/* roulang page: index */
/* ==================== DESIGN SYSTEM VARIABLES ==================== */
        :root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-tertiary: #111827;
            --bg-glass: rgba(13, 17, 30, 0.55);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.35);
            --accent-glow-soft: rgba(0, 82, 255, 0.25);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-tertiary: #94A3B8;
            --border-color: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.45);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-full: 9999px;
            --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.15);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-button: 0 0 25px rgba(0, 82, 255, 0.35);
            --shadow-button-hover: 0 0 40px rgba(0, 240, 255, 0.55);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        /* ==================== RESET & BASE ==================== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: var(--transition);
        }

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

        /* ==================== CONTAINER ==================== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (min-width: 768px) {
            .container { padding: 0 2rem; }
        }

        @media (min-width: 1024px) {
            .container { padding: 0 2.5rem; }
        }

        /* ==================== HEADER / NAV ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
            border-bottom-color: var(--border-glow);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            gap: 1rem;
            position: relative;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            min-width: 0;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .nav-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.2rem;
            height: 2.2rem;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
        }

        .nav-logo-text {
            display: inline-block;
            max-width: 200px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            font-size: 0.95rem;
        }

        @media (min-width: 768px) {
            .nav-logo-text { max-width: 300px; font-size: 1.05rem; }
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            list-style: none;
        }

        .nav-links li a {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
            border-color: rgba(0, 240, 255, 0.15);
        }

        .nav-links li a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.1);
            border-color: rgba(0, 240, 255, 0.25);
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid rgba(203, 213, 225, 0.25);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-login:hover {
            color: var(--text-primary);
            border-color: rgba(203, 213, 225, 0.5);
            background: rgba(203, 213, 225, 0.06);
        }

        .btn-signup {
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), #0066FF);
            border: 1px solid rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-button);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-1px);
            background: linear-gradient(135deg, #0052FF, var(--accent-secondary));
        }

        .btn-signup:active {
            transform: translateY(0);
            box-shadow: var(--shadow-button);
        }

        /* Hamburger */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 0.5rem;
            border-radius: var(--radius-sm);
            background: transparent;
            border: 1px solid rgba(203, 213, 225, 0.2);
            transition: var(--transition);
        }

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

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Mobile Menu */
        .mobile-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: rgba(8, 9, 15, 0.97);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 1rem 1.5rem 1.5rem;
            flex-direction: column;
            gap: 0.5rem;
            z-index: 99;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
        }

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

        .mobile-menu a {
            padding: 0.75rem 1rem;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 0.6rem;
            transition: var(--transition);
        }

        .mobile-menu a:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
        }

        .mobile-menu a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.1);
            font-weight: 600;
        }

        @media (max-width: 767px) {
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 0.4rem 0.8rem;
                font-size: 0.78rem;
            }
        }

        @media (min-width: 768px) {
            .nav-toggle {
                display: none;
            }
        }

        /* ==================== HERO ==================== */
        .hero {
            padding: 7rem 0 4rem;
            position: relative;
            overflow: hidden;
            background: radial-gradient(ellipse at 20% 30%, rgba(0, 82, 255, 0.08) 0%, transparent 50%),
                        radial-gradient(ellipse at 80% 70%, rgba(0, 240, 255, 0.06) 0%, transparent 50%),
                        var(--bg-primary);
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: 
                linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
            background-size: 50px 50px;
            pointer-events: none;
            mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%);
            -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.25);
            margin-bottom: 1.25rem;
            text-transform: uppercase;
        }

        .hero-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-secondary);
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.5); }
        }

        .hero h1 {
            font-size: 2rem;
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent-secondary), #4DD0FF);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        @media (min-width: 640px) {
            .hero h1 { font-size: 2.5rem; }
        }

        @media (min-width: 1024px) {
            .hero h1 { font-size: 3rem; }
        }

        .hero-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 1.75rem;
            max-width: 650px;
        }

        @media (min-width: 768px) {
            .hero-subtitle { font-size: 1.05rem; }
        }

        .hero-cta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-bottom: 2rem;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 1.75rem;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), #0066FF);
            border: 1px solid rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-button);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-2px);
            background: linear-gradient(135deg, #0052FF, var(--accent-secondary));
            border-color: rgba(0, 240, 255, 0.6);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-button);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 1.75rem;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(203, 213, 225, 0.3);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.05);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.1);
        }

        /* Hero Icon Matrix */
        .hero-icon-matrix {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0.75rem;
            margin-bottom: 1.5rem;
        }

        @media (min-width: 640px) {
            .hero-icon-matrix {
                grid-template-columns: repeat(6, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .hero-icon-matrix {
                grid-template-columns: repeat(8, 1fr);
            }
        }

        .hero-icon-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.4rem;
            padding: 0.75rem 0.5rem;
            border-radius: var(--radius-md);
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid rgba(0, 240, 255, 0.12);
            backdrop-filter: blur(8px);
            transition: var(--transition);
            text-align: center;
        }

        .hero-icon-item:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
            transform: translateY(-2px);
        }

        .hero-icon-item i {
            font-size: 1.3rem;
            color: var(--accent-secondary);
        }

        .hero-icon-item span {
            font-size: 0.7rem;
            font-weight: 500;
            color: var(--text-tertiary);
            line-height: 1.2;
        }

        /* Hero Status Bar */
        .hero-status-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            align-items: center;
            padding: 0.85rem 1.25rem;
            border-radius: var(--radius-md);
            background: rgba(13, 17, 30, 0.7);
            border: 1px solid rgba(0, 240, 255, 0.15);
            backdrop-filter: blur(10px);
            margin-bottom: 1.25rem;
        }

        .hero-status-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        .hero-status-item .status-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #22C55E;
            box-shadow: 0 0 8px rgba(34, 197, 94, 0.6);
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        .hero-status-divider {
            width: 1px;
            height: 1.2rem;
            background: rgba(203, 213, 225, 0.2);
        }

        .hero-data-row {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 0.5rem;
        }

        .hero-data-item {
            display: flex;
            flex-direction: column;
            gap: 0.15rem;
        }

        .hero-data-item .data-number {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent-secondary);
            letter-spacing: -0.02em;
        }

        .hero-data-item .data-label {
            font-size: 0.75rem;
            color: var(--text-tertiary);
            font-weight: 500;
        }

        /* ==================== SECTION COMMON ==================== */
        .section {
            padding: 3.5rem 0;
            position: relative;
        }

        .section-header {
            margin-bottom: 2.25rem;
            max-width: 750px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-secondary);
            margin-bottom: 0.6rem;
            background: rgba(0, 240, 255, 0.08);
            padding: 0.3rem 0.8rem;
            border-radius: var(--radius-full);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }

        .section-title {
            font-size: 1.5rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }

        @media (min-width: 768px) {
            .section-title { font-size: 1.85rem; }
        }

        .section-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 650px;
        }

        .section.center-text {
            text-align: center;
        }

        .section.center-text .section-header {
            margin-left: auto;
            margin-right: auto;
        }

        .section.center-text .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Glass Card */
        .glass-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: var(--transition);
            overflow: hidden;
        }

        .glass-card:hover {
            border-color: rgba(0, 240, 255, 0.35);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }

        /* ==================== VOUCHER GRID / TICKET GRID ==================== */
        .voucher-section {
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            position: relative;
        }

        .voucher-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.3), transparent);
        }

        .voucher-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
        }

        @media (min-width: 640px) {
            .voucher-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (min-width: 1024px) {
            .voucher-grid { grid-template-columns: repeat(3, 1fr); }
        }

        .voucher-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(14px);
            padding: 1.5rem;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .voucher-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            opacity: 0;
            transition: var(--transition);
        }

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

        .voucher-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        .voucher-card .voucher-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 3rem;
            height: 3rem;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            color: var(--accent-secondary);
            font-size: 1.3rem;
            margin-bottom: 1rem;
            transition: var(--transition);
        }

        .voucher-card:hover .voucher-icon {
            background: rgba(0, 240, 255, 0.18);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
        }

        .voucher-card .voucher-label {
            display: inline-block;
            padding: 0.2rem 0.7rem;
            border-radius: var(--radius-full);
            font-size: 0.68rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.2);
            margin-bottom: 0.6rem;
            align-self: flex-start;
        }

