/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(18, 26, 46, 0.75);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-hover: #3D7BFF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8494A7;
            --border-glow: rgba(0, 82, 255, 0.45);
            --border-cyan: rgba(0, 240, 255, 0.35);
            --danger: #FF3B6B;
            --success: #00D68F;
            --warning: #FFB800;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-card: 0 10px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 24px rgba(0, 82, 255, 0.35);
            --font-main: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-main);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--accent-cyan); text-decoration: none; transition: color .25s ease; }
        a:hover { color: #66F7FF; }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
        .btn {
            border-radius: 12px;
            padding: 12px 28px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all .3s ease;
            border: none;
        }
        .btn:focus { outline: 3px solid rgba(0, 240, 255, 0.4); outline-offset: 2px; }
        .btn-primary-custom {
            background: linear-gradient(135deg, var(--accent-blue), #1A6BFF);
            color: #fff;
            box-shadow: 0 6px 20px rgba(0, 82, 255, 0.45);
        }
        .btn-primary-custom:hover {
            background: linear-gradient(135deg, var(--accent-hover), #2D7FFF);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(0, 82, 255, 0.6);
        }
        .btn-outline-cyan {
            border: 1.5px solid var(--accent-cyan);
            color: var(--accent-cyan);
            background: transparent;
        }
        .btn-outline-cyan:hover {
            background: rgba(0, 240, 255, 0.1);
            color: #66F7FF;
            border-color: #66F7FF;
            transform: translateY(-2px);
        }
        .btn-danger-glow {
            background: linear-gradient(135deg, #FF3B6B, #C81E4E);
            color: #fff;
            box-shadow: 0 6px 20px rgba(255, 59, 107, 0.4);
        }
        .btn-danger-glow:hover {
            background: linear-gradient(135deg, #FF5C84, #E0285A);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(255, 59, 107, 0.55);
        }
        /* Header */
        .site-header {
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: all .3s ease;
        }
        .navbar-custom {
            padding: 14px 0;
        }
        .navbar-brand-custom {
            font-weight: 800;
            font-size: 1.15rem;
            color: #fff;
            letter-spacing: 0.2px;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .navbar-brand-custom .logo-icon {
            width: 36px; height: 36px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 10px;
            display: flex; align-items: center; justify-content: center;
            font-weight: 900;
            font-size: 1rem;
            color: #fff;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
        }
        .navbar-brand-custom:hover { color: #fff; }
        .nav-link-custom {
            color: var(--text-secondary);
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: all .25s ease;
            font-size: 0.95rem;
        }
        .nav-link-custom:hover { color: #fff; background: rgba(0, 82, 255, 0.2); }
        .nav-link-custom.active { color: var(--accent-cyan); background: rgba(0, 240, 255, 0.08); }
        .navbar-nav { gap: 4px; }
        .btn-login-nav {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            padding: 8px 20px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all .25s ease;
        }
        .btn-login-nav:hover { border-color: #fff; color: #fff; background: rgba(255,255,255,0.08); }
        .btn-signup-nav {
            background: linear-gradient(135deg, var(--accent-blue), #1A6BFF);
            color: #fff;
            padding: 9px 24px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 14px rgba(0, 82, 255, 0.45);
            transition: all .25s ease;
            border: none;
        }
        .btn-signup-nav:hover {
            background: linear-gradient(135deg, var(--accent-hover), #2D7FFF);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 22px rgba(0, 82, 255, 0.6);
        }
        .navbar-toggler {
            border: 1px solid rgba(255,255,255,0.25);
            color: #fff;
            padding: 6px 10px;
            border-radius: 8px;
        }
        .navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.3); }
        .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(255, 255, 255, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        /* Hero */
        .hero-section {
            background: linear-gradient(180deg, rgba(8,9,15,0.6) 0%, rgba(13,17,30,0.9) 100%),
                        url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            padding: 72px 0 64px;
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            position: relative;
            overflow: hidden;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0; right: 0;
            height: 120px;
            background: linear-gradient(0deg, var(--bg-primary) 0%, transparent 100%);
            pointer-events: none;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.35);
            color: var(--accent-cyan);
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.4px;
        }
        .hero-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            margin-top: 20px;
            letter-spacing: -0.5px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), #66F7FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-top: 20px;
            max-width: 680px;
            line-height: 1.7;
        }
        .hero-cta-row {
            margin-top: 32px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .hero-stats {
            margin-top: 40px;
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-value {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        /* Section base */
        .section-block {
            padding: 64px 0;
            position: relative;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 10px;
        }
        .section-title {
            font-size: 1.9rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            letter-spacing: -0.3px;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-top: 12px;
            max-width: 720px;
            line-height: 1.65;
        }
        /* Cards */
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(0, 82, 255, 0.3);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all .35s ease;
            height: 100%;
        }
        .glass-card:hover {
            border-color: rgba(0, 240, 255, 0.55);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.15);
            transform: translateY(-4px);
        }
        .icon-box {
            width: 52px; height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(0,82,255,0.25), rgba(0,240,255,0.15));
            border: 1px solid rgba(0, 240, 255, 0.35);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            margin-bottom: 18px;
        }
        .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .card-text {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        /* List items */
        .list-check {
            list-style: none;
            padding: 0;
        }
        .list-check li {
            padding-left: 30px;
            position: relative;
            margin-bottom: 10px;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .list-check li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--success);
            font-size: 0.85rem;
        }
        /* Data panel */
        .data-panel {
            background: rgba(13, 17, 30, 0.85);
            border: 1px solid rgba(0, 82, 255, 0.25);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-card);
        }
        .data-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
        }
        .data-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        /* News list */
        .news-list-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            transition: all .25s ease;
        }
        .news-list-item:hover { background: rgba(0, 82, 255, 0.08); padding-left: 8px; border-radius: 8px; }
        .news-date {
            min-width: 70px;
            font-size: 0.8rem;
            color: var(--text-muted);
