/* roulang page: index */
:root {
            --bg-main: #0a0e1f;
            --bg-secondary: #111a2e;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.12);
            --border-card: rgba(255, 255, 255, 0.16);
            --primary: #38bdf8;
            --primary-dark: #0ea5e9;
            --accent: #8b5cf6;
            --accent-green: #34d399;
            --warning: #f59e0b;
            --text-main: #e6eaf2;
            --text-secondary: #9aa3b5;
            --text-muted: #5f6a7f;
            --radius-card: 14px;
            --radius-btn: 10px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 18px rgba(56, 189, 248, 0.6);
            --font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --spacing-section: 90px;
            --spacing-section-mobile: 56px;
            --transition: all 0.25s ease;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-main);
            line-height: 1.3;
        }

        h1 {
            font-size: clamp(2.5rem, 5vw, 3.5rem);
        }

        h2 {
            font-size: clamp(1.75rem, 3vw, 2.2rem);
            margin-bottom: 1rem;
        }

        h3 {
            font-size: 1.25rem;
        }

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

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

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding-top: var(--spacing-section);
            padding-bottom: var(--spacing-section);
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-secondary);
        }

        .section-title {
            margin-bottom: 1.5rem;
            position: relative;
            display: inline-block;
        }

        .section-title:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -10px;
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 3rem;
            max-width: 800px;
        }

        /* Header / Nav */
        .navbar-custom {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(10, 14, 31, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 0.8rem 0;
        }

        .navbar-custom .navbar-brand {
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            letter-spacing: 0.02em;
        }

        .navbar-custom .navbar-brand .logo-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.8);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0e1f;
            font-size: 0.9rem;
        }

        .navbar-custom .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            transition: var(--transition);
            font-size: 0.95rem;
        }

        .navbar-custom .navbar-nav .nav-link:hover,
        .navbar-custom .navbar-nav .nav-link.active {
            color: var(--primary);
            background: rgba(56, 189, 248, 0.08);
        }

        .navbar-custom .search-group {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 30px;
            overflow: hidden;
            display: flex;
            align-items: center;
        }

        .navbar-custom .search-group .form-control {
            background: transparent;
            border: none;
            color: var(--text-main);
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
            box-shadow: none;
        }

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

        .navbar-custom .search-group .btn-search {
            background: transparent;
            border: none;
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            transition: var(--transition);
        }

        .navbar-custom .search-group .btn-search:hover {
            color: var(--primary);
        }

        .btn-outline-ghost {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: var(--text-main);
            border-radius: 30px;
            padding: 0.5rem 1.25rem;
            font-weight: 500;
            transition: var(--transition);
            font-size: 0.9rem;
        }

        .btn-outline-ghost:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.6);
            color: var(--text-main);
        }

        .btn-glow {
            background: var(--primary);
            border: none;
            color: #0a0e1f;
            font-weight: 700;
            border-radius: 30px;
            padding: 0.6rem 1.6rem;
            font-size: 0.95rem;
            transition: var(--transition);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
        }

        .btn-glow:hover {
            background: var(--primary-dark);
            color: #0a0e1f;
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        .btn-glow:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.5);
        }

        .btn-ghost-lg {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.35);
            color: var(--text-main);
            font-weight: 600;
            border-radius: 30px;
            padding: 0.7rem 1.8rem;
            font-size: 1rem;
            transition: var(--transition);
        }

        .btn-ghost-lg:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.7);
            color: var(--text-main);
            transform: translateY(-2px);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: transparent;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28230, 234, 242, 0.8%29' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Hero */
        .hero {
            min-height: 90vh;
            display: flex;
            align-items: center;
            position: relative;
            background: url('/assets/images/b643286316a58af0.webp') center / cover no-repeat;
            color: var(--text-main);
            padding: 6rem 0;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 31, 0.92) 0%, rgba(10, 14, 31, 0.65) 45%, rgba(10, 14, 31, 0.85) 100%);
            z-index: 1;
        }

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

        .hero-stage {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 20px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: var(--shadow-card);
            padding: 2rem;
            margin-top: 2rem;
        }

        .hero-value-left,
        .hero-value-right {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .value-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 12px;
            padding: 0.8rem 1rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
        }

        .value-item:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.3);
            color: var(--text-main);
        }

        .hero-badge {
            display: inline-block;
            background: rgba(56, 189, 248, 0.15);
            color: var(--primary);
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: 30px;
            padding: 0.35rem 1rem;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
        }

        .hero-title {
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }

        .hero-subtitle {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 700px;
            margin-bottom: 2rem;
        }

        .hero-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 800px;
            margin-bottom: 2rem;
        }

        .hero-buttons {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin-bottom: 2rem;
        }

        .hero-stats {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
            margin-top: 2rem;
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat .number {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            display: block;
            text-shadow: 0 0 12px rgba(56, 189, 248, 0.5);
        }