        .voucher-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }

        .voucher-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.65;
            flex: 1;
        }

        .voucher-card .voucher-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 1rem;
            padding-top: 0.75rem;
            border-top: 1px solid rgba(203, 213, 225, 0.1);
        }

        .voucher-card .voucher-tag {
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--text-tertiary);
        }

        .voucher-card .voucher-arrow {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-secondary);
            transition: var(--transition);
        }

        .voucher-card:hover .voucher-arrow {
            gap: 0.6rem;
        }

        /* ==================== RULES SECTION ==================== */
        .rules-section {
            background: var(--bg-secondary);
            position: relative;
        }

        .rules-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.25), transparent);
        }

        .rules-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
        }

        @media (min-width: 1024px) {
            .rules-layout {
                grid-template-columns: 1fr 1.2fr;
                gap: 2.5rem;
                align-items: start;
            }
        }

        .rules-steps {
            list-style: none;
            margin-top: 1.5rem;
        }

        .rules-steps li {
            display: flex;
            gap: 1rem;
            padding: 1.1rem 0;
            border-bottom: 1px solid rgba(203, 213, 225, 0.08);
            transition: var(--transition);
        }

        .rules-steps li:hover {
            background: rgba(0, 240, 255, 0.03);
            padding-left: 0.5rem;
            border-radius: var(--radius-sm);
        }

        .rules-steps .step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.2rem;
            height: 2.2rem;
            border-radius: var(--radius-full);
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-secondary);
            font-weight: 800;
            font-size: 0.9rem;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .rules-steps li:hover .step-number {
            background: rgba(0, 240, 255, 0.2);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }

        .rules-steps .step-content h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
            line-height: 1.4;
        }

        .rules-steps .step-content p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .rules-banner {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.2);
            min-height: 300px;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: flex-end;
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
        }

        .rules-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8,9,15,0.2) 0%, rgba(8,9,15,0.85) 100%);
            pointer-events: none;
        }

        .rules-banner-content {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .rules-banner-content .banner-title {
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.4rem;
        }

        .rules-banner-content .banner-desc {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.6;
        }

        /* ==================== EVIDENCE / STATS ==================== */
        .stats-section {
            background: var(--bg-primary);
            position: relative;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }

        @media (min-width: 640px) {
            .stats-grid { grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
        }

        .stat-card {
            text-align: center;
            padding: 1.5rem 1rem;
            border-radius: var(--radius-lg);
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            backdrop-filter: blur(10px);
            transition: var(--transition);
        }

        .stat-card:hover {
            border-color: rgba(0, 240, 255, 0.35);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        .stat-card .stat-number {
            font-size: 1.7rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, var(--accent-secondary), #4DD0FF);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            margin-bottom: 0.3rem;
        }

        .stat-card .stat-label {
            font-size: 0.78rem;
            color: var(--text-tertiary);
            font-weight: 500;
            line-height: 1.4;
        }

        /* ==================== TESTIMONIALS / REVIEW WALL ==================== */
        .testimonial-section {
            background: var(--bg-secondary);
            position: relative;
        }

        .testimonial-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.25), transparent);
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1rem;
        }

        @media (min-width: 640px) {
            .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (min-width: 1024px) {
            .testimonial-grid { grid-template-columns: repeat(3, 1fr); }
        }

        .testimonial-card {
            padding: 1.5rem;
            border-radius: var(--radius-lg);
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            backdrop-filter: blur(10px);
            transition: var(--transition);
        }

        .testimonial-card:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-glow);
        }

        .testimonial-card .stars {
            display: flex;
            gap: 0.25rem;
            margin-bottom: 0.75rem;
            color: #FFC107;
            font-size: 0.85rem;
        }

        .testimonial-card .quote {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 1rem;
            font-style: italic;
        }

        .testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding-top: 0.75rem;
            border-top: 1px solid rgba(203, 213, 225, 0.08);
        }

        .testimonial-card .author-avatar {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.2rem;
            height: 2.2rem;
            border-radius: var(--radius-full);
            background: rgba(0, 240, 255, 0.15);
            color: var(--accent-secondary);
            font-size: 0.8rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .testimonial-card .author-info .author-name {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .testimonial-card .author-info .author-role {
            font-size: 0.72rem;
            color: var(--text-tertiary);
        }

        /* ==================== CMS NEWS LIST ==================== */
        .news-section {
            background: var(--bg-primary);
            position: relative;
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        @media (min-width: 768px) {
            .news-layout {
                grid-template-columns: 1.4fr 0.8fr;
                gap: 2rem;
                align-items: start;
            }
        }

        .news-list {
            list-style: none;
        }

        .news-list li {
            border-bottom: 1px solid rgba(203, 213, 225, 0.08);
            transition: var(--transition);
        }

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

        .news-list li a {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
            padding: 1rem 0.75rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .news-list li a:hover {
            background: rgba(0, 240, 255, 0.05);
            padding-left: 1rem;
        }

        .news-list .news-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
        }

        .news-list .news-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.72rem;
            color: var(--text-tertiary);
        }

        .news-list .news-meta .news-category {
            color: var(--accent-secondary);
            font-weight: 600;
        }

        .news-list .news-excerpt {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        .news-sidebar {
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(10px);
            padding: 1.5rem;
            position: sticky;
            top: 6rem;
        }

        .news-sidebar .sidebar-title {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: var(--accent-secondary);
        }

        .news-sidebar .sidebar-tip {
            display: flex;
            gap: 0.75rem;
            padding: 0.8rem 0;
            border-bottom: 1px solid rgba(203, 213, 225, 0.07);
        }

        .news-sidebar .sidebar-tip:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .news-sidebar .sidebar-tip i {
            color: var(--accent-secondary);
            font-size: 0.9rem;
            flex-shrink: 0;
            margin-top: 0.15rem;
        }

        .news-sidebar .sidebar-tip span {
            font-size: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        .no-news {
            text-align: center;
            padding: 2rem 1rem;
            color: var(--text-tertiary);
            font-size: 0.9rem;
            background: var(--bg-glass);
            border-radius: var(--radius-md);
            border: 1px dashed rgba(203, 213, 225, 0.2);
        }

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

        .faq-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.25), transparent);
        }

        .faq-list {
            max-width: 750px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid rgba(0, 240, 255, 0.12);
            border-radius: var(--radius-md);
            margin-bottom: 0.75rem;
            overflow: hidden;
            background: var(--bg-glass);
            backdrop-filter: blur(10px);
            transition: var(--transition);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.1rem 1.25rem;
            cursor: pointer;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition);
        }

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

        .faq-question .faq-icon {
            font-size: 0.8rem;
            color: var(--accent-secondary);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.25rem;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.25rem 1.1rem;
        }

        .faq-answer p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ==================== FINAL CTA ==================== */
        .cta-section {
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 82, 255, 0.12) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 20%, rgba(0, 240, 255, 0.06) 0%, transparent 40%);
            pointer-events: none;
        }

        .cta-box {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 3rem 1.5rem;
            border-radius: var(--radius-xl);
            background: rgba(13, 17, 30, 0.7);
            border: 1px solid rgba(0, 240, 255, 0.2);
            backdrop-filter: blur(16px);
            box-shadow: 0 0 50px rgba(0, 82, 255, 0.15);
        }

        @media (min-width: 768px) {
            .cta-box { padding: 4rem 2.5rem; }
        }

        .cta-box h2 {
            font-size: 1.5rem;
            font-weight: 900;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }

        @media (min-width: 768px) {
            .cta-box h2 { font-size: 2rem; }
        }

        .cta-box p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 550px;
            margin: 0 auto 1.75rem;
        }

        .cta-box .btn-primary {
            font-size: 1rem;
            padding: 0.9rem 2.25rem;
        }

        .cta-trust-badges {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.25rem;
            margin-top: 1.5rem;
            font-size: 0.75rem;
            color: var(--text-tertiary);
        }

        .cta-trust-badges span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .cta-trust-badges i {
            color: var(--accent-secondary);
            font-size: 0.7rem;
        }

        /* ==================== FOOTER ==================== */
        .site-footer {
            background: rgba(8, 9, 15, 0.95);
            border-top: 1px solid var(--border-color);
            padding: 2.5rem 0 0;
            position: relative;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            padding-bottom: 2rem;
        }

