/* roulang page: index */
:root {
            --bg-primary: #0A2E1C;
            --bg-secondary: #123E25;
            --bg-deep: #062315;
            --gold: #FFD700;
            --gold-soft: #F0E68C;
            --gold-bronze: #C5A059;
            --red: #D32F2F;
            --text-white: #FFFFFF;
            --text-mint: #D1F2EB;
            --text-muted: #8FB8A8;
            --border-gold: rgba(255, 215, 0, 0.35);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
            --shadow-lg-gold: 0 12px 40px rgba(255, 215, 0, 0.2);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-sans: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            --spacing-section: 5rem;
            --max-width: 1240px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            color: var(--gold);
            text-decoration: none;
            transition: color .25s ease;
        }

        a:hover {
            color: var(--gold-soft);
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding-top: var(--spacing-section);
            padding-bottom: var(--spacing-section);
            position: relative;
        }

        .section-header {
            margin-bottom: 2.8rem;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 215, 0, 0.12);
            color: var(--gold);
            border: 1px solid var(--border-gold);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: .82rem;
            font-weight: 600;
            letter-spacing: .04em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 2.1rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-white);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-mint);
            max-width: 720px;
            line-height: 1.65;
        }

        .gold-text {
            color: var(--gold);
        }

        .mint-text {
            color: var(--text-mint);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.2);
            padding: 12px 0;
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            gap: 16px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 900;
            font-size: 1.15rem;
            color: var(--gold);
            letter-spacing: -.01em;
            line-height: 1.2;
            white-space: nowrap;
        }

        .brand-logo i {
            font-size: 1.8rem;
            color: var(--gold);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 26px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-link-item {
            color: var(--text-mint);
            font-weight: 600;
            font-size: .95rem;
            padding: 8px 12px;
            border-radius: 20px;
            transition: all .25s ease;
            white-space: nowrap;
        }

        .nav-link-item:hover,
        .nav-link-item.active {
            color: var(--gold);
            background: rgba(255, 215, 0, 0.1);
        }

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

        .btn-login {
            color: var(--text-white);
            font-weight: 600;
            font-size: .9rem;
            padding: 8px 16px;
            border: none;
            background: transparent;
            transition: color .2s;
        }

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

        .btn-signup {
            background: var(--gold);
            color: var(--bg-deep);
            font-weight: 700;
            font-size: .9rem;
            padding: 10px 22px;
            border-radius: 30px;
            border: none;
            transition: all .3s ease;
            box-shadow: 0 4px 14px rgba(255, 215, 0, 0.35);
        }

        .btn-signup:hover {
            background: #FFE44D;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.45);
        }

        .navbar-toggler {
            display: none;
            background: transparent;
            border: 1px solid var(--border-gold);
            color: var(--gold);
            font-size: 1.5rem;
            padding: 6px 12px;
            border-radius: 8px;
        }

        .mobile-collapse {
            display: none;
        }

        /* Hero */
        .hero-section {
            padding: 4.5rem 0 4rem;
            background: linear-gradient(160deg, var(--bg-primary) 0%, var(--bg-secondary) 55%, #0B3C25 100%);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 450px;
            height: 450px;
            background: radial-gradient(circle, rgba(50, 205, 50, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 3.5rem;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-content {
            text-align: left;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 215, 0, 0.15);
            border: 1px solid var(--border-gold);
            color: var(--gold);
            padding: 8px 18px;
            border-radius: 30px;
            font-weight: 600;
            font-size: .88rem;
            margin-bottom: 1.4rem;
        }

        .hero-badge i {
            font-size: 1rem;
        }

        .hero-title {
            font-size: 3.1rem;
            font-weight: 900;
            line-height: 1.18;
            letter-spacing: -.02em;
            margin-bottom: 1.4rem;
            color: var(--text-white);
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-mint);
            line-height: 1.7;
            max-width: 620px;
            margin-bottom: 2.2rem;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 2.4rem;
        }

        .btn-gold {
            background: var(--gold);
            color: var(--bg-deep);
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 30px;
            border-radius: 30px;
            border: none;
            transition: all .3s ease;
            box-shadow: 0 6px 20px rgba(255, 215, 0, 0.35);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-gold:hover {
            background: #FFE44D;
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(255, 215, 0, 0.5);
            color: var(--bg-deep);
        }

        .btn-outline-gold {
            background: transparent;
            color: var(--gold);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: 30px;
            border: 2px solid var(--gold);
            transition: all .3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-outline-gold:hover {
            background: rgba(255, 215, 0, 0.1);
            transform: translateY(-3px);
            color: var(--gold-soft);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat-number {
            font-size: 1.9rem;
            font-weight: 900;
            color: var(--gold);
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: .9rem;
            color: var(--text-muted);
        }

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

        .hero-image-wrapper {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 2px solid var(--border-gold);
            box-shadow: var(--shadow-lg-gold);
            width: 100%;
            max-width: 480px;
            aspect-ratio: 4/3;
        }

        .hero-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        .hero-glow-chip {
            position: absolute;
            bottom: 18px;
            left: 18px;
            background: rgba(10, 46, 28, 0.85);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-gold);
            padding: 12px 18px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--gold);
            font-weight: 600;
            font-size: .9rem;
        }

        /* Benefits */
        .benefits-section {
            background: var(--bg-deep);
        }

        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
            margin-top: 2rem;
        }

        .benefit-card {
            background: var(--bg-secondary);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: var(--radius-md);
            padding: 1.8rem 1.6rem;
            transition: all .3s ease;
            text-align: left;
        }

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

        .benefit-icon {
            font-size: 2.2rem;
            color: var(--gold);
            margin-bottom: 1rem;
        }

        .benefit-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: .8rem;
            color: var(--text-white);
        }

        .benefit-card p {
            color: var(--text-mint);
            font-size: .95rem;
            line-height: 1.6;
            margin: 0;
        }

        /* Eligibility */
        .eligibility-section {
            background: var(--bg-primary);
        }

        .eligibility-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
        }

        .eligibility-content h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 1.2rem;
        }

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

        .eligibility-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 215, 0, 0.12);
            color: var(--text-mint);
            font-size: 1rem;
        }

        .eligibility-list li i {
            color: var(--gold);
            font-size: 1.2rem;
            margin-top: 4px;
        }

        .eligibility-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-gold);
            box-shadow: var(--shadow-lg-gold);
        }

        .eligibility-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        /* Content / CMS */
        .content-section {
            background: var(--bg-deep);
        }

        .content-layout {
            display: grid;
            grid-template-columns: 1.5fr .7fr;
            gap: 2.5rem;
            margin-top: 2rem;
        }

        .content-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .content-item {
            background: var(--bg-secondary);
            border: 1px solid rgba(255, 215, 0, 0.15);
            border-radius: var(--radius-md);
            padding: 1.3rem 1.5rem;
            transition: all .3s ease;
            display: flex;
            align-items: center;
            gap: 1.2rem;
        }

        .content-item:hover {
            border-color: var(--gold);
            box-shadow: var(--shadow-gold);
            transform: translateX(6px);
        }