            font-weight: 600;
        }
        .news-link {
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            transition: color .25s ease;
        }
        .news-link:hover { color: var(--accent-cyan); }
        /* Steps */
        .step-item {
            display: flex;
            gap: 18px;
            margin-bottom: 28px;
        }
        .step-number {
            min-width: 44px; height: 44px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
        }
        .step-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .step-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        /* FAQ */
        .accordion-custom .accordion-item {
            background: rgba(13, 17, 30, 0.7);
            border: 1px solid rgba(0, 82, 255, 0.25);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-custom .accordion-button {
            background: transparent;
            color: #fff;
            font-weight: 600;
            padding: 18px 20px;
            box-shadow: none;
            font-size: 0.98rem;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 82, 255, 0.15);
            color: var(--accent-cyan);
        }
        .accordion-custom .accordion-button::after {
            filter: invert(1) brightness(1.5);
        }
        .accordion-custom .accordion-body {
            background: rgba(8, 9, 15, 0.6);
            color: var(--text-secondary);
            font-size: 0.9rem;
            padding: 18px 20px;
            line-height: 1.65;
        }
        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 82, 255, 0.25);
            padding: 48px 0 24px;
            color: var(--text-secondary);
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color .25s ease;
            display: inline-block;
            margin-bottom: 8px;
        }
        .footer-links a:hover { color: var(--accent-cyan); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            margin-top: 32px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px; height: 34px;
            background: var(--danger);
            color: #fff;
            border-radius: 50%;
            font-weight: 800;
            font-size: 0.75rem;
            margin-right: 8px;
        }
        /* FAB */
        .fab-cyber {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            width: 52px; height: 52px;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            cursor: pointer;
            transition: all .3s ease;
            opacity: 0.65;
            animation: fabBreath 3s ease-in-out infinite;
        }
        .fab-cyber:hover {
            opacity: 1;
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.7);
            transform: scale(1.08);
            color: #fff;
        }
        .fab-cyber .badge-dot {
            position: absolute;
            top: -2px; right: -2px;
            width: 14px; height: 14px;
            background: var(--danger);
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: blinkDot 1.2s ease-in-out infinite;
        }
        @keyframes fabBreath {
            0%, 100% { opacity: 0.6; }
            50% { opacity: 0.85; }
        }
        @keyframes blinkDot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        /* Responsive */
        @media (max-width: 991px) {
            .hero-title { font-size: 2rem; }
            .hero-stats { gap: 20px; }
            .navbar-collapse {
                background: rgba(8, 9, 15, 0.98);
                border-radius: 12px;
                padding: 16px;
                margin-top: 10px;
                border: 1px solid rgba(0, 82, 255, 0.3);
            }
            .navbar-nav { gap: 2px; }
            .nav-link-custom { padding: 10px 12px !important; }
        }
        @media (max-width: 768px) {
            .hero-section { padding: 48px 0 48px; }
            .hero-title { font-size: 1.6rem; }
            .hero-desc { font-size: 0.95rem; }
            .section-block { padding: 48px 0; }
            .section-title { font-size: 1.5rem; }
            .hero-stats { gap: 16px; flex-wrap: wrap; }
            .hero-stat-value { font-size: 1.4rem; }
        }
        @media (max-width: 520px) {
            .hero-title { font-size: 1.35rem; }
            .btn { padding: 10px 20px; font-size: 0.9rem; }
            .glass-card { padding: 20px 16px; }
            .news-list-item { flex-direction: column; align-items: flex-start; gap: 4px; }
            .news-date { min-width: auto; }
            .hero-stats { gap: 12px; }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --card-bg: rgba(13, 17, 30, 0.75);
            --card-border: rgba(0, 82, 255, 0.25);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #7A8BA3;
            --glass-bg: rgba(13, 17, 30, 0.65);
            --glass-border: rgba(255, 255, 255, 0.08);
            --shadow-glow: 0 0 30px rgba(0, 82, 255, 0.35);
            --shadow-cyan: 0 0 25px rgba(0, 240, 255, 0.25);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Be Vietnam Pro', sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-family);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            border: none;
            outline: none;
            cursor: pointer;
            font-family: var(--font-family);
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }
        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            transition: var(--transition);
        }
        .navbar-custom {
            padding: 14px 0;
            background: transparent;
        }
        .navbar-brand-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-white) !important;
            letter-spacing: -0.02em;
        }
        .navbar-brand-custom:hover {
            color: var(--accent-cyan) !important;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            box-shadow: var(--shadow-glow);
        }
        .nav-link-custom {
            color: var(--text-silver) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: var(--transition);
            position: relative;
        }
        .nav-link-custom:hover {
            color: var(--accent-cyan) !important;
            background: rgba(0, 82, 255, 0.1);
        }
        .nav-link-custom.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 82, 255, 0.15);
        }
        .nav-link-custom.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-cyan);
        }
        .btn-login-nav {
            background: transparent;
            color: var(--text-silver);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 8px 18px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: var(--transition);
        }
        .btn-login-nav:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.05);
        }
        .btn-signup-nav {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 8px 20px;
            border-radius: 8px;
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
        }
        .btn-signup-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 82, 255, 0.5);
        }
        .navbar-toggler {
            border-color: rgba(255, 255, 255, 0.2);
            padding: 6px 10px;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            border-color: var(--accent-cyan);
        }
        .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%280, 240, 255, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        /* Page Banner */
        .page-banner {
            padding: 140px 0 60px;
            background: linear-gradient(180deg, rgba(8, 9, 15, 0.95) 0%, rgba(13, 17, 30, 0.9) 50%, var(--primary-bg) 100%);
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 70% 20%, rgba(0, 82, 255, 0.15) 0%, transparent 60%);
            pointer-events: none;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
        }
        .breadcrumb-custom a {
            color: var(--text-muted);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-custom i {
            font-size: 0.7rem;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
            background: linear-gradient(135deg, #fff 30%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner .lead {
            font-size: 1.15rem;
            color: var(--text-silver);
            max-width: 720px;
            position: relative;
            z-index: 2;
            line-height: 1.7;
        }
        /* Hero Download Section */
        .hero-download {
            padding: 20px 0 70px;
