/* roulang page: index */
:root {
            --bg-primary: #0B1A30;
            --bg-secondary: #0F0C20;
            --bg-card: rgba(13, 22, 40, 0.85);
            --accent-primary: #00F0FF;
            --accent-secondary: #CCFF00;
            --accent-warm: #FF6B6B;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #6C757D;
            --border-color: rgba(0, 240, 255, 0.25);
            --border-hover: rgba(0, 240, 255, 0.6);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-neon: 0 0 18px rgba(0, 240, 255, 0.35);
            --shadow-neon-strong: 0 0 28px rgba(0, 240, 255, 0.55);
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.45);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 32px;
            --spacing-lg: 56px;
            --spacing-xl: 80px;
            --font-family: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-family);
            background: radial-gradient(ellipse at 30% 20%, #0F1B2E 0%, #0B1A30 45%, #0F0C20 100%);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--accent-primary); text-decoration: none; transition: color var(--transition-fast); }
        a:hover { color: var(--accent-secondary); }
        a:focus-visible, button:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        img { max-width: 100%; height: auto; display: block; }
        .container-custom { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 24px; }
        .section-padding { padding: var(--spacing-xl) 0; }
        .section-padding-sm { padding: var(--spacing-lg) 0; }
        .text-gradient-cyan { background: linear-gradient(135deg, #00F0FF 0%, #CCFF00 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
        .badge-neon { display: inline-flex; align-items: center; gap: 6px; padding: 5px 14px; background: rgba(0, 240, 255, 0.12); border: 1px solid var(--border-color); border-radius: 50px; font-size: 0.82rem; font-weight: 600; color: var(--accent-primary); letter-spacing: 0.03em; }
        .badge-live { background: rgba(204, 255, 0, 0.15); border-color: rgba(204, 255, 0, 0.4); color: var(--accent-secondary); }
        .btn-neon-primary {
            background: linear-gradient(135deg, #00F0FF 0%, #00C2D4 100%);
            border: none;
            color: #0B1A30;
            font-weight: 700;
            padding: 12px 28px;
            border-radius: 50px;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            box-shadow: 0 6px 22px rgba(0, 240, 255, 0.3);
            position: relative;
            overflow: hidden;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            justify-content: center;
        }
        .btn-neon-primary:hover {
            background: linear-gradient(135deg, #00F0FF 0%, #CCFF00 100%);
            color: #0B1A30;
            transform: translateY(-2px);
            box-shadow: var(--shadow-neon-strong);
        }
        .btn-neon-primary:active { transform: translateY(0) scale(0.98); }
        .btn-neon-outline {
            background: transparent;
            border: 2px solid var(--accent-primary);
            color: var(--accent-primary);
            font-weight: 600;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            justify-content: center;
        }
        .btn-neon-outline:hover {
            background: var(--accent-primary);
            color: #0B1A30;
            box-shadow: var(--shadow-neon);
            transform: translateY(-2px);
        }
        .btn-neon-outline:active { transform: translateY(0) scale(0.98); }
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
        }
        .glass-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
        }
        .section-title { font-size: clamp(1.7rem, 3.5vw, 2.6rem); font-weight: 800; line-height: 1.2; margin-bottom: 12px; }
        .section-subtitle { font-size: 1.05rem; color: var(--text-secondary); max-width: 720px; line-height: 1.6; }
        .divider-glow { height: 3px; width: 64px; background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary)); border-radius: 4px; margin: 18px 0 28px; }
        .text-left-aligned { text-align: left; }

        /* Header */
        .site-header {
            background: rgba(11, 26, 48, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 0;
            transition: all var(--transition-base);
        }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; gap: 20px; }
        .brand-logo { font-size: 1.35rem; font-weight: 800; color: var(--text-primary); letter-spacing: -0.01em; white-space: nowrap; display: flex; align-items: center; gap: 10px; }
        .brand-logo:hover { color: var(--accent-primary); }
        .brand-logo i { color: var(--accent-primary); font-size: 1.6rem; }
        .nav-links { display: flex; align-items: center; gap: 8px; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
        .nav-links li a {
            color: var(--text-secondary);
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.92rem;
            letter-spacing: 0.01em;
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: inline-block;
        }
        .nav-links li a:hover { color: var(--text-primary); background: rgba(0, 240, 255, 0.1); }
        .nav-links li a.active { color: var(--accent-primary); background: rgba(0, 240, 255, 0.12); }
        .nav-auth-btns { display: flex; align-items: center; gap: 12px; }
        .btn-login-text { background: transparent; border: none; color: var(--text-primary); font-weight: 600; padding: 8px 16px; font-size: 0.9rem; cursor: pointer; transition: color var(--transition-fast); }
        .btn-login-text:hover { color: var(--accent-primary); }
        .btn-signup-solid {
            background: linear-gradient(135deg, #CCFF00 0%, #00F0FF 100%);
            border: none;
            color: #0B1A30;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(204, 255, 0, 0.25);
            white-space: nowrap;
        }
        .btn-signup-solid:hover { transform: translateY(-2px); box-shadow: var(--shadow-neon-strong); color: #0B1A30; }
        .mobile-toggle { display: none; background: transparent; border: 2px solid var(--border-color); color: var(--accent-primary); font-size: 1.4rem; width: 44px; height: 44px; border-radius: 10px; cursor: pointer; transition: all var(--transition-fast); align-items: center; justify-content: center; }
        .mobile-toggle:hover { border-color: var(--accent-primary); background: rgba(0, 240, 255, 0.1); }
        .mobile-menu { display: none; background: rgba(11, 26, 48, 0.98); padding: 16px 24px; border-top: 1px solid var(--border-color); }
        .mobile-menu a { display: block; padding: 12px 8px; color: var(--text-secondary); font-weight: 600; border-bottom: 1px solid rgba(255,255,255,0.06); }
        .mobile-menu a:hover, .mobile-menu a.active { color: var(--accent-primary); }
        .mobile-auth { display: flex; gap: 12px; padding: 16px 0 8px; }

