/* roulang page: index */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --accent-yellow: #FFD700;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --card-bg: rgba(13, 17, 30, 0.85);
            --card-border: rgba(0, 82, 255, 0.3);
            --card-hover-border: #0052FF;
            --gradient-neon: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-hot: linear-gradient(135deg, #FF007F 0%, #FFD700 100%);
            --shadow-neon: 0 0 20px rgba(0, 82, 255, 0.4);
            --shadow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --font-body: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

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

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

        button, .btn {
            cursor: pointer;
            font-family: var(--font-body);
            border: none;
            outline: none;
            transition: var(--transition-smooth);
        }

        button:focus-visible, .btn:focus-visible, a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* NAVIGATION */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            transition: var(--transition-smooth);
            padding: 0.6rem 0;
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--gradient-neon);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            box-shadow: var(--shadow-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li a {
            display: block;
            padding: 0.5rem 1rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
        }

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

        .nav-menu li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-cyan);
        }

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

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
        }

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

        .btn-signup {
            background: var(--gradient-neon);
            color: #fff;
            padding: 0.5rem 1.6rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: var(--shadow-neon);
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: var(--shadow-cyan);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.25rem;
            cursor: pointer;
        }

        @media (max-width: 992px) {
            .nav-menu {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(13, 17, 30, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 5rem 1.5rem 2rem;
                gap: 0.5rem;
                transition: right 0.35s ease;
                z-index: 999;
                border-left: 1px solid var(--card-border);
            }

            .nav-menu.open {
                right: 0;
            }

            .nav-menu li {
                width: 100%;
            }

            .nav-menu li a {
                padding: 0.75rem 1rem;
                font-size: 1.05rem;
                width: 100%;
            }

            .mobile-toggle {
                display: block;
                z-index: 1001;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1.1rem;
            }
            .btn-signup, .btn-login {
                padding: 0.45rem 1rem;
                font-size: 0.85rem;
            }
            .header-actions {
                gap: 0.5rem;
            }
        }

        /* HERO SECTION */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            padding: 7rem 0 4rem;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            background-attachment: fixed;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(8, 9, 15, 0.88) 0%, rgba(13, 17, 30, 0.82) 50%, rgba(8, 9, 15, 0.9) 100%);
            z-index: 1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 180px;
            background: linear-gradient(to top, var(--primary-bg) 0%, transparent 100%);
            z-index: 2;
        }

        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 740px;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.35);
            color: var(--accent-cyan);
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 0.5px;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(4px);
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            font-family: var(--font-heading);
            color: var(--text-primary);
        }

        .hero-title span {
            background: var(--gradient-hot);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 2rem;
            max-width: 600px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2.5rem;
        }

        .btn-primary-hero {
            background: var(--gradient-neon);
            color: #fff;
            padding: 0.9rem 2.2rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: var(--shadow-neon);
            border: none;
        }

        .btn-primary-hero:hover {
            box-shadow: var(--shadow-cyan);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline-hero {
            background: transparent;
            color: var(--text-primary);
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            padding: 0.9rem 2.2rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.05rem;
        }

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

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1.5rem;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .hero-trust i {
            color: var(--accent-cyan);
            margin-right: 0.4rem;
        }

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

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

        .hero-stat-number {
            font-size: 2rem;
            font-weight: 900;
            background: var(--gradient-neon);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.2rem;
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: auto;
                padding: 6rem 0 3rem;
                background-attachment: scroll;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .hero-stat-number {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn-primary-hero, .btn-outline-hero {
                width: 100%;
                text-align: center;
            }
        }

        /* SECTION GENERAL */
        .section-padding {
            padding: 5rem 0;
        }

        .section-header {
            margin-bottom: 3rem;
        }

        .section-tag {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            padding: 0.3rem 1rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.8rem;
            letter-spacing: 0.5px;
            margin-bottom: 0.75rem;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            font-family: var(--font-heading);
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 3.5rem 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
        }

        /* GROUP BUY SECTION */
        .group-buy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
        }

        .group-buy-card {
            background: var(--card-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .group-buy-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--gradient-neon);
            opacity: 0;
            transition: var(--transition-smooth);
        }

        .group-buy-card:hover {
            border-color: var(--card-hover-border);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
        }

        .group-buy-card:hover::before {
            opacity: 1;
        }

        .group-buy-icon {
            font-size: 2.5rem;
            color: var(--accent-cyan);
            margin-bottom: 1.25rem;
        }

        .group-buy-card h4 {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.6rem;
        }

        .group-buy-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 1.25rem;
        }

        .group-buy-progress {
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50px;
            height: 10px;
            margin-bottom: 0.75rem;
            overflow: hidden;
        }

        .group-buy-progress-bar {
            height: 100%;
            background: var(--gradient-neon);
            border-radius: 50px;
            transition: width 0.6s ease;
        }

        .group-buy-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* HOT DEALS SECTION */
        .deals-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .deal-card {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 215, 0, 0.25);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            transition: var(--transition-smooth);
            position: relative;
        }

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

        .deal-tag {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--gradient-hot);
            color: #fff;
            padding: 0.25rem 0.8rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
        }

        .deal-value {
            font-size: 2.8rem;
            font-weight: 900;
            background: var(--gradient-hot);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
        }

        .deal-title {
            font-weight: 700;
            font-size: 1.15rem;
            margin: 0.75rem 0 0.5rem;
        }

        .deal-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 1.25rem;
        }

        .btn-deal {
            background: transparent;
            border: 1.5px solid var(--accent-yellow);
            color: var(--accent-yellow);
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            width: 100%;
        }