            position: relative;
        }
        .hero-download-inner {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            position: relative;
            overflow: hidden;
        }
        .hero-download-inner::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-download-left h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-white);
            letter-spacing: -0.02em;
        }
        .hero-download-left p {
            color: var(--text-silver);
            font-size: 1.05rem;
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .hero-download-left .features-list {
            list-style: none;
            padding: 0;
            margin-bottom: 28px;
        }
        .hero-download-left .features-list li {
            padding: 8px 0;
            color: var(--text-silver);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .hero-download-left .features-list li i {
            color: var(--accent-cyan);
            font-size: 0.9rem;
        }
        .btn-download-main {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            padding: 14px 32px;
            border-radius: 12px;
            box-shadow: var(--shadow-glow);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .btn-download-main:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 82, 255, 0.55);
            color: #fff;
        }
        .btn-download-secondary {
            background: transparent;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 14px 24px;
            border-radius: 12px;
            border: 1px solid rgba(0, 240, 255, 0.3);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .btn-download-secondary:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .hero-download-right {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-download-right img {
            border-radius: var(--radius-md);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(0, 82, 255, 0.3);
            max-height: 400px;
            object-fit: cover;
        }
        /* Section Styles */
        .section-padding {
            padding: 70px 0;
        }
        .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            color: var(--text-white);
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        /* Stats Section */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover {
            border-color: rgba(0, 82, 255, 0.4);
            box-shadow: var(--shadow-glow);
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(135deg, #fff, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 6px;
        }
        .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            font-weight: 500;
        }
        /* Feature Cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 3px;
            height: 0;
            background: linear-gradient(180deg, var(--accent-blue), var(--accent-cyan));
            transition: var(--transition);
        }
        .feature-card:hover {
            border-color: rgba(0, 82, 255, 0.35);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .feature-card:hover::before {
            height: 100%;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.15));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-white);
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        /* Steps Section */
        .steps-wrapper {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
        }
        .step-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-number {
            width: 48px;
            height: 48px;
            min-width: 48px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .step-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 6px;
        }
        .step-content p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        /* Comparison Section */
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        .comparison-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
        }
        .comparison-card.advantage {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-cyan);
        }
        .comparison-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-white);
        }
        .comparison-card ul {
            list-style: none;
            padding: 0;
        }
        .comparison-card ul li {
            padding: 10px 0;
            color: var(--text-silver);
            font-size: 0.95rem;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.6;
        }
        .comparison-card ul li i.fa-check-circle {
            color: var(--accent-cyan);
        }
        .comparison-card ul li i.fa-times-circle {
            color: #FF5252;
        }
        /* FAQ Section */
        .accordion-custom .accordion-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-custom .accordion-button {
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 20px;
            box-shadow: none;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 82, 255, 0.1);
            color: var(--accent-cyan);
            box-shadow: none;
        }
        .accordion-custom .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300F0FF'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }
        .accordion-custom .accordion-body {
            color: var(--text-silver);
            font-size: 0.92rem;
            line-height: 1.7;
            padding: 16px 20px;
        }
        /* CTA Section */
        .cta-section {
            padding: 70px 0;
            position: relative;
        }
        .cta-inner {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.1));
            border: 1px solid rgba(0, 82, 255, 0.3);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-inner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-inner h2 {
            font-size: 2rem;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }
        .cta-inner p {
            color: var(--text-silver);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        /* Footer */
        .site-footer {
            background: #06070D;
            border-top: 1px solid rgba(0, 82, 255, 0.2);
            padding: 60px 0 30px;
            color: var(--text-silver);
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-white);
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 2;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
        }
        .badge-18 {
            width: 36px;
            height: 36px;
            background: #FF5252;
            color: #fff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.75rem;
            margin-right: 10px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            margin-top: 40px;
            font-size: 0.85rem;
            color: var(--text-muted);
            text-align: center;
        }
        /* FAB */
        .fab-floating {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 56px;
            height: 56px;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan)) 1;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            opacity: 0.7;
            animation: fabPulse 3s ease-in-out infinite;
        }
        .fab-floating:hover {
            opacity: 1;
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
            transform: scale(1.1);
            color: #fff;
            border-image: linear-gradient(135deg, #FF007F, var(--accent-cyan)) 1;
        }
        @keyframes fabPulse {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .page-banner h1 {
                font-size: 2rem;
            }
            .hero-download-inner {
                padding: 32px 20px;
            }
            .hero-download-left h2 {
                font-size: 1.4rem;
            }
            .comparison-grid {
                grid-template-columns: 1fr;
            }
            .steps-wrapper {
                padding: 32px 20px;
            }
            .cta-inner {
                padding: 36px 20px;
            }
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .btn-download-main {
                font-size: 0.9rem;
                padding: 12px 20px;
                width: 100%;
                justify-content: center;
            }
            .btn-download-secondary {
                width: 100%;
                justify-content: center;
                font-size: 0.9rem;
            }
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .step-item {
                flex-direction: column;
                gap: 10px;
            }
        }