        @media (min-width: 640px) {
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (min-width: 1024px) {
            .footer-grid { grid-template-columns: repeat(4, 1fr); }
        }

        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .footer-col p {
            font-size: 0.82rem;
            color: var(--text-tertiary);
            line-height: 1.65;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 0.5rem;
        }

        .footer-col ul li a {
            font-size: 0.82rem;
            color: var(--text-tertiary);
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(203, 213, 225, 0.08);
            padding: 1.25rem 0;
            text-align: center;
            font-size: 0.78rem;
            color: var(--text-tertiary);
        }

        .footer-bottom a {
            color: var(--accent-secondary);
            font-weight: 500;
        }

        .footer-bottom a:hover {
            text-decoration: underline;
        }

        .footer-disclaimer {
            font-size: 0.7rem;
            color: rgba(148, 163, 184, 0.6);
            line-height: 1.5;
            padding-bottom: 1.5rem;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        /* ==================== FAB ==================== */
        .fab {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 90;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(13, 17, 30, 0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(13, 17, 30, 0.75), rgba(13, 17, 30, 0.75)), 
                              linear-gradient(135deg, #00F0FF, #0052FF, #00F0FF);
            background-origin: padding-box, border-box;
            background-clip: padding-box, border-box;
            color: var(--accent-secondary);
            font-size: 1.25rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
            transition: var(--transition);
            cursor: pointer;
            opacity: 0.7;
            animation: fab-breathe 3s ease-in-out infinite;
            min-width: 48px;
            min-height: 48px;
            text-decoration: none;
        }

        .fab:hover {
            opacity: 1;
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.6), 0 0 60px rgba(0, 82, 255, 0.3);
            transform: scale(1.1);
            animation: none;
            color: #fff;
            border-color: #00F0FF;
        }

        .fab:active {
            transform: scale(0.95);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
        }

        .fab .fab-dot {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #FF007F;
            box-shadow: 0 0 8px rgba(255, 0, 127, 0.7);
            animation: blink-notify 1.5s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { transform: translateY(0); opacity: 0.7; }
            50% { transform: translateY(-3px); opacity: 0.85; }
        }

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

        /* ==================== RESPONSIVE ==================== */
        @media (max-width: 767px) {
            .hero {
                padding: 5.5rem 0 3rem;
            }
            .hero h1 {
                font-size: 1.75rem;
            }
            .hero-icon-matrix {
                grid-template-columns: repeat(4, 1fr);
                gap: 0.5rem;
            }
            .hero-icon-item {
                padding: 0.5rem 0.35rem;
            }
            .hero-icon-item i {
                font-size: 1rem;
            }
            .hero-icon-item span {
                font-size: 0.62rem;
            }
            .hero-status-bar {
                padding: 0.6rem 0.85rem;
                gap: 0.5rem;
                flex-wrap: wrap;
            }
            .hero-status-bar .hero-status-divider {
                display: none;
            }
            .hero-data-row {
                gap: 1rem;
            }
            .section {
                padding: 2.5rem 0;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .voucher-card {
                padding: 1.25rem;
            }
            .news-sidebar {
                position: static;
                top: auto;
            }
            .cta-box {
                padding: 2rem 1rem;
            }
            .cta-box h2 {
                font-size: 1.3rem;
            }
            .fab {
                width: 50px;
                height: 50px;
                left: 0.75rem;
                bottom: 5rem;
                font-size: 1.1rem;
            }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            .hero h1 {
                font-size: 2.25rem;
            }
            .voucher-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .news-sidebar {
                position: static;
                top: auto;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .hero {
                padding: 8rem 0 5rem;
            }
            .section {
                padding: 4.5rem 0;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-tertiary: #111827;
            --bg-glass: rgba(13, 17, 30, 0.55);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.35);
            --accent-glow-soft: rgba(0, 82, 255, 0.25);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-tertiary: #94A3B8;
            --border-color: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.45);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-full: 9999px;
            --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.15);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-button: 0 0 25px rgba(0, 82, 255, 0.35);
            --shadow-button-hover: 0 0 40px rgba(0, 240, 255, 0.55);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Be Vietnam Pro', 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        *, *::before, *::after {
            box-sizing: border-box;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: var(--transition);
        }
        button:focus-visible, a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
        }
        ul, ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (min-width: 768px) {
            .container { padding: 0 2rem; }
        }
        @media (min-width: 1024px) {
            .container { padding: 0 2.5rem; }
        }

        /* ==================== HEADER / NAV ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
            border-bottom-color: var(--border-glow);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            gap: 1rem;
            position: relative;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            min-width: 0;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .nav-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.2rem;
            height: 2.2rem;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
        }
        .nav-logo-text {
            display: inline-block;
            max-width: 200px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            font-size: 0.95rem;
        }
        @media (min-width: 1024px) {
            .nav-logo-text { max-width: 300px; font-size: 1.05rem; }
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            list-style: none;
        }
        .nav-links li a {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
            border-color: rgba(0, 240, 255, 0.15);
        }
        .nav-links li a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.1);
            border-color: rgba(0, 240, 255, 0.25);
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }
        .btn-login {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-login:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
            border-color: rgba(0, 240, 255, 0.18);
        }
        .btn-signup {
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            box-shadow: var(--shadow-button);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-signup:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-1px);
        }
        .btn-signup:active {
            transform: translateY(0) scale(0.97);
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.3);
        }
        .nav-toggle {
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 2.5rem;
            height: 2.5rem;
            padding: 0.5rem;
            border-radius: var(--radius-sm);
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            border-color: var(--border-glow);
            background: rgba(0, 240, 255, 0.1);
        }
        .nav-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            background: var(--text-secondary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle span:last-child { width: 60%; }
        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 0.75rem 0 1rem;
            gap: 0.25rem;
            border-top: 1px solid var(--border-color);
            margin-top: 0.5rem;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.7rem 1rem;
            border-radius: var(--radius-md);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .mobile-menu a:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
        }
        .mobile-menu a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.1);
            border-color: rgba(0, 240, 255, 0.2);
            font-weight: 600;
        }
        @media (max-width: 1023px) {
            .nav-links { display: none; }
            .nav-toggle { display: flex; }
        }
        @media (min-width: 1024px) {
            .nav-toggle { display: none; }
            .mobile-menu { display: none !important; }
        }

        /* ==================== FAB ==================== */
        .fab-left {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 3.25rem;
            height: 3.25rem;
            border-radius: var(--radius-full);
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1.5px solid var(--border-glow);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5), 0 0 30px rgba(0, 82, 255, 0.25);
            color: var(--accent-secondary);
            font-size: 1.25rem;
            cursor: pointer;
            opacity: 0.6;
            overflow: hidden;
            transition: var(--transition);
        }
        .fab-left:hover {
            opacity: 1;
            scale: 1.1;
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7), 0 0 50px rgba(0, 82, 255, 0.4);
        }
        .fab-left:active {
            scale: 0.95;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
        }
        .fab-left::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            border-radius: var(--radius-full);
            background: conic-gradient(from 0deg, #00F0FF, #0052FF, #00F0FF);
            opacity: 0;
            transition: var(--transition);
            z-index: -1;
        }
        .fab-left:hover::before {
            opacity: 0.8;
        }
        .fab-left .fab-dot {
            position: absolute;
            top: 8px;
            right: 8px;
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: #FF007F;
            box-shadow: 0 0 8px rgba(255, 0, 127, 0.8);
            animation: blink-dot 1.6s ease-in-out infinite;
        }
        @keyframes blink-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* ==================== HERO ==================== */
        .hero-cat {
            position: relative;
            padding: 8rem 0 5rem;
            min-height: 75vh;
            display: flex;
            align-items: flex-end;
            background: linear-gradient(180deg, rgba(8,9,15,0.55) 0%, rgba(8,9,15,0.85) 60%, var(--bg-primary) 100%), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            overflow: hidden;
        }
        .hero-cat::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(0,82,255,0.2) 0%, transparent 55%), radial-gradient(ellipse at 20% 60%, rgba(0,240,255,0.1) 0%, transparent 50%);
            pointer-events: none;
        }
        .hero-cat .container {
            position: relative;
            z-index: 1;
        }
        .hero-cat-breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: var(--text-tertiary);
            margin-bottom: 1.5rem;
        }
        .hero-cat-breadcrumb a {
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .hero-cat-breadcrumb a:hover {
            color: var(--accent-secondary);
        }
        .hero-cat-breadcrumb .sep {
            color: var(--text-tertiary);
        }
        .hero-cat-breadcrumb .current {
            color: var(--accent-secondary);
            font-weight: 600;
        }
        .hero-cat h1 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin: 0 0 1rem;
            color: var(--text-primary);
            max-width: 800px;
            text-wrap: balance;
        }
        .hero-cat h1 .highlight {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-cat .lead {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
            margin: 0 0 2rem;
        }
        .hero-cat-actions {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.85rem 2rem;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            box-shadow: var(--shadow-button);
            transition: var(--transition);
            letter-spacing: 0.01em;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0) scale(0.97);
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.3);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.85rem 2rem;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(255,255,255,0.03);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .btn-secondary:hover {
            color: var(--text-primary);
            border-color: var(--border-glow);
            background: rgba(0,240,255,0.06);
            box-shadow: 0 0 20px rgba(0,240,255,0.1);
        }
        .hero-cat-stats {
            display: flex;
            gap: 2.5rem;
            flex-wrap: wrap;
            margin-top: 2.5rem;
            padding-top: 1.8rem;
            border-top: 1px solid var(--border-color);
        }
        .hero-cat-stat {
            display: flex;
            flex-direction: column;
            gap: 0.2rem;
        }
        .hero-cat-stat .stat-value {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }
        .hero-cat-stat .stat-value span {
            color: var(--accent-secondary);
        }
        .hero-cat-stat .stat-label {
            font-size: 0.8rem;
            color: var(--text-tertiary);
            font-weight: 500;
        }

