
            --background: #F7FAFD;
            --surface: #FFFFFF;
            --text-1: #263544;
            --text-2: #44596C;
            --text-3: #71879B;
            --border: #E1E9F1;
            --shadow-sm: 0 2px 8px rgba(30,46,61,.04);
            --shadow-md: 0 6px 20px rgba(30,46,61,.07);
            --shadow-lg: 0 12px 32px rgba(30,46,61,.09);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --section-space: 72px;
            --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-mono: ui-monospace, SFMono-Regular, Consolas, monospace;
            --bs-primary: #3D8FE0;
            --bs-primary-rgb: 61, 143, 224;
            --bs-border-radius: .375rem;
            --bs-body-color: #44596C;
            --bs-body-bg: #F7FAFD;
            --bs-btn-border-radius: 8px;
            --bs-link-color: #2E6FAD;
            --bs-link-hover-color: #1F5A8C;
            --bs-focus-ring-color: rgba(61, 143, 224, .25);
        }

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

        body {
            margin: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-2);
            background: var(--background);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            vertical-align: middle;
        }

        a {
            color: var(--primary-600);
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: var(--primary-700);
        }

        .container {
            max-width: 1180px;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-1);
            line-height: 1.3;
            font-weight: 700;
            margin-top: 0;
            margin-bottom: .75rem;
        }

        .section {
            padding: var(--section-space) 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-3);
            max-width: 620px;
            margin-bottom: 40px;
            line-height: 1.7;
        }

        .text-primary {
            color: var(--primary-600) !important;
        }

        .text-muted-custom {
            color: var(--text-3) !important;
        }

        .badge-soft {
            display: inline-block;
            padding: 6px 14px;
            background: var(--primary-50);
            color: var(--primary-700);
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-badge);
            letter-spacing: .02em;
        }

        .badge-accent {
            display: inline-block;
            padding: 6px 14px;
            background: var(--accent-50);
            color: var(--accent-500);
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-badge);
            letter-spacing: .02em;
        }

        .icon-box {
            width: 64px;
            height: 64px;
            background: var(--primary-50);
            color: var(--primary-600);
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            flex-shrink: 0;
        }

        .icon-box-sm {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            font-size: 18px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(255, 255, 255, .96);
            border-bottom: 1px solid var(--border);
            backdrop-filter: blur(8px);
            transition: box-shadow .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 6px 24px rgba(30, 46, 61, .08);
        }

        .site-header .navbar {
            padding: 12px 0;
            min-height: 64px;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            line-height: 1.2;
            color: var(--text-1);
            padding: 0;
            margin-right: 24px;
        }

        .navbar-brand:hover {
            color: var(--text-1);
        }

        .brand-mark {
            width: 38px;
            height: 38px;
            background: var(--primary-50);
            color: var(--primary-600);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            flex-shrink: 0;
        }

        .brand-text {
            letter-spacing: .01em;
            white-space: nowrap;
        }

        .site-header .nav-link {
            color: var(--text-2);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 8px;
            transition: color .2s ease, background .2s ease;
        }

        .site-header .nav-link:hover {
            color: var(--primary-600);
            background: var(--primary-50);
        }

        .site-header .nav-link.active {
            color: var(--primary-600);
            background: var(--primary-50);
            font-weight: 600;
        }

        .btn-header-cta {
            padding: 9px 20px;
            font-weight: 600;
            font-size: 14px;
            border-radius: var(--radius-btn);
        }

        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(61, 143, 224, .2);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23d1dbe6' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background: #fff;
                border: 1px solid var(--border);
                border-radius: 14px;
                padding: 16px;
                margin-top: 12px;
                box-shadow: var(--shadow-md);
            }
            .site-header .nav-link {
                padding: 10px 14px;
            }
            .btn-header-cta {
                margin-top: 12px;
                width: 100%;
                text-align: center;
            }
        }

        /* ===== Category Banner ===== */
        .category-banner {
            position: relative;
            padding: 84px 0 72px;
            background:
                linear-gradient(to bottom, rgba(247, 250, 253, .94), rgba(237, 245, 252, .9)),
                url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
            border-bottom: 1px solid rgba(225, 233, 241, .7);
        }

        .category-banner .breadcrumb {
            margin-bottom: 18px;
            font-size: 14px;
        }

        .category-banner .breadcrumb a {
            color: var(--text-3);
        }

        .category-banner .breadcrumb a:hover {
            color: var(--primary-600);
        }

        .breadcrumb-item + .breadcrumb-item::before {
            color: var(--text-3);
            content: "/";
        }

        .banner-title {
            font-size: 42px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            color: var(--text-1);
        }

        .banner-lead {
            font-size: 18px;
            line-height: 1.7;
            color: var(--text-2);
            max-width: 640px;
            margin-bottom: 28px;
        }

        .banner-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            margin-top: 28px;
        }