/* roulang page: article */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.72);
            --bg-glass: rgba(8, 9, 15, 0.55);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #7C8BA0;
            --border-glass: rgba(0, 240, 255, 0.22);
            --border-soft: rgba(255, 255, 255, 0.08);
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-glow: 0 0 24px rgba(0, 240, 255, 0.18);
            --shadow-card: 0 18px 42px rgba(0, 0, 0, 0.48);
            --font-main: 'Be Vietnam Pro', sans-serif;
            --transition: all 0.25s ease;
        }

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

        body {
            font-family: var(--font-main);
            background: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.65;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(circle at 15% 20%, rgba(0, 82, 255, 0.08), transparent 40%),
                              radial-gradient(circle at 85% 75%, rgba(0, 240, 255, 0.05), transparent 40%);
        }

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

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

        a:hover {
            color: var(--accent-cyan);
        }

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

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

        /* NAVBAR */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-soft);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.32);
        }

        .navbar-custom {
            padding: 14px 0;
        }

        .navbar-brand-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .navbar-brand-custom:hover {
            color: var(--accent-cyan);
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: var(--shadow-glow);
        }

        .nav-link-custom {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.92rem;
            padding: 8px 14px !important;
            border-radius: 10px;
            transition: var(--transition);
            letter-spacing: 0.01em;
        }

        .nav-link-custom:hover,
        .nav-link-custom:focus {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.07);
        }

        .nav-link-custom.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
        }

        .btn-login-nav {
            background: transparent;
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
            padding: 8px 18px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-login-nav:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
        }

        .btn-signup-nav {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 8px 20px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-signup-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.4);
            color: #fff;
        }

        /* ARTICLE DETAIL */
        .article-hero {
            padding: 60px 0 40px;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.06) 0%, transparent 100%);
            border-bottom: 1px solid var(--border-soft);
            position: relative;
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -100px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.12), transparent 70%);
            pointer-events: none;
        }

        .breadcrumb-article {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 22px;
            flex-wrap: wrap;
        }

        .breadcrumb-article a {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .breadcrumb-article a:hover {
            text-decoration: underline;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 16px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }

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

        .badge-category {
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-cyan);
            padding: 6px 14px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
            border: 1px solid rgba(0, 240, 255, 0.25);
            letter-spacing: 0.02em;
        }

        .article-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            max-width: 850px;
            margin-bottom: 14px;
        }

        .article-hero .lead-summary {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }

        .article-body-wrapper {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            align-items: start;
            padding: 48px 0 70px;
        }

        .article-content {
            max-width: 100%;
            font-size: 1.02rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 36px;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 28px;
            margin-bottom: 12px;
        }

        .article-content p {
            margin-bottom: 18px;
        }

        .article-content ul,
        .article-content ol {
            padding-left: 24px;
            margin-bottom: 20px;
        }

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

        .article-content img {
            border-radius: var(--radius-md);
            margin: 28px 0;
            box-shadow: var(--shadow-card);
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent-cyan);
            background: rgba(0, 240, 255, 0.05);
            padding: 20px 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 28px 0;
            color: var(--text-primary);
            font-style: italic;
        }

        .article-sidebar {
            position: sticky;
            top: 100px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            padding: 24px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow-card);
        }

        .sidebar-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h4 i {
            color: var(--accent-cyan);
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.25), rgba(0, 240, 255, 0.12));
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-glow);
        }

        .cta-box h3 {
            font-size: 1.2rem;
            font-weight: 800;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .cta-box p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 18px;
        }

        .btn-primary-cta {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 12px 28px;
            border-radius: 12px;
            font-weight: 700;
            font-size: 0.95rem;
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
            display: inline-block;
            width: 100%;
            text-align: center;
        }

        .btn-primary-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 38px rgba(0, 240, 255, 0.45);
            color: #fff;
        }

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

        .related-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-soft);
            font-size: 0.92rem;
        }

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

        .related-list a {
            color: var(--text-secondary);
            font-weight: 500;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .related-list a i {
            color: var(--accent-cyan);
            font-size: 0.7rem;
            margin-top: 5px;
        }

        .related-list a:hover {
            color: var(--accent-cyan);
        }

        .trust-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .trust-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .trust-list i {
            color: var(--accent-cyan);
            width: 20px;
            text-align: center;
        }

        .not-found-box {
            text-align: center;
            padding: 70px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
        }

        .not-found-box i {
            font-size: 3rem;
            color: var(--accent-cyan);
            margin-bottom: 20px;
            display: block;
        }

        .not-found-box h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .btn-back-home {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 12px 30px;
            border-radius: 12px;
            font-weight: 700;
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
            display: inline-block;
        }

