/* roulang page: index */
:root {
            --bg-deep: #0f0c20;
            --bg-secondary: #0b1a30;
            --bg-card: #151231;
            --accent-primary: #ccff00;
            --accent-secondary: #00f0ff;
            --accent-pink: #ff007f;
            --text-primary: #ffffff;
            --text-secondary: #a6acaf;
            --text-muted: #6b7280;
            --border-glow: rgba(0, 240, 255, 0.3);
            --border-subtle: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-glow: 0 0 25px rgba(0, 240, 255, 0.15);
            --shadow-elevated: 0 12px 40px rgba(0, 0, 0, 0.4);
            --font-sans: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: 
                radial-gradient(circle at 20% 20%, rgba(0, 240, 255, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(204, 255, 0, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 50% 50%, rgba(255, 0, 127, 0.02) 0%, transparent 60%);
        }

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

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

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

        button, .btn {
            cursor: pointer;
            transition: var(--transition-base);
        }

        .btn:focus, a:focus, button:focus {
            outline: 3px solid var(--accent-secondary);
            outline-offset: 2px;
            box-shadow: none;
        }

        /* Container customization */
        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container-custom {
                padding: 0 18px;
            }
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            padding: 14px 0;
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(15, 12, 32, 0.98);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
            padding: 10px 0;
        }

        .navbar-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .navbar-logo {
            font-size: 1.15rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 280px;
        }

        .navbar-logo:hover {
            color: var(--accent-primary);
        }

        .navbar-logo .logo-icon {
            width: 38px;
            height: 38px;
            flex-shrink: 0;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--bg-deep);
            font-weight: 900;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 16px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: 50px;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-link.active {
            color: var(--bg-deep);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            font-weight: 700;
        }

        .nav-auth-buttons {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 9px 20px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            border-radius: 50px;
            transition: var(--transition-base);
        }

        .btn-login:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
        }

        .btn-signup {
            padding: 9px 22px;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--bg-deep);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            border-radius: 50px;
            box-shadow: 0 4px 15px rgba(0, 240, 255, 0.25);
            transition: var(--transition-bounce);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 240, 255, 0.4);
            color: var(--bg-deep);
        }

        .navbar-toggler {
            display: none;
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            font-size: 1.3rem;
            padding: 8px 12px;
            border-radius: 8px;
        }

        @media (max-width: 1024px) {
            .navbar-logo {
                max-width: 220px;
                font-size: 0.95rem;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 0.82rem;
            }
            .btn-login, .btn-signup {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                padding: 10px 0;
            }
            .navbar-toggler {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(15, 12, 32, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                gap: 6px;
                border-bottom: 1px solid var(--border-subtle);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-link {
                padding: 12px 16px;
                font-size: 0.95rem;
                border-radius: 10px;
            }
            .nav-auth-buttons {
                display: none;
            }
            .nav-auth-buttons.mobile-visible {
                display: flex;
                gap: 10px;
                padding: 12px 16px;
            }
            .nav-auth-buttons.mobile-visible .btn-login,
            .nav-auth-buttons.mobile-visible .btn-signup {
                flex: 1;
                text-align: center;
            }
        }

        /* Hero Section - Bento Style */
        .hero-section {
            padding: 140px 0 80px;
            position: relative;
            overflow: hidden;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(15, 12, 32, 0.7) 0%, rgba(15, 12, 32, 0.95) 100%);
            z-index: 1;
        }

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

        .hero-bento-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
        }

        .hero-main-block {
            grid-column: 1 / 2;
            grid-row: 1 / 3;
            background: rgba(21, 18, 49, 0.85);
            backdrop-filter: blur(20px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
        }

        .hero-main-block::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent-primary);
            background: rgba(204, 255, 0, 0.08);
            border: 1px solid rgba(204, 255, 0, 0.2);
            border-radius: 50px;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            color: var(--text-primary);
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-description {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 520px;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .btn-primary-glow {
            padding: 14px 32px;
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--bg-deep);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            border-radius: 50px;
            box-shadow: 0 8px 30px rgba(0, 240, 255, 0.35);
            transition: var(--transition-bounce);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 40px rgba(0, 240, 255, 0.5);
            color: var(--bg-deep);
        }

        .btn-secondary-outline {
            padding: 14px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            border-radius: 50px;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

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

        .hero-feature-block {
            background: rgba(21, 18, 49, 0.7);
            backdrop-filter: blur(20px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .hero-feature-block:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }

        .hero-feature-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-secondary);
            margin-bottom: 16px;
        }

        .hero-feature-block h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .hero-feature-block p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        .hero-cta-strip {
            grid-column: 2 / 4;
            grid-row: 2 / 3;
            background: linear-gradient(135deg, rgba(204, 255, 0, 0.08), rgba(0, 240, 255, 0.08));
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .hero-cta-strip .cta-text {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .hero-cta-strip .cta-text span {
            color: var(--accent-primary);
            font-weight: 800;
        }

