/* roulang page: index */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8E99A8;
            --border-color: rgba(0, 240, 255, 0.15);
            --card-bg: rgba(13, 17, 30, 0.75);
            --card-hover-bg: rgba(13, 17, 30, 0.95);
            --glow-blue: 0 0 20px rgba(0, 82, 255, 0.4);
            --glow-cyan: 0 0 25px rgba(0, 240, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Segoe UI', 'Inter', 'Noto Sans', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button, .btn {
            cursor: pointer;
            font-family: inherit;
            transition: all var(--transition-smooth);
        }

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

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Navigation */
        .site-header {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: all var(--transition-smooth);
        }

        .navbar {
            padding: 0.6rem 0;
        }

        .navbar-brand {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.3px;
            transition: color var(--transition-fast);
            white-space: normal;
            word-break: break-word;
        }

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

        .navbar-brand i {
            color: var(--accent-cyan);
            margin-right: 6px;
            font-size: 1.4rem;
            vertical-align: middle;
        }

        .nav-link {
            color: var(--text-silver) !important;
            font-weight: 600;
            font-size: 0.95rem;
            margin: 0 0.35rem;
            padding: 0.5rem 0.9rem !important;
            border-radius: 6px;
            transition: all var(--transition-fast);
        }

        .nav-link:hover, .nav-link:focus, .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.08);
            outline: none;
        }

        .nav-login {
            color: var(--text-silver) !important;
            font-weight: 600;
            margin-right: 0.5rem;
            padding: 0.5rem 1rem !important;
        }

        .nav-signup {
            background: var(--accent-blue);
            color: #fff !important;
            font-weight: 700;
            border-radius: 30px;
            padding: 0.55rem 1.5rem !important;
            box-shadow: var(--glow-blue);
            transition: all var(--transition-smooth);
        }

        .nav-signup:hover {
            background: #0040cc;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.6);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 0.4rem 0.7rem;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px var(--accent-cyan);
            outline: none;
        }

        .navbar-toggler-icon {
            filter: invert(1);
        }

        /* Hero */
        .hero-section {
            background: linear-gradient(135deg, rgba(8, 9, 15, 0.92) 0%, rgba(13, 17, 30, 0.88) 60%, rgba(0, 240, 255, 0.07) 100%), url('/assets/images/backpic/back-1.jpg') center / cover no-repeat;
            min-height: 65vh;
            display: flex;
            align-items: center;
            padding-top: 90px;
            padding-bottom: 40px;
            position: relative;
            border-bottom: 2px solid var(--border-color);
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan), var(--accent-blue));
            opacity: 0.7;
        }

        .hero-breadcrumb {
            font-size: 0.9rem;
            color: var(--text-silver);
            margin-bottom: 1.2rem;
            letter-spacing: 0.3px;
        }

        .hero-breadcrumb span {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .hero-title {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 1.2rem;
        }

        .hero-title .highlight {
            color: var(--accent-cyan);
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-silver);
            max-width: 680px;
            line-height: 1.7;
            margin-bottom: 1.8rem;
        }

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

        .btn-hero-primary {
            background: var(--accent-blue);
            color: #fff;
            font-weight: 700;
            padding: 0.8rem 2.2rem;
            border-radius: 50px;
            font-size: 1.05rem;
            box-shadow: var(--glow-blue);
            border: none;
            transition: all var(--transition-smooth);
        }

        .btn-hero-primary:hover {
            background: #003FCC;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.7);
            transform: translateY(-3px);
            color: #fff;
        }

        .btn-hero-outline {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 700;
            padding: 0.8rem 2.2rem;
            border-radius: 50px;
            font-size: 1.05rem;
            transition: all var(--transition-smooth);
        }

        .btn-hero-outline:hover {
            background: rgba(0, 240, 255, 0.08);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
            color: #fff;
            border-color: #fff;
        }

        .hero-stats-mini {
            display: flex;
            gap: 2.5rem;
            margin-top: 1.5rem;
            color: var(--text-silver);
            font-size: 0.95rem;
        }

        .hero-stats-mini strong {
            color: var(--accent-cyan);
            font-size: 1.3rem;
            display: block;
        }

        /* Section general */
        .section-title {
            font-size: 1.9rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: #fff;
            position: relative;
            display: inline-block;
        }

        .section-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -8px;
            width: 70px;
            height: 4px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

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

        /* Glass cards */
        .glass-card {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.8rem;
            transition: all var(--transition-smooth);
            color: #fff;
        }

        .glass-card:hover {
            background: var(--card-hover-bg);
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.12);
            transform: translateY(-4px);
        }

        .glass-card .card-icon {
            font-size: 2.4rem;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }

        .glass-card h4 {
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .glass-card p {
            color: var(--text-silver);
            margin: 0;
            font-size: 0.95rem;
        }

        /* List highlight */
        .highlight-list li {
            padding: 0.3rem 0;
            color: var(--text-silver);
            list-style: none;
            position: relative;
            padding-left: 1.5rem;
        }

        .highlight-list li::before {
            content: '\f058';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--accent-cyan);
            position: absolute;
            left: 0;
        }