        .banner-trust span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-3);
            background: rgba(255, 255, 255, .72);
            border: 1px solid rgba(225, 233, 241, .8);
            padding: 8px 14px;
            border-radius: var(--radius-badge);
            backdrop-filter: blur(4px);
        }

        .banner-trust i {
            color: var(--primary-500);
        }

        .banner-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 12px;
        }

        @media (max-width: 575.98px) {
            .category-banner {
                padding: 56px 0 44px;
            }
            .banner-title {
                font-size: 30px;
            }
            .banner-lead {
                font-size: 16px;
            }
            .banner-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .banner-actions .btn {
                width: 100%;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            padding: 11px 24px;
            transition: all .25s ease;
        }

        .btn-primary {
            --bs-btn-bg: var(--primary-500);
            --bs-btn-border-color: var(--primary-500);
            --bs-btn-color: #fff;
            --bs-btn-hover-bg: var(--primary-600);
            --bs-btn-hover-border-color: var(--primary-600);
            --bs-btn-hover-color: #fff;
            --bs-btn-active-bg: var(--primary-700);
            --bs-btn-active-border-color: var(--primary-700);
            --bs-btn-active-color: #fff;
            box-shadow: 0 4px 14px rgba(61, 143, 224, .25);
        }

        .btn-primary:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(61, 143, 224, .3);
        }

        .btn-outline-primary {
            --bs-btn-color: var(--primary-600);
            --bs-btn-border-color: var(--primary-500);
            --bs-btn-hover-bg: var(--primary-50);
            --bs-btn-hover-color: var(--primary-700);
            --bs-btn-hover-border-color: var(--primary-600);
            --bs-btn-active-bg: var(--primary-50);
            --bs-btn-active-color: var(--primary-700);
            --bs-btn-active-border-color: var(--primary-600);
        }

        .btn-outline-primary:hover {
            transform: translateY(-1px);
            background: var(--primary-50);
        }

        .btn-accent {
            background: var(--accent-500);
            border-color: var(--accent-500);
            color: #fff;
        }

        .btn-accent:hover {
            background: #e89450;
            border-color: #e89450;
            color: #fff;
            transform: translateY(-1px);
        }

        .btn:focus,
        .btn-primary:focus,
        .btn-outline-primary:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(61, 143, 224, .28);
        }

        /* ===== Value Grid ===== */
        .value-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            height: 100%;
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }

        .value-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(61, 143, 224, .25);
        }

        .value-card .number-label {
            position: absolute;
            top: 12px;
            right: 18px;
            font-family: var(--font-mono);
            font-size: 42px;
            font-weight: 800;
            color: var(--primary-50);
            line-height: 1;
            pointer-events: none;
        }

        .value-card .icon-box {
            margin-bottom: 20px;
        }

        .value-card h3 {
            font-size: 20px;
            margin-bottom: 10px;
        }

        .value-card p {
            font-size: 14px;
            color: var(--text-3);
            margin-bottom: 0;
            line-height: 1.7;
        }

        @media (max-width: 767.98px) {
            .value-card {
                padding: 28px 22px;
            }
        }

        /* ===== Strategy Modules (left/right alternating) ===== */
        .strategy-modules {
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .strategy-row {
            padding: 56px 0;
            border-bottom: 1px solid var(--border);
        }

        .strategy-row:last-child {
            border-bottom: none;
        }

        .strategy-row .section-subtitle {
            margin-bottom: 24px;
        }

        .strategy-media {
            border-radius: 18px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .strategy-media img {
            width: 100%;
            height: 300px;
            object-fit: cover;
            display: block;
        }

        .strategy-content {
            padding: 16px 8px;
        }

        .strategy-content .step-order {
            font-family: var(--font-mono);
            font-size: 15px;
            font-weight: 700;
            color: var(--primary-600);
            letter-spacing: .06em;
            display: inline-block;
            margin-bottom: 12px;
        }

        .strategy-content h3 {
            font-size: 24px;
            margin-bottom: 14px;
        }

        .strategy-content p {
            font-size: 15px;
            color: var(--text-3);
            line-height: 1.75;
            margin-bottom: 16px;
        }

        .strategy-features {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }

        .strategy-features li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-2);
            padding: 6px 0;
            line-height: 1.6;
        }

        .strategy-features li i {
            color: var(--success-600);
            font-size: 14px;
            margin-top: 5px;
            flex-shrink: 0;
        }

        .strategy-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            color: var(--primary-600);
            transition: color .2s ease, gap .2s ease;
        }

        .strategy-link:hover {
            color: var(--primary-700);
            gap: 12px;
        }

        @media (max-width: 991.98px) {
            .strategy-row {
                padding: 40px 0;
            }
            .strategy-media img {
                height: 240px;
            }
            .strategy-content {
                padding: 20px 0 0;
            }
        }

        /* ===== Scenes ===== */
        .scene-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 30px 26px;
            height: 100%;
            box-shadow: var(--shadow-sm);
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .scene-card .icon-box {
            background: var(--accent-50);
            color: var(--accent-500);
        }

