/* roulang page: index */
:root {
            --deep-jungle: #0B3C25;
            --forest-green: #062315;
            --sunny-yellow: #FFCC00;
            --lime-green: #32CD32;
            --warm-white: #FFFDF0;
            --light-green: #C5E2D2;
            --gold-coin: #E8B730;
            --soft-gold-glow: rgba(255, 204, 0, 0.3);
            --card-bg: rgba(11, 60, 37, 0.8);
            --border-radius-sm: 12px;
            --border-radius-lg: 24px;
            --shadow-card: 0 8px 20px rgba(0,0,0,0.25);
            --transition-base: all 0.3s ease;
            --font-heading: 'Segoe UI', 'Tahoma', 'Geneva', 'Verdana', sans-serif;
            --font-body: 'Segoe UI', 'Tahoma', 'Geneva', 'Verdana', sans-serif;
        }

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

        body {
            font-family: var(--font-body);
            background-color: var(--forest-green);
            color: var(--warm-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            transition: var(--transition-base);
            color: var(--sunny-yellow);
        }

        a:hover {
            color: var(--lime-green);
        }

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

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

        /* Navigation */
        .navbar-custom {
            background: rgba(6, 35, 21, 0.95);
            backdrop-filter: blur(15px);
            padding: 15px 0;
            border-bottom: 2px solid var(--gold-coin);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: 0 4px 15px rgba(0,0,0,0.3);
        }

        .navbar-custom .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--sunny-yellow) !important;
            letter-spacing: 0.5px;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .navbar-custom .navbar-brand i {
            color: var(--lime-green);
            font-size: 1.8rem;
        }

        .navbar-custom .nav-link {
            color: var(--light-green) !important;
            font-weight: 600;
            margin: 0 8px;
            padding: 8px 16px !important;
            border-radius: 30px;
            transition: var(--transition-base);
        }

        .navbar-custom .nav-link:hover, .navbar-custom .nav-link.active {
            background: rgba(255, 204, 0, 0.15);
            color: var(--sunny-yellow) !important;
            transform: translateY(-2px);
        }

        .navbar-custom .btn-login {
            background: transparent;
            border: 2px solid var(--sunny-yellow);
            color: var(--sunny-yellow);
            border-radius: 30px;
            padding: 8px 20px;
            font-weight: 700;
            margin-right: 10px;
            transition: var(--transition-base);
        }

        .navbar-custom .btn-login:hover {
            background: var(--sunny-yellow);
            color: var(--forest-green);
        }

        .navbar-custom .btn-signup {
            background: var(--sunny-yellow);
            border: none;
            color: var(--forest-green);
            border-radius: 30px;
            padding: 8px 24px;
            font-weight: 700;
            box-shadow: 0 4px 12px var(--soft-gold-glow);
            transition: var(--transition-base);
        }

        .navbar-custom .btn-signup:hover {
            background: var(--lime-green);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(50, 205, 50, 0.4);
        }

        .navbar-toggler {
            border: 2px solid var(--sunny-yellow);
            color: var(--sunny-yellow);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 204, 0, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Hero */
        .hero-section {
            background: linear-gradient(135deg, var(--deep-jungle) 0%, var(--forest-green) 100%);
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0 100px;
            position: relative;
            overflow: hidden;
            text-align: center;
            border-bottom: 4px solid var(--sunny-yellow);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(circle at center, rgba(255,204,0,0.15) 0%, rgba(0,0,0,0.6) 100%);
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-icon-grid {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }

        .hero-icon-item {
            text-align: center;
            color: var(--sunny-yellow);
        }

        .hero-icon-item i {
            font-size: 3rem;
            margin-bottom: 8px;
            display: block;
            filter: drop-shadow(0 0 10px rgba(255,204,0,0.5));
        }

        .hero-icon-item span {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--light-green);
        }