        /* FAQ */
        .accordion-item {
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 0.8rem;
            overflow: hidden;
        }

        .accordion-button {
            background: rgba(13, 17, 30, 0.8);
            color: #fff;
            font-weight: 600;
            border: none;
            box-shadow: none;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
        }

        .accordion-button::after {
            filter: brightness(0) invert(1);
        }

        .accordion-body {
            background: rgba(8, 9, 15, 0.6);
            color: var(--text-silver);
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 2px solid var(--border-color);
            padding: 2.8rem 0 1.8rem;
            color: var(--text-silver);
            font-size: 0.95rem;
        }

        .site-footer h5 {
            color: #fff;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .site-footer a {
            color: var(--text-silver);
            transition: color var(--transition-fast);
        }

        .site-footer 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: center;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-cyber {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1200;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.6rem;
            box-shadow: 0 0 22px rgba(0, 240, 255, 0.55);
            transition: all 0.3s ease;
            cursor: pointer;
            animation: cyberFloat 3s infinite ease-in-out;
        }

        .fab-cyber:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.8);
            transform: scale(1.08);
            color: #fff;
            border-color: var(--accent-cyan);
        }

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

        .fab-cyber .badge-notif {
            position: absolute;
            top: 2px;
            right: 4px;
            width: 14px;
            height: 14px;
            background: #ff0040;
            border-radius: 50%;
            border: 2px solid #000;
            animation: pulse-notif 1.5s infinite;
        }

        @keyframes pulse-notif {
            0%,100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* Responsive */
        @media (max-width: 992px) {
            .hero-title { font-size: 2rem; }
            .hero-desc { font-size: 1rem; }
        }

        @media (max-width: 768px) {
            .hero-section { min-height: auto; padding-top: 110px; padding-bottom: 30px; }
            .hero-title { font-size: 1.7rem; }
            .hero-buttons { flex-direction: column; align-items: stretch; }
            .btn-hero-primary, .btn-hero-outline { text-align: center; }
            .hero-stats-mini { gap: 1.2rem; flex-wrap: wrap; }
            .site-header .navbar-nav { margin-top: 0.8rem; }
            .nav-signup { margin-top: 0.3rem; }
            .fab-cyber { width: 48px; height: 48px; left: 1rem; bottom: 5rem; }
        }

        @media (max-width: 520px) {
            .hero-title { font-size: 1.5rem; }
            .section-title { font-size: 1.6rem; }
        }

/* roulang page: article */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8E99A8;
            --border-color: rgba(0, 240, 255, 0.15);
            --card-bg: rgba(13, 17, 30, 0.75);
            --card-hover-bg: rgba(13, 17, 30, 0.95);
            --glow-blue: 0 0 20px rgba(0, 82, 255, 0.4);
            --glow-cyan: 0 0 25px rgba(0, 240, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        body {
            font-family: 'Segoe UI', 'Inter', 'Noto Sans', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        .btn {
            cursor: pointer;
            font-family: inherit;
            transition: all var(--transition-smooth);
        }

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Navigation */
        .site-header {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: all var(--transition-smooth);
        }

        .navbar {
            padding: 0.6rem 0;
        }

        .navbar-brand {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.3px;
            transition: color var(--transition-fast);
            white-space: normal;
            word-break: break-word;
        }

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

        .navbar-brand i {
            color: var(--accent-cyan);
            margin-right: 6px;
            font-size: 1.4rem;
            vertical-align: middle;
        }

        .nav-link {
            color: var(--text-silver) !important;
            font-weight: 600;
            font-size: 0.95rem;
            margin: 0 0.35rem;
            padding: 0.5rem 0.9rem !important;
            border-radius: 6px;
            transition: all var(--transition-fast);
        }

        .nav-link:hover,
        .nav-link:focus,
        .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.08);
            outline: none;
        }

        .nav-login {
            color: var(--text-silver) !important;
            font-weight: 600;
            margin-right: 0.5rem;
            padding: 0.5rem 1rem !important;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .nav-login:hover {
            color: var(--accent-cyan) !important;
        }

        .nav-signup {
            background: var(--accent-blue);
            color: #fff !important;
            font-weight: 700;
            border-radius: 30px;
            padding: 0.55rem 1.5rem !important;
            box-shadow: var(--glow-blue);
            cursor: pointer;
            transition: all var(--transition-smooth);
        }

        .nav-signup:hover {
            background: #0040cc;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.6);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 0.4rem 0.7rem;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px var(--accent-cyan);
            outline: none;
        }

        .navbar-toggler-icon {
            filter: invert(1);
        }

        /* Article Header */
        .article-header-section {
            background: linear-gradient(135deg, rgba(8, 9, 15, 0.95) 0%, rgba(13, 17, 30, 0.9) 60%, rgba(0, 240, 255, 0.05) 100%), url('/assets/images/backpic/back-2.jpg') center / cover no-repeat;
            min-height: 45vh;
            display: flex;
            align-items: center;
            padding-top: 110px;
            padding-bottom: 50px;
            position: relative;
            border-bottom: 2px solid var(--border-color);
        }

