/* roulang page: index */
:root {
            --primary-dark: #0b1120;
            --primary-deep: #111c2e;
            --primary-blue: #2563eb;
            --primary-blue-light: #3b82f6;
            --accent-gold: #f5b544;
            --accent-gold-light: #f8cd7d;
            --bg-light: #f6f8fb;
            --bg-white: #ffffff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-light: #e6ebf0;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 4px 16px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 10px 32px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.12);
            --shadow-gold: 0 8px 24px rgba(245, 181, 68, 0.25);
            --transition-fast: all 0.25s ease;
            --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-primary: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-primary);
            color: var(--text-main);
            background-color: var(--bg-light);
            line-height: 1.6;
            font-size: 16px;
            overflow-x: hidden;
        }

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

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

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

        .container {
            max-width: 1280px;
            padding-left: 24px;
            padding-right: 24px;
            margin-left: auto;
            margin-right: auto;
        }

        .text-accent {
            color: var(--accent-gold) !important;
        }

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

        .bg-deep {
            background-color: var(--primary-dark) !important;
        }

        .section {
            padding: 100px 0;
        }

        .section-sm {
            padding: 64px 0;
        }

        .section-head {
            margin-bottom: 56px;
        }

        .section-head .eyebrow {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--primary-blue);
            background: rgba(37, 99, 235, 0.08);
            padding: 6px 16px;
            border-radius: 100px;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: 38px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .section-head .section-desc {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 720px;
        }

        .btn {
            font-weight: 500;
            border-radius: 10px;
            padding: 12px 26px;
            font-size: 15px;
            transition: var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid transparent;
        }

        .btn-primary-custom {
            background-color: var(--primary-blue);
            color: #fff;
            border-color: var(--primary-blue);
        }

        .btn-primary-custom:hover {
            background-color: #1a4fc4;
            border-color: #1a4fc4;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
        }

        .btn-outline-light-custom {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.55);
        }

        .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn-gold {
            background: linear-gradient(135deg, var(--accent-gold) 0%, #e89a2d 100%);
            color: #1a1a1a;
            font-weight: 600;
            border: none;
        }

        .btn-gold:hover {
            color: #1a1a1a;
            transform: translateY(-2px);
            box-shadow: var(--shadow-gold);
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1080;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.03);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-icon {
            width: 46px;
            height: 46px;
            background: linear-gradient(135deg, var(--primary-blue) 0%, #7c3aed 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            box-shadow: 0 6px 18px rgba(37, 99, 235, 0.3);
            flex-shrink: 0;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-text .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
        }

        .brand-text .brand-sub {
            font-size: 11px;
            color: var(--text-muted);
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-top: 2px;
        }

        .brand-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .header-search {
            position: relative;
        }

        .header-search .form-control {
            width: 240px;
            height: 40px;
            border-radius: 100px;
            border: 1px solid var(--border-light);
            background: #f1f4f8;
            padding-left: 40px;
            font-size: 14px;
            transition: var(--transition-fast);
        }

        .header-search .form-control:focus {
            background: #fff;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .header-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: #94a3b8;
            font-size: 14px;
            pointer-events: none;
        }

        .nav-row {
            border-top: 1px solid var(--border-light);
            padding: 0;
        }

        .nav-row .navbar {
            padding: 0;
        }

        .nav-row .navbar-nav {
            flex-direction: row;
            gap: 4px;
        }

        .nav-row .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 12px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            border-bottom: 2px solid transparent;
            transition: var(--transition-fast);
            position: relative;
        }

        .nav-row .nav-link i {
            margin-right: 8px;
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition-fast);
        }

        .nav-row .nav-link:hover {
            color: var(--primary-blue);
        }

        .nav-row .nav-link:hover i {
            color: var(--primary-blue);
        }

        .nav-row .nav-link.active {
            color: var(--primary-blue);
            font-weight: 600;
            border-bottom-color: var(--primary-blue);
        }

        .nav-row .nav-link.active i {
            color: var(--primary-blue);
        }

        .nav-cta {
            margin-left: auto;
            padding: 8px 0;
        }

        .nav-cta .btn {
            padding: 9px 20px;
            font-size: 14px;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            background-image: linear-gradient(120deg, rgba(11, 17, 32, 0.88) 0%, rgba(15, 28, 46, 0.82) 45%, rgba(37, 99, 235, 0.45) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: #fff;
            padding: 80px 0;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            right: -180px;
            top: -180px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.3) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            left: -120px;
            bottom: -120px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(245, 181, 68, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 100px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(10px);
            letter-spacing: 0.5px;
        }

        .hero-badge i {
            color: var(--accent-gold);
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 700;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 20px;
            max-width: 800px;
        }

        .hero h1 .highlight {
            background: linear-gradient(90deg, var(--accent-gold) 0%, #ffd597 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 18px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin-bottom: 36px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 56px;
        }

        .hero-stats {
            display: flex;
            gap: 50px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 32px;
            max-width: 700px;
        }

        .hero-stat-item .stat-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--accent-gold);
        }

        .hero-stat-item .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Feature Cards ===== */
        .features-section {
            background: var(--bg-white);
            padding: 100px 0;
            position: relative;
        }

        .feature-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            height: 100%;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-blue) 0%, #7c3aed 100%);
            opacity: 0;
            transition: var(--transition-fast);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 58px;
            height: 58px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 24px;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary-blue);
        }

        .feature-card:nth-child(2) .feature-icon {
            background: rgba(245, 181, 68, 0.12);
            color: #d97706;
        }

        .feature-card:nth-child(3) .feature-icon {
            background: rgba(16, 185, 129, 0.12);
            color: #059669;
        }

        .feature-card:nth-child(4) .feature-icon {
            background: rgba(124, 58, 237, 0.12);
            color: #7c3aed;
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-main);
        }

        .feature-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ===== Stats Section ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-deep) 100%);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            right: -100px;
            top: -100px;
            width: 300px;
            height: 300px;
            background: rgba(37, 99, 235, 0.2);
            border-radius: 50%;
            filter: blur(40px);
        }

        .stats-section::after {
            content: '';
            position: absolute;
            left: -80px;
            bottom: -80px;
            width: 250px;
            height: 250px;
            background: rgba(245, 181, 68, 0.1);
            border-radius: 50%;
            filter: blur(40px);
        }

        .stats-section .container {
            position: relative;
            z-index: 2;
        }

        .stat-item {
            text-align: center;
            padding: 30px 20px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(8px);
            transition: var(--transition-fast);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(255, 255, 255, 0.15);
        }

