/* roulang page: index */
/* ============================================
           DESIGN SYSTEM - Royal Dark VIP Lounge
           ============================================ */
        :root {
            --bg-primary: #121212;
            --bg-secondary: #1C1C1E;
            --bg-card: #1A1A1E;
            --bg-elevated: #222226;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --accent-muted-gold: #D4AC0D;
            --accent-deep-gold: #8C7340;
            --text-primary: #F5F5F7;
            --text-secondary: #C7C7CE;
            --text-muted: #8E8E96;
            --border-subtle: #2C2C32;
            --border-gold: rgba(197, 160, 89, 0.35);
            --success: #2ECC71;
            --danger: #E74C3C;
            --info: #5DADE2;
            --border-radius-sm: 8px;
            --border-radius-md: 14px;
            --border-radius-lg: 20px;
            --border-radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
            --shadow-gold: 0 4px 20px rgba(197,160,89,0.25);
            --font-sans: 'Be Vietnam Pro', 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-serif: 'Playfair Display', 'Times New Roman', Georgia, serif;
            --max-width: 1140px;
            --header-height: 72px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --radius-pill: 999px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        ul, ol {
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 700;
            letter-spacing: -0.01em;
        }

        h1 {
            font-size: clamp(1.8rem, 4.5vw, 3rem);
            font-weight: 800;
            line-height: 1.2;
        }

        h2 {
            font-size: clamp(1.4rem, 3vw, 2rem);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 0.8rem;
        }

        h3 {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* Container */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ============================================
           HEADER / NAVIGATION
           ============================================ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(18, 18, 18, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            height: var(--header-height);
            transition: box-shadow var(--transition-base), background var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0,0,0,0.5);
            background: rgba(18, 18, 18, 0.97);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            min-width: 0;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #1a1a1a;
            font-weight: 800;
            flex-shrink: 0;
            box-shadow: var(--shadow-gold);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            min-width: 0;
        }

        .brand-name {
            font-size: 0.9rem;
            font-weight: 800;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            letter-spacing: -0.01em;
        }

        .brand-sub {
            font-size: 0.7rem;
            color: var(--accent-muted-gold);
            white-space: nowrap;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }

        .main-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .main-nav a:hover {
            color: var(--text-primary);
            background: rgba(255,255,255,0.06);
        }

        .main-nav a.active {
            color: var(--accent-amber);
            background: rgba(255,191,0,0.1);
            font-weight: 600;
        }

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

        .btn-login {
            padding: 9px 20px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            background: transparent;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            color: var(--text-primary);
            border-color: var(--accent-gold);
        }

        .btn-signup {
            padding: 9px 22px;
            font-size: 0.85rem;
            font-weight: 700;
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border-radius: var(--radius-pill);
            transition: all var(--transition-base);
            white-space: nowrap;
            display: inline-block;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255,191,0,0.35);
            color: #1a1a1a;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            cursor: pointer;
            z-index: 1001;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

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

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(18, 18, 18, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 20px;
            z-index: 999;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }

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

        .mobile-nav a {
            padding: 14px 18px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 10px;
            transition: all var(--transition-fast);
            display: block;
        }

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

        .mobile-nav a.active {
            color: var(--accent-amber);
            background: rgba(255,191,0,0.1);
        }

        .mobile-nav .mobile-actions {
            display: flex;
            gap: 10px;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
        }

        .mobile-nav .btn-login,
        .mobile-nav .btn-signup {
            flex: 1;
            text-align: center;
        }

        /* ============================================
           HERO SECTION
           ============================================ */
        .hero {
            position: relative;
            padding: calc(var(--header-height) + 60px) 0 80px;
            min-height: 600px;
            display: flex;
            align-items: center;
            background: var(--bg-primary);
            overflow: hidden;
        }

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

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(18,18,18,0.3) 0%, rgba(18,18,18,0.7) 50%, rgba(18,18,18,0.95) 100%);
            z-index: 1;
        }

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

        .hero-inner {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 50px;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: rgba(197, 160, 89, 0.15);
            border: 1px solid rgba(197, 160, 89, 0.35);
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-muted-gold);
            margin-bottom: 20px;
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }

        .hero-badge i {
            font-size: 0.9rem;
        }

        .hero h1 {
            color: var(--text-primary);
            margin-bottom: 20px;
            max-width: 600px;
        }

        .hero h1 .highlight {
            color: var(--accent-amber);
            display: block;
            font-size: 0.7em;
            font-weight: 600;
            letter-spacing: 0.02em;
            margin-top: 8px;
        }

        .hero-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 520px;
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .hero-ctas {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            font-size: 0.95rem;
            font-weight: 700;
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border-radius: var(--radius-pill);
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(255,191,0,0.3);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(255,191,0,0.45);
            color: #1a1a1a;
        }

        .btn-primary:active {
            transform: translateY(-1px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 2px solid var(--border-gold);
            border-radius: var(--radius-pill);
            transition: all var(--transition-base);
        }

        .btn-outline:hover {
            border-color: var(--accent-amber);
            color: var(--accent-amber);
            transform: translateY(-3px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 32px;
        }

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

        .hero-stat-value {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-amber);
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: 0.78rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }

        /* Hero progress ring */
        .hero-right {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }

        .progress-ring-wrap {
            width: 200px;
            height: 200px;
            position: relative;
        }

        .progress-ring {
            width: 100%;
            height: 100%;
        }

        .progress-ring-bg {
            fill: none;
            stroke: #2a2a30;
            stroke-width: 8;
        }

        .progress-ring-fill {
            fill: none;
            stroke: url(#goldGradient);
            stroke-width: 8;
            stroke-linecap: round;
            stroke-dasharray: 565.48;
            stroke-dashoffset: 141.37;
            animation: ringLoad 1.5s ease-out forwards;
        }

        @keyframes ringLoad {
            from { stroke-dashoffset: 565.48; }
            to { stroke-dashoffset: 141.37; }
        }

        .progress-ring-center {
            position: absolute;
            inset: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
        }

        .progress-ring-value {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1;
        }

        .progress-ring-unit {
            font-size: 0.78rem;
            color: var(--accent-muted-gold);
            text-transform: uppercase;
            letter-spacing: 0.1em;
        }

        .hero-tier-preview {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            justify-content: center;
            width: 100%;
        }

        .tier-chip {
            padding: 8px 16px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
        }

        .tier-chip:hover {
            border-color: var(--accent-gold);
            color: var(--accent-amber);
        }

        /* ============================================
           SECTION COMMON
           ============================================ */
        .section {
            padding: 64px 0;
            position: relative;
        }

        .section-alt {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent-muted-gold);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 10px;
        }

        .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--accent-gold);
            display: inline-block;
        }

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

        /* ============================================
           ROADMAP / PROGRESS SECTION
           ============================================ */
        .roadmap-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }

        .roadmap-step {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            padding: 24px 20px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .roadmap-step::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--accent-gold), transparent);
        }

        .roadmap-step:hover {
            border-color: var(--border-gold);
            transform: translateY(-4px);
            box-shadow: var(--shadow-gold);
        }

        .roadmap-step-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-amber);
            line-height: 1;
            margin-bottom: 12px;
            opacity: 0.9;
        }

        .roadmap-step h3 {
            font-size: 1rem;
            margin-bottom: 6px;
        }

        .roadmap-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .roadmap-step .step-status {
            display: inline-block;
            margin-top: 10px;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }

        .step-status.done {
            background: rgba(46,204,113,0.15);
            color: var(--success);
        }

        .step-status.current {
            background: rgba(255,191,0,0.15);
            color: var(--accent-amber);
        }

        .step-status.pending {
            background: rgba(140,140,150,0.15);
            color: var(--text-muted);
        }

        /* ============================================
           EXPLANATION / CONTENT CARDS
           ============================================ */
        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            padding: 28px 24px;
            margin-bottom: 20px;
            transition: all var(--transition-base);
        }