        .hero-section h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--warm-white);
            text-shadow: 2px 2px 8px rgba(0,0,0,0.7);
            margin-bottom: 20px;
        }

        .hero-section .lead {
            font-size: 1.2rem;
            color: var(--light-green);
            margin-bottom: 30px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary-custom {
            background: var(--sunny-yellow);
            border: none;
            color: var(--forest-green);
            font-weight: 700;
            padding: 14px 32px;
            border-radius: 40px;
            font-size: 1.1rem;
            box-shadow: 0 6px 20px var(--soft-gold-glow);
            transition: var(--transition-base);
        }

        .btn-primary-custom:hover {
            background: var(--lime-green);
            transform: scale(1.05);
            color: var(--forest-green);
        }

        .btn-outline-custom {
            border: 2px solid var(--sunny-yellow);
            color: var(--sunny-yellow);
            background: transparent;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: 40px;
            font-size: 1.1rem;
            transition: var(--transition-base);
        }

        .btn-outline-custom:hover {
            background: var(--sunny-yellow);
            color: var(--forest-green);
        }

        /* Entry Matrix */
        .section-entry {
            background: var(--deep-jungle);
            padding: 70px 0;
        }

        .entry-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
        }

        .entry-card {
            background: rgba(11, 60, 37, 0.9);
            border: 1px solid var(--gold-coin);
            border-radius: var(--border-radius-sm);
            padding: 30px;
            text-align: left;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .entry-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(232, 183, 48, 0.3);
            border-color: var(--sunny-yellow);
        }

        .entry-card i {
            font-size: 2.5rem;
            color: var(--sunny-yellow);
            margin-bottom: 15px;
        }

        .entry-card h3 {
            font-size: 1.4rem;
            margin-bottom: 10px;
            color: var(--warm-white);
        }

        /* Milestone Timeline */
        .section-milestone {
            background: var(--forest-green);
            padding: 70px 0;
            position: relative;
        }

        .milestone-title {
            color: var(--sunny-yellow);
            text-align: center;
            margin-bottom: 50px;
        }

        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline::after {
            content: '';
            position: absolute;
            width: 4px;
            background: var(--sunny-yellow);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -2px;
        }

        .timeline-item {
            padding: 20px 40px;
            position: relative;
            width: 50%;
        }

        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
        }

        .timeline-content {
            background: var(--deep-jungle);
            padding: 20px;
            border-radius: var(--border-radius-sm);
            border-left: 4px solid var(--sunny-yellow);
        }

        /* News Section */
        .section-news {
            background: var(--deep-jungle);
            padding: 70px 0;
        }

        .news-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .news-main-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .news-item {
            background: rgba(255,255,255,0.05);
            padding: 15px 20px;
            border-radius: var(--border-radius-sm);
            border-left: 3px solid var(--lime-green);
            transition: var(--transition-base);
        }

        .news-item:hover {
            background: rgba(255,204,0,0.1);
            transform: translateX(5px);
        }

        .news-item a {
            font-weight: 600;
            font-size: 1.1rem;
        }

        .news-item small {
            color: var(--light-green);
            display: block;
            margin-top: 5px;
        }

        .news-recommend {
            background: var(--card-bg);
            padding: 25px;
            border-radius: var(--border-radius-lg);
            border: 1px solid var(--gold-coin);
        }

        /* Platform Security */
        .section-security {
            background: var(--forest-green);
            padding: 70px 0;
            background-image: url('/assets/images/backpic/back-3.jpg');
            background-size: cover;
            background-blend-mode: overlay;
            background-attachment: fixed;
        }

        .security-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            text-align: center;
        }

        .security-item i {
            font-size: 3rem;
            color: var(--lime-green);
            margin-bottom: 15px;
        }

        /* App Download */
        .section-app {
            background: var(--deep-jungle);
            padding: 70px 0;
        }

