/* roulang page: index */
:root {
            --primary: #F59E0B;
            --primary-dark: #D97706;
            --secondary: #0B2E1E;
            --accent: #DC2626;
            --bg: #F8FAFC;
            --bg-dark: #051F14;
            --bg-card: #ffffff;
            --text: #1E293B;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius: 1.5rem;
            --shadow: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
            --font: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .header {
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(245,158,11,0.15);
            position: sticky;
            top: 0;
            z-index: 50;
            padding: 0.75rem 0;
        }
        .nav-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #F59E0B, #D97706);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }
        .nav-links a {
            font-weight: 600;
            font-size: 0.95rem;
            transition: 0.2s;
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 0.5rem 1.5rem;
            border-radius: 2rem;
            font-weight: 600;
            transition: 0.25s;
        }
        .btn-login:hover {
            background: rgba(245,158,11,0.08);
        }
        .btn-signup {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            border: none;
            color: white;
            padding: 0.5rem 1.8rem;
            border-radius: 2rem;
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(245,158,11,0.4);
            transition: 0.25s;
        }
        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(245,158,11,0.5);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--text);
        }
        .hero {
            background: linear-gradient(135deg, #FEF3C7 0%, #FFE4B0 100%);
            padding: 3rem 0 2.5rem;
            border-bottom: 2px solid rgba(245,158,11,0.2);
            position: relative;
        }
        .hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 2rem;
        }
        .hero-text {
            flex: 1 1 500px;
        }
        .hero-text h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--secondary);
        }
        .hero-text p {
            font-size: 1.15rem;
            color: #475569;
            margin: 1.25rem 0 1.75rem;
        }
        .hero-badge {
            display: inline-flex;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }
        .hero-badge span {
            background: white;
            padding: 0.5rem 1.2rem;
            border-radius: 2rem;
            font-weight: 600;
            box-shadow: var(--shadow);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .hero-img {
            flex: 1 1 400px;
            text-align: right;
        }
        .hero-img img {
            max-height: 260px;
            border-radius: 2rem;
            box-shadow: 0 20px 35px rgba(0,0,0,0.1);
        }
        .section {
            padding: 3.5rem 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--secondary);
        }
        .section-desc {
            color: var(--text-muted);
            margin-bottom: 2.5rem;
            font-size: 1.05rem;
            max-width: 700px;
        }
        .commission-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.8rem;
        }
        .commission-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.8rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: 0.2s;
        }
        .commission-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .commission-card i {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }
        .material-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .material-item {
            background: white;
            border-radius: 1.2rem;
            padding: 1.2rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            flex: 1 1 280px;
            box-shadow: var(--shadow);
        }
        .settlement-panel {
            background: var(--bg-dark);
            color: white;
            border-radius: var(--radius);
            padding: 2.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            align-items: center;
        }
        .success-story {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.8rem;
        }
        .story-card {
            background: white;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .news-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
            align-items: start;
        }
        .news-main {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .news-item {
            display: flex;
            gap: 1rem;
            background: white;
            border-radius: 1rem;
            padding: 0.8rem;
            box-shadow: var(--shadow);
        }
        .news-item img {
            width: 90px;
            height: 90px;
            object-fit: cover;
            border-radius: 0.8rem;
        }
        .join-banner {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            border-radius: var(--radius);
            padding: 2.5rem;
            text-align: center;
            color: white;
        }
        .footer {
            background: var(--bg-dark);
            color: #CBD5E1;
            padding: 3rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 2rem;
        }
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: radial-gradient(circle at 30% 30%, #FCD34D, #B45309);
            border-radius: 50%;
            box-shadow: 0 6px 25px rgba(245,158,11,0.35);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            transition: 0.25s;
            opacity: 0.85;
        }
        .fab-left:hover {
            opacity: 1;
            transform: scale(1.05);
        }
        @media (max-width: 768px) {
            .nav-links, .nav-actions {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-text h1 {
                font-size: 2rem;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: article */
:root {
            --primary: #F59E0B;
            --primary-dark: #D97706;
            --secondary: #0B2E1E;
            --accent: #DC2626;
            --bg: #F8FAFC;
            --bg-dark: #051F14;
            --bg-card: #ffffff;
            --text: #1E293B;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius: 1.5rem;
            --radius-sm: 0.8rem;
            --shadow: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
            --shadow-lg: 0 20px 40px -10px rgba(0,0,0,0.08);
            --font: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