        .btn-deal:hover {
            background: rgba(255, 215, 0, 0.12);
            box-shadow: var(--shadow-gold);
            color: var(--accent-yellow);
        }

        /* NEWS / CMS LIST SECTION */
        .news-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2.5rem;
        }

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

        .news-item {
            display: flex;
            gap: 1.5rem;
            padding: 1.25rem 1.5rem;
            background: var(--card-bg);
            border: 1px solid transparent;
            border-radius: var(--radius-md);
            transition: var(--transition-smooth);
            align-items: center;
        }

        .news-item:hover {
            border-color: var(--card-hover-border);
            box-shadow: 0 0 18px rgba(0, 82, 255, 0.2);
        }

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

        .news-item-meta {
            font-size: 0.8rem;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 0.3rem;
        }

        .news-item-title {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            margin-bottom: 0.3rem;
        }

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

        .news-item-excerpt {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .news-sidebar {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            height: fit-content;
        }

        .news-sidebar h5 {
            font-weight: 700;
            margin-bottom: 1.2rem;
            color: var(--accent-cyan);
        }

        .news-sidebar-item {
            padding: 0.6rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.9rem;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition-fast);
        }

        .news-sidebar-item:hover {
            color: var(--accent-cyan);
        }

        @media (max-width: 768px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
        }

        /* TIMELINE SECTION */
        .timeline {
            position: relative;
            padding-left: 2.5rem;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            width: 2px;
            height: 100%;
            background: linear-gradient(to bottom, var(--accent-cyan), var(--accent-blue));
            border-radius: 1px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 2rem;
            padding-left: 2rem;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -2.5rem;
            top: 8px;
            width: 14px;
            height: 14px;
            background: var(--accent-cyan);
            border-radius: 50%;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.7);
        }

        .timeline-date {
            font-size: 0.8rem;
            color: var(--accent-cyan);
            font-weight: 700;
            margin-bottom: 0.3rem;
        }

        .timeline-title {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 0.4rem;
        }

        .timeline-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* SAFETY SECTION */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.5rem;
        }

        .safety-card {
            background: var(--card-bg);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: var(--transition-smooth);
        }

        .safety-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan);
        }

        .safety-icon {
            font-size: 2.8rem;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }

        .safety-card h5 {
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .safety-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        /* CTA SECTION */
        .cta-section {
            background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            position: relative;
            padding: 5rem 0;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(8, 9, 15, 0.85);
        }

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

        .cta-inner h2 {
            font-size: 2.4rem;
            font-weight: 900;
            margin-bottom: 1rem;
        }

        .cta-inner p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta {
            background: var(--gradient-hot);
            color: #fff;
            padding: 1rem 3rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 0 24px rgba(255, 0, 127, 0.5);
            border: none;
        }

        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 36px rgba(255, 215, 0, 0.6);
            color: #fff;
        }

        @media (max-width: 768px) {
            .cta-inner h2 {
                font-size: 1.8rem;
            }
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            width: 54px;
            height: 54px;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            border-image: var(--gradient-neon) 1;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan);
            transition: var(--transition-smooth);
            cursor: pointer;
            animation: fabFloat 3s ease-in-out infinite;
        }

        .fab-left:hover {
            transform: scale(1.12);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
        }

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

        @media (max-width: 520px) {
            .fab-left {
                width: 46px;
                height: 46px;
                left: 1rem;
                bottom: 5rem;
                font-size: 1.2rem;
            }
        }

        /* FOOTER */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(0, 82, 255, 0.3);
            padding: 3rem 0 1.5rem;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-col h6 {
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }

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

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

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.88rem;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            color: var(--text-muted);
            font-size: 0.82rem;
        }

        .no-items {
            color: var(--text-muted);
            padding: 1.5rem;
            text-align: center;
            font-style: italic;
        }

/* roulang page: article */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --accent-yellow: #FFD700;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --card-bg: rgba(13, 17, 30, 0.85);
            --card-border: rgba(0, 82, 255, 0.3);
            --card-hover-border: #0052FF;
            --gradient-neon: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-hot: linear-gradient(135deg, #FF007F 0%, #FFD700 100%);
            --shadow-neon: 0 0 20px rgba(0, 82, 255, 0.4);
            --shadow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --font-body: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            background-color: var(--primary-bg);
            color: var(--text-primary);
            font-family: var(--font-body);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

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

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

        button,
        .btn {
            cursor: pointer;
            font-family: var(--font-body);
            border: none;
            outline: none;
            transition: var(--transition-smooth);
        }

        button:focus-visible,
        .btn:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* NAVIGATION */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            transition: var(--transition-smooth);
            padding: 0.6rem 0;
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--gradient-neon);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            box-shadow: var(--shadow-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li a {
            display: block;
            padding: 0.5rem 1rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
        }

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

        .nav-menu li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-cyan);
        }

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

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
        }

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

        .btn-signup {
            background: var(--gradient-neon);
            color: #fff;
            padding: 0.5rem 1.6rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: var(--shadow-neon);
            white-space: nowrap;
        }

        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 0 28px rgba(0, 82, 255, 0.6);
            color: #fff;
        }

        .mobile-menu-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.4rem;
        }

        /* ARTICLE HERO */
        .article-hero {
            padding: 8rem 0 3rem;
            text-align: left;
        }

        .article-hero .category-badge {
            display: inline-block;
            background: var(--gradient-neon);
            color: #fff;
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.85rem;
            margin-bottom: 1.2rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .article-hero h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 1.5rem;
        }

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

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

        /* ARTICLE CONTENT */
        .article-content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding-bottom: 4rem;
        }