        .stat-item .stat-num {
            font-size: 48px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-item .stat-num span {
            color: var(--accent-gold);
        }

        .stat-item .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Product Info Blocks ===== */
        .info-section {
            background: var(--bg-light);
            padding: 100px 0;
        }

        .info-block {
            display: flex;
            align-items: center;
            gap: 60px;
            margin-bottom: 80px;
        }

        .info-block:last-child {
            margin-bottom: 0;
        }

        .info-block.reverse {
            flex-direction: row-reverse;
        }

        .info-image {
            flex: 1;
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .info-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: var(--transition-smooth);
        }

        .info-image:hover img {
            transform: scale(1.03);
        }

        .info-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(11, 17, 32, 0.4) 100%);
            pointer-events: none;
        }

        .info-content {
            flex: 1;
        }

        .info-content .info-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--primary-blue);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .info-content h3 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 18px;
            color: var(--text-main);
        }

        .info-content p {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .info-features {
            list-style: none;
            padding: 0;
            margin: 0 0 30px;
        }

        .info-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 6px 0;
            font-size: 15px;
            color: var(--text-main);
        }

        .info-features li i {
            color: #059669;
            font-size: 14px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: rgba(5, 150, 105, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Content Cards ===== */
        .content-cards-section {
            background: var(--bg-white);
            padding: 100px 0;
        }

        .content-card {
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            transition: var(--transition-smooth);
            position: relative;
        }

        .content-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .content-card .card-image {
            position: relative;
            height: 220px;
            overflow: hidden;
        }

        .content-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-smooth);
        }

        .content-card:hover .card-image img {
            transform: scale(1.05);
        }

        .content-card .card-image .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 5;
            background: rgba(11, 17, 32, 0.75);
            color: var(--accent-gold);
            padding: 4px 12px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 500;
            backdrop-filter: blur(6px);
            letter-spacing: 0.5px;
        }

        .content-card .card-body-custom {
            padding: 28px;
        }

        .content-card .card-body-custom h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .content-card .card-body-custom h3 a {
            color: var(--text-main);
        }

        .content-card .card-body-custom h3 a:hover {
            color: var(--primary-blue);
        }

        .content-card .card-body-custom p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 20px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 18px;
            border-top: 1px solid var(--border-light);
        }

        .card-meta .card-category {
            font-size: 13px;
            color: var(--primary-blue);
            background: rgba(37, 99, 235, 0.06);
            padding: 4px 14px;
            border-radius: 100px;
            font-weight: 500;
        }

        .card-meta .card-date {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

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

        /* ===== Steps ===== */
        .steps-section {
            background: var(--primary-dark);
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }

        .steps-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 2px;
            height: 100%;
            background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.1), transparent);
        }

        .steps-section .section-head h2 {
            color: #fff;
        }

        .steps-section .section-head .section-desc {
            color: rgba(255, 255, 255, 0.65);
        }

        .steps-section .section-head .eyebrow {
            background: rgba(255, 255, 255, 0.1);
            color: var(--accent-gold);
        }

        .step-item {
            position: relative;
            text-align: center;
            padding: 40px 24px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            height: 100%;
            transition: var(--transition-fast);
        }

        .step-item:hover {
            background: rgba(255, 255, 255, 0.07);
            transform: translateY(-4px);
        }

        .step-num {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-gold) 0%, #e89a2d 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(245, 181, 68, 0.35);
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
        }

        .step-item p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-light);
            padding: 100px 0;
        }

        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-accordion .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md) !important;
            margin-bottom: 16px;
            overflow: hidden;
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            transition: var(--transition-fast);
        }

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

        .faq-accordion .accordion-button {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            background: var(--bg-white);
            box-shadow: none;
            border: none;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--bg-white);
            color: var(--primary-blue);
            box-shadow: none;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .faq-accordion .accordion-button::after {
            background-size: 16px;
            transition: var(--transition-fast);
        }

        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            position: relative;
            background-image: linear-gradient(120deg, rgba(11, 17, 32, 0.92) 0%, rgba(17, 28, 46, 0.85) 60%, rgba(37, 99, 235, 0.5) 100%), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            padding: 100px 0;
            color: #fff;
        }

        .cta-section .cta-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 20px;
        }

        .cta-section .cta-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 36px;
            max-width: 560px;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            padding: 60px 0 0;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-brand {
            margin-bottom: 30px;
        }

        .footer-brand .brand-name {
            color: #fff;
            font-size: 22px;
            font-weight: 700;
        }

        .footer-brand .brand-sub {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            margin-top: 6px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 18px;
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
        }

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

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-links a:hover {
            color: var(--accent-gold);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            margin-top: 48px;
        }

        .footer-bottom .copyright {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .section {
                padding: 80px 0;
            }

            .hero {
                min-height: auto;
                background-attachment: scroll;
                padding: 60px 0;
            }

            .hero h1 {
                font-size: 40px;
            }

            .info-block {
                flex-direction: column;
                gap: 30px;
            }

            .info-block.reverse {
                flex-direction: column;
            }

            .info-image img {
                height: 300px;
            }

            .brand-actions .header-search {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }

            .section-head h2 {
                font-size: 28px;
            }

            .brand-row {
                padding: 12px 0;
            }

            .brand-text .brand-name {
                font-size: 17px;
            }

            .brand-text .brand-sub {
                font-size: 10px;
            }

            .nav-row .navbar-nav {
                flex-wrap: nowrap;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 4px;
            }

            .nav-row .nav-link {
                flex-shrink: 0;
                padding: 10px 14px;
                font-size: 14px;
            }

            .nav-cta {
                display: none;
            }

            .hero {
                padding: 50px 0;
            }

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

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

            .hero-stats {
                gap: 24px;
            }

            .hero-stat-item .stat-num {
                font-size: 24px;
            }

            .stat-item .stat-num {
                font-size: 36px;
            }

            .info-content h3 {
                font-size: 24px;
            }

            .cta-section .cta-title {
                font-size: 28px;
            }

            .footer-bottom .copyright {
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .brand-actions .btn {
                display: none;
            }

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

            .hero h1 {
                font-size: 27px;
                letter-spacing: -0.5px;
            }

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

            .feature-card {
                padding: 28px 20px;
            }

            .info-image img {
                height: 220px;
            }

            .content-card .card-image {
                height: 180px;
            }

            .step-item {
                padding: 30px 16px;
            }

            .cta-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0b1524;
            --primary-light: #111e33;
            --primary-dark: #07101d;
            --secondary: #d4a853;
            --secondary-light: #e6c87a;
            --secondary-dark: #b8903a;
            --bg: #0e1826;
            --card-bg: rgba(18, 30, 48, 0.8);
            --text: #e8eef8;
            --text-muted: #8b9bb4;
            --border: rgba(212, 168, 83, 0.22);
            --border-light: rgba(255, 255, 255, 0.08);
            --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 26px 60px rgba(0, 0, 0, 0.45);
            --radius: 16px;
            --radius-sm: 10px;
            --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