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

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

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

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

        /* Header */
        .header {
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(245,158,11,0.18);
            position: sticky;
            top: 0;
            z-index: 60;
            padding: 0.75rem 0;
        }

        .nav-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
        }

        .logo {
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #F59E0B, #D97706);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            gap: 1.8rem;
            align-items: center;
            flex-wrap: wrap;
        }

        .nav-links a {
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 0.5rem 1.5rem;
            border-radius: 2rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.9rem;
        }

        .btn-login:hover {
            background: rgba(245,158,11,0.08);
        }

        .btn-signup {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            border: none;
            color: white;
            padding: 0.5rem 1.8rem;
            border-radius: 2rem;
            font-weight: 700;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(245,158,11,0.4);
            transition: var(--transition);
            font-size: 0.9rem;
        }

        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(245,158,11,0.55);
        }

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

        /* Article Body Layout */
        .article-wrapper {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 2.5rem;
            padding: 3rem 0;
            align-items: start;
        }

        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .article-main .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            align-items: center;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 1.8rem;
            padding-bottom: 1.2rem;
            border-bottom: 1px solid var(--border);
        }

        .article-main .article-meta i {
            color: var(--primary);
            margin-right: 0.3rem;
        }

        .article-main h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--secondary);
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .article-main .article-featured-img {
            width: 100%;
            border-radius: var(--radius-sm);
            margin: 1.5rem 0 2rem;
            box-shadow: var(--shadow-lg);
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.7;
            color: #334155;
        }

        .article-content h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--secondary);
            margin: 2rem 0 0.8rem;
            border-left: 4px solid var(--primary);
            padding-left: 1rem;
        }

        .article-content h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            margin: 1.5rem 0 0.6rem;
        }

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

        .article-content ul, 
        .article-content ol {
            margin: 1rem 0 1.5rem 1.8rem;
        }

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

        .article-content blockquote {
            background: linear-gradient(135deg, #FEF3C7, #FFFBEB);
            border-left: 5px solid var(--primary);
            padding: 1.2rem 1.8rem;
            border-radius: 0 1rem 1rem 0;
            margin: 1.8rem 0;
            font-style: italic;
            color: #453A1A;
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
            position: sticky;
            top: 5rem;
        }

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

        .sidebar-card h4 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sidebar-card h4 i {
            color: var(--primary);
        }

        .sidebar-list-item {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            padding: 0.8rem 0;
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
            cursor: pointer;
        }

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

        .sidebar-list-item:hover {
            color: var(--primary);
            transform: translateX(4px);
        }

        .sidebar-list-item img {
            width: 50px;
            height: 50px;
            border-radius: 0.8rem;
            object-fit: cover;
        }

        .app-download-card {
            background: linear-gradient(135deg, #0B2E1E, #051F14);
            color: white;
            text-align: center;
        }

        .app-download-card h4 {
            color: var(--primary);
        }

        .btn-download {
            display: inline-block;
            background: linear-gradient(135deg, #F59E0B, #D97706);
            color: white;
            padding: 0.8rem 2rem;
            border-radius: 2rem;
            font-weight: 700;
            margin-top: 1rem;
            box-shadow: 0 4px 14px rgba(0,0,0,0.3);
            transition: var(--transition);
        }

        .btn-download:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245,158,11,0.5);
        }

        .not-found-area {
            text-align: center;
            padding: 4rem 2rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        .not-found-area i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }

        .btn-back-home {
            display: inline-block;
            background: var(--primary);
            color: white;
            padding: 0.7rem 2rem;
            border-radius: 2rem;
            font-weight: 700;
            margin-top: 1.5rem;
            transition: var(--transition);
        }

        .btn-back-home:hover {
            background: var(--primary-dark);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #0B2E1E, #051F14);
            padding: 3.5rem 0;
            text-align: center;
            color: white;
            margin-top: 2rem;
            border-radius: 2.5rem;
        }

        .cta-section h3 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--primary);
        }

        .cta-section p {
            font-size: 1.1rem;
            color: #CBD5E1;
            margin-bottom: 2rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Footer */
        .footer {
            background: #0B2E1E;
            color: #D1FAE5;
            padding: 3.5rem 0 2rem;
            margin-top: 4rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 2.5rem;
        }

        .footer h4, .footer h5 {
            color: #F59E0B;
            margin-bottom: 1.2rem;
            font-weight: 700;
        }

        .footer a {
            color: #A7F3D0;
            display: inline-block;
            margin-bottom: 0.6rem;
            transition: var(--transition);
        }

        .footer a:hover {
            color: white;
            transform: translateX(3px);
        }