        .scene-card h3 {
            font-size: 19px;
            margin-bottom: 10px;
        }

        .scene-card p {
            font-size: 14px;
            color: var(--text-3);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* ===== Process Steps ===== */
        .process-section {
            background: var(--primary-50);
        }

        .process-step {
            background: var(--surface);
            border-radius: var(--radius-card);
            border: 1px solid rgba(225, 233, 241, .6);
            padding: 28px 22px;
            height: 100%;
            box-shadow: var(--shadow-sm);
            position: relative;
            text-align: center;
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .process-step .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-50);
            color: var(--primary-700);
            font-family: var(--font-mono);
            font-size: 20px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }

        .process-step h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-3);
            margin-bottom: 0;
            line-height: 1.7;
        }

        @media (max-width: 767.98px) {
            .process-step {
                padding: 22px 16px;
            }
        }

        /* ===== FAQ Accordion ===== */
        .faq-section .accordion-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .25s ease;
        }

        .faq-section .accordion-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-section .accordion-button {
            background: var(--surface);
            color: var(--text-1);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            border-radius: 14px !important;
            box-shadow: none;
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .faq-section .accordion-button:not(.collapsed) {
            background: var(--primary-50);
            color: var(--primary-700);
            box-shadow: none;
        }

        .faq-section .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(61, 143, 224, .2);
            border-color: var(--primary-500);
        }

        .faq-section .accordion-button::after {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232E6FAD' stroke-width='2.5' stroke-linecap='round'%3e%3cpath d='M12 5v14M5 12h14'/%3e%3c/svg%3e");
            transition: transform .25s ease;
        }

        .faq-section .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232E6FAD' stroke-width='2.5' stroke-linecap='round'%3e%3cpath d='M12 5v14M5 12h14'/%3e%3c/svg%3e");
        }

        .faq-section .accordion-body {
            padding: 4px 24px 20px;
            color: var(--text-3);
            font-size: 15px;
            line-height: 1.7;
            background: var(--surface);
        }

        .faq-section .accordion-button:not(.collapsed) + .accordion-collapse .accordion-body {
            background: var(--primary-50);
            border-radius: 0 0 14px 14px;
        }

        @media (max-width: 575.98px) {
            .faq-section .accordion-button {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-section .accordion-body {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA Banner ===== */
        .cta-banner {
            padding: 64px 0;
            background:
                linear-gradient(to bottom, rgba(237, 245, 252, .96), rgba(247, 250, 253, .9)),
                url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            border-top: 1px solid var(--border);
        }

        .cta-inner {
            background: var(--surface);
            border-radius: 20px;
            padding: 52px 48px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
        }

        .cta-inner h2 {
            font-size: 28px;
            margin-bottom: 14px;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--text-3);
            max-width: 480px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        @media (max-width: 575.98px) {
            .cta-banner {
                padding: 40px 0;
            }
            .cta-inner {
                padding: 36px 22px;
                border-radius: 16px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                width: 100%;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--text-1);
            color: #9FB0BF;
            padding: 56px 0 0;
            font-size: 14px;
        }

        .site-footer .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .site-footer .brand-mark {
            background: rgba(255, 255, 255, .12);
            color: #fff;
        }

        .site-footer .brand-text {
            color: #fff;
        }

        .footer-desc {
            font-size: 14px;
            color: #9FB0BF;
            line-height: 1.7;
            max-width: 300px;
            margin-bottom: 0;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: #9FB0BF;
        }

        .footer-links a {
            color: #9FB0BF;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color .2s ease;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-links i {
            font-size: 12px;
            color: #6A7E91;
        }

        .footer-bottom {
            margin-top: 40px;
            padding: 18px 0;
            border-top: 1px solid rgba(255, 255, 255, .08);
            text-align: center;
            font-size: 13px;
            color: #7C8EA0;
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ===== Modal ===== */
        .modal-content {
            border: none;
            border-radius: 18px;
            box-shadow: 0 20px 56px rgba(30, 46, 61, .18);
            padding: 12px;
        }

        .modal-header {
            border-bottom: 1px solid var(--border);
            padding: 16px 20px;
        }

        .modal-title {
            font-size: 20px;
            font-weight: 700;
        }

        .btn-close {
            background: transparent;
            opacity: .7;
            border-radius: 8px;
            padding: 8px;
            width: 34px;
            height: 34px;
            transition: background .2s ease, opacity .2s ease;
        }

        .btn-close:hover {
            opacity: 1;
            background: var(--primary-50);
        }

        .modal-body {
            padding: 20px 20px 8px;
        }

        .modal-footer {
            border-top: none;
            padding: 8px 20px 20px;
            justify-content: center;
        }

        .form-label {
            font-weight: 500;
            font-size: 14px;
            color: var(--text-1);
            margin-bottom: 6px;
        }

        .form-control {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 10px 14px;
            font-size: 14px;
            color: var(--text-1);
            background: #fff;
            transition: border-color .2s ease, box-shadow .2s ease;
        }