        /* Hero */
        .hero-section {
            position: relative;
            background-image: linear-gradient(rgba(11, 26, 48, 0.88), rgba(15, 12, 32, 0.92)), url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            min-height: 620px;
            display: flex;
            align-items: center;
        }
        .hero-content { max-width: 680px; }
        .hero-title { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 900; line-height: 1.12; letter-spacing: -0.02em; margin-bottom: 20px; }
        .hero-desc { font-size: 1.1rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 32px; max-width: 600px; }
        .hero-cta-group { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 36px; }
        .hero-stats { display: flex; flex-wrap: wrap; gap: 28px; }
        .stat-item { text-align: left; }
        .stat-number { font-size: 1.8rem; font-weight: 800; color: var(--accent-primary); line-height: 1.1; }
        .stat-label { font-size: 0.85rem; color: var(--text-secondary); }
        .hero-visual {
            background: rgba(13, 22, 40, 0.7);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card);
        }
        .hero-visual .visual-badge { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
        .visual-badge .dot-live { width: 10px; height: 10px; background: var(--accent-secondary); border-radius: 50%; animation: pulse-dot 1.4s infinite; }
        @keyframes pulse-dot { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
        .visual-list { list-style: none; padding: 0; margin: 0; }
        .visual-list li { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,0.07); color: var(--text-secondary); }
        .visual-list li:last-child { border-bottom: none; }
        .visual-list li i { color: var(--accent-primary); font-size: 1.2rem; width: 24px; text-align: center; }

        /* Feature Highlights */
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-item { padding: 28px 24px; text-align: left; }
        .feature-item i { font-size: 2rem; color: var(--accent-primary); margin-bottom: 16px; display: block; }
        .feature-item h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
        .feature-item p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.6; margin: 0; }

        /* Promo Wall */
        .promo-wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .promo-card { overflow: hidden; border-radius: var(--radius-md); background: var(--bg-card); border: 1px solid var(--border-color); transition: all var(--transition-base); }
        .promo-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-neon); transform: translateY(-4px); }
        .promo-card img { width: 100%; height: 180px; object-fit: cover; }
        .promo-body { padding: 20px; }
        .promo-body h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
        .promo-body p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; line-height: 1.5; }

        /* Countdown CTA */
        .countdown-bar { background: linear-gradient(135deg, rgba(0,240,255,0.08) 0%, rgba(204,255,0,0.08) 100%); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 32px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
        .countdown-timer { display: flex; gap: 14px; }
        .timer-block { background: rgba(0, 0, 0, 0.4); border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 12px 16px; text-align: center; min-width: 64px; }
        .timer-number { font-size: 1.6rem; font-weight: 800; color: var(--accent-primary); line-height: 1; }
        .timer-label { font-size: 0.72rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; }

        /* IP Highlights */
        .ip-slider { display: flex; gap: 22px; overflow-x: auto; padding-bottom: 16px; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; }
        .ip-slider::-webkit-scrollbar { height: 6px; }
        .ip-slider::-webkit-scrollbar-track { background: rgba(255,255,255,0.05); border-radius: 4px; }
        .ip-slider::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 4px; }
        .ip-card { min-width: 260px; scroll-snap-align: start; padding: 24px; border-radius: var(--radius-md); background: var(--bg-card); border: 1px solid var(--border-color); transition: all var(--transition-base); flex-shrink: 0; }
        .ip-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-neon); }
        .ip-card i { font-size: 2.2rem; color: var(--accent-secondary); margin-bottom: 12px; }
        .ip-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
        .ip-card p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.5; margin: 0; }

        /* Trust Bar */
        .trust-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 32px 0; }
        .trust-item { display: flex; align-items: center; gap: 14px; padding: 18px; border-radius: var(--radius-md); background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); transition: all var(--transition-fast); }
        .trust-item:hover { border-color: var(--border-color); background: rgba(0, 240, 255, 0.05); }
        .trust-item i { font-size: 1.8rem; color: var(--accent-primary); }
        .trust-item span { font-weight: 600; font-size: 0.92rem; color: var(--text-secondary); }

        /* News List */
        .news-layout { display: grid; grid-template-columns: 1.4fr 1fr; gap: 36px; align-items: start; }
        .news-list { list-style: none; padding: 0; margin: 0; }
        .news-list li { padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,0.08); transition: all var(--transition-fast); }
        .news-list li:hover { padding-left: 8px; }
        .news-list li a { color: var(--text-primary); font-weight: 600; font-size: 1.05rem; display: block; margin-bottom: 6px; line-height: 1.4; }
        .news-list li a:hover { color: var(--accent-primary); }
        .news-meta { font-size: 0.82rem; color: var(--text-muted); display: flex; gap: 16px; }
        .news-meta i { margin-right: 4px; color: var(--accent-primary); }
        .news-sidebar { padding: 24px; border-radius: var(--radius-md); background: var(--bg-card); border: 1px solid var(--border-color); }
        .news-sidebar h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 16px; color: var(--accent-primary); }
        .sidebar-list { list-style: none; padding: 0; margin: 0; }
        .sidebar-list li { padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list li a { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.4; }
        .sidebar-list li a:hover { color: var(--accent-primary); }

        /* FAQ */
        .faq-list { max-width: 860px; }
        .accordion-button { background: rgba(13,22,40,0.9); color: var(--text-primary); font-weight: 600; padding: 20px 24px; border: 1px solid var(--border-color); border-radius: var(--radius-sm) !important; }
        .accordion-button:not(.collapsed) { background: rgba(0, 240, 255, 0.08); color: var(--accent-primary); box-shadow: none; }
        .accordion-button:focus { box-shadow: 0 0 0 2px var(--accent-primary); }
        .accordion-button::after { filter: brightness(0) invert(1); }
        .accordion-item { background: transparent; border: 1px solid var(--border-color); border-radius: var(--radius-sm); margin-bottom: 12px; }
        .accordion-body { color: var(--text-secondary); padding: 18px 24px; line-height: 1.7; }