        .btn-back-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 38px rgba(0, 240, 255, 0.45);
            color: #fff;
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 18px;
            bottom: 100px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.7), rgba(8, 9, 15, 0.7)), linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            cursor: pointer;
            transition: var(--transition);
            opacity: 0.7;
            animation: fabBreathe 3s ease-in-out infinite;
        }

        .fab-support i {
            font-size: 1.5rem;
            color: var(--accent-cyan);
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.7);
            animation: none;
        }

        .fab-support:active {
            transform: scale(0.95);
        }

        .fab-support .notification-dot {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid #08090F;
            animation: blinkDot 1.6s ease-in-out infinite;
        }

        @keyframes fabBreathe {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

        @keyframes blinkDot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* FOOTER */
        .site-footer {
            background: rgba(8, 9, 15, 0.9);
            border-top: 1px solid var(--border-soft);
            padding: 50px 0 28px;
            margin-top: auto;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-primary);
        }

        .footer-links a,
        .footer-links span {
            display: inline-block;
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 2.1;
            transition: var(--transition);
        }

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

        .badge-18 {
            background: #D32F2F;
            color: #fff;
            padding: 4px 8px;
            border-radius: 6px;
            font-weight: 700;
            font-size: 0.7rem;
            display: inline-block;
            line-height: 1.2;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 20px;
            margin-top: 36px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* RESPONSIVE */
        @media (max-width: 1024px) {
            .article-body-wrapper {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 768px) {
            .article-hero h1 {
                font-size: 1.8rem;
            }

            .article-hero .lead-summary {
                font-size: 1rem;
            }

            .navbar-brand-custom span:last-child {
                font-size: 0.95rem;
            }

            .btn-login-nav,
            .btn-signup-nav {
                padding: 7px 14px;
                font-size: 0.82rem;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .fab-support {
                left: 12px;
                bottom: 90px;
                width: 48px;
                height: 48px;
            }

            .fab-support i {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.5rem;
            }

            .article-body-wrapper {
                padding: 32px 0 50px;
            }

            .article-content {
                font-size: 0.95rem;
            }

            .article-meta {
                gap: 10px;
                font-size: 0.8rem;
            }

            .navbar-brand-custom span:last-child {
                font-size: 0.85rem;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }

            .btn-login-nav,
            .btn-signup-nav {
                padding: 6px 10px;
                font-size: 0.75rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --card-bg: rgba(13, 17, 30, 0.85);
            --glass-bg: rgba(13, 17, 30, 0.65);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #64748B;
            --border-glass: rgba(0, 240, 255, 0.15);
            --border-electric: rgba(0, 82, 255, 0.4);
            --shadow-neon: 0 0 20px rgba(0, 240, 255, 0.15);
            --shadow-blue: 0 0 30px rgba(0, 82, 255, 0.25);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-primary: 'Inter', 'Segoe UI', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: var(--font-primary);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        
        a:hover {
            color: var(--accent-cyan);
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        button {
            border: none;
            cursor: pointer;
            font-family: inherit;
        }
        
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        
        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-glass);
            transition: all var(--transition-base);
        }
        
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        
        .navbar-custom {
            padding-top: 14px;
            padding-bottom: 14px;
        }
        
        .navbar-brand-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        
        .navbar-brand-custom:hover {
            color: var(--accent-cyan);
        }
        
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--text-white);
            box-shadow: var(--shadow-neon);
        }
        
        .nav-link-custom {
            color: var(--text-silver);
            font-size: 0.9rem;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 20px;
            transition: all var(--transition-fast);
            position: relative;
        }
        
        .nav-link-custom:hover {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.08);
        }
        
        .nav-link-custom.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.12);
            font-weight: 600;
        }
        
        .btn-login-nav {
            background: transparent;
            color: var(--text-silver);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 20px;
            transition: all var(--transition-fast);
        }
        
        .btn-login-nav:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.1);
        }
        
        .btn-signup-nav {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: var(--text-white);
            font-size: 0.85rem;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: 24px;
            box-shadow: var(--shadow-neon);
            transition: all var(--transition-base);
        }
        
        .btn-signup-nav:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-blue);
            color: var(--text-white);
        }
        
        .navbar-toggler {
            border: 1px solid var(--border-glass);
            padding: 8px 10px;
        }
        
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2);
            outline: none;
        }
        
        /* ============ HERO ============ */
        .hero-android {
            padding-top: 140px;
            padding-bottom: 80px;
            background: radial-gradient(ellipse at 70% 30%, rgba(0, 82, 255, 0.15) 0%, transparent 60%),
                        radial-gradient(ellipse at 20% 80%, rgba(0, 240, 255, 0.08) 0%, transparent 50%),
                        var(--primary-bg);
            position: relative;
            overflow: hidden;
        }
        
        .hero-android::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        
        .hero-android .container {
            position: relative;
            z-index: 1;
        }
        
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-glass);
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }
        
        .hero-title {
            font-size: clamp(2rem, 5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-silver);
            max-width: 560px;
            line-height: 1.7;
            margin-bottom: 32px;
        }
        
        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: 28px;
            box-shadow: var(--shadow-neon);
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        
        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-blue);
            color: var(--text-white);
        }
        
        .btn-outline-glow {
            background: transparent;
            color: var(--accent-cyan);
            font-size: 0.95rem;
            font-weight: 600;
            padding: 13px 28px;
            border-radius: 28px;
            border: 1px solid var(--border-glass);
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        
        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-cyan);
            color: var(--text-white);
        }
        