        .form-control:focus {
            border-color: var(--primary-500);
            box-shadow: 0 0 0 3px rgba(61, 143, 224, .15);
            background: #fff;
            color: var(--text-1);
        }

        .privacy-note {
            font-size: 12px;
            color: var(--text-3);
            line-height: 1.6;
        }

        @media (max-width: 575.98px) {
            .modal-dialog {
                margin: 16px;
            }
            .modal-content {
                padding: 8px;
            }
        }

        /* ===== Animations ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity .5s ease, transform .5s ease;
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                transition: none !important;
                animation: none !important;
            }
        }

/* roulang page: article */
:root {
            --primary-500: #3D8FE0;
            --primary-600: #2E6FAD;
            --primary-700: #1F5A8C;
            --primary-50: #EDF5FC;
            --accent-500: #F5A563;
            --accent-50: #FDF1E7;
            --success-600: #2E8F82;
            --background: #F7FAFD;
            --surface: #FFFFFF;
            --text-1: #263544;
            --text-2: #44596C;
            --text-3: #71879B;
            --border: #E1E9F1;
            --shadow-sm: 0 2px 8px rgba(30,46,61,.04);
            --shadow-md: 0 6px 20px rgba(30,46,61,.07);
            --shadow-lg: 0 12px 32px rgba(30,46,61,.09);
            --bs-primary: #3D8FE0;
            --bs-primary-rgb: 61, 143, 224;
            --bs-border-radius: 16px;
            --bs-body-color: #263544;
            --bs-body-bg: #F7FAFD;
            --bs-btn-border-radius: 8px;
            --bs-link-color: #2E6FAD;
            --bs-link-hover-color: #1F5A8C;
            --bs-focus-ring-color: rgba(61,143,224,.25);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--background);
            color: var(--text-1);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary-600);
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: var(--primary-700);
        }

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

        .container {
            max-width: 1180px;
        }

        .btn {
            border-radius: 8px;
            font-weight: 500;
            padding: 10px 24px;
            transition: all .25s ease;
            border: none;
        }

        .btn-primary {
            background: var(--primary-500);
            color: #fff;
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-600);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(61, 143, 224, .25);
        }

        .btn-accent {
            background: var(--accent-500);
            color: #fff;
        }

        .btn-accent:hover,
        .btn-accent:focus {
            background: #E89352;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(245, 165, 99, .3);
        }

        .btn-light {
            background: #fff;
            color: var(--primary-600);
            border: 1px solid var(--border);
        }

        .btn-light:hover {
            background: var(--primary-50);
            color: var(--primary-700);
            border-color: var(--primary-500);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: box-shadow .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 16px rgba(30, 46, 61, .06);
        }

        .navbar {
            padding: 0;
            min-height: 64px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-1);
            letter-spacing: .01em;
        }

        .navbar-brand:hover {
            color: var(--primary-600);
        }

        .brand-mark {
            width: 40px;
            height: 40px;
            background: var(--primary-50);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-600);
            font-size: 18px;
            flex-shrink: 0;
        }

        .brand-text {
            color: var(--text-1);
            font-weight: 700;
            font-size: 20px;
            line-height: 1;
        }

        .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-2);
            padding: 10px 18px !important;
            border-radius: 8px;
            transition: all .2s ease;
            position: relative;
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary-600);
            background: var(--primary-50);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary-600);
            font-weight: 600;
            background: var(--primary-50);
        }

        .btn-header-cta {
            border-radius: 8px;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
        }

        .navbar-toggler {
            border: none;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(61, 143, 224, .15);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(38,53,68,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                padding: 12px 0 16px;
                border-top: 1px solid var(--border);
                margin-top: 8px;
            }

            .navbar-nav .nav-link {
                padding: 12px 14px !important;
            }

            .btn-header-cta {
                margin: 12px 0 0;
                width: 100%;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            background: var(--primary-50);
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }

        .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
            font-size: 13px;
            color: var(--text-3);
        }

        .breadcrumb-item a {
            color: var(--text-3);
            font-weight: 500;
            transition: color .2s;
        }

        .breadcrumb-item a:hover {
            color: var(--primary-600);
        }

        .breadcrumb-item.active {
            color: var(--text-2);
            font-weight: 500;
            max-width: 280px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .breadcrumb-item+.breadcrumb-item::before {
            content: "\f105";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--text-3);
            font-size: 12px;
            padding: 0 8px;
        }

        .breadcrumb-item:first-child a {
            font-weight: 500;
        }

        /* ===== Article Page ===== */
        .article-page {
            padding: 48px 0 64px;
        }

        .article-card {
            background: var(--surface);
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: 40px 44px;
            margin-bottom: 32px;
        }

        .article-header {
            margin-bottom: 24px;
        }

        .article-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-1);
            margin: 0 0 14px;
            letter-spacing: -0.01em;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 13px;
            color: var(--text-3);
            border-bottom: 1px solid var(--border);
            padding-bottom: 20px;
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .meta-item i {
            color: var(--primary-500);
            font-size: 14px;
        }