        @media (max-width: 1024px) {
            .hero-bento-grid {
                grid-template-columns: 1fr 1fr;
                grid-template-rows: auto auto auto;
            }
            .hero-main-block {
                grid-column: 1 / 3;
                grid-row: 1 / 2;
                padding: 40px 32px;
            }
            .hero-feature-block {
                grid-column: auto;
                grid-row: auto;
            }
            .hero-cta-strip {
                grid-column: 1 / 3;
                grid-row: auto;
            }
            .hero-title {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 120px 0 60px;
                min-height: auto;
            }
            .hero-bento-grid {
                grid-template-columns: 1fr;
                grid-template-rows: auto;
                gap: 16px;
            }
            .hero-main-block {
                grid-column: 1 / 2;
                grid-row: auto;
                padding: 32px 24px;
            }
            .hero-feature-block {
                grid-column: 1 / 2;
                grid-row: auto;
                padding: 22px;
            }
            .hero-cta-strip {
                grid-column: 1 / 2;
                grid-row: auto;
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-description {
                font-size: 0.95rem;
            }
            .btn-primary-glow, .btn-secondary-outline {
                padding: 12px 24px;
                font-size: 0.85rem;
                width: 100%;
                justify-content: center;
            }
        }

        /* Section general */
        .section-block {
            padding: 80px 0;
            position: relative;
        }

        .section-block.alt-bg {
            background: rgba(11, 26, 48, 0.5);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-header {
            margin-bottom: 48px;
            text-align: left;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent-secondary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.25;
        }

        .section-description {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 700px;
        }

        @media (max-width: 768px) {
            .section-block {
                padding: 50px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-description {
                font-size: 0.9rem;
            }
        }

        /* Voucher Grid Section */
        .voucher-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }

        .voucher-card {
            background: rgba(21, 18, 49, 0.8);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px;
            position: relative;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .voucher-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            opacity: 0;
            transition: var(--transition-base);
        }

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

        .voucher-card:hover::before {
            opacity: 1;
        }

        .voucher-card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            background: rgba(204, 255, 0, 0.08);
            color: var(--accent-primary);
        }

        .voucher-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .voucher-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .voucher-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 50px;
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-secondary);
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }

        .voucher-tag.hot {
            background: rgba(255, 0, 127, 0.1);
            color: var(--accent-pink);
        }

        /* Rules Section */
        .rules-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .rules-item {
            display: flex;
            gap: 16px;
            padding: 22px 24px;
            background: rgba(21, 18, 49, 0.6);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            transition: var(--transition-base);
            align-items: flex-start;
        }

        .rules-item:hover {
            border-color: var(--border-glow);
            background: rgba(21, 18, 49, 0.8);
        }

        .rules-item-icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            border-radius: 10px;
            background: rgba(0, 240, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--accent-secondary);
        }

        .rules-item-content h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .rules-item-content p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .rules-list {
                grid-template-columns: 1fr;
            }
            .rules-item {
                padding: 18px;
            }
        }

        /* Info / News Section */
        .news-layout {
            display: grid;
            grid-template-columns: 1.6fr 1fr;
            gap: 32px;
            align-items: start;
        }

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

        .news-list-item {
            display: flex;
            gap: 16px;
            padding: 20px;
            background: rgba(21, 18, 49, 0.6);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            transition: var(--transition-base);
            text-decoration: none;
        }

        .news-list-item:hover {
            border-color: var(--border-glow);
            background: rgba(21, 18, 49, 0.8);
            transform: translateX(4px);
        }

        .news-list-thumb {
            width: 70px;
            height: 70px;
            flex-shrink: 0;
            border-radius: 10px;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.05);
        }

        .news-list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-list-content {
            flex: 1;
            min-width: 0;
        }

        .news-list-content h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .news-list-content p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            margin-bottom: 8px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-meta {
            font-size: 0.72rem;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .news-sidebar-card {
            background: rgba(21, 18, 49, 0.7);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px;
        }

        .news-sidebar-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-subtle);
        }

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

        .news-sidebar-list li a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
            transition: var(--transition-base);
        }

        .news-sidebar-list li a:hover {
            color: var(--accent-secondary);
        }

        .news-sidebar-list li a .dot {
            width: 6px;
            height: 6px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--accent-primary);
            margin-top: 7px;
        }

        @media (max-width: 1024px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
            .news-sidebar {
                flex-direction: row;
                flex-wrap: wrap;
            }
            .news-sidebar-card {
                flex: 1;
                min-width: 250px;
            }
        }

        @media (max-width: 768px) {
            .news-sidebar {
                flex-direction: column;
            }
            .news-list-item {
                padding: 16px;
            }
            .news-list-thumb {
                width: 50px;
                height: 50px;
            }
            .news-list-content h4 {
                font-size: 0.85rem;
            }
        }

        /* Entrance Matrix */
        .entrance-matrix {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .entrance-card {
            background: rgba(21, 18, 49, 0.7);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: left;
            transition: var(--transition-bounce);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 12px;
            text-decoration: none;
        }

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

        .entrance-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            background: rgba(204, 255, 0, 0.08);
            color: var(--accent-primary);
        }

        .entrance-card h3 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
        }

        .entrance-card p {
            font-size: 0.8rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.5;
        }

        @media (max-width: 1024px) {
            .entrance-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .entrance-matrix {
                grid-template-columns: 1fr;
            }
        }

        /* Reward Preview */
        .reward-preview-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .reward-card {
            background: rgba(21, 18, 49, 0.7);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
            position: relative;
        }