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

        .article-featured-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 2rem;
            box-shadow: var(--shadow-neon);
            border: 1px solid var(--card-border);
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        .article-body h2 {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 2.5rem 0 1rem;
            line-height: 1.3;
        }

        .article-body h3 {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 2rem 0 0.8rem;
            line-height: 1.3;
        }

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

        .article-body ul,
        .article-body ol {
            margin: 1rem 0 1.5rem 1.5rem;
        }

        .article-body li {
            margin-bottom: 0.5rem;
        }

        .article-body blockquote {
            background: var(--card-bg);
            border-left: 4px solid var(--accent-cyan);
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-primary);
            font-style: italic;
            box-shadow: var(--shadow-cyan);
        }

        .article-body strong {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .article-body a {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-body a:hover {
            color: var(--accent-yellow);
        }

        /* ARTICLE SIDEBAR */
        .article-sidebar {
            position: sticky;
            top: 6rem;
            align-self: start;
        }

        .sidebar-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(10px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        }

        .sidebar-card h4 {
            font-family: var(--font-heading);
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--accent-cyan);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-card ul li {
            margin-bottom: 0.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .sidebar-card ul li:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }

        .sidebar-card ul li a {
            color: var(--text-secondary);
            font-size: 0.95rem;
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
            transition: var(--transition-fast);
        }

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

        .sidebar-card ul li a i {
            color: var(--accent-blue);
            margin-top: 0.2rem;
            flex-shrink: 0;
        }

        .cta-sidebar {
            background: var(--gradient-neon);
            color: #fff;
            border: none;
            text-align: center;
            box-shadow: var(--shadow-neon);
        }

        .cta-sidebar h4 {
            color: #fff;
        }

        .cta-sidebar p {
            font-size: 0.9rem;
            margin-bottom: 1.2rem;
            opacity: 0.95;
        }

        .btn-sidebar-cta {
            display: block;
            width: 100%;
            background: #fff;
            color: var(--accent-blue);
            padding: 0.75rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            text-align: center;
            font-size: 0.95rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }

        .btn-sidebar-cta:hover {
            background: var(--accent-yellow);
            color: #000;
            transform: translateY(-2px);
        }

        /* NOT FOUND */
        .article-not-found {
            text-align: center;
            padding: 5rem 2rem;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--card-border);
        }

        .article-not-found i {
            font-size: 4rem;
            color: var(--accent-cyan);
            margin-bottom: 1.5rem;
        }

        .article-not-found h2 {
            font-family: var(--font-heading);
            font-size: 2rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 2rem;
        }

        /* CTA SECTION */
        .cta-section {
            background: var(--secondary-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-xl);
            padding: 3rem;
            text-align: center;
            margin: 3rem 0;
            box-shadow: var(--shadow-neon);
        }

        .cta-section h2 {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .cta-section p {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-glow {
            display: inline-block;
            background: var(--gradient-hot);
            color: #fff;
            padding: 0.9rem 2.5rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 0 24px rgba(255, 0, 127, 0.5);
            transition: var(--transition-smooth);
        }

        .btn-cta-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 36px rgba(255, 0, 127, 0.7);
            color: #fff;
        }

        /* FOOTER */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(0, 82, 255, 0.3);
            padding: 3.5rem 0 1.5rem;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-col h6 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .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-muted);
            transition: var(--transition-fast);
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1050;
            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-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            transition: var(--transition-smooth);
            cursor: pointer;
            animation: fab-float 3s ease-in-out infinite;
        }

        .fab-left::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            padding: 2px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
        }

        .fab-left:hover {
            transform: scale(1.12);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
            color: #fff;
        }

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

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

        /* RESPONSIVE */
        @media (max-width: 991.98px) {
            .article-content-wrapper {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .article-sidebar {
                position: static;
                top: auto;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 767.98px) {
            .mobile-menu-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 1rem;
                border-bottom: 1px solid rgba(0, 82, 255, 0.3);
                gap: 0.5rem;
            }
            .nav-menu.mobile-open {
                display: flex;
            }
            .nav-menu li a {
                width: 100%;
                text-align: center;
                padding: 0.75rem;
                font-size: 1rem;
            }
            .cta-section {
                padding: 2rem 1.5rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .article-hero {
                padding-top: 6rem;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }

        @media (max-width: 575.98px) {
            .header-actions .btn-login {
                padding: 0.45rem 0.9rem;
                font-size: 0.8rem;
            }
            .header-actions .btn-signup {
                padding: 0.45rem 0.9rem;
                font-size: 0.8rem;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
            .article-body {
                font-size: 0.95rem;
            }
            .article-body h2 {
                font-size: 1.35rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
            .fab-left {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 1rem;
                bottom: 5rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --accent-yellow: #FFD700;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --card-bg: rgba(13, 17, 30, 0.85);
            --card-border: rgba(0, 82, 255, 0.3);
            --card-hover-border: #0052FF;
            --gradient-neon: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-hot: linear-gradient(135deg, #FF007F 0%, #FFD700 100%);
            --shadow-neon: 0 0 20px rgba(0, 82, 255, 0.4);
            --shadow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --font-body: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            background-color: var(--primary-bg);
            color: var(--text-primary);
            font-family: var(--font-body);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

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

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

        button,
        .btn {
            cursor: pointer;
            font-family: var(--font-body);
            border: none;
            outline: none;
            transition: var(--transition-smooth);
        }

        button:focus-visible,
        .btn:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
        }