        .content-card:hover {
            border-color: var(--border-gold);
        }

        .content-card h3 {
            color: var(--text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .content-card h3 i {
            color: var(--accent-gold);
            font-size: 1.1rem;
        }

        .content-card p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .highlight-box {
            background: rgba(197, 160, 89, 0.08);
            border-left: 4px solid var(--accent-gold);
            padding: 16px 20px;
            border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
            margin: 16px 0;
        }

        .highlight-box p {
            margin-bottom: 0;
            font-weight: 500;
            color: var(--text-primary);
        }

        /* Bet case cards */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .case-card {
            background: var(--bg-elevated);
            border-radius: var(--border-radius-md);
            padding: 24px;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-base);
            text-align: left;
        }

        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .case-card.win-tai {
            border-top: 4px solid var(--success);
        }

        .case-card.draw {
            border-top: 4px solid var(--accent-gold);
        }

        .case-card.win-xiu {
            border-top: 4px solid var(--info);
        }

        .case-card .case-tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 0.72rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
        }

        .win-tai .case-tag {
            background: rgba(46,204,113,0.15);
            color: var(--success);
        }

        .draw .case-tag {
            background: rgba(255,191,0,0.15);
            color: var(--accent-amber);
        }

        .win-xiu .case-tag {
            background: rgba(93,173,226,0.15);
            color: var(--info);
        }

        .case-card h3 {
            font-size: 1rem;
            margin-bottom: 8px;
        }

        .case-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .case-card .case-score {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        /* ============================================
           TIER / PACKAGE SECTION
           ============================================ */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }

        .tier-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-lg);
            padding: 28px 24px;
            text-align: left;
            transition: all var(--transition-base);
            position: relative;
        }

        .tier-card:hover {
            border-color: var(--border-gold);
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .tier-card.featured {
            border-color: var(--accent-gold);
            background: linear-gradient(135deg, rgba(197,160,89,0.08), var(--bg-card));
        }

        .tier-card .tier-name {
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--accent-muted-gold);
            margin-bottom: 8px;
        }

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

        .tier-card ul {
            margin-bottom: 16px;
        }

        .tier-card ul li {
            font-size: 0.85rem;
            color: var(--text-secondary);
            padding: 6px 0;
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .tier-card ul li:last-child {
            border-bottom: none;
        }

        .tier-card ul li i {
            color: var(--accent-gold);
            font-size: 0.8rem;
            flex-shrink: 0;
        }

        .tier-card .btn-outline {
            width: 100%;
            justify-content: center;
            padding: 10px 20px;
            font-size: 0.85rem;
        }

        /* ============================================
           TESTIMONIALS / SOCIAL PROOF
           ============================================ */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            padding: 24px;
            transition: all var(--transition-base);
        }

        .testimonial-card:hover {
            border-color: var(--border-gold);
        }

        .testimonial-stars {
            display: flex;
            gap: 2px;
            margin-bottom: 12px;
            color: var(--accent-amber);
            font-size: 0.9rem;
        }

        .testimonial-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            font-style: italic;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .testimonial-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #1a1a1a;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .testimonial-name {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
        }

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

        /* ============================================
           CMS LIST / NEWS SECTION
           ============================================ */
        .news-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 0;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            overflow: hidden;
        }

        .news-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            border-bottom: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

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

        .news-item:hover {
            background: rgba(255,255,255,0.03);
        }

        .news-item-left {
            display: flex;
            align-items: center;
            gap: 14px;
            min-width: 0;
            flex-shrink: 1;
        }

        .news-item-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(197,160,89,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            flex-shrink: 0;
            font-size: 0.9rem;
        }

        .news-item-title {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            min-width: 0;
            transition: all var(--transition-fast);
        }

        .news-item:hover .news-item-title {
            color: var(--accent-amber);
        }

        .news-item-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .news-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .news-category {
            font-size: 0.7rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            background: rgba(255,191,0,0.1);
            color: var(--accent-amber);
            white-space: nowrap;
        }

        .news-empty {
            padding: 40px 20px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-base);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            transition: all var(--transition-fast);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }

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

        .faq-question .fa-chevron-down {
            transition: transform var(--transition-base);
            flex-shrink: 0;
            color: var(--accent-gold);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
        }

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

        /* ============================================
           CTA SECTION
           ============================================ */
        .cta-section {
            background: linear-gradient(135deg, rgba(197,160,89,0.12), rgba(255,191,0,0.06));
            border: 1px solid var(--border-gold);
            border-radius: var(--border-radius-xl);
            padding: 48px 32px;
            text-align: center;
            margin: 20px 0;
        }

        .cta-section h2 {
            margin-bottom: 12px;
        }

        .cta-section p {
            max-width: 500px;
            margin: 0 auto 24px;
            font-size: 0.95rem;
        }

        /* ============================================
           FOOTER
           ============================================ */
        .site-footer {
            background: #0e0e10;
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand {
            max-width: 300px;
        }

        .footer-brand .brand {
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

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

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

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

        .footer-copyright {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .footer-disclaimer {
            font-size: 0.72rem;
            color: var(--text-muted);
            max-width: 500px;
            line-height: 1.6;
        }

        /* ============================================
           FAB (Floating Action Button)
           ============================================ */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid;
            border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #00F0FF;
            font-size: 1.3rem;
            cursor: pointer;
            opacity: 0.6;
            box-shadow: 0 0 15px rgba(0,240,255,0.5);
            transition: all var(--transition-base);
            animation: fabFloat 3s ease-in-out infinite;
            text-decoration: none;
        }

        .fab::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            padding: 2px;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0,240,255,0.7);
            color: #00F0FF;
        }

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

        .fab .fab-dot {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #FF007F;
            animation: dotBlink 1.5s ease-in-out infinite;
        }

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

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

        /* ============================================
           RESPONSIVE
           ============================================ */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 36px;
                text-align: left;
            }
            .hero-right {
                flex-direction: row;
                justify-content: flex-start;
                gap: 30px;
                flex-wrap: wrap;
            }
            .progress-ring-wrap {
                width: 160px;
                height: 160px;
            }
            .progress-ring-value {
                font-size: 2rem;
            }
            .hero-tier-preview {
                justify-content: flex-start;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-actions {
                display: none;
            }
            .header-inner {
                gap: 10px;
            }
            .section {
                padding: 44px 0;
            }
            .hero {
                padding: calc(var(--header-height) + 40px) 0 50px;
                min-height: 500px;
            }
            .hero-right {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-tier-preview {
                justify-content: flex-start;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .tier-grid {
                grid-template-columns: 1fr;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .news-item-meta {
                width: 100%;
                justify-content: space-between;
            }
            .roadmap-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            :root {
                --header-height: 62px;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
            .brand-name {
                font-size: 0.78rem;
            }
            .brand-sub {
                font-size: 0.62rem;
            }
            h1 {
                font-size: 1.5rem;
            }
            .hero h1 .highlight {
                font-size: 0.75em;
            }
            .hero-sub {
                font-size: 0.9rem;
            }
            .btn-primary, .btn-outline {
                padding: 12px 22px;
                font-size: 0.85rem;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stat-value {
                font-size: 1.3rem;
            }
            .progress-ring-wrap {
                width: 130px;
                height: 130px;
            }
            .progress-ring-value {
                font-size: 1.6rem;
            }
            .section-header {
                margin-bottom: 24px;
            }
            .content-card {
                padding: 20px 16px;
            }
            .case-card {
                padding: 18px;
            }
            .tier-card {
                padding: 20px 16px;
            }
            .testimonial-card {
                padding: 18px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.88rem;
            }
            .faq-answer-inner {
                padding: 0 16px 16px;
                font-size: 0.82rem;
            }
            .fab {
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
                left: 12px;
                bottom: 80px;
            }
        }