        /* CTA Section */
        .cta-section { background: linear-gradient(135deg, rgba(0, 240, 255, 0.06) 0%, rgba(204, 255, 0, 0.06) 100%); border-radius: var(--radius-lg); padding: 48px 40px; text-align: center; }
        .cta-section h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; margin-bottom: 16px; }
        .cta-section p { color: var(--text-secondary); max-width: 560px; margin: 0 auto 28px; line-height: 1.7; }

        /* Footer */
        .site-footer { background: #0A1524; border-top: 1px solid rgba(0, 240, 255, 0.2); padding: 48px 0 24px; margin-top: var(--spacing-xl); }
        .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 36px; }
        .footer-brand p { color: var(--text-secondary); font-size: 0.9rem; margin-top: 12px; line-height: 1.6; }
        .footer-col h5 { font-size: 0.95rem; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
        .footer-col ul { list-style: none; padding: 0; margin: 0; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { color: var(--text-secondary); font-size: 0.88rem; transition: color var(--transition-fast); }
        .footer-col ul li a:hover { color: var(--accent-primary); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 20px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; font-size: 0.82rem; color: var(--text-muted); }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--accent-primary); }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 1060;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid var(--accent-primary);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-base);
            opacity: 0.6;
            animation: fab-breathe 3s infinite;
        }
        .fab-left i { color: var(--accent-primary); font-size: 1.5rem; }
        .fab-left:hover { opacity: 1; transform: scale(1.1); box-shadow: 0 0 28px rgba(0, 240, 255, 0.8); }
        .fab-left:active { transform: scale(0.95); }
        .fab-notification { position: absolute; top: 4px; right: 4px; width: 12px; height: 12px; background: #FF007F; border-radius: 50%; border: 2px solid #0B1A30; animation: blink-neon 1.2s infinite; }
        @keyframes fab-breathe { 0%,100% { opacity: 0.6; } 50% { opacity: 0.9; } }
        @keyframes blink-neon { 0%,100% { opacity: 1; } 50% { opacity: 0.2; } }

        /* Bottom CTA */
        .bottom-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(11, 26, 48, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid var(--border-color);
            padding: 12px 24px;
            z-index: 1040;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
        }
        .bottom-cta-bar .cta-text { color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; }
        .bottom-cta-bar .btn-neon-primary { padding: 10px 24px; font-size: 0.9rem; }

        /* Responsive */
        @media (max-width: 1024px) {
            .feature-grid, .promo-wall { grid-template-columns: repeat(2, 1fr); }
            .trust-bar { grid-template-columns: repeat(2, 1fr); }
            .news-layout { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .hero-section { min-height: auto; padding: var(--spacing-lg) 0; }
        }
        @media (max-width: 768px) {
            .header-inner { height: auto; padding: 12px 0; flex-wrap: wrap; }
            .nav-links { display: none; }
            .mobile-toggle { display: flex; }
            .mobile-menu.active { display: block; }
            .nav-auth-btns { margin-left: auto; }
            .feature-grid, .promo-wall, .trust-bar { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .hero-cta-group { flex-direction: column; align-items: stretch; }
            .hero-stats { gap: 20px; }
            .countdown-bar { flex-direction: column; text-align: center; }
            .countdown-timer { justify-content: center; }
            .cta-section { padding: 32px 20px; }
            .section-padding { padding: var(--spacing-lg) 0; }
            .bottom-cta-bar { flex-direction: column; text-align: center; padding: 12px 16px; gap: 10px; }
            .fab-left { bottom: 120px; left: 16px; width: 50px; height: 50px; }
        }
        @media (max-width: 520px) {
            .container-custom { padding: 0 16px; }
            .brand-logo { font-size: 1.1rem; }
            .brand-logo i { font-size: 1.3rem; }
            .hero-title { font-size: 1.9rem; }
            .hero-desc { font-size: 0.95rem; }
            .section-title { font-size: 1.5rem; }
            .btn-neon-primary, .btn-neon-outline { width: 100%; justify-content: center; }
            .stat-number { font-size: 1.5rem; }
            .ip-card { min-width: 220px; }
            .trust-item { flex-direction: column; text-align: center; gap: 8px; }
        }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --accent-blue-glow: rgba(0, 82, 255, 0.4);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: rgba(255, 255, 255, 0.12);
            --border-hover: rgba(0, 240, 255, 0.6);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-blue-glow: 0 0 20px rgba(0, 82, 255, 0.5);
            --font-primary: 'Inter', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --font-size-xs: 0.75rem;
            --font-size-sm: 0.875rem;
            --font-size-base: 1rem;
            --font-size-md: 1.125rem;
            --font-size-lg: 1.25rem;
            --font-size-xl: 1.5rem;
            --font-size-2xl: 2rem;
            --font-size-3xl: 2.5rem;
            --font-size-4xl: 3rem;
            --font-weight-normal: 400;
            --font-weight-medium: 500;
            --font-weight-semibold: 600;
            --font-weight-bold: 700;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s ease;
            --header-height: 72px;
            --container-max: 1200px;
            --container-padding: 24px;
        }

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

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

        body {
            font-family: var(--font-primary);
            font-size: var(--font-size-base);
            font-weight: var(--font-weight-normal);
            line-height: 1.6;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image: radial-gradient(ellipse at 20% 0%, rgba(0, 82, 255, 0.08) 0%, transparent 55%),
                              radial-gradient(ellipse at 80% 100%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

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

        button {
            font-family: inherit;
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: var(--font-weight-bold);
            line-height: 1.25;
            margin: 0;
        }

        h1 {
            font-size: var(--font-size-4xl);
            letter-spacing: -0.02em;
            line-height: 1.15;
        }

        h2 {
            font-size: var(--font-size-3xl);
            letter-spacing: -0.01em;
            line-height: 1.2;
        }

        h3 {
            font-size: var(--font-size-xl);
            line-height: 1.3;
        }

        h4 {
            font-size: var(--font-size-lg);
            line-height: 1.35;
        }

        h5 {
            font-size: var(--font-size-md);
            line-height: 1.4;
        }

        p {
            line-height: 1.65;
            margin: 0;
        }

        .container-custom {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-padding);
            padding-right: var(--container-padding);
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            transition: all var(--transition-base);
        }