        .app-buttons img {
            height: 50px;
            margin: 10px;
        }

        /* Footer */
        .footer-custom {
            background: #041a0e;
            color: var(--light-green);
            padding: 50px 0 30px;
            border-top: 3px solid var(--sunny-yellow);
        }

        .footer-custom a {
            color: var(--sunny-yellow);
        }

        /* FAB Option 1 */
        .fab-custom {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 999;
            width: 60px;
            height: 60px;
            background: var(--forest-green);
            border: 3px solid var(--sunny-yellow);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--sunny-yellow);
            font-size: 1.8rem;
            box-shadow: 0 4px 20px var(--soft-gold-glow);
            animation: float 3s infinite ease-in-out;
            cursor: pointer;
            transition: var(--transition-base);
            opacity: 0.8;
        }

        .fab-custom:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 6px 25px rgba(255,204,0,0.6);
        }

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

        /* Responsive */
        @media (max-width: 768px) {
            .hero-section h1 { font-size: 2.2rem; }
            .news-list { grid-template-columns: 1fr; }
            .timeline::after { left: 20px; }
            .timeline-item { width: 100%; padding-left: 60px; text-align: left; left: 0 !important; }
            .timeline-item:nth-child(even) { left: 0; }
            .navbar-custom .btn-login, .navbar-custom .btn-signup { display: inline-block; margin: 5px; }
        }

/* roulang page: article */
:root {
            --bg-deep: #0B1A30;
            --bg-card: #0F1D33;
            --bg-primary: #141E33;
            --accent-cyan: #00F0FF;
            --accent-lime: #CCFF00;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #7A828A;
            --border-neon: rgba(0, 240, 255, 0.4);
            --border-subtle: rgba(255, 255, 255, 0.1);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 12px rgba(204, 255, 0, 0.3);
            --gradient-neon: linear-gradient(135deg, #00F0FF 0%, #CCFF00 100%);
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --font-sans: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition-base: all 0.25s ease;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-white);
            margin: 0;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(circle at 20% 10%, rgba(0, 240, 255, 0.08) 0%, transparent 35%);
        }

        .container-custom {
            width: 100%;
            max-width: 1260px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ----- NAVIGATION ----- */
        .navbar-custom {
            background: rgba(11, 26, 48, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-subtle);
            padding: 12px 0;
            transition: var(--transition-base);
        }

        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--accent-cyan) !important;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
        }

        .navbar-brand i {
            font-size: 1.8rem;
            color: var(--accent-lime);
            filter: drop-shadow(0 0 6px rgba(204, 255, 0, 0.6));
        }

        .navbar-brand:hover {
            color: var(--accent-lime) !important;
            text-shadow: 0 0 8px rgba(204, 255, 0, 0.5);
        }

        .navbar-nav .nav-link {
            color: var(--text-silver) !important;
            font-weight: 500;
            margin: 0 6px;
            padding: 8px 14px !important;
            border-radius: 30px;
            transition: var(--transition-base);
            position: relative;
        }

        .navbar-nav .nav-link.active,
        .navbar-nav .nav-link:hover {
            color: var(--text-white) !important;
            background: rgba(0, 240, 255, 0.12);
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            border-radius: 30px;
            padding: 8px 22px;
            margin-left: 10px;
            transition: var(--transition-base);
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            border-color: var(--accent-lime);
            color: var(--accent-lime);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
        }

        .btn-signup {
            background: var(--accent-cyan);
            border: none;
            color: #0B1A30;
            font-weight: 700;
            border-radius: 30px;
            padding: 8px 24px;
            margin-left: 10px;
            background: var(--gradient-neon);
            box-shadow: 0 4px 15px rgba(0, 240, 255, 0.35);
            transition: var(--transition-base);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(204, 255, 0, 0.45);
            color: #0B1A30;
        }

