/* roulang page: index */
:root {
            --color-bg-dark: #0F1115;
            --color-bg-card-dark: #1A1D29;
            --color-bg-light: #F8F8FC;
            --color-bg-card-light: #FFFFFF;
            --color-primary: #7C4DFF;
            --color-primary-deep: #6C3CE1;
            --color-secondary: #3B1F7A;
            --color-accent: #F5A623;
            --color-cyan: #00D9FF;
            --color-text-dark: #E8E8EE;
            --color-text-light: #22242E;
            --color-text-muted: #8B8FA3;
            --color-danger: #F6455D;
            --color-border-light: #E5E7F0;
            --color-border-dark: rgba(124, 77, 255, 0.3);
            --radius-sm: 8px;
            --radius-card: 10px;
            --radius-md: 12px;
            --shadow-light: 0 4px 20px rgba(15, 17, 21, 0.06);
            --shadow-light-hover: 0 12px 32px rgba(15, 17, 21, 0.12);
            --shadow-dark: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-dark-hover: 0 12px 40px rgba(0, 0, 0, 0.5);
            --spacing-section: 80px;
            --spacing-inner: 56px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition-base: all 0.25s ease;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-light);
            background-color: var(--color-bg-light);
            overflow-x: hidden;
        }

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

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

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

        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        ::selection {
            background: var(--color-primary);
            color: #fff;
        }

        .container {
            max-width: 1200px;
        }

        .section-dark {
            background-color: var(--color-bg-dark);
            color: var(--color-text-dark);
            padding: var(--spacing-section) 0;
        }

        .section-light {
            background-color: var(--color-bg-light);
            color: var(--color-text-light);
            padding: var(--spacing-section) 0;
        }

        .section-dark .text-muted-custom,
        .section-light .text-muted-custom {
            color: var(--color-text-muted);
            font-size: 15px;
        }

        .section-dark h2,
        .section-light h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-dark h2::after,
        .section-light h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            margin-top: 10px;
            border-radius: 2px;
        }

        .section-dark h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-dark);
        }

        .section-light h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-light);
        }

        .section-dark p,
        .section-light p {
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 12px;
        }

        .section-dark .section-desc,
        .section-light .section-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }

        .section-dark .section-desc {
            color: #A0A3B5;
        }

        /* Navigation */
        .site-header {
            background-color: rgba(15, 17, 21, 0.95);
            border-bottom: 1px solid rgba(124, 77, 255, 0.2);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .site-header .navbar {
            padding: 0;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            letter-spacing: 0.5px;
        }

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

        .site-header .navbar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }

        .site-header .navbar-nav .nav-link {
            color: #B8B9C7;
            font-weight: 500;
            font-size: 15px;
            padding: 8px 16px;
            position: relative;
            transition: color 0.25s ease;
        }

        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link:focus {
            color: #fff;
        }

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

        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .site-header .btn-nav-cta {
            background: var(--color-accent);
            color: #1a1a1a;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            border: none;
            transition: var(--transition-base);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .site-header .btn-nav-cta:hover {
            background: #e0940e;
            color: #1a1a1a;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.35);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: transparent;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.4);
            outline: none;
        }

        .navbar-toggler .fa-bars {
            color: #fff;
            font-size: 20px;
        }

        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background: rgba(15, 17, 21, 0.98);
                padding: 20px 16px;
                border-radius: var(--radius-md);
                margin-top: 12px;
                border: 1px solid rgba(124, 77, 255, 0.25);
            }
            .site-header .navbar-nav .nav-link.active::after {
                display: none;
            }
            .site-header .navbar-nav .nav-link {
                padding: 12px 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .site-header .btn-nav-cta {
                margin-top: 12px;
                width: 100%;
                text-align: center;
            }
        }

        /* Hero */
        .hero-section {
            background: linear-gradient(135deg, #0F1115 0%, #1A1D29 50%, #0F1115 100%);
            min-height: 85vh;
            display: flex;
            align-items: center;
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(124, 77, 255, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .hero-creator-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
        }

        .hero-avatar {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            flex-shrink: 0;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

        .hero-creator-info {
            display: flex;
            flex-direction: column;
        }

        .hero-creator-name {
            font-weight: 600;
            font-size: 17px;
            color: #fff;
            letter-spacing: 0.3px;
        }

        .hero-creator-badge {
            font-size: 13px;
            color: var(--color-cyan);
            font-weight: 500;
            letter-spacing: 0.5px;
        }

        .hero-section h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }

        .hero-section h1 .highlight-primary {
            color: var(--color-primary);
        }

        .hero-section h1 .highlight-accent {
            color: var(--color-accent);
        }

        .hero-section .hero-subtitle {
            font-size: 17px;
            line-height: 1.85;
            color: #B8B9C7;
            max-width: 560px;
            margin-bottom: 28px;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .btn-primary-custom {
            background: var(--color-accent);
            color: #1a1a1a;
            font-weight: 600;
            font-size: 16px;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: none;
            transition: var(--transition-base);
            letter-spacing: 0.3px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary-custom:hover {
            background: #e0940e;
            color: #1a1a1a;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(245, 166, 35, 0.4);
        }

        .btn-primary-custom:active {
            transform: scale(0.98);
        }

        .btn-primary-custom:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        .btn-secondary-custom {
            background: transparent;
            color: #fff;
            font-weight: 500;
            font-size: 16px;
            padding: 14px 24px;
            border-radius: var(--radius-sm);
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            transition: var(--transition-base);
            letter-spacing: 0.3px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-secondary-custom:hover {
            background: rgba(124, 77, 255, 0.2);
            border-color: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-secondary-custom:active {
            transform: scale(0.98);
        }

        .btn-secondary-custom:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        .hero-visual-wrapper {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-visual-main {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(124, 77, 255, 0.3);
            position: relative;
            width: 100%;
            max-width: 520px;
        }

        .hero-visual-main img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        .hero-data-badges {
            position: absolute;
            bottom: -20px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .hero-data-badge {
            background: rgba(26, 29, 41, 0.92);
            border: 1px solid rgba(124, 77, 255, 0.4);
            border-radius: var(--radius-sm);
            padding: 12px 18px;
            text-align: center;
            min-width: 90px;
            backdrop-filter: blur(8px);
        }

        .hero-data-badge .badge-number {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-accent);
            display: block;
            line-height: 1.2;
        }

        .hero-data-badge .badge-label {
            font-size: 12px;
            color: #A0A3B5;
            display: block;
            margin-top: 4px;
            letter-spacing: 0.5px;
        }

        @media (max-width: 991.98px) {
            .hero-section {
                min-height: auto;
                padding: 56px 0;
            }
            .hero-section h1 {
                font-size: 30px;
            }
            .hero-visual-wrapper {
                min-height: auto;
                margin-top: 40px;
            }
            .hero-visual-main img {
                height: 240px;
            }
            .hero-data-badges {
                position: static;
                transform: none;
                margin-top: 24px;
            }
        }

        @media (max-width: 575.98px) {
            .hero-section {
                padding: 40px 0;
            }
            .hero-section h1 {
                font-size: 26px;
            }
            .hero-section .hero-subtitle {
                font-size: 15px;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary-custom,
            .btn-secondary-custom {
                text-align: center;
                justify-content: center;
            }
        }

        /* Cards */
        .card-custom {
            border-radius: var(--radius-card);
            transition: var(--transition-base);
            overflow: hidden;
            height: 100%;
        }

        .card-light {
            background: var(--color-bg-card-light);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-light);
        }

        .card-light:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-light-hover);
            transform: translateY(-4px);
        }

        .card-dark {
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            box-shadow: var(--shadow-dark);
            color: var(--color-text-dark);
        }

        .card-dark:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-dark-hover);
            transform: translateY(-4px);
        }

        .card-body-custom {
            padding: 24px 20px;
        }

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 14px;
        }

        .card-icon-primary {
            background: rgba(124, 77, 255, 0.15);
            color: var(--color-primary);
        }

        .card-icon-cyan {
            background: rgba(0, 217, 255, 0.15);
            color: var(--color-cyan);
        }

        .card-icon-accent {
            background: rgba(245, 166, 35, 0.2);
            color: var(--color-accent);
        }

        .card-dark .card-icon-primary {
            background: rgba(124, 77, 255, 0.25);
        }
        .card-dark .card-icon-cyan {
            background: rgba(0, 217, 255, 0.2);
        }
        .card-dark .card-icon-accent {
            background: rgba(245, 166, 35, 0.25);
        }

        .card-title {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
        }

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

        .card-dark .card-text {
            color: #A0A3B5;
        }

        /* Badge and tags */
        .badge-custom {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            padding: 5px 12px;
            border-radius: 20px;
            font-weight: 500;
            letter-spacing: 0.3px;
        }

        .badge-purple {
            background: rgba(124, 77, 255, 0.12);
            color: var(--color-primary);
            border: 1px solid rgba(124, 77, 255, 0.25);
        }

        .badge-accent {
            background: var(--color-accent);
            color: #1a1a1a;
            font-weight: 600;
        }

        .badge-cyan {
            background: rgba(0, 217, 255, 0.12);
            color: var(--color-cyan);
            border: 1px solid rgba(0, 217, 255, 0.25);
        }

        .tag-capsule {
            display: inline-block;
            font-size: 13px;
            padding: 4px 14px;
            border-radius: 6px;
            background: rgba(124, 77, 255, 0.1);
            color: var(--color-primary);
            font-weight: 500;
            letter-spacing: 0.3px;
            transition: var(--transition-base);
        }

        .tag-capsule:hover {
            background: rgba(124, 77, 255, 0.2);
            color: var(--color-primary-deep);
        }

        /* Buttons general */
        .btn-outline-primary-custom {
            background: transparent;
            color: var(--color-primary);
            font-weight: 500;
            font-size: 14px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            border: 1.5px solid var(--color-primary);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-outline-primary-custom:hover {
            background: rgba(124, 77, 255, 0.12);
            color: var(--color-primary);
            border-color: var(--color-primary);
            transform: translateY(-2px);
        }