        .footer p {
            color: #94A3B8;
            font-size: 0.9rem;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-wrapper {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
                gap: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: white;
                padding: 1.5rem;
                box-shadow: 0 15px 25px rgba(0,0,0,0.1);
                border-radius: 0 0 1rem 1rem;
                gap: 1rem;
                z-index: 55;
            }
            .nav-links.active-mobile {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-content {
                flex-direction: column;
            }
            .article-main {
                padding: 1.5rem;
            }
            .article-main h1 {
                font-size: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 2.5rem 1.5rem;
                border-radius: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
            .container {
                padding: 0 1rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #F59E0B;
            --primary-dark: #D97706;
            --secondary: #0B2E1E;
            --accent: #DC2626;
            --bg: #F8FAFC;
            --bg-dark: #051F14;
            --bg-card: #ffffff;
            --text: #1E293B;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius: 1.5rem;
            --shadow: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
            --font: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }

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

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

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

        a { color: inherit; text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }

        .header {
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(245,158,11,0.15);
            position: sticky;
            top: 0;
            z-index: 50;
            padding: 0.75rem 0;
        }

        .nav-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #F59E0B, #D97706);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav-links a {
            font-weight: 600;
            font-size: 0.95rem;
            transition: 0.2s;
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
        }

        .nav-links a:hover, .nav-links a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 0.5rem 1.5rem;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: 0.25s;
        }

        .btn-login:hover { background: rgba(245,158,11,0.08); }

        .btn-signup {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            border: none;
            color: white;
            padding: 0.5rem 1.8rem;
            border-radius: 2rem;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(245,158,11,0.4);
            transition: 0.25s;
        }

        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(245,158,11,0.5);
        }

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

        .page-hero {
            background: linear-gradient(135deg, #FEF3C7 0%, #FFE4B0 100%);
            border-bottom: 2px solid rgba(245,158,11,0.2);
            padding: 3rem 0 2.5rem;
        }

        .page-hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 2rem;
        }

        .page-hero-text { flex: 1 1 500px; }
        .page-hero-text h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--secondary);
        }

        .page-hero-text p {
            font-size: 1.1rem;
            color: #475569;
            margin: 1rem 0 1.8rem;
        }

        .hero-indicators {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-bottom: 1.8rem;
        }

        .hero-indicator {
            background: white;
            border-radius: 2rem;
            padding: 0.5rem 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            box-shadow: var(--shadow);
            font-size: 0.9rem;
        }

        .hero-indicator i { color: var(--primary); font-size: 1.2rem; }

        .page-hero-visual { flex: 1 1 380px; text-align: right; }
        .page-hero-visual img {
            border-radius: 2rem;
            box-shadow: 0 20px 35px rgba(0,0,0,0.1);
            max-height: 240px;
            width: auto;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, #F59E0B, #D97706);
            color: white;
            font-weight: 700;
            padding: 0.8rem 2rem;
            border-radius: 2.5rem;
            box-shadow: 0 6px 20px rgba(245,158,11,0.45);
            transition: 0.25s;
            border: none;
            font-size: 1rem;
            cursor: pointer;
        }

        .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.55); }

        .section { padding: 3.8rem 0; }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--secondary);
            text-align: left;
        }

        .section-desc {
            color: var(--text-muted);
            margin-bottom: 2.5rem;
            font-size: 1.05rem;
            max-width: 760px;
            text-align: left;
        }

        .criteria-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 2rem;
        }

        .criteria-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem 1.8rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: 0.25s;
            text-align: left;
        }

        .criteria-card:hover {
            border-color: var(--primary);
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.08);
        }

        .criteria-card i {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 1.2rem;
        }

        .criteria-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--secondary);
        }

        .criteria-card p { color: var(--text-muted); font-size: 0.95rem; }

        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
        }

        .ranking-item {
            background: white;
            border-radius: var(--radius);
            padding: 1.8rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            align-items: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: 0.2s;
        }

        .ranking-item:hover { border-color: var(--primary); }

        .rank-badge {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            min-width: 50px;
        }

        .rank-info { flex: 1 1 220px; }
        .rank-info h4 { font-weight: 700; margin-bottom: 0.3rem; }
        .rank-meta { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.85rem; color: var(--text-muted); }
        .rank-meta span { display: flex; align-items: center; gap: 0.3rem; }
        .rank-meta i { color: var(--primary); }

        .rank-score {
            background: #FEF3C7;
            padding: 0.6rem 1.2rem;
            border-radius: 2rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--secondary);
        }