        /* Mobile Nav */
        .navbar-toggler {
            border: 1px solid var(--accent-cyan);
            box-shadow: none;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0, 240, 255, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ----- ARTICLE HERO / BANNER ----- */
        .article-hero {
            background: linear-gradient(0deg, rgba(11, 26, 48, 0.9) 10%, rgba(15, 29, 51, 0.6) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 70px 0 50px;
            border-bottom: 1px solid var(--border-neon);
            position: relative;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--gradient-neon);
            opacity: 0.7;
        }

        .breadcrumb-custom {
            background: transparent;
            padding: 0;
            margin-bottom: 15px;
        }
        .breadcrumb-custom .breadcrumb-item a {
            color: var(--accent-cyan);
            text-decoration: none;
        }
        .breadcrumb-custom .breadcrumb-item.active {
            color: var(--text-silver);
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-silver);
            font-size: 0.95rem;
            margin-top: 15px;
        }

        /* ----- MAIN CONTENT LAYOUT ----- */
        .content-wrapper {
            background: var(--bg-primary);
            border-radius: var(--radius-lg);
            padding: 35px 30px;
            margin-top: -40px;
            position: relative;
            z-index: 5;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
            border: 1px solid var(--border-subtle);
        }

        .article-body {
            color: var(--text-silver);
            font-size: 1.05rem;
            line-height: 1.7;
            word-wrap: break-word;
        }

        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-white);
            margin-top: 2rem;
            margin-bottom: 1rem;
            border-left: 5px solid var(--accent-cyan);
            padding-left: 18px;
        }

        .article-body h3 {
            font-weight: 600;
            color: var(--accent-lime);
            margin-top: 1.8rem;
        }

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

        .article-body ul, .article-body ol {
            padding-left: 1.5rem;
            margin-bottom: 1.5rem;
        }

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

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

        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            border: 1px solid var(--border-subtle);
        }

        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 25px;
            margin-bottom: 30px;
            transition: var(--transition-base);
        }

        .sidebar-card:hover {
            border-color: var(--border-neon);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.2);
        }

        .sidebar-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .list-software-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px dashed rgba(255,255,255,0.08);
            color: var(--text-silver);
            transition: var(--transition-base);
        }

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

        .list-software-item:hover {
            color: var(--text-white);
            transform: translateX(5px);
        }

        .rank-badge {
            background: var(--gradient-neon);
            color: #0B1A30;
            font-weight: 800;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
        }

        .cta-box {
            background: linear-gradient(145deg, #132D4A, #0A1A2F);
            border: 1px solid var(--accent-cyan);
            border-radius: var(--radius-md);
            padding: 30px;
            text-align: left;
        }

        .btn-neon {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 700;
            padding: 12px 28px;
            border-radius: 40px;
            transition: var(--transition-base);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .btn-neon:hover {
            background: var(--accent-cyan);
            color: #0B1A30;
            box-shadow: var(--shadow-neon);
        }

        /* ----- FAB (Floating Action Button) ----- */
        .fab-custom {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            background: rgba(11, 26, 48, 0.75);
            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: 1.6rem;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            transition: 0.3s ease;
            cursor: pointer;
            border-image: linear-gradient(135deg, #00F0FF, #CCFF00) 1;
        }

        .fab-custom:hover {
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(204, 255, 0, 0.7);
            color: var(--accent-lime);
        }

        /* ----- FOOTER ----- */
        .footer-custom {
            background: #060E1A;
            border-top: 1px solid var(--border-neon);
            padding: 50px 0 25px;
            margin-top: 60px;
            color: var(--text-silver);
        }

        .footer-custom h5 {
            color: var(--accent-lime);
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-custom a {
            color: var(--text-silver);
            text-decoration: none;
            transition: var(--transition-base);
        }