        /* ==================== SECTION GENERAL ==================== */
        .section {
            padding: 4.5rem 0;
        }
        .section-alt {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .section-head {
            margin-bottom: 2.5rem;
        }
        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-secondary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 1rem;
        }
        .section-head .eyebrow i {
            font-size: 0.7rem;
        }
        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin: 0;
            color: var(--text-primary);
            max-width: 700px;
        }
        .section-head p {
            font-size: 1rem;
            color: var(--text-tertiary);
            margin: 0.8rem 0 0;
            max-width: 650px;
            line-height: 1.7;
        }

        /* ==================== VALUE PROPOSITION ==================== */
        .value-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
            margin-top: 1rem;
        }
        @media (min-width: 640px) {
            .value-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (min-width: 1024px) {
            .value-grid { grid-template-columns: repeat(3, 1fr); }
        }
        .value-item {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            padding: 1.5rem;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .value-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }
        .value-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .value-item:hover::before { opacity: 1; }
        .value-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.75rem;
            height: 2.75rem;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(0,82,255,0.2), rgba(0,240,255,0.15));
            border: 1px solid var(--border-color);
            color: var(--accent-secondary);
            font-size: 1.15rem;
            flex-shrink: 0;
        }
        .value-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin: 0 0 0.5rem;
            color: var(--text-primary);
        }
        .value-item p {
            font-size: 0.9rem;
            color: var(--text-tertiary);
            line-height: 1.7;
            margin: 0;
        }

        /* ==================== METHOD CARDS ==================== */
        .method-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        @media (min-width: 640px) {
            .method-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (min-width: 1024px) {
            .method-grid { grid-template-columns: repeat(3, 1fr); }
        }
        .method-card {
            position: relative;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .method-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 15px 45px rgba(0,82,255,0.25);
            transform: translateY(-4px);
        }
        .method-card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .method-card-img::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, transparent 30%, rgba(8,9,15,0.9) 100%);
        }
        .method-card-body {
            padding: 1.25rem 1.5rem 1.5rem;
        }
        .method-card-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--accent-secondary);
            background: rgba(0,240,255,0.1);
            border: 1px solid rgba(0,240,255,0.2);
            padding: 0.3rem 0.75rem;
            border-radius: var(--radius-full);
            margin-bottom: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .method-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin: 0 0 0.6rem;
            color: var(--text-primary);
        }
        .method-card p {
            font-size: 0.9rem;
            color: var(--text-tertiary);
            line-height: 1.7;
            margin: 0 0 1rem;
        }
        .method-card .method-meta {
            display: flex;
            gap: 1rem;
            font-size: 0.75rem;
            color: var(--text-tertiary);
            padding-top: 0.8rem;
            border-top: 1px solid var(--border-color);
        }
        .method-card .method-meta span {
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }
        .method-card .method-meta i {
            color: var(--accent-secondary);
            font-size: 0.7rem;
        }

        /* ==================== SCENARIOS ==================== */
        .scenario-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            align-items: start;
        }
        @media (min-width: 1024px) {
            .scenario-layout { grid-template-columns: 1fr 1fr; gap: 3rem; }
        }
        .scenario-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .scenario-item {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            padding: 1.1rem 1.25rem;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .scenario-item:hover {
            border-color: var(--border-glow);
            background: var(--bg-tertiary);
            box-shadow: 0 4px 20px rgba(0,82,255,0.15);
        }
        .scenario-item .num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 1.9rem;
            height: 1.9rem;
            border-radius: var(--radius-full);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .scenario-item h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin: 0 0 0.3rem;
            color: var(--text-primary);
        }
        .scenario-item p {
            font-size: 0.85rem;
            color: var(--text-tertiary);
            line-height: 1.65;
            margin: 0;
        }
        .scenario-visual {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }
        .scenario-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 280px;
        }
        .scenario-visual .overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(8,9,15,0.4) 0%, rgba(0,82,255,0.2) 100%);
            display: flex;
            align-items: flex-end;
            padding: 1.5rem;
        }
        .scenario-visual .overlay .label {
            font-size: 0.85rem;
            font-weight: 600;
            color: #fff;
            background: rgba(0,0,0,0.5);
            backdrop-filter: blur(8px);
            padding: 0.6rem 1.25rem;
            border-radius: var(--radius-full);
            border: 1px solid rgba(255,255,255,0.2);
        }

        /* ==================== STEPS ==================== */
        .steps-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
        }
        @media (min-width: 1024px) {
            .steps-layout { grid-template-columns: 1fr 1fr 1fr 1fr; gap: 1.5rem; }
        }
        .step-item {
            position: relative;
            padding: 1.75rem 1.5rem;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            transition: var(--transition);
        }
        .step-item:hover {
            border-color: var(--border-glow);
            box-shadow: 0 8px 25px rgba(0,82,255,0.2);
            transform: translateY(-3px);
        }
        .step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.6rem;
            height: 2.6rem;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            font-size: 1.1rem;
            font-weight: 800;
            margin-bottom: 1rem;
            box-shadow: 0 0 15px rgba(0,82,255,0.4);
        }
        .step-item h3 {
            font-size: 1rem;
            font-weight: 700;
            margin: 0 0 0.5rem;
            color: var(--text-primary);
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--text-tertiary);
            line-height: 1.7;
            margin: 0;
        }

        /* ==================== TRUST / STATS ==================== */
        .trust-band {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
            text-align: left;
            padding: 2.5rem;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
        }
        @media (min-width: 1024px) {
            .trust-band { grid-template-columns: repeat(4, 1fr); }
        }
        .trust-stat {
            display: flex;
            flex-direction: column;
            gap: 0.3rem;
        }
        .trust-stat .value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .trust-stat .label {
            font-size: 0.85rem;
            color: var(--text-tertiary);
            font-weight: 500;
        }

        /* ==================== FAQ ==================== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            max-width: 800px;
        }
        .faq-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            width: 100%;
            padding: 1.1rem 1.5rem;
            text-align: left;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--accent-secondary);
        }
        .faq-question .icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 1.75rem;
            height: 1.75rem;
            border-radius: var(--radius-full);
            background: rgba(0,240,255,0.08);
            border: 1px solid var(--border-color);
            color: var(--accent-secondary);
            font-size: 0.8rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question .icon.rotate {
            transform: rotate(180deg);
        }
        .faq-answer {
            display: none;
            padding: 0 1.5rem 1.25rem;
            font-size: 0.9rem;
            color: var(--text-tertiary);
            line-height: 1.7;
        }
        .faq-answer.open {
            display: block;
        }