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

        .reward-card-image {
            width: 100%;
            height: 180px;
            overflow: hidden;
            position: relative;
        }

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

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

        .reward-card-body {
            padding: 22px;
        }

        .reward-card-body h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .reward-card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 14px;
            line-height: 1.6;
        }

        .reward-value {
            font-size: 1.3rem;
            font-weight: 900;
            color: var(--accent-primary);
            display: block;
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .reward-preview-grid {
                grid-template-columns: 1fr;
            }
            .reward-card-image {
                height: 150px;
            }
        }

        /* FAQ Section */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 900px;
        }

        .faq-item {
            background: rgba(21, 18, 49, 0.7);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 0.95rem;
            font-weight: 700;
            text-align: left;
            cursor: pointer;
            transition: var(--transition-base);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-secondary);
            font-size: 0.8rem;
            transition: var(--transition-base);
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
            background: rgba(204, 255, 0, 0.15);
            color: var(--accent-primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 0;
        }

        .cta-box {
            position: relative;
            z-index: 1;
            background: rgba(21, 18, 49, 0.9);
            backdrop-filter: blur(20px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
        }

        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .cta-box p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h2 {
                font-size: 1.5rem;
            }
            .cta-box p {
                font-size: 0.9rem;
            }
        }

        /* Footer */
        .site-footer {
            background: rgba(8, 9, 15, 0.95);
            border-top: 1px solid var(--border-subtle);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 400px;
        }

        .footer-column h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links li a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .footer-bottom .domain-info {
            font-weight: 600;
            color: var(--text-secondary);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 96px;
            z-index: 1040;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(20px);
            border: 2px solid var(--accent-secondary);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.5), 0 8px 30px rgba(0, 0, 0, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-secondary);
            cursor: pointer;
            transition: var(--transition-bounce);
            opacity: 0.7;
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.8), 0 12px 40px rgba(0, 0, 0, 0.5);
        }

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

        .fab-left .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 16px;
            height: 16px;
            background: var(--accent-pink);
            border-radius: 50%;
            border: 2px solid var(--bg-deep);
            animation: fab-blink 1.5s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { box-shadow: 0 0 20px rgba(0, 240, 255, 0.4), 0 8px 30px rgba(0, 0, 0, 0.4); }
            50% { box-shadow: 0 0 30px rgba(0, 240, 255, 0.7), 0 8px 30px rgba(0, 0, 0, 0.4); }
        }

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

        @media (max-width: 768px) {
            .fab-left {
                left: 16px;
                bottom: 80px;
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #0F0C20;
            --secondary-bg: #0B1A30;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --border-neon: rgba(0, 240, 255, 0.25);
            --border-neon-strong: rgba(0, 240, 255, 0.6);
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --shadow-neon: 0 0 18px rgba(0, 240, 255, 0.15);
            --shadow-neon-strong: 0 0 28px rgba(0, 240, 255, 0.3);
            --spacing-section: 80px;
            --font-body: 'Segoe UI', 'Roboto', system-ui, -apple-system, sans-serif;
        }

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

        body {
            font-family: var(--font-body);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.25s ease;
        }

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

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

        button, .btn {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            transition: all 0.25s ease;
        }

        button:focus-visible, .btn:focus-visible, a:focus-visible {
            outline: 3px solid var(--accent-lime);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .site-header {
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-neon);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 14px 0;
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.08);
        }

        .navbar-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .navbar-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-white);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }

        .navbar-logo .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #0F0C20;
            box-shadow: 0 0 16px rgba(204, 255, 0, 0.4);
            flex-shrink: 0;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            display: inline-block;
            padding: 9px 16px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-silver);
            border-radius: 30px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.08);
        }

        .nav-link.active {
            color: #0F0C20;
            background: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
            font-weight: 700;
        }

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

        .btn-login {
            padding: 8px 18px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-white);
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

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

        .btn-signup {
            padding: 8px 20px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.9rem;
            color: #0F0C20;
            background: var(--accent-lime);
            box-shadow: 0 0 16px rgba(204, 255, 0, 0.4);
            white-space: nowrap;
        }

        .btn-signup:hover {
            background: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
            color: #0F0C20;
            transform: translateY(-2px);
        }

        .navbar-toggler {
            display: none;
            background: transparent;
            border: 1.5px solid var(--border-neon);
            border-radius: 8px;
            color: var(--text-white);
            font-size: 1.4rem;
            padding: 8px 14px;
            line-height: 1;
        }

        .mobile-visible {
            display: none !important;
        }

        /* Hero Section */
        .hero-category {
            position: relative;
            padding: 90px 0 70px;
            background: radial-gradient(ellipse at top right, rgba(0, 240, 255, 0.08), transparent 55%),
                        radial-gradient(ellipse at bottom left, rgba(204, 255, 0, 0.05), transparent 45%),
                        linear-gradient(160deg, var(--primary-bg) 30%, var(--secondary-bg) 100%);
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.12), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -35%;
            left: -15%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-neon-strong);
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: 22px;
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -1.2px;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #FFFFFF 40%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.12rem;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 540px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary-neon {
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            color: #0F0C20;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            box-shadow: 0 0 22px rgba(0, 240, 255, 0.35);
            transition: all 0.35s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-primary-neon:hover {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.55);
            transform: translateY(-3px);
            color: #0F0C20;
        }