        @media (max-width: 380px) {
            .brand-name {
                max-width: 140px;
                font-size: 0.7rem;
            }
            .hero-tier-preview {
                gap: 6px;
            }
            .tier-chip {
                padding: 6px 10px;
                font-size: 0.7rem;
            }
            .hero-stats {
                gap: 10px;
            }
            .progress-ring-wrap {
                width: 110px;
                height: 110px;
            }
            .progress-ring-value {
                font-size: 1.3rem;
            }
        }

        /* Focus states */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-amber);
            outline-offset: 2px;
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-primary);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--accent-deep-gold);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent-gold);
        }

/* roulang page: article */
:root {
            --bg-primary: #121212;
            --bg-secondary: #1C1C1E;
            --bg-card: #1A1A1E;
            --bg-elevated: #222226;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --accent-muted-gold: #D4AC0D;
            --accent-deep-gold: #8C7340;
            --text-primary: #F5F5F7;
            --text-secondary: #C7C7CE;
            --text-muted: #8E8E96;
            --border-subtle: #2C2C32;
            --border-gold: rgba(197, 160, 89, 0.35);
            --success: #2ECC71;
            --danger: #E74C3C;
            --info: #5DADE2;
            --border-radius-sm: 8px;
            --border-radius-md: 14px;
            --border-radius-lg: 20px;
            --border-radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
            --shadow-gold: 0 4px 20px rgba(197,160,89,0.25);
            --font-sans: 'Be Vietnam Pro', 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-serif: 'Playfair Display', 'Times New Roman', Georgia, serif;
            --max-width: 1140px;
            --header-height: 72px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --radius-pill: 999px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(18, 18, 18, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            height: var(--header-height);
            transition: box-shadow var(--transition-base), background var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0,0,0,0.5);
            background: rgba(18, 18, 18, 0.97);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            min-width: 0;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #1a1a1a;
            font-weight: 800;
            flex-shrink: 0;
            box-shadow: var(--shadow-gold);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            min-width: 0;
        }

        .brand-name {
            font-size: 0.9rem;
            font-weight: 800;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            letter-spacing: -0.01em;
        }

        .brand-sub {
            font-size: 0.7rem;
            color: var(--accent-muted-gold);
            white-space: nowrap;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }

        .main-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .main-nav a:hover {
            color: var(--text-primary);
            background: rgba(255,255,255,0.06);
        }

        .main-nav a.active {
            color: var(--accent-amber);
            background: rgba(197,160,89,0.12);
            font-weight: 600;
        }

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

        .btn-login,
        .btn-signup {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login {
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border-subtle);
        }

        .btn-login:hover {
            color: var(--text-primary);
            border-color: var(--accent-gold);
        }

        .btn-signup {
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            box-shadow: var(--shadow-gold);
        }

        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(197,160,89,0.4);
            color: #1a1a1a;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: transparent;
        }

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

        /* Main */
        main {
            padding-top: var(--header-height);
            min-height: calc(100vh - var(--header-height));
        }

        /* Article Hero */
        .article-hero {
            position: relative;
            background: url('/assets/images/coverpic/cover-1.jpg') center/cover no-repeat;
            padding: 90px 0 60px;
            border-bottom: 1px solid var(--border-subtle);
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(18,18,18,0.85) 0%, rgba(18,18,18,0.95) 100%);
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .divider {
            color: var(--accent-deep-gold);
        }

        .article-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            max-width: 900px;
            margin-bottom: 20px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

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

        .article-meta-item i {
            color: var(--accent-gold);
        }

        .article-meta .tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(197,160,89,0.15);
            color: var(--accent-amber);
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.8rem;
            letter-spacing: 0.02em;
        }

        /* Article Body Wrapper */
        .article-body-wrapper {
            padding: 60px 0;
        }

        .article-body {
            max-width: 820px;
            margin: 0 auto;
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        .article-body h2,
        .article-body h3,
        .article-body h4 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.35;
            margin: 1.8em 0 0.8em;
        }

        .article-body h2 {
            font-size: 1.7rem;
            letter-spacing: -0.01em;
        }

        .article-body h3 {
            font-size: 1.4rem;
        }

        .article-body h4 {
            font-size: 1.15rem;
        }

        .article-body p {
            margin-bottom: 1.2em;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 1.5em 1.5em;
            padding-left: 1em;
        }

        .article-body li {
            margin-bottom: 0.6em;
        }

        .article-body blockquote {
            margin: 2em 0;
            padding: 20px 24px;
            background: var(--bg-elevated);
            border-left: 4px solid var(--accent-gold);
            border-radius: var(--border-radius-sm);
            color: var(--text-primary);
            font-style: italic;
        }

        .article-body img {
            border-radius: var(--border-radius-md);
            margin: 2em auto;
            box-shadow: var(--shadow-md);
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 2em 0;
            background: var(--bg-card);
            border-radius: var(--border-radius-md);
            overflow: hidden;
        }

        .article-body table th,
        .article-body table td {
            padding: 14px 18px;
            text-align: left;
            border-bottom: 1px solid var(--border-subtle);
        }

        .article-body table th {
            background: var(--bg-elevated);
            color: var(--accent-amber);
            font-weight: 600;
        }

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

        .not-found-message {
            max-width: 820px;
            margin: 60px auto;
            padding: 40px;
            text-align: center;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-lg);
        }

        .not-found-message i {
            font-size: 2.5rem;
            color: var(--accent-muted-gold);
            margin-bottom: 20px;
        }

        .not-found-message h2 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }

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

        /* Quick Summary Section */
        .quick-summary {
            max-width: 820px;
            margin: 0 auto 60px;
            padding: 36px;
            background: var(--bg-card);
            border: 1px solid var(--border-gold);
            border-radius: var(--border-radius-lg);
            box-shadow: var(--shadow-md);
        }

        .quick-summary h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .quick-summary h2 i {
            color: var(--accent-gold);
        }

        .quick-summary-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .summary-card {
            padding: 16px 18px;
            background: var(--bg-elevated);
            border-radius: var(--border-radius-sm);
            border-left: 3px solid var(--accent-gold);
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.5;
        }

        .summary-card strong {
            color: var(--text-primary);
            display: block;
            margin-bottom: 6px;
            font-size: 0.9rem;
        }

        /* FAQ Section */
        .faq-section {
            padding: 70px 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .faq-section .section-header {
            max-width: 820px;
            margin: 0 auto 40px;
        }

        .faq-section .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }

        .faq-section .section-header p {
            color: var(--text-muted);
            margin-top: 10px;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

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

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-primary);
            font-size: 1rem;
            background: transparent;
            width: 100%;
            text-align: left;
        }

        .faq-question i {
            color: var(--accent-gold);
            transition: transform var(--transition-fast);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 22px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 22px 22px;
        }

        /* Related Articles */
        .related-section {
            padding: 70px 0;
            background: var(--bg-primary);
        }

        .related-section .section-header {
            max-width: 820px;
            margin: 0 auto 40px;
        }

        .related-section .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: block;
        }

        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-gold);
            box-shadow: var(--shadow-gold);
        }

        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: transform var(--transition-base);
        }

        .related-card:hover img {
            transform: scale(1.03);
        }

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

        .related-card-body .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-amber);
            background: rgba(197,160,89,0.12);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
        }

        .related-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            transition: color var(--transition-fast);
        }

        .related-card:hover .related-card-body h3 {
            color: var(--accent-gold);
        }

        .related-card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 8px;
            line-height: 1.5;
        }

        /* CTA Section */
        .cta-section {
            padding: 80px 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            position: relative;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(18,18,18,0.88);
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .cta-section p {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 32px;
        }

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

        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 700;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            color: #1a1a1a;
            box-shadow: var(--shadow-gold);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(197,160,89,0.5);
            color: #1a1a1a;
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--accent-gold);
        }