        .article-header-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan), var(--accent-blue));
            opacity: 0.6;
        }

        .article-meta-top {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1.2rem;
            margin-bottom: 1rem;
            font-size: 0.95rem;
            color: var(--text-silver);
        }

        .article-category-tag {
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-cyan);
            padding: 0.3rem 1rem;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 0.3px;
            border: 1px solid rgba(0, 240, 255, 0.3);
        }

        .article-date {
            color: var(--text-muted);
            font-weight: 500;
        }

        .article-date i {
            margin-right: 6px;
            color: var(--accent-cyan);
        }

        .article-h1 {
            font-size: 2.8rem;
            font-weight: 900;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 1.2rem;
            letter-spacing: -0.5px;
        }

        .article-h1 .highlight {
            color: var(--accent-cyan);
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.45);
        }

        .article-excerpt {
            font-size: 1.2rem;
            color: var(--text-silver);
            max-width: 780px;
            line-height: 1.7;
            border-left: 4px solid var(--accent-cyan);
            padding-left: 1.8rem;
            font-style: italic;
            background: rgba(0, 240, 255, 0.03);
            padding: 1.5rem 1.8rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
        }

        /* Article Body */
        .article-body-section {
            padding: 3rem 0;
            background: var(--primary-bg);
        }

        .article-content-wrapper {
            max-width: 820px;
            margin: 0 auto;
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 3rem 2.5rem;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
            color: var(--text-silver);
            font-size: 1.05rem;
            line-height: 1.8;
        }

        .article-content-wrapper h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            margin: 2.2rem 0 1rem;
            padding-bottom: 0.6rem;
            border-bottom: 2px solid rgba(0, 240, 255, 0.2);
            display: inline-block;
        }

        .article-content-wrapper h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin: 1.8rem 0 0.8rem;
        }

        .article-content-wrapper p {
            margin-bottom: 1.3rem;
            color: var(--text-silver);
        }

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

        .article-content-wrapper li {
            margin-bottom: 0.6rem;
            color: var(--text-silver);
        }

        .article-content-wrapper img {
            border-radius: var(--radius-md);
            margin: 1.8rem 0;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
            border: 1px solid var(--border-color);
        }

        .article-content-wrapper strong {
            color: #fff;
            font-weight: 700;
        }

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

        .article-content-wrapper a:hover {
            color: #fff;
        }

        .not-found-message {
            text-align: center;
            padding: 4rem 2rem;
            color: var(--text-silver);
            font-size: 1.1rem;
        }

        .not-found-message .back-home-link {
            display: inline-block;
            margin-top: 1.5rem;
            background: var(--accent-blue);
            color: #fff;
            font-weight: 700;
            padding: 0.8rem 2.2rem;
            border-radius: 50px;
            box-shadow: var(--glow-blue);
            transition: all var(--transition-smooth);
        }

        .not-found-message .back-home-link:hover {
            background: #0040cc;
            box-shadow: 0 0 28px rgba(0, 82, 255, 0.65);
            transform: translateY(-2px);
        }

        /* Related Articles */
        .related-section {
            padding: 3rem 0 4rem;
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-color);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 2rem;
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }

        .section-title i {
            color: var(--accent-cyan);
            font-size: 2rem;
        }

        .related-card {
            background: var(--card-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: all var(--transition-smooth);
            height: 100%;
        }

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

        .related-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.6rem;
            line-height: 1.4;
        }

        .related-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }

        .related-card .read-more {
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

        .related-card .read-more:hover {
            color: #fff;
        }

        .related-card .read-more i {
            margin-left: 4px;
            transition: transform var(--transition-fast);
        }

        .related-card:hover .read-more i {
            transform: translateX(4px);
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-color);
            padding: 3rem 0 1.5rem;
            color: var(--text-silver);
            font-size: 0.95rem;
        }

        .site-footer h5 {
            color: #fff;
            font-weight: 700;
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }

        .site-footer h5 i {
            color: var(--accent-cyan);
        }

        .site-footer ul {
            padding-left: 0;
        }

        .site-footer ul li {
            list-style: none;
            margin-bottom: 0.5rem;
        }

        .site-footer ul li a {
            color: var(--text-silver);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            text-align: center;
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* FAB */
        .fab-container {
            position: fixed;
            left: 1.2rem;
            bottom: 5rem;
            z-index: 1040;
        }

        .fab-btn {
            width: 54px;
            height: 54px;
            border-radius: 50%;
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            transition: all var(--transition-smooth);
            opacity: 0.65;
            animation: neonPulse 2.5s infinite ease-in-out;
        }

        @keyframes neonPulse {
            0%,
            100% {
                box-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
            }
            50% {
                box-shadow: 0 0 30px rgba(0, 240, 255, 0.8), 0 0 60px rgba(0, 82, 255, 0.3);
            }
        }

        .fab-btn:hover {
            opacity: 1;
            transform: scale(1.1);
            background: rgba(0, 240, 255, 0.12);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.75);
            color: #fff;
            animation: none;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .article-h1 {
                font-size: 2.3rem;
            }
            .article-content-wrapper {
                padding: 2.2rem 1.5rem;
            }
        }