        .container {
            max-width: 1240px;
        }

        .section-block {
            padding: 88px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 3px;
            text-transform: uppercase;
            color: var(--secondary);
            background: rgba(212, 168, 83, 0.1);
            border: 1px solid var(--border);
            padding: 6px 18px;
            border-radius: 40px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 36px;
            font-weight: 900;
            line-height: 1.3;
            color: #ffffff;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .btn-gold {
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
            color: #1a1a2e !important;
            font-weight: 700;
            border: none;
            border-radius: 40px;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(212, 168, 83, 0.3);
        }

        .btn-gold:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(212, 168, 83, 0.4);
            filter: brightness(1.08);
        }

        .btn-outline-light-custom {
            border: 1px solid var(--border-light);
            color: #e8eef8 !important;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 40px;
            font-weight: 600;
            transition: var(--transition);
        }

        .btn-outline-light-custom:hover {
            background: rgba(212, 168, 83, 0.1);
            border-color: var(--border);
            color: var(--secondary-light) !important;
            transform: translateY(-2px);
        }

        .btn:focus,
        .btn:active:focus,
        .form-control:focus {
            box-shadow: 0 0 0 3px rgba(212, 168, 83, 0.25);
            outline: none;
        }

        /* ===== Header ===== */
        .site-header {
            background: linear-gradient(180deg, rgba(7, 14, 24, 0.98), rgba(11, 21, 36, 0.94));
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }

        .site-header .container {
            padding-top: 18px;
            padding-bottom: 0;
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 14px;
            gap: 18px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-icon {
            width: 46px;
            height: 46px;
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
            color: #0b1524;
            font-size: 20px;
            font-weight: 900;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            box-shadow: 0 4px 14px rgba(212, 168, 83, 0.4);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-name {
            font-size: 22px;
            font-weight: 900;
            color: #fff;
            letter-spacing: 0.5px;
        }

        .brand-sub {
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 2px;
            text-transform: uppercase;
        }

        .brand-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .header-search {
            position: relative;
            width: 260px;
        }

        .header-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 13px;
            pointer-events: none;
        }

        .header-search .form-control {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: 40px;
            color: #fff;
            font-size: 14px;
            padding: 8px 16px 8px 38px;
            transition: var(--transition);
        }

        .header-search .form-control::placeholder {
            color: var(--text-muted);
        }

        .header-search .form-control:focus {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--border);
        }

        .nav-row {
            border-top: 1px solid var(--border-light);
        }

        .nav-row .navbar-nav {
            display: flex;
            flex-direction: row;
            gap: 4px;
            align-items: center;
        }

        .nav-row .nav-link {
            color: var(--text-muted);
            font-size: 15px;
            font-weight: 500;
            padding: 14px 22px;
            display: flex;
            align-items: center;
            gap: 8px;
            border-bottom: 2px solid transparent;
            margin-bottom: -1px;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-row .nav-link i {
            font-size: 14px;
            color: var(--border);
            transition: var(--transition);
        }

        .nav-row .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.03);
        }

        .nav-row .nav-link:hover i {
            color: var(--secondary);
        }

        .nav-row .nav-link.active {
            color: var(--secondary-light);
            font-weight: 700;
            border-bottom-color: var(--secondary);
        }

        .nav-row .nav-link.active i {
            color: var(--secondary);
        }

        .nav-row .nav-cta {
            margin-left: auto;
            display: flex;
            align-items: center;
        }

        .nav-row .navbar {
            padding: 0;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            min-height: 560px;
            display: flex;
            align-items: center;
            isolation: isolate;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(6, 12, 22, 0.92) 20%, rgba(11, 21, 36, 0.75) 60%, rgba(11, 21, 36, 0.55));
            z-index: -1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 140px;
            background: linear-gradient(to top, var(--bg), transparent);
            z-index: -1;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            padding: 90px 0 100px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            background: rgba(212, 168, 83, 0.12);
            border: 1px solid var(--border);
            color: var(--secondary-light);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            padding: 6px 18px;
            border-radius: 40px;
            margin-bottom: 24px;
        }

        .hero-title {
            font-size: 50px;
            font-weight: 900;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-subtitle {
            font-size: 18px;
            line-height: 1.8;
            color: rgba(232, 238, 248, 0.85);
            max-width: 620px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .hero-actions .btn {
            padding: 12px 32px;
            font-size: 15px;
            font-weight: 700;
        }

        /* ===== Stats ===== */
        .stats-section {
            background: var(--primary-light);
            border-bottom: 1px solid var(--border-light);
            padding: 42px 0;
        }

        .stat-item {
            text-align: center;
            padding: 20px 10px;
        }

        .stat-number {
            font-size: 42px;
            font-weight: 900;
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 6px;
        }

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

        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 32px 28px;
            height: 100%;
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--border);
            box-shadow: var(--shadow-hover);
            background: rgba(20, 33, 54, 0.92);
        }

        .feature-icon {
            width: 54px;
            height: 54px;
            background: rgba(212, 168, 83, 0.12);
            border: 1px solid var(--border);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--secondary-light);
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: var(--secondary);
            color: #0b1524;
            transform: scale(1.05) rotate(-3deg);
            box-shadow: 0 6px 16px rgba(212, 168, 83, 0.3);
        }

        .feature-title {
            font-size: 19px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .feature-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin: 0;
        }

        /* ===== Industry Cards ===== */
        .industry-section {
            background: linear-gradient(180deg, var(--bg) 0%, #0a1322 100%);
        }

        .industry-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            height: 100%;
            transition: var(--transition);
        }

        .industry-card:hover {
            transform: translateY(-8px);
            border-color: var(--border);
            box-shadow: var(--shadow-hover);
        }

        .industry-img-wrap {
            position: relative;
            overflow: hidden;
            height: 200px;
        }

        .industry-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .industry-card:hover .industry-img-wrap img {
            transform: scale(1.06);
        }

        .industry-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(7, 14, 24, 0.5), transparent 60%);
        }

        .industry-body {
            padding: 24px;
        }

        .industry-title {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .industry-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .industry-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--secondary-light);
            background: rgba(212, 168, 83, 0.08);
            border: 1px solid var(--border);
            border-radius: 30px;
            padding: 3px 12px;
        }