        .article-cover {
            margin-bottom: 28px;
            border-radius: 12px;
            overflow: hidden;
            background: var(--primary-50);
        }

        .article-cover-img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            aspect-ratio: 16/7;
        }

        /* Article content typography */
        .article-content {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-2);
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-1);
            margin: 38px 0 16px;
            line-height: 1.35;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-1);
            margin: 30px 0 14px;
            line-height: 1.4;
        }

        .article-content h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-1);
            margin: 24px 0 10px;
        }

        .article-content p {
            margin-bottom: 18px;
            color: var(--text-2);
        }

        .article-content a {
            color: var(--primary-600);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--primary-700);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary-500);
            background: var(--primary-50);
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 26px 0;
            color: var(--text-2);
            font-size: 15px;
            line-height: 1.7;
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content img {
            max-width: 100%;
            border-radius: 12px;
            margin: 26px 0;
            height: auto;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 22px;
            padding-left: 24px;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 8px;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }

        .article-content table th,
        .article-content table td {
            padding: 12px 14px;
            border: 1px solid var(--border);
            text-align: left;
        }

        .article-content table th {
            background: var(--primary-50);
            color: var(--text-1);
            font-weight: 600;
        }

        .article-content code {
            background: var(--primary-50);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 14px;
            color: var(--primary-700);
            font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
        }

        /* Empty state */
        .article-empty {
            text-align: center;
            padding: 60px 20px;
        }

        .empty-icon {
            width: 80px;
            height: 80px;
            background: var(--primary-50);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            color: var(--primary-500);
            font-size: 32px;
        }

        .article-empty .article-title {
            font-size: 26px;
            margin-bottom: 12px;
        }

        .empty-desc {
            color: var(--text-3);
            font-size: 15px;
            margin-bottom: 28px;
            max-width: 400px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Related ===== */
        .related-section {
            margin-bottom: 32px;
        }

        .section-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-1);
            margin-bottom: 24px;
            padding-left: 14px;
            border-left: 4px solid var(--primary-500);
            line-height: 1.4;
        }

        .related-list {
            list-style: none;
            padding: 0;
            margin: 0;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .related-item {
            border-bottom: 1px solid var(--border);
        }

        .related-item:last-child {
            border-bottom: none;
        }

        .related-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            transition: all .25s ease;
            color: var(--text-2);
        }

        .related-link:hover {
            background: var(--primary-50);
            color: var(--primary-600);
            padding-left: 26px;
        }

        .related-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-1);
            transition: color .2s;
        }

        .related-link:hover .related-title {
            color: var(--primary-600);
        }

        .related-date {
            font-size: 12px;
            color: var(--text-3);
            white-space: nowrap;
            background: var(--background);
            padding: 4px 12px;
            border-radius: 999px;
            border: 1px solid var(--border);
        }

        /* ===== CTA ===== */
        .article-cta {
            background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
            border-radius: 16px;
            padding: 40px 44px;
            margin-top: 40px;
            display: flex;
            align-items: center;
            gap: 24px;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .article-cta::after {
            content: "";
            position: absolute;
            right: -40px;
            bottom: -40px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
        }

        .cta-content {
            flex: 1;
            position: relative;
            z-index: 1;
        }

        .cta-icon {
            width: 56px;
            height: 56px;
            background: rgba(255, 255, 255, .15);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 24px;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
        }

        .cta-title {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 6px;
        }

        .cta-text {
            font-size: 14px;
            color: rgba(255, 255, 255, .85);
            margin: 0 0 16px;
        }

        .article-cta .btn {
            margin-right: 10px;
            margin-top: 8px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #F0F4F9;
            border-top: 1px solid var(--border);
            padding: 56px 0 0;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-1);
            margin-bottom: 12px;
        }

        .footer-brand .brand-mark {
            width: 38px;
            height: 38px;
            border-radius: 10px;
        }

        .footer-brand .brand-text {
            font-size: 18px;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-3);
            line-height: 1.7;
            margin: 0;
            max-width: 280px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-1);
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
            font-size: 14px;
            color: var(--text-2);
        }

        .footer-links a {
            color: var(--text-2);
            font-size: 14px;
            transition: all .2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-links a:hover {
            color: var(--primary-600);
            padding-left: 4px;
        }

        .footer-links i {
            color: var(--primary-500);
            font-size: 13px;
            width: 16px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 18px 0;
            margin-top: 40px;
            text-align: center;
        }

        .footer-bottom p {
            margin: 0;
            font-size: 13px;
            color: var(--text-3);
        }

        @media (max-width: 767.98px) {
            .footer-bottom {
                margin-top: 24px;
            }
        }

        /* ===== Modal ===== */
        .modal-content {
            border-radius: 16px;
            border: none;
            box-shadow: var(--shadow-lg);
        }

        .modal-header {
            border-bottom: 1px solid var(--border);
            padding: 18px 24px;
        }