        .btn-outline-neon {
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-white);
            background: transparent;
            border: 1.5px solid var(--border-neon-strong);
            transition: all 0.35s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-outline-neon:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-3px);
        }

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

        .hero-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-neon);
            box-shadow: var(--shadow-neon);
        }

        .hero-countdown-bar {
            position: relative;
            z-index: 3;
            margin-top: 50px;
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-md);
            padding: 18px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .countdown-label {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--accent-cyan);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .countdown-timer {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .countdown-box {
            background: rgba(0, 240, 255, 0.12);
            border-radius: 10px;
            padding: 10px 16px;
            text-align: center;
            min-width: 60px;
        }

        .countdown-box .number {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1;
        }

        .countdown-box .unit {
            font-size: 0.7rem;
            color: var(--text-silver);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* Section Common */
        .section-block {
            padding: var(--spacing-section) 0;
        }

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

        .section-header {
            margin-bottom: 40px;
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .section-header-left {
            max-width: 680px;
        }

        .section-eyebrow {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            color: var(--accent-lime);
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.8px;
            margin-bottom: 12px;
        }

        .section-desc {
            color: var(--text-silver);
            font-size: 1.05rem;
            line-height: 1.65;
            max-width: 620px;
        }

        /* Feature Grid */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-lime), var(--accent-cyan));
            opacity: 0;
            transition: opacity 0.35s ease;
        }

        .feature-card:hover {
            border-color: var(--border-neon-strong);
            transform: translateY(-4px);
            box-shadow: var(--shadow-neon);
            background: rgba(0, 240, 255, 0.04);
        }

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

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(204, 255, 0, 0.12), rgba(0, 240, 255, 0.12));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            margin-bottom: 18px;
        }

        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .feature-card p {
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.6;
            margin: 0;
        }

        /* Steps Process */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
        }

        .step-item {
            padding: 24px 20px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-md);
            border-left: 3px solid var(--accent-cyan);
            position: relative;
            transition: all 0.3s ease;
        }

        .step-item:hover {
            background: rgba(0, 240, 255, 0.05);
            transform: translateX(4px);
        }

        .step-number {
            display: inline-block;
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-lime);
            line-height: 1;
            margin-bottom: 14px;
            opacity: 0.8;
        }

        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-item p {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.55;
            margin: 0;
        }

        /* App Showcase */
        .app-showcase-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .app-card {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all 0.35s ease;
        }

        .app-card:hover {
            border-color: var(--border-neon-strong);
            box-shadow: var(--shadow-neon);
            transform: translateY(-3px);
        }

        .app-card img {
            width: 80px;
            height: 80px;
            border-radius: 18px;
            object-fit: cover;
            flex-shrink: 0;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .app-card-content h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .app-card-content .app-tag {
            display: inline-block;
            background: rgba(204, 255, 0, 0.12);
            color: var(--accent-lime);
            font-size: 0.72rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 20px;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .app-card-content p {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.55;
            margin: 0;
        }

        /* Tips Section */
        .tips-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            align-items: stretch;
        }

        .tips-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-neon);
            box-shadow: var(--shadow-neon);
            min-height: 360px;
        }

        .tips-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 360px;
        }

        .tips-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .tip-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px 20px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-md);
            border-left: 3px solid var(--accent-lime);
            transition: all 0.3s ease;
        }

        .tip-item:hover {
            background: rgba(204, 255, 0, 0.05);
            transform: translateX(4px);
        }

        .tip-item .tip-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(204, 255, 0, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-lime);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .tip-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .tip-item p {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.5;
            margin: 0;
        }

        /* FAQ */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

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

        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-weight: 700;
            font-size: 1rem;
            transition: all 0.3s ease;
            user-select: none;
        }

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

        .faq-question i {
            transition: transform 0.35s ease;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.65;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(204, 255, 0, 0.06));
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.8px;
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
        }

        .cta-section p {
            color: var(--text-silver);
            font-size: 1.05rem;
            line-height: 1.6;
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 2;
        }

        .cta-section .btn-primary-neon {
            position: relative;
            z-index: 2;
        }

        /* Footer */
        .site-footer {
            background: #0A0816;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 50px 0 30px;
            margin-top: 80px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 1.25rem;
            font-weight: 800;
            margin-bottom: 14px;
            color: var(--text-white);
        }

        .footer-brand p {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.6;
            max-width: 360px;
        }

        .footer-column h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-white);
        }

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

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

        .footer-links a {
            color: var(--text-silver);
            font-size: 0.9rem;
            transition: all 0.25s ease;
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-silver);
        }

        .domain-info {
            font-weight: 600;
            color: rgba(255, 255, 255, 0.7);
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 900;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
            cursor: pointer;
            opacity: 0.65;
            transition: all 0.35s ease;
            animation: fabBreathe 3s ease-in-out infinite;
        }

        .fab-floating::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            z-index: -1;
            opacity: 0.7;
        }

        .fab-floating:hover {
            opacity: 1;
            transform: scale(1.12);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
            color: var(--accent-lime);
        }