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

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
        }

        .step-item {
            text-align: center;
            padding: 36px 24px;
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            transition: var(--transition);
            position: relative;
        }

        .step-item:hover {
            transform: translateY(-5px);
            border-color: var(--border);
            box-shadow: var(--shadow-hover);
        }

        .step-num {
            font-size: 30px;
            font-weight: 900;
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 14px;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

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

        /* ===== Value Banner ===== */
        .value-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 84px 0;
            isolation: isolate;
        }

        .value-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(6, 12, 22, 0.88);
            z-index: -1;
        }

        .value-section::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to bottom, var(--bg), transparent);
            z-index: -1;
        }

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

        .value-item {
            text-align: center;
            padding: 30px 16px;
        }

        .value-number {
            font-size: 40px;
            font-weight: 900;
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .value-label {
            font-size: 15px;
            color: rgba(232, 238, 248, 0.85);
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
        }

        .faq-accordion {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-accordion .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border-light) !important;
            border-radius: var(--radius-sm) !important;
            margin-bottom: 14px;
            overflow: hidden;
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 18px 24px;
            border-bottom: 1px solid transparent;
            transition: var(--transition);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(212, 168, 83, 0.06);
            color: var(--secondary-light);
            border-bottom-color: var(--border-light);
            box-shadow: none;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(212, 168, 83, 0.2);
            border-color: transparent;
        }

        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23d4a853'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
        }

        .faq-accordion .accordion-body {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
            padding: 18px 24px 22px;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            text-align: center;
            isolation: isolate;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(6, 12, 22, 0.92), rgba(18, 28, 46, 0.88));
            z-index: -1;
        }

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

        .cta-title {
            font-size: 34px;
            font-weight: 900;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .cta-btn {
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
            color: #0b1524 !important;
            font-weight: 700;
            border-radius: 50px;
            padding: 13px 40px;
            border: none;
            transition: var(--transition);
            box-shadow: 0 8px 28px rgba(212, 168, 83, 0.3);
        }

        .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(212, 168, 83, 0.45);
            filter: brightness(1.06);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #060d18;
            padding: 68px 0 0;
            border-top: 1px solid var(--border-light);
        }

        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin: 0;
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
        }

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

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 14px;
            transition: var(--transition);
        }

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

        .footer-links li span,
        .footer-links li i {
            color: var(--text-muted);
            font-size: 14px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding: 22px 0;
            margin-top: 50px;
        }

        .footer-bottom .copyright,
        .footer-bottom .footer-meta {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
        }

        .footer-bottom .footer-meta a {
            color: var(--text-muted);
            margin-left: 18px;
        }

        .footer-bottom .footer-meta a:hover {
            color: var(--secondary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199.98px) {
            .hero-title {
                font-size: 44px;
            }

            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 991.98px) {
            .brand-row {
                flex-wrap: wrap;
            }

            .brand-actions {
                flex: 1;
                justify-content: flex-end;
            }

            .header-search {
                width: 200px;
            }

            .nav-row {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }

            .nav-row .navbar-nav {
                flex-wrap: nowrap;
                min-width: max-content;
            }

            .nav-row .nav-link {
                font-size: 14px;
                padding: 14px 16px;
            }

            .hero-section {
                min-height: 500px;
            }

            .hero-content {
                padding: 70px 0 80px;
            }

            .section-block {
                padding: 70px 0;
            }

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

        @media (max-width: 767.98px) {
            .brand-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .brand-actions {
                width: 100%;
                justify-content: space-between;
            }

            .header-search {
                width: 100%;
                max-width: 280px;
            }

            .hero-title {
                font-size: 34px;
            }

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

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

            .stat-number {
                font-size: 32px;
            }

            .process-steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .value-section {
                padding: 60px 0;
            }

            .cta-title {
                font-size: 27px;
            }

            .cta-btn {
                width: 100%;
                max-width: 320px;
            }

            .footer-bottom .footer-meta {
                text-align: left;
                margin-top: 8px;
            }

            .footer-bottom .footer-meta a {
                margin-left: 0;
                margin-right: 16px;
            }
        }

        @media (max-width: 520px) {
            .brand-name {
                font-size: 19px;
            }

            .brand-sub {
                font-size: 11px;
            }

            .brand-actions .btn {
                font-size: 12px;
                padding: 8px 14px;
            }

            .hero-title {
                font-size: 28px;
            }

            .hero-subtitle {
                font-size: 15px;
            }

            .hero-badge {
                font-size: 12px;
            }

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

            .section-subtitle {
                font-size: 14px;
            }

            .feature-card {
                padding: 24px 20px;
            }

            .feature-title {
                font-size: 17px;
            }

            .industry-card .industry-img-wrap {
                height: 170px;
            }

            .stat-number {
                font-size: 28px;
            }

            .value-number {
                font-size: 32px;
            }
        }

/* roulang page: article */
:root {
            --primary: #D4AF37;
            --primary-rgb: 212, 175, 55;
            --primary-dark: #B8962A;
            --body-bg: #0B1220;
            --surface: #101B30;
            --surface-2: #15233F;
            --surface-3: #1C2D4F;
            --text-light: #F5F7FA;
            --text-muted: #9BA7B9;
            --border: #263A5F;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
            --shadow-gold: 0 8px 24px rgba(212, 175, 55, 0.15);
            --gradient-gold: linear-gradient(135deg, #E8C86A 0%, #D4AF37 45%, #B38B2C 100%);
            --transition: all 0.3s cubic-bezier(.4, 0, .2, 1);
            --font-display: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-display);
            background: var(--body-bg);
            color: var(--text-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s;
        }

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

        .container {
            max-width: 1200px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: linear-gradient(180deg, #0D1526 0%, #0A111F 100%);
            border-bottom: 1px solid rgba(212, 175, 55, 0.2);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
        }

        .brand-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 0;
            gap: 24px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--gradient-gold);
            color: #0A111F;
            font-weight: 800;
            font-size: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-gold);
            flex-shrink: 0;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
        }

        .brand-name {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            line-height: 1.2;
        }

        .brand-sub {
            font-size: 11px;
            color: var(--text-muted);
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-top: 2px;
        }

        .brand-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .header-search {
            position: relative;
            width: 260px;
        }

        .header-search .search-icon {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }

        .header-search .form-control {
            background: #1A2A4A;
            border: 1px solid var(--border);
            border-radius: 50px;
            color: #fff;
            padding-left: 42px;
            padding-right: 18px;
            height: 42px;
            font-size: 14px;
            box-shadow: none;
            transition: var(--transition);
        }

        .header-search .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
            background: #1E3050;
            color: #fff;
        }