        .modal-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-1);
        }

        .modal-body {
            padding: 24px;
        }

        .btn-close {
            background: transparent;
            border: none;
            font-size: 18px;
            color: var(--text-3);
            padding: 8px;
            border-radius: 8px;
            transition: all .2s;
        }

        .btn-close:hover {
            background: var(--primary-50);
            color: var(--primary-600);
            transform: rotate(90deg);
        }

        .form-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-2);
            margin-bottom: 6px;
        }

        .form-control {
            border-radius: 8px;
            border: 1px solid var(--border);
            padding: 10px 14px;
            font-size: 14px;
            color: var(--text-1);
            background: var(--background);
            transition: all .25s ease;
        }

        .form-control:focus {
            border-color: var(--primary-500);
            box-shadow: 0 0 0 3px rgba(61, 143, 224, .12);
            background: #fff;
        }

        .form-privacy {
            font-size: 12px;
            color: var(--text-3);
            margin: 14px 0 16px;
            display: flex;
            align-items: flex-start;
            gap: 6px;
            line-height: 1.6;
        }

        .form-privacy i {
            color: var(--success-600);
            margin-top: 3px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .article-page {
                padding: 32px 0 48px;
            }

            .article-card {
                padding: 30px 28px;
            }

            .article-title {
                font-size: 30px;
            }
        }

        @media (max-width: 767.98px) {
            .article-card {
                padding: 24px 20px;
            }

            .article-title {
                font-size: 26px;
            }

            .article-meta {
                gap: 14px;
                font-size: 12px;
            }

            .article-cta {
                padding: 30px 24px;
                flex-direction: column;
                gap: 14px;
            }

            .cta-icon {
                width: 48px;
                height: 48px;
                font-size: 20px;
            }

            .cta-title {
                font-size: 20px;
            }

            .cta-text {
                font-size: 13px;
            }

            .related-link {
                padding: 14px 16px;
            }

            .related-date {
                display: none;
            }

            .breadcrumb-item.active {
                max-width: 180px;
            }
        }

        @media (max-width: 575.98px) {
            .article-title {
                font-size: 24px;
            }

            .article-meta {
                gap: 12px;
            }

            .meta-item i {
                font-size: 12px;
            }

            .article-cta .btn {
                width: 100%;
                margin-right: 0;
                margin-top: 6px;
            }

            .article-content {
                font-size: 15px;
                line-height: 1.7;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 18px;
            }

            .breadcrumb-wrap {
                padding: 10px 0;
            }
        }

/* roulang page: category2 */
:root {
            --primary-500: #3D8FE0;
            --primary-600: #2E6FAD;
            --primary-700: #1F5A8C;
            --primary-50: #EDF5FC;
            --accent-500: #F5A563;
            --accent-50: #FDF1E7;
            --success-600: #2E8F82;
            --background: #F7FAFD;
            --surface: #FFFFFF;
            --text-1: #263544;
            --text-2: #44596C;
            --text-3: #71879B;
            --border: #E1E9F1;
            --shadow-sm: 0 2px 8px rgba(30,46,61,.04);
            --shadow-md: 0 6px 20px rgba(30,46,61,.07);
            --shadow-lg: 0 12px 32px rgba(30,46,61,.09);
            --radius: 16px;
            --radius-btn: 8px;
            --radius-tag: 999px;
            --bs-primary: var(--primary-500);
            --bs-primary-rgb: 61, 143, 224;
            --bs-border-radius: 8px;
            --bs-body-color: var(--text-2);
            --bs-body-bg: var(--background);
            --bs-btn-border-radius: 8px;
            --bs-link-color: var(--primary-600);
            --bs-focus-ring-color: rgba(61, 143, 224, .25);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--background);
            color: var(--text-2);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-600);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-700);
        }
        img {
            max-width: 100%;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-1);
            line-height: 1.3;
            font-weight: 700;
        }
        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            padding: .625rem 1.4rem;
            transition: all .25s ease;
        }
        .btn-primary {
            background: var(--primary-500);
            border-color: var(--primary-500);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-600);
            border-color: var(--primary-600);
            box-shadow: 0 6px 18px rgba(61, 143, 224, .25);
        }
        .btn-outline-light {
            border-color: rgba(255, 255, 255, .75);
            color: #fff;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .15);
            border-color: #fff;
            color: #fff;
        }
        .btn:focus,
        .form-control:focus,
        .accordion-button:focus {
            box-shadow: 0 0 0 .25rem rgba(61, 143, 224, .18);
            border-color: var(--primary-500);
        }
        .form-control {
            border-radius: 8px;
            border-color: var(--border);
            padding: .6rem .9rem;
        }
        .form-control:focus {
            border-color: var(--primary-500);
        }
        .section-padding {
            padding: 72px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 40px 0;
            }
        }
        .section-header {
            margin-bottom: 40px;
            max-width: 680px;
        }
        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            background: var(--primary-50);
            color: var(--primary-700);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: var(--radius-tag);
            letter-spacing: .03em;
            margin-bottom: 14px;
        }
        .section-header h2 {
            font-size: 30px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 15px;
            color: var(--text-3);
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .section-header h2 {
                font-size: 24px;
            }
        }