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

        /* NAVIGATION */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            transition: var(--transition-smooth);
            padding: 0.6rem 0;
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--gradient-neon);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            box-shadow: var(--shadow-neon);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li a {
            display: block;
            padding: 0.5rem 1rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
        }
        .nav-menu li a:hover,
        .nav-menu li a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }
        .nav-menu li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-cyan);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
        }
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }
        .btn-signup {
            background: var(--gradient-neon);
            color: #fff;
            padding: 0.5rem 1.6rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: var(--shadow-neon);
            white-space: nowrap;
        }
        .btn-signup:hover {
            box-shadow: 0 0 28px rgba(0, 82, 255, 0.7);
            transform: translateY(-1px);
        }

        /* Mobile nav */
        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
        }
        @media (max-width: 991px) {
            .mobile-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1rem 1.5rem;
                gap: 0.5rem;
                border-bottom: 1px solid var(--card-border);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li a {
                width: 100%;
                padding: 0.75rem 1rem;
                font-size: 1rem;
            }
            .header-actions {
                gap: 0.5rem;
            }
            .btn-login, .btn-signup {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
        }

        /* PAGE HERO */
        .page-hero {
            background: linear-gradient(135deg, rgba(0,82,255,0.15) 0%, rgba(0,240,255,0.05) 100%);
            padding: 8rem 0 4rem;
            border-bottom: 1px solid rgba(0,240,255,0.15);
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(0,240,255,0.1) 0%, transparent 70%);
            border-radius: 50%;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            background: var(--gradient-neon);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 1.2rem;
        }
        .page-hero .lead {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 700px;
        }

        /* SECTION STYLES */
        section {
            padding: 4rem 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 2.5rem;
        }

        /* STEPS */
        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            backdrop-filter: blur(10px);
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .step-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan);
            transform: translateY(-3px);
        }
        .step-number {
            font-size: 3rem;
            font-weight: 800;
            background: var(--gradient-neon);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            margin-bottom: 0.5rem;
        }

        /* COMPARISON TABLE */
        .comparison-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            backdrop-filter: blur(10px);
            transition: var(--transition-smooth);
            height: 100%;
            text-align: left;
        }
        .comparison-card.recommended {
            border-color: var(--accent-yellow);
            box-shadow: var(--shadow-gold);
            position: relative;
            z-index: 1;
        }
        .comparison-card.recommended::before {
            content: 'Đề Xuất';
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--gradient-hot);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
        }

        /* FAQ */
        .accordion-button {
            background: var(--card-bg) !important;
            color: var(--text-primary) !important;
            border: 1px solid var(--card-border) !important;
            border-radius: var(--radius-md) !important;
            font-weight: 600;
            margin-bottom: 0.5rem;
            transition: var(--transition-fast);
        }
        .accordion-button:not(.collapsed) {
            background: rgba(0,240,255,0.1) !important;
            border-color: var(--accent-cyan) !important;
            box-shadow: 0 0 12px rgba(0,240,255,0.3);
            color: var(--accent-cyan) !important;
        }
        .accordion-item {
            background: transparent !important;
            border: none !important;
            margin-bottom: 0.8rem;
        }
        .accordion-body {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-top: none;
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            color: var(--text-secondary);
            padding: 1.2rem;
            line-height: 1.65;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(0,82,255,0.2) 0%, rgba(0,240,255,0.1) 100%);
            border-radius: var(--radius-xl);
            padding: 3rem 2rem;
            text-align: left;
            border: 1px solid rgba(0,240,255,0.25);
        }
        .btn-cta {
            background: var(--gradient-neon);
            color: #fff;
            padding: 0.8rem 2rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: var(--shadow-neon);
            display: inline-block;
        }
        .btn-cta:hover {
            background: var(--gradient-hot);
            box-shadow: 0 0 25px rgba(255,0,127,0.5);
            color: #fff;
            transform: translateY(-2px);
        }

        /* FOOTER */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--card-border);
            padding: 3rem 0 1.5rem;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-hero h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-col h6 {
            color: var(--text-primary);
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul li a {
            color: var(--text-muted);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            margin-top: 2rem;
            padding-top: 1.5rem;
            text-align: left;
            font-size: 0.85rem;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 5rem;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50px;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            box-shadow: 0 0 15px rgba(0,240,255,0.5);
            transition: var(--transition-smooth);
            animation: pulse-neon 2s infinite;
        }
        .fab-left::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50px;
            padding: 2px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            z-index: -1;
        }
        @keyframes pulse-neon {
            0%, 100% { box-shadow: 0 0 15px rgba(0,240,255,0.5); }
            50% { box-shadow: 0 0 25px rgba(0,240,255,0.8); }
        }
        .fab-left:hover {
            background: rgba(0,240,255,0.2);
            transform: scale(1.1);
        }

/* roulang page: category3 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --accent-yellow: #FFD700;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --card-bg: rgba(13, 17, 30, 0.85);
            --card-border: rgba(0, 82, 255, 0.3);
            --card-hover-border: #0052FF;
            --gradient-neon: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-hot: linear-gradient(135deg, #FF007F 0%, #FFD700 100%);
            --shadow-neon: 0 0 20px rgba(0, 82, 255, 0.4);
            --shadow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --font-body: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
        }

        body {
            background-color: var(--primary-bg);
            color: var(--text-primary);
            font-family: var(--font-body);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding-top: 76px;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button,
        .btn {
            cursor: pointer;
            font-family: var(--font-body);
            border: none;
            outline: none;
            transition: var(--transition-smooth);
        }

        button:focus-visible,
        .btn:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* NAVIGATION */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            transition: var(--transition-smooth);
            padding: 0.6rem 0;
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--gradient-neon);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            box-shadow: var(--shadow-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li a {
            display: block;
            padding: 0.5rem 1rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
        }