        .header-search .form-control::placeholder {
            color: #7B8798;
        }

        .btn-gold {
            background: var(--gradient-gold);
            color: #0A111F;
            font-weight: 700;
            border: none;
            border-radius: 50px;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(212, 175, 55, 0.25);
        }

        .btn-gold:hover,
        .btn-gold:focus {
            color: #0A111F;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(212, 175, 55, 0.35);
        }

        .btn-outline-light-custom {
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #E8EAED;
            border-radius: 50px;
            transition: var(--transition);
            background: transparent;
        }

        .btn-outline-light-custom:hover,
        .btn-outline-light-custom:focus {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(212, 175, 55, 0.08);
            box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1);
        }

        .nav-row {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 10px 0;
        }

        .nav-row .navbar {
            display: flex;
            align-items: center;
            gap: 16px;
            justify-content: space-between;
            padding: 0;
        }

        .nav-row .navbar-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            flex-wrap: wrap;
        }

        .nav-row .navbar-nav .nav-link {
            color: #B0B9CB;
            font-weight: 500;
            padding: 10px 20px;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            border: 1px solid transparent;
            font-size: 15px;
            background: transparent;
        }

        .nav-row .navbar-nav .nav-link i {
            font-size: 14px;
            color: var(--primary);
            opacity: 0.8;
        }

        .nav-row .navbar-nav .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
            border-color: rgba(255, 255, 255, 0.1);
        }

        .nav-row .navbar-nav .nav-link.active {
            color: var(--primary);
            background: rgba(212, 175, 55, 0.12);
            border-color: rgba(212, 175, 55, 0.35);
        }

        .nav-row .nav-cta {
            margin-left: auto;
            flex-shrink: 0;
        }

        .article-hero {
            position: relative;
            padding: 84px 0 76px;
            background: linear-gradient(160deg, #0D1526 0%, #131E38 60%, #1A2A4A 100%);
            overflow: hidden;
            border-bottom: 1px solid rgba(212, 175, 55, 0.18);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.22;
            z-index: 0;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 18, 32, 0.95) 0%, rgba(11, 18, 32, 0.82) 55%, rgba(11, 18, 32, 0.55) 100%);
            z-index: 1;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(212, 175, 55, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 1;
        }

        .article-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(212, 175, 55, 0.14);
            border: 1px solid rgba(212, 175, 55, 0.4);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 22px;
        }

        .hero-tag i {
            font-size: 13px;
        }

        .article-hero h1 {
            font-size: clamp(32px, 4.5vw, 54px);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 24px;
            color: #fff;
            letter-spacing: 0.5px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            color: var(--text-muted);
            font-size: 14px;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .article-meta i {
            color: var(--primary);
        }

        .hero-cover {
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transform: rotate(2deg);
            transition: var(--transition);
            max-height: 360px;
            object-fit: cover;
            width: 100%;
        }

        .hero-cover:hover {
            transform: rotate(0deg) scale(1.02);
        }

        .article-section {
            padding: 72px 0 56px;
            background: var(--body-bg);
        }

        .article-layout {
            max-width: 920px;
            margin: 0 auto;
        }

        .article-content-card {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.06);
            padding: 48px 52px;
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
        }

        .article-content-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-gold);
        }

        .article-content-card>*:first-child {
            margin-top: 0;
        }

        .article-content-card h1,
        .article-content-card h2,
        .article-content-card h3,
        .article-content-card h4,
        .article-content-card h5,
        .article-content-card h6 {
            color: #fff;
            font-weight: 700;
            line-height: 1.4;
            margin: 32px 0 16px;
        }

        .article-content-card h1 {
            font-size: 28px;
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }

        .article-content-card h2 {
            font-size: 24px;
            border-left: 4px solid var(--primary);
            padding-left: 14px;
        }

        .article-content-card h3 {
            font-size: 20px;
        }

        .article-content-card h4 {
            font-size: 18px;
        }

        .article-content-card p {
            color: #C7D0DE;
            font-size: 16px;
            margin-bottom: 18px;
            line-height: 1.85;
        }

        .article-content-card img {
            border-radius: 12px;
            margin: 24px 0;
            box-shadow: var(--shadow);
        }

        .article-content-card ul,
        .article-content-card ol {
            margin: 16px 0 20px;
            padding-left: 24px;
            color: #C7D0DE;
            line-height: 1.8;
        }

        .article-content-card li {
            margin-bottom: 8px;
        }

        .article-content-card blockquote {
            background: rgba(212, 175, 55, 0.06);
            border-left: 4px solid var(--primary);
            padding: 18px 24px;
            margin: 24px 0;
            border-radius: 0 12px 12px 0;
            color: #D8E0EA;
            font-style: italic;
        }

        .article-content-card code {
            background: rgba(255, 255, 255, 0.08);
            color: #E8C86A;
            padding: 3px 8px;
            border-radius: 6px;
            font-size: 14px;
        }

        .article-content-card pre {
            background: #0B1020;
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 18px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 20px 0;
        }

        .article-content-card pre code {
            background: none;
            padding: 0;
        }

        .article-content-card table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }

        .article-content-card th,
        .article-content-card td {
            border: 1px solid var(--border);
            padding: 12px 16px;
            color: #C7D0DE;
        }

        .article-content-card th {
            background: rgba(212, 175, 55, 0.08);
            color: #fff;
        }

        .article-content-card a:not(.btn) {
            color: var(--primary);
            border-bottom: 1px solid rgba(212, 175, 55, 0.3);
            transition: border-color 0.3s;
        }

        .article-content-card a:not(.btn):hover {
            border-bottom-color: var(--primary);
        }

        .article-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 32px;
            margin-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            flex-wrap: wrap;
        }

        .related-section {
            padding: 72px 0 40px;
            background: linear-gradient(180deg, var(--body-bg) 0%, #0C1526 100%);
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(212, 175, 55, 0.12);
            border: 1px solid rgba(212, 175, 55, 0.3);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }

        .section-header h3 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 0;
        }

        .related-card {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--surface);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            padding: 28px 32px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            height: 100%;
        }

        .related-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-gold);
            opacity: 0;
            transition: var(--transition);
        }

        .related-card:hover,
        .related-card:focus {
            transform: translateY(-4px);
            border-color: rgba(212, 175, 55, 0.4);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
        }

        .related-card:hover::before,
        .related-card:focus::before {
            opacity: 1;
        }

        .related-card .rel-icon {
            width: 56px;
            height: 56px;
            min-width: 56px;
            border-radius: 14px;
            background: rgba(212, 175, 55, 0.12);
            border: 1px solid rgba(212, 175, 55, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 22px;
        }