        .btn-secondary:hover {
            background: rgba(197,160,89,0.1);
            color: var(--accent-amber);
        }

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

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

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 16px;
            line-height: 1.6;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            margin-top: 40px;
            padding-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-copyright {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .footer-disclaimer {
            color: var(--text-muted);
            font-size: 0.8rem;
            line-height: 1.5;
            max-width: 800px;
        }

        /* Media Queries */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(18, 18, 18, 0.98);
                flex-direction: column;
                padding: 20px;
                gap: 8px;
                transform: translateY(-120%);
                transition: transform var(--transition-base);
                border-bottom: 1px solid var(--border-subtle);
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .main-nav a {
                width: 100%;
                text-align: left;
                padding: 12px 16px;
                font-size: 1rem;
            }

            .nav-actions {
                gap: 8px;
            }

            .btn-login,
            .btn-signup {
                padding: 8px 14px;
                font-size: 0.8rem;
            }

            .nav-toggle {
                display: flex;
            }

            .article-hero h1 {
                font-size: 1.8rem;
            }

            .quick-summary-grid {
                grid-template-columns: 1fr;
            }

            .related-grid {
                grid-template-columns: 1fr;
                max-width: 500px;
            }

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

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

        @media (max-width: 520px) {
            .header-inner {
                gap: 10px;
            }

            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }

            .brand-name {
                font-size: 0.8rem;
            }

            .brand-sub {
                font-size: 0.6rem;
            }

            .nav-actions {
                display: none;
            }

            .article-hero {
                padding: 60px 0 40px;
            }

            .article-hero h1 {
                font-size: 1.5rem;
            }

            .article-body-wrapper {
                padding: 40px 0;
            }

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

            .quick-summary,
            .faq-section,
            .related-section,
            .cta-section {
                padding: 50px 0;
            }

            .cta-buttons {
                flex-direction: column;
                width: 100%;
            }

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

/* roulang page: category1 */
:root {
            --bg-primary: #121212;
            --bg-secondary: #1C1C1E;
            --bg-card: #1A1A1E;
            --bg-elevated: #222226;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --accent-muted-gold: #D4AC0D;
            --accent-deep-gold: #8C7340;
            --text-primary: #F5F5F7;
            --text-secondary: #C7C7CE;
            --text-muted: #8E8E96;
            --border-subtle: #2C2C32;
            --border-gold: rgba(197, 160, 89, 0.35);
            --success: #2ECC71;
            --danger: #E74C3C;
            --info: #5DADE2;
            --border-radius-sm: 8px;
            --border-radius-md: 14px;
            --border-radius-lg: 20px;
            --border-radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
            --shadow-gold: 0 4px 20px rgba(197,160,89,0.25);
            --font-sans: 'Be Vietnam Pro', 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-serif: 'Playfair Display', 'Times New Roman', Georgia, serif;
            --max-width: 1140px;
            --header-height: 72px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --radius-pill: 999px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ============================================
           HEADER / NAVIGATION
           ============================================ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(18, 18, 18, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            height: var(--header-height);
            transition: box-shadow var(--transition-base), background var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0,0,0,0.5);
            background: rgba(18, 18, 18, 0.97);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            min-width: 0;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #1a1a1a;
            font-weight: 800;
            flex-shrink: 0;
            box-shadow: var(--shadow-gold);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            min-width: 0;
        }

        .brand-name {
            font-size: 0.9rem;
            font-weight: 800;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            letter-spacing: -0.01em;
        }

        .brand-sub {
            font-size: 0.7rem;
            color: var(--accent-muted-gold);
            white-space: nowrap;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }

        .main-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .main-nav a:hover {
            color: var(--text-primary);
            background: rgba(255,255,255,0.06);
        }

        .main-nav a.active {
            color: var(--accent-amber);
            background: rgba(197,160,89,0.10);
        }

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

        .btn-login {
            padding: 8px 16px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-primary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            border-color: var(--accent-gold);
            color: var(--accent-amber);
        }

        .btn-signup {
            padding: 8px 20px;
            font-size: 0.88rem;
            font-weight: 700;
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-gold);
        }

        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(197,160,89,0.4);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--bg-elevated);
            border: 1px solid var(--border-subtle);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-primary);
            margin: 0 auto;
            transition: var(--transition-fast);
        }

        /* ============================================
           PAGE HERO
           ============================================ */
        .page-hero {
            padding: calc(var(--header-height) + 40px) 0 60px;
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-subtle);
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at top right, rgba(197,160,89,0.08), transparent 60%);
            pointer-events: none;
        }

        .page-hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

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

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

        .breadcrumb i {
            margin: 0 6px;
            font-size: 0.7rem;
        }

        .page-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }

        .page-hero .lead {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .btn-primary {
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 700;
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-gold);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(197,160,89,0.4);
        }

        .btn-outline {
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline:hover {
            border-color: var(--accent-gold);
            color: var(--accent-amber);
            background: rgba(197,160,89,0.05);
        }

        .hero-stats {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }

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

        .hero-stat .stat-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-amber);
            line-height: 1.2;
        }

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

        .hero-image {
            border-radius: var(--border-radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-gold);
            background: var(--bg-card);
            aspect-ratio: 4/3;
        }

        .hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .hero-image:hover img {
            transform: scale(1.03);
        }

        /* ============================================
           MAIN CONTENT SECTIONS
           ============================================ */
        main {
            padding-bottom: 60px;
        }

        .section {
            padding: 60px 0;
        }

        .section-alt {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-header {
            max-width: 700px;
            margin-bottom: 36px;
        }

        .section-header .section-tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-amber);
            background: rgba(197,160,89,0.10);
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
            letter-spacing: 0.05em;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .section-header p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .content-block {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .content-block p {
            margin-bottom: 1em;
        }

        .highlight-box {
            background: var(--bg-card);
            border-left: 4px solid var(--accent-gold);
            border-radius: var(--border-radius-sm);
            padding: 20px 24px;
            margin: 24px 0;
            color: var(--text-primary);
            font-weight: 500;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

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

        .step-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .step-item {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            padding: 20px;
            transition: all var(--transition-fast);
        }

        .step-item:hover {
            border-color: var(--border-gold);
            box-shadow: var(--shadow-sm);
        }

        .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            color: #1a1a1a;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-gold);
        }

        .step-content h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

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

        .outcome-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            padding: 24px;
            transition: all var(--transition-fast);
            height: 100%;
        }

        .outcome-card:hover {
            border-color: var(--border-gold);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .outcome-icon {
            font-size: 2rem;
            margin-bottom: 16px;
            color: var(--accent-amber);
        }

        .outcome-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .outcome-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .example-table {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            overflow: hidden;
            margin-top: 24px;
        }

        .example-table table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }

        .example-table th {
            background: var(--bg-elevated);
            color: var(--accent-amber);
            font-weight: 600;
            text-align: left;
            padding: 14px 16px;
            border-bottom: 1px solid var(--border-subtle);
        }

        .example-table td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-subtle);
            color: var(--text-secondary);
        }

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

        .example-table .highlight-row td {
            background: rgba(197,160,89,0.05);
        }

        .mistake-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .mistake-list li {
            display: flex;
            gap: 12px;
            padding: 16px 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-sm);
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .mistake-list li i {
            color: var(--danger);
            font-size: 1.1rem;
            margin-top: 2px;
        }

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-sm);
            overflow: hidden;
        }

        .faq-question {
            width: 100%;
            padding: 16px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

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

        .faq-question i {
            transition: transform var(--transition-fast);
            color: var(--accent-gold);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
            padding: 0 20px;
        }