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

        .nav-menu li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-cyan);
        }

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

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
        }

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

        .btn-signup {
            background: var(--gradient-neon);
            color: #fff;
            padding: 0.5rem 1.6rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: var(--shadow-neon);
            white-space: nowrap;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 82, 255, 0.6);
            color: #fff;
        }

        /* Mobile Nav */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.8rem;
            cursor: pointer;
        }

        @media (max-width: 1024px) {
            .mobile-toggle {
                display: block;
            }

            .nav-menu {
                position: fixed;
                top: 76px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(22px);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 1rem 0;
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.3s ease, opacity 0.3s ease;
                border-bottom: 2px solid var(--accent-blue);
                z-index: 999;
            }

            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
            }

            .nav-menu li a {
                padding: 0.9rem 2rem;
                font-size: 1rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }

            .header-actions {
                gap: 0.5rem;
            }

            .btn-login,
            .btn-signup {
                padding: 0.45rem 1rem;
                font-size: 0.85rem;
            }
        }

        /* PAGE HERO */
        .page-hero {
            padding: 4rem 0 3rem;
            text-align: left;
            background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
        }

        .page-hero h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
            background: var(--gradient-neon);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.25;
        }

        .page-hero .subtitle {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 700px;
            margin-bottom: 1.5rem;
        }

        .badge-trust {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.4);
            color: var(--accent-cyan);
            padding: 0.5rem 1.2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 1.2rem;
        }

        @media (max-width: 768px) {
            .page-hero h1 {
                font-size: 2rem;
            }
        }

        /* SECTION */
        .section {
            padding: 4rem 0;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
            text-align: left;
        }

        .section-desc {
            color: var(--text-muted);
            font-size: 1.05rem;
            margin-bottom: 2.5rem;
            text-align: left;
            max-width: 800px;
        }

        /* GLASS CARDS */
        .glass-card {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: var(--transition-smooth);
            height: 100%;
        }

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

        /* PAYMENT METHODS */
        .payment-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .payment-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: var(--transition-smooth);
        }

        .payment-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan);
            transform: translateY(-6px);
        }

        .payment-icon {
            font-size: 2.5rem;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }

        .payment-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .payment-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
        }

        @media (max-width: 992px) {
            .payment-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

        /* PROCESS STEPS */
        .step-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }

        .step-item {
            display: flex;
            gap: 1.5rem;
            align-items: flex-start;
        }

        .step-number {
            flex-shrink: 0;
            width: 50px;
            height: 50px;
            background: var(--gradient-neon);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.3rem;
            color: #fff;
            box-shadow: var(--shadow-neon);
        }

        .step-content h4 {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.4rem;
        }

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

        /* TIPS GRID */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .tip-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
        }

        .tip-card i {
            font-size: 1.8rem;
            color: var(--accent-yellow);
            margin-bottom: 1rem;
        }

        .tip-card h4 {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
        }

        .tip-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin: 0;
        }

        @media (max-width: 992px) {
            .tips-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

        /* FAQ */
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            overflow: hidden;
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            color: var(--text-primary);
            padding: 1.2rem 1.5rem;
            text-align: left;
            font-weight: 700;
            font-size: 1.05rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }

        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-muted);
            display: none;
            font-size: 0.95rem;
        }

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

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

        /* CTA */
        .cta-block {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15) 0%, rgba(0, 240, 255, 0.08) 100%);
            border: 1px solid var(--accent-blue);
            border-radius: var(--radius-xl);
            padding: 3rem 2rem;
            text-align: center;
        }

        .btn-cta {
            background: var(--gradient-hot);
            color: #fff;
            font-weight: 800;
            padding: 0.9rem 2.8rem;
            border-radius: 50px;
            font-size: 1.1rem;
            box-shadow: 0 0 24px rgba(255, 0, 127, 0.4);
            display: inline-block;
            margin-top: 1.2rem;
        }

        .btn-cta:hover {
            transform: scale(1.05);
            box-shadow: 0 0 36px rgba(255, 0, 127, 0.7);
            color: #fff;
        }

        /* FOOTER */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(0, 82, 255, 0.3);
            padding: 3.5rem 0 1.8rem;
            margin-top: 2rem;
            color: var(--text-secondary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-bottom: 2.5rem;
        }

        .footer-col h6 {
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
            font-size: 0.95rem;
        }

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

        .footer-col ul li {
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

        @media (max-width: 768px) {
            .step-item {
                flex-direction: column;
                gap: 0.8rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --accent-yellow: #FFD700;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --card-bg: rgba(13, 17, 30, 0.85);
            --card-border: rgba(0, 82, 255, 0.3);
            --card-hover-border: #0052FF;
            --gradient-neon: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-hot: linear-gradient(135deg, #FF007F 0%, #FFD700 100%);
            --shadow-neon: 0 0 20px rgba(0, 82, 255, 0.4);
            --shadow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --font-body: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
        }

        body {
            background-color: var(--primary-bg);
            color: var(--text-primary);
            font-family: var(--font-body);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: 72px;
        }

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

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

        button,
        .btn {
            cursor: pointer;
            font-family: var(--font-body);
            border: none;
            outline: none;
            transition: var(--transition-smooth);
        }

        button:focus-visible,
        .btn:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* NAVIGATION */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            transition: var(--transition-smooth);
            padding: 0.6rem 0;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--gradient-neon);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            box-shadow: var(--shadow-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li a {
            display: block;
            padding: 0.5rem 1rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
        }

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

        .nav-menu li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-cyan);
        }