        /* ==================== CTA ==================== */
        .cta-section {
            background: linear-gradient(135deg, #0A1A3F 0%, #0D111E 50%, #08090F 100%);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 4rem 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 500px;
            height: 500px;
            transform: translate(-50%, -50%);
            background: radial-gradient(circle, rgba(0,82,255,0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-box {
            position: relative;
            text-align: center;
            max-width: 650px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: 1.75rem;
            font-weight: 800;
            margin: 0 0 1rem;
            letter-spacing: -0.02em;
        }
        .cta-box p {
            font-size: 1rem;
            color: var(--text-tertiary);
            margin: 0 0 2rem;
            line-height: 1.7;
        }
        .cta-box .cta-actions {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            justify-content: center;
        }

        /* ==================== FOOTER ==================== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 3.5rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            padding-bottom: 2.5rem;
        }
        @media (min-width: 640px) {
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (min-width: 1024px) {
            .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin: 0 0 1rem;
            color: var(--text-primary);
        }
        .footer-col p {
            font-size: 0.9rem;
            color: var(--text-tertiary);
            line-height: 1.7;
            margin: 0;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--text-tertiary);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent-secondary);
            padding-left: 0.25rem;
        }
        .footer-disclaimer {
            font-size: 0.8rem;
            color: var(--text-tertiary);
            padding: 1.5rem 0;
            border-top: 1px solid var(--border-color);
            line-height: 1.7;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding: 1.25rem 0;
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: var(--text-tertiary);
        }
        .footer-bottom a {
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--accent-secondary);
        }

        /* ==================== RESPONSIVE ==================== */
        @media (max-width: 520px) {
            .hero-cat { padding: 7rem 0 3.5rem; min-height: 70vh; }
            .hero-cat h1 { font-size: 1.75rem; }
            .hero-cat .lead { font-size: 0.95rem; }
            .hero-cat-stats { gap: 1.25rem; }
            .hero-cat-stat .stat-value { font-size: 1.2rem; }
            .section { padding: 3rem 0; }
            .section-head h2 { font-size: 1.5rem; }
            .trust-band { padding: 1.5rem; grid-template-columns: 1fr 1fr; gap: 1rem; }
            .trust-stat .value { font-size: 1.4rem; }
            .cta-box h2 { font-size: 1.4rem; }
            .btn-primary, .btn-secondary { padding: 0.75rem 1.25rem; font-size: 0.85rem; width: 100%; justify-content: center; }
            .hero-cat-actions { flex-direction: column; }
            .hero-cat-actions .btn-primary, .hero-cat-actions .btn-secondary { width: 100%; justify-content: center; }
            .nav-logo-text { max-width: 140px; font-size: 0.85rem; }
            .nav-actions .btn-login, .nav-actions .btn-signup { font-size: 0.75rem; padding: 0.45rem 0.8rem; }
        }
        @media (max-width: 380px) {
            .nav-logo-text { max-width: 110px; font-size: 0.75rem; }
        }

/* roulang page: article */
/* ==================== DESIGN SYSTEM VARIABLES ==================== */
        :root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-tertiary: #111827;
            --bg-glass: rgba(13, 17, 30, 0.55);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.35);
            --accent-glow-soft: rgba(0, 82, 255, 0.25);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-tertiary: #94A3B8;
            --border-color: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.45);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-full: 9999px;
            --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.15);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-button: 0 0 25px rgba(0, 82, 255, 0.35);
            --shadow-button-hover: 0 0 40px rgba(0, 240, 255, 0.55);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-display: 'Be Vietnam Pro', 'Inter', 'Segoe UI', system-ui, sans-serif;
        }

        /* ==================== RESET / BASE ==================== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(ellipse at 50% -20%, rgba(0, 82, 255, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 100% 100%, rgba(0, 240, 255, 0.04) 0%, transparent 45%);
            background-attachment: fixed;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: var(--transition);
        }

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

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-display);
            line-height: 1.25;
            font-weight: 700;
            letter-spacing: -0.02em;
        }

        /* ==================== CONTAINER ==================== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (min-width: 768px) {
            .container { padding: 0 2rem; }
        }

        @media (min-width: 1024px) {
            .container { padding: 0 2.5rem; }
        }

        /* ==================== HEADER / NAV ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
            border-bottom-color: var(--border-glow);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            gap: 1rem;
            position: relative;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            min-width: 0;
            overflow: hidden;
            text-overflow: ellipsis;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.2rem;
            height: 2.2rem;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
        }

        .nav-logo-text {
            display: inline-block;
            max-width: 200px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            font-size: 0.95rem;
        }

        @media (min-width: 768px) {
            .nav-logo-text { max-width: 300px; font-size: 1.05rem; }
        }

        .nav-links {
            display: none;
            align-items: center;
            gap: 0.35rem;
            list-style: none;
            flex-shrink: 1;
            min-width: 0;
        }

        @media (min-width: 1024px) {
            .nav-links { display: flex; }
        }

        .nav-links li a {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
            border-color: rgba(0, 240, 255, 0.15);
        }

        .nav-links li a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.1);
            border-color: rgba(0, 240, 255, 0.25);
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-login:hover {
            color: var(--text-primary);
            border-color: rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.05);
        }

        .btn-signup {
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 0 18px rgba(0, 82, 255, 0.3);
        }

        .btn-signup:hover {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
        }

        .btn-signup:active {
            transform: scale(0.96);
        }

        /* Nav Toggle (Mobile) */
        .nav-toggle {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.03);
            flex-shrink: 0;
        }

        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text-secondary);
            border-radius: 2px;
            transition: var(--transition);
        }

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

        @media (min-width: 1024px) {
            .nav-toggle { display: none; }
        }

        /* Mobile Menu */
        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 0.25rem;
            padding: 0.75rem 0 1rem;
            border-top: 1px solid var(--border-color);
            background: rgba(8, 9, 15, 0.98);
        }

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

        @media (min-width: 1024px) {
            .mobile-menu { display: none; }
        }

        .mobile-menu a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.75rem 1rem;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .mobile-menu a:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
        }

        .mobile-menu a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.1);
            font-weight: 600;
        }

        /* ==================== ARTICLE HERO ==================== */
        .article-hero {
            padding: 8rem 0 3rem;
            position: relative;
            overflow: hidden;
            background-image: linear-gradient(180deg, rgba(8,9,15,0.75) 0%, rgba(8,9,15,0.92) 60%, var(--bg-primary) 100%),
                url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            min-height: 420px;
            display: flex;
            align-items: flex-end;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(0, 82, 255, 0.15) 0%, transparent 55%),
                radial-gradient(ellipse at 70% 70%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
            pointer-events: none;
        }

        .article-hero .container {
            position: relative;
            z-index: 1;
            width: 100%;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: var(--text-tertiary);
            margin-bottom: 1.25rem;
        }

        .breadcrumb a {
            color: var(--text-tertiary);
            display: flex;
            align-items: center;
            gap: 0.35rem;
            transition: var(--transition);
        }

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

        .breadcrumb .separator {
            color: rgba(255, 255, 255, 0.25);
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: var(--accent-secondary);
            font-weight: 500;
            max-width: 280px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        @media (min-width: 768px) {
            .breadcrumb .current { max-width: 500px; }
        }

        .article-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1rem;
            border-radius: var(--radius-full);
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-secondary);
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 1rem;
            width: fit-content;
        }

        .article-tag i {
            font-size: 0.7rem;
        }

        .article-hero h1 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.03em;
            margin-bottom: 1rem;
            max-width: 820px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }

        @media (min-width: 768px) {
            .article-hero h1 {
                font-size: 2.4rem;
            }
        }

        @media (min-width: 1024px) {
            .article-hero h1 {
                font-size: 2.8rem;
            }
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1rem;
            color: var(--text-tertiary);
            font-size: 0.85rem;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .article-meta i {
            color: var(--accent-secondary);
            font-size: 0.85rem;
        }

        .article-meta .meta-divider {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.25);
        }

        /* ==================== ARTICLE BODY ==================== */
        .article-body-section {
            padding: 3rem 0 4rem;
            position: relative;
        }

        .article-body-wrapper {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            max-width: 860px;
            margin: 0 auto;
        }

        .article-content {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.75;
            letter-spacing: 0.01em;
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 2rem 0 0.75rem;
            letter-spacing: -0.02em;
        }