        .fab-floating:active {
            transform: scale(0.94);
        }

        @keyframes fabBreathe {
            0%, 100% { opacity: 0.6; }
            50% { opacity: 0.85; }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .hero-title {
                font-size: 2.3rem;
            }

            .hero-visual img {
                height: 340px;
            }

            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }

            .tips-container {
                grid-template-columns: 1fr;
            }

            .tips-image {
                min-height: 260px;
            }

            .tips-image img {
                min-height: 260px;
            }
        }

        @media (max-width: 768px) {
            .container-custom {
                padding: 0 16px;
            }

            .navbar-wrapper {
                gap: 12px;
            }

            .navbar-logo {
                font-size: 1.05rem;
            }

            .navbar-logo .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }

            .navbar-toggler {
                display: block;
            }

            .nav-menu {
                display: none;
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                gap: 4px;
                padding: 16px 0 8px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                margin-top: 12px;
            }

            .nav-menu.show {
                display: flex;
            }

            .nav-link {
                padding: 12px 16px;
                border-radius: 10px;
            }

            .nav-auth-buttons:not(.mobile-visible) {
                display: none;
            }

            .mobile-visible {
                display: flex !important;
                gap: 10px;
                padding: 10px 0;
            }

            .btn-login, .btn-signup {
                flex: 1;
                text-align: center;
                padding: 10px 16px;
                font-size: 0.85rem;
            }

            .hero-category {
                padding: 60px 0 50px;
            }

            .hero-title {
                font-size: 1.9rem;
                letter-spacing: -0.5px;
            }

            .hero-subtitle {
                font-size: 1rem;
            }

            .hero-actions {
                flex-direction: column;
            }

            .btn-primary-neon, .btn-outline-neon {
                justify-content: center;
                width: 100%;
            }

            .hero-visual img {
                height: 240px;
            }

            .hero-countdown-bar {
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 20px;
            }

            .countdown-timer {
                flex-wrap: wrap;
            }

            .countdown-box {
                min-width: 48px;
                padding: 8px 12px;
            }

            .countdown-box .number {
                font-size: 1.3rem;
            }

            .section-block {
                padding: 56px 0;
            }

            .section-header {
                flex-direction: column;
                gap: 12px;
            }

            .section-title {
                font-size: 1.6rem;
            }

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

            .steps-list {
                grid-template-columns: 1fr;
            }

            .app-showcase-grid {
                grid-template-columns: 1fr;
            }

            .app-card {
                flex-direction: column;
                align-items: flex-start;
            }

            .app-card img {
                width: 64px;
                height: 64px;
            }

            .cta-section {
                padding: 40px 20px;
                border-radius: var(--radius-md);
            }

            .cta-section h2 {
                font-size: 1.6rem;
            }

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

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .fab-floating {
                left: 16px;
                bottom: 80px;
                width: 50px;
                height: 50px;
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }

            .hero-visual img {
                height: 200px;
            }

            .section-title {
                font-size: 1.4rem;
            }

            .countdown-box {
                min-width: 40px;
                padding: 6px 10px;
            }

            .countdown-box .number {
                font-size: 1.1rem;
            }

            .countdown-box .unit {
                font-size: 0.6rem;
            }
        }

/* roulang page: article */
:root {
            --primary-bg: #0F0C20;
            --secondary-bg: #1A1533;
            --accent-neon: #CCFF00;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --glass-border: rgba(255, 255, 255, 0.15);
            --glass-bg: rgba(255, 255, 255, 0.05);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-xxl: 96px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        
        body {
            font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            background-color: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        
        a:hover {
            color: var(--accent-cyan);
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        button {
            cursor: pointer;
            font-family: inherit;
        }
        
        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: var(--spacing-md);
            padding-right: var(--spacing-md);
        }
        
        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--glass-border);
            transition: all var(--transition-smooth);
        }
        
        .navbar-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: var(--spacing-md);
        }
        
        .navbar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-white);
            white-space: nowrap;
        }
        
        .navbar-logo:hover {
            color: var(--accent-cyan);
        }
        
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-neon));
            border-radius: 50%;
            color: var(--primary-bg);
            font-size: 1.1rem;
            box-shadow: var(--shadow-glow);
            animation: logoGlow 3s ease-in-out infinite;
        }
        
        @keyframes logoGlow {
            0%, 100% { box-shadow: 0 0 15px rgba(0, 240, 255, 0.4); }
            50% { box-shadow: 0 0 25px rgba(0, 240, 255, 0.7); }
        }
        
        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: var(--spacing-xs);
            margin: 0;
            padding: 0;
        }
        
        .nav-link {
            display: block;
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-silver);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        
        .nav-link:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
        }
        
        .nav-link.active {
            color: var(--primary-bg);
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-neon));
            font-weight: 600;
        }
        
        .nav-auth-buttons {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .btn-login {
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-white);
            border: 1px solid var(--glass-border);
            background: transparent;
            transition: all var(--transition-fast);
        }
        
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        
        .btn-signup {
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary-bg);
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-neon));
            transition: all var(--transition-fast);
            box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
        }
        
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 25px rgba(0, 240, 255, 0.5);
            color: var(--primary-bg);
        }
        
        .navbar-toggler {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            padding: 8px;
        }
        
        /* Article Content */
        .article-section {
            padding: var(--spacing-xl) 0;
            flex: 1;
        }
        