        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 24px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: var(--font-size-lg);
            font-weight: var(--font-weight-bold);
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
            transition: color var(--transition-fast);
        }

        .brand-logo i {
            font-size: 1.5rem;
            color: var(--accent-secondary);
            filter: drop-shadow(0 0 8px var(--accent-glow));
        }

        .brand-logo:hover {
            color: var(--accent-secondary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .nav-links li {
            position: relative;
        }

        .nav-links a {
            display: block;
            padding: 10px 16px;
            font-size: var(--font-size-sm);
            font-weight: var(--font-weight-medium);
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.1);
        }

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

        .btn-login-text {
            background: transparent;
            border: none;
            color: var(--text-secondary);
            font-size: var(--font-size-sm);
            font-weight: var(--font-weight-medium);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

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

        .btn-signup-solid {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            color: var(--text-primary);
            font-size: var(--font-size-sm);
            font-weight: var(--font-weight-semibold);
            padding: 10px 20px;
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
        }

        .btn-signup-solid:hover {
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
        }

        .btn-signup-solid:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(0, 240, 255, 0.3);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            font-size: 1.25rem;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
        }

        .mobile-toggle:hover {
            border-color: var(--border-hover);
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.06);
        }

        .mobile-menu {
            display: none;
            background: rgba(8, 9, 15, 0.98);
            border-top: 1px solid var(--border-color);
            padding: 16px 24px;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu a {
            padding: 12px 16px;
            font-size: var(--font-size-base);
            font-weight: var(--font-weight-medium);
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.08);
        }

        .mobile-auth {
            display: flex;
            gap: 10px;
            margin-top: 12px;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
        }

        .mobile-auth .btn-login-text,
        .mobile-auth .btn-signup-solid {
            flex: 1;
            text-align: center;
            padding: 12px;
        }

        /* ========== ARTICLE HERO ========== */
        .article-hero {
            padding-top: calc(var(--header-height) + 40px);
            padding-bottom: 48px;
            background-image: linear-gradient(180deg, rgba(8, 9, 15, 0.7) 0%, var(--bg-primary) 100%),
                              url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            position: relative;
            border-bottom: 1px solid var(--border-color);
        }

        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 60%;
            background: linear-gradient(180deg, transparent, var(--bg-primary));
            pointer-events: none;
        }

        .article-hero .container-custom {
            position: relative;
            z-index: 1;
        }

        .article-hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: var(--font-size-sm);
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .article-hero-breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .article-hero-breadcrumb a:hover {
            color: var(--accent-secondary);
        }

        .article-hero-breadcrumb .separator {
            color: var(--border-color);
        }

        .article-hero-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }

        .article-hero-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: var(--font-size-sm);
            color: var(--text-muted);
        }

        .article-hero-meta .meta-item i {
            color: var(--accent-secondary);
            font-size: 0.9rem;
        }

        .article-hero .article-title {
            font-size: var(--font-size-4xl);
            font-weight: var(--font-weight-bold);
            color: var(--text-primary);
            margin-bottom: 20px;
            line-height: 1.15;
            letter-spacing: -0.02em;
        }

        .article-hero .article-excerpt {
            font-size: var(--font-size-md);
            color: var(--text-secondary);
            max-width: 800px;
            line-height: 1.65;
        }

        /* ========== ARTICLE CONTENT ========== */
        .article-content-wrapper {
            padding: 48px 0 64px;
        }

        .article-content-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        .article-body {
            min-width: 0;
        }

        .article-body .article-featured-image {
            margin-bottom: 32px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }

        .article-body .article-featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .article-body .article-content {
            font-size: var(--font-size-base);
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .article-body .article-content h2 {
            font-size: var(--font-size-2xl);
            color: var(--text-primary);
            margin: 32px 0 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid rgba(0, 240, 255, 0.2);
        }

        .article-body .article-content h3 {
            font-size: var(--font-size-xl);
            color: var(--text-primary);
            margin: 28px 0 14px;
        }

        .article-body .article-content p {
            margin-bottom: 16px;
        }

        .article-body .article-content ul,
        .article-body .article-content ol {
            margin: 16px 0 20px 20px;
            padding-left: 0;
        }

        .article-body .article-content ul {
            list-style: none;
        }

        .article-body .article-content ul li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 10px;
            line-height: 1.65;
        }

        .article-body .article-content ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--accent-secondary);
            font-size: 0.85rem;
        }

        .article-body .article-content ol {
            list-style: decimal;
        }

        .article-body .article-content ol li {
            margin-bottom: 10px;
            line-height: 1.65;
            padding-left: 8px;
        }

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

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

        .article-body .article-content table {
            width: 100%;
            margin: 24px 0;
            border-collapse: collapse;
            font-size: var(--font-size-sm);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .article-body .article-content table th {
            background: rgba(0, 240, 255, 0.1);
            color: var(--text-primary);
            font-weight: var(--font-weight-semibold);
            text-align: left;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
        }

        .article-body .article-content table td {
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
        }

        .article-body .article-content table tr:hover td {
            background: rgba(0, 240, 255, 0.03);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }

        .article-not-found i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .article-not-found h2 {
            font-size: var(--font-size-2xl);
            color: var(--text-primary);
            margin-bottom: 12px;
        }

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

        .btn-primary-cta {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            color: var(--text-primary);
            font-size: var(--font-size-sm);
            font-weight: var(--font-weight-semibold);
            padding: 14px 28px;
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
            text-align: center;
        }

        .btn-primary-cta:hover {
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
            color: var(--text-primary);
        }

        .btn-primary-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(0, 240, 255, 0.3);
        }

        /* ========== ARTICLE SIDEBAR ========== */
        .article-sidebar {
            position: sticky;
            top: calc(var(--header-height) + 24px);
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: all var(--transition-base);
        }

        .sidebar-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-glow);
        }

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

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

        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
            font-size: var(--font-size-sm);
            transition: all var(--transition-fast);
            padding: 8px 10px;
            border-radius: var(--radius-sm);
        }

        .sidebar-list a:hover {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.06);
        }

