/* roulang page: index */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-navy-light: #151B2E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --bg-card-hover: rgba(21, 27, 46, 0.88);
            --electric-blue: #0052FF;
            --neon-cyan: #00F0FF;
            --neon-green: #00E676;
            --hot-pink: #FF007F;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8A94A6;
            --border-glow: rgba(0, 240, 255, 0.35);
            --border-blue: rgba(0, 82, 255, 0.45);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --shadow-neon: 0 0 24px rgba(0, 240, 255, 0.25);
            --shadow-glow: 0 0 40px rgba(0, 82, 255, 0.35);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --radius-full: 999px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-xxl: 80px;
            --font-heading: 'Be Vietnam Pro', sans-serif;
            --font-body: 'Inter', sans-serif;
            --transition: all 0.32s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            margin: 0;
            padding: 0;
            background: var(--bg-deep);
            color: var(--text-white);
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.65;
            overflow-x: hidden;
            position: relative;
            background-image: 
                radial-gradient(ellipse at top left, rgba(0, 82, 255, 0.12), transparent 55%),
                radial-gradient(ellipse at bottom right, rgba(0, 240, 255, 0.08), transparent 50%),
                radial-gradient(ellipse at center, rgba(13, 17, 30, 0.6), transparent 70%);
            background-attachment: fixed;
        }

        ::selection {
            background: var(--electric-blue);
            color: var(--text-white);
        }

        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-navy);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--electric-blue);
            border-radius: var(--radius-full);
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--neon-cyan);
        }

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

        a {
            color: var(--neon-cyan);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--text-white);
            text-decoration: none;
        }
        a:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 2px;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-white);
            margin-top: 0;
        }

        h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 900;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-md);
        }

        h2 {
            font-size: clamp(1.5rem, 3vw, 2.3rem);
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: var(--spacing-sm);
        }

        h3 {
            font-size: clamp(1.15rem, 2vw, 1.55rem);
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
        }

        p {
            color: var(--text-silver);
            margin-bottom: var(--spacing-sm);
        }

        .container {
            max-width: 1240px;
            padding-left: var(--spacing-sm);
            padding-right: var(--spacing-sm);
        }

        @media (min-width: 768px) {
            .container {
                padding-left: var(--spacing-md);
                padding-right: var(--spacing-md);
            }
        }

        /* ============ HEADER / NAVBAR ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--glass-border);
            padding: 10px 0;
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
            border-bottom-color: var(--border-glow);
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.15rem;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .navbar-brand .brand-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: linear-gradient(145deg, var(--electric-blue), var(--neon-cyan));
            border-radius: 10px;
            font-size: 16px;
            font-weight: 900;
            color: #fff;
            box-shadow: var(--shadow-neon);
        }

        .navbar-brand .brand-text {
            background: linear-gradient(135deg, #fff 40%, var(--neon-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-size: 1.05rem;
        }

        .navbar-brand:hover {
            color: var(--text-white);
        }
        .navbar-brand:hover .brand-badge {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.5);
            transform: scale(1.05);
        }

        .navbar-nav {
            gap: 4px;
        }

        .navbar-nav .nav-link {
            color: var(--text-silver);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.92rem;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            position: relative;
            letter-spacing: 0.01em;
            transition: var(--transition);
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.06);
        }

        .navbar-nav .nav-link.active {
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.08);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--neon-cyan);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }

        .btn-login {
            color: var(--text-silver);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.88rem;
            background: transparent;
            border: none;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.03em;
            transition: var(--transition);
        }
        .btn-login:hover {
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.06);
        }

        .btn-signup {
            background: linear-gradient(145deg, var(--electric-blue), #0040CC);
            color: #fff !important;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 0.88rem;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border-blue);
            box-shadow: 0 0 18px rgba(0, 82, 255, 0.35);
            letter-spacing: 0.02em;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-signup:hover {
            background: linear-gradient(145deg, #0A62FF, var(--electric-blue));
            box-shadow: 0 0 32px rgba(0, 82, 255, 0.55);
            transform: translateY(-1px);
            color: #fff;
        }
        .btn-signup:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(0, 82, 255, 0.3);
        }

        .navbar-toggler {
            border: 1px solid var(--glass-border);
            background: rgba(255, 255, 255, 0.04);
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .navbar-toggler:hover {
            border-color: var(--border-glow);
            background: rgba(0, 240, 255, 0.06);
        }
        .navbar-toggler:focus {
            box-shadow: none;
            border-color: var(--neon-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='%2300F0FF' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(8, 9, 15, 0.96);
                backdrop-filter: blur(18px);
                border-radius: var(--radius-md);
                border: 1px solid var(--glass-border);
                padding: var(--spacing-sm);
                margin-top: 10px;
            }
            .navbar-nav .nav-link {
                padding: 12px 16px;
            }
            .nav-actions {
                margin-left: 0;
                padding-top: 12px;
                border-top: 1px solid var(--glass-border);
                margin-top: 8px;
            }
        }

        /* ============ HERO SECTION ============ */
        .hero-section {
            position: relative;
            min-height: 100vh;
            padding: 140px 0 80px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8,9,15,0.82) 0%, rgba(8,9,15,0.65) 50%, rgba(8,9,15,0.85) 100%);
            z-index: 1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(0, 82, 255, 0.18), transparent 55%);
            z-index: 1;
            pointer-events: none;
        }

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

        .hero-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-glow);
            color: var(--neon-cyan);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.82rem;
            letter-spacing: 0.05em;
            padding: 8px 16px;
            border-radius: var(--radius-full);
            margin-bottom: var(--spacing-md);
            text-transform: uppercase;
        }

        .hero-label .pulse-dot {
            width: 8px;
            height: 8px;
            background: var(--neon-green);
            border-radius: 50%;
            animation: pulse-dot 2s infinite;
        }

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

        .hero-title {
            font-size: clamp(2.4rem, 5vw, 4rem);
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: var(--spacing-md);
            color: var(--text-white);
            text-shadow: 0 0 40px rgba(0, 240, 255, 0.2);
        }

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

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-silver);
            line-height: 1.7;
            max-width: 620px;
            margin-bottom: var(--spacing-lg);
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: var(--spacing-lg);
        }

        .btn-primary-cta {
            background: linear-gradient(145deg, var(--electric-blue), #0040CC);
            color: #fff;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border-blue);
            box-shadow: 0 0 32px rgba(0, 82, 255, 0.4);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.02em;
        }
        .btn-primary-cta:hover {
            background: linear-gradient(145deg, #0A62FF, var(--electric-blue));
            box-shadow: 0 0 48px rgba(0, 82, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary-cta:active {
            transform: translateY(0);
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.35);
        }

        .btn-outline-cta {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-white);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: var(--radius-full);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(10px);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-outline-cta:hover {
            border-color: var(--border-glow);
            background: rgba(0, 240, 255, 0.1);
            color: var(--neon-cyan);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            margin-top: var(--spacing-sm);
        }

        .hero-stat {
            text-align: left;
        }
        .hero-stat .stat-value {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.6rem;
            color: var(--neon-cyan);
            letter-spacing: -0.02em;
        }
        .hero-stat .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .progress-ring-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            z-index: 2;
        }

        .progress-ring-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: var(--spacing-lg);
            text-align: center;
            box-shadow: var(--shadow-neon);
            max-width: 420px;
            margin: 0 auto;
        }

        .progress-ring-svg {
            width: 160px;
            height: 160px;
            margin: 0 auto var(--spacing-sm);
            display: block;
            filter: drop-shadow(0 0 18px rgba(0, 240, 255, 0.35));
        }

        .progress-ring-circle-bg {
            fill: none;
            stroke: rgba(255, 255, 255, 0.06);
            stroke-width: 10;
        }
        .progress-ring-circle-fg {
            fill: none;
            stroke: url(#gradientStroke);
            stroke-width: 10;
            stroke-linecap: round;
            stroke-dasharray: 264;
            stroke-dashoffset: 34;
            animation: ring-fill 2.5s ease-out forwards;
        }

        @keyframes ring-fill {
            from { stroke-dashoffset: 264; }
            to { stroke-dashoffset: 34; }
        }