        .content-item-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: rgba(255, 215, 0, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .content-item-body {
            flex: 1;
        }

        .content-item-title {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-white);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .content-item-meta {
            font-size: .85rem;
            color: var(--text-muted);
            display: flex;
            gap: 14px;
        }

        .content-item-arrow {
            color: var(--gold);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .content-sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .sidebar-card {
            background: var(--bg-secondary);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: var(--radius-md);
            padding: 1.6rem;
            text-align: left;
        }

        .sidebar-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--gold);
            margin-bottom: 1rem;
        }

        .sidebar-card p {
            color: var(--text-mint);
            font-size: .92rem;
            line-height: 1.6;
            margin: 0;
        }

        .sidebar-cta {
            margin-top: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--gold);
            font-weight: 600;
            font-size: .9rem;
        }

        /* Use Guide */
        .guide-section {
            background: var(--bg-primary);
        }

        .guide-columns {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2.5rem;
            margin-top: 2rem;
        }

        .guide-col {
            text-align: left;
        }

        .guide-col h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .guide-col h3 i {
            color: var(--gold);
        }

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

        .guide-list li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 215, 0, 0.12);
            color: var(--text-mint);
            font-size: .98rem;
            display: flex;
            gap: 12px;
        }

        .guide-list li span {
            color: var(--gold);
            font-weight: 700;
            min-width: 28px;
        }

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

        .review-summary {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            margin-bottom: 2.2rem;
            padding: 1.5rem 1.8rem;
            background: var(--bg-secondary);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-md);
        }

        .review-score {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--gold);
            line-height: 1;
        }

        .review-stars {
            color: var(--gold);
            font-size: 1.3rem;
        }

        .review-summary-text {
            color: var(--text-mint);
            font-size: .95rem;
        }

        .review-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .review-card {
            background: var(--bg-secondary);
            border: 1px solid rgba(255, 215, 0, 0.15);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            text-align: left;
        }

        .review-card .review-stars {
            font-size: 1rem;
            margin-bottom: .8rem;
        }

        .review-card p {
            color: var(--text-mint);
            font-size: .93rem;
            line-height: 1.65;
            margin-bottom: 1rem;
        }

        .review-author {
            font-weight: 700;
            color: var(--gold);
            font-size: .9rem;
        }

        .review-author span {
            display: block;
            font-weight: 400;
            color: var(--text-muted);
            font-size: .8rem;
        }

        /* Form */
        .form-section {
            background: var(--bg-primary);
        }

        .form-wrapper {
            max-width: 720px;
            margin: 0 auto;
            background: var(--bg-secondary);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            box-shadow: var(--shadow-lg-gold);
        }

        .form-wrapper h3 {
            font-size: 1.7rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-white);
            text-align: left;
        }

        .form-wrapper p {
            color: var(--text-mint);
            margin-bottom: 2rem;
            text-align: left;
        }

        .form-control {
            background: var(--bg-primary);
            border: 1px solid rgba(255, 215, 0, 0.25);
            color: var(--text-white);
            border-radius: 10px;
            padding: 13px 16px;
            font-size: .95rem;
            transition: all .25s;
        }

        .form-control:focus {
            background: var(--bg-primary);
            border-color: var(--gold);
            box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.15);
            color: var(--text-white);
        }

        .form-label {
            color: var(--text-mint);
            font-weight: 600;
            font-size: .9rem;
            margin-bottom: 6px;
        }

        .form-check-input {
            background-color: var(--bg-primary);
            border-color: var(--border-gold);
        }

        .form-check-input:checked {
            background-color: var(--gold);
            border-color: var(--gold);
        }

        .form-check-label {
            color: var(--text-mint);
            font-size: .88rem;
        }

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

        .faq-list {
            max-width: 820px;
            margin: 2rem auto 0;
        }

        .accordion-item {
            background: var(--bg-secondary);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: var(--radius-md) !important;
            margin-bottom: 1rem;
            overflow: hidden;
        }

        .accordion-button {
            background: var(--bg-secondary);
            color: var(--text-white);
            font-weight: 700;
            font-size: 1rem;
            padding: 1.2rem 1.5rem;
            border-radius: var(--radius-md) !important;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(255, 215, 0, 0.1);
            color: var(--gold);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--border-gold);
        }

        .accordion-button::after {
            filter: brightness(0) invert(1) sepia(1) saturate(5) hue-rotate(5deg);
        }

        .accordion-body {
            background: var(--bg-secondary);
            color: var(--text-mint);
            font-size: .95rem;
            line-height: 1.7;
            padding: 1.2rem 1.5rem;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 215, 0, 0.2);
            padding: 3.5rem 0 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand {
            color: var(--gold);
            font-weight: 900;
            font-size: 1.25rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: .92rem;
            line-height: 1.65;
        }

        .footer-col h5 {
            color: var(--gold);
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 1.2rem;
        }

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

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

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: .9rem;
            transition: color .2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 215, 0, 0.12);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .footer-copyright {
            color: var(--text-muted);
            font-size: .85rem;
        }

        .footer-trust {
            display: flex;
            gap: 16px;
            color: var(--gold);
            font-size: 1.2rem;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.2rem;
            bottom: 6rem;
            z-index: 1060;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-deep);
            border: 3px solid var(--gold);
            color: var(--gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            transition: all .3s ease;
            opacity: .7;
            animation: fab-breathe 3s ease-in-out infinite;
            cursor: pointer;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 28px rgba(255, 215, 0, 0.45);
        }

        .fab-left:active {
            transform: scale(.95);
        }

        @keyframes fab-breathe {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 2.5rem;
            }
            .hero-title {
                font-size: 2.5rem;
            }
            .benefits-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .review-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .content-layout {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 3.5rem;
            }
            .navbar-toggler {
                display: block;
            }
            .nav-menu {
                display: none;
            }
            .mobile-collapse {
                display: block;
                background: var(--bg-deep);
                border-top: 1px solid var(--border-gold);
                padding: 1rem 0;
            }
            .mobile-collapse .nav-menu {
                display: flex;
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 0 24px;
            }
            .mobile-collapse .nav-link-item {
                display: block;
                width: 100%;
                padding: 10px 14px;
            }
            .nav-actions {
                gap: 6px;
            }
            .btn-login {
                padding: 6px 10px;
                font-size: .82rem;
            }
            .btn-signup {
                padding: 8px 14px;
                font-size: .82rem;
            }
            .hero-section {
                padding: 3rem 0 2.5rem;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.2rem;
            }
            .hero-stat-number {
                font-size: 1.5rem;
            }
            .benefits-grid,
            .review-list {
                grid-template-columns: 1fr;
            }
            .eligibility-grid {
                grid-template-columns: 1fr;
            }
            .guide-columns {
                grid-template-columns: 1fr;
            }
            .form-wrapper {
                padding: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .fab-left {
                width: 48px;
                height: 48px;
                left: .8rem;
                bottom: 5rem;
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .brand-logo {
                font-size: .95rem;
            }
            .brand-logo i {
                font-size: 1.4rem;
            }
            .nav-actions {
                gap: 4px;
            }
            .btn-login {
                font-size: .75rem;
                padding: 5px 8px;
            }
            .btn-signup {
                font-size: .75rem;
                padding: 7px 12px;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-badge {
                font-size: .78rem;
                padding: 6px 14px;
            }
            .btn-gold,
            .btn-outline-gold {
                font-size: .9rem;
                padding: 12px 20px;
            }
            .hero-stats {
                flex-direction: column;
                gap: .8rem;
            }
            .review-summary {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0B1A30;
            --bg-secondary: #0F0C20;
            --bg-card: #10243C;
            --accent-cyan: #00F0FF;
            --accent-lime: #CCFF00;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #6B7280;
            --border-glow: rgba(0, 240, 255, 0.35);
            --shadow-neon: 0 0 20px rgba(0, 240, 255, 0.25);
            --shadow-neon-strong: 0 0 35px rgba(0, 240, 255, 0.45);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --font-family: 'Be Vietnam Pro', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-xxl: 80px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        /* Site Header */
        .site-header {
            background: rgba(11, 26, 48, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: var(--spacing-sm) 0;
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            flex-wrap: nowrap;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .brand-logo i {
            color: var(--accent-cyan);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
        }