        .sidebar-list a i {
            font-size: 0.85rem;
            color: var(--accent-secondary);
            flex-shrink: 0;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.1));
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
        }

        .sidebar-cta h4 {
            font-size: var(--font-size-md);
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .sidebar-cta p {
            font-size: var(--font-size-sm);
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .sidebar-cta .btn-primary-cta {
            width: 100%;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 64px 0;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.08), rgba(0, 240, 255, 0.06));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .cta-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .cta-card h2 {
            font-size: var(--font-size-2xl);
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .cta-card p {
            font-size: var(--font-size-md);
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.65;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-outline-cta {
            display: inline-block;
            background: transparent;
            border: 1px solid var(--border-hover);
            color: var(--accent-secondary);
            font-size: var(--font-size-sm);
            font-weight: var(--font-weight-semibold);
            padding: 14px 28px;
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            text-align: center;
        }

        .btn-outline-cta:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
            box-shadow: var(--shadow-glow);
        }

        /* ========== FAB ========== */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 2px solid var(--accent-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-secondary);
            font-size: 1.5rem;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            opacity: 0.6;
            animation: fabBreathing 3s ease-in-out infinite;
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.8);
            animation: none;
        }

        .fab-support:active {
            transform: scale(0.95);
            border-color: #FF007F;
            color: #FF007F;
            box-shadow: 0 0 20px rgba(255, 0, 127, 0.6);
        }

        .fab-support .notification-dot {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: notificationBlink 2s ease-in-out infinite;
        }

        @keyframes fabBreathing {
            0%, 100% { opacity: 0.6; }
            50% { opacity: 0.8; }
        }

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

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: var(--font-size-sm);
            line-height: 1.65;
            margin-bottom: 8px;
        }

        .badge-neon {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 12px;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-sm);
            color: var(--accent-secondary);
            font-size: var(--font-size-sm);
            font-weight: var(--font-weight-medium);
            white-space: nowrap;
        }

        .footer-col h5 {
            font-size: var(--font-size-sm);
            color: var(--text-primary);
            font-weight: var(--font-weight-semibold);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            color: var(--text-muted);
            font-size: var(--font-size-sm);
            transition: all var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--accent-secondary);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: var(--font-size-xs);
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --font-size-4xl: 2.5rem;
                --font-size-3xl: 2rem;
                --font-size-2xl: 1.75rem;
                --font-size-xl: 1.375rem;
            }

            .article-content-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --font-size-4xl: 2rem;
                --font-size-3xl: 1.75rem;
                --font-size-2xl: 1.5rem;
                --font-size-xl: 1.25rem;
                --font-size-lg: 1.125rem;
                --container-padding: 16px;
                --header-height: 64px;
            }

            .nav-links {
                display: none;
            }

            .nav-auth-btns .btn-login-text {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .mobile-menu {
                display: none;
            }

            .mobile-menu.active {
                display: flex;
            }

            .article-hero {
                padding-top: calc(var(--header-height) + 24px);
                padding-bottom: 32px;
            }

            .article-hero .article-title {
                font-size: var(--font-size-3xl);
            }

            .article-content-wrapper {
                padding: 32px 0 48px;
            }

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

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

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

            .cta-buttons .btn-primary-cta,
            .cta-buttons .btn-outline-cta {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }

            .fab-support {
                width: 48px;
                height: 48px;
                font-size: 1.25rem;
                left: 12px;
                bottom: 80px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --font-size-4xl: 1.75rem;
                --font-size-3xl: 1.5rem;
                --font-size-2xl: 1.375rem;
                --font-size-xl: 1.125rem;
                --font-size-md: 1rem;
                --font-size-base: 0.9375rem;
                --font-size-sm: 0.8125rem;
                --font-size-xs: 0.6875rem;
            }

            .article-hero-meta {
                gap: 10px;
            }

            .article-hero-meta .meta-item {
                font-size: var(--font-size-xs);
            }

            .article-body .article-content h2 {
                font-size: var(--font-size-xl);
            }

            .article-body .article-content h3 {
                font-size: var(--font-size-lg);
            }

            .article-body .article-content table {
                font-size: var(--font-size-xs);
            }

            .article-body .article-content table th,
            .article-body .article-content table td {
                padding: 8px 10px;
            }

            .nav-auth-btns .btn-signup-solid {
                padding: 8px 14px;
                font-size: var(--font-size-xs);
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8A94A6;
            --border-glow: rgba(0, 240, 255, 0.3);
            --border-subtle: rgba(255, 255, 255, 0.08);
            --card-bg: rgba(13, 17, 30, 0.7);
            --card-bg-solid: #0D111E;
            --glass-bg: rgba(8, 9, 15, 0.6);
            --btn-gradient: linear-gradient(135deg, #0052FF, #00F0FF);
            --btn-gradient-hover: linear-gradient(135deg, #0040CC, #00D0E0);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-primary: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-display: 'Be Vietnam Pro', 'Inter', 'Segoe UI', sans-serif;
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        
        body {
            font-family: var(--font-primary);
            background-color: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }
        
        button {
            cursor: pointer;
            font-family: inherit;
            transition: var(--transition-base);
        }
        
        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-base);
        }
        
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        
        .brand-logo {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.25rem;
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-primary);
            white-space: nowrap;
        }
        
        .brand-logo i {
            color: var(--accent-cyan);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
        }
        
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        
        .nav-links a {
            padding: 8px 16px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }
        
        .nav-links a.active {
            box-shadow: inset 0 0 0 1px rgba(0, 240, 255, 0.3);
        }
        
        .nav-auth-btns {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
        }
        
        .btn-login-text {
            background: transparent;
            border: none;
            color: var(--text-secondary);
            padding: 8px 16px;
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: 24px;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        
        .btn-login-text:hover {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }
        
        .btn-signup-solid {
            background: var(--btn-gradient);
            border: none;
            color: #FFFFFF;
            padding: 10px 24px;
            font-size: 0.9rem;
            font-weight: 600;
            border-radius: 24px;
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.4);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        
        .btn-signup-solid:hover {
            background: var(--btn-gradient-hover);
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
        }
        
        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            font-size: 1.25rem;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
        }
        