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

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
        }

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

        .btn-signup {
            background: var(--gradient-neon);
            color: #fff;
            padding: 0.5rem 1.6rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: var(--shadow-neon);
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
            transform: translateY(-1px);
        }

        /* Mobile Nav Toggle */
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.4rem;
        }

        /* HERO */
        .hero-section {
            padding: 3rem 0 2rem;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.08) 0%, transparent 100%);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
        }

        .hero-content h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 900;
            background: var(--gradient-neon);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 1rem;
        }

        .hero-content .lead {
            font-size: 1.2rem;
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .badge-neon {
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.3);
            padding: 0.4rem 1rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .badge-neon i {
            font-size: 0.8rem;
        }

        .btn-cta {
            background: var(--gradient-hot);
            color: #fff;
            padding: 0.85rem 2.4rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 0 25px rgba(255, 0, 127, 0.5);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-cta:hover {
            box-shadow: 0 0 40px rgba(255, 0, 127, 0.8);
            transform: translateY(-2px);
            color: #fff;
        }

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

        .hero-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 2px solid var(--card-border);
            box-shadow: var(--shadow-neon);
            max-width: 480px;
        }

        .hero-img-wrap img {
            width: 100%;
            object-fit: cover;
        }

        /* PROGRESS TRACKER */
        .progress-tracker {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem 2rem;
            backdrop-filter: blur(12px);
            margin-top: 2rem;
        }

        .progress-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .progress-title {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-primary);
        }

        .progress-percent {
            font-weight: 900;
            font-size: 1.6rem;
            color: var(--accent-cyan);
        }

        .progress {
            height: 12px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50px;
            overflow: hidden;
            margin-bottom: 1.2rem;
        }

        .progress-bar {
            background: var(--gradient-neon);
            border-radius: 50px;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: width 1.5s ease;
        }

        .progress-tiers {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            justify-content: space-between;
        }

        .tier-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-sm);
            padding: 0.6rem 0.9rem;
            text-align: center;
            flex: 1;
            min-width: 100px;
        }

        .tier-item strong {
            display: block;
            color: var(--accent-yellow);
            font-size: 1rem;
        }

        .tier-item span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* SECTION STYLES */
        .section-padding {
            padding: 4rem 0;
        }

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

        .section-header h2 {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0.6rem;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 700px;
        }

        /* FEATURE GRID */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.8rem;
        }

        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            backdrop-filter: blur(8px);
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--gradient-neon);
            opacity: 0;
            transition: var(--transition-smooth);
        }

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

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

        .feature-icon {
            width: 52px;
            height: 52px;
            background: rgba(0, 82, 255, 0.15);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            margin-bottom: 1.2rem;
        }

        .feature-card h3 {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.6rem;
            color: var(--text-primary);
        }

        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* STEPS TIMELINE */
        .steps-timeline {
            position: relative;
            padding-left: 40px;
        }

        .steps-timeline::before {
            content: '';
            position: absolute;
            left: 18px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: rgba(0, 240, 255, 0.2);
        }

        .step-item {
            position: relative;
            margin-bottom: 2.5rem;
            padding-left: 1.5rem;
        }

        .step-item:last-child {
            margin-bottom: 0;
        }

        .step-marker {
            position: absolute;
            left: -40px;
            top: 0;
            width: 36px;
            height: 36px;
            background: var(--gradient-neon);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 0.9rem;
            color: #fff;
            box-shadow: var(--shadow-neon);
            z-index: 1;
        }

        .step-item h4 {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-primary);
            margin-bottom: 0.4rem;
        }

        .step-item p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* CARDS LIST */
        .card-list-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.5rem;
        }

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

        .card-item:hover {
            border-color: var(--card-hover-border);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.25);
            transform: translateY(-3px);
        }

        .card-item-img {
            height: 160px;
            overflow: hidden;
        }

        .card-item-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .card-item-body {
            padding: 1.2rem;
        }

        .card-item-body h4 {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 0.4rem;
        }

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

        /* FAQ */
        .faq-list {
            max-width: 900px;
        }

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

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

        .faq-question {
            width: 100%;
            background: transparent;
            color: var(--text-primary);
            padding: 1.2rem 1.5rem;
            text-align: left;
            font-weight: 700;
            font-size: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border: none;
            cursor: pointer;
        }

        .faq-question i {
            color: var(--accent-cyan);
            transition: transform 0.3s ease;
        }

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

        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.65;
            display: none;
        }

        .faq-answer.show {
            display: block;
        }

        /* CTA SECTION */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.12) 0%, rgba(0, 240, 255, 0.06) 100%);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            text-align: center;
        }

        .cta-section h2 {
            font-family: var(--font-heading);
            font-size: 2.3rem;
            font-weight: 900;
            margin-bottom: 1rem;
        }

        .cta-section p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 650px;
            margin: 0 auto 2rem;
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1050;
            width: 56px;
            height: 56px;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.45);
            transition: var(--transition-smooth);
            animation: fabFloat 3s ease-in-out infinite;
        }

        .fab-floating::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50px;
            background: linear-gradient(135deg, #0052FF, #00F0FF, #FF007F);
            z-index: -1;
            opacity: 0.8;
        }

        .fab-floating:hover {
            transform: scale(1.12);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.8);
            color: #fff;
        }

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

        /* FOOTER */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(0, 82, 255, 0.3);
            padding: 3rem 0 1.5rem;
            color: var(--text-muted);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-col h6 {
            color: var(--accent-cyan);
            font-weight: 700;
            margin-bottom: 1rem;
            font-size: 0.95rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

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

        .footer-col ul li {
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.85rem;
        }