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

        .nav-menu {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-link-item {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 50px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link-item:hover,
        .nav-link-item.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
        }

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

        .btn-login {
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--text-primary);
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), #00B8C8);
            border: none;
            color: var(--bg-primary);
            padding: 8px 22px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
            color: var(--bg-primary);
        }

        .navbar-toggler {
            display: none;
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            width: 42px;
            height: 42px;
            border-radius: 10px;
            font-size: 1.2rem;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
        }

        .navbar-toggler:hover {
            background: rgba(0, 240, 255, 0.1);
        }

        .mobile-collapse {
            display: none;
        }

        /* Article Hero */
        .article-hero {
            background: var(--bg-secondary);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -180px;
            left: -100px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.05), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

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

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

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

        .breadcrumb-article i {
            font-size: 0.7rem;
            color: var(--text-muted);
        }

        .article-category-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: var(--spacing-sm);
            border: 1px solid rgba(0, 240, 255, 0.25);
        }

        .article-title-hero {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: var(--spacing-md);
            letter-spacing: -0.5px;
            color: var(--text-primary);
        }

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

        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

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

        /* Article Body */
        .article-main {
            padding: var(--spacing-lg) 0 var(--spacing-xl);
            background: var(--bg-primary);
        }

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

        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            border: 1px solid rgba(0, 240, 255, 0.12);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
        }

        .article-content h1,
        .article-content h2,
        .article-content h3 {
            font-weight: 700;
            margin-top: var(--spacing-lg);
            margin-bottom: var(--spacing-sm);
            line-height: 1.35;
            color: var(--text-primary);
        }

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

        .article-content h2 {
            font-size: 1.5rem;
            padding-bottom: var(--spacing-xs);
            border-bottom: 2px solid rgba(0, 240, 255, 0.15);
        }

        .article-content h3 {
            font-size: 1.25rem;
        }

        .article-content p {
            margin-bottom: var(--spacing-md);
            color: var(--text-secondary);
            font-size: 1rem;
        }

        .article-content ul,
        .article-content ol {
            margin: var(--spacing-sm) 0 var(--spacing-md) var(--spacing-md);
            color: var(--text-secondary);
        }

        .article-content li {
            margin-bottom: var(--spacing-xs);
        }

        .article-content strong {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: var(--spacing-md) 0;
            box-shadow: var(--shadow-neon);
        }

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

        .article-not-found {
            text-align: center;
            padding: var(--spacing-xl) 0;
        }

        .article-not-found i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: var(--spacing-md);
            display: block;
        }

        .article-not-found h2 {
            font-size: 1.6rem;
            margin-bottom: var(--spacing-sm);
            color: var(--text-primary);
        }

        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: var(--spacing-lg);
        }

        .btn-back-home {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-cyan), #00B8C8);
            color: var(--bg-primary);
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
        }

        .btn-back-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.55);
            color: var(--bg-primary);
        }

        /* CTA Section */
        .article-cta {
            background: var(--bg-secondary);
            padding: var(--spacing-xl) 0;
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            position: relative;
            overflow: hidden;
        }

        .article-cta::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-box {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            border: 1px solid rgba(0, 240, 255, 0.2);
            text-align: center;
            position: relative;
            z-index: 2;
            box-shadow: var(--shadow-neon);
        }

        .cta-box h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: var(--spacing-sm);
            color: var(--text-primary);
        }

        .cta-box p {
            color: var(--text-secondary);
            margin-bottom: var(--spacing-md);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-primary {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-lime), #A3CC00);
            border: none;
            color: var(--bg-primary);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-fast);
            box-shadow: 0 0 25px rgba(204, 255, 0, 0.35);
        }

        .btn-cta-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(204, 255, 0, 0.55);
            color: var(--bg-primary);
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1080;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.65), rgba(0, 0, 0, 0.65)), linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
            animation: fabBreathe 3s ease-in-out infinite;
        }

        .fab-floating:hover {
            transform: scale(1.12);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
            color: var(--accent-lime);
        }

        .fab-floating:active {
            transform: scale(0.94);
            border-color: var(--accent-lime);
        }

        .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 16px;
            height: 16px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: fabBlink 1.5s ease-in-out infinite;
        }

        @keyframes fabBreathe {
            0%, 100% {
                opacity: 0.65;
                transform: translateY(0);
            }
            50% {
                opacity: 1;
                transform: translateY(-4px);
            }
        }

        @keyframes fabBlink {
            0%, 100% {
                opacity: 1;
                box-shadow: 0 0 8px #FF007F;
            }
            50% {
                opacity: 0.4;
                box-shadow: 0 0 2px #FF007F;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            position: relative;
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-xl);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
        }

        .footer-brand i {
            color: var(--accent-cyan);
            font-size: 1.4rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
        }

        .footer-desc {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 340px;
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.3px;
        }

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

        .footer-col ul li {
            margin-bottom: var(--spacing-xs);
        }

        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
            transform: translateX(4px);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            flex-wrap: wrap;
        }

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

        .footer-trust {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        .footer-trust i {
            transition: color var(--transition-fast);
            cursor: help;
        }

        .footer-trust i:hover {
            color: var(--accent-cyan);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
            .article-content {
                padding: var(--spacing-md);
            }
        }