        .btn-outline-cyan {
            background: transparent;
            color: var(--color-cyan);
            font-weight: 500;
            font-size: 14px;
            padding: 6px 14px;
            border-radius: 6px;
            border: 1.5px solid var(--color-cyan);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .btn-outline-cyan:hover {
            background: rgba(0, 217, 255, 0.12);
            color: var(--color-cyan);
            border-color: var(--color-cyan);
            transform: translateY(-2px);
        }

        /* Steps */
        .step-item {
            position: relative;
            padding: 24px 16px;
            text-align: center;
        }

        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

        .step-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .step-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        .step-arrow {
            position: absolute;
            top: 44px;
            right: -16px;
            color: var(--color-primary);
            font-size: 20px;
            opacity: 0.6;
        }

        @media (max-width: 767.98px) {
            .step-arrow {
                display: none;
            }
        }

        /* Data metrics */
        .data-metric-card {
            text-align: center;
            padding: 20px;
            border-radius: var(--radius-card);
            background: rgba(26, 29, 41, 0.8);
            border: 1px solid rgba(124, 77, 255, 0.3);
            transition: var(--transition-base);
        }

        .data-metric-card:hover {
            border-color: var(--color-primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-dark-hover);
        }

        .data-metric-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.1;
            letter-spacing: -1px;
        }

        .data-metric-number .metric-unit {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text-dark);
            margin-left: 2px;
        }

        .data-metric-label {
            font-size: 14px;
            color: #A0A3B5;
            margin-top: 8px;
            letter-spacing: 0.5px;
        }

        .data-metric-trend {
            font-size: 13px;
            color: var(--color-cyan);
            margin-top: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 4px;
        }

        /* Testimonial */
        .testimonial-card {
            padding: 28px 24px;
            position: relative;
        }

        .testimonial-card .quote-mark {
            font-size: 48px;
            color: rgba(124, 77, 255, 0.25);
            font-weight: 700;
            line-height: 1;
            margin-bottom: 12px;
            font-family: Georgia, serif;
        }

        .testimonial-text {
            font-size: 15px;
            line-height: 1.8;
            color: var(--color-text-light);
            margin-bottom: 18px;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            flex-shrink: 0;
        }

        .testimonial-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-light);
        }

        .testimonial-role {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        /* News section */
        .news-main-card {
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .news-main-card .news-image {
            border-radius: var(--radius-card) var(--radius-card) 0 0;
            overflow: hidden;
            height: 280px;
        }

        .news-main-card .news-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .news-date {
            font-size: 13px;
            color: var(--color-text-muted);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .news-item-compact {
            display: flex;
            gap: 16px;
            padding: 14px 0;
            border-bottom: 1px solid var(--color-border-light);
            align-items: flex-start;
            transition: var(--transition-base);
        }

        .news-item-compact:hover {
            border-bottom-color: var(--color-primary);
        }

        .news-item-compact .news-date-side {
            min-width: 70px;
            font-size: 13px;
            color: var(--color-text-muted);
            padding-top: 2px;
        }

        .news-item-compact .news-content {
            flex: 1;
        }

        .news-item-compact .news-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-light);
            margin-bottom: 4px;
            line-height: 1.5;
        }

        .news-item-compact .news-summary {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin-bottom: 6px;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid rgba(124, 77, 255, 0.2);
            margin-bottom: 0;
        }

        .faq-question {
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            padding: 18px 12px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: var(--transition-base);
            gap: 16px;
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-question .faq-icon {
            font-size: 16px;
            color: var(--color-primary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-question[aria-expanded="true"] .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 12px 18px;
            font-size: 15px;
            line-height: 1.75;
            color: #A0A3B5;
        }

        /* Feature list */
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 0;
            border-bottom: 1px solid var(--color-border-light);
        }

        .feature-list li:last-child {
            border-bottom: none;
        }

        .feature-list .feature-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: rgba(124, 77, 255, 0.12);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .feature-list .feature-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-light);
            margin-bottom: 2px;
        }

        .feature-list .feature-desc {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* Subscribe form */
        .subscribe-form .form-control {
            border-radius: var(--radius-sm);
            border: 1px solid #D8DAE6;
            padding: 14px 18px;
            font-size: 15px;
            color: var(--color-text-light);
            background: #fff;
            transition: var(--transition-base);
        }

        .subscribe-form .form-control:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.3);
            outline: none;
        }

        .subscribe-form .btn-submit {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: none;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .subscribe-form .btn-submit:hover {
            background: var(--color-primary-deep);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(124, 77, 255, 0.4);
        }

        .subscribe-form .btn-submit:active {
            transform: scale(0.98);
        }

        /* Footer */
        .site-footer {
            background-color: #0F1115;
            color: #A0A3B5;
            padding: 56px 0 24px;
            border-top: 1px solid rgba(124, 77, 255, 0.2);
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand .brand-icon {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #8B8FA3;
            max-width: 320px;
            margin-bottom: 16px;
        }

        .site-footer .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

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

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

        .site-footer ul li a {
            color: #8B8FA3;
            font-size: 14px;
            transition: var(--transition-base);
        }

        .site-footer ul li a:hover {
            color: var(--color-primary);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            margin-top: 40px;
            text-align: center;
            font-size: 13px;
            color: #6B6E80;
        }

        .site-footer .footer-bottom a {
            color: #8B8FA3;
            font-size: 13px;
            transition: var(--transition-base);
        }

        .site-footer .footer-bottom a:hover {
            color: var(--color-primary);
        }

        /* Misc */
        .img-cover-wrapper {
            border-radius: var(--radius-card);
            overflow: hidden;
            background: #EAEBF2;
            position: relative;
        }

        .img-cover-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .img-cover-wrapper:hover img {
            transform: scale(1.04);
        }

        .bg-image-cover {
            position: relative;
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-card);
            overflow: hidden;
        }

        .bg-image-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 17, 21, 0.3) 0%, rgba(15, 17, 21, 0.7) 100%);
        }

        .bg-image-cover .content-overlay {
            position: relative;
            z-index: 2;
        }

        .divider-custom {
            height: 1px;
            background: linear-gradient(to right, transparent, var(--color-primary), transparent);
            margin: 0;
            opacity: 0.4;
        }

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

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

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

        /* Section spacing on mobile */
        @media (max-width: 767.98px) {
            :root {
                --spacing-section: 56px;
                --spacing-inner: 36px;
            }
            .section-dark h2,
            .section-light h2 {
                font-size: 24px;
            }
            .hero-section h1 {
                font-size: 28px;
            }
            .data-metric-number {
                font-size: 32px;
            }
            .news-main-card .news-image {
                height: 200px;
            }
            .card-body-custom {
                padding: 18px 16px;
            }
            .testimonial-card {
                padding: 20px 18px;
            }
        }

        @media (max-width: 575.98px) {
            .section-dark h2,
            .section-light h2 {
                font-size: 22px;
            }
            .hero-section h1 {
                font-size: 24px;
            }
            .site-footer {
                text-align: center;
            }
            .site-footer .footer-desc {
                max-width: 100%;
            }
            .site-footer .footer-brand {
                justify-content: center;
            }
        }

/* roulang page: category2 */
:root {
            --color-bg-dark: #0F1115;
            --color-bg-card-dark: #1A1D29;
            --color-bg-light: #F8F8FC;
            --color-bg-card-light: #FFFFFF;
            --color-primary: #7C4DFF;
            --color-primary-deep: #6C3CE1;
            --color-secondary: #3B1F7A;
            --color-accent: #F5A623;
            --color-cyan: #00D9FF;
            --color-text-dark: #E8E8EE;
            --color-text-light: #22242E;
            --color-text-muted: #8B8FA3;
            --color-danger: #F6455D;
            --color-border-light: #E5E7F0;
            --color-border-dark: rgba(124, 77, 255, 0.3);
            --radius-sm: 8px;
            --radius-card: 10px;
            --radius-md: 12px;
            --shadow-light: 0 4px 20px rgba(15, 17, 21, 0.06);
            --shadow-light-hover: 0 12px 32px rgba(15, 17, 21, 0.12);
            --shadow-dark: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-dark-hover: 0 12px 40px rgba(0, 0, 0, 0.5);
            --spacing-section: 56px;
            --spacing-inner: 36px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-light);
            background-color: var(--color-bg-light);
            overflow-x: hidden;
        }

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

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

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

        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
        }

        .section-dark {
            background-color: var(--color-bg-dark);
            color: var(--color-text-dark);
            padding: var(--spacing-section) 0;
        }

        .section-light {
            background-color: var(--color-bg-light);
            color: var(--color-text-light);
            padding: var(--spacing-section) 0;
        }

        .section-dark .text-muted-custom,
        .section-light .text-muted-custom {
            color: var(--color-text-muted);
            font-size: 15px;
        }

        .section-dark h2,
        .section-light h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-dark h2::after,
        .section-light h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            margin-top: 10px;
            border-radius: 2px;
        }

        .section-dark h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-dark);
        }

        .section-light h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-light);
        }

        .section-dark p,
        .section-light p {
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 12px;
        }

        .section-dark .section-desc,
        .section-light .section-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }

        .section-dark .section-desc {
            color: #A0A3B5;
        }

        /* Navigation */
        .site-header {
            background-color: rgba(15, 17, 21, 0.95);
            border-bottom: 1px solid rgba(124, 77, 255, 0.2);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .site-header .navbar {
            padding: 0;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            letter-spacing: 0.5px;
        }

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

        .site-header .navbar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }

        .site-header .navbar-nav .nav-link {
            color: #B8B9C7;
            font-weight: 500;
            font-size: 15px;
            padding: 8px 16px;
            position: relative;
            transition: color 0.25s ease;
        }

        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link:focus {
            color: #fff;
        }

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

        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .site-header .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 22px;
            padding: 4px 8px;
        }

        .site-header .navbar-toggler:focus {
            box-shadow: none;
            outline: 3px solid var(--color-cyan);
        }

        .btn-nav-cta {
            background: var(--color-accent);
            color: #1A1D29;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            transition: var(--transition-base);
            white-space: nowrap;
            border: none;
        }

        .btn-nav-cta:hover {
            background: #E5940A;
            color: #1A1D29;
            transform: translateY(-2px);
            box-shadow: 0 8px 18px rgba(245, 166, 35, 0.25);
        }