        .related-card h5 {
            color: #fff;
            font-weight: 600;
            margin-bottom: 6px;
            font-size: 18px;
        }

        .related-card p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 0;
        }

        .related-card .rel-arrow {
            margin-left: auto;
            color: var(--primary);
            opacity: 0;
            transform: translateX(-8px);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .related-card:hover .rel-arrow,
        .related-card:focus .rel-arrow {
            opacity: 1;
            transform: translateX(0);
        }

        .cta-section {
            padding: 40px 0 72px;
        }

        .cta-box {
            background: linear-gradient(135deg, #1B2A4A 0%, #101B30 60%);
            border: 1px solid rgba(212, 175, 55, 0.25);
            border-radius: 24px;
            padding: 52px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(212, 175, 55, 0.14) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-box h3 {
            color: #fff;
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            color: #C0C8D6;
            font-size: 15px;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .cta-box .btn {
            position: relative;
            z-index: 1;
        }

        .not-found-section {
            padding: 120px 0;
            text-align: center;
            min-height: 60vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            background: linear-gradient(160deg, #0D1526 0%, #101B30 100%);
        }

        .not-found-icon {
            font-size: 64px;
            color: var(--primary);
            margin-bottom: 20px;
            opacity: 0.8;
        }

        .not-found-title {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .not-found-text {
            color: var(--text-muted);
            margin-bottom: 32px;
            font-size: 16px;
        }

        .site-footer {
            background: linear-gradient(180deg, #0B1220 0%, #070D18 100%);
            border-top: 1px solid rgba(212, 175, 55, 0.15);
            padding-top: 64px;
            position: relative;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-gold);
            opacity: 0.5;
        }

        .footer-brand {
            margin-bottom: 16px;
        }

        .footer-desc {
            color: #7E899B;
            font-size: 14px;
            line-height: 1.8;
            margin-top: 16px;
            max-width: 340px;
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 22px;
            position: relative;
            padding-bottom: 12px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 36px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

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

        .footer-links li {
            margin-bottom: 12px;
            color: #8A93A6;
            font-size: 14px;
        }

        .footer-links a {
            color: #8A93A6;
            transition: var(--transition);
            font-size: 14px;
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 6px;
        }

        .footer-links li i {
            color: var(--primary);
            font-size: 13px;
            margin-right: 8px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 18px 0;
            margin-top: 48px;
            color: #6B7484;
            font-size: 13px;
        }

        .footer-bottom .copyright {
            color: #6B7484;
        }

        @media (max-width: 1200px) {
            .header-search {
                width: 220px;
            }
        }

        @media (max-width: 992px) {
            .article-hero {
                padding: 64px 0 56px;
            }

            .article-content-card {
                padding: 36px 28px;
            }

            .brand-actions .header-search {
                width: 200px;
            }

            .cta-box {
                padding: 40px 28px;
            }

            .cta-box h3 {
                font-size: 22px;
            }
        }

        @media (max-width: 768px) {
            .brand-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
            }

            .brand-actions {
                width: 100%;
                flex-wrap: wrap;
            }

            .brand-actions .header-search {
                flex: 1;
                min-width: 180px;
            }

            .nav-row .navbar {
                flex-wrap: wrap;
            }

            .nav-row .navbar-nav {
                margin-bottom: 8px;
                gap: 4px;
            }

            .nav-row .navbar-nav .nav-link {
                padding: 8px 14px;
                font-size: 14px;
            }

            .article-hero {
                padding: 48px 0 40px;
            }

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

            .article-content-card {
                padding: 28px 20px;
            }

            .article-meta {
                flex-direction: column;
                gap: 8px;
            }

            .related-section {
                padding: 48px 0 24px;
            }

            .related-card {
                padding: 22px 20px;
            }

            .cta-section {
                padding: 24px 0 48px;
            }

            .cta-box {
                padding: 36px 20px;
            }
        }

        @media (max-width: 520px) {
            .brand-row {
                padding: 14px 0;
            }

            .brand-icon {
                width: 40px;
                height: 40px;
                font-size: 18px;
                border-radius: 10px;
            }

            .brand-name {
                font-size: 18px;
            }

            .brand-sub {
                font-size: 9px;
                letter-spacing: 1px;
            }

            .brand-actions .header-search {
                min-width: 100%;
                width: 100%;
            }

            .header-search .form-control {
                height: 38px;
            }

            .nav-row .navbar-nav {
                gap: 2px;
            }

            .nav-row .navbar-nav .nav-link {
                padding: 7px 10px;
                font-size: 13px;
            }

            .article-hero {
                padding: 36px 0 32px;
            }

            .article-hero h1 {
                font-size: 24px;
            }

            .hero-tag {
                font-size: 12px;
                padding: 5px 14px;
                margin-bottom: 14px;
            }

            .article-section {
                padding: 40px 0 32px;
            }

            .article-content-card {
                padding: 24px 16px;
                border-radius: 12px;
            }

            .article-footer {
                flex-direction: column;
                align-items: stretch;
            }

            .article-footer .btn {
                width: 100%;
            }

            .section-header h3 {
                font-size: 22px;
            }

            .related-card .rel-icon {
                width: 44px;
                height: 44px;
                min-width: 44px;
                font-size: 18px;
            }

            .related-card h5 {
                font-size: 16px;
            }

            .related-card p {
                font-size: 13px;
            }

            .cta-box h3 {
                font-size: 20px;
            }

            .cta-box p {
                font-size: 14px;
            }

            .footer-bottom {
                text-align: center;
            }

            .footer-bottom .text-md-end {
                text-align: center !important;
                margin-top: 6px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #080c13;
            --bg-surface: #0f141d;
            --bg-card: #141b26;
            --bg-card-hover: #1a2230;
            --bg-elevated: #1c2433;
            --border-subtle: #1e2735;
            --border-medium: #2a3345;
            --border-accent: #3d4a5f;
            --text-primary: #e8ecf2;
            --text-secondary: #b0b9c6;
            --text-muted: #6b7585;
            --accent-gold: #c9a050;
            --accent-gold-light: #dab866;
            --accent-gold-dark: #a88430;
            --accent-amber: #e8943a;
            --accent-teal: #3aa8b8;
            --accent-blue: #4a8ec9;
            --accent-red: #c94a4a;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
            --shadow-gold: 0 0 24px rgba(201, 160, 80, 0.15);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-display: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

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

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

        button:focus-visible,
        input:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
        }

        ::selection {
            background-color: rgba(201, 160, 80, 0.35);
            color: #fff;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (min-width: 1400px) {
            .container {
                max-width: 1280px;
            }
        }