        .article-header {
            margin-bottom: var(--spacing-lg);
            padding-bottom: var(--spacing-lg);
            border-bottom: 1px solid var(--glass-border);
            position: relative;
        }
        
        .article-header::before {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-neon));
            border-radius: 3px;
        }
        
        .article-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(204, 255, 0, 0.15);
            color: var(--accent-neon);
            border: 1px solid rgba(204, 255, 0, 0.3);
            margin-bottom: var(--spacing-md);
        }
        
        .article-title {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: var(--spacing-md);
            color: var(--text-white);
            letter-spacing: -0.5px;
        }
        
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: var(--spacing-md);
            color: var(--text-silver);
            font-size: 0.85rem;
        }
        
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        
        .article-meta i {
            color: var(--accent-cyan);
        }
        
        .article-body {
            font-size: 1.05rem;
            line-height: 1.7;
            color: #E8E8E8;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-top: var(--spacing-lg);
            margin-bottom: var(--spacing-md);
            color: var(--text-white);
        }
        
        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-top: var(--spacing-md);
            margin-bottom: var(--spacing-sm);
            color: var(--text-white);
        }
        
        .article-body p {
            margin-bottom: var(--spacing-md);
        }
        
        .article-body ul, .article-body ol {
            margin-bottom: var(--spacing-md);
            padding-left: 1.5rem;
        }
        
        .article-body li {
            margin-bottom: var(--spacing-xs);
        }
        
        .article-body img {
            border-radius: var(--radius-md);
            margin: var(--spacing-md) 0;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
        }
        
        .article-body a {
            color: var(--accent-cyan);
            text-decoration: underline;
        }
        
        .article-body a:hover {
            color: var(--accent-neon);
        }
        
        .article-not-found {
            text-align: center;
            padding: var(--spacing-xxl) 0;
            color: var(--text-silver);
        }
        
        .article-not-found i {
            font-size: 4rem;
            color: var(--accent-cyan);
            margin-bottom: var(--spacing-md);
            opacity: 0.5;
        }
        
        .article-not-found h2 {
            color: var(--text-white);
            font-size: 1.8rem;
            margin-bottom: var(--spacing-sm);
        }
        
        .btn-back-home {
            display: inline-block;
            margin-top: var(--spacing-md);
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            color: var(--primary-bg);
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-neon));
            transition: all var(--transition-fast);
            box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
        }
        
        .btn-back-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 25px rgba(0, 240, 255, 0.5);
            color: var(--primary-bg);
        }
        
        /* Related CTA Section */
        .cta-section {
            margin-top: var(--spacing-xl);
            padding: var(--spacing-lg);
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(204, 255, 0, 0.1));
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            text-align: center;
        }
        
        .cta-section h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
        }
        
        .cta-section p {
            color: var(--text-silver);
            margin-bottom: var(--spacing-md);
        }
        
        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--glass-border);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: var(--spacing-xl);
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        
        .footer-brand h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            color: var(--accent-cyan);
        }
        
        .footer-brand p {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        
        .footer-column h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: var(--spacing-sm);
            color: var(--text-white);
        }
        
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .footer-links li {
            margin-bottom: var(--spacing-xs);
        }
        
        .footer-links a {
            color: var(--text-silver);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        
        .footer-links a:hover {
            color: var(--accent-cyan);
        }
        
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--glass-border);
            color: var(--text-silver);
            font-size: 0.8rem;
        }
        
        /* FAB - Cyber & Neon Style */
        .fab-floating {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), linear-gradient(135deg, var(--accent-neon), var(--accent-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            animation: fabBreathing 3s ease-in-out infinite;
            opacity: 0.6;
        }
        
        .fab-floating:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
            animation: none;
        }
        
        .fab-floating:active {
            transform: scale(0.95);
            border-color: #FF007F;
            box-shadow: 0 0 20px rgba(255, 0, 127, 0.6);
        }
        
        .fab-floating i {
            color: var(--accent-neon);
            font-size: 1.5rem;
            text-shadow: 0 0 10px rgba(204, 255, 0, 0.8);
        }
        
        .fab-notification {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--primary-bg);
            animation: blinkNotification 2s ease-in-out infinite;
        }
        
        @keyframes fabBreathing {
            0%, 100% { box-shadow: 0 0 15px rgba(0, 240, 255, 0.5); }
            50% { box-shadow: 0 0 25px rgba(0, 240, 255, 0.8); }
        }
        
        @keyframes blinkNotification {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        
        /* Responsive */
        @media (max-width: 1024px) {
            .container-custom {
                padding-left: var(--spacing-sm);
                padding-right: var(--spacing-sm);
            }
            
            .article-title {
                font-size: 1.8rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
        }
        
        @media (max-width: 768px) {
            .navbar-toggler {
                display: block;
            }
            
            .nav-menu {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(15, 12, 32, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: var(--spacing-md);
                gap: var(--spacing-xs);
                border-bottom: 1px solid var(--glass-border);
                display: none;
            }
            
            .nav-menu.show {
                display: flex;
            }
            
            .nav-link {
                width: 100%;
                padding: 12px 16px;
            }
            