        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 1.75rem 0 0.6rem;
            letter-spacing: -0.02em;
        }

        .article-content p {
            margin-bottom: 1rem;
        }

        .article-content a {
            color: var(--accent-secondary);
            text-decoration: underline;
            text-decoration-color: rgba(0, 240, 255, 0.35);
            transition: var(--transition);
        }

        .article-content a:hover {
            text-decoration-color: var(--accent-secondary);
            color: #7df9ff;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.25rem 1.5rem;
            padding-left: 0;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.5rem;
            position: relative;
            padding-left: 0.25rem;
        }

        .article-content ul li::marker {
            color: var(--accent-secondary);
        }

        .article-content ol li::marker {
            color: var(--accent-secondary);
            font-weight: 600;
        }

        .article-content blockquote {
            border-left: 3px solid var(--accent-secondary);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: rgba(0, 240, 255, 0.04);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-secondary);
            font-style: italic;
            font-size: 0.95rem;
        }

        .article-content img {
            border-radius: var(--radius-lg);
            margin: 1.25rem 0;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.25rem 0;
            font-size: 0.9rem;
            background: var(--bg-secondary);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .article-content table th,
        .article-content table td {
            padding: 0.75rem 1rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-secondary);
        }

        .article-content table th {
            background: rgba(0, 82, 255, 0.1);
            color: var(--text-primary);
            font-weight: 700;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }

        .article-content table tr:last-child td {
            border-bottom: none;
        }

        .article-content code {
            background: rgba(255, 255, 255, 0.06);
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            font-size: 0.9em;
            font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
            color: var(--accent-secondary);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* Article not found */
        .article-not-found {
            text-align: center;
            padding: 3rem 1.5rem;
            background: var(--bg-secondary);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-color);
        }

        .article-not-found i {
            font-size: 3rem;
            color: var(--text-tertiary);
            margin-bottom: 1rem;
        }

        .article-not-found h2 {
            font-size: 1.5rem;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }

        .article-not-found p {
            color: var(--text-tertiary);
            margin-bottom: 1.5rem;
        }

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.5rem;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            box-shadow: var(--shadow-button);
            transition: var(--transition);
        }

        .btn-back-home:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-1px);
        }

        /* ==================== RELATED SECTION ==================== */
        .related-section {
            padding: 3rem 0 4rem;
            background: rgba(13, 17, 30, 0.5);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            margin-bottom: 2rem;
            max-width: 720px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-secondary);
            margin-bottom: 0.6rem;
        }

        .section-label::before {
            content: '';
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-secondary);
            box-shadow: 0 0 8px var(--accent-secondary);
        }

        .section-header h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin-bottom: 0.5rem;
        }

        @media (min-width: 768px) {
            .section-header h2 { font-size: 2rem; }
        }

        .section-header p {
            color: var(--text-tertiary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .related-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
        }

        @media (min-width: 768px) {
            .related-grid { grid-template-columns: repeat(3, 1fr); }
        }

        .related-card {
            background: var(--bg-glass);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            cursor: pointer;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.12), var(--shadow-card);
            transform: translateY(-3px);
        }

        .related-card .card-img {
            width: 100%;
            height: 170px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
            background: var(--bg-tertiary);
        }

        .related-card .card-body {
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .related-card .card-badge {
            display: inline-block;
            align-self: flex-start;
            padding: 0.25rem 0.7rem;
            border-radius: var(--radius-full);
            font-size: 0.7rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-secondary);
            border: 1px solid rgba(0, 240, 255, 0.2);
            margin-bottom: 0.6rem;
        }

        .related-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            line-height: 1.4;
            letter-spacing: -0.01em;
        }

        .related-card p {
            font-size: 0.85rem;
            color: var(--text-tertiary);
            line-height: 1.6;
            flex: 1;
        }

        /* ==================== FAQ SECTION ==================== */
        .faq-section {
            padding: 3rem 0 4rem;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
        }

        .faq-item {
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-item.active {
            border-color: var(--border-glow);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.08);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            width: 100%;
            padding: 1.1rem 1.25rem;
            text-align: left;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            transition: var(--transition);
        }

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

        .faq-question i {
            flex-shrink: 0;
            font-size: 0.85rem;
            color: var(--accent-secondary);
            transition: var(--transition);
        }

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

        .faq-answer {
            display: none;
            padding: 0 1.25rem 1.15rem;
            color: var(--text-tertiary);
            font-size: 0.9rem;
            line-height: 1.7;
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-answer {
            display: block;
            border-top-color: var(--border-color);
        }

        @media (min-width: 768px) {
            .faq-question { font-size: 1rem; padding: 1.2rem 1.5rem; }
            .faq-answer { font-size: 0.92rem; padding: 0 1.5rem 1.25rem; }
        }

        /* ==================== BOTTOM CTA ==================== */
        .bottom-cta-section {
            padding: 3.5rem 0;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.12) 0%, rgba(0, 240, 255, 0.05) 50%, rgba(0, 82, 255, 0.1) 100%);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .cta-bar {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.25rem;
            text-align: center;
        }

        @media (min-width: 768px) {
            .cta-bar {
                flex-direction: row;
                justify-content: space-between;
                text-align: left;
            }
        }

        .cta-bar-text h3 {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin-bottom: 0.4rem;
        }

        .cta-bar-text p {
            color: var(--text-tertiary);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .cta-bar-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }

        /* ==================== BUTTONS ==================== */
        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.7rem 1.6rem;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            box-shadow: var(--shadow-button);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-glow:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-1px);
        }

        .btn-glow:active {
            transform: scale(0.97);
        }

        .btn-glow-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.7rem 1.6rem;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent-secondary);
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.35);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-glow-outline:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--border-glow);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
            transform: translateY(-1px);
        }

        /* ==================== FAB ==================== */
        .fab-support {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 90;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 3.25rem;
            height: 3.25rem;
            min-width: 48px;
            min-height: 48px;
            border-radius: var(--radius-full);
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            position: relative;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: var(--transition);
            opacity: 0.6;
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab-support::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: var(--radius-full);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary), var(--accent-primary));
            background-size: 300% 300%;
            z-index: -1;
            animation: gradient-flow 3s linear infinite;
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
        }

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

        .fab-support i {
            font-size: 1.3rem;
            color: var(--accent-secondary);
            transition: var(--transition);
        }

        .fab-support:hover i {
            color: #fff;
            animation: icon-flicker 0.3s ease;
        }

        .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 12px;
            height: 12px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: notification-blink 1.5s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-4px); }
        }

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

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

        @keyframes icon-flicker {
            0% { opacity: 1; }
            30% { opacity: 0.4; }
            55% { opacity: 1; }
            75% { opacity: 0.6; }
            100% { opacity: 1; }
        }

        /* ==================== FOOTER ==================== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            margin-top: 0;
            position: relative;
            z-index: 5;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            padding: 2.5rem 0 1.5rem;
        }

        @media (min-width: 640px) {
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (min-width: 1024px) {
            .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; }
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.9rem;
            letter-spacing: -0.01em;
        }

        .footer-col p {
            color: var(--text-tertiary);
            font-size: 0.85rem;
            line-height: 1.7;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }

        .footer-col ul li a {
            color: var(--text-tertiary);
            font-size: 0.85rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
        }

        .footer-col ul li a:hover {
            color: var(--accent-secondary);
            transform: translateX(2px);
        }

        .footer-disclaimer {
            padding: 1.25rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            color: var(--text-tertiary);
            font-size: 0.78rem;
            line-height: 1.7;
            letter-spacing: 0.01em;
        }

        .footer-bottom {
            background: rgba(0, 0, 0, 0.3);
            padding: 1rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .footer-bottom span {
            color: var(--text-tertiary);
            font-size: 0.8rem;
        }

        .footer-bottom a {
            color: var(--accent-secondary);
            font-weight: 500;
        }