        /* Buttons */
        .btn-primary-brand {
            background: var(--color-primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 24px;
            font-weight: 600;
            transition: var(--transition-base);
            display: inline-block;
        }

        .btn-primary-brand:hover {
            background: var(--color-primary-deep);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 18px rgba(124, 77, 255, 0.3);
        }

        .btn-accent {
            background: var(--color-accent);
            color: #1A1D29;
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 24px;
            font-weight: 600;
            transition: var(--transition-base);
            display: inline-block;
        }

        .btn-accent:hover {
            background: #E5940A;
            color: #1A1D29;
            transform: translateY(-2px);
            box-shadow: 0 8px 18px rgba(245, 166, 35, 0.3);
        }

        .btn-outline-brand {
            background: transparent;
            border: 1.5px solid var(--color-primary);
            color: var(--color-primary);
            border-radius: var(--radius-sm);
            padding: 10px 20px;
            font-weight: 600;
            transition: var(--transition-base);
            display: inline-block;
        }

        .btn-outline-brand:hover {
            background: rgba(124, 77, 255, 0.12);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }

        .btn-outline-light {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            border-radius: var(--radius-sm);
            padding: 10px 20px;
            font-weight: 600;
            transition: var(--transition-base);
            display: inline-block;
        }

        .btn-outline-light:hover {
            background: rgba(124, 77, 255, 0.2);
            color: #fff;
            border-color: var(--color-primary);
        }

        .btn-read-more {
            border: 1px solid var(--color-cyan);
            color: var(--color-cyan);
            background: transparent;
            border-radius: var(--radius-sm);
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition-base);
            display: inline-block;
        }

        .btn-read-more:hover {
            background: rgba(0, 217, 255, 0.12);
            color: var(--color-cyan);
        }

        /* Hero / Banner */
        .category-hero {
            background: linear-gradient(135deg, #0F1115 0%, #1A1D29 55%, #2A1F5E 100%);
            padding: 56px 0 48px;
            min-height: 40vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(124, 77, 255, 0.2);
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(124, 77, 255, 0.18), transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.1), transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

        .breadcrumb-custom {
            background: transparent;
            margin-bottom: 20px;
            padding: 0;
            font-size: 14px;
            color: #A0A3B5;
            position: relative;
            z-index: 2;
        }

        .breadcrumb-custom a {
            color: #A0A3B5;
        }

        .breadcrumb-custom a:hover {
            color: var(--color-cyan);
        }

        .breadcrumb-custom .breadcrumb-item+.breadcrumb-item::before {
            content: '>';
            color: #6B6F82;
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
        }

        .category-hero .hero-sub {
            font-size: 17px;
            color: #B8B9C7;
            max-width: 640px;
            line-height: 1.8;
            position: relative;
            z-index: 2;
        }

        /* Cards */
        .card-guide {
            background: var(--color-bg-card-light);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-light);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .card-guide:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-light-hover);
            transform: translateY(-4px);
        }

        .card-guide .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #EAEBF2;
        }

        .card-guide .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .card-guide:hover .card-img-wrap img {
            transform: scale(1.05);
        }

        .card-guide .card-body {
            padding: 18px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .card-guide .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-light);
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .card-guide .card-text {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin-bottom: 14px;
            flex-grow: 1;
        }

        .card-guide .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: auto;
        }

        .badge-guide {
            background: rgba(124, 77, 255, 0.1);
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            display: inline-block;
        }

        .badge-accent {
            background: var(--color-accent);
            color: #1A1D29;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 4px;
            display: inline-block;
        }

        /* Feature cards */
        .feature-card {
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card);
            padding: 28px;
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .feature-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-dark-hover);
            transform: translateY(-4px);
        }

        .feature-card .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 22px;
            margin-bottom: 16px;
        }

        .feature-card h3 {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .feature-card p {
            color: #A0A3B5;
            font-size: 15px;
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* Data stats */
        .stat-card {
            text-align: center;
            padding: 24px 16px;
            background: rgba(26, 29, 41, 0.7);
            border: 1px solid rgba(124, 77, 255, 0.25);
            border-radius: var(--radius-card);
            transition: var(--transition-base);
        }

        .stat-card:hover {
            border-color: var(--color-primary);
            background: rgba(26, 29, 41, 0.95);
        }

        .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 15px;
            color: #A0A3B5;
            font-weight: 500;
        }

        /* Tag wall */
        .tag-wall {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-item {
            background: rgba(124, 77, 255, 0.1);
            color: var(--color-primary);
            border: 1px solid rgba(124, 77, 255, 0.3);
            border-radius: 20px;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition-base);
            display: inline-block;
        }

        .tag-item:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            transform: translateY(-2px);
        }

        /* FAQ */
        .faq-item {
            background: rgba(26, 29, 41, 0.8);
            border: 1px solid rgba(124, 77, 255, 0.25);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--color-primary);
        }

        .faq-question {
            padding: 18px 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 16px;
            color: #fff;
            transition: var(--transition-base);
            user-select: none;
        }

        .faq-question:hover {
            color: var(--color-cyan);
        }

        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--color-primary);
            font-size: 14px;
        }

        .faq-item.open .faq-question i {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
            color: #A0A3B5;
            font-size: 15px;
            line-height: 1.75;
        }

        .faq-item.open .faq-answer {
            max-height: 200px;
            padding: 0 20px 18px;
        }

        /* CTA Section */
        .cta-box {
            background: linear-gradient(135deg, #1A1D29 0%, #2A1F5E 100%);
            border: 1px solid rgba(124, 77, 255, 0.3);
            border-radius: var(--radius-md);
            padding: 48px 36px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(124, 77, 255, 0.2), transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-box h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 14px;
            position: relative;
            z-index: 2;
        }

        .cta-box p {
            color: #B8B9C7;
            font-size: 16px;
            line-height: 1.8;
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 2;
        }

        .cta-box .btn-group-cta {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-bg-dark);
            color: #A0A3B5;
            padding: 56px 0 24px;
            border-top: 1px solid rgba(124, 77, 255, 0.2);
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            margin-bottom: 14px;
        }

        .site-footer .footer-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #8B8FA3;
            max-width: 300px;
        }

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

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

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

        .site-footer ul li a {
            color: #8B8FA3;
            font-size: 14px;
            transition: var(--transition-base);
        }

        .site-footer ul li a:hover {
            color: var(--color-primary);
            padding-left: 4px;
        }

        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 13px;
            color: #6B6F82;
        }

        .site-footer .footer-bottom a {
            color: #8B8FA3;
        }

        .site-footer .footer-bottom a:hover {
            color: var(--color-primary);
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            .site-header .navbar-nav .nav-link {
                padding: 8px 10px;
                font-size: 14px;
            }

            .site-header .navbar-nav .nav-link.active::after {
                left: 10px;
                right: 10px;
            }

            .btn-nav-cta {
                font-size: 13px;
                padding: 8px 16px;
            }

            .category-hero h1 {
                font-size: 30px;
            }

            .stat-number {
                font-size: 36px;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --spacing-section: 40px;
                --spacing-inner: 24px;
            }

            .category-hero {
                padding: 40px 0 36px;
                min-height: auto;
            }

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

            .category-hero .hero-sub {
                font-size: 15px;
            }

            .section-dark h2,
            .section-light h2 {
                font-size: 24px;
            }

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

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

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

            .site-header .navbar-collapse {
                background: rgba(15, 17, 21, 0.98);
                border-radius: 0 0 10px 10px;
                padding: 16px;
                margin-top: 12px;
                border: 1px solid rgba(124, 77, 255, 0.25);
            }

            .site-header .navbar-nav .nav-link {
                padding: 10px 12px;
                font-size: 15px;
            }

            .site-header .navbar-nav .nav-link.active::after {
                display: none;
            }

            .btn-nav-cta {
                margin-top: 10px;
                text-align: center;
                display: block;
            }
        }

        @media (max-width: 575.98px) {
            .category-hero h1 {
                font-size: 22px;
            }

            .category-hero .hero-sub {
                font-size: 14px;
            }

            .section-dark h2,
            .section-light h2 {
                font-size: 22px;
            }

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

            .card-guide .card-title {
                font-size: 16px;
            }
        }

/* roulang page: category1 */
:root {
            --color-bg-dark: #0F1115;
            --color-bg-card-dark: #1A1D29;
            --color-bg-light: #F8F8FC;
            --color-bg-card-light: #FFFFFF;
            --color-primary: #7C4DFF;
            --color-primary-deep: #6C3CE1;
            --color-secondary: #3B1F7A;
            --color-accent: #F5A623;
            --color-cyan: #00D9FF;
            --color-text-dark: #E8E8EE;
            --color-text-light: #22242E;
            --color-text-muted: #8B8FA3;
            --color-danger: #F6455D;
            --color-border-light: #E5E7F0;
            --color-border-dark: rgba(124, 77, 255, 0.3);
            --radius-sm: 8px;
            --radius-card: 10px;
            --radius-md: 12px;
            --shadow-light: 0 4px 20px rgba(15, 17, 21, 0.06);
            --shadow-light-hover: 0 12px 32px rgba(15, 17, 21, 0.12);
            --shadow-dark: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-dark-hover: 0 12px 40px rgba(0, 0, 0, 0.5);
            --spacing-section: 72px;
            --spacing-inner: 48px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-light);
            background-color: var(--color-bg-light);
            overflow-x: hidden;
        }

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

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

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

        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
        }

        .section-dark {
            background-color: var(--color-bg-dark);
            color: var(--color-text-dark);
            padding: var(--spacing-section) 0;
        }

        .section-light {
            background-color: var(--color-bg-light);
            color: var(--color-text-light);
            padding: var(--spacing-section) 0;
        }

        .section-dark .text-muted-custom,
        .section-light .text-muted-custom {
            color: var(--color-text-muted);
            font-size: 15px;
        }

        .section-dark h2,
        .section-light h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-dark h2::after,
        .section-light h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            margin-top: 10px;
            border-radius: 2px;
        }

        .section-dark h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-dark);
        }

        .section-light h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-light);
        }

        .section-dark p,
        .section-light p {
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 12px;
        }

        .section-dark .section-desc,
        .section-light .section-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }

        .section-dark .section-desc {
            color: #A0A3B5;
        }

        /* Navigation */
        .site-header {
            background-color: rgba(15, 17, 21, 0.95);
            border-bottom: 1px solid rgba(124, 77, 255, 0.2);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .site-header .navbar {
            padding: 0;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            letter-spacing: 0.5px;
        }

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

        .site-header .navbar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }

        .site-header .navbar-nav .nav-link {
            color: #B8B9C7;
            font-weight: 500;
            font-size: 15px;
            padding: 8px 16px;
            position: relative;
            transition: color 0.25s ease;
        }

        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link:focus {
            color: #fff;
        }

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

        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: -2px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .btn-nav-cta {
            background-color: var(--color-accent);
            color: #1A1D29;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: 8px;
            border: none;
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .btn-nav-cta:hover {
            background-color: #FFC145;
            color: #1A1D29;
            transform: translateY(-2px);
        }

        .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 22px;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        /* Buttons */
        .btn-primary-custom {
            background-color: var(--color-accent);
            color: #1A1D29;
            border: none;
            border-radius: 8px;
            padding: 12px 24px;
            font-weight: 600;
            transition: var(--transition-base);
        }

        .btn-primary-custom:hover {
            background-color: #FFC145;
            color: #1A1D29;
            transform: translateY(-2px);
        }

        .btn-secondary-custom {
            background-color: transparent;
            border: 1.5px solid var(--color-primary);
            color: var(--color-primary);
            border-radius: 8px;
            padding: 10px 20px;
            font-weight: 600;
            transition: var(--transition-base);
        }

        .btn-secondary-custom:hover {
            background-color: rgba(124, 77, 255, 0.12);
            color: var(--color-primary-deep);
            border-color: var(--color-primary-deep);
        }

        .btn-outline-light-custom {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            border-radius: 8px;
            padding: 10px 20px;
            font-weight: 500;
            transition: var(--transition-base);
        }

        .btn-outline-light-custom:hover {
            background: rgba(124, 77, 255, 0.2);
            color: #fff;
            border-color: var(--color-primary);
        }

        .btn-sm-custom {
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 6px;
            border: 1.5px solid var(--color-cyan);
            color: var(--color-cyan);
            background: transparent;
            font-weight: 500;
            transition: var(--transition-base);
        }

        .btn-sm-custom:hover {
            background: rgba(0, 217, 255, 0.12);
            color: var(--color-cyan);
            border-color: var(--color-cyan);
        }

        /* Cards */
        .card-custom {
            background: var(--color-bg-card-light);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-light);
            transition: var(--transition-base);
            height: 100%;
        }

        .card-custom:hover {
            box-shadow: var(--shadow-light-hover);
            border-color: var(--color-primary);
            transform: translateY(-4px);
        }

        .card-dark-custom {
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
            height: 100%;
        }

        .card-dark-custom:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-dark-hover);
            transform: translateY(-4px);
        }

        /* Hero banner for category page */
        .category-banner {
            background-color: var(--color-bg-dark);
            background-image: linear-gradient(135deg, rgba(15,17,21,0.92) 0%, rgba(59,31,122,0.65) 100%), url('/assets/images/22f914bdc905364e.jpg');
            background-size: cover;
            background-position: center;
            min-height: 40vh;
            display: flex;
            align-items: flex-end;
            padding: 48px 0;
            color: #fff;
            position: relative;
        }

        .category-banner .breadcrumb {
            margin-bottom: 20px;
            --bs-breadcrumb-divider-color: rgba(255,255,255,0.6);
            --bs-breadcrumb-item-active-color: #fff;
        }

        .category-banner .breadcrumb a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
        }

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

        .category-banner h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 8px;
        }

        .category-banner .banner-caption {
            font-size: 16px;
            color: rgba(255,255,255,0.8);
            max-width: 680px;
            margin-bottom: 0;
        }

        /* Breadcrumb custom */
        .breadcrumb-custom {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            font-size: 14px;
            gap: 8px;
        }

        .breadcrumb-custom li:not(:last-child)::after {
            content: '/';
            margin-left: 8px;
            color: var(--color-text-muted);
        }

        .breadcrumb-custom a {
            color: var(--color-text-muted);
        }

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

        .breadcrumb-custom .active {
            color: var(--color-text-light);
            font-weight: 500;
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding-left: 28px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--color-primary);
            opacity: 0.3;
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 32px;
            background: var(--color-bg-card-light);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-card);
            padding: 20px;
            box-shadow: var(--shadow-light);
            transition: var(--transition-base);
        }

        .timeline-item:hover {
            box-shadow: var(--shadow-light-hover);
            border-color: var(--color-primary);
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 24px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--color-primary);
            border: 2px solid #fff;
            box-shadow: 0 0 0 3px rgba(124,77,255,0.2);
        }

        .timeline-date {
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 6px;
            font-weight: 500;
        }

        .timeline-title {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text-light);
        }

        .timeline-summary {
            font-size: 15px;
            color: var(--color-text-muted);
            margin-bottom: 10px;
        }

        .timeline-tag {
            display: inline-block;
            background: rgba(124,77,255,0.1);
            color: var(--color-primary);
            font-size: 13px;
            padding: 2px 10px;
            border-radius: 4px;
            margin-right: 8px;
        }

        /* Big cards for featured */
        .featured-card {
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-dark);
            display: flex;
            flex-direction: column;
            height: 100%;
            transition: var(--transition-base);
        }

        .featured-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-dark-hover);
        }

        .featured-card .featured-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            flex-shrink: 0;
        }

        .featured-card .featured-body {
            padding: 20px;
        }

        .featured-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .featured-card p {
            color: #B8B9C7;
            font-size: 15px;
            margin-bottom: 12px;
        }

        /* Stats */
        .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 15px;
            color: var(--color-text-muted);
        }

        .stat-card {
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card);
            padding: 24px;
            text-align: center;
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
        }

        .stat-card:hover {
            border-color: var(--color-cyan);
        }

        /* Tag list */
        .tag-wall {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-item {
            background: rgba(124,77,255,0.1);
            border: 1px solid rgba(124,77,255,0.2);
            color: var(--color-text-light);
            font-size: 14px;
            padding: 8px 16px;
            border-radius: 20px;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .tag-item:hover {
            background: rgba(124,77,255,0.25);
            border-color: var(--color-primary);
            color: var(--color-primary-deep);
        }

        /* FAQ accordion overrides */
        .accordion-custom .accordion-item {
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            box-shadow: var(--shadow-dark);
        }

        .accordion-custom .accordion-button {
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 18px 20px;
            border-radius: var(--radius-card);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(124,77,255,0.15);
            color: var(--color-primary);
            box-shadow: none;
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 3px var(--color-cyan);
            border-color: var(--color-primary);
        }

        .accordion-custom .accordion-button::after {
            filter: invert(1) sepia(1) saturate(5) hue-rotate(180deg);
        }

        .accordion-custom .accordion-body {
            color: #B8B9C7;
            font-size: 15px;
            line-height: 1.75;
            padding: 16px 20px;
        }

        /* Final CTA */
        .cta-banner {
            background: linear-gradient(135deg, rgba(15,17,21,0.96) 0%, rgba(59,31,122,0.85) 100%), url('/assets/images/a971b2da043a6313.webp');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-md);
            padding: 48px;
            text-align: center;
            color: #fff;
            border: 1px solid rgba(124,77,255,0.3);
            box-shadow: var(--shadow-dark);
        }

        .cta-banner h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-banner p {
            font-size: 17px;
            color: #B8B9C7;
            max-width: 720px;
            margin: 0 auto 24px;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-bg-dark);
            color: #B8B9C7;
            padding: 48px 0 24px;
            border-top: 1px solid rgba(124,77,255,0.2);
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand .brand-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #8B8FA3;
            max-width: 360px;
        }

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

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

        .site-footer ul li {
            margin-bottom: 8px;
        }

        .site-footer ul li a {
            color: #B8B9C7;
            font-size: 14px;
            transition: var(--transition-base);
        }

        .site-footer ul li a:hover {
            color: var(--color-primary);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(124,77,255,0.2);
            margin-top: 40px;
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: #8B8FA3;
        }

        .site-footer .footer-bottom a {
            color: #B8B9C7;
            margin: 0 4px;
        }

        .site-footer .footer-bottom a:hover {
            color: var(--color-primary);
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            :root {
                --spacing-section: 56px;
                --spacing-inner: 36px;
            }

            .category-banner {
                min-height: auto;
                padding: 40px 0;
            }

            .category-banner h1 {
                font-size: 30px;
            }

            .navbar-collapse {
                background: var(--color-bg-dark);
                padding: 16px;
                border-radius: 12px;
                margin-top: 12px;
                box-shadow: var(--shadow-dark);
            }

            .btn-nav-cta {
                display: inline-block;
                margin-top: 8px;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --spacing-section: 40px;
                --spacing-inner: 24px;
            }

            .section-dark h2,
            .section-light h2 {
                font-size: 24px;
            }

            .category-banner h1 {
                font-size: 26px;
            }

            .timeline {
                padding-left: 20px;
            }

            .timeline-item::before {
                left: -18px;
            }

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

            .cta-banner {
                padding: 32px 20px;
            }

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

            .featured-card .featured-img {
                height: 140px;
            }
        }

        @media (max-width: 575.98px) {
            .category-banner h1 {
                font-size: 22px;
            }

            .category-banner .banner-caption {
                font-size: 14px;
            }

            .timeline-item {
                padding: 16px;
            }

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

/* roulang page: category3 */
:root {
            --color-bg-dark: #0F1115;
            --color-bg-card-dark: #1A1D29;
            --color-bg-light: #F8F8FC;
            --color-bg-card-light: #FFFFFF;
            --color-primary: #7C4DFF;
            --color-primary-deep: #6C3CE1;
            --color-secondary: #3B1F7A;
            --color-accent: #F5A623;
            --color-cyan: #00D9FF;
            --color-text-dark: #E8E8EE;
            --color-text-light: #22242E;
            --color-text-muted: #8B8FA3;
            --color-danger: #F6455D;
            --color-border-light: #E5E7F0;
            --color-border-dark: rgba(124, 77, 255, 0.3);
            --radius-sm: 8px;
            --radius-card: 10px;
            --radius-md: 12px;
            --shadow-light: 0 4px 20px rgba(15, 17, 21, 0.06);
            --shadow-light-hover: 0 12px 32px rgba(15, 17, 21, 0.12);
            --shadow-dark: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-dark-hover: 0 12px 40px rgba(0, 0, 0, 0.5);
            --spacing-section: 80px;
            --spacing-inner: 56px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition-base: all 0.25s ease;
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 56px;
                --spacing-inner: 36px;
            }
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-light);
            background-color: var(--color-bg-light);
            overflow-x: hidden;
            margin: 0;
        }