        /* Header */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow .3s ease;
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }
        .navbar {
            padding: 10px 0;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-1);
        }
        .navbar-brand:hover {
            color: var(--primary-700);
        }
        .brand-mark {
            width: 38px;
            height: 38px;
            background: var(--primary-50);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-600);
            font-size: 16px;
        }
        .brand-text {
            font-weight: 700;
        }
        .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-2);
            padding: 8px 16px !important;
            border-radius: 6px;
            transition: all .2s ease;
            position: relative;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary-600);
            background: var(--primary-50);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary-700);
            font-weight: 600;
        }
        .navbar-nav .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary-500);
            border-radius: 2px;
        }
        .navbar-toggler {
            border: none;
            padding: 6px 8px;
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(38,53,68,.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        .btn-header-cta {
            padding: .5rem 1.1rem;
            font-size: 14px;
        }
        @media (max-width: 991px) {
            .btn-header-cta {
                margin-top: 10px;
                margin-left: 0 !important;
            }
        }

        /* Category Banner */
        .category-banner {
            position: relative;
            background: linear-gradient(90deg, rgba(31, 90, 140, .88) 0%, rgba(61, 143, 224, .68) 55%, rgba(245, 165, 99, .35) 100%),
                url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            padding: 76px 0 66px;
            color: #fff;
        }
        .category-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(247, 250, 253, .08);
            pointer-events: none;
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb-nav {
            margin-bottom: 28px;
        }
        .breadcrumb-nav .breadcrumb {
            margin-bottom: 0;
        }
        .breadcrumb-nav .breadcrumb-item {
            font-size: 14px;
        }
        .breadcrumb-nav .breadcrumb-item a {
            color: rgba(255, 255, 255, .82);
        }
        .breadcrumb-nav .breadcrumb-item a:hover {
            color: #fff;
        }
        .breadcrumb-nav .breadcrumb-item.active {
            color: rgba(255, 255, 255, .95);
        }
        .breadcrumb-nav .breadcrumb-item+.breadcrumb-item::before {
            color: rgba(255, 255, 255, .6);
        }
        .banner-tag {
            display: inline-block;
            background: rgba(255, 255, 255, .18);
            border: 1px solid rgba(255, 255, 255, .25);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            margin-bottom: 16px;
            letter-spacing: .04em;
        }
        .category-banner h1 {
            font-size: 40px;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 700;
            letter-spacing: .01em;
        }
        .category-banner p {
            font-size: 17px;
            color: rgba(255, 255, 255, .92);
            max-width: 580px;
            margin-bottom: 28px;
            line-height: 1.75;
        }
        .banner-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .btn-banner {
            padding: .7rem 1.6rem;
            font-size: 15px;
        }
        @media (max-width: 576px) {
            .category-banner {
                padding: 48px 0 42px;
            }
            .category-banner h1 {
                font-size: 30px;
            }
            .category-banner p {
                font-size: 15px;
            }
        }

        /* Service Overview */
        .service-overview {
            background: var(--surface);
        }
        .service-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px;
            height: 100%;
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
            opacity: 0;
            transition: opacity .3s ease;
        }
        .service-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(61, 143, 224, .3);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-card-icon {
            width: 60px;
            height: 60px;
            background: var(--primary-50);
            border-radius: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary-600);
            margin-bottom: 22px;
        }
        .service-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
        }
        .service-card>p {
            font-size: 14px;
            color: var(--text-3);
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .service-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .service-card ul li {
            font-size: 14px;
            color: var(--text-2);
            padding: 5px 0;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .service-card ul li i {
            color: var(--success-600);
            margin-top: 4px;
            font-size: 13px;
        }
        @media (max-width: 768px) {
            .service-card {
                padding: 24px;
            }
        }

        /* Feature Section */
        .feature-section {
            background: var(--background);
        }
        .feature-content .section-eyebrow {
            margin-bottom: 14px;
        }
        .feature-content h2 {
            font-size: 30px;
            margin-bottom: 16px;
        }
        .feature-content>p {
            font-size: 15px;
            color: var(--text-3);
            margin-bottom: 32px;
            max-width: 520px;
        }
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .feature-list li {
            display: flex;
            gap: 16px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
        }
        .feature-list li:last-child {
            border-bottom: none;
        }
        .feature-icon {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            background: var(--primary-50);
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-600);
            font-size: 17px;
        }
        .feature-list strong {
            display: block;
            font-size: 16px;
            color: var(--text-1);
            margin-bottom: 4px;
        }
        .feature-list p {
            font-size: 14px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.6;
        }
        .feature-image {
            border-radius: 18px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .feature-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        @media (max-width: 992px) {
            .feature-image {
                margin-top: 24px;
            }
        }