        .mobile-toggle:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        
        .mobile-menu {
            display: none;
            background: rgba(8, 9, 15, 0.98);
            backdrop-filter: blur(20px);
            border-top: 1px solid var(--border-subtle);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
        }
        
        .mobile-menu.active {
            display: flex;
        }
        
        .mobile-menu a {
            padding: 12px 16px;
            border-radius: 12px;
            color: var(--text-secondary);
            font-weight: 500;
            transition: var(--transition-base);
        }
        
        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
        }
        
        .mobile-auth {
            display: flex;
            gap: 8px;
            margin-top: 12px;
        }
        
        /* ========== HERO ========== */
        .hero-section {
            padding: 160px 0 80px;
            position: relative;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.08) 0%, transparent 60%);
            overflow: hidden;
        }
        
        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            padding: 8px 16px;
            border-radius: 24px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            margin-bottom: 20px;
            animation: pulseBadge 2s ease-in-out infinite;
        }
        
        @keyframes pulseBadge {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.7; }
        }
        
        .hero-title {
            font-family: var(--font-display);
            font-weight: 800;
            font-size: 3rem;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 580px;
            line-height: 1.7;
            margin-bottom: 32px;
        }
        
        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        
        .btn-primary-glow {
            background: var(--btn-gradient);
            border: none;
            color: #FFFFFF;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 28px;
            box-shadow: 0 4px 24px rgba(0, 82, 255, 0.5);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        
        .btn-primary-glow:hover {
            background: var(--btn-gradient-hover);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #FFFFFF;
        }
        
        .btn-secondary-outline {
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.4);
            color: var(--accent-cyan);
            padding: 14px 28px;
            font-size: 1rem;
            font-weight: 500;
            border-radius: 28px;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        
        .btn-secondary-outline:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-cyan);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
        }
        
        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }
        
        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        
        .hero-stat .stat-value {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--accent-cyan);
        }
        
        .hero-stat .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        
        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        
        .countdown-ring {
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: conic-gradient(var(--accent-cyan) 0%, var(--accent-blue) 65%, rgba(255, 255, 255, 0.05) 65%, rgba(255, 255, 255, 0.05) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            animation: spinRing 10s linear infinite;
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.2);
        }
        
        @keyframes spinRing {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }
        
        .countdown-inner {
            width: 270px;
            height: 270px;
            border-radius: 50%;
            background: var(--primary-bg);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 8px;
            animation: spinRingReverse 10s linear infinite;
            border: 2px solid rgba(0, 240, 255, 0.3);
        }
        
        @keyframes spinRingReverse {
            from { transform: rotate(360deg); }
            to { transform: rotate(0deg); }
        }
        
        .countdown-inner .time {
            font-family: var(--font-display);
            font-weight: 800;
            font-size: 2.5rem;
            color: var(--text-primary);
            line-height: 1;
        }
        
        .countdown-inner .label {
            font-size: 0.85rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.08em;
        }
        
        .countdown-inner .offer {
            font-size: 0.9rem;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-top: 8px;
        }
        
        /* ========== FEATURES ========== */
        .features-section {
            padding: 80px 0;
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        
        .section-heading {
            margin-bottom: 48px;
        }
        
        .section-heading .section-label {
            display: inline-block;
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            margin-bottom: 12px;
        }
        
        .section-heading h2 {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 2.25rem;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.25;
        }
        
        .section-heading p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 600px;
            line-height: 1.7;
        }
        
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        
        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--btn-gradient);
            opacity: 0;
            transition: var(--transition-base);
        }
        
        .feature-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 240, 255, 0.1);
            transform: translateY(-4px);
        }
        
        .feature-card:hover::before {
            opacity: 1;
        }
        
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            transition: var(--transition-base);
        }
        
        .feature-card:hover .feature-icon {
            background: rgba(0, 240, 255, 0.2);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }
        
        .feature-card h3 {
            font-family: var(--font-display);
            font-weight: 600;
            font-size: 1.15rem;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0;
        }
        
        /* ========== PROCESS / STEPS ========== */
        .process-section {
            padding: 80px 0;
            background: var(--primary-bg);
        }
        
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }
        
        .process-step {
            text-align: left;
            position: relative;
            padding-left: 16px;
        }
        
        .process-step::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
            border-radius: 1px;
        }
        
        .step-number {
            font-family: var(--font-display);
            font-weight: 800;
            font-size: 2.5rem;
            color: rgba(0, 240, 255, 0.2);
            line-height: 1;
            margin-bottom: 12px;
        }
        
        .process-step h4 {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        
        .process-step p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0;
        }
        
        /* ========== PAYMENT METHODS ========== */
        .payment-section {
            padding: 80px 0;
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        
        .payment-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 40px;
        }
        
        .payment-card {
            background: var(--card-bg-solid);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 24px 16px;
            text-align: center;
            transition: var(--transition-base);
        }
        
        .payment-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.1);
            transform: translateY(-2px);
        }
        
        .payment-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        
        .payment-card h5 {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        
        .payment-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin: 0;
        }
        
        /* ========== TESTIMONIALS / SOCIAL PROOF ========== */
        .testimonials-section {
            padding: 80px 0;
            background: var(--primary-bg);
        }
        
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        
        .testimonial-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition-base);
        }
        
        .testimonial-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        
        .testimonial-rating {
            color: #FFD700;
            margin-bottom: 12px;
            font-size: 0.85rem;
        }
        
        .testimonial-text {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 16px;
            font-style: italic;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--btn-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
        }
        
        .testimonial-name {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-primary);
        }
        
        .testimonial-role {
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        
        /* ========== FAQ ========== */
        .faq-section {
            padding: 80px 0;
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        
        .faq-list {
            max-width: 800px;
            margin-top: 40px;
        }
        
        .faq-item {
            background: var(--card-bg-solid);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            gap: 16px;
            transition: var(--transition-base);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
        }
        
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        
        .faq-question i {
            font-size: 0.8rem;
            color: var(--accent-cyan);
            transition: var(--transition-base);
        }
        
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        .faq-item.open .faq-answer {
            max-height: 500px;
        }
        