        @media (max-width: 768px) {
            .navbar {
                flex-wrap: wrap;
            }
            .nav-menu {
                display: none;
            }
            .navbar-toggler {
                display: flex;
            }
            .mobile-collapse {
                display: block;
                margin-top: var(--spacing-sm);
            }
            .mobile-collapse .nav-menu {
                display: flex;
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-xs);
                padding: var(--spacing-sm) 0;
            }
            .mobile-collapse .nav-link-item {
                width: 100%;
                padding: 12px 16px;
            }
            .nav-actions {
                gap: 6px;
            }
            .btn-login,
            .btn-signup {
                padding: 7px 14px;
                font-size: 0.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-sm);
            }
            .article-title-hero {
                font-size: 1.6rem;
            }
            .article-hero {
                padding: var(--spacing-lg) 0;
            }
            .article-content {
                padding: var(--spacing-sm);
                border-radius: var(--radius-md);
            }
            .article-content h1 {
                font-size: 1.5rem;
            }
            .article-content h2 {
                font-size: 1.3rem;
            }
            .fab-floating {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 var(--spacing-sm);
            }
            .brand-logo {
                font-size: 1.1rem;
            }
            .brand-logo i {
                font-size: 1.2rem;
            }
            .btn-login,
            .btn-signup {
                padding: 6px 12px;
                font-size: 0.75rem;
            }
            .navbar-toggler {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
            .article-title-hero {
                font-size: 1.4rem;
            }
            .article-meta {
                font-size: 0.8rem;
                gap: var(--spacing-sm);
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .btn-cta-primary {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #121212;
            --secondary-bg: #1C1C1E;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --text-warm-white: #F5F5F7;
            --text-muted-gold: #D4AC0D;
            --text-silver: #A6ACAF;
            --border-gold: rgba(197, 160, 89, 0.3);
            --border-gold-strong: rgba(197, 160, 89, 0.6);
            --shadow-gold: 0 4px 20px rgba(197, 160, 89, 0.15);
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 12px 40px rgba(197, 160, 89, 0.25);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3rem;
            --spacing-xl: 5rem;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-primary: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
        }

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

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

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

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

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

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

        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ===== HEADER ===== */
        .site-header {
            background: rgba(18, 18, 18, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-gold);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 0.75rem 0;
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            gap: 1rem;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent-gold);
            white-space: nowrap;
            letter-spacing: -0.01em;
        }

        .brand-logo i {
            font-size: 1.5rem;
            color: var(--accent-amber);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-link-item {
            color: var(--text-silver);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.5rem 0.75rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-link-item:hover {
            color: var(--accent-amber);
            background: rgba(197, 160, 89, 0.08);
        }

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

        .nav-link-item.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-amber);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-gold-strong);
            color: var(--accent-gold);
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
        }

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

        .btn-signup {
            background: var(--accent-gold);
            border: 1px solid var(--accent-gold);
            color: #121212;
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 700;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-signup:hover {
            background: var(--accent-amber);
            border-color: var(--accent-amber);
            color: #121212;
            transform: translateY(-1px);
            box-shadow: 0 4px 15px rgba(255, 191, 0, 0.3);
        }

        .navbar-toggler {
            display: none;
            background: transparent;
            border: 1px solid var(--border-gold-strong);
            color: var(--accent-gold);
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            transition: var(--transition);
            align-items: center;
            justify-content: center;
        }

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

        .mobile-collapse {
            display: none;
            margin-top: 0.75rem;
            padding-top: 0.75rem;
            border-top: 1px solid var(--border-gold);
        }

        .mobile-collapse.show {
            display: block;
        }

        /* ===== HERO ===== */
        .hero-category {
            background: linear-gradient(135deg, #121212 0%, #1C1C1E 50%, #2a1f0f 100%);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            position: relative;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(197, 160, 89, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 191, 0, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(197, 160, 89, 0.15);
            border: 1px solid var(--border-gold-strong);
            color: var(--accent-gold);
            padding: 0.4rem 1rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1.25rem;
        }

        .hero-badge i {
            color: var(--accent-amber);
        }

        .hero-category h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-warm-white);
            line-height: 1.25;
            margin-bottom: 1.25rem;
            letter-spacing: -0.02em;
            max-width: 800px;
        }

        .hero-category h1 .highlight {
            color: var(--accent-gold);
            position: relative;
        }

        .hero-category .lead {
            font-size: 1.15rem;
            color: var(--text-silver);
            line-height: 1.7;
            max-width: 700px;
            margin-bottom: 2rem;
        }

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

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

        .hero-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-amber);
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: 0.9rem;
            color: var(--text-silver);
            margin-top: 0.25rem;
        }

        .hero-actions {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-primary-gold {
            background: var(--accent-gold);
            border: none;
            color: #121212;
            padding: 0.85rem 2rem;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 700;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }

        .btn-primary-gold:hover {
            background: var(--accent-amber);
            color: #121212;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 191, 0, 0.35);
        }

        .btn-outline-gold {
            background: transparent;
            border: 1px solid var(--border-gold-strong);
            color: var(--accent-gold);
            padding: 0.85rem 2rem;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }

        .btn-outline-gold:hover {
            background: rgba(197, 160, 89, 0.1);
            border-color: var(--accent-amber);
            color: var(--accent-amber);
            transform: translateY(-2px);
        }

        /* ===== SECTION COMMON ===== */
        .section-padding {
            padding: var(--spacing-xl) 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-warm-white);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-silver);
            line-height: 1.7;
            max-width: 650px;
            margin-bottom: 2.5rem;
        }

        /* ===== TOOL LIST ===== */
        .tool-list-section {
            background: var(--primary-bg);
        }

        .tool-card {
            background: var(--secondary-bg);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .tool-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: var(--transition);
        }

        .tool-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-gold-strong);
        }

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

        .tool-rank {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            color: #121212;
            font-weight: 800;
            font-size: 1.1rem;
            border-radius: var(--radius-sm);
            margin-bottom: 1rem;
        }

        .tool-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-warm-white);
            margin-bottom: 0.75rem;
        }

        .tool-card .tool-desc {
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 1rem;
        }

        .tool-features {
            list-style: none;
            padding: 0;
            margin: 0 0 1.25rem 0;
        }

        .tool-features li {
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
            color: var(--text-silver);
            font-size: 0.9rem;
            padding: 0.35rem 0;
        }

        .tool-features li i {
            color: var(--accent-amber);
            margin-top: 0.2rem;
            font-size: 0.85rem;
        }

        .tool-rating {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.9rem;
        }

        .tool-rating i {
            color: var(--accent-amber);
        }

        .btn-tool-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: transparent;
            border: 1px solid var(--border-gold-strong);
            color: var(--accent-gold);
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
            margin-top: 0.5rem;
        }

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

        /* ===== COMPARISON ===== */
        .comparison-section {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-gold);
            border-bottom: 1px solid var(--border-gold);
        }

        .comparison-table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-gold);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }

        .comparison-table th {
            background: rgba(197, 160, 89, 0.1);
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 1rem 1.25rem;
            text-align: left;
            border-bottom: 1px solid var(--border-gold-strong);
        }

        .comparison-table td {
            color: var(--text-silver);
            padding: 1rem 1.25rem;
            border-bottom: 1px solid var(--border-gold);
            font-size: 0.9rem;
        }

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

        .comparison-table tr:hover td {
            background: rgba(197, 160, 89, 0.04);
        }

        .check-icon {
            color: #4CAF50;
            font-size: 1.1rem;
        }

        .times-icon {
            color: #E53935;
            font-size: 1.1rem;
        }