            .nav-auth-buttons {
                display: none;
            }
            
            .nav-auth-buttons.mobile-visible {
                display: flex;
                flex-direction: column;
                width: 100%;
                gap: 8px;
                padding-top: var(--spacing-sm);
                border-top: 1px solid var(--glass-border);
            }
            
            .nav-auth-buttons.mobile-visible a {
                width: 100%;
                text-align: center;
            }
            
            .article-title {
                font-size: 1.5rem;
            }
            
            .article-body {
                font-size: 1rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: var(--spacing-xs);
            }
        }
        
        @media (max-width: 520px) {
            .article-title {
                font-size: 1.3rem;
            }
            
            .article-body {
                font-size: 0.95rem;
            }
            
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-xs);
            }
            
            .fab-floating {
                width: 48px;
                height: 48px;
                left: 12px;
                bottom: 80px;
            }
            
            .fab-floating i {
                font-size: 1.2rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary-bg: #0F0C20;
            --secondary-bg: #0B1A30;
            --accent-cyan: #00F0FF;
            --accent-lime: #CCFF00;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #6C757D;
            --card-bg: rgba(255, 255, 255, 0.05);
            --card-border: rgba(255, 255, 255, 0.1);
            --glass-bg: rgba(255, 255, 255, 0.08);
            --glass-border: rgba(255, 255, 255, 0.15);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 15px rgba(204, 255, 0, 0.4);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--glass-border);
            padding: 12px 0;
            transition: var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(15, 12, 32, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        }

        .navbar-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: nowrap;
        }

        .navbar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.1rem;
            white-space: nowrap;
            transition: var(--transition-fast);
        }

        .navbar-logo:hover {
            color: var(--accent-cyan);
            transform: translateY(-1px);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            border-radius: 50%;
            font-size: 1.1rem;
            color: var(--primary-bg);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex: 1;
            justify-content: center;
            flex-wrap: nowrap;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            display: block;
            padding: 10px 18px;
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            transition: var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.12);
            box-shadow: inset 0 0 0 1px rgba(0, 240, 255, 0.3);
        }

        .nav-auth-buttons {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 9px 20px;
            background: transparent;
            border: 1px solid var(--glass-border);
            color: var(--text-white);
            border-radius: var(--radius-sm);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.9rem;
            transition: var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.3);
            color: var(--accent-cyan);
        }

        .btn-signup {
            padding: 9px 22px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            color: var(--primary-bg);
            border-radius: var(--radius-sm);
            text-decoration: none;
            font-weight: 700;
            font-size: 0.9rem;
            border: none;
            transition: var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            color: var(--primary-bg);
        }

        .navbar-toggler {
            display: none;
            background: transparent;
            border: 1px solid var(--glass-border);
            color: var(--text-white);
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            cursor: pointer;
            transition: var(--transition-fast);
            align-items: center;
            justify-content: center;
        }

        .navbar-toggler:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent-cyan);
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            padding: 80px 0 60px;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            min-height: 600px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(15, 12, 32, 0.9) 0%, rgba(11, 26, 48, 0.8) 50%, rgba(15, 12, 32, 0.9) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }

        .hero-badge {
            display: inline-block;
            padding: 8px 16px;
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid rgba(0, 240, 255, 0.4);
            color: var(--accent-cyan);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #FFFFFF 0%, #CCFF00 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-description {
            font-size: 1.15rem;
            color: var(--text-silver);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 600px;
        }

        .hero-stats {
            display: flex;
            gap: 30px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }

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

        .hero-stat-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent-lime);
        }

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

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary-custom {
            padding: 14px 32px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            color: var(--primary-bg);
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            border: none;
            transition: var(--transition-smooth);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.4);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.6);
            color: var(--primary-bg);
        }

        .btn-secondary-custom {
            padding: 14px 28px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid var(--glass-border);
            color: var(--text-white);
            border-radius: 50px;
            font-weight: 500;
            font-size: 1rem;
            text-decoration: none;
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            backdrop-filter: blur(10px);
        }

        .btn-secondary-custom:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-3px);
        }

        .hero-visual {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-image-wrapper {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--glass-border);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 240, 255, 0.2);
            max-width: 500px;
            width: 100%;
        }

        .hero-image-wrapper img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Section Base */
        .section-block {
            padding: 80px 0;
            position: relative;
        }

        .section-block:nth-child(even) {
            background: var(--secondary-bg);
        }

        .section-header {
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--text-white);
        }

        .section-description {
            font-size: 1.05rem;
            color: var(--text-silver);
            line-height: 1.7;
            max-width: 700px;
        }

        /* Feature Cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

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

        .feature-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 240, 255, 0.2);
            transform: translateY(-5px);
        }

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

        .feature-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(204, 255, 0, 0.15));
            border-radius: 50%;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-white);
        }

        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* Tips Section */
        .tips-container {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .tip-item {
            display: flex;
            gap: 20px;
            padding: 24px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            transition: var(--transition-smooth);
            align-items: flex-start;
        }

        .tip-item:hover {
            border-color: rgba(0, 240, 255, 0.4);
            background: rgba(255, 255, 255, 0.1);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
        }

        .tip-number {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            border-radius: 50%;
            color: var(--primary-bg);
            font-weight: 700;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .tip-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-white);
        }