        @media (max-width: 768px) {
            .article-header-section {
                min-height: 35vh;
                padding-top: 100px;
                padding-bottom: 35px;
            }
            .article-h1 {
                font-size: 1.9rem;
            }
            .article-excerpt {
                font-size: 1rem;
                padding: 1rem;
                border-left-width: 3px;
            }
            .article-content-wrapper {
                padding: 1.8rem 1.2rem;
                font-size: 0.95rem;
                border-radius: var(--radius-md);
            }
            .article-content-wrapper h2 {
                font-size: 1.5rem;
            }
            .article-content-wrapper h3 {
                font-size: 1.2rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .navbar-brand {
                font-size: 1rem;
            }
            .fab-btn {
                width: 46px;
                height: 46px;
                font-size: 1.3rem;
            }
            .fab-container {
                bottom: 4rem;
                left: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .article-h1 {
                font-size: 1.6rem;
            }
            .article-meta-top {
                gap: 0.8rem;
                font-size: 0.8rem;
            }
            .article-excerpt {
                font-size: 0.9rem;
            }
            .article-content-wrapper {
                padding: 1.5rem 1rem;
            }
            .related-card {
                margin-bottom: 1rem;
            }
            .nav-link {
                margin: 0.2rem 0;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8E99A8;
            --border-color: rgba(0, 240, 255, 0.15);
            --card-bg: rgba(13, 17, 30, 0.75);
            --card-hover-bg: rgba(13, 17, 30, 0.95);
            --glow-blue: 0 0 20px rgba(0, 82, 255, 0.4);
            --glow-cyan: 0 0 25px rgba(0, 240, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Segoe UI', 'Inter', 'Noto Sans', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: 78px;
        }

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

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

        button, .btn {
            cursor: pointer;
            font-family: inherit;
            transition: all var(--transition-smooth);
        }

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

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

        /* Navigation */
        .site-header {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: all var(--transition-smooth);
        }

        .navbar {
            padding: 0.6rem 0;
        }

        .navbar-brand {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.3px;
            transition: color var(--transition-fast);
            white-space: normal;
            word-break: break-word;
        }

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

        .navbar-brand i {
            color: var(--accent-cyan);
            margin-right: 6px;
            font-size: 1.4rem;
            vertical-align: middle;
        }

        .nav-link {
            color: var(--text-silver) !important;
            font-weight: 600;
            font-size: 0.95rem;
            margin: 0 0.35rem;
            padding: 0.5rem 0.9rem !important;
            border-radius: 6px;
            transition: all var(--transition-fast);
        }

        .nav-link:hover, .nav-link:focus, .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.08);
            outline: none;
        }

        .nav-login {
            color: var(--text-silver) !important;
            font-weight: 600;
            margin-right: 0.5rem;
            padding: 0.5rem 1rem !important;
        }

        .nav-signup {
            background: var(--accent-blue);
            color: #fff !important;
            font-weight: 700;
            border-radius: 30px;
            padding: 0.55rem 1.5rem !important;
            box-shadow: var(--glow-blue);
            transition: all var(--transition-smooth);
        }

        .nav-signup:hover {
            background: #0040cc;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.6);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 0.4rem 0.7rem;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px var(--accent-cyan);
            outline: none;
        }

        .navbar-toggler-icon {
            filter: invert(1);
        }

        /* Section Titles */
        .section-title {
            font-size: 2.1rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.8rem;
            position: relative;
            padding-bottom: 0.6rem;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
        }

        .text-accent {
            color: var(--accent-cyan);
        }

        /* Buttons */
        .btn-glow-primary {
            background: var(--accent-blue);
            color: #fff;
            font-weight: 700;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-size: 1rem;
            box-shadow: var(--glow-blue);
            border: none;
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-glow-primary:hover {
            background: #003FCC;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.7);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline-glow {
            background: transparent;
            color: var(--accent-cyan);
            border: 2px solid var(--accent-cyan);
            font-weight: 700;
            padding: 0.7rem 2rem;
            border-radius: 50px;
            font-size: 1rem;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline-glow:hover {
            background: var(--accent-cyan);
            color: #08090F;
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
        }

        /* Hero Sticky Bar */
        .sticky-cta {
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(12px);
            border-top: 1px solid var(--border-color);
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            padding: 12px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        .sticky-cta .info {
            font-size: 0.95rem;
            color: var(--text-silver);
            font-weight: 600;
        }

        .sticky-cta .info strong {
            color: var(--accent-cyan);
        }

        @media (max-width: 768px) {
            .sticky-cta {
                flex-direction: column;
                text-align: center;
            }
            .sticky-cta .btn-glow-primary {
                width: 100%;
                justify-content: center;
            }
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 1051;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(12px);
            border: 2px solid var(--accent-cyan);
            border-radius: 60px;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.6rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: all var(--transition-smooth);
            animation: pulse-glow 2.2s infinite;
        }

        .fab-left:hover {
            background: var(--accent-cyan);
            color: #08090F;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
            animation: none;
        }