        .progress-ring-value {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.8rem;
            color: var(--neon-cyan);
            margin-bottom: 4px;
        }
        .progress-ring-label {
            font-size: 0.85rem;
            color: var(--text-silver);
            margin-bottom: var(--spacing-sm);
        }

        .tier-preview {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: var(--spacing-sm);
        }

        .tier-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-sm);
            padding: 10px 16px;
            transition: var(--transition);
            cursor: pointer;
        }
        .tier-item:hover {
            border-color: var(--border-glow);
            background: rgba(0, 240, 255, 0.06);
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.15);
        }
        .tier-item .tier-name {
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-white);
        }
        .tier-item .tier-bonus {
            font-size: 0.8rem;
            color: var(--neon-cyan);
            font-weight: 600;
        }

        /* ============ SECTION GENERIC ============ */
        section {
            padding: var(--spacing-xxl) 0;
            position: relative;
        }

        .section-label {
            display: inline-block;
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.78rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--neon-cyan);
            margin-bottom: var(--spacing-xs);
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.3rem);
            font-weight: 800;
            letter-spacing: -0.015em;
            margin-bottom: var(--spacing-sm);
        }

        .section-desc {
            font-size: 1.02rem;
            color: var(--text-silver);
            max-width: 720px;
            margin-bottom: var(--spacing-lg);
            line-height: 1.7;
        }

        /* ============ SCREENSHOT STAGE ============ */
        .screenshot-stage {
            background: var(--bg-navy);
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
        }

        .screenshot-stage .stage-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--glass-border);
            box-shadow: 0 8px 48px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 240, 255, 0.12);
            margin-bottom: var(--spacing-lg);
        }
        .screenshot-stage .stage-visual img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .screenshot-stage .stage-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(8,9,15,0.4) 100%);
            pointer-events: none;
        }

        .feature-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 240, 255, 0.09);
            border: 1px solid rgba(0, 240, 255, 0.2);
            color: var(--neon-cyan);
            padding: 6px 14px;
            border-radius: var(--radius-full);
            font-size: 0.82rem;
            font-weight: 500;
            margin-right: 8px;
            margin-bottom: 8px;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: var(--spacing-md) 0;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            color: var(--text-silver);
            font-size: 0.95rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .feature-list li:last-child {
            border-bottom: none;
        }
        .feature-list .feature-icon {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 50%;
            color: var(--neon-cyan);
            font-size: 12px;
        }

        /* ============ THREE STEPS ============ */
        .steps-section {
            background: var(--bg-deep);
        }

        .step-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
            opacity: 0;
            transition: var(--transition);
        }
        .step-card:hover {
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
        }
        .step-card:hover::before {
            opacity: 1;
        }

        .step-number {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 2.5rem;
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: var(--spacing-xs);
            display: inline-block;
        }
        .step-card h3 {
            font-size: 1.2rem;
            margin-bottom: var(--spacing-xs);
        }
        .step-card p {
            color: var(--text-silver);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ============ TOP 10 LIST ============ */
        .top10-section {
            background: var(--bg-navy);
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
        }

        .rank-list {
            list-style: none;
            padding: 0;
            margin: 0;
            counter-reset: rank-counter;
        }

        .rank-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            margin-bottom: var(--spacing-sm);
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .rank-item::before {
            content: '🏆';
            position: absolute;
            top: -10px;
            right: 20px;
            font-size: 70px;
            opacity: 0.06;
            pointer-events: none;
        }
        .rank-item:hover {
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.12);
            transform: translateX(4px);
        }

        .rank-badge {
            flex-shrink: 0;
            width: 46px;
            height: 46px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.15rem;
            background: linear-gradient(145deg, var(--electric-blue), #0033AA);
            border-radius: var(--radius-sm);
            color: #fff;
            border: 1px solid var(--border-blue);
            box-shadow: 0 0 12px rgba(0, 82, 255, 0.3);
        }
        .rank-item:nth-child(1) .rank-badge {
            background: linear-gradient(145deg, #FFD700, #FF8C00);
            border-color: rgba(255, 215, 0, 0.5);
            box-shadow: 0 0 16px rgba(255, 215, 0, 0.4);
            color: #1a1a1a;
        }
        .rank-item:nth-child(2) .rank-badge {
            background: linear-gradient(145deg, #C0C0C0, #8A8A8A);
            border-color: rgba(192, 192, 192, 0.5);
            box-shadow: 0 0 16px rgba(192, 192, 192, 0.35);
            color: #1a1a1a;
        }
        .rank-item:nth-child(3) .rank-badge {
            background: linear-gradient(145deg, #CD7F32, #8B4513);
            border-color: rgba(205, 127, 50, 0.5);
            box-shadow: 0 0 16px rgba(205, 127, 50, 0.35);
        }

        .rank-item .rank-content {
            flex: 1;
            min-width: 0;
        }
        .rank-item .rank-title {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.08rem;
            color: var(--text-white);
            margin-bottom: 4px;
        }
        .rank-item .rank-desc {
            font-size: 0.88rem;
            color: var(--text-silver);
            margin-bottom: 6px;
            line-height: 1.55;
        }
        .rank-item .rank-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .rank-item .rank-meta i {
            color: var(--neon-cyan);
            margin-right: 4px;
        }
        .rank-item .rank-action {
            flex-shrink: 0;
            align-self: center;
        }
        .btn-rank-play {
            background: linear-gradient(145deg, var(--electric-blue), #0040CC);
            color: #fff;
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border-blue);
            box-shadow: 0 0 14px rgba(0, 82, 255, 0.3);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-rank-play:hover {
            background: linear-gradient(145deg, #0A62FF, var(--electric-blue));
            box-shadow: 0 0 24px rgba(0, 82, 255, 0.5);
            color: #fff;
            transform: translateY(-1px);
        }

        /* ============ REVIEW WALL ============ */
        .reviews-section {
            background: var(--bg-deep);
        }

        .review-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            height: 100%;
            transition: var(--transition);
        }
        .review-card:hover {
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-neon);
        }
        .review-stars {
            color: #FFD700;
            font-size: 0.9rem;
            letter-spacing: 2px;
            margin-bottom: var(--spacing-xs);
        }
        .review-text {
            font-style: italic;
            color: var(--text-silver);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: var(--spacing-sm);
        }
        .review-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .review-avatar {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: linear-gradient(145deg, var(--electric-blue), var(--neon-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 0.9rem;
            color: #fff;
        }
        .review-author .author-name {
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-white);
        }
        .review-author .author-role {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* ============ LEAD FORM ============ */
        .lead-form-section {
            background: var(--bg-navy);
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
        }

        .lead-form-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            backdrop-filter: blur(14px);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.35);
        }

        .form-control-custom {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            color: var(--text-white);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 0.92rem;
            transition: var(--transition);
        }
        .form-control-custom::placeholder {
            color: var(--text-muted);
        }
        .form-control-custom:focus {
            background: rgba(0, 240, 255, 0.06);
            border-color: var(--neon-cyan);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.12);
            color: var(--text-white);
            outline: none;
        }

        .privacy-note {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: var(--spacing-xs);
            line-height: 1.5;
        }
        .privacy-note i {
            color: var(--neon-cyan);
            margin-right: 4px;
        }

        /* ============ NEWS / CMS ============ */
        .news-section {
            background: var(--bg-deep);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: var(--spacing-lg);
        }

        .news-main-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .news-main-list .news-item {
            display: block;
            padding: var(--spacing-md);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            text-decoration: none;
        }
        .news-main-list .news-item:hover {
            background: rgba(0, 240, 255, 0.04);
            border-bottom-color: var(--border-glow);
            transform: translateX(4px);
        }
        .news-main-list .news-item .news-title {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-white);
            margin-bottom: 6px;
        }
        .news-main-list .news-item:hover .news-title {
            color: var(--neon-cyan);
        }
        .news-main-list .news-item .news-summary {
            font-size: 0.88rem;
            color: var(--text-silver);
            margin-bottom: 8px;
            line-height: 1.55;
        }
        .news-main-list .news-item .news-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .news-main-list .news-item .news-meta i {
            color: var(--neon-cyan);
            margin-right: 5px;
        }

        .news-sidebar {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
        }
        .news-sidebar .sidebar-heading {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            padding-bottom: var(--spacing-xs);
            border-bottom: 1px solid var(--glass-border);
        }
        .sidebar-tip {
            font-size: 0.88rem;
            color: var(--text-silver);
            line-height: 1.6;
            margin-bottom: var(--spacing-sm);
        }