        .hero-stat .label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Cards */
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: var(--transition);
            padding: 1.5rem;
            height: 100%;
        }

        .glass-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(255, 255, 255, 0.35);
            transform: translateY(-4px);
            box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
        }

        .card-img {
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 1rem;
        }

        .card-img img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 10px;
            transition: var(--transition);
        }

        .glass-card:hover .card-img img {
            transform: scale(1.03);
        }

        .card-title {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
        }

        .card-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .badge-custom {
            background: rgba(139, 92, 246, 0.15);
            color: var(--accent);
            border: 1px solid rgba(139, 92, 246, 0.3);
            border-radius: 20px;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 500;
        }

        .badge-warm {
            background: rgba(245, 158, 11, 0.15);
            color: var(--warning);
            border: 1px solid rgba(245, 158, 11, 0.3);
            border-radius: 20px;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 500;
        }

        .badge-green {
            background: rgba(52, 211, 153, 0.15);
            color: var(--accent-green);
            border: 1px solid rgba(52, 211, 153, 0.3);
            border-radius: 20px;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 500;
        }

        /* Step bar */
        .step-item {
            text-align: center;
            padding: 1rem;
            position: relative;
        }

        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(56, 189, 248, 0.15);
            border: 2px solid var(--primary);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 0.8rem;
            transition: var(--transition);
        }

        .step-number:hover {
            background: var(--primary);
            color: #0a0e1f;
            box-shadow: var(--shadow-glow);
        }

        .step-title {
            font-weight: 600;
            margin-bottom: 0.3rem;
        }

        .step-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        /* Data numbers */
        .data-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            text-shadow: 0 0 18px rgba(56, 189, 248, 0.6);
            line-height: 1;
            margin-bottom: 0.5rem;
        }

        .data-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* Testimonials */
        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            padding: 1.5rem;
            height: 100%;
        }

        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #38bdf8, #8b5cf6);
            margin-right: 0.8rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
        }

        .testimonial-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* Trend bars */
        .trend-bar {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 20px;
            height: 30px;
            margin-bottom: 1rem;
            overflow: hidden;
            position: relative;
        }

        .trend-bar-fill {
            height: 100%;
            border-radius: 20px;
            background: linear-gradient(90deg, #38bdf8, #8b5cf6);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.5);
            transition: width 1s ease;
        }

        .trend-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 0.3rem;
            display: flex;
            justify-content: space-between;
        }

        /* CTA panel */
        .cta-panel {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 20px;
            backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            padding: 3rem 2rem;
            text-align: center;
        }

        /* Footer */
        .footer {
            background: #070b16;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 3rem 0 2rem;
            color: var(--text-secondary);
        }

        .footer .brand {
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .footer .copyright {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .back-to-top {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--text-secondary);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 30px;
            padding: 0.5rem 1.2rem;
            transition: var(--transition);
        }

        .back-to-top:hover {
            color: var(--primary);
            border-color: var(--primary);
        }

        /* Responsive */
        @media (max-width: 991px) {
            .hero {
                min-height: auto;
                padding: 4rem 0;
            }
            .hero-stage {
                margin-top: 1.5rem;
            }
            .section {
                padding-top: var(--spacing-section-mobile);
                padding-bottom: var(--spacing-section-mobile);
            }
        }

        @media (max-width: 767px) {
            .navbar-custom .navbar-brand {
                font-size: 1.1rem;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-buttons {
                flex-direction: column;
            }
            .btn-glow, .btn-ghost-lg {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                gap: 1rem;
            }
            .data-number {
                font-size: 2rem;
            }
            .glass-card {
                margin-bottom: 1rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-desc {
                font-size: 0.9rem;
            }
            .section-title:after {
                width: 40px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-main: #0a0e1f;
            --bg-secondary: #111a2e;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.12);
            --border-card: rgba(255, 255, 255, 0.16);
            --primary: #38bdf8;
            --primary-dark: #0ea5e9;
            --accent: #8b5cf6;
            --accent-green: #34d399;
            --warning: #f59e0b;
            --text-main: #e6eaf2;
            --text-secondary: #9aa3b5;
            --text-muted: #5f6a7f;
            --radius-card: 14px;
            --radius-btn: 10px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 18px rgba(56, 189, 248, 0.6);
            --font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --spacing-section: 90px;
            --spacing-section-mobile: 56px;
            --transition: all 0.25s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

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

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

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

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding-top: var(--spacing-section);
            padding-bottom: var(--spacing-section);
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-secondary);
        }

        .section-title {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 1.5rem;
            position: relative;
            display: inline-block;
            letter-spacing: -0.01em;
        }

        .section-title:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -10px;
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 3rem;
            max-width: 800px;
        }

        /* Header / Nav */
        .navbar-custom {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(10, 14, 31, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 0.8rem 0;
        }