        /* ===== USE CASES ===== */
        .use-case-section {
            background: var(--primary-bg);
        }

        .use-case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .use-case-item {
            background: var(--secondary-bg);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            transition: var(--transition);
        }

        .use-case-item:hover {
            border-color: var(--border-gold-strong);
            box-shadow: var(--shadow-gold);
            transform: translateY(-3px);
        }

        .use-case-icon {
            width: 50px;
            height: 50px;
            background: rgba(197, 160, 89, 0.12);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
            color: var(--accent-amber);
            font-size: 1.4rem;
        }

        .use-case-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-warm-white);
            margin-bottom: 0.6rem;
        }

        .use-case-item p {
            color: var(--text-silver);
            font-size: 0.92rem;
            line-height: 1.7;
            margin: 0;
        }

        /* ===== TIPS ===== */
        .tips-section {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-gold);
            border-bottom: 1px solid var(--border-gold);
        }

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

        .tips-list li {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1.25rem 0;
            border-bottom: 1px solid var(--border-gold);
        }

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

        .tips-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            background: rgba(197, 160, 89, 0.15);
            border: 1px solid var(--border-gold-strong);
            color: var(--accent-gold);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
        }

        .tips-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-warm-white);
            margin-bottom: 0.35rem;
        }

        .tips-content p {
            color: var(--text-silver);
            font-size: 0.92rem;
            line-height: 1.7;
            margin: 0;
        }

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

        .accordion-item {
            background: var(--secondary-bg);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-md) !important;
            margin-bottom: 0.75rem;
            overflow: hidden;
        }

        .accordion-button {
            background: transparent;
            color: var(--text-warm-white);
            font-weight: 600;
            font-size: 1rem;
            padding: 1.25rem 1.5rem;
            transition: var(--transition);
        }

        .accordion-button:not(.collapsed) {
            background: rgba(197, 160, 89, 0.08);
            color: var(--accent-gold);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--border-gold-strong);
        }

        .accordion-button::after {
            filter: invert(1) brightness(0.7);
        }

        .accordion-body {
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.7;
            padding: 1.25rem 1.5rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1C1C1E 0%, #2a1f0f 50%, #121212 100%);
            padding: var(--spacing-xl) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(197, 160, 89, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-warm-white);
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
        }

        .cta-section p {
            color: var(--text-silver);
            font-size: 1.05rem;
            line-height: 1.7;
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        .cta-actions {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: #0A0A0A;
            border-top: 1px solid var(--border-gold);
            padding: var(--spacing-lg) 0 1.5rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin-bottom: 1rem;
        }

        .footer-brand i {
            color: var(--accent-amber);
        }

        .footer-desc {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .footer-col h5 {
            color: var(--accent-gold);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
        }

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

        .footer-col ul li {
            margin-bottom: 0.6rem;
        }

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

        .footer-col ul li a:hover {
            color: var(--accent-amber);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-gold);
            flex-wrap: wrap;
            gap: 1rem;
        }

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

        .footer-trust {
            display: flex;
            gap: 1.25rem;
            color: var(--accent-gold);
            font-size: 1.2rem;
        }

        /* ===== FAB ===== */
        .fab-floating {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: rgba(18, 18, 18, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid var(--accent-gold);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-amber);
            font-size: 1.4rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(197, 160, 89, 0.3);
            opacity: 0.7;
            animation: fab-float 3s ease-in-out infinite;
        }

        .fab-floating:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 30px rgba(255, 191, 0, 0.45);
            border-color: var(--accent-amber);
        }

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

        .fab-floating .notification-dot {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            background: #E53935;
            border-radius: 50%;
            border: 2px solid #121212;
            animation: blink-dot 1.5s ease-in-out infinite;
        }

        @keyframes fab-float {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-6px);
            }
        }

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

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .hero-category h1 {
                font-size: 2.3rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }

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

            .nav-menu {
                display: none;
            }

            .navbar-toggler {
                display: flex;
            }

            .mobile-collapse {
                display: none;
            }

            .mobile-collapse.show {
                display: block;
            }

            .mobile-collapse .nav-menu {
                display: flex;
                flex-direction: column;
                gap: 0.5rem;
                align-items: flex-start;
            }

            .hero-category {
                padding: var(--spacing-lg) 0;
            }

            .hero-category h1 {
                font-size: 1.9rem;
            }

            .hero-category .lead {
                font-size: 1rem;
            }

            .hero-stats {
                gap: 1.5rem;
            }

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

            .cta-section h2 {
                font-size: 1.7rem;
            }

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

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

            .btn-login, .btn-signup {
                padding: 0.45rem 0.9rem;
                font-size: 0.82rem;
            }

            .fab-floating {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 0.75rem;
                bottom: 5rem;
            }
        }

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

            .hero-category h1 {
                font-size: 1.6rem;
            }

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

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

            .hero-stats {
                gap: 1rem;
            }

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

            .use-case-grid {
                grid-template-columns: 1fr;
            }

            .nav-actions {
                gap: 0.4rem;
            }

            .btn-login, .btn-signup {
                padding: 0.4rem 0.75rem;
                font-size: 0.78rem;
            }

            .brand-logo {
                font-size: 1.1rem;
            }

            .brand-logo i {
                font-size: 1.2rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-deep: #0B1A30;
            --bg-cyber: #0F0C20;
            --bg-card: #13233F;
            --bg-card-hover: #1A2D4F;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #6B7280;
            --border-glow: rgba(0, 240, 255, 0.25);
            --border-glow-strong: rgba(0, 240, 255, 0.6);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.15);
            --shadow-neon-hover: 0 0 30px rgba(0, 240, 255, 0.35);
            --shadow-lime: 0 0 15px rgba(204, 255, 0, 0.2);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --font-body: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-body);
            background-color: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: 
                radial-gradient(circle at 15% 20%, rgba(0, 240, 255, 0.05) 0%, transparent 35%),
                radial-gradient(circle at 85% 80%, rgba(204, 255, 0, 0.04) 0%, transparent 35%),
                radial-gradient(circle at 50% 50%, rgba(15, 12, 32, 0.95) 0%, var(--bg-deep) 100%);
            background-attachment: fixed;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

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

        @media (min-width: 1024px) {
            .container {
                padding-left: 3rem;
                padding-right: 3rem;
            }
        }

        /* ============ HEADER / NAVBAR ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(11, 26, 48, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 0.75rem 0;
            transition: all var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
            border-bottom-color: rgba(0, 240, 255, 0.3);
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            flex-wrap: nowrap;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-white);
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .brand-logo i {
            color: var(--accent-cyan);
            font-size: 1.4rem;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }

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

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            margin: 0;
            padding: 0;
        }

        .nav-link-item {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-silver);
            padding: 0.4rem 0.1rem;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .nav-link-item::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            transition: width var(--transition-base);
        }