        .faq-answer p {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0;
        }
        
        /* ========== CTA ========== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(180deg, var(--primary-bg) 0%, rgba(0, 82, 255, 0.1) 100%);
            position: relative;
            overflow: hidden;
        }
        
        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        
        .cta-content {
            text-align: center;
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
        }
        
        .cta-content h2 {
            font-family: var(--font-display);
            font-weight: 800;
            font-size: 2.5rem;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        
        .cta-content p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.7;
            margin-bottom: 32px;
        }
        
        /* ========== FOOTER ========== */
        .site-footer {
            background: #05060A;
            border-top: 1px solid var(--border-subtle);
            padding: 60px 0 24px;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.7;
            margin: 16px 0 0;
            max-width: 360px;
        }
        
        .footer-col h5 {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-primary);
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .footer-col ul li {
            margin-bottom: 10px;
        }
        
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: var(--transition-base);
        }
        
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }
        
        .badge-neon {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            padding: 6px 12px;
            border-radius: 16px;
            font-size: 0.75rem;
            font-weight: 500;
        }
        
        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        
        /* ========== FAB ========== */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.8);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.8);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            animation: fabFloat 3s ease-in-out infinite;
        }
        
        .fab-support::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            z-index: -1;
        }
        
        @keyframes fabFloat {
            0%, 100% { transform: translateY(0); opacity: 0.6; }
            50% { transform: translateY(-6px); opacity: 1; }
        }
        
        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
        }
        
        .fab-support:active {
            transform: scale(0.95);
        }
        
        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.5rem;
            }
            
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .payment-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
        }
        
        @media (max-width: 768px) {
            .container-custom {
                padding: 0 16px;
            }
            
            .header-inner {
                height: 60px;
            }
            
            .nav-links {
                display: none;
            }
            
            .nav-auth-btns {
                display: none;
            }
            
            .mobile-toggle {
                display: flex;
            }
            
            .hero-section {
                padding: 120px 0 60px;
            }
            
            .hero-title {
                font-size: 2rem;
            }
            
            .hero-subtitle {
                font-size: 1rem;
            }
            
            .hero-visual {
                margin-top: 40px;
            }
            
            .countdown-ring {
                width: 250px;
                height: 250px;
            }
            
            .countdown-inner {
                width: 210px;
                height: 210px;
            }
            
            .countdown-inner .time {
                font-size: 2rem;
            }
            
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            
            .process-steps {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            
            .payment-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            
            .testimonial-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            
            .section-heading h2 {
                font-size: 1.75rem;
            }
            
            .cta-content h2 {
                font-size: 2rem;
            }
            
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            
            .btn-primary-glow,
            .btn-secondary-outline {
                width: 100%;
                justify-content: center;
            }
            
            .hero-stats {
                gap: 16px;
            }
        }
        
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.75rem;
            }
            
            .payment-grid {
                grid-template-columns: 1fr;
            }
            
            .countdown-ring {
                width: 200px;
                height: 200px;
            }
            
            .countdown-inner {
                width: 168px;
                height: 168px;
            }
            