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

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

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

        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
        }

        .section-dark {
            background-color: var(--color-bg-dark);
            color: var(--color-text-dark);
            padding: var(--spacing-section) 0;
        }

        .section-light {
            background-color: var(--color-bg-light);
            color: var(--color-text-light);
            padding: var(--spacing-section) 0;
        }

        .section-dark h2,
        .section-light h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-dark h2::after,
        .section-light h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            margin-top: 10px;
            border-radius: 2px;
        }

        .section-dark h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-dark);
        }

        .section-light h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-light);
        }

        .section-dark p,
        .section-light p {
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 12px;
        }

        .section-dark .section-desc,
        .section-light .section-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }

        .section-dark .section-desc {
            color: #A0A3B5;
        }

        /* Navigation */
        .site-header {
            background-color: rgba(15, 17, 21, 0.95);
            border-bottom: 1px solid rgba(124, 77, 255, 0.2);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .site-header .navbar {
            padding: 0;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            letter-spacing: 0.5px;
        }

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

        .site-header .navbar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }

        .site-header .navbar-nav .nav-link {
            color: #B8B9C7;
            font-weight: 500;
            font-size: 15px;
            padding: 8px 16px;
            position: relative;
            transition: color 0.25s ease;
        }

        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link:focus {
            color: #fff;
        }

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

        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            display: block;
            width: 24px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
            margin: 4px auto 0;
            transition: width 0.25s ease;
        }

        .site-header .nav-link:not(.active)::after {
            content: '';
            display: block;
            width: 0;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
            margin: 4px auto 0;
            transition: width 0.25s ease;
        }

        .site-header .nav-link:hover::after {
            width: 18px;
        }

        .btn-nav-cta {
            background: var(--color-accent);
            color: #1A1D29;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
            border: none;
            white-space: nowrap;
        }

        .btn-nav-cta:hover {
            background: #E09810;
            color: #1A1D29;
            transform: translateY(-2px);
        }

        .btn-nav-cta:active {
            transform: scale(0.98);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            background: rgba(26, 29, 41, 0.6);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
        }

        .navbar-toggler:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        .navbar-toggler .fa-bars {
            font-size: 18px;
            color: #fff;
        }

        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background-color: rgba(15, 17, 21, 0.98);
                border-radius: var(--radius-md);
                padding: 16px 20px;
                margin-top: 12px;
                border: 1px solid rgba(124, 77, 255, 0.25);
            }
            .site-header .navbar-nav .nav-link {
                padding: 10px 8px;
                font-size: 15px;
            }
            .btn-nav-cta {
                margin-top: 8px;
                width: 100%;
            }
            .site-header .navbar-nav .nav-link.active::after {
                margin: 4px 0 0;
            }
            .site-header .nav-link:not(.active)::after {
                margin: 4px 0 0;
            }
        }

        /* Category Hero Banner */
        .category-hero {
            min-height: 40vh;
            background-color: var(--color-bg-dark);
            background-image: linear-gradient(140deg, rgba(15,17,21,0.92) 0%, rgba(25,22,50,0.88) 45%, rgba(124,77,255,0.45) 100%), url('/assets/images/a971b2da043a6313.webp');
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
            position: relative;
            border-bottom: 1px solid rgba(124, 77, 255, 0.25);
        }

        .category-hero::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, rgba(15,17,21,0.65), transparent);
            pointer-events: none;
        }

        .category-hero .breadcrumb-wrap {
            background: rgba(15, 17, 21, 0.6);
            border: 1px solid rgba(124, 77, 255, 0.3);
            border-radius: var(--radius-sm);
            padding: 8px 16px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            position: relative;
            z-index: 5;
        }

        .category-hero .breadcrumb {
            margin: 0;
            padding: 0;
            background: none;
        }

        .category-hero .breadcrumb-item,
        .category-hero .breadcrumb-item a {
            font-size: 14px;
            color: #B8B9C7;
            text-decoration: none;
        }

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

        .category-hero .breadcrumb-item.active {
            color: var(--color-text-dark);
            font-weight: 500;
        }

        .category-hero .breadcrumb-item+.breadcrumb-item::before {
            color: #5A5D70;
            content: '/';
            padding: 0 8px;
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
            position: relative;
            z-index: 5;
        }

        .category-hero .hero-tagline {
            font-size: 17px;
            color: #C5C6D0;
            max-width: 640px;
            line-height: 1.75;
            position: relative;
            z-index: 5;
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .category-hero {
                min-height: auto;
                padding: 80px 0 60px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero .hero-tagline {
                font-size: 15px;
            }
        }

        /* Buttons */
        .btn-primary-custom {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            text-decoration: none;
            cursor: pointer;
        }

        .btn-primary-custom:hover {
            background: var(--color-primary-deep);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(124, 77, 255, 0.35);
        }

        .btn-primary-custom:active {
            transform: scale(0.98);
        }

        .btn-secondary-custom {
            background: transparent;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            border: 1.5px solid var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            text-decoration: none;
            cursor: pointer;
        }

        .btn-secondary-custom:hover {
            background: rgba(124, 77, 255, 0.1);
            color: var(--color-primary);
            transform: translateY(-2px);
        }

        .btn-secondary-custom:active {
            transform: scale(0.98);
        }

        .btn-ghost-light {
            background: transparent;
            color: #fff;
            font-weight: 500;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.4);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            text-decoration: none;
            cursor: pointer;
        }

        .btn-ghost-light:hover {
            background: rgba(124, 77, 255, 0.2);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
            transform: translateY(-2px);
        }

        .btn-read-more {
            background: transparent;
            color: var(--color-primary);
            font-weight: 500;
            font-size: 13px;
            padding: 6px 16px;
            border-radius: var(--radius-sm);
            border: 1.5px solid var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
            text-decoration: none;
            cursor: pointer;
        }

        .btn-read-more:hover {
            background: rgba(124, 77, 255, 0.1);
            color: var(--color-primary-deep);
            border-color: var(--color-primary-deep);
        }

        .btn-read-more:active {
            transform: scale(0.97);
        }

        .btn-accent-custom {
            background: var(--color-accent);
            color: #1A1D29;
            font-weight: 700;
            font-size: 15px;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            text-decoration: none;
            cursor: pointer;
        }

        .btn-accent-custom:hover {
            background: #E09810;
            color: #1A1D29;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(245, 166, 35, 0.3);
        }

        /* Cards */
        .card-news-main {
            background: var(--color-bg-card-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-light);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .card-news-main:hover {
            box-shadow: var(--shadow-light-hover);
            transform: translateY(-4px);
            border-color: var(--color-primary);
        }

        .card-news-main .news-img {
            aspect-ratio: 16/9;
            background-color: #EAEBF2;
            overflow: hidden;
        }

        .card-news-main .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .card-news-main:hover .news-img img {
            transform: scale(1.04);
        }

        .card-news-main .news-body {
            padding: 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-date {
            font-size: 13px;
            color: var(--color-text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 10px;
        }

        .news-date i {
            color: var(--color-primary);
            font-size: 13px;
        }

        .news-main-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-light);
            line-height: 1.45;
            margin-bottom: 12px;
        }

        .news-main-desc {
            font-size: 15px;
            color: #5F6270;
            line-height: 1.8;
            margin-bottom: 18px;
            flex: 1;
        }

        .news-list-item {
            background: var(--color-bg-card-light);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-light);
            padding: 18px 22px;
            margin-bottom: 14px;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .news-list-item:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-light-hover);
            transform: translateX(4px);
        }

        .news-list-item .news-list-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-light);
            line-height: 1.45;
            margin-bottom: 4px;
        }

        .news-list-item .news-list-desc {
            font-size: 14px;
            color: #5F6270;
            line-height: 1.7;
            margin-bottom: 8px;
        }

        .news-list-item .news-meta-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }

        .news-list-item .news-date {
            margin-bottom: 0;
            font-size: 13px;
        }

        .news-tag {
            background: rgba(124, 77, 255, 0.1);
            color: var(--color-primary);
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 4px;
            font-weight: 500;
        }

        /* Dark Cards */
        .card-dark-custom {
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
            overflow: hidden;
        }

        .card-dark-custom:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-dark-hover);
            transform: translateY(-3px);
        }

        /* Badges and Tags */
        .badge-custom {
            background: var(--color-secondary);
            color: #fff;
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 20px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .badge-accent {
            background: var(--color-accent);
            color: #1A1D29;
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 20px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .tag-wall {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-wall .tag-item {
            background: rgba(124, 77, 255, 0.12);
            color: var(--color-primary);
            font-size: 13px;
            padding: 8px 18px;
            border-radius: 20px;
            font-weight: 500;
            transition: var(--transition-base);
            border: 1px solid transparent;
            cursor: default;
            text-decoration: none;
        }

        .tag-wall .tag-item:hover {
            background: rgba(124, 77, 255, 0.22);
            border-color: var(--color-primary);
            color: var(--color-primary-deep);
        }

        .tag-wall-dark .tag-item {
            background: rgba(124, 77, 255, 0.18);
            color: #D4C5FF;
            border: 1px solid rgba(124, 77, 255, 0.35);
        }

        .tag-wall-dark .tag-item:hover {
            background: rgba(124, 77, 255, 0.32);
            border-color: var(--color-primary);
            color: #fff;
        }

        /* Stats */
        .stat-card {
            text-align: center;
            padding: 28px 20px;
            border-radius: var(--radius-card);
            transition: var(--transition-base);
        }

        .stat-card .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .stat-card .stat-unit {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-accent);
        }