        .nav-link-item:hover {
            color: var(--text-white);
        }

        .nav-link-item:hover::after {
            width: 100%;
        }

        .nav-link-item.active {
            color: var(--accent-cyan);
        }

        .nav-link-item.active::after {
            width: 100%;
        }

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

        .btn-login {
            padding: 0.45rem 1.1rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-white);
            background: transparent;
            border: 1px solid rgba(166, 172, 175, 0.3);
            border-radius: 50px;
            transition: all var(--transition-base);
        }

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

        .btn-signup {
            padding: 0.45rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--bg-deep);
            background: var(--accent-lime);
            border-radius: 50px;
            box-shadow: var(--shadow-lime);
            transition: all var(--transition-base);
        }

        .btn-signup:hover {
            background: #e0ff3f;
            box-shadow: 0 0 25px rgba(204, 255, 0, 0.45);
            transform: translateY(-2px);
        }

        .btn-signup:active {
            transform: translateY(0);
            box-shadow: 0 0 10px rgba(204, 255, 0, 0.25);
        }

        .navbar-toggler {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: 10px;
            transition: all var(--transition-base);
        }

        .navbar-toggler:hover {
            background: rgba(0, 240, 255, 0.2);
            border-color: var(--accent-cyan);
        }

        .mobile-collapse {
            display: none;
        }

        @media (max-width: 991px) {
            .nav-menu {
                display: none;
            }

            .navbar-toggler {
                display: flex;
            }

            .mobile-collapse.show {
                display: block;
            }

            .mobile-collapse .nav-menu {
                display: flex;
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
                padding: 1rem 0 0.5rem;
                border-top: 1px solid rgba(0, 240, 255, 0.15);
                margin-top: 0.75rem;
            }

            .mobile-collapse .nav-link-item {
                font-size: 0.95rem;
                padding: 0.5rem 0;
                width: 100%;
            }

            .nav-actions {
                gap: 0.4rem;
            }

            .btn-login,
            .btn-signup {
                padding: 0.4rem 0.8rem;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .brand-logo span {
                font-size: 0.9rem;
            }

            .btn-login {
                padding: 0.35rem 0.7rem;
                font-size: 0.75rem;
            }

            .btn-signup {
                padding: 0.35rem 0.7rem;
                font-size: 0.75rem;
            }
        }

        /* ============ HERO ============ */
        .hero-section {
            position: relative;
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            background: linear-gradient(180deg, rgba(15, 12, 32, 0.7) 0%, rgba(11, 26, 48, 0.9) 100%);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.06) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .hero-status-bar {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1rem;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 50px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
        }

        .status-badge i {
            font-size: 0.65rem;
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        .status-badge.lime {
            background: rgba(204, 255, 0, 0.1);
            border-color: rgba(204, 255, 0, 0.3);
            color: var(--accent-lime);
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.4); }
        }

        .hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 1.25rem;
            letter-spacing: -0.02em;
        }

        .hero-title .highlight {
            color: var(--accent-cyan);
            text-shadow: 0 0 30px rgba(0, 240, 255, 0.4);
        }

        .hero-title .highlight-lime {
            color: var(--accent-lime);
            text-shadow: 0 0 30px rgba(204, 255, 0, 0.35);
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-silver);
            max-width: 650px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .hero-icon-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .hero-icon-item {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.6rem 1.2rem;
            background: rgba(19, 35, 63, 0.7);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: 12px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-silver);
            transition: all var(--transition-base);
        }

        .hero-icon-item i {
            color: var(--accent-cyan);
            font-size: 1rem;
        }

        .hero-icon-item:hover {
            border-color: rgba(0, 240, 255, 0.4);
            background: rgba(19, 35, 63, 0.9);
            color: var(--text-white);
            transform: translateY(-2px);
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }

        .btn-primary-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.85rem 2rem;
            font-size: 1rem;
            font-weight: 700;
            color: var(--bg-deep);
            background: var(--accent-lime);
            border-radius: 50px;
            box-shadow: var(--shadow-lime);
            transition: all var(--transition-base);
        }

        .btn-primary-cta:hover {
            background: #e0ff3f;
            box-shadow: 0 0 35px rgba(204, 255, 0, 0.5);
            transform: translateY(-3px);
        }

        .btn-primary-cta:active {
            transform: translateY(0);
            box-shadow: 0 0 15px rgba(204, 255, 0, 0.3);
        }

        .btn-secondary-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.85rem 1.8rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.4);
            border-radius: 50px;
            transition: all var(--transition-base);
        }

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

        /* ============ SECTION COMMON ============ */
        .section-block {
            padding: var(--spacing-lg) 0;
            position: relative;
        }

        .section-block.alt-bg {
            background: rgba(15, 12, 32, 0.5);
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            border-bottom: 1px solid rgba(0, 240, 255, 0.08);
        }

        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 0.75rem;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 0.75rem;
        }

        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.3rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-silver);
            line-height: 1.7;
            max-width: 720px;
            margin-bottom: 2rem;
        }

        .section-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.25), transparent);
            margin: 2rem 0;
        }

        /* ============ FEATURE HIGHLIGHT ============ */
        .feature-panel {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
            margin-bottom: 2.5rem;
        }

        .feature-panel.reverse {
            direction: rtl;
        }

        .feature-panel.reverse > * {
            direction: ltr;
        }

        .feature-text {
            text-align: left;
        }

        .feature-text .section-title {
            margin-bottom: 1rem;
        }

        .feature-text .section-desc {
            margin-bottom: 1.5rem;
        }

        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            margin-bottom: 1.5rem;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.7rem;
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.5;
        }

        .feature-list li i {
            color: var(--accent-lime);
            margin-top: 0.2rem;
            flex-shrink: 0;
        }

        .feature-image-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.2);
            box-shadow: var(--shadow-neon);
        }

        .feature-image-wrap img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

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

        .feature-image-wrap::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 40%;
            background: linear-gradient(180deg, transparent, rgba(11, 26, 48, 0.7));
            pointer-events: none;
        }

        @media (max-width: 768px) {
            .feature-panel {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .feature-panel.reverse {
                direction: ltr;
            }

            .feature-image-wrap img {
                height: 240px;
            }
        }

        /* ============ SCENARIO CARDS ============ */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .scenario-card {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .scenario-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-lime));
            opacity: 0;
            transition: opacity var(--transition-base);
        }

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

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

        .scenario-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 12px;
            margin-bottom: 1rem;
            font-size: 1.3rem;
            color: var(--accent-cyan);
        }

        .scenario-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-white);
        }

        .scenario-card p {
            font-size: 0.9rem;
            color: var(--text-silver);
            line-height: 1.6;
            margin-bottom: 0;
        }

        @media (max-width: 991px) {
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 576px) {
            .scenario-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ============ PROCESS STEPS ============ */
        .process-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.25rem;
        }

        .process-item {
            text-align: left;
            padding: 1.5rem;
            background: rgba(19, 35, 63, 0.6);
            border-radius: var(--radius-md);
            border: 1px solid rgba(0, 240, 255, 0.1);
            transition: all var(--transition-base);
        }

        .process-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
            background: rgba(19, 35, 63, 0.85);
        }