        .faq-answer-inner {
            padding-bottom: 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-secondary), #1e1e22);
            border-radius: var(--border-radius-lg);
            padding: 48px;
            text-align: center;
            border: 1px solid var(--border-gold);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(197,160,89,0.06), transparent 70%);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* ============================================
           FOOTER
           ============================================ */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 50px 0 20px;
            margin-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand p {
            margin-top: 16px;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .footer-disclaimer {
            max-width: 500px;
            text-align: right;
        }

        /* ============================================
           RESPONSIVE
           ============================================ */
        @media (max-width: 1024px) {
            .page-hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 62px;
            }

            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(18, 18, 18, 0.98);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
                border-bottom: 1px solid var(--border-subtle);
                transform: translateY(-100%);
                transition: transform var(--transition-base);
                z-index: 999;
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .main-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-actions {
                display: none;
            }

            .nav-actions.mobile-visible {
                display: flex;
                flex-direction: column;
                gap: 10px;
                position: fixed;
                top: calc(var(--header-height) + 220px);
                left: 0;
                right: 0;
                padding: 20px;
                background: rgba(18, 18, 18, 0.98);
                border-bottom: 1px solid var(--border-subtle);
                z-index: 998;
            }

            .page-hero {
                padding: calc(var(--header-height) + 20px) 0 40px;
            }

            .page-hero h1 {
                font-size: 1.8rem;
            }

            .section {
                padding: 40px 0;
            }

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

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

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

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

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

            .footer-disclaimer {
                text-align: center;
            }

            .grid-3 {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

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

            .hero-stats {
                gap: 16px;
            }

            .example-table {
                font-size: 0.85rem;
            }

            .example-table th,
            .example-table td {
                padding: 10px 12px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #121212;
            --bg-secondary: #1C1C1E;
            --bg-card: #1A1A1E;
            --bg-elevated: #222226;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --accent-muted-gold: #D4AC0D;
            --accent-deep-gold: #8C7340;
            --text-primary: #F5F5F7;
            --text-secondary: #C7C7CE;
            --text-muted: #8E8E96;
            --border-subtle: #2C2C32;
            --border-gold: rgba(197, 160, 89, 0.35);
            --success: #2ECC71;
            --danger: #E74C3C;
            --info: #5DADE2;
            --border-radius-sm: 8px;
            --border-radius-md: 14px;
            --border-radius-lg: 20px;
            --border-radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
            --shadow-gold: 0 4px 20px rgba(197,160,89,0.25);
            --font-sans: 'Be Vietnam Pro', 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-serif: 'Playfair Display', 'Times New Roman', Georgia, serif;
            --max-width: 1140px;
            --header-height: 72px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --radius-pill: 999px;
        }
        @media (max-width: 767px) {
            :root {
                --header-height: 62px;
            }
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            min-height: 100vh;
            overflow-x: hidden;
            padding-top: var(--header-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-amber);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ============================================
           HEADER / NAVIGATION
           ============================================ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(18, 18, 18, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            height: var(--header-height);
            transition: box-shadow var(--transition-base), background var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0,0,0,0.5);
            background: rgba(18, 18, 18, 0.97);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 16px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            min-width: 0;
        }
        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #1a1a1a;
            font-weight: 800;
            flex-shrink: 0;
            box-shadow: var(--shadow-gold);
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            min-width: 0;
        }
        .brand-name {
            font-size: 0.88rem;
            font-weight: 800;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            letter-spacing: -0.01em;
        }
        .brand-sub {
            font-size: 0.68rem;
            color: var(--accent-muted-gold);
            white-space: nowrap;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2px;
            flex-shrink: 0;
        }
        .main-nav a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .main-nav a:hover {
            color: var(--text-primary);
            background: rgba(255,255,255,0.06);
        }
        .main-nav a.active {
            color: var(--accent-gold);
            background: rgba(197, 160, 89, 0.12);
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .btn-login {
            padding: 8px 16px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: 8px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-login:hover {
            color: var(--accent-gold);
            background: rgba(255,255,255,0.05);
        }
        .btn-signup {
            padding: 9px 20px;
            font-size: 0.85rem;
            font-weight: 600;
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border-radius: 8px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: var(--shadow-gold);
        }
        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(197,160,89,0.35);
            color: #1a1a1a;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--bg-elevated);
            border: 1px solid var(--border-subtle);
            flex-shrink: 0;
            padding: 0 8px;
        }
        .nav-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============================================
           BREADCRUMB
           ============================================ */
        .breadcrumb-wrap {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-subtle);
            padding: 12px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--accent-gold);
        }
        .breadcrumb .separator {
            color: var(--accent-deep-gold);
        }
        .breadcrumb .current {
            color: var(--accent-gold);
            font-weight: 500;
        }

        /* ============================================
           HERO – SHORT BANNER
           ============================================ */
        .hero-short {
            background: linear-gradient(135deg, var(--bg-secondary) 0%, #1a1a1f 40%, var(--bg-card) 100%);
            border-bottom: 1px solid var(--border-subtle);
            padding: 40px 0 32px;
            position: relative;
            overflow: hidden;
        }
        .hero-short::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(197,160,89,0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-short-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .hero-short-content {
            flex: 1 1 400px;
            max-width: 680px;
        }
        .hero-tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-amber);
            background: rgba(197,160,89,0.12);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
        }
        .hero-short h1 {
            font-size: clamp(1.4rem, 3.5vw, 2.1rem);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            margin-bottom: 8px;
        }
        .hero-short p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 600px;
        }
        .hero-short-badge {
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            padding: 16px 24px;
            background: var(--bg-elevated);
            border: 1px solid var(--border-gold);
            border-radius: var(--border-radius-md);
            box-shadow: var(--shadow-gold);
        }
        .hero-short-badge .badge-number {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent-amber);
            line-height: 1;
        }
        .hero-short-badge .badge-label {
            font-size: 0.7rem;
            color: var(--text-muted);
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        /* ============================================
           MAIN CONTENT SECTIONS
           ============================================ */
        .page-section {
            padding: 48px 0;
        }
        .page-section.alt {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .section-heading {
            margin-bottom: 28px;
        }
        .section-heading .section-label {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-muted-gold);
            margin-bottom: 6px;
        }
        .section-heading h2 {
            font-size: clamp(1.3rem, 3vw, 1.7rem);
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            line-height: 1.3;
            margin-bottom: 8px;
        }
        .section-heading p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            max-width: 680px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .content-grid.three-col {
            grid-template-columns: repeat(3, 1fr);
        }
        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            padding: 24px;
            transition: all var(--transition-fast);
        }
        .content-card:hover {
            border-color: var(--border-gold);
            box-shadow: var(--shadow-md);
        }
        .content-card .card-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(197,160,89,0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--accent-gold);
            margin-bottom: 14px;
            flex-shrink: 0;
        }
        .content-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .content-card p,
        .content-card li {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .content-card ul {
            margin-top: 8px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .content-card ul li {
            padding-left: 16px;
            position: relative;
        }
        .content-card ul li::before {
            content: '•';
            position: absolute;
            left: 0;
            color: var(--accent-gold);
            font-weight: 700;
        }

        .highlight-box {
            background: var(--bg-elevated);
            border-left: 3px solid var(--accent-gold);
            border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
            padding: 16px 20px;
            margin: 16px 0;
        }
        .highlight-box p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            font-style: italic;
        }
        .highlight-box strong {
            color: var(--accent-gold);
            font-style: normal;
        }

        .step-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .step-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            padding: 18px 20px;
            transition: all var(--transition-fast);
        }
        .step-item:hover {
            border-color: var(--border-gold);
        }
        .step-number {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.9rem;
            color: #1a1a1a;
            flex-shrink: 0;
        }
        .step-content h3 {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .step-content p {
            font-size: 0.86rem;
            color: var(--text-secondary);
        }