        @keyframes pulse-glow {
            0%, 100% { box-shadow: 0 0 12px rgba(0, 240, 255, 0.4); }
            50% { box-shadow: 0 0 22px rgba(0, 240, 255, 0.7); }
        }

        /* Cards */
        .card-service {
            background: var(--card-bg);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2rem;
            transition: all var(--transition-smooth);
            height: 100%;
        }

        .card-service:hover {
            background: var(--card-hover-bg);
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 25px rgba(0, 240, 255, 0.18);
            transform: translateY(-6px);
        }

        .card-service .icon-circle {
            width: 55px;
            height: 55px;
            background: rgba(0, 240, 255, 0.12);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--accent-cyan);
            margin-bottom: 1.3rem;
        }

        /* Device Mockup */
        .device-showcase {
            position: relative;
            background: rgba(0, 0, 0, 0.4);
            border: 1px solid var(--border-color);
            border-radius: 28px;
            padding: 15px;
            max-width: 280px;
            margin: 0 auto;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.15);
        }

        .device-showcase img {
            border-radius: 18px;
        }

        /* Steps */
        .step-item {
            display: flex;
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .step-num {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--accent-cyan);
            opacity: 0.8;
            line-height: 1;
        }

        .step-content h4 {
            font-weight: 700;
            margin-bottom: 0.3rem;
        }

        /* FAQ */
        .accordion-faq .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            margin-bottom: 10px;
            border-radius: var(--radius-md) !important;
            overflow: hidden;
        }

        .accordion-faq .accordion-button {
            background: transparent;
            color: #fff;
            font-weight: 700;
            box-shadow: none;
            font-size: 1.05rem;
            padding: 1.2rem 1.5rem;
        }

        .accordion-faq .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.06);
            color: var(--accent-cyan);
        }

        .accordion-faq .accordion-button::after {
            filter: brightness(0) invert(1);
        }

        .accordion-faq .accordion-body {
            color: var(--text-silver);
            line-height: 1.7;
            padding: 0 1.5rem 1.2rem;
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-color);
            padding: 3rem 0 1.5rem;
            color: var(--text-silver);
        }

        .site-footer h5 {
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }

        .site-footer a {
            color: var(--text-silver);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            margin-top: 2rem;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.9rem;
        }

        @media (max-width: 992px) {
            .navbar-collapse {
                background: rgba(8, 9, 15, 0.95);
                padding: 1rem;
                border-radius: var(--radius-md);
                margin-top: 0.5rem;
            }
        }

/* roulang page: category2 */
/* Design System Variables - Aligned with Homepage */
        :root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8E99A8;
            --border-color: rgba(0, 240, 255, 0.15);
            --card-bg: rgba(13, 17, 30, 0.75);
            --card-hover-bg: rgba(13, 17, 30, 0.95);
            --glow-blue: 0 0 20px rgba(0, 82, 255, 0.4);
            --glow-cyan: 0 0 25px rgba(0, 240, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Reset & Base */
        body {
            font-family: 'Segoe UI', 'Inter', 'Noto Sans', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, .btn {
            cursor: pointer;
            font-family: inherit;
            transition: all var(--transition-smooth);
        }
        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Navigation */
        .site-header {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: all var(--transition-smooth);
        }
        .navbar {
            padding: 0.6rem 0;
        }
        .navbar-brand {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.3px;
            transition: color var(--transition-fast);
            white-space: normal;
            word-break: break-word;
        }
        .navbar-brand:hover {
            color: var(--accent-cyan);
        }
        .navbar-brand i {
            color: var(--accent-cyan);
            margin-right: 6px;
            font-size: 1.4rem;
            vertical-align: middle;
        }
        .nav-link {
            color: var(--text-silver) !important;
            font-weight: 600;
            font-size: 0.95rem;
            margin: 0 0.35rem;
            padding: 0.5rem 0.9rem !important;
            border-radius: 6px;
            transition: all var(--transition-fast);
        }
        .nav-link:hover, .nav-link:focus, .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.08);
            outline: none;
        }
        .nav-login {
            color: var(--text-silver) !important;
            font-weight: 600;
            margin-right: 0.5rem;
            padding: 0.5rem 1rem !important;
            cursor: pointer;
        }
        .nav-login:hover {
            color: var(--accent-cyan) !important;
        }
        .nav-signup {
            background: var(--accent-blue);
            color: #fff !important;
            font-weight: 700;
            border-radius: 30px;
            padding: 0.55rem 1.5rem !important;
            box-shadow: var(--glow-blue);
            transition: all var(--transition-smooth);
            cursor: pointer;
        }
        .nav-signup:hover {
            background: #0040cc;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.6);
            transform: translateY(-1px);
        }
        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 0.4rem 0.7rem;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px var(--accent-cyan);
            outline: none;
        }
        .navbar-toggler-icon {
            filter: invert(1);
        }