        .process-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--bg-deep);
            background: var(--accent-cyan);
            border-radius: 50%;
            margin-bottom: 1rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
        }

        .process-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .process-item p {
            font-size: 0.85rem;
            color: var(--text-silver);
            line-height: 1.55;
            margin-bottom: 0;
        }

        @media (max-width: 991px) {
            .process-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            max-width: 850px;
        }

        .faq-item {
            background: rgba(19, 35, 63, 0.6);
            border: 1px solid rgba(0, 240, 255, 0.12);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            background: transparent;
            border: none;
            cursor: pointer;
            transition: color var(--transition-fast);
        }

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

        .faq-question i {
            font-size: 0.9rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }

        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 1.5rem 1.25rem;
            font-size: 0.92rem;
            color: var(--text-silver);
            line-height: 1.7;
        }

        .faq-answer p {
            margin-bottom: 0;
        }

        /* ============ CTA SECTION ============ */
        .cta-section {
            padding: var(--spacing-lg) 0;
            text-align: left;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.06) 0%, rgba(204, 255, 0, 0.04) 100%);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 400px;
            height: 100%;
            background: radial-gradient(ellipse, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
        }

        .cta-text {
            flex: 1;
            min-width: 280px;
        }

        .cta-text .section-title {
            margin-bottom: 0.75rem;
        }

        .cta-text p {
            font-size: 1rem;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 550px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            flex-shrink: 0;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: rgba(15, 12, 32, 0.85);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: var(--spacing-lg) 0 1.5rem;
            position: relative;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 1rem;
        }

        .footer-brand i {
            color: var(--accent-cyan);
            font-size: 1.4rem;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }

        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-silver);
            line-height: 1.7;
            max-width: 380px;
        }

        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 1rem;
            letter-spacing: 0.03em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-silver);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(0, 240, 255, 0.1);
        }

        .footer-copyright {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .footer-trust {
            display: flex;
            gap: 1rem;
            font-size: 1.1rem;
            color: rgba(0, 240, 255, 0.6);
        }

        .footer-trust i {
            transition: color var(--transition-fast);
        }

        .footer-trust i:hover {
            color: var(--accent-cyan);
        }

        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

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

        /* ============ FAB ============ */
        .fab-support {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 1040;
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            border-radius: 50%;
            background-clip: padding-box;
            position: relative;
            transition: all var(--transition-base);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab-support::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            z-index: -1;
            opacity: 0.6;
            transition: opacity var(--transition-base);
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            animation: none;
        }

        .fab-support:hover::before {
            opacity: 1;
        }

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

        .fab-support i {
            font-size: 1.3rem;
            color: var(--text-white);
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.6);
            transition: all var(--transition-base);
        }

        .fab-support:hover i {
            animation: icon-flicker 0.4s ease;
        }

        .fab-support .notification-dot {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--bg-deep);
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { opacity: 0.6; box-shadow: 0 0 15px rgba(0, 240, 255, 0.2); }
            50% { opacity: 0.9; box-shadow: 0 0 25px rgba(0, 240, 255, 0.4); }
        }

        @keyframes icon-flicker {
            0% { opacity: 0.3; }
            30% { opacity: 1; }
            50% { opacity: 0.5; }
            70% { opacity: 1; }
            100% { opacity: 0.8; }
        }

        @media (max-width: 520px) {
            .fab-support {
                width: 48px;
                height: 48px;
                left: 0.75rem;
                bottom: 5rem;
            }

            .fab-support i {
                font-size: 1.1rem;
            }
        }

        /* ============ UTILITIES ============ */
        .text-left {
            text-align: left;
        }

        .mb-0 {
            margin-bottom: 0 !important;
        }

        .gap-2 {
            gap: 0.5rem;
        }

        .mt-2 {
            margin-top: 0.5rem;
        }

        .w-100 {
            width: 100%;
        }

/* roulang page: category3 */
:root {
            --bg-deep: #0F0C20;
            --bg-ocean: #0B1A30;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --border-glow: rgba(0, 240, 255, 0.35);
            --card-bg: rgba(15, 12, 32, 0.82);
            --card-hover: rgba(0, 240, 255, 0.08);
            --shadow-neon: 0 0 18px rgba(0, 240, 255, 0.3);
            --shadow-soft: 0 12px 32px rgba(0, 0, 0, 0.45);
            --radius-md: 14px;
            --radius-lg: 22px;
            --font-primary: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.32s cubic-bezier(0.22, 1, 0.36, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-primary);
            background: radial-gradient(ellipse at 20% 10%, var(--bg-ocean) 0%, var(--bg-deep) 65%, #050510 100%);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        button {
            font-family: inherit;
        }

        ::selection {
            background: var(--accent-cyan);
            color: #0B0B0B;
        }

        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* Header */
        .site-header {
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
            position: sticky;
            top: 0;
            z-index: 1040;
            padding: 0.65rem 0;
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-white);
            letter-spacing: 0.02em;
        }

        .brand-logo i {
            color: var(--accent-cyan);
            font-size: 1.5rem;
            text-shadow: 0 0 14px rgba(0, 240, 255, 0.7);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-link-item {
            display: inline-block;
            padding: 0.5rem 0.85rem;
            border-radius: 50px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-silver);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link-item:hover,
        .nav-link-item.active {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
        }

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

        .btn-login,
        .btn-signup {
            border-radius: 50px;
            padding: 0.45rem 1.15rem;
            font-size: 0.9rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.3);
        }

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

        .btn-signup {
            background: var(--accent-cyan);
            color: #0B0B0B;
            border: 1px solid var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.35);
        }

        .btn-signup:hover {
            background: var(--accent-lime);
            border-color: var(--accent-lime);
            color: #0B0B0B;
            box-shadow: 0 0 26px rgba(204, 255, 0, 0.5);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 8px;
            color: var(--text-white);
            padding: 0.4rem 0.7rem;
            font-size: 1.2rem;
            display: none;
        }

        .mobile-collapse {
            width: 100%;
            margin-top: 0.75rem;
        }

        .mobile-collapse .nav-menu {
            flex-direction: column;
            align-items: flex-start;
            gap: 0.25rem;
        }

        .mobile-collapse .nav-link-item {
            width: 100%;
            padding: 0.7rem 1rem;
        }

        /* Hero */
        .hero-live {
            position: relative;
            padding: 3.5rem 0 2.5rem;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
        }

        .hero-live::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 12, 32, 0.92) 0%, rgba(11, 26, 48, 0.8) 55%, rgba(5, 5, 16, 0.88) 100%);
            z-index: 1;
        }

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

        .live-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(204, 255, 0, 0.14);
            border: 1px solid rgba(204, 255, 0, 0.4);
            color: var(--accent-lime);
            border-radius: 50px;
            padding: 0.35rem 1rem;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            text-transform: uppercase;
            margin-bottom: 1.25rem;
        }

        .live-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--accent-lime);
            animation: pulse-dot 1.2s infinite;
        }