        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        
        .hero-stat-value {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.01em;
        }
        
        .hero-stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 2px;
        }
        
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        
        .hero-visual-wrapper {
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-neon);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            max-width: 420px;
            width: 100%;
        }
        
        .hero-visual-wrapper img {
            border-radius: var(--radius-md);
            width: 100%;
            object-fit: cover;
        }
        
        .hero-phone-badge {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 20px;
            padding: 14px 18px;
            background: rgba(0, 82, 255, 0.1);
            border: 1px solid var(--border-electric);
            border-radius: var(--radius-sm);
        }
        
        .hero-phone-badge i {
            font-size: 1.5rem;
            color: var(--accent-cyan);
        }
        
        .hero-phone-badge span {
            font-size: 0.85rem;
            color: var(--text-silver);
        }
        
        /* ============ SECTION GENERAL ============ */
        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        
        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        
        .section-title {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        
        .section-desc {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 600px;
        }
        
        /* ============ COMPARISON HERO SECTION ============ */
        .comparison-section {
            background: var(--secondary-bg);
            padding-top: 70px;
            padding-bottom: 70px;
        }
        
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 40px;
        }
        
        .comparison-card {
            background: var(--card-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-base);
        }
        
        .comparison-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--shadow-neon);
        }
        
        .comparison-card.recommended {
            border-color: var(--accent-cyan);
            background: linear-gradient(145deg, rgba(0, 240, 255, 0.08), var(--card-bg));
            box-shadow: var(--shadow-neon);
            position: relative;
        }
        
        .comparison-card.recommended::before {
            content: 'ĐỀ XUẤT HÀNG ĐẦU';
            position: absolute;
            top: -12px;
            left: 24px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: var(--text-white);
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 12px;
            letter-spacing: 0.04em;
        }
        
        .comparison-card-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 16px;
        }
        
        .comparison-card-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 240, 255, 0.1);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
        }
        
        .comparison-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
        }
        
        .comparison-card-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 16px;
        }
        
        .comparison-list {
            list-style: none;
            padding: 0;
            margin: 0 0 20px 0;
        }
        
        .comparison-list li {
            font-size: 0.88rem;
            color: var(--text-silver);
            padding: 8px 0;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }
        
        .comparison-list li i {
            color: var(--accent-cyan);
            font-size: 0.85rem;
            margin-top: 4px;
        }
        
        /* ============ STEPS / PROCESS ============ */
        .steps-section {
            background: var(--primary-bg);
        }
        
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }
        
        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition-base);
            position: relative;
        }
        
        .step-card:hover {
            border-color: rgba(0, 240, 255, 0.35);
            transform: translateY(-4px);
            box-shadow: var(--shadow-neon);
        }
        
        .step-number {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 12px;
            line-height: 1;
        }
        
        .step-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        
        .step-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        
        /* ============ FEATURES / METRICS ============ */
        .features-section {
            background: var(--secondary-bg);
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 40px;
        }
        
        .feature-item {
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 26px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all var(--transition-base);
        }
        
        .feature-item:hover {
            border-color: rgba(0, 82, 255, 0.4);
            box-shadow: var(--shadow-blue);
            transform: translateY(-3px);
        }
        
        .feature-icon {
            width: 44px;
            height: 44px;
            background: rgba(0, 82, 255, 0.15);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent-blue);
            margin-bottom: 16px;
        }
        
        .feature-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        
        .feature-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        
        /* ============ TABLE COMPARISON ============ */
        .table-section {
            background: var(--primary-bg);
        }
        
        .comparison-table-wrapper {
            margin-top: 40px;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-glass);
        }
        
        .table-custom {
            width: 100%;
            border-collapse: collapse;
            background: var(--card-bg);
        }
        
        .table-custom thead th {
            background: rgba(0, 82, 255, 0.15);
            color: var(--text-white);
            font-size: 0.85rem;
            font-weight: 700;
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-glass);
        }
        
        .table-custom tbody td {
            font-size: 0.85rem;
            color: var(--text-silver);
            padding: 14px 20px;
            border-bottom: 1px solid rgba(0, 240, 255, 0.06);
        }
        
        .table-custom tbody tr:hover {
            background: rgba(0, 240, 255, 0.04);
        }
        
        .table-custom .badge-check {
            color: var(--accent-cyan);
            font-size: 1rem;
        }
        
        .table-custom .badge-times {
            color: #EF4444;
            font-size: 1rem;
        }
        
        /* ============ FAQ ============ */
        .faq-section {
            background: var(--secondary-bg);
        }
        
        .accordion-custom {
            margin-top: 40px;
            max-width: 800px;
        }
        
        .accordion-item-custom {
            background: var(--card-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-base);
        }
        
        .accordion-item-custom:hover {
            border-color: rgba(0, 240, 255, 0.3);
        }
        
        .accordion-button-custom {
            width: 100%;
            background: transparent;
            color: var(--text-white);
            font-size: 0.95rem;
            font-weight: 600;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: all var(--transition-fast);
            text-align: left;
        }
        
        .accordion-button-custom:hover {
            color: var(--accent-cyan);
        }
        
        .accordion-button-custom .fa-chevron-down {
            transition: transform var(--transition-base);
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        
        .accordion-button-custom.active .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }
        
        .accordion-content-custom {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
        }
        