        @media (min-width: 768px) {
            .news-layout {
                grid-template-columns: 1.8fr 1fr;
            }
        }

        /* ============ DOWNLOAD GUIDE ============ */
        .download-section {
            background: var(--bg-navy);
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
        }

        .download-panel {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            text-align: left;
            backdrop-filter: blur(14px);
            position: relative;
            overflow: hidden;
        }
        .download-panel::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15), transparent 70%);
            pointer-events: none;
        }

        .platform-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-sm);
            padding: 12px 20px;
            margin-right: 10px;
            margin-bottom: 10px;
            color: var(--text-white);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.88rem;
            transition: var(--transition);
            cursor: pointer;
        }
        .platform-badge:hover {
            border-color: var(--border-glow);
            background: rgba(0, 240, 255, 0.08);
            color: var(--neon-cyan);
        }
        .platform-badge i {
            font-size: 1.3rem;
            color: var(--neon-cyan);
        }

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

        .accordion-custom .accordion-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-sm);
            margin-bottom: var(--spacing-xs);
            overflow: hidden;
            transition: var(--transition);
        }
        .accordion-custom .accordion-item:hover {
            border-color: var(--border-glow);
        }
        .accordion-custom .accordion-button {
            background: transparent;
            color: var(--text-white);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 16px 20px;
            border: none;
            border-radius: 0;
            transition: var(--transition);
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.05);
            color: var(--neon-cyan);
            box-shadow: none;
        }
        .accordion-custom .accordion-button::after {
            filter: invert(70%) sepia(90%) saturate(1000%) hue-rotate(130deg);
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            border-color: var(--neon-cyan);
            outline: none;
        }
        .accordion-custom .accordion-body {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.7;
            padding: 16px 20px;
            background: rgba(0, 0, 0, 0.2);
        }

        /* ============ FOOTER CTA & FOOTER ============ */
        .footer-cta-section {
            background: var(--bg-navy);
            border-top: 1px solid var(--glass-border);
            padding: var(--spacing-lg) 0;
            text-align: center;
        }
        .footer-cta-section .cta-inner {
            max-width: 640px;
            margin: 0 auto;
        }

        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--glass-border);
            padding: var(--spacing-lg) 0 var(--spacing-sm);
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .site-footer .footer-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-white);
            margin-bottom: var(--spacing-xs);
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0 0 var(--spacing-sm);
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
        }
        .site-footer .footer-links a {
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: var(--neon-cyan);
        }
        .site-footer .footer-copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: var(--spacing-sm);
            margin-top: var(--spacing-sm);
            font-size: 0.78rem;
            line-height: 1.6;
        }
        .site-footer .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: #D32F2F;
            color: #fff;
            font-weight: 900;
            font-family: var(--font-heading);
            font-size: 0.8rem;
            border-radius: 50%;
            border: 2px solid #fff;
            margin-right: 8px;
        }
        .payment-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: var(--spacing-xs);
        }
        .payment-badge {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--glass-border);
            border-radius: 6px;
            padding: 6px 12px;
            font-size: 0.75rem;
            color: var(--text-silver);
            font-weight: 600;
        }

        /* ============ FAB ============ */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1060;
            display: flex;
            align-items: center;
            gap: 10px;
            background: rgba(8, 9, 15, 0.72);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid transparent;
            border-radius: var(--radius-full);
            padding: 12px 20px;
            cursor: pointer;
            text-decoration: none;
            opacity: 0.65;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .fab-support::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: var(--radius-full);
            background: linear-gradient(120deg, var(--neon-green), var(--electric-blue), var(--neon-cyan), var(--neon-green));
            background-size: 300% 300%;
            animation: gradient-border 4s ease infinite;
            z-index: -1;
        }
        .fab-support::after {
            content: '';
            position: absolute;
            inset: 2px;
            border-radius: var(--radius-full);
            background: rgba(8, 9, 15, 0.88);
            z-index: -1;
        }

        @keyframes gradient-border {
            0%, 100% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
        }

        .fab-support:hover {
            opacity: 1;
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
        }
        .fab-support:active {
            transform: scale(0.96);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.35);
        }

        .fab-support .fab-icon {
            font-size: 1.2rem;
            color: var(--neon-cyan);
            animation: fab-icon-flicker 3s ease infinite;
        }
        @keyframes fab-icon-flicker {
            0%, 90%, 100% { opacity: 1; }
            92% { opacity: 0.3; }
            94% { opacity: 1; }
            96% { opacity: 0.4; }
            98% { opacity: 1; }
        }
        .fab-support .fab-text {
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.8rem;
            color: var(--text-white);
            letter-spacing: 0.02em;
        }
        .fab-support .fab-notification {
            position: absolute;
            top: 8px;
            right: 10px;
            width: 8px;
            height: 8px;
            background: var(--hot-pink);
            border-radius: 50%;
            box-shadow: 0 0 10px var(--hot-pink);
            animation: fab-notif-blink 2s ease infinite;
        }
        @keyframes fab-notif-blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.25; }
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 767px) {
            .hero-section {
                padding: 110px 0 60px;
                min-height: auto;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-actions {
                gap: 10px;
            }
            .btn-primary-cta,
            .btn-outline-cta {
                padding: 12px 20px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stat .stat-value {
                font-size: 1.3rem;
            }
            .progress-ring-card {
                margin-top: var(--spacing-md);
                max-width: 100%;
            }
            .progress-ring-svg {
                width: 130px;
                height: 130px;
            }
            .rank-item {
                flex-direction: column;
                gap: var(--spacing-xs);
            }
            .rank-item .rank-action {
                align-self: stretch;
            }
            .btn-rank-play {
                width: 100%;
                justify-content: center;
                display: flex;
            }
            .step-card {
                padding: var(--spacing-md);
            }
            .fab-support {
                padding: 10px 14px;
                bottom: 72px;
                left: 12px;
            }
            .fab-support .fab-text {
                display: none;
            }
            .site-header {
                padding: 6px 0;
            }
            .navbar-brand {
                font-size: 0.95rem;
            }
            .navbar-brand .brand-badge {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
            .btn-login {
                padding: 8px 10px;
                font-size: 0.8rem;
            }
            .btn-signup {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
            section {
                padding: var(--spacing-lg) 0;
            }
            .section-title {
                font-size: 1.45rem;
            }
            .section-desc {
                font-size: 0.95rem;
            }
        }

        @media (min-width: 768px) and (max-width: 991px) {
            .hero-section {
                padding: 130px 0 70px;
            }
            .hero-title {
                font-size: 2.5rem;
            }
            .progress-ring-svg {
                width: 140px;
                height: 140px;
            }
        }

        @media (max-width: 576px) {
            .hero-section {
                padding: 100px 0 50px;
            }
            .hero-label {
                font-size: 0.72rem;
                padding: 6px 12px;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn-primary-cta,
            .btn-outline-cta {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 10px;
            }
            .rank-badge {
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .platform-badge {
                padding: 10px 16px;
                font-size: 0.82rem;
                width: 100%;
                justify-content: center;
            }
            .lead-form-card {
                padding: var(--spacing-md);
            }
        }

        @media (max-width: 400px) {
            .navbar-brand .brand-text {
                font-size: 0.85rem;
            }
            .btn-login {
                display: none;
            }
            .btn-signup {
                padding: 8px 12px;
                font-size: 0.78rem;
            }
        }

/* roulang page: article */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-navy-light: #151B2E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --bg-card-hover: rgba(21, 27, 46, 0.88);
            --electric-blue: #0052FF;
            --neon-cyan: #00F0FF;
            --neon-green: #00E676;
            --hot-pink: #FF007F;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8A94A6;
            --border-glow: rgba(0, 240, 255, 0.35);
            --border-blue: rgba(0, 82, 255, 0.45);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --shadow-neon: 0 0 24px rgba(0, 240, 255, 0.25);
            --shadow-glow: 0 0 40px rgba(0, 82, 255, 0.35);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --radius-full: 999px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-xxl: 80px;
            --font-heading: 'Be Vietnam Pro', sans-serif;
            --font-body: 'Inter', sans-serif;
            --transition: all 0.32s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            margin: 0;
            padding: 0;
            background: var(--bg-deep);
            color: var(--text-white);
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.65;
            overflow-x: hidden;
            position: relative;
            background-image: 
                radial-gradient(ellipse at top left, rgba(0, 82, 255, 0.12), transparent 55%),
                radial-gradient(ellipse at bottom right, rgba(0, 240, 255, 0.08), transparent 50%),
                radial-gradient(ellipse at center, rgba(13, 17, 30, 0.6), transparent 70%);
            background-attachment: fixed;
        }