        /* Category Hero with Live Countdown */
        .category-hero {
            background: linear-gradient(135deg, rgba(8, 9, 15, 0.92) 0%, rgba(13, 17, 30, 0.88) 60%, rgba(0, 240, 255, 0.07) 100%), url('/assets/images/backpic/back-2.jpg') center / cover no-repeat;
            min-height: 70vh;
            display: flex;
            align-items: center;
            padding-top: 100px;
            padding-bottom: 50px;
            position: relative;
            border-bottom: 2px solid var(--border-color);
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan), var(--accent-blue));
            opacity: 0.7;
        }
        .category-hero .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .hero-content {
            text-align: left;
        }
        .hero-breadcrumb {
            font-size: 0.9rem;
            color: var(--text-silver);
            margin-bottom: 1.5rem;
            letter-spacing: 0.3px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .hero-breadcrumb span {
            color: var(--accent-cyan);
            font-weight: 600;
        }
        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 1.2rem;
        }
        .category-hero h1 .highlight {
            color: var(--accent-cyan);
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }
        .category-hero .hero-desc {
            font-size: 1.1rem;
            color: var(--text-silver);
            max-width: 560px;
            line-height: 1.7;
            margin-bottom: 1.8rem;
        }
        .live-preview-card {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem;
            text-align: center;
            box-shadow: var(--glow-cyan);
            position: relative;
        }
        .live-badge {
            display: inline-block;
            background: #FF0000;
            color: #fff;
            font-weight: 700;
            font-size: 0.8rem;
            padding: 0.25rem 0.9rem;
            border-radius: 20px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            animation: pulse-live 1.5s infinite;
            margin-bottom: 1rem;
        }
        @keyframes pulse-live {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.6; }
        }
        .live-preview-card img {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: 1.2rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
        }
        .countdown-timer {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .countdown-item {
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid var(--accent-cyan);
            border-radius: var(--radius-sm);
            padding: 0.6rem 1rem;
            min-width: 60px;
            text-align: center;
        }
        .countdown-item .number {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-cyan);
            display: block;
        }
        .countdown-item .label {
            font-size: 0.7rem;
            color: var(--text-muted);
            text-transform: uppercase;
        }
        .btn-reminder {
            background: var(--accent-blue);
            color: #fff;
            font-weight: 700;
            padding: 0.85rem 2rem;
            border-radius: 50px;
            border: none;
            box-shadow: var(--glow-blue);
            width: 100%;
            font-size: 1.05rem;
            transition: all var(--transition-smooth);
        }
        .btn-reminder:hover {
            background: #003fcc;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.7);
            transform: scale(1.02);
        }

        /* Features Section - Asymmetrical Grid */
        .features-section {
            padding: 80px 0;
            background: var(--secondary-bg);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .feature-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2rem 1.8rem;
            transition: all var(--transition-smooth);
            text-align: left;
        }
        .feature-item:hover {
            transform: translateY(-6px);
            background: var(--card-hover-bg);
            border-color: var(--accent-cyan);
            box-shadow: var(--glow-cyan);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--accent-cyan);
            margin-bottom: 1.2rem;
        }
        .feature-item h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .feature-item p {
            color: var(--text-silver);
            line-height: 1.65;
            font-size: 0.95rem;
            margin: 0;
        }

        /* Steps Section - Timed Process Flow */
        .steps-section {
            padding: 80px 0;
            background: var(--primary-bg);
        }
        .section-heading {
            margin-bottom: 3.5rem;
            text-align: left;
        }
        .section-heading h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .section-heading p {
            color: var(--text-silver);
            font-size: 1.05rem;
            max-width: 700px;
        }
        .steps-timeline {
            display: flex;
            flex-direction: column;
            gap: 2.5rem;
            max-width: 900px;
        }
        .step-row {
            display: grid;
            grid-template-columns: 80px 1fr;
            gap: 2rem;
            align-items: start;
        }
        .step-number {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            box-shadow: var(--glow-cyan);
            flex-shrink: 0;
        }
        .step-details h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.4rem;
        }
        .step-details p {
            color: var(--text-silver);
            font-size: 1rem;
            line-height: 1.7;
        }

        /* Game Showcase Cards */
        .games-showcase {
            padding: 80px 0;
            background: var(--secondary-bg);
        }
        .game-cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.8rem;
        }
        .game-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-smooth);
            position: relative;
        }
        .game-card:hover {
            transform: scale(1.03);
            border-color: var(--accent-cyan);
            box-shadow: var(--glow-cyan);
            background: var(--card-hover-bg);
        }
        .game-card img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .game-card-body {
            padding: 1.2rem;
            text-align: left;
        }
        .game-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.3rem;
        }
        .game-tag {
            display: inline-block;
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.2rem 0.7rem;
            border-radius: 20px;
            margin-top: 0.4rem;
        }

        /* Comparison / Compatibility Table */
        .compatibility-section {
            padding: 80px 0;
            background: var(--primary-bg);
        }
        .table-responsive {
            overflow-x: auto;
        }
        .compat-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .compat-table th, .compat-table td {
            padding: 1rem 1.5rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        .compat-table thead th {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
            font-weight: 700;
            font-size: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .compat-table tbody td {
            color: var(--text-silver);
            font-size: 0.95rem;
        }
        .compat-table tbody tr:hover {
            background: rgba(0, 240, 255, 0.04);
        }
        .check-icon {
            color: #00E676;
            font-weight: bold;
        }