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

        .hero-title {
            font-size: 2.9rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.25rem;
            letter-spacing: -0.01em;
            background: linear-gradient(120deg, #FFFFFF 20%, var(--accent-cyan) 80%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            max-width: 900px;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-silver);
            max-width: 720px;
            line-height: 1.7;
            margin-bottom: 1.75rem;
        }

        .countdown-wrap {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
            margin-bottom: 1.75rem;
        }

        .countdown-box {
            background: rgba(15, 12, 32, 0.85);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-md);
            padding: 0.85rem 1.5rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            box-shadow: var(--shadow-soft);
        }

        .countdown-item {
            text-align: center;
            min-width: 56px;
        }

        .countdown-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.1;
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
        }

        .countdown-label {
            font-size: 0.75rem;
            color: var(--text-silver);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .countdown-sep {
            font-size: 1.6rem;
            color: var(--accent-cyan);
            font-weight: 700;
            opacity: 0.6;
        }

        .btn-hero {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: #0B0B0B;
            border: none;
            border-radius: 50px;
            padding: 0.85rem 2rem;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.01em;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.4);
            cursor: pointer;
        }

        .btn-hero:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(204, 255, 0, 0.55);
            color: #0B0B0B;
        }

        .btn-hero-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.35);
            border-radius: 50px;
            padding: 0.85rem 2rem;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

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

        /* Section spacing */
        .section-pad {
            padding: 3.25rem 0;
        }

        .section-header {
            margin-bottom: 2.25rem;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .section-lead {
            color: var(--text-silver);
            font-size: 1.05rem;
            max-width: 680px;
            line-height: 1.7;
        }

        /* Feature cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 1.25rem;
        }

        .feature-card {
            background: var(--card-bg);
            border: 1px solid rgba(0, 240, 255, 0.18);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: all var(--transition-smooth);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        .feature-card:hover {
            border-color: var(--accent-cyan);
            background: var(--card-hover);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.35rem;
            margin-bottom: 1rem;
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }

        .feature-card p {
            color: var(--text-silver);
            font-size: 0.93rem;
            line-height: 1.65;
            margin: 0;
        }

        /* Steps */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .step-item {
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            padding: 1.25rem 1.5rem;
            background: rgba(15, 12, 32, 0.6);
            border-left: 3px solid var(--accent-cyan);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            transition: background var(--transition-fast);
        }

        .step-item:hover {
            background: rgba(0, 240, 255, 0.07);
        }

        .step-num {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            color: #0B0B0B;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.05rem;
        }

        .step-content h4 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }

        .step-content p {
            color: var(--text-silver);
            font-size: 0.93rem;
            margin: 0;
            line-height: 1.65;
        }

        /* Tool ranking */
        .tool-card {
            background: var(--card-bg);
            border: 1px solid rgba(0, 240, 255, 0.18);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .tool-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-neon);
            transform: translateY(-5px);
        }

        .tool-card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .tool-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .tool-card:hover .tool-card-img img {
            transform: scale(1.06);
        }

        .tool-rank {
            position: absolute;
            top: 0.85rem;
            left: 0.85rem;
            background: rgba(15, 12, 32, 0.9);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            border-radius: 50px;
            padding: 0.25rem 0.8rem;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            backdrop-filter: blur(6px);
        }

        .tool-card-body {
            padding: 1.25rem 1.35rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .tool-card-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }

        .tool-card-body p {
            color: var(--text-silver);
            font-size: 0.92rem;
            line-height: 1.65;
            flex: 1;
        }

        .tool-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.45rem;
            margin-top: 0.9rem;
        }

        .tag-badge {
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.22);
            color: var(--accent-cyan);
            border-radius: 50px;
            padding: 0.2rem 0.7rem;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .tag-badge.lime {
            background: rgba(204, 255, 0, 0.1);
            border-color: rgba(204, 255, 0, 0.3);
            color: var(--accent-lime);
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(204, 255, 0, 0.05));
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            text-align: center;
        }

        .cta-title {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .cta-lead {
            color: var(--text-silver);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 1.5rem;
            line-height: 1.7;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.9rem;
        }

        .faq-item {
            background: rgba(15, 12, 32, 0.65);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.4);
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            color: var(--text-white);
            padding: 1.1rem 1.4rem;
            font-size: 1rem;
            font-weight: 600;
            text-align: left;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            cursor: pointer;
            transition: color var(--transition-fast);
        }

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

        .faq-icon {
            flex-shrink: 0;
            color: var(--accent-cyan);
            font-size: 0.85rem;
            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-smooth), padding var(--transition-smooth);
            padding: 0 1.4rem;
            color: var(--text-silver);
            font-size: 0.93rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.4rem 1.25rem;
        }

        /* Footer */
        .site-footer {
            background: rgba(5, 5, 16, 0.95);
            border-top: 1px solid rgba(0, 240, 255, 0.12);
            padding: 3rem 0 1.5rem;
            margin-top: 1rem;
        }

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

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 0.9rem;
        }

        .footer-brand i {
            color: var(--accent-cyan);
            text-shadow: 0 0 14px rgba(0, 240, 255, 0.6);
        }

        .footer-desc {
            color: var(--text-silver);
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 380px;
            margin: 0;
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.9rem;
            color: var(--text-white);
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

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

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .footer-trust {
            display: flex;
            gap: 1rem;
            color: var(--accent-cyan);
            font-size: 1.1rem;
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(15, 12, 32, 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;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            transition: all var(--transition-smooth);
            cursor: pointer;
            opacity: 0.65;
            animation: fab-breathe 3s infinite;
        }

        .fab-support::before {
            content: "";
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            z-index: -1;
            opacity: 0.7;
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.08);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.7);
            color: var(--accent-lime);
        }

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

        .fab-notify {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #FF007F;
            border: 2px solid var(--bg-deep);
            animation: pulse-dot 1.4s infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { opacity: 0.65; }
            50% { opacity: 0.95; }
        }

        /* Responsive */
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.3rem;
            }

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

            .nav-menu {
                display: none;
            }

            .navbar-toggler {
                display: inline-flex;
            }

            .mobile-collapse .nav-menu {
                display: flex;
            }
        }

        @media (max-width: 768px) {
            .hero-title {
                font-size: 1.9rem;
            }

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

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

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

            .cta-section {
                padding: 2rem 1.25rem;
            }

            .cta-title {
                font-size: 1.5rem;
            }

            .countdown-box {
                flex-wrap: wrap;
                padding: 0.75rem 1rem;
            }

            .countdown-num {
                font-size: 1.4rem;
            }

            .fab-support {
                bottom: 4.5rem;
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
        }

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

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

            .hero-live {
                padding: 2.25rem 0 1.75rem;
            }

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

            .btn-login,
            .btn-signup {
                padding: 0.4rem 0.85rem;
                font-size: 0.82rem;
            }

            .navbar {
                gap: 0.5rem;
            }

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

            .step-item {
                flex-direction: column;
                gap: 0.75rem;
                padding: 1rem 1.1rem;
            }

            .countdown-item {
                min-width: 44px;
            }

            .countdown-num {
                font-size: 1.2rem;
            }
        }