        .tip-content p {
            font-size: 0.95rem;
            color: var(--text-silver);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* App Grid */
        .app-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }

        .app-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition-smooth);
            text-align: left;
        }

        .app-card:hover {
            border-color: rgba(204, 255, 0, 0.5);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), 0 0 15px rgba(204, 255, 0, 0.3);
            transform: translateY(-4px);
        }

        .app-card-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .app-card-icon {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(204, 255, 0, 0.2));
            border-radius: 50%;
            font-size: 1.2rem;
            color: var(--accent-cyan);
        }

        .app-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0;
            color: var(--text-white);
        }

        .app-card .app-status {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-top: 8px;
        }

        .app-status.active {
            background: rgba(204, 255, 0, 0.2);
            color: var(--accent-lime);
            border: 1px solid rgba(204, 255, 0, 0.4);
        }

        .app-status.upcoming {
            background: rgba(0, 240, 255, 0.2);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.4);
        }

        .app-card p {
            font-size: 0.9rem;
            color: var(--text-silver);
            margin-bottom: 0;
            line-height: 1.5;
        }

        /* Warning Section */
        .warning-box {
            background: rgba(255, 200, 0, 0.1);
            border: 1px solid rgba(255, 200, 0, 0.3);
            border-radius: var(--radius-md);
            padding: 32px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

        .warning-icon {
            font-size: 2rem;
            color: #FFC800;
            flex-shrink: 0;
        }

        .warning-box h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #FFC800;
        }

        .warning-box p {
            font-size: 0.95rem;
            color: var(--text-silver);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* FAQ */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .accordion-custom {
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background: var(--glass-bg);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .accordion-custom:hover {
            border-color: rgba(0, 240, 255, 0.3);
        }

        .accordion-button-custom {
            width: 100%;
            padding: 20px 24px;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            text-align: left;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: var(--transition-fast);
        }

        .accordion-button-custom:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .accordion-button-custom .fa-chevron-down {
            transition: var(--transition-smooth);
            color: var(--accent-cyan);
        }

        .accordion-button-custom.active .fa-chevron-down {
            transform: rotate(180deg);
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .accordion-content-inner {
            padding: 0 24px 20px;
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* CTA Section */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(204, 255, 0, 0.1));
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
        }

        .cta-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            backdrop-filter: blur(20px);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        }

        .cta-card h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-white);
        }

        .cta-card p {
            font-size: 1.05rem;
            color: var(--text-silver);
            margin-bottom: 32px;
            line-height: 1.6;
        }

        /* Footer */
        .site-footer {
            background: #0A0818;
            border-top: 1px solid var(--glass-border);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--accent-cyan);
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-silver);
            line-height: 1.6;
        }

        .footer-column h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-white);
        }

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

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

        .footer-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
            padding-left: 5px;
        }

        .footer-bottom {
            border-top: 1px solid var(--glass-border);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .domain-info {
            color: var(--text-silver);
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 24px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.8);
            backdrop-filter: blur(15px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-smooth);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            opacity: 0.6;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            text-decoration: none;
            animation: fabFloat 3s ease-in-out infinite;
        }

        .fab::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime), var(--accent-cyan));
            z-index: -1;
            background-size: 200% 200%;
            animation: gradientShift 4s ease infinite;
        }

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

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

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }

        .fab:active {
            transform: scale(0.95);
            border-color: var(--accent-lime);
        }

        .fab .notification-dot {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid #000;
            animation: blinkDot 1.5s ease-in-out infinite;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.5rem;
            }
            
            .hero-section {
                min-height: auto;
                padding: 60px 0;
            }
            
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .navbar-wrapper {
                flex-wrap: wrap;
            }

            .navbar-toggler {
                display: flex;
            }

            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(15, 12, 32, 0.98);
                flex-direction: column;
                padding: 20px;
                gap: 4px;
                border-bottom: 1px solid var(--glass-border);
                z-index: 999;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }

            .nav-menu.open {
                display: flex;
            }

            .nav-link {
                width: 100%;
                text-align: left;
                padding: 12px 16px;
            }

            .nav-auth-buttons {
                display: none;
            }

            .nav-auth-buttons.mobile-visible {
                display: flex;
                flex-direction: column;
                width: 100%;
                gap: 8px;
                padding: 12px 0;
            }

            .btn-login, .btn-signup {
                width: 100%;
                text-align: center;
            }

            .hero-title {
                font-size: 2rem;
            }

            .hero-description {
                font-size: 1rem;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-stat-number {
                font-size: 1.5rem;
            }

            .section-block {
                padding: 50px 0;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }

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

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

            .cta-card h2 {
                font-size: 1.5rem;
            }

            .warning-box {
                flex-direction: column;
                padding: 24px;
            }

            .tip-item {
                flex-direction: column;
                gap: 12px;
                padding: 20px;
            }

            .fab {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 16px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 16px;
            }

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

            .hero-section {
                padding: 40px 0;
            }

            .hero-actions {
                flex-direction: column;
            }

            .btn-primary-custom, .btn-secondary-custom {
                width: 100%;
                justify-content: center;
            }

            .section-block {
                padding: 40px 0;
            }

            .section-title {
                font-size: 1.4rem;
            }

            .feature-card {
                padding: 24px 18px;
            }

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