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

        @media (max-width: 768px) {
            .content-wrapper {
                padding: 20px 15px;
                margin-top: -30px;
            }
            .article-hero {
                padding: 50px 0 40px;
            }
            .navbar-nav {
                background: rgba(11, 26, 48, 0.95);
                border-radius: 16px;
                padding: 15px;
                margin-top: 10px;
            }
            .btn-login, .btn-signup {
                margin: 5px 0;
                display: block;
                width: 100%;
                text-align: center;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep-green: #0A2E1C;
            --bg-forest: #123E25;
            --gold: #FFD700;
            --gold-dark: #B8941F;
            --lucky-red: #D32F2F;
            --text-white: #FFFFFF;
            --text-pale-mint: #D1F2EB;
            --border-gold: rgba(255, 215, 0, 0.4);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background-color: var(--bg-deep-green);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--gold);
        }

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

        a:hover {
            color: #FFF;
            text-decoration: underline;
        }

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

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

        /* ---------- NAVIGATION ---------- */
        .navbar-custom {
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-gold);
            padding: 12px 0;
            box-shadow: 0 2px 15px rgba(0,0,0,0.7);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--gold) !important;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .navbar-brand i {
            font-size: 1.8rem;
            color: var(--lucky-red);
        }

        .navbar-custom .nav-link {
            color: var(--text-pale-mint) !important;
            font-weight: 600;
            margin: 0 8px;
            position: relative;
            padding: 6px 12px;
            border-radius: 6px;
        }

        .navbar-custom .nav-link.active {
            color: var(--gold) !important;
            background: rgba(255,215,0,0.1);
        }

        .navbar-custom .nav-link:hover {
            color: #FFF !important;
            background: rgba(255,255,255,0.08);
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--gold);
            color: var(--gold);
            font-weight: 700;
            border-radius: 30px;
            padding: 8px 22px;
            margin-left: 10px;
            transition: var(--transition-base);
        }

        .btn-signup {
            background: var(--lucky-red);
            border: none;
            color: #FFF;
            font-weight: 700;
            border-radius: 30px;
            padding: 8px 22px;
            margin-left: 10px;
            box-shadow: 0 4px 12px rgba(211,47,47,0.5);
            transition: var(--transition-base);
        }

        .btn-login:hover {
            background: var(--gold);
            color: #0A2E1C;
        }

        .btn-signup:hover {
            background: #B71C1C;
            transform: translateY(-2px);
            box-shadow: 0 8px 18px rgba(211,47,47,0.7);
        }

        /* ---------- HERO ---------- */
        .hero-category {
            background: linear-gradient(135deg, #0B361D 0%, #062012 100%);
            padding: 70px 0 50px;
            border-bottom: 2px solid var(--gold);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-category h1 {
            font-size: 2.8rem;
            text-shadow: 0 2px 15px rgba(0,0,0,0.7);
            margin-bottom: 15px;
        }

        .hero-badge {
            background: var(--lucky-red);
            color: #FFF;
            font-weight: 700;
            padding: 6px 18px;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 20px;
            font-size: 0.9rem;
            letter-spacing: 1px;
        }

        .group-buy-cta {
            background: rgba(0,0,0,0.45);
            backdrop-filter: blur(10px);
            border: 1px solid var(--gold-dark);
            border-radius: var(--radius-lg);
            padding: 30px 30px 25px;
            margin-top: 30px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .count-users {
            font-size: 2rem;
            font-weight: 800;
            color: var(--gold);
        }

        .btn-start-group {
            background: var(--gold);
            color: #0A2E1C;
            font-weight: 800;
            padding: 14px 35px;
            border-radius: 40px;
            margin: 10px 8px;
            box-shadow: var(--shadow-gold);
            border: none;
            transition: var(--transition-base);
            text-transform: uppercase;
        }

        .btn-join-group {
            background: transparent;
            border: 2px solid var(--gold);
            color: var(--gold);
            font-weight: 800;
            padding: 14px 35px;
            border-radius: 40px;
            margin: 10px 8px;
            transition: var(--transition-base);
            text-transform: uppercase;
        }

        .btn-start-group:hover {
            background: #FFC107;
            transform: scale(1.04);
        }