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

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

        a:hover {
            color: var(--text-white);
            text-decoration: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container {
            max-width: 1240px;
            padding-left: var(--spacing-sm);
            padding-right: var(--spacing-sm);
        }

        .section-padding {
            padding-top: 72px;
            padding-bottom: 72px;
        }

        .section-padding-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            letter-spacing: 0.14em;
            text-transform: uppercase;
            color: var(--neon-cyan);
            font-weight: 800;
            margin-bottom: 12px;
        }

        .eyebrow::before {
            content: "";
            width: 26px;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 999px;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.65);
        }

        .section-title {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: clamp(1.85rem, 4vw, 2.8rem);
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            color: var(--text-white);
        }

        .section-lead {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 720px;
            margin-bottom: 32px;
        }

        .text-gradient {
            background: linear-gradient(135deg, #fff 20%, var(--neon-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--glass-border);
            padding: 10px 0;
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
            border-bottom-color: var(--border-glow);
        }

        .site-header .navbar {
            position: relative;
            min-height: 56px;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.15rem;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .navbar-brand .brand-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(145deg, var(--electric-blue), var(--neon-cyan));
            border-radius: 10px;
            font-size: 16px;
            font-weight: 900;
            color: #fff;
            box-shadow: var(--shadow-neon);
            transition: var(--transition);
        }

        .navbar-brand .brand-text {
            background: linear-gradient(135deg, #fff 40%, var(--neon-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-size: 1.02rem;
        }

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

        .navbar-brand:hover .brand-badge {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.5);
            transform: scale(1.05);
        }

        .navbar-nav {
            gap: 4px;
        }

        .navbar-nav .nav-link {
            color: var(--text-silver);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.92rem;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            position: relative;
            letter-spacing: 0.01em;
            transition: var(--transition);
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.06);
        }

        .navbar-nav .nav-link.active {
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.08);
        }

        .navbar-toggler {
            width: 42px;
            height: 42px;
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.04);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-white);
            font-size: 1.1rem;
            transition: var(--transition);
        }

        .navbar-toggler:hover {
            border-color: var(--neon-cyan);
            box-shadow: var(--shadow-neon);
        }

        .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, 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--glass-border);
            color: var(--text-silver);
            padding: 9px 16px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.88rem;
            transition: var(--transition);
            white-space: nowrap;
        }

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

        .btn-signup {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--electric-blue), var(--neon-cyan));
            color: #fff;
            padding: 10px 18px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: var(--shadow-neon);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-signup:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 34px rgba(0, 240, 255, 0.45);
            background: linear-gradient(135deg, #0a5cff, #2bf1ff);
        }

        /* Buttons */
        .btn {
            transition: var(--transition);
            font-weight: 700;
        }

        .btn-neon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--electric-blue), var(--neon-cyan));
            color: #fff;
            border: none;
            padding: 12px 22px;
            border-radius: var(--radius-full);
            box-shadow: var(--shadow-neon);
            font-weight: 700;
        }

        .btn-neon:hover,
        .btn-neon:focus {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 36px rgba(0, 240, 255, 0.45);
            background: linear-gradient(135deg, #0a5cff, #2bf1ff);
        }

        .btn-outline-neon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--neon-cyan);
            border: 1px solid var(--border-glow);
            padding: 12px 22px;
            border-radius: var(--radius-full);
            font-weight: 700;
        }

        .btn-outline-neon:hover,
        .btn-outline-neon:focus {
            color: #fff;
            border-color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.08);
            box-shadow: var(--shadow-neon);
        }

        .btn-neon.btn-lg,
        .btn-outline-neon.btn-lg {
            padding: 14px 26px;
            font-size: 1rem;
        }

        /* Article hero */
        .article-hero {
            position: relative;
            padding: 150px 0 60px;
            background:
                radial-gradient(circle at 18% 15%, rgba(0, 82, 255, 0.18), transparent 32%),
                radial-gradient(circle at 85% 70%, rgba(0, 240, 255, 0.1), transparent 30%),
                linear-gradient(180deg, rgba(8, 9, 15, 0.45), rgba(8, 9, 15, 0.95));
            border-bottom: 1px solid var(--glass-border);
            overflow: hidden;
        }

        .article-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
            background-size: 38px 38px;
            pointer-events: none;
            mask-image: linear-gradient(180deg, rgba(0,0,0,0.7), transparent);
            -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.7), transparent);
        }

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

        .article-breadcrumb {
            margin-bottom: 18px;
        }

        .article-breadcrumb .breadcrumb {
            --bs-breadcrumb-divider-color: var(--text-muted);
            margin: 0;
            font-size: 0.88rem;
        }

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

        .article-breadcrumb .breadcrumb-item a:hover {
            color: var(--neon-cyan);
        }

        .article-breadcrumb .breadcrumb-item.active {
            color: var(--text-silver);
        }

        .article-title {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: clamp(1.9rem, 4.5vw, 3.5rem);
            line-height: 1.15;
            letter-spacing: -0.025em;
            margin-bottom: 18px;
            max-width: 820px;
            color: var(--text-white);
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 22px;
            margin-bottom: 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

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

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

        .article-excerpt {
            font-size: 1.12rem;
            line-height: 1.75;
            color: var(--text-silver);
            max-width: 800px;
            margin-bottom: 28px;
        }

        .article-cover {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow-glow);
            background: var(--bg-navy);
            aspect-ratio: 5 / 7;
            max-height: 620px;
        }

        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: saturate(1.1) contrast(1.05);
            transition: filter 0.5s ease, transform 0.8s ease;
        }

        .article-cover:hover img {
            filter: saturate(1.2) contrast(1.1);
            transform: scale(1.035);
        }

        .article-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(145deg, rgba(0, 82, 255, 0.16), transparent 45%, rgba(0, 240, 255, 0.12));
            pointer-events: none;
            border-radius: inherit;
        }

        /* Article layout */
        .article-body-section {
            position: relative;
            background: rgba(8, 9, 15, 0.4);
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 40px;
            align-items: start;
        }

        .article-main {
            min-width: 0;
            background: var(--bg-card);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: clamp(20px, 4vw, 40px);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.78;
            color: var(--text-silver);
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            font-family: var(--font-heading);
            color: var(--text-white);
            font-weight: 800;
            letter-spacing: -0.015em;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }

        .article-content h2 {
            font-size: 1.65rem;
        }

        .article-content h3 {
            font-size: 1.35rem;
        }

        .article-content p {
            margin-bottom: 1.4rem;
        }

        .article-content a {
            color: var(--neon-cyan);
            border-bottom: 1px dotted rgba(0, 240, 255, 0.5);
        }

        .article-content a:hover {
            color: #fff;
            border-bottom-color: #fff;
        }

        .article-content ul,
        .article-content ol {
            padding-left: 1.5rem;
            margin-bottom: 1.6rem;
        }

        .article-content li {
            margin-bottom: 0.5rem;
        }

        .article-content blockquote {
            border-left: 3px solid var(--neon-cyan);
            background: rgba(0, 240, 255, 0.05);
            padding: 1rem 1.25rem;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-white);
            margin: 1.6rem 0;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.8rem 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.6rem 0;
            background: rgba(0, 0, 0, 0.2);
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

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

        .article-content th {
            background: rgba(0, 240, 255, 0.06);
            color: #fff;
            font-weight: 700;
        }

        .inline-cta {
            margin-top: 36px;
            padding: 28px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.12), rgba(0, 240, 255, 0.08));
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .inline-cta-text strong {
            display: block;
            font-family: var(--font-heading);
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: 4px;
        }

        .inline-cta-text span {
            color: var(--text-muted);
            font-size: 0.92rem;
        }

        /* Aside */
        .article-aside {
            position: sticky;
            top: 120px;
            align-self: start;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .aside-card {
            background: var(--bg-card);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 24px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