        .accordion-content-custom.active {
            max-height: 300px;
        }
        
        .accordion-body-custom {
            padding: 0 22px 20px;
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        
        /* ============ CTA ============ */
        .cta-section {
            background: linear-gradient(145deg, rgba(0, 82, 255, 0.12), rgba(0, 240, 255, 0.06));
            padding-top: 70px;
            padding-bottom: 70px;
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }
        
        .cta-box {
            background: var(--glass-bg);
            border: 1px solid var(--border-electric);
            border-radius: var(--radius-lg);
            padding: 40px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            text-align: left;
        }
        
        .cta-box h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        
        .cta-box p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            max-width: 500px;
        }
        
        /* ============ FOOTER ============ */
        .site-footer {
            background: rgba(6, 7, 12, 0.98);
            border-top: 1px solid var(--border-glass);
            padding-top: 60px;
            padding-bottom: 30px;
        }
        
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
        }
        
        .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: #D32F2F;
            color: var(--text-white);
            font-size: 0.7rem;
            font-weight: 800;
            border-radius: 50%;
            border: 2px solid #FFD700;
        }
        
        .footer-links {
            font-size: 0.88rem;
            line-height: 2.2;
        }
        
        .footer-links a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        
        .footer-links a:hover {
            color: var(--accent-cyan);
        }
        
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 40px;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        
        .footer-bottom span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        
        /* ============ FAB ============ */
        .fab-custom {
            position: fixed;
            left: 20px;
            bottom: 90px;
            z-index: 1060;
            width: 56px;
            height: 56px;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan)) 1;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            cursor: pointer;
            opacity: 0.65;
            transition: all var(--transition-base);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
            animation: fabBreath 2.5s ease-in-out infinite;
        }
        
        .fab-custom:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
            animation-play-state: paused;
        }
        
        .fab-custom:active {
            transform: scale(0.95);
            border-color: #FF007F;
            color: #FF007F;
        }
        
        @keyframes fabBreath {
            0%, 100% {
                box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
            }
            50% {
                box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
            }
        }
        
        .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--primary-bg);
            animation: blinkDot 1.2s ease-in-out infinite;
        }
        
        @keyframes blinkDot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        
        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 768px) {
            .hero-android {
                padding-top: 110px;
                padding-bottom: 60px;
            }
            
            .hero-visual {
                margin-top: 40px;
            }
            
            .comparison-grid {
                grid-template-columns: 1fr;
            }
            
            .section-padding {
                padding-top: 60px;
                padding-bottom: 60px;
            }
            
            .navbar-collapse {
                background: rgba(8, 9, 15, 0.98);
                border-radius: var(--radius-md);
                padding: 16px;
                margin-top: 12px;
                border: 1px solid var(--border-glass);
            }
            
            .navbar-nav {
                gap: 6px;
            }
            
            .navbar-custom .d-flex.gap-2 {
                margin-top: 12px;
                justify-content: flex-start;
            }
            
            .fab-custom {
                width: 50px;
                height: 50px;
                font-size: 1.1rem;
                left: 14px;
                bottom: 80px;
            }
            
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            
            .hero-stats {
                gap: 20px;
            }
            
            .steps-grid {
                grid-template-columns: 1fr;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
            
            .btn-primary-glow, .btn-outline-glow {
                width: 100%;
                justify-content: center;
            }
            
            .cta-box {
                padding: 24px;
            }
            
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            
            .navbar-brand-custom span:last-child {
                font-size: 0.95rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-hover: #3B82F6;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #64748B;
            --border-color: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.4);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.2);
            --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

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

        body {
            font-family: var(--font-family);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

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

        /* ========== HEADER ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition-medium), box-shadow var(--transition-medium);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
        }

        .navbar-custom {
            padding: 14px 0;
            min-height: 68px;
        }

        .navbar-brand-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-primary) !important;
            letter-spacing: -0.01em;
        }

        .navbar-brand-custom:hover {
            color: var(--accent-cyan) !important;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: #fff;
            flex-shrink: 0;
        }

        .nav-link-custom {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link-custom:hover {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.05);
        }

        .nav-link-custom.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.08);
        }

        .nav-link-custom.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .btn-login-nav {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .btn-login-nav:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.05);
        }

        .btn-signup-nav {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 8px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.35);
        }

        .btn-signup-nav:hover {
            box-shadow: 0 6px 25px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
            color: #fff;
        }

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

        .navbar-toggler:focus {
            box-shadow: none;
            border-color: var(--accent-cyan);
        }

        /* ========== HERO ========== */
        .category-hero {
            position: relative;
            padding: 70px 0 60px;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.08) 0%, transparent 60%),
                        radial-gradient(ellipse at 20% 20%, rgba(0, 82, 255, 0.12) 0%, transparent 50%),
                        radial-gradient(ellipse at 80% 80%, rgba(0, 240, 255, 0.08) 0%, transparent 50%),
                        var(--bg-primary);
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -150px;
            left: -100px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid var(--border-glow);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: 20px;
        }

        .hero-badge i {
            font-size: 0.75rem;
        }

        .category-hero h1 {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            color: var(--text-primary);
        }

        .category-hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 580px;
            margin-bottom: 30px;
            line-height: 1.7;
        }

        .hero-stats {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-stat .number {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
        }

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

        .btn-hero-primary {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-fast);
            cursor: pointer;
            box-shadow: 0 6px 25px rgba(0, 82, 255, 0.4);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-hero-primary:hover {
            box-shadow: 0 10px 40px rgba(0, 240, 255, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-hero-secondary {
            background: transparent;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-fast);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-hero-secondary:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-visual-panel {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 24px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: var(--shadow-card);
            width: 100%;
            max-width: 420px;
        }