        .navbar-custom .navbar-brand {
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            letter-spacing: 0.02em;
        }

        .navbar-custom .navbar-brand .logo-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.8);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0e1f;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .navbar-custom .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            transition: var(--transition);
            font-size: 0.95rem;
        }

        .navbar-custom .navbar-nav .nav-link:hover,
        .navbar-custom .navbar-nav .nav-link.active {
            color: var(--primary);
            background: rgba(56, 189, 248, 0.08);
        }

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

        .navbar-custom .search-group {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 30px;
            overflow: hidden;
            display: flex;
            align-items: center;
        }

        .navbar-custom .search-group .form-control {
            background: transparent;
            border: none;
            color: var(--text-main);
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
            box-shadow: none;
        }

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

        .navbar-custom .search-group .form-control:focus {
            outline: none;
            box-shadow: none;
            background: transparent;
        }

        .navbar-custom .search-group .btn-search {
            background: transparent;
            border: none;
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            transition: var(--transition);
        }

        .navbar-custom .search-group .btn-search:hover {
            color: var(--primary);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 0.4rem 0.7rem;
            border-radius: 8px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.4);
            outline: none;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(230,234,242,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .btn-outline-ghost {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: var(--text-main);
            border-radius: 30px;
            padding: 0.5rem 1.25rem;
            font-weight: 500;
            transition: var(--transition);
            font-size: 0.9rem;
        }

        .btn-outline-ghost:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.6);
            color: var(--text-main);
        }

        .btn-glow {
            background: var(--primary);
            border: none;
            color: #0a0e1f;
            font-weight: 700;
            border-radius: 30px;
            padding: 0.6rem 1.6rem;
            font-size: 0.95rem;
            transition: var(--transition);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
            cursor: pointer;
        }

        .btn-glow:hover {
            background: var(--primary-dark);
            color: #0a0e1f;
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        .btn-glow:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.4);
        }

        /* Category Header */
        .category-header {
            background: linear-gradient(165deg, #0a0e1f 0%, #111a2e 45%, #152238 100%);
            padding-top: 90px;
            padding-bottom: 70px;
            position: relative;
            overflow: hidden;
        }

        .category-header:before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(56, 189, 248, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-header:after {
            content: '';
            position: absolute;
            bottom: -140px;
            left: -60px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-header h1 {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
            position: relative;
            z-index: 1;
        }

        .category-header .cat-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 750px;
            margin-bottom: 0;
            position: relative;
            z-index: 1;
        }

        .category-header .cat-meta {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
            margin-top: 1.5rem;
            position: relative;
            z-index: 1;
        }

        .category-header .cat-meta span {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .category-header .cat-meta i {
            color: var(--primary);
        }

        /* Card Grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }

        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: 0 14px 34px rgba(0, 0, 0, 0.45), 0 0 20px rgba(56, 189, 248, 0.15);
            border-color: rgba(56, 189, 248, 0.4);
        }

        .content-card .card-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
            background: var(--bg-secondary);
        }

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

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

        .content-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(10, 14, 31, 0.8);
            backdrop-filter: blur(8px);
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            border: 1px solid rgba(56, 189, 248, 0.3);
            z-index: 2;
        }

        .content-card .card-body {
            padding: 1.1rem 1.25rem 1.3rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .content-card .card-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 0.5rem;
            line-height: 1.4;
            transition: var(--transition);
        }

        .content-card:hover .card-title {
            color: var(--primary);
        }

        .content-card .card-desc {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 1rem;
            flex-grow: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .content-card .card-foot {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .content-card .card-foot .region {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        .content-card .card-foot .region i {
            color: var(--accent);
            font-size: 0.75rem;
        }

        /* Tag Filter Bar */
        .tag-filter {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-bottom: 2rem;
        }

        .tag-filter .btn-tag {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.14);
            color: var(--text-secondary);
            border-radius: 20px;
            padding: 0.45rem 1.3rem;
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }

        .tag-filter .btn-tag:hover {
            background: rgba(56, 189, 248, 0.12);
            border-color: rgba(56, 189, 248, 0.4);
            color: var(--primary);
        }

        .tag-filter .btn-tag.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #0a0e1f;
            font-weight: 700;
            box-shadow: 0 0 14px rgba(56, 189, 248, 0.4);
        }

        .tag-filter .btn-tag:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.35);
        }

        /* Data Metrics */
        .metric-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
        }

        .metric-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            padding: 1.5rem 1.25rem;
            text-align: center;
            transition: var(--transition);
            backdrop-filter: blur(12px);
        }

        .metric-item:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.35);
        }

        .metric-item .metric-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            text-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
            line-height: 1.2;
            margin-bottom: 0.4rem;
        }

        .metric-item .metric-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        /* Recommend Cards */
        .reco-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
            gap: 20px;
        }