        .aside-card h3 {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .aside-card h3 i {
            color: var(--neon-cyan);
        }

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

        .rank-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 0;
            border-bottom: 1px solid var(--glass-border);
        }

        .rank-list li:last-child {
            border-bottom: 0;
            padding-bottom: 0;
        }

        .rank-number {
            flex: 0 0 30px;
            width: 30px;
            height: 30px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: linear-gradient(145deg, var(--electric-blue), var(--neon-cyan));
            color: #fff;
            font-weight: 900;
            font-size: 0.86rem;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.25);
        }

        .rank-info {
            min-width: 0;
        }

        .rank-info strong {
            display: block;
            color: #fff;
            font-size: 0.94rem;
            margin-bottom: 2px;
        }

        .rank-info span {
            color: var(--text-muted);
            font-size: 0.8rem;
        }

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

        .criteria-list li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            color: var(--text-silver);
            font-size: 0.92rem;
        }

        .criteria-list i {
            color: var(--neon-green);
            margin-top: 4px;
        }

        /* Benefit cards */
        .benefit-section {
            background: linear-gradient(180deg, rgba(13, 17, 30, 0.35), rgba(8, 9, 15, 0.7));
        }

        .benefit-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .benefit-item {
            background: var(--bg-card);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 26px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .benefit-item::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--electric-blue), var(--neon-cyan));
            opacity: 0;
            transition: var(--transition);
        }

        .benefit-item:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-neon);
            background: var(--bg-card-hover);
        }

        .benefit-item:hover::before {
            opacity: 1;
        }

        .benefit-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 255, 0.1);
            color: var(--neon-cyan);
            font-size: 1.35rem;
            margin-bottom: 18px;
            border: 1px solid rgba(0, 240, 255, 0.25);
        }

        .benefit-item h3 {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.18rem;
            color: #fff;
            margin-bottom: 10px;
        }

        .benefit-item p {
            color: var(--text-muted);
            margin: 0;
            font-size: 0.96rem;
            line-height: 1.7;
        }

        /* Process */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .process-step {
            background: rgba(13, 17, 30, 0.72);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 22px;
            position: relative;
            transition: var(--transition);
        }

        .process-step:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
        }

        .step-number {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 2rem;
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 10px;
        }

        .process-step h3 {
            font-family: var(--font-heading);
            font-size: 1.05rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
        }

        .process-step p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin: 0;
            line-height: 1.65;
        }

        /* Trust */
        .trust-panel {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.12), rgba(0, 240, 255, 0.08));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: clamp(24px, 5vw, 48px);
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .trust-metric {
            text-align: left;
        }

        .trust-metric strong {
            display: block;
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            color: #fff;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .trust-metric span {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .trust-metric i {
            color: var(--neon-cyan);
            margin-right: 6px;
        }

        /* FAQ */
        .faq-accordion .accordion-item {
            background: rgba(13, 17, 30, 0.72);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: #fff;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1rem;
            padding: 18px 22px;
            box-shadow: none;
            gap: 10px;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.06);
            color: var(--neon-cyan);
            box-shadow: none;
        }

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

        .faq-accordion .accordion-body {
            color: var(--text-silver);
            background: rgba(8, 9, 15, 0.35);
            padding: 18px 22px;
            font-size: 0.96rem;
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            position: relative;
            background-image: linear-gradient(rgba(8, 9, 15, 0.78), rgba(8, 9, 15, 0.9)), url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-glow);
        }

        .cta-panel {
            padding: clamp(28px, 6vw, 56px);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .cta-panel h2 {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: clamp(1.7rem, 4vw, 2.6rem);
            line-height: 1.15;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-panel p {
            color: var(--text-silver);
            font-size: 1.05rem;
            max-width: 680px;
            margin-bottom: 26px;
        }

        .cta-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            max-width: 560px;
            margin-bottom: 14px;
        }

        .cta-form input {
            flex: 1 1 260px;
            background: rgba(8, 9, 15, 0.75);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-full);
            color: #fff;
            padding: 13px 18px;
            font-family: var(--font-body);
            transition: var(--transition);
        }

        .cta-form input::placeholder {
            color: var(--text-muted);
        }

        .cta-form input:focus {
            outline: none;
            border-color: var(--neon-cyan);
            box-shadow: var(--shadow-neon);
        }

        .cta-note {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin: 0;
        }

        .cta-note i {
            color: var(--neon-green);
            margin-right: 6px;
        }

        /* Footer */
        .site-footer {
            background: #05060A;
            border-top: 1px solid var(--glass-border);
            padding: 64px 0 32px;
            margin-top: 72px;
        }

        .footer-brand {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.15rem;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 0, 127, 0.12);
            color: var(--hot-pink);
            border: 1px solid rgba(255, 0, 127, 0.45);
            font-weight: 900;
            font-size: 0.85rem;
        }

        .payment-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 18px;
        }

        .payment-badge {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            color: var(--text-silver);
            padding: 8px 14px;
            border-radius: var(--radius-full);
            font-size: 0.82rem;
            font-weight: 600;
        }

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

        .footer-links a {
            color: var(--text-silver);
            font-size: 0.94rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a::before {
            content: "\f105";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--neon-cyan);
            font-size: 0.8rem;
        }

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

        .footer-copyright {
            border-top: 1px solid var(--glass-border);
            margin-top: 40px;
            padding-top: 22px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.82rem;
        }

        .footer-copyright p {
            margin-bottom: 4px;
        }

        /* Floating action button */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1055;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 18px;
            background: rgba(8, 9, 15, 0.72);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(0, 240, 255, 0.65);
            border-radius: var(--radius-full);
            color: #fff;
            text-decoration: none;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: var(--transition);
            animation: floatY 3.2s ease-in-out infinite;
            opacity: 0.82;
        }

        .fab-support:hover {
            color: #fff;
            opacity: 1;
            transform: scale(1.06);
            box-shadow: 0 0 26px rgba(0, 240, 255, 0.7);
        }

        .fab-support i {
            color: var(--neon-cyan);
            font-size: 1.15rem;
        }

        .fab-label {
            font-weight: 700;
            font-size: 0.85rem;
            white-space: nowrap;
        }

        .fab-notice {
            position: absolute;
            top: -5px;
            right: -3px;
            background: var(--hot-pink);
            color: #fff;
            font-size: 0.62rem;
            font-weight: 900;
            padding: 3px 6px;
            border-radius: 999px;
            box-shadow: 0 0 12px rgba(255, 0, 127, 0.7);
            animation: pulseGlow 1.6s ease-in-out infinite;
        }

        /* Conversion bar */
        .conversion-bar {
            position: fixed;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 1040;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid var(--border-glow);
            padding: 12px 0;
            transform: translateY(100%);
            transition: transform 0.38s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .conversion-bar.show {
            transform: translateY(0);
        }

        .conversion-bar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .conversion-text {
            color: var(--text-silver);
            font-size: 0.92rem;
        }

        .conversion-text strong {
            color: #fff;
            font-family: var(--font-heading);
            display: block;
            margin-bottom: 2px;
        }

        .conversion-actions {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .btn-sm {
            padding: 9px 16px;
            font-size: 0.84rem;
        }

        /* Mobile navigation visibility */
        @media (max-width: 991.98px) {
            .site-header .navbar-collapse.collapse:not(.show) {
                display: block !important;
                position: static;
            }

            .site-header .navbar-collapse.collapse:not(.show) .navbar-nav {
                display: none !important;
            }

            .site-header .navbar-collapse.collapse:not(.show) .nav-actions {
                display: flex !important;
                position: absolute;
                right: 58px;
                top: 50%;
                transform: translateY(-50%);
                margin: 0;
                gap: 8px;
            }

            .site-header .navbar-collapse.show .nav-actions {
                justify-content: flex-start;
                padding: 12px 0 8px;
            }
        }

        @media (max-width: 767.98px) {
            .section-padding {
                padding-top: 52px;
                padding-bottom: 52px;
            }

            .article-hero {
                padding-top: 125px;
                padding-bottom: 40px;
            }

            .article-cover {
                aspect-ratio: 16 / 10;
                max-height: 420px;
                margin-top: 16px;
            }