        .btn-join-group:hover {
            background: rgba(255,215,0,0.15);
            border-color: #FFF;
            color: #FFF;
        }

        /* ---------- SECTION COMMON ---------- */
        .section-padding {
            padding: 65px 0;
        }

        .section-title {
            font-size: 2.1rem;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 70px;
            height: 3px;
            background: var(--lucky-red);
            border-radius: 2px;
        }

        .divider-gold {
            height: 1px;
            background: linear-gradient(to right, transparent, var(--gold), transparent);
            margin: 30px 0;
        }

        /* ---------- FEATURE CARDS ---------- */
        .feature-card {
            background: #0F3522;
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-md);
            padding: 25px;
            transition: var(--transition-base);
            height: 100%;
        }

        .feature-card:hover {
            transform: translateY(-5px);
            border-color: var(--gold);
            box-shadow: 0 12px 28px rgba(0,0,0,0.5);
        }

        .icon-gold {
            font-size: 2.4rem;
            color: var(--gold);
            margin-bottom: 20px;
        }

        /* ---------- STATS PANEL ---------- */
        .stats-banner {
            background: #0F2E1B;
            border-radius: var(--radius-lg);
            padding: 30px 20px;
            border: 1px solid var(--gold-dark);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--gold);
            line-height: 1.2;
        }

        /* ---------- TOOL TABLE / LIST ---------- */
        .tool-row {
            background: #103D26;
            border-left: 4px solid var(--gold);
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 20px;
            transition: var(--transition-base);
        }

        .tool-row:hover {
            background: #184F33;
            border-left-color: var(--lucky-red);
        }

        .tool-rank {
            font-size: 2rem;
            font-weight: 900;
            color: var(--gold-dark);
        }

        /* ---------- FAQ ACCORDION ---------- */
        .accordion-button {
            background: #0F3522 !important;
            color: var(--text-pale-mint) !important;
            font-weight: 700;
            border: 1px solid var(--border-gold) !important;
        }

        .accordion-button:not(.collapsed) {
            background: #1A4A30 !important;
            color: var(--gold) !important;
            box-shadow: none;
        }

        .accordion-item {
            background: transparent;
            border: none;
            margin-bottom: 10px;
        }

        .accordion-body {
            background: #0A2E1C;
            color: var(--text-pale-mint);
            border: 1px solid var(--border-gold);
            border-top: none;
            border-radius: 0 0 8px 8px;
        }

        /* ---------- FOOTER ---------- */
        .footer-custom {
            background: #051F10;
            padding: 45px 0 20px;
            border-top: 2px solid var(--gold);
            color: var(--text-pale-mint);
        }

        .footer-custom a {
            color: var(--text-pale-mint);
        }

        .footer-custom a:hover {
            color: var(--gold);
        }

        /* ---------- FAB ---------- */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 95px;
            z-index: 999;
            width: 56px;
            height: 56px;
            background: #0A2E1C;
            border: 2px solid var(--gold);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 1.8rem;
            box-shadow: 0 4px 20px rgba(255,215,0,0.3);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .fab-left:hover {
            transform: scale(1.1);
            background: #1A4A30;
            box-shadow: 0 0 25px rgba(255,215,0,0.5);
        }

        /* RESPONSIVE */
        @media (max-width: 768px) {
            .hero-category h1 {
                font-size: 2rem;
            }
            .btn-start-group, .btn-join-group {
                display: block;
                width: 100%;
                margin: 8px 0;
            }
            .navbar-brand {
                font-size: 1.2rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary-bg: #121212;
            --secondary-bg: #1C1C1E;
            --card-bg: #242426;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --text-white: #F5F5F7;
            --text-muted: #A8A29E;
            --border-color: #3A3A3C;
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 12px 36px rgba(197, 160, 89, 0.15);
            --transition-base: 0.25s ease;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            background-color: var(--primary-bg);
            color: var(--text-white);
            font-family: var(--font-body);
            line-height: 1.65;
            overflow-x: hidden;
        }
        a { text-decoration: none; color: inherit; }
        img { max-width: 100%; height: auto; display: block; }