        .reco-card {
            display: flex;
            gap: 14px;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            padding: 1rem 1.2rem;
            transition: var(--transition);
            backdrop-filter: blur(12px);
            align-items: center;
        }

        .reco-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.35);
            transform: translateY(-2px);
        }

        .reco-card .reco-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(56, 189, 248, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .reco-card .reco-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 0.2rem;
        }

        .reco-card .reco-info p {
            font-size: 0.8rem;
            color: var(--text-secondary);
            margin: 0;
        }

        /* CTA Banner */
        .cta-banner {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.12) 0%, rgba(139, 92, 246, 0.12) 50%, rgba(52, 211, 153, 0.08) 100%);
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: 20px;
            padding: 3rem 2.5rem;
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .cta-banner:before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(56, 189, 248, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-banner h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.8rem;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
            margin-bottom: 1.5rem;
            position: relative;
            z-index: 1;
        }

        .cta-banner .btn-glow {
            position: relative;
            z-index: 1;
            font-size: 1rem;
            padding: 0.75rem 2rem;
        }

        /* FAQ */
        .accordion-custom .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card) !important;
            margin-bottom: 0.8rem;
            overflow: hidden;
            transition: var(--transition);
        }

        .accordion-custom .accordion-item:hover {
            border-color: rgba(56, 189, 248, 0.3);
        }

        .accordion-custom .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 1.1rem 1.3rem;
            border: none;
            box-shadow: none;
            transition: var(--transition);
            position: relative;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(56, 189, 248, 0.08);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.3);
            outline: none;
        }

        .accordion-custom .accordion-button:after {
            filter: invert(1) brightness(2);
        }

        .accordion-custom .accordion-body {
            color: var(--text-secondary);
            font-size: 0.9rem;
            padding: 1rem 1.3rem 1.3rem;
            line-height: 1.6;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* Bottom Nav */
        .bottom-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            align-items: center;
            justify-content: space-between;
            padding: 1.5rem 0 0.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .bottom-nav .bn-links {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
        }

        .bottom-nav .bn-links a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .bottom-nav .bn-links a:hover {
            color: var(--primary);
        }

        /* Footer */
        .footer {
            background: #0d1326;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 2.5rem 0 1.5rem;
            margin-top: var(--spacing-section);
        }

        .footer .brand {
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .footer .copyright {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: var(--transition);
        }

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

        .footer .back-to-top {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-weight: 500;
        }

        /* Responsive */
        @media (max-width: 991px) {
            .navbar-custom .navbar-collapse {
                padding: 1rem 0 0.5rem;
            }
            .navbar-custom .navbar-nav {
                margin-bottom: 0.5rem;
            }
            .navbar-custom .search-group {
                margin: 0.5rem 0;
                width: 100%;
            }
            .category-header h1 {
                font-size: 2.2rem;
            }
            .card-grid {
                grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
                gap: 18px;
            }
            .section {
                padding-top: 70px;
                padding-bottom: 70px;
            }
        }

        @media (max-width: 767px) {
            .category-header h1 {
                font-size: 1.8rem;
            }
            .category-header .cat-desc {
                font-size: 1rem;
            }
            .category-header .cat-meta {
                gap: 1rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .reco-row {
                grid-template-columns: 1fr;
            }
            .metric-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .metric-item .metric-num {
                font-size: 1.7rem;
            }
            .cta-banner {
                padding: 2rem 1.5rem;
            }
            .cta-banner h2 {
                font-size: 1.4rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section {
                padding-top: var(--spacing-section-mobile);
                padding-bottom: var(--spacing-section-mobile);
            }
            .bottom-nav {
                flex-direction: column;
                gap: 1rem;
                align-items: flex-start;
            }
            .bottom-nav .bn-links {
                gap: 1.2rem;
            }
            .footer {
                padding: 2rem 0 1rem;
                margin-top: var(--spacing-section-mobile);
            }
            .btn-glow {
                font-size: 0.9rem;
                padding: 0.55rem 1.3rem;
            }
            .tag-filter {
                gap: 0.4rem;
            }
            .tag-filter .btn-tag {
                padding: 0.35rem 0.9rem;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-header h1 {
                font-size: 1.55rem;
            }
            .metric-row {
                grid-template-columns: 1fr;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .reco-row {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .cta-banner h2 {
                font-size: 1.25rem;
            }
            .footer .row {
                text-align: center;
            }
            .footer .text-md-end {
                text-align: center !important;
            }
        }

        /* Focus visible */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Btn more */
        .btn-more {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.35);
            color: var(--primary);
            border-radius: 30px;
            padding: 0.55rem 1.5rem;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-more:hover {
            background: rgba(56, 189, 248, 0.2);
            border-color: rgba(56, 189, 248, 0.6);
            color: var(--primary-dark);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.25);
        }