        .stat-card .stat-label {
            font-size: 15px;
            color: #A0A3B5;
            margin-top: 4px;
        }

        .stat-card .stat-icon {
            font-size: 28px;
            color: var(--color-cyan);
            margin-bottom: 10px;
        }

        .stat-card-dark {
            background: var(--color-bg-card-dark);
            border: 1px solid rgba(124, 77, 255, 0.25);
        }

        .stat-card-light {
            background: var(--color-bg-card-light);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-light);
        }

        .stat-card-light .stat-number {
            color: var(--color-primary);
        }
        .stat-card-light .stat-unit {
            color: var(--color-primary);
        }
        .stat-card-light .stat-label {
            color: var(--color-text-muted);
        }

        /* FAQ */
        .accordion-custom .accordion-item {
            background: var(--color-bg-card-dark);
            border: 1px solid rgba(124, 77, 255, 0.25);
            border-radius: var(--radius-card) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-dark);
        }

        .accordion-custom .accordion-button {
            background: var(--color-bg-card-dark);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            border-radius: var(--radius-card) !important;
            transition: var(--transition-base);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(124, 77, 255, 0.12);
            color: #fff;
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            background: none;
            color: var(--color-primary);
            font-size: 14px;
            transition: transform 0.3s ease;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--color-accent);
        }

        .accordion-custom .accordion-button:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        .accordion-custom .accordion-body {
            background: rgba(15, 17, 21, 0.6);
            color: #C5C6D0;
            font-size: 15px;
            line-height: 1.8;
            padding: 16px 22px 20px;
            border-top: 1px solid rgba(124, 77, 255, 0.15);
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--color-bg-dark);
            background-image: linear-gradient(135deg, rgba(15,17,21,0.95) 0%, rgba(25,22,50,0.9) 50%, rgba(124,77,255,0.35) 100%);
            padding: 64px 0;
            text-align: center;
            border-top: 1px solid rgba(124, 77, 255, 0.25);
            border-bottom: 1px solid rgba(124, 77, 255, 0.25);
        }

        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .cta-section p {
            font-size: 16px;
            color: #C5C6D0;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        .cta-section .btn-group-custom {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* Wide announcement card */
        .announce-card {
            background: var(--color-bg-card-dark);
            border: 1px solid rgba(124, 77, 255, 0.3);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-dark);
            display: flex;
            flex-direction: row;
            transition: var(--transition-base);
        }

        .announce-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-dark-hover);
        }

        .announce-card .announce-img {
            flex: 0 0 42%;
            min-height: 220px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .announce-card .announce-body {
            flex: 1;
            padding: 32px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .announce-card .announce-title {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.45;
        }

        .announce-card .announce-desc {
            font-size: 15px;
            color: #C5C6D0;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        @media (max-width: 768px) {
            .announce-card {
                flex-direction: column;
            }
            .announce-card .announce-img {
                flex: none;
                min-height: 180px;
                aspect-ratio: 16/9;
            }
            .announce-card .announce-body {
                padding: 22px 20px;
            }
        }

        /* Feature icon list */
        .feature-icon-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--color-border-light);
        }

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

        .feature-icon-item .fi-icon {
            width: 46px;
            height: 46px;
            background: rgba(124, 77, 255, 0.12);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 20px;
            flex-shrink: 0;
        }

        .feature-icon-item .fi-text h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text-light);
            margin-bottom: 4px;
        }

        .feature-icon-item .fi-text p {
            font-size: 14px;
            color: #5F6270;
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-bg-dark);
            color: #A0A3B5;
            padding: 60px 0 24px;
            border-top: 1px solid rgba(124, 77, 255, 0.2);
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }

        .site-footer .footer-desc {
            font-size: 15px;
            line-height: 1.8;
            color: #8B8FA3;
            margin-bottom: 0;
            max-width: 320px;
        }

        .site-footer .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

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

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

        .site-footer ul li a {
            font-size: 14px;
            color: #8B8FA3;
            transition: var(--transition-base);
            text-decoration: none;
        }

        .site-footer ul li a:hover {
            color: var(--color-primary);
        }

        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 14px;
            color: #6F7285;
        }

        .site-footer .footer-bottom a {
            color: #8B8FA3;
            transition: var(--transition-base);
            text-decoration: none;
        }

        .site-footer .footer-bottom a:hover {
            color: var(--color-primary);
        }

        /* Section spacing for category page */
        .category-main section {
            padding: var(--spacing-section) 0;
        }

        /* Overview block */
        .overview-text {
            font-size: 17px;
            line-height: 1.95;
            color: #3A3D4F;
            max-width: 800px;
        }

        /* Responsive adjustments */
        @media (max-width: 991.98px) {
            .section-dark h2,
            .section-light h2 {
                font-size: 24px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .stat-card .stat-number {
                font-size: 34px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
        }

        @media (max-width: 767.98px) {
            .section-dark h2,
            .section-light h2 {
                font-size: 22px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .btn-primary-custom,
            .btn-secondary-custom,
            .btn-accent-custom,
            .btn-ghost-light {
                font-size: 14px;
                padding: 10px 20px;
            }
            .card-news-main .news-body {
                padding: 18px 18px;
            }
            .news-main-title {
                font-size: 17px;
            }
            .news-list-item {
                padding: 14px 16px;
            }
            .announce-card .announce-body {
                padding: 18px 16px;
            }
            .announce-card .announce-title {
                font-size: 17px;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .stat-card .stat-number {
                font-size: 30px;
            }
            .site-footer {
                padding: 40px 0 20px;
            }
        }

        @media (max-width: 575.98px) {
            .category-hero {
                padding: 56px 0 44px;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .category-hero .hero-tagline {
                font-size: 14px;
            }
            .news-list-item .news-list-title {
                font-size: 15px;
            }
            .news-list-item .news-list-desc {
                font-size: 13px;
            }
            .btn-nav-cta {
                font-size: 13px;
                padding: 8px 16px;
            }
            .site-header .navbar-brand {
                font-size: 17px;
            }
            .site-header .navbar-brand .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .news-list-item .news-meta-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .cta-section h2 {
                font-size: 20px;
            }
        }

/* roulang page: category4 */
:root {
            --color-bg-dark: #0F1115;
            --color-bg-card-dark: #1A1D29;
            --color-bg-light: #F8F8FC;
            --color-bg-card-light: #FFFFFF;
            --color-primary: #7C4DFF;
            --color-primary-deep: #6C3CE1;
            --color-secondary: #3B1F7A;
            --color-accent: #F5A623;
            --color-cyan: #00D9FF;
            --color-text-dark: #E8E8EE;
            --color-text-light: #22242E;
            --color-text-muted: #8B8FA3;
            --color-danger: #F6455D;
            --color-border-light: #E5E7F0;
            --color-border-dark: rgba(124, 77, 255, 0.3);
            --radius-sm: 8px;
            --radius-card: 10px;
            --radius-md: 12px;
            --shadow-light: 0 4px 20px rgba(15, 17, 21, 0.06);
            --shadow-light-hover: 0 12px 32px rgba(15, 17, 21, 0.12);
            --shadow-dark: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-dark-hover: 0 12px 40px rgba(0, 0, 0, 0.5);
            --spacing-section: 64px;
            --spacing-inner: 40px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-light);
            background-color: var(--color-bg-light);
            overflow-x: hidden;
        }

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

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

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

        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
        }

        .section-dark {
            background-color: var(--color-bg-dark);
            color: var(--color-text-dark);
            padding: var(--spacing-section) 0;
        }

        .section-light {
            background-color: var(--color-bg-light);
            color: var(--color-text-light);
            padding: var(--spacing-section) 0;
        }

        .section-dark .text-muted-custom,
        .section-light .text-muted-custom {
            color: var(--color-text-muted);
            font-size: 15px;
        }

        .section-dark h2,
        .section-light h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-dark h2::after,
        .section-light h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            margin-top: 10px;
            border-radius: 2px;
        }

        .section-dark h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-dark);
        }

        .section-light h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-light);
        }

        .section-dark p,
        .section-light p {
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 12px;
        }

        .section-dark .section-desc,
        .section-light .section-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }

        .section-dark .section-desc {
            color: #A0A3B5;
        }

        /* Navigation */
        .site-header {
            background-color: rgba(15, 17, 21, 0.95);
            border-bottom: 1px solid rgba(124, 77, 255, 0.2);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .site-header .navbar {
            padding: 0;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            letter-spacing: 0.5px;
        }

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

        .site-header .navbar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }

        .site-header .navbar-nav .nav-link {
            color: #B8B9C7;
            font-weight: 500;
            font-size: 15px;
            padding: 8px 16px;
            position: relative;
            transition: color 0.25s ease;
        }

        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link:focus {
            color: #fff;
        }

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

        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            display: block;
            width: 24px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
            margin-top: 4px;
            transition: width 0.25s ease;
        }

        .site-header .navbar-nav .nav-link:not(.active)::after {
            content: '';
            display: block;
            width: 0;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
            margin-top: 4px;
            transition: width 0.25s ease;
        }

        .site-header .navbar-nav .nav-link:hover::after {
            width: 24px;
        }

        .btn-nav-cta {
            background: var(--color-accent);
            color: #1A1D29;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .btn-nav-cta:hover {
            background: #e09415;
            color: #1A1D29;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 166, 35, 0.3);
        }

        .btn-nav-cta:active {
            transform: scale(0.98);
        }

        .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 22px;
            padding: 6px 10px;
            background: rgba(124, 77, 255, 0.15);
            border-radius: 6px;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 3px solid var(--color-cyan);
        }

        /* Buttons */
        .btn-primary-custom {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-primary-custom:hover {
            background: var(--color-primary-deep);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(124, 77, 255, 0.35);
        }

        .btn-primary-custom:active {
            transform: scale(0.98);
        }

        .btn-accent {
            background: var(--color-accent);
            color: #1A1D29;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-accent:hover {
            background: #e09415;
            color: #1A1D29;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 166, 35, 0.35);
        }