        /* Process Section */
        .process-section {
            background: var(--surface);
        }
        .process-step {
            background: var(--primary-50);
            border-radius: var(--radius);
            padding: 28px 24px;
            height: 100%;
            position: relative;
            transition: all .3s ease;
            border: 1px solid transparent;
        }
        .process-step:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(61, 143, 224, .25);
            transform: translateY(-3px);
        }
        .step-number {
            font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
            font-size: 32px;
            font-weight: 700;
            color: var(--primary-500);
            display: block;
            margin-bottom: 14px;
            opacity: .85;
        }
        .process-step h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.65;
        }
        @media (max-width: 768px) {
            .process-step {
                padding: 22px 18px;
            }
            .step-number {
                font-size: 26px;
            }
        }

        /* Guarantee Section */
        .guarantee-section {
            background: var(--primary-50);
        }
        .guarantee-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 32px 28px;
            height: 100%;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
            border: 1px solid transparent;
        }
        .guarantee-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: rgba(61, 143, 224, .2);
        }
        .guarantee-card i {
            font-size: 30px;
            color: var(--primary-600);
            background: var(--primary-50);
            width: 64px;
            height: 64px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }
        .guarantee-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }
        .guarantee-card p {
            font-size: 14px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.65;
        }
        @media (max-width: 768px) {
            .guarantee-card {
                padding: 24px 20px;
            }
        }

        /* FAQ Section */
        .faq-section {
            background: var(--surface);
        }
        .custom-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .custom-accordion .accordion-button {
            background: var(--surface);
            color: var(--text-1);
            font-weight: 600;
            font-size: 16px;
            padding: 18px 24px;
        }
        .custom-accordion .accordion-button:not(.collapsed) {
            background: var(--primary-50);
            color: var(--primary-700);
        }
        .custom-accordion .accordion-button::after {
            background-image: none;
            content: "+";
            font-family: system-ui, sans-serif;
            font-size: 22px;
            font-weight: 300;
            color: var(--primary-600);
            width: 24px;
            height: 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: transform .25s ease;
        }
        .custom-accordion .accordion-button:not(.collapsed)::after {
            content: "−";
            transform: rotate(0deg);
        }
        .custom-accordion .accordion-body {
            padding: 18px 24px 24px;
            font-size: 15px;
            color: var(--text-2);
            line-height: 1.75;
            background: var(--surface);
        }
        .custom-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: rgba(61, 143, 224, .3);
        }

        /* CTA Section */
        .cta-section {
            background: var(--background);
        }
        .cta-box {
            background: linear-gradient(120deg, var(--primary-700) 0%, var(--primary-500) 100%);
            border-radius: 20px;
            padding: 52px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            background: rgba(255, 255, 255, .08);
            border-radius: 50%;
        }
        .cta-box::after {
            content: "";
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 180px;
            height: 180px;
            background: rgba(245, 165, 99, .25);
            border-radius: 50%;
        }
        .cta-box h2 {
            font-size: 28px;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-box p {
            font-size: 16px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .btn-cta {
            padding: .7rem 1.8rem;
            font-size: 15px;
        }
        @media (max-width: 576px) {
            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h2 {
                font-size: 22px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--text-1);
            color: rgba(255, 255, 255, .72);
            padding: 56px 0 0;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .footer-brand .brand-mark {
            background: rgba(255, 255, 255, .12);
            color: #fff;
        }
        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 320px;
        }
        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
        }
        .footer-links a {
            color: rgba(255, 255, 255, .72);
            font-size: 14px;
            transition: all .2s ease;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 3px;
        }
        .footer-links i {
            margin-right: 6px;
            color: rgba(255, 255, 255, .4);
            font-size: 12px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            margin-top: 44px;
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
        }
        .footer-bottom p {
            margin: 0;
        }

        /* Modal */
        .modal-content {
            border-radius: 16px;
            border: none;
            box-shadow: var(--shadow-lg);
        }
        .modal-header {
            border-bottom: 1px solid var(--border);
            padding: 20px 24px 12px;
        }
        .modal-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-1);
        }
        .modal-body {
            padding: 20px 24px 28px;
        }
        .btn-close-custom {
            background: none;
            border: none;
            font-size: 18px;
            color: var(--text-3);
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .2s ease;
        }
        .btn-close-custom:hover {
            background: var(--primary-50);
            color: var(--primary-700);
        }
        .btn-submit {
            margin-top: 8px;
            padding: .7rem;
            font-size: 15px;
        }
        .privacy-note {
            font-size: 12px;
            color: var(--text-3);
            text-align: center;
            margin-top: 14px;
        }
        .form-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-1);
        }

        /* Responsive */
        @media (max-width: 576px) {
            .banner-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .banner-actions .btn {
                width: 100%;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .navbar-brand {
                font-size: 18px;
            }
            .brand-mark {
                width: 34px;
                height: 34px;
                font-size: 14px;
            }
        }