        .table-wrap {
            overflow-x: auto;
            margin: 16px 0;
            border-radius: var(--border-radius-sm);
            border: 1px solid var(--border-subtle);
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.85rem;
            min-width: 560px;
        }
        .data-table thead th {
            background: var(--bg-elevated);
            color: var(--accent-gold);
            font-weight: 700;
            text-align: left;
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-subtle);
            white-space: nowrap;
        }
        .data-table tbody td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--border-subtle);
            color: var(--text-secondary);
            vertical-align: top;
        }
        .data-table tbody tr:last-child td {
            border-bottom: none;
        }
        .data-table tbody tr:hover td {
            background: rgba(255,255,255,0.03);
        }
        .data-table td strong {
            color: var(--text-primary);
        }
        .badge-win {
            display: inline-block;
            padding: 2px 10px;
            font-size: 0.72rem;
            font-weight: 600;
            border-radius: var(--radius-pill);
            background: rgba(46,204,113,0.15);
            color: var(--success);
        }
        .badge-lose {
            display: inline-block;
            padding: 2px 10px;
            font-size: 0.72rem;
            font-weight: 600;
            border-radius: var(--radius-pill);
            background: rgba(231,76,60,0.15);
            color: var(--danger);
        }
        .badge-refund {
            display: inline-block;
            padding: 2px 10px;
            font-size: 0.72rem;
            font-weight: 600;
            border-radius: var(--radius-pill);
            background: rgba(93,173,226,0.15);
            color: var(--info);
        }
        .badge-gold {
            display: inline-block;
            padding: 2px 10px;
            font-size: 0.72rem;
            font-weight: 600;
            border-radius: var(--radius-pill);
            background: rgba(197,160,89,0.15);
            color: var(--accent-muted-gold);
        }

        .image-block {
            border-radius: var(--border-radius-md);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-md);
        }
        .image-block img {
            width: 100%;
            height: 240px;
            object-fit: cover;
        }
        .image-block .image-caption {
            padding: 10px 16px;
            font-size: 0.78rem;
            color: var(--text-muted);
            background: var(--bg-card);
            border-top: 1px solid var(--border-subtle);
        }

        /* ============================================
           FAQ SECTION
           ============================================ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            overflow: hidden;
            background: var(--bg-card);
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-gold);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 20px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            text-align: left;
            width: 100%;
            transition: all var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-gold);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(197,160,89,0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            color: var(--accent-gold);
            transition: transform var(--transition-fast);
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 20px;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 20px 16px;
        }
        .faq-answer p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ============================================
           CTA SECTION
           ============================================ */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-secondary), var(--bg-elevated));
            border: 1px solid var(--border-gold);
            border-radius: var(--border-radius-lg);
            padding: 36px 32px;
            text-align: center;
            box-shadow: var(--shadow-gold);
        }
        .cta-section h2 {
            font-size: clamp(1.3rem, 3vw, 1.6rem);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .cta-section p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 20px;
        }
        .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.9rem;
            font-weight: 700;
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-gold);
            white-space: nowrap;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(197,160,89,0.4);
            color: #1a1a1a;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent-gold);
            background: transparent;
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background: rgba(197,160,89,0.1);
            border-color: var(--accent-gold);
            color: var(--accent-amber);
        }

        /* ============================================
           FOOTER
           ============================================ */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 40px 0 20px;
            margin-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }
        .footer-brand .brand {
            margin-bottom: 12px;
        }
        .footer-brand .brand-name {
            font-size: 1rem;
        }
        .footer-brand p {
            font-size: 0.82rem;
            color: var(--text-muted);
            max-width: 320px;
            line-height: 1.6;
        }
        .footer-col h4 {
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--accent-gold);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-gold);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .footer-disclaimer {
            max-width: 500px;
            text-align: right;
            line-height: 1.5;
        }

        /* ============================================
           FAB – LEFT FLOATING
           ============================================ */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-pill);
            background: rgba(18,18,18,0.65);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 2px solid transparent;
            background-clip: padding-box;
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            box-shadow: 0 0 15px rgba(0,240,255,0.35);
            transition: all var(--transition-fast);
            cursor: pointer;
            opacity: 0.65;
            animation: fab-breathe 3s ease-in-out infinite;
        }
        .fab-left::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: var(--radius-pill);
            background: linear-gradient(135deg, #CCFF00, #00F0FF);
            z-index: -1;
            opacity: 0.7;
            transition: opacity var(--transition-fast);
        }
        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0,240,255,0.6);
        }
        .fab-left:hover::before {
            opacity: 1;
        }
        .fab-left:active {
            transform: scale(0.95);
        }
        .fab-left i {
            font-size: 1.3rem;
            color: #00F0FF;
            text-shadow: 0 0 10px rgba(0,240,255,0.8);
        }
        .fab-left .fab-dot {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #FF007F;
            animation: fab-pulse-dot 1.5s ease-in-out infinite;
        }
        @keyframes fab-breathe {
            0%, 100% { opacity: 0.6; box-shadow: 0 0 10px rgba(0,240,255,0.25); }
            50% { opacity: 0.85; box-shadow: 0 0 20px rgba(0,240,255,0.5); }
        }
        @keyframes fab-pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.4); }
        }

        /* ============================================
           RESPONSIVE
           ============================================ */
        @media (max-width: 1024px) {
            .main-nav a {
                padding: 8px 10px;
                font-size: 0.8rem;
            }
            .content-grid.three-col {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                background: var(--bg-secondary);
                border-bottom: 1px solid var(--border-subtle);
                padding: 8px 16px;
                box-shadow: var(--shadow-lg);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 8px;
                font-size: 0.9rem;
                border-radius: 6px;
                text-align: left;
            }
            .nav-actions {
                gap: 4px;
            }
            .btn-login {
                padding: 6px 12px;
                font-size: 0.78rem;
            }
            .btn-signup {
                padding: 6px 14px;
                font-size: 0.78rem;
            }
            .hero-short {
                padding: 28px 0 24px;
            }
            .hero-short-badge {
                padding: 10px 16px;
            }
            .content-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .content-grid.three-col {
                grid-template-columns: 1fr;
            }
            .page-section {
                padding: 32px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-disclaimer {
                text-align: center;
                max-width: 100%;
            }
            .cta-section {
                padding: 24px 18px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 10px 20px;
                font-size: 0.82rem;
                width: 100%;
                justify-content: center;
            }
            .cta-buttons {
                flex-direction: column;
            }
            .fab-left {
                left: 12px;
                bottom: 80px;
                width: 48px;
                height: 48px;
            }
            .fab-left i {
                font-size: 1.1rem;
            }
        }
        @media (max-width: 520px) {
            .brand-name {
                font-size: 0.78rem;
            }
            .brand-sub {
                font-size: 0.62rem;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
            .nav-actions {
                gap: 2px;
            }
            .btn-login {
                padding: 5px 8px;
                font-size: 0.7rem;
            }
            .btn-signup {
                padding: 5px 10px;
                font-size: 0.7rem;
            }
            .hero-short h1 {
                font-size: 1.3rem;
            }
            .hero-short p {
                font-size: 0.85rem;
            }
            .section-heading h2 {
                font-size: 1.2rem;
            }
            .step-item {
                flex-direction: column;
                gap: 8px;
            }
        }

/* roulang page: category3 */
/* ============================================
           DESIGN SYSTEM - Royal Dark VIP Lounge
           ============================================ */
        :root {
            --bg-primary: #121212;
            --bg-secondary: #1C1C1E;
            --bg-card: #1A1A1E;
            --bg-elevated: #222226;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --accent-muted-gold: #D4AC0D;
            --accent-deep-gold: #8C7340;
            --text-primary: #F5F5F7;
            --text-secondary: #C7C7CE;
            --text-muted: #8E8E96;
            --border-subtle: #2C2C32;
            --border-gold: rgba(197, 160, 89, 0.35);
            --success: #2ECC71;
            --danger: #E74C3C;
            --info: #5DADE2;
            --border-radius-sm: 8px;
            --border-radius-md: 14px;
            --border-radius-lg: 20px;
            --border-radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
            --shadow-gold: 0 4px 20px rgba(197,160,89,0.25);
            --font-sans: 'Be Vietnam Pro', 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-serif: 'Playfair Display', 'Times New Roman', Georgia, serif;
            --max-width: 1140px;
            --header-height: 72px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --radius-pill: 999px;
        }