        .btn-accent:active {
            transform: scale(0.98);
        }

        .btn-outline-secondary {
            background: transparent;
            color: var(--color-primary);
            font-weight: 500;
            font-size: 14px;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            border: 1.5px solid var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-outline-secondary:hover {
            background: rgba(124, 77, 255, 0.12);
            color: var(--color-primary);
            border-color: var(--color-primary);
            transform: translateY(-2px);
        }

        .btn-outline-secondary:active {
            transform: scale(0.98);
        }

        .btn-ghost-light {
            background: transparent;
            color: #fff;
            font-weight: 500;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.4);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-ghost-light:hover {
            background: rgba(124, 77, 255, 0.2);
            color: #fff;
            border-color: var(--color-primary);
        }

        .btn-read-more {
            background: transparent;
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 6px;
            border: 1px solid var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-read-more:hover {
            background: rgba(124, 77, 255, 0.1);
            color: var(--color-primary);
            border-color: var(--color-cyan);
        }

        /* Cards */
        .card-light {
            background: var(--color-bg-card-light);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-light);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
        }

        .card-light:hover {
            box-shadow: var(--shadow-light-hover);
            transform: translateY(-4px);
            border-color: var(--color-primary);
        }

        .card-dark {
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
        }

        .card-dark:hover {
            box-shadow: var(--shadow-dark-hover);
            border-color: var(--color-primary);
            transform: translateY(-4px);
        }

        /* Badge */
        .badge-custom {
            display: inline-block;
            background: rgba(124, 77, 255, 0.1);
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }

        .badge-accent {
            display: inline-block;
            background: var(--color-accent);
            color: #1A1D29;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-bg-dark);
            color: #B8B9C7;
            padding: 48px 0 24px;
            border-top: 1px solid rgba(124, 77, 255, 0.15);
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand .brand-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #8B8FA3;
            margin-bottom: 0;
        }

        .site-footer .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

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

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

        .site-footer ul li a {
            color: #B8B9C7;
            font-size: 14px;
            transition: var(--transition-base);
        }

        .site-footer ul li a:hover {
            color: var(--color-primary);
            padding-left: 4px;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 36px;
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: #8B8FA3;
        }

        .site-footer .footer-bottom a {
            color: #B8B9C7;
            font-weight: 500;
        }

        .site-footer .footer-bottom a:hover {
            color: var(--color-primary);
        }

        /* Category page specific */
        .breadcrumb-banner {
            background-color: var(--color-bg-dark);
            color: var(--color-text-dark);
            padding: 64px 0 48px;
            position: relative;
            overflow: hidden;
        }

        .breadcrumb-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(15, 17, 21, 0.92) 0%, rgba(15, 17, 21, 0.65) 50%, rgba(15, 17, 21, 0.85) 100%), url('/assets/images/22f914bdc905364e.jpg');
            background-size: cover;
            background-position: center;
            z-index: 0;
        }

        .breadcrumb-banner .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb-banner .breadcrumb {
            margin-bottom: 20px;
            font-size: 14px;
        }

        .breadcrumb-banner .breadcrumb a {
            color: #B8B9C7;
            transition: var(--transition-base);
        }

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

        .breadcrumb-banner .breadcrumb-item.active {
            color: var(--color-cyan);
        }

        .breadcrumb-banner h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 12px;
        }

        .breadcrumb-banner .banner-sub {
            font-size: 16px;
            color: #A0A3B5;
            max-width: 620px;
        }

        /* Category overview */
        .overview-panel {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .overview-panel .overview-text {
            flex: 1;
        }

        .overview-panel .overview-icon-box {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 36px;
            flex-shrink: 0;
        }

        /* Team cards */
        .team-card {
            background: var(--color-bg-card-light);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-light);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .team-card:hover {
            box-shadow: var(--shadow-light-hover);
            transform: translateY(-4px);
            border-color: var(--color-primary);
        }

        .team-card .team-img {
            aspect-ratio: 16/9;
            background-color: #EAEBF2;
            overflow: hidden;
        }

        .team-card .team-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .team-card .team-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .team-card .team-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-light);
            margin-bottom: 6px;
        }

        .team-card .team-meta {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 10px;
        }

        .team-card .team-desc {
            font-size: 14px;
            color: #55586B;
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }

        /* Feature cards */
        .feature-horizontal-card {
            display: flex;
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition-base);
            box-shadow: var(--shadow-dark);
            height: 100%;
        }

        .feature-horizontal-card:hover {
            box-shadow: var(--shadow-dark-hover);
            border-color: var(--color-primary);
            transform: translateY(-4px);
        }

        .feature-horizontal-card .feature-img {
            width: 220px;
            flex-shrink: 0;
            background-color: #EAEBF2;
        }

        .feature-horizontal-card .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .feature-horizontal-card .feature-content {
            padding: 24px;
            flex: 1;
        }

        .feature-horizontal-card .feature-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .feature-horizontal-card .feature-content p {
            font-size: 14px;
            color: #A0A3B5;
            line-height: 1.75;
            margin-bottom: 14px;
        }

        /* Stats */
        .stat-card {
            text-align: center;
            padding: 24px 12px;
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            transition: var(--transition-base);
            height: 100%;
        }

        .stat-card:hover {
            box-shadow: var(--shadow-dark-hover);
            border-color: var(--color-primary);
            transform: translateY(-4px);
        }

        .stat-card .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-card .stat-label {
            font-size: 15px;
            color: #A0A3B5;
            font-weight: 500;
        }

        /* Tag wall */
        .tag-wall {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-wall .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
            border: 1px solid var(--color-border-light);
            border-radius: 24px;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-light);
            transition: var(--transition-base);
        }

        .tag-wall .tag-item:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(124, 77, 255, 0.06);
            transform: translateY(-2px);
        }

        /* FAQ */
        .accordion-custom .accordion-item {
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-dark);
        }

        .accordion-custom .accordion-button {
            background: var(--color-bg-card-dark);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 18px 20px;
            border: none;
            box-shadow: none;
            border-radius: var(--radius-card) !important;
            transition: var(--transition-base);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(124, 77, 255, 0.12);
            color: #fff;
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            background-image: none;
            content: '\f067';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--color-primary);
            transition: transform 0.3s ease;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
            content: '\f00d';
        }

        .accordion-custom .accordion-button:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: -3px;
        }

        .accordion-custom .accordion-body {
            background: var(--color-bg-card-dark);
            color: #A0A3B5;
            font-size: 15px;
            line-height: 1.75;
            padding: 0 20px 18px;
        }

        /* CTA section */
        .cta-banner {
            background: linear-gradient(135deg, rgba(124, 77, 255, 0.15), rgba(59, 31, 122, 0.25));
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-md);
            padding: 48px 32px;
            text-align: center;
            box-shadow: var(--shadow-dark);
        }

        .cta-banner h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-banner p {
            color: #A0A3B5;
            font-size: 16px;
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        .cta-banner .btn-group-custom {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Responsive */
        @media (max-width: 991px) {
            .site-header .navbar-collapse {
                background: rgba(15, 17, 21, 0.98);
                border-radius: 10px;
                padding: 16px;
                margin-top: 12px;
                border: 1px solid rgba(124, 77, 255, 0.2);
            }

            .btn-nav-cta {
                margin-top: 12px;
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 767px) {
            :root {
                --spacing-section: 40px;
                --spacing-inner: 24px;
            }

            .breadcrumb-banner {
                padding: 48px 0 36px;
            }

            .breadcrumb-banner h1 {
                font-size: 28px;
            }

            .section-dark h2,
            .section-light h2 {
                font-size: 24px;
            }

            .overview-panel {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }

            .overview-panel .overview-icon-box {
                width: 56px;
                height: 56px;
                font-size: 24px;
                border-radius: 12px;
            }

            .feature-horizontal-card {
                flex-direction: column;
            }

            .feature-horizontal-card .feature-img {
                width: 100%;
                aspect-ratio: 16/9;
            }

            .feature-horizontal-card .feature-content {
                padding: 18px;
            }

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

            .cta-banner {
                padding: 32px 18px;
            }

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

            .btn-group-custom .btn-primary-custom,
            .btn-group-custom .btn-outline-secondary,
            .btn-group-custom .btn-accent,
            .btn-group-custom .btn-ghost-light {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 575px) {
            .breadcrumb-banner h1 {
                font-size: 24px;
            }

            .section-dark h2,
            .section-light h2 {
                font-size: 22px;
            }

            .team-card .team-title {
                font-size: 16px;
            }
        }

/* roulang page: category5 */
:root {
            --color-bg-dark: #0F1115;
            --color-bg-card-dark: #1A1D29;
            --color-bg-light: #F8F8FC;
            --color-bg-card-light: #FFFFFF;
            --color-primary: #7C4DFF;
            --color-primary-deep: #6C3CE1;
            --color-secondary: #3B1F7A;
            --color-accent: #F5A623;
            --color-cyan: #00D9FF;
            --color-text-dark: #E8E8EE;
            --color-text-light: #22242E;
            --color-text-muted: #8B8FA3;
            --color-danger: #F6455D;
            --color-border-light: #E5E7F0;
            --color-border-dark: rgba(124, 77, 255, 0.3);
            --radius-sm: 8px;
            --radius-card: 10px;
            --radius-md: 12px;
            --shadow-light: 0 4px 20px rgba(15, 17, 21, 0.06);
            --shadow-light-hover: 0 12px 32px rgba(15, 17, 21, 0.12);
            --shadow-dark: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-dark-hover: 0 12px 40px rgba(0, 0, 0, 0.5);
            --spacing-section: 80px;
            --spacing-inner: 56px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-light);
            background-color: var(--color-bg-light);
            overflow-x: hidden;
        }

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

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

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

        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
        }

        .section-dark {
            background-color: var(--color-bg-dark);
            color: var(--color-text-dark);
            padding: var(--spacing-section) 0;
        }

        .section-light {
            background-color: var(--color-bg-light);
            color: var(--color-text-light);
            padding: var(--spacing-section) 0;
        }

        .section-dark h2,
        .section-light h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-dark h2::after,
        .section-light h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            margin-top: 10px;
            border-radius: 2px;
        }

        .section-dark h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-dark);
        }

        .section-light h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text-light);
        }

        .section-dark p,
        .section-light p {
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 12px;
        }

        .section-dark .section-desc,
        .section-light .section-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }

        .section-dark .section-desc {
            color: #A0A3B5;
        }

        /* Navigation */
        .site-header {
            background-color: rgba(15, 17, 21, 0.95);
            border-bottom: 1px solid rgba(124, 77, 255, 0.2);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .site-header .navbar {
            padding: 0;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            letter-spacing: 0.5px;
        }

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

        .site-header .navbar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }

        .site-header .navbar-nav .nav-link {
            color: #B8B9C7;
            font-weight: 500;
            font-size: 15px;
            padding: 8px 16px;
            position: relative;
            transition: color 0.25s ease;
        }

        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link:focus {
            color: #fff;
        }

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

        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 0;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .site-header .navbar-toggler {
            border: 1px solid rgba(124, 77, 255, 0.4);
            color: #fff;
            background: rgba(124, 77, 255, 0.15);
            padding: 8px 12px;
            border-radius: 6px;
        }

        .site-header .navbar-toggler:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
            box-shadow: none;
        }

        .site-header .navbar-toggler i {
            font-size: 18px;
            color: #C8C9D6;
        }

        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-accent);
            color: #1A1A1A;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            border: none;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .btn-nav-cta:hover {
            background: #FFB938;
            color: #1A1A1A;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(245, 166, 35, 0.3);
        }

        .btn-nav-cta:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        /* Buttons */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            border: none;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-primary-custom:hover {
            background: var(--color-primary-deep);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(124, 77, 255, 0.35);
        }

        .btn-primary-custom:active {
            transform: scale(0.98);
        }

        .btn-accent-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-accent);
            color: #1A1A1A;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            border: none;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-accent-custom:hover {
            background: #FFB938;
            color: #1A1A1A;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(245, 166, 35, 0.35);
        }

        .btn-accent-custom:active {
            transform: scale(0.98);
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            border: 1.5px solid var(--color-primary);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-outline-custom:hover {
            background: rgba(124, 77, 255, 0.12);
            color: var(--color-primary-deep);
            border-color: var(--color-primary-deep);
            transform: translateY(-2px);
        }

        .btn-outline-custom:active {
            transform: scale(0.98);
        }

        .btn-outline-cyan {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: transparent;
            color: var(--color-cyan);
            font-weight: 600;
            font-size: 14px;
            padding: 6px 16px;
            border-radius: var(--radius-sm);
            border: 1.5px solid var(--color-cyan);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-outline-cyan:hover {
            background: rgba(0, 217, 255, 0.12);
            color: var(--color-cyan);
            border-color: var(--color-cyan);
            transform: translateY(-2px);
        }

        /* Cards */
        .card-service-light {
            background: var(--color-bg-card-light);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-light);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
        }

        .card-service-light:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-light-hover);
            transform: translateY(-4px);
        }

        .card-service-dark {
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
        }

        .card-service-dark:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-dark-hover);
            transform: translateY(-4px);
        }

        /* Badge */
        .badge-custom {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(124, 77, 255, 0.1);
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            white-space: nowrap;
        }

        .badge-accent {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--color-accent);
            color: #1A1A1A;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            white-space: nowrap;
        }

        .badge-cyan {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(0, 217, 255, 0.15);
            color: var(--color-cyan);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            white-space: nowrap;
        }

        .badge-dark {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(124, 77, 255, 0.2);
            color: #C8B8F5;
            font-size: 13px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 20px;
            white-space: nowrap;
        }

        /* Service item image */
        .service-img-wrapper {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-card);
            background: #EAEBF2;
            aspect-ratio: 16 / 10;
            flex-shrink: 0;
        }

        .service-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .service-img-wrapper:hover img {
            transform: scale(1.05);
        }

        /* Category hero */
        .category-hero {
            background: url('/assets/images/a971b2da043a6313.webp') center / cover no-repeat;
            position: relative;
            min-height: 40vh;
            display: flex;
            align-items: center;
            padding: 80px 0 64px;
            color: #fff;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 17, 21, 0.92) 0%, rgba(59, 31, 122, 0.82) 50%, rgba(15, 17, 21, 0.9) 100%);
            z-index: 1;
        }

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

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
            font-size: 14px;
            flex-wrap: wrap;
        }

        .breadcrumb-custom li {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #A0A3B5;
        }

        .breadcrumb-custom li:not(:last-child)::after {
            content: '/';
            color: #8B8FA3;
            font-size: 12px;
            margin-left: 4px;
        }

        .breadcrumb-custom a {
            color: #C8C9D6;
            font-weight: 500;
        }

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

        .breadcrumb-custom .current {
            color: var(--color-accent);
            font-weight: 600;
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 12px;
            color: #fff;
        }

        .category-hero .hero-subtitle {
            font-size: 16px;
            color: #C8C9D6;
            margin: 0;
            max-width: 560px;
            line-height: 1.8;
        }

        /* Section heading with badge */
        .section-heading-wrapper {
            margin-bottom: 36px;
        }

        .section-heading-wrapper h2 {
            margin-bottom: 8px;
        }

        .section-heading-wrapper .section-desc {
            margin-bottom: 0;
        }

        /* Feature icon wall */
        .icon-wall-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 20px;
            background: var(--color-bg-card-dark);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-card);
            transition: var(--transition-base);
            height: 100%;
        }

        .icon-wall-item:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-dark-hover);
            transform: translateY(-4px);
        }

        .icon-wall-item .icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(124, 77, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 20px;
            flex-shrink: 0;
        }

        .icon-wall-item h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
            color: #fff;
        }

        .icon-wall-item p {
            font-size: 14px;
            color: #A0A3B5;
            line-height: 1.7;
            margin: 0;
        }

        /* Data stat bar */
        .stat-bar-item {
            text-align: center;
            padding: 20px 12px;
            background: rgba(26, 29, 41, 0.7);
            border: 1px solid rgba(124, 77, 255, 0.2);
            border-radius: var(--radius-card);
            transition: var(--transition-base);
            height: 100%;
        }

        .stat-bar-item:hover {
            border-color: var(--color-cyan);
            box-shadow: 0 8px 24px rgba(0, 217, 255, 0.15);
        }

        .stat-bar-item .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .stat-bar-item .stat-label {
            font-size: 14px;
            color: #A0A3B5;
            font-weight: 500;
            margin: 0;
        }

        .stat-bar-item .stat-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            color: var(--color-cyan);
            font-weight: 600;
            margin-top: 8px;
        }

        /* FAQ accordion */
        .accordion-custom .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid rgba(124, 77, 255, 0.2);
            border-radius: 0;
        }

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

        .accordion-custom .accordion-button {
            background: transparent;
            color: #E8E8EE;
            font-weight: 600;
            font-size: 16px;
            padding: 18px 0;
            border: none;
            box-shadow: none;
            transition: var(--transition-base);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            color: var(--color-accent);
            background: transparent;
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            background-image: none;
            content: '+';
            color: var(--color-primary);
            font-weight: 700;
            font-size: 22px;
            line-height: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            content: '−';
            color: var(--color-accent);
            transform: rotate(180deg);
        }

        .accordion-custom .accordion-button:focus {
            outline: 3px solid var(--color-cyan);
            outline-offset: 2px;
        }

        .accordion-custom .accordion-body {
            color: #A0A3B5;
            font-size: 15px;
            line-height: 1.75;
            padding: 0 0 16px;
        }

        /* Service row layout */
        .service-row {
            display: flex;
            align-items: center;
            gap: 28px;
            margin-bottom: 36px;
            padding: 24px;
            background: var(--color-bg-card-light);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-light);
            transition: var(--transition-base);
        }

        .service-row:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-light-hover);
            transform: translateY(-4px);
        }

        .service-row .service-img-wrapper {
            width: 320px;
            aspect-ratio: 16 / 10;
            border-radius: var(--radius-card);
            overflow: hidden;
            flex-shrink: 0;
        }

        .service-row .service-content {
            flex: 1;
            min-width: 0;
        }

        .service-row .service-content h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text-light);
        }

        .service-row .service-content .service-summary {
            font-size: 15px;
            color: #4A4C5A;
            line-height: 1.75;
            margin-bottom: 12px;
        }

        .service-row .service-content .service-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }

        .service-row.service-row-reverse {
            flex-direction: row-reverse;
        }

        @media (max-width: 768px) {
            .service-row {
                flex-direction: column !important;
                align-items: flex-start;
                gap: 16px;
                padding: 16px;
            }

            .service-row .service-img-wrapper {
                width: 100%;
                aspect-ratio: 16 / 9;
            }

            .category-hero {
                min-height: auto;
                padding: 56px 0 48px;
            }

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

        @media (max-width: 576px) {
            :root {
                --spacing-section: 56px;
                --spacing-inner: 36px;
            }

            .section-dark h2,
            .section-light h2 {
                font-size: 24px;
            }

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

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

            .btn-primary-custom,
            .btn-accent-custom,
            .btn-outline-custom {
                font-size: 14px;
                padding: 10px 18px;
            }
        }

        @media (max-width: 992px) {
            .site-header .navbar-collapse {
                background: rgba(15, 17, 21, 0.98);
                border: 1px solid rgba(124, 77, 255, 0.2);
                border-radius: 10px;
                padding: 16px;
                margin-top: 10px;
            }

            .site-header .navbar-nav .nav-link.active::after {
                display: none;
            }

            .btn-nav-cta {
                margin-top: 10px;
                width: 100%;
                justify-content: center;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--color-bg-dark);
            color: #A0A3B5;
            padding: 56px 0 24px;
            border-top: 1px solid rgba(124, 77, 255, 0.2);
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #8B8FA3;
            margin-bottom: 0;
        }

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

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

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

        .site-footer ul li a {
            color: #A0A3B5;
            font-size: 14px;
            transition: var(--transition-base);
        }

        .site-footer ul li a:hover {
            color: var(--color-primary);
            padding-left: 4px;
        }

        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(124, 77, 255, 0.15);
            text-align: center;
            font-size: 13px;
            color: #6B6D7F;
        }

        .site-footer .footer-bottom a {
            color: #8B8FA3;
            font-size: 13px;
        }

        .site-footer .footer-bottom a:hover {
            color: var(--color-primary);
        }

        .footer-bottom p {
            margin-bottom: 0;
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}