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

        /* Navbar */
        .navbar-custom {
            background-color: rgba(18, 18, 18, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            padding-top: 10px;
            padding-bottom: 10px;
        }
        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--accent-gold) !important;
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.3px;
        }
        .navbar-brand i {
            color: var(--accent-amber);
            font-size: 1.5rem;
        }
        .navbar-custom .nav-link {
            color: var(--text-muted) !important;
            font-weight: 500;
            padding: 8px 16px !important;
            transition: color var(--transition-base);
            font-size: 0.95rem;
        }
        .navbar-custom .nav-link.active,
        .navbar-custom .nav-link:hover {
            color: var(--accent-gold) !important;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-gold);
            color: var(--accent-gold);
            padding: 8px 22px;
            border-radius: 24px;
            font-weight: 600;
            transition: all var(--transition-base);
            font-size: 0.9rem;
        }
        .btn-login:hover {
            background: rgba(197, 160, 89, 0.1);
            border-color: var(--accent-amber);
            color: var(--accent-amber);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border: none;
            color: var(--primary-bg);
            padding: 9px 26px;
            border-radius: 24px;
            font-weight: 700;
            transition: all var(--transition-base);
            font-size: 0.9rem;
            box-shadow: 0 4px 16px rgba(197, 160, 89, 0.3);
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(197, 160, 89, 0.5);
            color: var(--primary-bg);
        }
        .navbar-toggler {
            border-color: var(--accent-gold);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(197, 160, 89, 0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @media (max-width: 991px) {
            .navbar-custom .btn-login,
            .navbar-custom .btn-signup {
                display: inline-block !important;
                margin: 6px 4px;
            }
        }

        /* Hero */
        .hero-section {
            position: relative;
            background: linear-gradient(135deg, rgba(28,28,30,0.95), rgba(18,18,18,0.98)), url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            padding: 70px 0 60px;
            border-bottom: 1px solid var(--border-color);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(197, 160, 89, 0.12);
            border: 1px solid rgba(197, 160, 89, 0.3);
            color: var(--accent-gold);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .hero-title {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 2.6rem;
            line-height: 1.25;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 28px;
            max-width: 620px;
        }
        .hero-checklist {
            list-style: none;
            padding: 0;
            margin-bottom: 32px;
        }
        .hero-checklist li {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            font-size: 0.95rem;
            color: var(--text-white);
        }
        .hero-checklist li i {
            color: var(--accent-amber);
            font-size: 1.1rem;
        }
        .btn-hero-cta {
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border: none;
            color: var(--primary-bg);
            padding: 14px 40px;
            border-radius: 32px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition-base);
            box-shadow: 0 6px 24px rgba(197, 160, 89, 0.35);
        }
        .btn-hero-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(197, 160, 89, 0.55);
            color: var(--primary-bg);
        }
        .hero-image-container {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 48px rgba(0,0,0,0.6);
            border: 1px solid var(--border-color);
        }
        .hero-image-container img {
            object-fit: cover;
            width: 100%;
            height: auto;
        }

        /* Stats */
        .section-stats {
            padding: 40px 0;
            background: var(--secondary-bg);
            border-bottom: 1px solid var(--border-color);
        }
        .stat-item {
            text-align: center;
            padding: 16px;
        }
        .stat-number {
            font-family: var(--font-heading);
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--accent-gold);
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Section Title */
        .section-title {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .section-desc {
            color: var(--text-muted);
            font-size: 1rem;
            margin-bottom: 40px;
        }