        /* ============ RESET & BASE ============ */
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            min-height: 100vh;
            overflow-x: hidden;
            padding-top: var(--header-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-amber);
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ============ HEADER / NAVIGATION ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(18, 18, 18, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            height: var(--header-height);
            transition: box-shadow var(--transition-base), background var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0,0,0,0.5);
            background: rgba(18, 18, 18, 0.97);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 20px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            min-width: 0;
        }
        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #1a1a1a;
            font-weight: 800;
            flex-shrink: 0;
            box-shadow: var(--shadow-gold);
            transition: transform var(--transition-fast);
        }
        .brand:hover .brand-icon {
            transform: scale(1.05);
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            min-width: 0;
        }
        .brand-name {
            font-size: 0.9rem;
            font-weight: 800;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            letter-spacing: -0.01em;
        }
        .brand-sub {
            font-size: 0.68rem;
            color: var(--accent-muted-gold);
            white-space: nowrap;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            font-weight: 500;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }
        .main-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--text-primary);
            background: rgba(255,255,255,0.06);
        }
        .main-nav a.active {
            color: var(--accent-amber);
            background: rgba(197, 160, 89, 0.12);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 2px;
            background: var(--accent-amber);
            border-radius: 4px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .btn-login {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .btn-login:hover {
            color: var(--text-primary);
            background: rgba(255,255,255,0.06);
            border-color: var(--border-subtle);
        }
        .btn-signup {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 20px;
            font-size: 0.85rem;
            font-weight: 700;
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: var(--shadow-gold);
            border: 1px solid transparent;
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(197,160,89,0.35);
            color: #1a1a1a;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: transparent;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-secondary);
            border-radius: 4px;
            transition: all var(--transition-base);
        }
        .nav-toggle:hover {
            border-color: var(--border-gold);
        }
        .nav-toggle:hover span {
            background: var(--accent-amber);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============ MOBILE NAV OVERLAY ============ */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 999;
            background: rgba(18,18,18,0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 24px 20px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }
        .mobile-nav-overlay.open {
            display: flex;
        }
        .mobile-nav-overlay a {
            display: block;
            padding: 14px 18px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: var(--border-radius-md);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }
        .mobile-nav-overlay a:hover {
            background: rgba(255,255,255,0.06);
            color: var(--text-primary);
            border-color: var(--border-subtle);
        }
        .mobile-nav-overlay a.active {
            color: var(--accent-amber);
            background: rgba(197,160,89,0.12);
            border-color: var(--border-gold);
        }
        .mobile-nav-actions {
            display: flex;
            gap: 10px;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
        }
        .mobile-nav-actions a {
            flex: 1;
            text-align: center;
            padding: 12px 16px;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
        }
        .mobile-nav-actions .btn-login-m {
            color: var(--text-primary);
            border: 1px solid var(--border-subtle);
            background: transparent;
        }
        .mobile-nav-actions .btn-signup-m {
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            box-shadow: var(--shadow-gold);
        }

        /* ============ HERO ============ */
        .hero {
            padding: 56px 0 48px;
            background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
            border-bottom: 1px solid var(--border-subtle);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(197,160,89,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(255,191,0,0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-muted-gold);
            background: rgba(197,160,89,0.1);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-pill);
            margin-bottom: 18px;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }
        .hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
            max-width: 720px;
            color: var(--text-primary);
            line-height: 1.25;
        }
        .hero h1 .highlight {
            color: var(--accent-amber);
            font-style: italic;
        }
        .hero-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .hero-icon-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 28px;
        }
        .hero-icon-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .hero-icon-item i {
            color: var(--accent-gold);
            font-size: 0.9rem;
        }
        .hero-icon-item:hover {
            border-color: var(--border-gold);
            color: var(--text-primary);
            transform: translateY(-2px);
        }
        .hero-status-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            padding: 16px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-lg);
            max-width: 680px;
            margin-bottom: 10px;
        }
        .status-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            flex-shrink: 0;
        }
        .status-dot.green {
            background: var(--success);
            box-shadow: 0 0 8px rgba(46,204,113,0.5);
        }
        .status-dot.gold {
            background: var(--accent-amber);
            box-shadow: 0 0 8px rgba(255,191,0,0.5);
        }
        .status-dot.blue {
            background: var(--info);
            box-shadow: 0 0 8px rgba(93,173,226,0.5);
        }
        .status-text {
            font-size: 0.82rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .status-text strong {
            color: var(--text-primary);
            font-weight: 700;
        }

        /* ============ SECTION GENERAL ============ */
        .section {
            padding: 56px 0;
        }
        .section-alt {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-muted-gold);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-title {
            font-size: 1.7rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
            color: var(--text-primary);
            line-height: 1.3;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .section-title.left,
        .section-desc.left {
            max-width: 100%;
        }

        /* ============ EXPERIENCE CARDS ============ */
        .exp-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-lg);
            padding: 28px 24px;
            height: 100%;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .exp-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-gold), var(--accent-amber));
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .exp-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-gold);
            box-shadow: var(--shadow-md);
        }
        .exp-card:hover::before {
            opacity: 1;
        }
        .exp-card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--border-radius-md);
            background: rgba(197,160,89,0.12);
            border: 1px solid var(--border-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-gold);
            margin-bottom: 16px;
            transition: all var(--transition-fast);
        }
        .exp-card:hover .exp-card-icon {
            background: rgba(197,160,89,0.2);
            transform: scale(1.05);
        }
        .exp-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .exp-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.65;
        }
        .exp-card .exp-number {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 2.4rem;
            font-weight: 800;
            color: rgba(197,160,89,0.1);
            font-family: var(--font-serif);
            line-height: 1;
        }

        /* ============ MISTAKES LIST ============ */
        .mistake-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .mistake-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 18px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md);
            margin-bottom: 12px;
            transition: all var(--transition-fast);
        }
        .mistake-list li:hover {
            border-color: rgba(231,76,60,0.4);
            background: var(--bg-elevated);
        }
        .mistake-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(231,76,60,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--danger);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .mistake-content h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .mistake-content p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ============ STRATEGY TABLE / COMPARISON ============ */
        .strategy-compare {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-xl);
            overflow: hidden;
            margin-bottom: 20px;
        }
        .strategy-header {
            display: grid;
            grid-template-columns: 1fr 1fr;
            background: var(--bg-elevated);
            border-bottom: 1px solid var(--border-subtle);
        }
        .strategy-header-item {
            padding: 16px 24px;
            text-align: center;
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
        }
        .strategy-header-item.tai {
            color: var(--success);
            border-right: 1px solid var(--border-subtle);
        }
        .strategy-header-item.xiu {
            color: var(--info);
        }
        .strategy-body {
            display: grid;
            grid-template-columns: 1fr 1fr;
        }
        .strategy-col {
            padding: 20px 24px;
        }
        .strategy-col:first-child {
            border-right: 1px solid var(--border-subtle);
        }
        .strategy-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .strategy-col ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .strategy-col ul li i {
            font-size: 0.8rem;
            margin-top: 5px;
            flex-shrink: 0;
        }
        .strategy-col.tai-list ul li i {
            color: var(--success);
        }
        .strategy-col.xiu-list ul li i {
            color: var(--info);
        }
        .strategy-note {
            padding: 16px 24px;
            background: rgba(197,160,89,0.06);
            border-top: 1px solid var(--border-subtle);
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.6;
        }
        .strategy-note i {
            color: var(--accent-gold);
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ============ DATA BADGES / STATS ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
        }
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-lg);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .stat-card:hover {
            border-color: var(--border-gold);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-amber);
            font-family: var(--font-serif);
            line-height: 1.2;
            margin-bottom: 4px;
            letter-spacing: -0.02em;
        }
        .stat-number span {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent-muted-gold);
            margin-left: 2px;
        }
        .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            font-weight: 500;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        /* ============ SCENARIO BLOCK ============ */
        .scenario-block {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-xl);
            padding: 32px 28px;
            margin-bottom: 16px;
            transition: all var(--transition-base);
            position: relative;
        }
        .scenario-block:hover {
            border-color: var(--border-gold);
            box-shadow: var(--shadow-md);
        }
        .scenario-block .scenario-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }
        .scenario-tag.tai-tag {
            background: rgba(46,204,113,0.15);
            color: var(--success);
            border: 1px solid rgba(46,204,113,0.3);
        }
        .scenario-tag.xiu-tag {
            background: rgba(93,173,226,0.15);
            color: var(--info);
            border: 1px solid rgba(93,173,226,0.3);
        }
        .scenario-block h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .scenario-block p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.65;
        }