        /* ========== HEADER ========== */
        .site-header {
            background: var(--bg-surface);
            border-bottom: 1px solid var(--border-subtle);
            position: sticky;
            top: 0;
            z-index: 1040;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            background: rgba(15, 20, 29, 0.92);
        }
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-dark) 100%);
            color: #0a0e15;
            font-weight: 800;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            letter-spacing: 1px;
            box-shadow: var(--shadow-gold);
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        .brand-name {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-sub {
            font-size: 0.68rem;
            color: var(--text-muted);
            letter-spacing: 1px;
            text-transform: uppercase;
            white-space: nowrap;
        }
        .brand-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-search {
            position: relative;
            display: flex;
            align-items: center;
        }
        .header-search .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-muted);
            font-size: 0.85rem;
            pointer-events: none;
            z-index: 2;
        }
        .header-search .form-control {
            background: var(--bg-card);
            border: 1px solid var(--border-medium);
            color: var(--text-primary);
            padding: 8px 14px 8px 38px;
            border-radius: var(--radius-sm);
            font-size: 0.875rem;
            width: 200px;
            transition: all var(--transition-base);
        }
        .header-search .form-control:focus {
            border-color: var(--accent-gold);
            box-shadow: 0 0 0 3px rgba(201, 160, 80, 0.12);
            background: var(--bg-elevated);
        }
        .header-search .form-control::placeholder {
            color: var(--text-muted);
        }

        .btn-gold {
            background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-dark) 100%);
            color: #0a0e15;
            border: none;
            font-weight: 600;
            border-radius: var(--radius-sm);
            padding: 8px 20px;
            font-size: 0.875rem;
            transition: all var(--transition-base);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .btn-gold:hover {
            background: linear-gradient(135deg, var(--accent-gold-light) 0%, var(--accent-gold) 100%);
            color: #0a0e15;
            box-shadow: var(--shadow-gold);
            transform: translateY(-1px);
        }
        .btn-gold:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-outline-light-custom {
            border: 1px solid var(--border-accent);
            color: var(--text-secondary);
            background: transparent;
            border-radius: var(--radius-sm);
            padding: 7px 16px;
            font-size: 0.85rem;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .btn-outline-light-custom:hover {
            border-color: var(--accent-gold);
            color: var(--accent-gold-light);
            background: rgba(201, 160, 80, 0.06);
        }

        .nav-row {
            border-top: 1px solid var(--border-subtle);
            padding: 0;
        }
        .nav-row .navbar {
            padding: 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .navbar-nav {
            display: flex;
            flex-direction: row;
            gap: 4px;
            align-items: center;
        }
        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.9rem;
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            letter-spacing: 0.3px;
            white-space: nowrap;
            position: relative;
        }
        .navbar-nav .nav-link i {
            margin-right: 5px;
            font-size: 0.8rem;
            opacity: 0.7;
        }
        .navbar-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.03);
        }
        .navbar-nav .nav-link.active {
            color: var(--accent-gold);
            background: rgba(201, 160, 80, 0.08);
            font-weight: 600;
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--accent-gold);
            border-radius: 1px;
        }
        .navbar-toggler {
            border: 1px solid var(--border-medium);
            background: var(--bg-card);
            color: var(--text-secondary);
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
        }
        .navbar-toggler:hover {
            border-color: var(--accent-gold);
            color: var(--accent-gold-light);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(201, 160, 80, 0.15);
        }
        .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(176,185,198,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
        }
        .nav-cta {
            flex-shrink: 0;
        }

        @media (max-width: 991.98px) {
            .brand-row {
                padding: 10px 0;
                gap: 12px;
            }
            .brand-name {
                font-size: 1rem;
            }
            .brand-icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }
            .header-search .form-control {
                width: 140px;
                font-size: 0.8rem;
            }
            .navbar-nav {
                flex-direction: column;
                gap: 2px;
                padding: 8px 0;
            }
            .navbar-nav .nav-link {
                padding: 10px 14px;
                width: 100%;
            }
            .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar-nav .nav-link.active {
                border-left: 3px solid var(--accent-gold);
                border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            }
            .nav-cta {
                padding: 6px 0 10px 0;
            }
            .brand-actions {
                gap: 8px;
            }
            .btn-gold {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 575.98px) {
            .brand-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .brand-actions {
                width: 100%;
                flex-wrap: wrap;
            }
            .header-search {
                flex: 1;
                min-width: 0;
            }
            .header-search .form-control {
                width: 100%;
            }
            .brand-text .brand-sub {
                display: none;
            }
            .brand-name {
                font-size: 0.95rem;
            }
        }

        /* ========== HERO ========== */
        .page-hero {
            position: relative;
            background: var(--bg-surface);
            overflow: hidden;
            padding: 70px 0 60px;
            min-height: 420px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 55%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.35;
            mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.2) 60%, rgba(0, 0, 0, 0) 100%);
            -webkit-mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.2) 60%, rgba(0, 0, 0, 0) 100%);
            z-index: 0;
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--bg-deep) 0%, transparent 100%);
            z-index: 0;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero .hero-badge {
            display: inline-block;
            background: rgba(201, 160, 80, 0.12);
            border: 1px solid rgba(201, 160, 80, 0.3);
            color: var(--accent-gold-light);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            letter-spacing: 1px;
            margin-bottom: 18px;
            text-transform: uppercase;
        }
        .page-hero h1 {
            font-family: var(--font-display);
            font-weight: 800;
            font-size: 2.8rem;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            line-height: 1.25;
            max-width: 650px;
        }
        .page-hero h1 .highlight {
            color: var(--accent-gold);
            position: relative;
        }
        .page-hero .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 550px;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .page-hero .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }
        .page-hero .hero-stat {
            text-align: left;
        }
        .page-hero .hero-stat .stat-num {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-gold);
            line-height: 1;
            margin-bottom: 4px;
        }
        .page-hero .hero-stat .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            letter-spacing: 0.5px;
        }

        @media (max-width: 991.98px) {
            .page-hero {
                padding: 50px 0 45px;
                min-height: auto;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .page-hero::before {
                width: 80%;
                opacity: 0.2;
            }
        }
        @media (max-width: 767.98px) {
            .page-hero {
                padding: 40px 0 36px;
            }
            .page-hero h1 {
                font-size: 1.7rem;
            }
            .page-hero .hero-desc {
                font-size: 0.95rem;
            }
            .page-hero .hero-stats {
                gap: 20px;
            }
            .page-hero .hero-stat .stat-num {
                font-size: 1.5rem;
            }
            .page-hero::before {
                width: 100%;
                opacity: 0.15;
            }
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 64px 0;
        }
        .section-dark {
            background: var(--bg-surface);
        }
        .section-title-wrap {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-gold);
            margin-bottom: 10px;
        }
        .section-title {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 2rem;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        @media (max-width: 767.98px) {
            .section {
                padding: 42px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-title-wrap {
                margin-bottom: 32px;
            }
        }