        /* FAQ Section */
        .faq-section {
            padding: 80px 0;
            background: var(--secondary-bg);
        }
        .accordion-custom .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 1rem;
            overflow: hidden;
        }
        .accordion-custom .accordion-button {
            background: transparent;
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            padding: 1.2rem 1.5rem;
            box-shadow: none;
            border: none;
            transition: all var(--transition-fast);
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.06);
            color: var(--accent-cyan);
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 2px var(--accent-cyan);
            border-color: transparent;
        }
        .accordion-custom .accordion-body {
            color: var(--text-silver);
            line-height: 1.7;
            padding: 0 1.5rem 1.2rem;
        }

        /* CTA Sticky Bar */
        .cta-sticky-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(8, 9, 15, 0.95);
            backdrop-filter: blur(16px);
            border-top: 2px solid var(--border-color);
            padding: 1rem 0;
            z-index: 1040;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 1.2rem;
            box-shadow: 0 -5px 25px rgba(0,0,0,0.6);
        }
        .cta-sticky-bar .btn-download {
            background: var(--accent-blue);
            color: #fff;
            font-weight: 700;
            padding: 0.75rem 2.2rem;
            border-radius: 50px;
            font-size: 1rem;
            border: none;
            box-shadow: var(--glow-blue);
            transition: all var(--transition-smooth);
        }
        .cta-sticky-bar .btn-download:hover {
            background: #0040cc;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.7);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 2px solid var(--border-color);
            padding: 3rem 0 1.5rem;
            color: var(--text-silver);
            margin-bottom: 70px;
        }
        .site-footer h5 {
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 1rem;
        }
        .site-footer a {
            color: var(--text-silver);
            transition: color var(--transition-fast);
        }
        .site-footer a:hover {
            color: var(--accent-cyan);
        }
        .site-footer ul {
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 0.5rem;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            margin-top: 2rem;
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .category-hero .container {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero-content {
                text-align: center;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-row {
                grid-template-columns: 60px 1fr;
                gap: 1.2rem;
            }
            .cta-sticky-bar {
                flex-wrap: wrap;
                gap: 0.8rem;
                padding: 0.8rem 1rem;
            }
        }
        @media (max-width: 768px) {
            .navbar-brand {
                font-size: 1rem;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .step-row {
                grid-template-columns: 50px 1fr;
            }
            .step-number {
                width: 50px;
                height: 50px;
                font-size: 1.4rem;
            }
            .game-cards-grid {
                grid-template-columns: 1fr 1fr;
            }
            .compat-table th, .compat-table td {
                padding: 0.7rem 0.8rem;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 520px) {
            .category-hero {
                min-height: 55vh;
                padding-top: 80px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .countdown-timer {
                gap: 0.5rem;
            }
            .countdown-item {
                padding: 0.4rem 0.5rem;
                min-width: 50px;
            }
            .game-cards-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category3 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8E99A8;
            --border-color: rgba(0, 240, 255, 0.15);
            --card-bg: rgba(13, 17, 30, 0.75);
            --card-hover-bg: rgba(13, 17, 30, 0.95);
            --glow-blue: 0 0 20px rgba(0, 82, 255, 0.4);
            --glow-cyan: 0 0 25px rgba(0, 240, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        body {
            font-family: 'Segoe UI', 'Inter', 'Noto Sans', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        .btn {
            cursor: pointer;
            font-family: inherit;
            transition: all var(--transition-smooth);
        }

        .container {
            max-width: 1280px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Navigation */
        .site-header {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: all var(--transition-smooth);
        }

        .navbar {
            padding: 0.6rem 0;
        }

        .navbar-brand {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.3px;
            transition: color var(--transition-fast);
            white-space: normal;
            word-break: break-word;
        }

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

        .navbar-brand i {
            color: var(--accent-cyan);
            margin-right: 6px;
            font-size: 1.4rem;
            vertical-align: middle;
        }

        .nav-link {
            color: var(--text-silver) !important;
            font-weight: 600;
            font-size: 0.95rem;
            margin: 0 0.35rem;
            padding: 0.5rem 0.9rem !important;
            border-radius: 6px;
            transition: all var(--transition-fast);
        }

        .nav-link:hover,
        .nav-link:focus,
        .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.08);
            outline: none;
        }

        .nav-login {
            color: var(--text-silver) !important;
            font-weight: 600;
            margin-right: 0.5rem;
            padding: 0.5rem 1rem !important;
        }

        .nav-signup {
            background: var(--accent-blue);
            color: #fff !important;
            font-weight: 700;
            border-radius: 30px;
            padding: 0.55rem 1.5rem !important;
            box-shadow: var(--glow-blue);
            transition: all var(--transition-smooth);
        }

        .nav-signup:hover {
            background: #0040cc;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.6);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 0.4rem 0.7rem;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px var(--accent-cyan);
            outline: none;
        }