        /* ============ COVER IMAGE BANNER ============ */
        .cover-banner {
            position: relative;
            border-radius: var(--border-radius-xl);
            overflow: hidden;
            margin: 32px 0;
            border: 1px solid var(--border-subtle);
            min-height: 320px;
            display: flex;
            align-items: flex-end;
        }
        .cover-banner img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .cover-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(18,18,18,0.15) 30%, rgba(18,18,18,0.85) 100%);
        }
        .cover-banner-content {
            position: relative;
            z-index: 2;
            padding: 24px 28px;
            max-width: 600px;
        }
        .cover-banner-content .badge-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            font-size: 0.75rem;
            font-weight: 700;
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border-radius: var(--radius-pill);
            margin-bottom: 10px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }
        .cover-banner-content h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .cover-banner-content p {
            font-size: 0.92rem;
            color: rgba(245,245,247,0.85);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ============ FAQ ============ */
        .faq-accordion .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--border-radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-accordion .accordion-item:hover {
            border-color: var(--border-gold);
        }
        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 18px 20px;
            border: none;
            box-shadow: none;
            transition: all var(--transition-fast);
            position: relative;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(197,160,89,0.08);
            color: var(--accent-amber);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            outline: 2px solid var(--accent-gold);
            outline-offset: -2px;
            border-radius: var(--border-radius-md);
        }
        .faq-accordion .accordion-button::after {
            filter: invert(0.7) sepia(0.6) saturate(2) hue-rotate(5deg);
            background-size: 1rem;
        }
        .faq-accordion .accordion-body {
            padding: 16px 20px 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            border-top: 1px solid var(--border-subtle);
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            filter: invert(0.7) sepia(0.6) saturate(2) hue-rotate(5deg);
        }

        /* ============ CTA ============ */
        .cta-section {
            padding: 56px 0;
            background: linear-gradient(135deg, var(--bg-secondary) 0%, #1a1612 100%);
            border-top: 1px solid var(--border-subtle);
            text-align: center;
        }
        .cta-box {
            max-width: 640px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .cta-box .cta-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #1a1a1a;
            margin: 0 auto 18px;
            box-shadow: var(--shadow-gold);
        }
        .cta-box h2 {
            font-size: 1.7rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .cta-box p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            font-size: 0.95rem;
            font-weight: 700;
            color: #1a1a1a;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-gold);
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn-cta-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(197,160,89,0.4);
            color: #1a1a1a;
        }
        .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-cta-secondary:hover {
            border-color: var(--border-gold);
            background: rgba(255,255,255,0.05);
            color: var(--accent-amber);
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: #0D0D0F;
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand .brand {
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
        }
        .footer-col ul li a:hover {
            color: var(--accent-amber);
            transform: translateX(3px);
        }
        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-copyright {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-disclaimer {
            font-size: 0.75rem;
            color: #5a5a62;
            line-height: 1.5;
            max-width: 800px;
        }

        /* ============ FAB ============ */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-pill);
            background: rgba(18,18,18,0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-base);
            text-decoration: none;
            box-shadow: 0 0 20px rgba(0,240,255,0.25);
            position: fixed;
        }
        .fab-support::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: var(--radius-pill);
            background: linear-gradient(135deg, #CCFF00, #0052FF);
            z-index: -1;
            opacity: 0.7;
            transition: opacity var(--transition-fast);
        }
        .fab-support:hover::before {
            opacity: 1;
        }
        .fab-support i {
            font-size: 1.3rem;
            color: var(--text-primary);
            transition: all var(--transition-fast);
        }
        .fab-support:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0,240,255,0.5);
        }
        .fab-support:hover i {
            color: #00F0FF;
            animation: neon-flicker 0.3s ease;
        }
        .fab-support .fab-notify {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #FF007F;
            border: 2px solid #121212;
            animation: neon-blink 1.5s ease-in-out infinite;
        }
        @keyframes neon-flicker {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        @keyframes neon-blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .main-nav {
                gap: 0;
            }
            .main-nav a {
                padding: 8px 10px;
                font-size: 0.82rem;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 62px;
            }
            .main-nav {
                display: none;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .hero {
                padding: 40px 0 36px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-sub {
                font-size: 0.95rem;
            }
            .hero-icon-grid {
                gap: 8px;
            }
            .hero-icon-item {
                padding: 6px 12px;
                font-size: 0.75rem;
            }
            .hero-status-bar {
                gap: 10px;
                padding: 12px 16px;
                flex-direction: column;
            }
            .section {
                padding: 40px 0;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .stat-card {
                padding: 18px 14px;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .strategy-header,
            .strategy-body {
                grid-template-columns: 1fr;
            }
            .strategy-header-item.tai {
                border-right: none;
                border-bottom: 1px solid var(--border-subtle);
            }
            .strategy-col:first-child {
                border-right: none;
                border-bottom: 1px solid var(--border-subtle);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cover-banner {
                min-height: 260px;
            }
            .cover-banner-content h3 {
                font-size: 1.2rem;
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .btn-cta-primary,
            .btn-cta-secondary {
                padding: 12px 20px;
                font-size: 0.85rem;
            }
            .exp-card {
                padding: 22px 18px;
            }
            .exp-card .exp-number {
                font-size: 1.8rem;
                top: 16px;
                right: 16px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .hero h1 {
                font-size: 1.4rem;
            }
            .hero-icon-item {
                font-size: 0.7rem;
                padding: 5px 10px;
            }
            .hero-badge {
                font-size: 0.7rem;
                padding: 5px 12px;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-card {
                padding: 14px 10px;
            }
            .stat-number {
                font-size: 1.3rem;
            }
            .stat-label {
                font-size: 0.68rem;
            }
            .mistake-list li {
                padding: 14px 16px;
                gap: 10px;
            }
            .mistake-icon {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
            }
            .scenario-block {
                padding: 22px 18px;
            }
            .scenario-block h3 {
                font-size: 1rem;
            }
            .faq-accordion .accordion-button {
                font-size: 0.85rem;
                padding: 14px 16px;
            }
            .faq-accordion .accordion-body {
                font-size: 0.82rem;
                padding: 12px 16px 16px;
            }
            .brand-name {
                font-size: 0.8rem;
            }
            .brand-sub {
                font-size: 0.6rem;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
            .cover-banner {
                min-height: 220px;
            }
            .cover-banner-content {
                padding: 18px 20px;
            }
            .cover-banner-content h3 {
                font-size: 1.05rem;
            }
            .cover-banner-content p {
                font-size: 0.82rem;
            }
            .fab-support {
                width: 46px;
                height: 46px;
                left: 12px;
                bottom: 80px;
            }
            .fab-support i {
                font-size: 1.1rem;
            }
        }