        .hero-visual-panel .panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-visual-panel .panel-title {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
        }

        .hero-visual-panel .panel-badge {
            font-size: 0.7rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 50px;
            background: rgba(0, 240, 255, 0.15);
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .device-mockup {
            display: flex;
            align-items: center;
            gap: 16px;
            background: rgba(0, 82, 255, 0.06);
            border-radius: var(--radius-lg);
            padding: 20px;
            margin-bottom: 16px;
        }

        .device-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            flex-shrink: 0;
        }

        .device-info h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 2px;
            color: var(--text-primary);
        }

        .device-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 60px 0;
        }

        .section-title {
            font-size: 1.85rem;
            font-weight: 800;
            letter-spacing: -0.015em;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 560px;
            line-height: 1.7;
            margin-bottom: 40px;
        }

        /* ========== METRICS BOARD ========== */
        .metrics-board {
            background: var(--bg-secondary);
            border-radius: var(--radius-xl);
            padding: 40px;
            border: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .metrics-board::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-blue), transparent);
        }

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

        .metric-value {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .metric-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ========== FEATURE CARDS ========== */
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            height: 100%;
            transition: all var(--transition-fast);
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .feature-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity var(--transition-fast);
        }

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

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

        .feature-icon {
            width: 52px;
            height: 52px;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.15));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* ========== COMPARISON ========== */
        .comparison-table-wrap {
            background: var(--bg-secondary);
            border-radius: var(--radius-xl);
            padding: 32px;
            border: 1px solid var(--border-color);
            overflow-x: auto;
        }

        .comparison-table {
            width: 100%;
            min-width: 600px;
            border-collapse: separate;
            border-spacing: 0;
        }

        .comparison-table thead th {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--accent-cyan);
            padding: 12px 16px;
            border-bottom: 2px solid var(--border-glow);
            text-align: left;
        }

        .comparison-table tbody td {
            padding: 14px 16px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .comparison-table tbody tr:last-child td {
            border-bottom: none;
        }

        .comparison-table .check-icon {
            color: #10B981;
            font-size: 1.1rem;
        }

        .comparison-table .x-icon {
            color: #EF4444;
            font-size: 1.1rem;
        }

        /* ========== FAQ ========== */
        .accordion-custom .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            backdrop-filter: blur(10px);
        }

        .accordion-custom .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 18px 24px;
            border: none;
            box-shadow: none;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.05);
            color: var(--accent-cyan);
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            filter: brightness(0) invert(1);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            border-color: var(--accent-cyan);
        }

        .accordion-custom .accordion-body {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* ========== CTA FORM ========== */
        .cta-section {
            position: relative;
            padding: 70px 0;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.12) 0%, rgba(0, 240, 255, 0.06) 50%, transparent 100%),
                        var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-form-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 36px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: var(--shadow-card);
        }

        .cta-form-card h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .cta-form-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .form-control-custom {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            width: 100%;
        }

        .form-control-custom:focus {
            outline: none;
            border-color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.05);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1);
        }

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

        .form-label-custom {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
            display: block;
        }

        .btn-submit-cta {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 13px 32px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-fast);
            cursor: pointer;
            width: 100%;
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.4);
        }

        .btn-submit-cta:hover {
            box-shadow: 0 8px 35px rgba(0, 240, 255, 0.55);
            transform: translateY(-1px);
            color: #fff;
        }

        /* ========== FAB ========== */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.9), rgba(8, 9, 15, 0.9)), 
                              linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            transition: all var(--transition-fast);
            opacity: 0.7;
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab-support:hover {
            opacity: 1;
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
            transform: scale(1.08);
            color: var(--accent-cyan);
        }

        .fab-support:active {
            transform: scale(0.95);
        }

        .fab-support .notification-dot {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            background: #FF0055;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: blink-dot 1.5s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { box-shadow: 0 0 20px rgba(0, 240, 255, 0.3); }
            50% { box-shadow: 0 0 30px rgba(0, 240, 255, 0.55); }
        }

        @keyframes blink-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 50px 0 30px;
            margin-top: 0;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
        }

        .footer-links a,
        .footer-links span {
            display: inline-block;
            margin-bottom: 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 2px solid #EF4444;
            color: #EF4444;
            font-weight: 800;
            font-size: 0.8rem;
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            margin-top: 30px;
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .section {
                padding: 45px 0;
            }
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 50px 0 40px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-stat .number {
                font-size: 1.3rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .metrics-board {
                padding: 24px;
            }
            .metric-value {
                font-size: 1.8rem;
            }
            .cta-form-card {
                padding: 24px;
            }
            .navbar-custom {
                padding: 10px 0;
            }
            .btn-login-nav,
            .btn-signup-nav {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .fab-support {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 5px 12px;
            }
            .btn-hero-primary,
            .btn-hero-secondary {
                padding: 12px 20px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .hero-visual-panel {
                padding: 16px;
                max-width: 100%;
            }
            .section {
                padding: 35px 0;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .feature-card {
                padding: 20px;
            }
            .metrics-board {
                padding: 18px;
            }
            .metric-value {
                font-size: 1.5rem;
            }
            .comparison-table-wrap {
                padding: 16px;
            }
            .cta-form-card {
                padding: 18px;
            }
            .cta-form-card h3 {
                font-size: 1.2rem;
            }
        }