            .article-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .article-aside {
                position: static;
                display: grid;
                grid-template-columns: 1fr;
            }

            .benefit-grid {
                grid-template-columns: 1fr;
            }

            .process-grid {
                grid-template-columns: 1fr 1fr;
            }

            .trust-panel {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }

            .inline-cta {
                flex-direction: column;
                align-items: flex-start;
            }

            .conversion-bar-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .fab-support {
                left: 10px;
                bottom: 88px;
                padding: 10px 14px;
            }

            .fab-label {
                display: none;
            }

            .site-header .navbar-brand .brand-text {
                font-size: 0.92rem;
            }

            .btn-login {
                padding: 8px 12px;
                font-size: 0.8rem;
            }

            .btn-signup {
                padding: 8px 13px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 520px) {
            .article-title {
                font-size: 1.65rem;
            }

            .article-meta {
                gap: 8px 14px;
                font-size: 0.82rem;
            }

            .article-main {
                padding: 18px;
            }

            .process-grid {
                grid-template-columns: 1fr;
            }

            .trust-panel {
                grid-template-columns: 1fr;
            }

            .cta-form {
                flex-direction: column;
            }

            .cta-form input {
                width: 100%;
            }

            .section-title {
                font-size: 1.7rem;
            }
        }

        @keyframes floatY {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-8px);
            }
        }

        @keyframes pulseGlow {
            0%, 100% {
                box-shadow: 0 0 10px rgba(255, 0, 127, 0.65);
            }
            50% {
                box-shadow: 0 0 22px rgba(255, 0, 127, 0.95);
            }
        }

/* roulang page: category2 */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-navy-light: #151B2E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --bg-card-hover: rgba(21, 27, 46, 0.88);
            --electric-blue: #0052FF;
            --neon-cyan: #00F0FF;
            --neon-green: #00E676;
            --hot-pink: #FF007F;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8A94A6;
            --border-glow: rgba(0, 240, 255, 0.35);
            --border-blue: rgba(0, 82, 255, 0.45);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --shadow-neon: 0 0 24px rgba(0, 240, 255, 0.25);
            --shadow-glow: 0 0 40px rgba(0, 82, 255, 0.35);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --radius-full: 999px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-xxl: 80px;
            --font-heading: 'Be Vietnam Pro', sans-serif;
            --font-body: 'Inter', sans-serif;
            --transition: all 0.32s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            margin: 0;
            padding: 0;
            padding-top: 76px;
            background: var(--bg-deep);
            color: var(--text-white);
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.65;
            overflow-x: hidden;
            position: relative;
            background-image: 
                radial-gradient(ellipse at top left, rgba(0, 82, 255, 0.12), transparent 55%),
                radial-gradient(ellipse at bottom right, rgba(0, 240, 255, 0.08), transparent 50%),
                radial-gradient(ellipse at center, rgba(13, 17, 30, 0.6), transparent 70%);
            background-attachment: fixed;
        }

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

        a {
            color: var(--neon-cyan);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--text-white);
            text-decoration: none;
        }
        a:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 2px;
        }

        .container {
            max-width: 1240px;
            padding-left: var(--spacing-sm);
            padding-right: var(--spacing-sm);
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 800;
            letter-spacing: -0.01em;
            line-height: 1.25;
            margin-bottom: 0;
        }

        /* ============ HEADER / NAVBAR ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--glass-border);
            padding: 10px 0;
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
            border-bottom-color: var(--border-glow);
        }
        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.15rem;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .navbar-brand .brand-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: linear-gradient(145deg, var(--electric-blue), var(--neon-cyan));
            border-radius: 10px;
            font-size: 16px;
            font-weight: 900;
            color: #fff;
            box-shadow: var(--shadow-neon);
        }
        .navbar-brand .brand-text {
            background: linear-gradient(135deg, #fff 40%, var(--neon-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-size: 1.05rem;
        }
        .navbar-brand:hover {
            color: var(--text-white);
        }
        .navbar-brand:hover .brand-badge {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.5);
            transform: scale(1.05);
        }
        .navbar-nav {
            gap: 4px;
        }
        .navbar-nav .nav-link {
            color: var(--text-silver);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.92rem;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            position: relative;
            letter-spacing: 0.01em;
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.06);
        }
        .navbar-nav .nav-link.active {
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.08);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.12);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--neon-cyan);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-white);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 9px 20px;
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: var(--transition);
            letter-spacing: 0.01em;
        }
        .btn-login:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--electric-blue), var(--neon-cyan));
            border: none;
            color: #fff;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 0.9rem;
            padding: 9px 22px;
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: var(--transition);
            letter-spacing: 0.01em;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.35);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-signup:hover {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }
        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 6px 10px;
            font-size: 1.2rem;
            color: var(--text-white);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.3);
            border-color: var(--neon-cyan);
        }

        /* ============ HERO ============ */
        .hero-subpage {
            position: relative;
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            overflow: hidden;
            background-image: 
                linear-gradient(180deg, rgba(8,9,15,0.85) 0%, rgba(8,9,15,0.95) 100%),
                url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--glass-border);
        }
        .hero-subpage::before {
            content: '';
            position: absolute;
            top: -40%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.18), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-subpage .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--neon-cyan);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.82rem;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.03em;
        }
        .hero-subpage h1 {
            font-size: 2.4rem;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .hero-subpage h1 .highlight {
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subpage .hero-desc {
            font-size: 1.08rem;
            color: var(--text-silver);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: var(--spacing-md);
        }
        .hero-form-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
            border-left: 3px solid var(--neon-cyan);
        }
        .hero-form-card .form-label {
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--text-silver);
            margin-bottom: 6px;
        }
        .hero-form-card .form-control {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            color: var(--text-white);
            padding: 12px 16px;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .hero-form-card .form-control::placeholder {
            color: var(--text-muted);
        }
        .hero-form-card .form-control:focus {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--neon-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }
        .btn-cta-glow {
            background: linear-gradient(135deg, var(--electric-blue), var(--neon-cyan));
            border: none;
            color: #fff;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 13px 28px;
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 0 24px rgba(0, 82, 255, 0.45);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.02em;
            width: 100%;
            justify-content: center;
        }
        .btn-cta-glow:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ============ SECTION COMMON ============ */
        .section-pad {
            padding: var(--spacing-xl) 0;
        }
        .section-pad-sm {
            padding: var(--spacing-lg) 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 0.78rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--neon-cyan);
            margin-bottom: var(--spacing-sm);
        }
        .section-title {
            font-size: 1.9rem;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.015em;
            line-height: 1.25;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 700px;
        }

        /* ============ EXPERIENCE CARDS ============ */
        .exp-card {
            background: var(--bg-card);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .exp-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
            opacity: 0;
            transition: var(--transition);
        }
        .exp-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
        }
        .exp-card:hover::before {
            opacity: 1;
        }
        .exp-card .exp-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(145deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.15));
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--radius-sm);
            color: var(--neon-cyan);
            font-size: 1.3rem;
            margin-bottom: var(--spacing-sm);
        }
        .exp-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
            color: var(--text-white);
        }
        .exp-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ============ STRATEGY BLOCK ============ */
        .strategy-block {
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            position: relative;
            overflow: hidden;
        }
        .strategy-block::after {
            content: '';
            position: absolute;
            bottom: 0;
            right: 0;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .strategy-number {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 3rem;
            color: rgba(0, 240, 255, 0.15);
            line-height: 1;
            display: block;
            margin-bottom: var(--spacing-xs);
        }
        .strategy-block h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
        }
        .strategy-block p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ============ TRUST / STATS ============ */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }
        .stat-item {
            text-align: center;
            padding: var(--spacing-md) var(--spacing-sm);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: var(--border-glow);
            background: rgba(255, 255, 255, 0.05);
        }
        .stat-number {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.7rem;
            color: var(--neon-cyan);
            display: block;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ============ FAQ ============ */
        .faq-section .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: var(--spacing-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-section .accordion-item:hover {
            border-color: var(--border-glow);
        }
        .faq-section .accordion-button {
            background: transparent;
            color: var(--text-white);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 18px 20px;
            transition: var(--transition);
            border: none;
            box-shadow: none;
        }
        .faq-section .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.06);
            color: var(--neon-cyan);
        }
        .faq-section .accordion-button::after {
            filter: invert(1);
        }
        .faq-section .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2);
            border: none;
        }
        .faq-section .accordion-body {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.7;
            padding: 0 20px 18px 20px;
        }