        .navbar-toggler-icon {
            filter: invert(1);
        }

        /* Hero Section */
        .hero-section {
            background: linear-gradient(135deg, rgba(8, 9, 15, 0.92) 0%, rgba(13, 17, 30, 0.88) 60%, rgba(0, 240, 255, 0.07) 100%), url('/assets/images/backpic/back-2.jpg') center / cover no-repeat;
            min-height: 65vh;
            display: flex;
            align-items: center;
            padding-top: 90px;
            padding-bottom: 40px;
            position: relative;
            border-bottom: 2px solid var(--border-color);
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan), var(--accent-blue));
            opacity: 0.7;
        }

        .hero-breadcrumb {
            font-size: 0.9rem;
            color: var(--text-silver);
            margin-bottom: 1.2rem;
            letter-spacing: 0.3px;
        }

        .hero-breadcrumb span {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .hero-title {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 1.2rem;
        }

        .hero-title .highlight {
            color: var(--accent-cyan);
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-silver);
            max-width: 680px;
            line-height: 1.7;
            margin-bottom: 1.8rem;
        }

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

        .btn-hero-primary {
            background: var(--accent-blue);
            color: #fff;
            font-weight: 700;
            padding: 0.8rem 2.2rem;
            border-radius: 50px;
            font-size: 1.05rem;
            box-shadow: var(--glow-blue);
            border: none;
            transition: all var(--transition-smooth);
        }

        .btn-hero-primary:hover {
            background: #003FCC;
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.7);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-hero-outline {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            padding: 0.8rem 2.2rem;
            border-radius: 50px;
            font-size: 1.05rem;
            transition: all var(--transition-smooth);
        }

        .btn-hero-outline:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            color: #fff;
            border-color: #fff;
        }

        /* Step Cards */
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 3rem;
        }

        .step-card {
            background: var(--card-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            height: 100%;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

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

        .step-number {
            font-size: 3.5rem;
            font-weight: 900;
            color: rgba(0, 240, 255, 0.15);
            position: absolute;
            top: 0.5rem;
            right: 1rem;
            line-height: 1;
            pointer-events: none;
        }

        .step-icon {
            font-size: 2.2rem;
            color: var(--accent-cyan);
            margin-bottom: 1.2rem;
        }

        .step-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: #fff;
        }

        .step-card p {
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.65;
        }

        /* Platform Panel */
        .platform-panel {
            background: var(--secondary-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            margin-top: 2rem;
        }

        .platform-tabs {
            display: flex;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }

        .platform-tab {
            padding: 0.7rem 1.8rem;
            border-radius: 30px;
            font-weight: 600;
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-silver);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .platform-tab.active,
        .platform-tab:hover {
            background: var(--accent-blue);
            border-color: var(--accent-blue);
            color: #fff;
            box-shadow: var(--glow-blue);
        }

        .platform-content h4 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--accent-cyan);
        }

        .platform-content ul {
            list-style: none;
            padding-left: 0;
        }

        .platform-content ul li {
            padding: 0.5rem 0;
            padding-left: 1.6rem;
            position: relative;
            color: var(--text-silver);
        }

        .platform-content ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--accent-cyan);
            position: absolute;
            left: 0;
            font-size: 0.85rem;
        }

        /* FAQ */
        .faq-section {
            background: var(--secondary-bg);
            border-radius: var(--radius-lg);
            padding: 3rem;
            margin-top: 3rem;
        }

        .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--border-color);
        }

        .accordion-button {
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 1.2rem 0;
            box-shadow: none;
        }

        .accordion-button:not(.collapsed) {
            background: transparent;
            color: var(--accent-cyan);
            box-shadow: none;
        }

        .accordion-button::after {
            filter: invert(0.8);
        }

        .accordion-body {
            color: var(--text-silver);
            padding: 0.5rem 0 1.5rem;
            line-height: 1.7;
        }

        /* CTA Bottom */
        .cta-bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(8, 9, 15, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid var(--border-color);
            padding: 0.8rem 0;
            z-index: 1030;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
        }

        .btn-bottom-cta {
            background: var(--accent-blue);
            color: #fff;
            font-weight: 700;
            padding: 0.7rem 2.2rem;
            border-radius: 50px;
            box-shadow: var(--glow-blue);
            border: none;
            transition: all var(--transition-smooth);
        }

        .btn-bottom-cta:hover {
            background: #0040cc;
            box-shadow: 0 0 25px rgba(0, 82, 255, 0.7);
            color: #fff;
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-color);
            padding: 3rem 0 1.5rem;
            margin-top: 5rem;
            color: var(--text-silver);
        }

        .site-footer h5 {
            color: #fff;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .site-footer a {
            color: var(--text-silver);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 1.5rem;
            margin-top: 2rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            text-align: center;
        }

        .mb-90 {
            margin-bottom: 90px;
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(8, 9, 15, 0.98);
                padding: 1rem;
                border-radius: var(--radius-md);
                margin-top: 0.5rem;
            }

            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
        }

        @media (max-width: 575px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                width: 100%;
                text-align: center;
            }
            .step-card {
                padding: 1.5rem;
            }
        }