        /* RESPONSIVE */
        @media (max-width: 992px) {
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .hero-visual {
                margin-top: 2rem;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .nav-menu {
                gap: 0;
            }
            .nav-menu li a {
                padding: 0.4rem 0.7rem;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 768px) {
            body {
                padding-top: 60px;
            }
            .site-header {
                padding: 0.4rem 0;
            }
            .nav-menu {
                display: none;
            }
            .nav-menu.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                padding: 1rem;
                border-bottom: 1px solid var(--card-border);
                gap: 0.3rem;
            }
            .nav-menu.mobile-open li a {
                padding: 0.7rem 1rem;
                font-size: 0.95rem;
                border-radius: var(--radius-sm);
            }
            .nav-toggle {
                display: block;
            }
            .header-actions {
                gap: 0.5rem;
            }
            .btn-login,
            .btn-signup {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
            .hero-content h1 {
                font-size: 1.8rem;
            }
            .hero-content .lead {
                font-size: 1rem;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .section-padding {
                padding: 2.5rem 0;
            }
            .progress-tiers {
                flex-direction: column;
                gap: 0.5rem;
            }
            .tier-item {
                min-width: auto;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.5rem;
            }
            .btn-cta {
                padding: 0.7rem 1.8rem;
                font-size: 0.95rem;
            }
            .btn-signup {
                padding: 0.4rem 0.8rem;
                font-size: 0.8rem;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .card-list-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category4 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --accent-yellow: #FFD700;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --card-bg: rgba(13, 17, 30, 0.85);
            --card-border: rgba(0, 82, 255, 0.3);
            --card-hover-border: #0052FF;
            --gradient-neon: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-hot: linear-gradient(135deg, #FF007F 0%, #FFD700 100%);
            --shadow-neon: 0 0 20px rgba(0, 82, 255, 0.4);
            --shadow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --font-body: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            background-color: var(--primary-bg);
            color: var(--text-primary);
            font-family: var(--font-body);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: 76px;
        }

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

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

        button,
        .btn {
            cursor: pointer;
            font-family: var(--font-body);
            border: none;
            outline: none;
            transition: var(--transition-smooth);
        }

        button:focus-visible,
        .btn:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* NAVIGATION */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            transition: var(--transition-smooth);
            padding: 0.6rem 0;
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--gradient-neon);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            box-shadow: var(--shadow-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li a {
            display: block;
            padding: 0.5rem 1rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
        }

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

        .nav-menu li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-cyan);
        }

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

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
        }

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

        .btn-signup {
            background: var(--gradient-neon);
            color: #fff;
            padding: 0.5rem 1.6rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: var(--shadow-neon);
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.7);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 0.3rem 0.7rem;
            border-radius: var(--radius-sm);
        }

        /* HERO BANNER */
        .hero-section {
            position: relative;
            padding: 3rem 0 4rem;
            background: radial-gradient(ellipse at 30% 20%, rgba(0, 82, 255, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 70%, rgba(255, 0, 127, 0.08) 0%, transparent 60%);
            overflow: hidden;
        }

        .hero-bg-image {
            position: absolute;
            top: 0;
            right: 0;
            width: 45%;
            height: 100%;
            background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            opacity: 0.2;
            mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.7), transparent);
            -webkit-mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.7), transparent);
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 3rem;
            min-height: 450px;
        }

        .hero-text {
            flex: 1;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-cyan);
            padding: 0.4rem 1rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            border: 1px solid rgba(0, 240, 255, 0.3);
            margin-bottom: 1.5rem;
        }

        .hero-text h1 {
            font-size: 2.8rem;
            font-weight: 800;
            font-family: var(--font-heading);
            line-height: 1.2;
            margin-bottom: 1.2rem;
            background: var(--gradient-neon);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-text p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .hero-visual {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .progress-circle-wrap {
            position: relative;
            width: 220px;
            height: 220px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .progress-ring-bg {
            fill: none;
            stroke: rgba(0, 240, 255, 0.1);
            stroke-width: 8;
        }

        .progress-ring-fill {
            fill: none;
            stroke: url(#neonGradient);
            stroke-width: 8;
            stroke-linecap: round;
            transform-origin: center;
            animation: progressPulse 2s ease-in-out infinite;
        }

        @keyframes progressPulse {
            0%,
            100% {
                filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
            }
            50% {
                filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.9));
            }
        }

        .progress-inner {
            position: absolute;
            text-align: center;
        }

        .progress-inner .percent {
            font-size: 3rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1;
        }

        .progress-inner .label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 0.3rem;
        }

        .hero-stats {
            display: flex;
            gap: 2rem;
            margin-top: 1rem;
        }

        .hero-stat-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 1rem 1.5rem;
            text-align: center;
            backdrop-filter: blur(12px);
        }

        .hero-stat-item .stat-num {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent-yellow);
        }

        .hero-stat-item .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .btn-hero-cta {
            display: inline-block;
            background: var(--gradient-hot);
            color: #fff;
            padding: 0.85rem 2.4rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 4px 24px rgba(255, 0, 127, 0.4);
            letter-spacing: 0.3px;
        }

        .btn-hero-cta:hover {
            box-shadow: 0 4px 36px rgba(255, 215, 0, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }

        /* SECTION COMMONS */
        .section-padding {
            padding: 4rem 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            font-family: var(--font-heading);
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            margin-bottom: 3rem;
        }

        /* TIER PREVIEW CARDS */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .tier-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            backdrop-filter: blur(10px);
            position: relative;
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
            text-align: left;
        }