        /* ============ CTA BANNER ============ */
        .cta-banner {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.1));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-banner h2 {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            position: relative;
            z-index: 2;
        }
        .cta-banner p {
            color: var(--text-silver);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto var(--spacing-md);
            position: relative;
            z-index: 2;
        }
        .cta-banner .btn-cta-glow {
            width: auto;
            display: inline-flex;
            padding: 14px 36px;
            font-size: 1rem;
            position: relative;
            z-index: 2;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: rgba(8, 9, 15, 0.92);
            border-top: 1px solid var(--glass-border);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: var(--spacing-lg);
            position: relative;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--electric-blue), transparent);
        }
        .footer-brand {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.1rem;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.01em;
        }
        .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: rgba(255, 0, 127, 0.15);
            border: 2px solid var(--hot-pink);
            border-radius: 50%;
            font-weight: 900;
            font-size: 0.75rem;
            color: var(--hot-pink);
            flex-shrink: 0;
        }
        .payment-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: var(--spacing-sm);
        }
        .payment-badge {
            display: inline-flex;
            align-items: center;
            font-size: 0.75rem;
            font-weight: 600;
            font-family: var(--font-heading);
            color: var(--text-silver);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-full);
            padding: 5px 14px;
            letter-spacing: 0.03em;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xs);
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover {
            color: var(--neon-cyan);
        }
        .footer-copyright {
            margin-top: var(--spacing-lg);
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* ============ FAB ============ */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1060;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--neon-cyan);
            font-size: 1.4rem;
            cursor: pointer;
            transition: var(--transition);
            opacity: 0.6;
            position: relative;
            border-image: linear-gradient(135deg, var(--neon-green), var(--electric-blue)) 1;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
            text-decoration: none;
        }
        .fab-support::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--neon-green), var(--electric-blue));
            z-index: -1;
            opacity: 0.6;
        }
        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
            color: var(--neon-cyan);
        }
        .fab-support:active {
            transform: scale(0.95);
            border-color: var(--hot-pink);
            color: var(--hot-pink);
        }
        .fab-support .notification-dot {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: var(--hot-pink);
            border-radius: 50%;
            border: 2px solid var(--bg-deep);
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { transform: scale(1); opacity: 1; }
            50% { transform: scale(1.3); opacity: 0.7; }
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .hero-subpage h1 {
                font-size: 2rem;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-sm);
            }
            .section-title {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-top: 66px;
            }
            .navbar-brand {
                font-size: 1rem;
            }
            .navbar-brand .brand-text {
                font-size: 0.95rem;
            }
            .nav-actions {
                gap: 6px;
            }
            .btn-login {
                padding: 7px 14px;
                font-size: 0.8rem;
            }
            .btn-signup {
                padding: 7px 16px;
                font-size: 0.8rem;
            }
            .hero-subpage {
                padding: var(--spacing-lg) 0 var(--spacing-md);
            }
            .hero-subpage h1 {
                font-size: 1.7rem;
            }
            .hero-subpage .hero-desc {
                font-size: 0.95rem;
            }
            .section-pad {
                padding: var(--spacing-lg) 0;
            }
            .section-title {
                font-size: 1.45rem;
            }
            .exp-card {
                padding: var(--spacing-sm);
            }
            .strategy-block {
                padding: var(--spacing-sm);
            }
            .strategy-number {
                font-size: 2rem;
            }
            .cta-banner h2 {
                font-size: 1.4rem;
            }
            .cta-banner {
                padding: var(--spacing-md) var(--spacing-sm);
            }
            .fab-support {
                left: 12px;
                bottom: 80px;
                width: 46px;
                height: 46px;
                font-size: 1.2rem;
            }
        }
        @media (max-width: 520px) {
            .hero-subpage h1 {
                font-size: 1.4rem;
            }
            .hero-subpage .hero-desc {
                font-size: 0.88rem;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-xs);
            }
            .stat-number {
                font-size: 1.3rem;
            }
            .stat-label {
                font-size: 0.75rem;
            }
            .section-title {
                font-size: 1.25rem;
            }
            .exp-card h3 {
                font-size: 1rem;
            }
            .btn-cta-glow {
                padding: 11px 20px;
                font-size: 0.85rem;
            }
            .footer-links {
                gap: 6px;
            }
            .payment-badge {
                font-size: 0.65rem;
                padding: 4px 10px;
            }
        }

/* roulang page: category1 */
/* ============ DESIGN SYSTEM ============ */
        :root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-navy-light: #151B2E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --bg-card-hover: rgba(21, 27, 46, 0.88);
            --electric-blue: #0052FF;
            --neon-cyan: #00F0FF;
            --neon-green: #00E676;
            --hot-pink: #FF007F;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8A94A6;
            --border-glow: rgba(0, 240, 255, 0.35);
            --border-blue: rgba(0, 82, 255, 0.45);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --shadow-neon: 0 0 24px rgba(0, 240, 255, 0.25);
            --shadow-glow: 0 0 40px rgba(0, 82, 255, 0.35);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --radius-full: 999px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-xxl: 80px;
            --font-heading: 'Be Vietnam Pro', sans-serif;
            --font-body: 'Inter', sans-serif;
            --transition: all 0.32s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ============ BASE & RESET ============ */
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            scroll-padding-top: 80px;
        }
        body {
            margin: 0;
            padding: 0;
            background: var(--bg-deep);
            color: var(--text-white);
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.65;
            overflow-x: hidden;
            position: relative;
            background-image:
                radial-gradient(ellipse at top left, rgba(0, 82, 255, 0.12), transparent 55%),
                radial-gradient(ellipse at bottom right, rgba(0, 240, 255, 0.08), transparent 50%),
                radial-gradient(ellipse at center, rgba(13, 17, 30, 0.6), transparent 70%);
            background-attachment: fixed;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--neon-cyan);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--text-white);
            text-decoration: none;
        }
        a:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 2px;
        }
        .container {
            max-width: 1240px;
            padding-left: var(--spacing-sm);
            padding-right: var(--spacing-sm);
        }

        /* ============ HEADER / NAVBAR ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--glass-border);
            padding: 10px 0;
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
            border-bottom-color: var(--border-glow);
        }
        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.15rem;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .navbar-brand .brand-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: linear-gradient(145deg, var(--electric-blue), var(--neon-cyan));
            border-radius: 10px;
            font-size: 16px;
            font-weight: 900;
            color: #fff;
            box-shadow: var(--shadow-neon);
            transition: var(--transition);
        }
        .navbar-brand .brand-text {
            background: linear-gradient(135deg, #fff 40%, var(--neon-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-size: 1.05rem;
        }
        .navbar-brand:hover {
            color: var(--text-white);
        }
        .navbar-brand:hover .brand-badge {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.5);
            transform: scale(1.05);
        }
        .navbar-toggler {
            border: 1px solid var(--glass-border);
            border-radius: 8px;
            padding: 6px 10px;
            transition: var(--transition);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.25);
        }
        .navbar-nav {
            gap: 4px;
        }
        .navbar-nav .nav-link {
            color: var(--text-silver);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.92rem;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            position: relative;
            letter-spacing: 0.01em;
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.06);
        }
        .navbar-nav .nav-link.active {
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.08);
            box-shadow: inset 0 0 0 1px var(--border-glow);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .btn-login {
            background: transparent;
            border: none;
            color: var(--text-silver);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-login:hover {
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.06);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--electric-blue), var(--neon-cyan));
            color: #fff;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 0.9rem;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            border: none;
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.35);
            display: inline-block;
            transition: var(--transition);
        }
        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-signup:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(0, 82, 255, 0.3);
        }