            .countdown-inner .time {
                font-size: 1.5rem;
            }
            
            .countdown-inner .label {
                font-size: 0.7rem;
            }
            
            .section-heading h2 {
                font-size: 1.5rem;
            }
            
            .cta-content h2 {
                font-size: 1.75rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --card-bg: rgba(13, 17, 30, 0.85);
            --card-border: rgba(0, 240, 255, 0.2);
            --primary-accent: #00F0FF;
            --secondary-accent: #0052FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8A94A6;
            --glow-cyan: rgba(0, 240, 255, 0.5);
            --glow-blue: rgba(0, 82, 255, 0.4);
            --border-radius: 14px;
            --border-radius-lg: 20px;
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.15);
            --font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-family);
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            transition: var(--transition);
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
            padding: 14px 0;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .brand-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }
        .brand-logo i {
            color: var(--primary-accent);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px var(--glow-cyan));
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 8px;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--primary-accent);
            background: rgba(0, 240, 255, 0.08);
        }
        .nav-links a.active {
            color: var(--primary-accent);
            background: rgba(0, 240, 255, 0.12);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.1);
        }
        .nav-auth-btns {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-shrink: 0;
        }
        .btn-login-text {
            padding: 8px 16px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 50px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-login-text:hover {
            border-color: var(--primary-accent);
            color: var(--primary-accent);
            background: rgba(0, 240, 255, 0.05);
        }
        .btn-signup-solid {
            padding: 8px 20px;
            font-size: 0.88rem;
            font-weight: 700;
            color: #08090F;
            background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
            border-radius: 50px;
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-signup-solid:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            color: #08090F;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text-primary);
            padding: 4px 8px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            border-color: var(--primary-accent);
            color: var(--primary-accent);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 20px;
            background: rgba(8, 9, 15, 0.98);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
        }
        .mobile-menu a {
            padding: 12px 16px;
            border-radius: 10px;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .mobile-menu a:hover {
            background: rgba(0, 240, 255, 0.08);
            color: var(--primary-accent);
        }
        .mobile-menu a.active {
            color: var(--primary-accent);
            background: rgba(0, 240, 255, 0.12);
        }
        .mobile-auth {
            display: flex;
            gap: 10px;
            margin-top: 12px;
        }
        /* Hero */
        .hero-section {
            padding: 140px 0 80px;
            background: linear-gradient(180deg, #0D111E 0%, #08090F 100%);
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-content {
            text-align: left;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary-accent);
            margin-bottom: 20px;
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -1.5px;
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 30px;
            max-width: 520px;
        }
        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 35px;
        }
        .btn-primary-glow {
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 700;
            color: #08090F;
            background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
            border-radius: 50px;
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.35);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0, 240, 255, 0.55);
            color: #08090F;
        }
        .btn-secondary-outline {
            padding: 14px 28px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 50px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-secondary-outline:hover {
            border-color: var(--primary-accent);
            color: var(--primary-accent);
            background: rgba(0, 240, 255, 0.05);
        }
        .hero-stats {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: left;
        }
        .hero-stat-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-accent);
            letter-spacing: -0.5px;
        }
        .hero-stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .hero-visual {
            position: relative;
        }
        .hero-visual-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-lg);
            padding: 30px;
            box-shadow: var(--shadow-glow);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }
        .hero-visual-card img {
            border-radius: var(--border-radius);
            margin-bottom: 20px;
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .hero-visual-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .hero-visual-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .badge-neon {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary-accent);
            margin-right: 8px;
            margin-bottom: 8px;
        }
        /* Sections */
        .section-padding {
            padding: 70px 0;
        }
        .section-header {
            text-align: left;
            margin-bottom: 45px;
        }
        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary-accent);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 14px;
            color: var(--text-primary);
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.7;
        }
        /* Coupon Wall */
        .coupon-wall {
            background: var(--secondary-bg);
            border-radius: var(--border-radius-lg);
            padding: 40px;
            border: 1px solid rgba(0, 240, 255, 0.1);
            margin-bottom: 30px;
            position: relative;
            overflow: hidden;
        }
        .coupon-wall::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-accent), var(--secondary-accent));
        }
        .coupon-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
            margin-top: 25px;
        }
        .coupon-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--border-radius);
            padding: 24px;
            transition: var(--transition);
            position: relative;
        }
        .coupon-card:hover {
            border-color: var(--primary-accent);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.15);
            transform: translateY(-4px);
        }
        .coupon-card .coupon-value {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-accent);
            letter-spacing: -1px;
            margin-bottom: 6px;
        }
        .coupon-card .coupon-label {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .coupon-card .coupon-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .coupon-btn {
            width: 100%;
            padding: 10px 16px;
            font-size: 0.85rem;
            font-weight: 700;
            color: #08090F;
            background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
            border-radius: 50px;
            transition: var(--transition);
        }
        .coupon-btn:hover {
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
            color: #08090F;
        }
        .coupon-card.hot {
            border-color: rgba(0, 240, 255, 0.4);
            background: rgba(0, 240, 255, 0.05);
        }
        .coupon-card .hot-tag {
            position: absolute;
            top: 16px;
            right: 16px;
            padding: 3px 10px;
            font-size: 0.7rem;
            font-weight: 700;
            color: #08090F;
            background: var(--primary-accent);
            border-radius: 50px;
            letter-spacing: 0.5px;
        }
        /* Feature Three */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }
        .feature-item {
            background: var(--card-bg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--border-radius);
            padding: 28px;
            transition: var(--transition);
        }
        .feature-item:hover {
            border-color: var(--primary-accent);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 14px;
            margin-bottom: 18px;
            font-size: 1.4rem;
            color: var(--primary-accent);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }
        .feature-item h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .feature-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        /* Steps */
        .steps-section {
            background: var(--secondary-bg);
            border-radius: var(--border-radius-lg);
            padding: 50px 40px;
            border: 1px solid rgba(0, 240, 255, 0.1);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
            counter-reset: step;
        }
        .step-item {
            position: relative;
            padding-left: 60px;
            min-height: 80px;
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            left: 0;
            top: 0;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
            color: #08090F;
            font-weight: 800;
            font-size: 1.1rem;
            border-radius: 12px;
        }
        .step-item h5 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        /* Social Proof */
        .proof-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .proof-card {
            background: var(--card-bg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--border-radius);
            padding: 28px;
            transition: var(--transition);
        }
        .proof-card:hover {
            border-color: var(--primary-accent);
            box-shadow: var(--shadow-glow);
        }
        .proof-rating {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 12px;
        }
        .proof-rating i {
            color: var(--primary-accent);
            font-size: 0.9rem;
        }
        .proof-card blockquote {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            border-left: 3px solid var(--primary-accent);
            padding-left: 16px;
        }
        .proof-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .proof-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #08090F;
            font-size: 1rem;
        }
        .proof-name {
            font-size: 0.88rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        .proof-date {
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        /* FAQ */
        .faq-list {
            max-width: 800px;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--border-radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
        }
        .faq-question {
            width: 100%;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            text-align: left;
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-primary);
            background: transparent;
            transition: var(--transition);
        }
        .faq-question i {
            font-size: 0.8rem;
            color: var(--primary-accent);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question:hover {
            color: var(--primary-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(0, 82, 255, 0.08));
            border-radius: var(--border-radius-lg);
            border: 1px solid rgba(0, 240, 255, 0.2);
            padding: 50px 40px;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -1px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .cta-section p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        /* Footer */
        .site-footer {
            background: #06070A;
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            padding: 60px 0 20px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 14px;
            max-width: 320px;
        }
        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.8rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        /* FAB */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.75), rgba(8, 9, 15, 0.75)), linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-accent);
            font-size: 1.4rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            transition: var(--transition);
            opacity: 0.7;
            animation: fabPulse 3s ease-in-out infinite;
            min-width: 48px;
            min-height: 48px;
        }
        .fab-left:hover {
            opacity: 1;
            transform: scale(1.08);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
        }
        .fab-left:active {
            transform: scale(0.95);
        }
        @keyframes fabPulse {
            0%, 100% { box-shadow: 0 0 20px rgba(0, 240, 255, 0.3); }
            50% { box-shadow: 0 0 35px rgba(0, 240, 255, 0.55); }
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-title {
                font-size: 2.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-auth-btns {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .mobile-menu.active {
                display: flex;
            }
            .hero-section {
                padding: 110px 0 50px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .coupon-wall {
                padding: 24px;
            }
            .steps-section {
                padding: 30px 20px;
            }
            .cta-section {
                padding: 35px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .container-custom {
                padding: 0 16px;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-stat-value {
                font-size: 1.4rem;
            }
            .btn-primary-glow,
            .btn-secondary-outline {
                padding: 12px 20px;
                font-size: 0.88rem;
                width: 100%;
                justify-content: center;
            }
            .hero-cta-group {
                flex-direction: column;
            }
            .coupon-card .coupon-value {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .fab-left {
                width: 50px;
                height: 50px;
                left: 12px;
                bottom: 80px;
                font-size: 1.2rem;
            }
        }