        .footer-bottom a:hover {
            text-decoration: underline;
        }

        /* ==================== RESPONSIVE ==================== */
        @media (max-width: 520px) {
            .nav-actions {
                gap: 0.4rem;
            }
            .btn-login {
                padding: 0.45rem 0.8rem;
                font-size: 0.75rem;
            }
            .btn-signup {
                padding: 0.45rem 0.9rem;
                font-size: 0.75rem;
            }
            .nav-logo-text {
                max-width: 130px;
                font-size: 0.8rem;
            }
            .nav-logo .logo-icon {
                width: 1.9rem;
                height: 1.9rem;
                font-size: 0.95rem;
            }
            .article-hero {
                padding-top: 6.5rem;
                min-height: 350px;
            }
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-meta {
                font-size: 0.75rem;
                gap: 0.6rem;
            }
            .cta-bar-actions {
                flex-direction: column;
                width: 100%;
            }
            .cta-bar-actions .btn-glow,
            .cta-bar-actions .btn-glow-outline {
                width: 100%;
            }
            .related-card .card-img {
                height: 140px;
            }
        }

        @media (max-width: 768px) {
            .btn-login,
            .btn-signup {
                display: inline-flex;
            }
            .article-body-wrapper {
                padding: 0 0.25rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-tertiary: #111827;
            --bg-glass: rgba(13, 17, 30, 0.55);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.35);
            --accent-glow-soft: rgba(0, 82, 255, 0.25);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-tertiary: #94A3B8;
            --border-color: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.45);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-full: 9999px;
            --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.15);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-button: 0 0 25px rgba(0, 82, 255, 0.35);
            --shadow-button-hover: 0 0 40px rgba(0, 240, 255, 0.55);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: var(--transition);
        }

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ==================== HEADER / NAV ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
            border-bottom-color: var(--border-glow);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            gap: 1rem;
            position: relative;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            min-width: 0;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .nav-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.2rem;
            height: 2.2rem;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
        }

        .nav-logo-text {
            display: inline-block;
            max-width: 200px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            font-size: 0.95rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            list-style: none;
        }

        .nav-links li a {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
            border-color: rgba(0, 240, 255, 0.15);
        }

        .nav-links li a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.1);
            border-color: rgba(0, 240, 255, 0.25);
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.12);
            white-space: nowrap;
        }

        .btn-login:hover {
            color: var(--text-primary);
            border-color: rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.05);
        }

        .btn-signup {
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            box-shadow: var(--shadow-button);
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            padding: 0.6rem;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 0.25rem;
            padding-bottom: 1rem;
        }

        .mobile-menu a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 1rem;
            border-radius: var(--radius-md);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid transparent;
            transition: var(--transition);
        }

        .mobile-menu a:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
            border-color: rgba(0, 240, 255, 0.15);
        }

        .mobile-menu a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.1);
            border-color: rgba(0, 240, 255, 0.25);
            font-weight: 600;
        }

        /* ==================== HERO ==================== */
        .hero-section {
            position: relative;
            padding: 7rem 0 4rem;
            background: radial-gradient(ellipse at 20% 20%, rgba(0, 82, 255, 0.18) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 70%, rgba(0, 240, 255, 0.12) 0%, transparent 50%),
                var(--bg-secondary);
            overflow: hidden;
            min-height: 90vh;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.22;
            pointer-events: none;
        }

        .hero-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 3rem;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.4rem 1rem;
            border-radius: var(--radius-full);
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid var(--border-glow);
            color: var(--accent-secondary);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.01em;
            margin-bottom: 1.25rem;
        }

        .hero-section h1 {
            font-size: 2.75rem;
            line-height: 1.2;
            font-weight: 900;
            letter-spacing: -0.03em;
            margin-bottom: 1rem;
            color: var(--text-primary);
            text-wrap: balance;
        }

        .hero-section h1 .gradient-text {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 540px;
            margin-bottom: 1.75rem;
            line-height: 1.65;
        }

        .hero-stats-row {
            display: flex;
            gap: 2.5rem;
            flex-wrap: wrap;
            margin-top: 2rem;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 0.15rem;
        }

        .hero-stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-secondary);
            letter-spacing: -0.02em;
        }

        .hero-stat-label {
            font-size: 0.8rem;
            color: var(--text-tertiary);
            font-weight: 500;
        }

        /* Coupon Wall */
        .coupon-wall {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            gap: 1rem;
            align-items: flex-end;
        }

        .coupon-main {
            width: 100%;
            max-width: 400px;
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-glow);
            background: var(--bg-glass);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: var(--shadow-glow), var(--shadow-card);
            transition: var(--transition);
        }

        .coupon-main:hover {
            box-shadow: 0 0 50px rgba(0, 240, 255, 0.3), 0 12px 40px rgba(0, 0, 0, 0.5);
            transform: translateY(-3px);
        }

        .coupon-main-header {
            padding: 1.5rem 1.5rem 1rem;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }

        .coupon-main-label {
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-secondary);
        }

        .coupon-main-badge {
            padding: 0.3rem 0.8rem;
            border-radius: var(--radius-full);
            background: rgba(0, 240, 255, 0.15);
            color: var(--accent-secondary);
            font-size: 0.7rem;
            font-weight: 700;
            border: 1px solid var(--border-glow);
        }

        .coupon-main-body {
            padding: 1.5rem;
        }

        .coupon-main-title {
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .coupon-main-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 1.25rem;
        }

        .coupon-code-box {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 0.75rem 1rem;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.08);
            border: 1px dashed var(--border-glow);
            margin-bottom: 1.25rem;
        }

        .coupon-code-text {
            font-size: 1rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            color: var(--accent-secondary);
            font-family: 'Courier New', monospace;
        }

        .coupon-copy-btn {
            padding: 0.4rem 0.9rem;
            border-radius: var(--radius-sm);
            font-size: 0.75rem;
            font-weight: 600;
            color: #fff;
            background: rgba(0, 240, 255, 0.2);
            border: 1px solid var(--border-glow);
            transition: var(--transition);
        }

        .coupon-copy-btn:hover {
            background: rgba(0, 240, 255, 0.35);
        }

        .coupon-claim-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            width: 100%;
            padding: 0.9rem 1.5rem;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            box-shadow: var(--shadow-button);
            transition: var(--transition);
            letter-spacing: 0.01em;
        }

        .coupon-claim-btn:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-1px);
        }

        .coupon-trust-row {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
            margin-top: 0.75rem;
            padding: 0.5rem;
            font-size: 0.75rem;
            color: var(--text-tertiary);
        }

        .coupon-trust-row i {
            color: var(--accent-secondary);
            margin-right: 0.25rem;
        }

        /* ==================== SECTION SHARED ==================== */
        .section {
            padding: 4rem 0;
            position: relative;
        }

        .section-header {
            margin-bottom: 2.5rem;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-secondary);
            margin-bottom: 0.6rem;
        }

        .section-title {
            font-size: 1.85rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
            line-height: 1.25;
        }

        .section-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.65;
        }

        /* ==================== STRATEGY CARDS ==================== */
        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .strategy-card {
            border-radius: var(--radius-xl);
            overflow: hidden;
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .strategy-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.18), var(--shadow-card);
            transform: translateY(-3px);
        }

        .strategy-card-img-wrap {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
        }

        .strategy-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .strategy-card:hover .strategy-card-img-wrap img {
            transform: scale(1.05);
        }

        .strategy-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(8, 9, 15, 0.8) 0%, rgba(8, 9, 15, 0.2) 50%, transparent 100%);
            pointer-events: none;
        }

        .strategy-card-icon {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            width: 2.2rem;
            height: 2.2rem;
            border-radius: var(--radius-sm);
            background: rgba(0, 240, 255, 0.2);
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-secondary);
            font-size: 0.9rem;
            backdrop-filter: blur(8px);
        }

        .strategy-card-body {
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            flex: 1;
        }

        .strategy-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .strategy-card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .strategy-card-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.7rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--accent-secondary);
            margin-top: auto;
            padding-top: 0.5rem;
        }

        /* ==================== SCENARIO SECTION ==================== */
        .scenario-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .scenario-timeline {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
            align-items: start;
        }

        .scenario-item {
            position: relative;
            padding-left: 2.5rem;
            padding-bottom: 2rem;
        }

        .scenario-item::before {
            content: '';
            position: absolute;
            left: 0.8rem;
            top: 2rem;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--border-glow), transparent);
        }

        .scenario-item:last-child::before {
            display: none;
        }

        .scenario-dot {
            position: absolute;
            left: 0;
            top: 0.2rem;
            width: 1.6rem;
            height: 1.6rem;
            border-radius: 50%;
            background: var(--bg-tertiary);
            border: 2px solid var(--accent-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.6rem;
            color: var(--accent-secondary);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
            z-index: 1;
        }