        /* Experience Block */
        .exp-block {
            background: var(--secondary-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            margin-bottom: 32px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }
        .exp-block:hover {
            border-color: var(--accent-gold);
            box-shadow: var(--shadow-hover);
        }
        .exp-block h3 {
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 1.4rem;
            color: var(--accent-gold);
            margin-bottom: 12px;
        }
        .exp-block p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .exp-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--accent-amber);
            margin-top: 16px;
        }

        /* Strategy Cards */
        .strategy-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            height: 100%;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .strategy-card:hover {
            border-color: var(--accent-gold);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }
        .strategy-icon {
            width: 48px;
            height: 48px;
            background: rgba(197, 160, 89, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-size: 1.5rem;
            color: var(--accent-amber);
        }
        .strategy-card h4 {
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 1.15rem;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .strategy-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            flex: 1;
        }

        /* Data Table */
        .table-compare {
            background: var(--secondary-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .table-compare th {
            background: rgba(197, 160, 89, 0.08);
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.9rem;
            border-bottom: 2px solid var(--accent-gold);
        }
        .table-compare td {
            color: var(--text-white);
            font-size: 0.9rem;
            border-color: var(--border-color);
            vertical-align: middle;
        }
        .table-compare .badge-yes {
            background: rgba(197, 160, 89, 0.15);
            color: var(--accent-gold);
            padding: 4px 12px;
            border-radius: 16px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* FAQ */
        .faq-section {
            padding: 60px 0;
        }
        .accordion-faq .accordion-item {
            background: var(--secondary-bg);
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            border-radius: var(--radius-md) !important;
            overflow: hidden;
        }
        .accordion-faq .accordion-button {
            background: var(--secondary-bg);
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            box-shadow: none;
            padding: 18px 22px;
        }
        .accordion-faq .accordion-button:not(.collapsed) {
            background: rgba(197, 160, 89, 0.06);
            color: var(--accent-gold);
            box-shadow: none;
        }
        .accordion-faq .accordion-button::after {
            filter: invert(70%) sepia(50%) saturate(400%) hue-rotate(0deg);
        }
        .accordion-faq .accordion-body {
            color: var(--text-muted);
            font-size: 0.95rem;
            background: var(--primary-bg);
            padding: 16px 22px 22px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(197, 160, 89, 0.06), rgba(197, 160, 89, 0.02));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 60px 0;
            text-align: center;
        }
        .cta-section h2 {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 2rem;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-section p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .btn-cta-lg {
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border: none;
            color: var(--primary-bg);
            padding: 16px 48px;
            border-radius: 32px;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 8px 28px rgba(197, 160, 89, 0.4);
            transition: all var(--transition-base);
        }
        .btn-cta-lg:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 36px rgba(197, 160, 89, 0.6);
            color: var(--primary-bg);
        }

        /* Footer */
        .footer-custom {
            background: var(--primary-bg);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 28px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .footer-custom h5 {
            font-family: var(--font-heading);
            font-weight: 600;
            color: var(--accent-gold);
            margin-bottom: 16px;
        }
        .footer-custom a {
            color: var(--text-muted);
            transition: color var(--transition-base);
        }
        .footer-custom a:hover {
            color: var(--accent-amber);
        }
        .footer-custom hr {
            border-color: var(--border-color);
        }

        /* Floating FAB */
        .fab-float {
            position: fixed;
            left: 20px;
            bottom: 90px;
            z-index: 1050;
            width: 52px;
            height: 52px;
            background: var(--secondary-bg);
            border: 2px solid var(--accent-gold);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-amber);
            box-shadow: 0 4px 20px rgba(197, 160, 89, 0.3);
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .fab-float:hover {
            transform: scale(1.12);
            box-shadow: 0 8px 32px rgba(197, 160, 89, 0.55);
        }

        @media (max-width: 768px) {
            .hero-title { font-size: 1.9rem; }
            .section-title { font-size: 1.5rem; }
            .stat-number { font-size: 1.8rem; }
            .exp-block { padding: 20px; }
        }