        /* ============ HERO ============ */
        .category-hero {
            position: relative;
            padding: 150px 0 80px;
            overflow: hidden;
            background: linear-gradient(135deg, rgba(8, 9, 15, 0.96), rgba(13, 17, 30, 0.92));
        }
        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: radial-gradient(circle at 15% 30%, rgba(0, 240, 255, 0.09), transparent 45%),
                radial-gradient(circle at 85% 40%, rgba(0, 82, 255, 0.14), transparent 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);
            color: var(--neon-cyan);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
        }
        .hero-title {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: clamp(2rem, 5vw, 3.2rem);
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-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: 680px;
            line-height: 1.6;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-primary-cta {
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-blue));
            color: #fff;
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: var(--radius-full);
            border: none;
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.35);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.01em;
        }
        .btn-primary-cta:hover {
            box-shadow: 0 12px 40px rgba(0, 240, 255, 0.5);
            transform: translateY(-3px);
            color: #fff;
        }
        .btn-primary-cta:active {
            transform: translateY(0);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
        }
        .btn-outline-cta {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--glass-border);
            color: var(--text-white);
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: var(--radius-full);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-outline-cta:hover {
            border-color: var(--border-glow);
            background: rgba(0, 240, 255, 0.08);
            color: var(--text-white);
            transform: translateY(-3px);
        }
        .hero-visual {
            background: linear-gradient(145deg, var(--bg-card), var(--bg-card-hover));
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-xl);
            padding: 24px;
            box-shadow: var(--shadow-card), inset 0 0 40px rgba(0, 240, 255, 0.04);
            position: relative;
            overflow: hidden;
        }
        .hero-visual img {
            border-radius: var(--radius-lg);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/10;
        }
        .hero-visual .overlay-tag {
            position: absolute;
            bottom: 32px;
            left: 32px;
            right: 32px;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .hero-visual .overlay-tag .icon-lg {
            width: 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-blue));
            border-radius: 12px;
            font-size: 20px;
            color: #fff;
        }
        .hero-visual .overlay-tag .tag-text {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.05rem;
            color: #fff;
            margin-bottom: 2px;
        }
        .hero-visual .overlay-tag .tag-sub {
            font-size: 0.8rem;
            color: var(--text-silver);
            margin: 0;
        }

        /* ============ SECTION GENERIC ============ */
        .section-block {
            padding: var(--spacing-xl) 0;
            position: relative;
        }
        .section-block.alternate {
            background: rgba(13, 17, 30, 0.55);
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--neon-cyan);
            margin-bottom: 12px;
        }
        .section-title {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
            max-width: 700px;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-silver);
            max-width: 760px;
            margin-bottom: 28px;
            line-height: 1.6;
        }

        /* ============ CARD RANKING ============ */
        .ranking-container {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .ranking-item {
            background: linear-gradient(145deg, var(--bg-card), var(--bg-card-hover));
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 22px 26px;
            display: flex;
            align-items: flex-start;
            gap: 20px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .ranking-item::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--neon-cyan), var(--electric-blue));
            border-radius: 4px 0 0 4px;
        }
        .ranking-item:hover {
            transform: translateY(-4px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-neon), var(--shadow-card);
        }
        .rank-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-glow);
            border-radius: 12px;
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.25rem;
            color: var(--neon-cyan);
            flex-shrink: 0;
        }
        .rank-content {
            flex: 1;
        }
        .rank-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
        }
        .rank-title {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-white);
            margin-bottom: 0;
        }
        .rank-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            background: rgba(0, 230, 118, 0.12);
            border: 1px solid rgba(0, 230, 118, 0.25);
            color: var(--neon-green);
        }
        .rank-badge.hot {
            background: rgba(255, 0, 127, 0.12);
            border-color: rgba(255, 0, 127, 0.3);
            color: #ff8ac2;
        }
        .rank-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .rank-features {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            list-style: none;
            padding: 0;
            margin: 0 0 14px;
        }
        .rank-features li {
            font-size: 0.8rem;
            color: var(--text-silver);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-full);
            padding: 4px 12px;
        }
        .rank-features li i {
            color: var(--neon-cyan);
            margin-right: 6px;
        }
        .rank-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--neon-cyan);
        }
        .rank-link:hover {
            color: #fff;
            gap: 12px;
        }

        /* ============ STEP SECTION ============ */
        .step-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }
        .step-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--electric-blue), var(--neon-cyan));
            border-radius: 10px;
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 16px;
        }
        .step-card h3 {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--text-white);
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ============ BOTTOM FIXED BAR ============ */
        .bottom-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            background: rgba(8, 9, 15, 0.9);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid var(--border-glow);
            padding: 12px 0;
            box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.5);
        }
        .bottom-cta-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .bottom-cta-text {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .bottom-cta-text .icon {
            color: var(--neon-cyan);
            font-size: 1.2rem;
        }
        .bottom-cta-text .label {
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .bottom-cta-text .strong {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 0.95rem;
            color: var(--text-white);
        }
        .btn-bottom-cta {
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-blue));
            color: #fff;
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 0.9rem;
            padding: 12px 26px;
            border-radius: var(--radius-full);
            border: none;
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.35);
            transition: var(--transition);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-bottom-cta:hover {
            box-shadow: 0 12px 36px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            transition: var(--transition);
            overflow: hidden;
        }
        .faq-item.open {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-neon);
        }
        .faq-question {
            padding: 18px 22px;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            width: 100%;
            text-align: left;
        }
        .faq-question .fa-chevron-down {
            transition: var(--transition);
            color: var(--neon-cyan);
        }
        .faq-item.open .fa-chevron-down {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer p {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--text-silver);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ============ FLOATING ACTION BUTTON ============ */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            background: linear-gradient(145deg, #0D111E, #08090F);
            border: 1px solid var(--border-glow);
            border-radius: 16px;
            color: var(--neon-cyan);
            font-size: 1.3rem;
            box-shadow: 0 4px 20px rgba(0, 240, 255, 0.3);
            opacity: 0.65;
            transition: var(--transition);
            cursor: pointer;
        }
        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.5);
        }
        .fab-support:active {
            transform: scale(0.95);
        }
        .fab-support .notif-dot {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 12px;
            height: 12px;
            background: var(--hot-pink);
            border-radius: 50%;
            border: 2px solid var(--bg-deep);
            animation: neon-blink 1.5s infinite;
        }
        @keyframes neon-blink {
            0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--hot-pink); }
            50% { opacity: 0.5; box-shadow: 0 0 2px rgba(255, 0, 127, 0.3); }
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: rgba(8, 9, 15, 0.92);
            border-top: 1px solid var(--glass-border);
            padding: var(--spacing-lg) 0 var(--spacing-md);
            margin-bottom: 60px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #D32F2F, #B71C1C);
            color: #fff;
            font-weight: 900;
            font-size: 0.8rem;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .payment-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }
        .payment-badge {
            display: inline-flex;
            align-items: center;
            padding: 5px 12px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--text-silver);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-full);
            letter-spacing: 0.02em;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: var(--text-silver);
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--neon-cyan);
            padding-left: 4px;
        }
        .footer-links a i {
            font-size: 0.7rem;
            color: var(--neon-cyan);
        }
        .footer-copyright {
            border-top: 1px solid var(--glass-border);
            margin-top: var(--spacing-md);
            padding-top: var(--spacing-md);
            text-align: center;
            font-size: 0.88rem;
            color: var(--text-silver);
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 991px) {
            .category-hero {
                padding: 130px 0 60px;
            }
            .nav-actions {
                margin-top: 10px;
                padding-top: 10px;
                border-top: 1px solid var(--glass-border);
                width: 100%;
                justify-content: space-between;
            }
            .navbar-nav {
                padding: 12px 0;
            }
            .hero-visual {
                margin-top: 32px;
            }
            .bottom-cta-content {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .btn-bottom-cta {
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-block {
                padding: var(--spacing-lg) 0;
            }
            .category-hero {
                padding: 120px 0 50px;
            }
            .ranking-item {
                padding: 18px 16px;
                gap: 14px;
            }
            .rank-number {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
            .hero-visual {
                padding: 16px;
            }
            .hero-visual .overlay-tag {
                padding: 12px 14px;
                bottom: 24px;
                left: 24px;
                right: 24px;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.85rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary-cta,
            .btn-outline-cta {
                width: 100%;
                justify-content: center;
            }
            .ranking-header {
                flex-wrap: nowrap;
                overflow-x: auto;
            }
            .fab-support {
                left: 10px;
                bottom: 86px;
                width: 46px;
                height: 46px;
                font-size: 1.1rem;
                border-radius: 12px;
            }
            .bottom-cta-bar {
                padding: 10px 0;
            }
            .site-footer {
                margin-bottom: 54px;
            }
        }