        .scenario-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.4rem;
        }

        .scenario-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ==================== TESTIMONIAL / EVIDENCE ==================== */
        .evidence-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .evidence-card {
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            backdrop-filter: blur(14px);
            transition: var(--transition);
        }

        .evidence-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.12);
        }

        .evidence-stars {
            display: flex;
            gap: 0.3rem;
            color: #FFD700;
            font-size: 0.85rem;
            margin-bottom: 0.75rem;
        }

        .evidence-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 1rem;
        }

        .evidence-author {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }

        .evidence-avatar {
            width: 2.2rem;
            height: 2.2rem;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.8rem;
            color: #fff;
            flex-shrink: 0;
        }

        .evidence-name {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .evidence-role {
            font-size: 0.72rem;
            color: var(--text-tertiary);
        }

        /* ==================== PRICING ==================== */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
            align-items: stretch;
        }

        .pricing-card {
            border-radius: var(--radius-xl);
            padding: 2rem;
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            backdrop-filter: blur(16px);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
            position: relative;
        }

        .pricing-card.featured {
            border-color: var(--border-glow);
            background: rgba(0, 240, 255, 0.06);
            box-shadow: var(--shadow-glow);
        }

        .pricing-card.featured::before {
            content: 'ĐƯỢC CHỌN NHIỀU NHẤT';
            position: absolute;
            top: -0.8rem;
            left: 50%;
            transform: translateX(-50%);
            padding: 0.3rem 1.2rem;
            border-radius: var(--radius-full);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            font-size: 0.65rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: #fff;
            white-space: nowrap;
            box-shadow: var(--shadow-button);
        }

        .pricing-title {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-primary);
        }

        .pricing-amount {
            font-size: 2.5rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            color: var(--text-primary);
        }

        .pricing-amount span {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-tertiary);
            letter-spacing: 0;
        }

        .pricing-features {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .pricing-features li {
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .pricing-features li i {
            color: var(--accent-secondary);
            margin-top: 0.2rem;
            font-size: 0.75rem;
        }

        .pricing-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            padding: 0.8rem 1.5rem;
            border-radius: var(--radius-md);
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid var(--border-glow);
            transition: var(--transition);
        }

        .pricing-btn:hover {
            background: rgba(0, 240, 255, 0.3);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }

        .pricing-card.featured .pricing-btn {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            box-shadow: var(--shadow-button);
        }

        .pricing-card.featured .pricing-btn:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-1px);
        }

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

        .faq-item {
            border-radius: var(--radius-lg);
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.1rem 1.5rem;
            cursor: pointer;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            width: 100%;
            transition: var(--transition);
        }

        .faq-question i {
            color: var(--accent-secondary);
            font-size: 0.8rem;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            display: none;
            padding: 0 1.5rem 1.1rem;
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* ==================== CTA ==================== */
        .cta-section {
            position: relative;
            padding: 4rem 0;
            overflow: hidden;
            background: radial-gradient(ellipse at 50% 0%, rgba(0, 240, 255, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 50% 100%, rgba(0, 82, 255, 0.15) 0%, transparent 60%),
                var(--bg-secondary);
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
            line-height: 1.25;
        }

        .cta-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            line-height: 1.65;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.95rem 2.2rem;
            border-radius: var(--radius-full);
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            box-shadow: var(--shadow-button);
            transition: var(--transition);
            letter-spacing: 0.01em;
        }

        .cta-btn:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-2px);
        }

        /* ==================== FAB ==================== */
        .fab-left {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 90;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .fab-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            min-width: 48px;
            min-height: 48px;
            padding: 0.6rem 1rem;
            border-radius: var(--radius-full);
            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, #CCFF00, #00F0FF);
            background-clip: padding-box, border-box;
            background-origin: padding-box, border-box;
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            position: relative;
            opacity: 0.75;
            white-space: nowrap;
        }

        .fab-btn:hover {
            opacity: 1;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
            transform: scale(1.05);
        }

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

        .fab-btn .fab-icon {
            font-size: 1.1rem;
            color: #CCFF00;
        }

        .fab-notification {
            position: absolute;
            top: -0.3rem;
            right: -0.3rem;
            width: 1.2rem;
            height: 1.2rem;
            border-radius: 50%;
            background: #FF007F;
            color: #fff;
            font-size: 0.55rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            animation: fabBreathe 2s ease-in-out infinite;
            border: 2px solid #08090F;
        }

        @keyframes fabBreathe {
            0%, 100% { opacity: 0.6; transform: scale(1); }
            50% { opacity: 1; transform: scale(1.15); }
        }

        @keyframes fabPulse {
            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); }
        }

        .fab-btn {
            animation: fabPulse 3s ease-in-out infinite;
        }

        /* ==================== FOOTER ==================== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-color);
            padding-top: 3rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 2rem;
            padding-bottom: 2rem;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.9rem;
        }

        .footer-col p {
            font-size: 0.82rem;
            color: var(--text-tertiary);
            line-height: 1.6;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-col ul a {
            font-size: 0.82rem;
            color: var(--text-tertiary);
            transition: var(--transition);
        }

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

        .footer-disclaimer {
            padding: 1rem 0;
            border-top: 1px solid var(--border-color);
            font-size: 0.7rem;
            color: var(--text-tertiary);
            line-height: 1.6;
            text-align: justify;
        }

        .footer-bottom {
            padding: 1rem 0;
            background: rgba(0, 0, 0, 0.4);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .footer-bottom span {
            font-size: 0.75rem;
            color: var(--text-tertiary);
        }

        .footer-bottom a {
            color: var(--accent-secondary);
            font-weight: 600;
        }

        .footer-bottom a:hover {
            text-decoration: underline;
        }

        /* ==================== RESPONSIVE ==================== */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 0.2rem;
            }

            .nav-links li a {
                padding: 0.5rem 0.7rem;
                font-size: 0.82rem;
            }

            .hero-section h1 {
                font-size: 2.2rem;
            }

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

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

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

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

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

            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                display: inline-block;
                font-size: 0.7rem;
                padding: 0.4rem 0.7rem;
            }

            .nav-logo-text {
                max-width: 150px;
                font-size: 0.8rem;
            }

            .hero-section {
                padding: 5.5rem 0 3rem;
                min-height: auto;
            }

            .hero-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .hero-section h1 {
                font-size: 1.75rem;
                line-height: 1.25;
            }

            .hero-subtitle {
                font-size: 0.9rem;
            }

            .coupon-wall {
                align-items: stretch;
            }

            .coupon-main {
                max-width: 100%;
            }

            .strategy-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }

            .scenario-timeline {
                grid-template-columns: 1fr;
                gap: 1rem;
            }

            .evidence-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }

            .pricing-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .section {
                padding: 2.5rem 0;
            }

            .section-title {
                font-size: 1.45rem;
            }

            .faq-question {
                font-size: 0.85rem;
                padding: 1rem 1.1rem;
            }

            .faq-answer {
                padding: 0 1.1rem 1rem;
                font-size: 0.8rem;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .fab-left {
                left: 0.6rem;
                bottom: 5rem;
            }

            .fab-btn {
                min-width: 44px;
                min-height: 44px;
                padding: 0.5rem 0.7rem;
                font-size: 0.7rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }

            .nav-wrapper {
                padding: 0.6rem 0;
                gap: 0.5rem;
            }

            .nav-logo-text {
                max-width: 110px;
                font-size: 0.72rem;
            }

            .nav-logo .logo-icon {
                width: 1.8rem;
                height: 1.8rem;
                font-size: 0.85rem;
            }

            .nav-actions {
                gap: 0.35rem;
            }

            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                font-size: 0.62rem;
                padding: 0.3rem 0.55rem;
            }

            .hero-stats-row {
                gap: 1.25rem;
            }

            .hero-stat-num {
                font-size: 1.4rem;
            }

            .hero-stat-label {
                font-size: 0.7rem;
            }

            .coupon-main-title {
                font-size: 1.1rem;
            }

            .pricing-card {
                padding: 1.25rem;
            }

            .pricing-amount {
                font-size: 1.8rem;
            }

            .pricing-card.featured::before {
                font-size: 0.55rem;
                padding: 0.25rem 0.8rem;
            }
        }