        /* ========== FEATURE CARDS ========== */
        .feature-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 30px 26px 26px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-gold), var(--accent-amber), var(--accent-gold));
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .feature-card:hover {
            border-color: var(--border-accent);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card .card-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            font-size: 1.5rem;
            flex-shrink: 0;
        }
        .icon-gold {
            background: rgba(201, 160, 80, 0.15);
            color: var(--accent-gold);
        }
        .icon-teal {
            background: rgba(58, 168, 184, 0.15);
            color: var(--accent-teal);
        }
        .icon-blue {
            background: rgba(74, 142, 201, 0.15);
            color: var(--accent-blue);
        }
        .icon-amber {
            background: rgba(232, 148, 58, 0.15);
            color: var(--accent-amber);
        }
        .icon-red {
            background: rgba(201, 74, 74, 0.15);
            color: var(--accent-red);
        }
        .feature-card h3 {
            font-family: var(--font-display);
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.65;
            flex-grow: 1;
        }
        .feature-card .card-tags {
            margin-top: 14px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .feature-card .card-tag {
            font-size: 0.72rem;
            padding: 3px 10px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-muted);
            border: 1px solid var(--border-subtle);
            letter-spacing: 0.3px;
        }
        .feature-card .card-image {
            margin-top: 16px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
        }
        .feature-card .card-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 16/10;
            transition: transform var(--transition-slow);
        }
        .feature-card:hover .card-image img {
            transform: scale(1.03);
        }

        @media (max-width: 991.98px) {
            .feature-card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 575.98px) {
            .feature-card-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .feature-card {
                padding: 22px 18px 20px;
            }
        }

        /* ========== HIGHLIGHT SECTION ========== */
        .highlight-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .highlight-image-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-medium);
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .highlight-image-wrap img {
            width: 100%;
            height: auto;
            display: block;
        }
        .highlight-image-wrap .img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(8, 12, 19, 0.7) 100%);
            pointer-events: none;
        }
        .highlight-content h2 {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .highlight-content p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.75;
            margin-bottom: 18px;
        }
        .highlight-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .highlight-list li {
            padding: 10px 0 10px 28px;
            position: relative;
            color: var(--text-secondary);
            font-size: 0.95rem;
            border-bottom: 1px solid var(--border-subtle);
        }
        .highlight-list li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 16px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-gold);
            box-shadow: 0 0 8px rgba(201, 160, 80, 0.4);
        }
        .highlight-list li:last-child {
            border-bottom: none;
        }

        @media (max-width: 991.98px) {
            .highlight-block {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .highlight-content h2 {
                font-size: 1.5rem;
            }
        }

        /* ========== PROCESS STEPS ========== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .process-step {
            text-align: center;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 18px 22px;
            position: relative;
            transition: all var(--transition-base);
        }
        .process-step:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .process-step .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
            color: #0a0e15;
            font-weight: 800;
            font-size: 1.2rem;
            margin-bottom: 14px;
            box-shadow: var(--shadow-gold);
        }
        .process-step h4 {
            font-family: var(--font-display);
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.5;
        }
        .process-connector {
            display: none;
        }

        @media (max-width: 991.98px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }
        @media (max-width: 575.98px) {
            .process-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
        }

        /* ========== STATS ROW ========== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 16px;
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-md);
        }
        .stat-card .stat-icon {
            font-size: 1.8rem;
            color: var(--accent-gold);
            margin-bottom: 10px;
        }
        .stat-card .stat-value {
            font-family: var(--font-display);
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-card .stat-value span {
            color: var(--accent-gold);
        }
        .stat-card .stat-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        @media (max-width: 991.98px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }
        @media (max-width: 575.98px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card .stat-value {
                font-size: 1.8rem;
            }
        }

        /* ========== FAQ ========== */
        .faq-list .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md) !important;
            margin-bottom: 10px;
            overflow: hidden;
        }
        .faq-list .accordion-button {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 16px 20px;
            border: none;
            box-shadow: none;
            transition: all var(--transition-base);
            letter-spacing: 0.3px;
        }
        .faq-list .accordion-button::after {
            filter: invert(0.7);
        }
        .faq-list .accordion-button:not(.collapsed) {
            background: var(--bg-elevated);
            color: var(--accent-gold);
            box-shadow: none;
        }
        .faq-list .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(201, 160, 80, 0.12);
            border-color: var(--accent-gold);
        }
        .faq-list .accordion-body {
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            padding: 4px 20px 18px;
            border-top: 1px solid var(--border-subtle);
        }
        .faq-list .accordion-button:hover {
            background: var(--bg-card-hover);
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            padding: 56px 0;
            text-align: center;
        }
        .cta-section h2 {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 2rem;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .cta-section p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 550px;
            margin: 0 auto 24px;
            line-height: 1.6;
        }
        .cta-section .btn-cta-lg {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-dark) 100%);
            color: #0a0e15;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            letter-spacing: 0.5px;
            transition: all var(--transition-base);
            border: none;
            box-shadow: var(--shadow-gold);
        }
        .cta-section .btn-cta-lg:hover {
            background: linear-gradient(135deg, var(--accent-gold-light) 0%, var(--accent-gold) 100%);
            color: #0a0e15;
            transform: translateY(-2px);
            box-shadow: 0 0 36px rgba(201, 160, 80, 0.25);
        }
        .cta-section .btn-cta-lg:active {
            transform: translateY(0);
        }

        @media (max-width: 767.98px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.9rem;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            padding: 50px 0 28px;
            color: var(--text-secondary);
        }
        .footer-brand .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.65;
        }
        .footer-title {
            font-family: var(--font-display);
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links li a {
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer-links li a:hover {
            color: var(--accent-gold-light);
        }
        .footer-links li i {
            color: var(--text-muted);
        }
        .footer-bottom {
            margin-top: 36px;
            padding-top: 18px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-bottom .copyright {
            font-size: 0.8rem;
        }
        @media (max-width: 767.98px) {
            .site-footer {
                padding: 36px 0 20px;
            }
        }

        /* ========== UTILS ========== */
        .text-gold {
            color: var(--accent-gold) !important;
        }
        .text-muted-custom {
            color: var(--text-muted) !important;
        }