        .tier-card:hover {
            border-color: var(--card-hover-border);
            box-shadow: 0 0 28px rgba(0, 82, 255, 0.25);
            transform: translateY(-4px);
        }

        .tier-card.featured {
            border-color: var(--accent-yellow);
            box-shadow: 0 0 24px rgba(255, 215, 0, 0.2);
        }

        .tier-card .tier-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            padding: 0.25rem 0.8rem;
            border-radius: 15px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 1rem;
            width: fit-content;
        }

        .tier-card .tier-price {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-yellow);
            margin-bottom: 0.25rem;
        }

        .tier-card .tier-unit {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .tier-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin: 1rem 0 0.75rem;
        }

        .tier-card .tier-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 1.5rem;
            flex: 1;
        }

        .tier-card .btn-tier {
            background: transparent;
            border: 1.5px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            width: 100%;
            text-align: center;
        }

        .tier-card .btn-tier:hover {
            background: var(--accent-cyan);
            color: #000;
            box-shadow: var(--shadow-cyan);
        }

        .tier-card.featured .btn-tier {
            background: var(--gradient-hot);
            border: none;
            color: #fff;
        }

        /* USE CASE PANELS */
        .use-case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }

        .use-case-panel {
            background: var(--secondary-bg);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: var(--transition-smooth);
        }

        .use-case-panel:hover {
            border-color: var(--card-border);
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.1);
        }

        .use-case-icon {
            width: 50px;
            height: 50px;
            background: var(--gradient-neon);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 1.2rem;
        }

        .use-case-panel h4 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .use-case-panel p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* SUCCESS STORY CARDS */
        .story-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .story-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            backdrop-filter: blur(10px);
            transition: var(--transition-smooth);
        }

        .story-card:hover {
            border-color: var(--card-hover-border);
            box-shadow: 0 8px 28px rgba(0, 82, 255, 0.3);
            transform: translateY(-3px);
        }

        .story-card .story-img {
            height: 160px;
            background-size: cover;
            background-position: center;
        }

        .story-card .story-body {
            padding: 1.5rem;
        }

        .story-card .story-body h5 {
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 0.5rem;
        }

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

        .story-card .story-meta {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-top: 0.75rem;
            font-size: 0.8rem;
            color: var(--accent-cyan);
            font-weight: 600;
        }

        /* FAQ */
        .faq-list {
            max-width: 850px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            overflow: hidden;
            backdrop-filter: blur(10px);
            transition: var(--transition-fast);
        }

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

        .faq-question {
            width: 100%;
            background: transparent;
            color: var(--text-primary);
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border: none;
            text-align: left;
        }

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

        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

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

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

        /* CTA BANNER */
        .cta-banner {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15) 0%, rgba(0, 240, 255, 0.08) 100%);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-xl);
            padding: 3.5rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.05) 0%, transparent 70%);
            animation: rotateGlow 12s linear infinite;
        }

        @keyframes rotateGlow {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }

        .cta-banner h3 {
            font-size: 1.8rem;
            font-weight: 700;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            color: var(--text-secondary);
            position: relative;
            z-index: 1;
            margin-bottom: 1.5rem;
        }

        .btn-cta-lg {
            display: inline-block;
            background: var(--gradient-neon);
            color: #fff;
            padding: 0.9rem 3rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: var(--shadow-neon);
            position: relative;
            z-index: 1;
        }

        .btn-cta-lg:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.7);
            transform: translateY(-2px);
            color: #fff;
        }

        /* FOOTER */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(0, 82, 255, 0.2);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }

        .footer-col h6 {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

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

        .footer-col ul li {
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

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

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 2rem;
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-container {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1050;
        }

        .fab-btn {
            width: 56px;
            height: 56px;
            border-radius: 28px;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-clip: padding-box;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            transition: var(--transition-smooth);
            animation: fabBreath 2.5s ease-in-out infinite;
        }

        .fab-btn::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 30px;
            padding: 2px;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask-composite: exclude;
            -webkit-mask-composite: xor;
        }

        @keyframes fabBreath {
            0%,
            100% {
                box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            }
            50% {
                box-shadow: 0 0 32px rgba(0, 240, 255, 0.85);
            }
        }

        .fab-btn:hover {
            transform: scale(1.12);
            color: #fff;
            box-shadow: 0 0 36px rgba(0, 240, 255, 0.9);
        }

        .fab-notification {
            position: absolute;
            top: 6px;
            right: 6px;
            width: 10px;
            height: 10px;
            background: var(--accent-pink);
            border-radius: 50%;
            animation: blink 1.2s infinite;
        }

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

        /* RESPONSIVE */
        @media (max-width: 1024px) {
            .hero-content {
                flex-direction: column;
                text-align: center;
                gap: 2rem;
            }
            .hero-text h1 {
                font-size: 2.2rem;
            }
            .hero-bg-image {
                width: 100%;
                opacity: 0.1;
            }
            .tier-grid,
            .story-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .use-case-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.97);
                flex-direction: column;
                padding: 1rem;
                border-bottom: 1px solid var(--card-border);
                backdrop-filter: blur(18px);
            }
            .nav-menu.open {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .header-actions {
                gap: 0.5rem;
            }
            .btn-login,
            .btn-signup {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
            .hero-text h1 {
                font-size: 1.8rem;
            }
            .tier-grid,
            .story-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .progress-circle-wrap {
                width: 160px;
                height: 160px;
            }
            .progress-inner .percent {
                font-size: 2.2rem;
            }
            .hero-stats {
                flex-wrap: wrap;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 1.5rem;
            }
            .btn-hero-cta {
                width: 100%;
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .cta-banner h3 {
                font-size: 1.4rem;
            }
        }