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

        .feature-img img {
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        .feature-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--secondary);
        }

        .feature-text ul { list-style: none; padding: 0; }
        .feature-text li {
            margin-bottom: 1rem;
            display: flex;
            gap: 0.7rem;
            align-items: flex-start;
        }

        .feature-text li i { color: var(--primary); margin-top: 4px; font-size: 1.2rem; }

        .news-grid-alt {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
            align-items: start;
        }

        .news-main-card {
            background: white;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .news-main-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }

        .news-main-body { padding: 1.5rem; }
        .news-main-body h4 { font-weight: 700; margin-bottom: 0.5rem; font-size: 1.1rem; }
        .news-main-body p { color: var(--text-muted); font-size: 0.9rem; }

        .news-sub-list {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }

        .news-sub-item {
            display: flex;
            gap: 1rem;
            align-items: center;
            background: white;
            border-radius: 1rem;
            padding: 0.8rem;
            box-shadow: var(--shadow);
            transition: 0.2s;
        }

        .news-sub-item:hover { border-left: 3px solid var(--primary); }
        .news-sub-item img { width: 70px; height: 60px; border-radius: 0.6rem; object-fit: cover; }
        .news-sub-item span { font-weight: 600; font-size: 0.9rem; }

        .testimonial-section {
            background: var(--bg-dark);
            color: white;
            padding: 3.5rem 0;
        }

        .testimonial-section .section-title { color: var(--primary); }
        .testimonial-section .section-desc { color: #A3A375; }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }

        .testimonial-card {
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(245,158,11,0.2);
            border-radius: var(--radius);
            padding: 1.8rem;
            text-align: left;
        }

        .testimonial-card p { font-style: italic; margin-bottom: 1rem; color: #D1FAE5; }
        .testimonial-author { font-weight: 700; color: var(--primary); }

        .faq-group { margin-top: 2rem; }
        .faq-item {
            background: white;
            border-radius: 1rem;
            margin-bottom: 1rem;
            box-shadow: var(--shadow);
            overflow: hidden;
        }

        .faq-question {
            padding: 1.2rem 1.5rem;
            font-weight: 700;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: white;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 1rem;
            color: var(--secondary);
            transition: 0.2s;
        }

        .faq-question:hover { background: #FEF3C7; }
        .faq-answer { padding: 0 1.5rem 1.5rem; color: var(--text-muted); display: none; }
        .faq-item.active .faq-answer { display: block; }

        .cta-bar {
            background: linear-gradient(135deg, #FEF3C7 0%, #FFE4B0 100%);
            border-radius: var(--radius);
            padding: 2.5rem;
            text-align: center;
            margin-top: 2rem;
        }

        .cta-bar h4 { font-weight: 800; color: var(--secondary); margin-bottom: 1rem; font-size: 1.4rem; }

        .footer {
            background: var(--bg-dark);
            color: #D1FAE5;
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer a { color: #A3A375; transition: 0.2s; display: inline-block; margin-bottom: 0.4rem; }
        .footer a:hover { color: var(--primary); }
        .footer h4, .footer h5 { color: var(--primary); margin-bottom: 0.8rem; }
        .footer-bottom { border-top: 1px solid rgba(245,158,11,0.2); padding-top: 1.5rem; text-align: center; font-size: 0.85rem; color: #A3A375; }

        @media (max-width: 1024px) {
            .nav-links { gap: 1.2rem; }
            .page-hero-text h1 { font-size: 2.2rem; }
            .feature-grid { grid-template-columns: 1fr; }
            .news-grid-alt { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .mobile-toggle { display: block; }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 65px;
                left: 0;
                right: 0;
                background: white;
                padding: 1.5rem;
                box-shadow: 0 10px 25px rgba(0,0,0,0.1);
                gap: 1rem;
                z-index: 40;
            }
            .nav-links.open { display: flex; }
            .hero-indicators { gap: 0.8rem; }
            .page-hero-visual { text-align: center; }
            .ranking-item { flex-direction: column; align-items: flex-start; }
            .footer-grid { grid-template-columns: 1fr; }
            .section-title { font-size: 1.7rem; }
        }

        @media (max-width: 520px) {
            .page-hero-text h1 { font-size: 1.8rem; }
            .btn-cta { padding: 0.7rem 1.5rem; font-size: 0.9rem; }
            .criteria-grid { grid-template-columns: 1fr; }
            .testimonial-grid { grid-template-columns: 1fr; }
        }

/* roulang page: category2 */
:root {
            --primary: #F59E0B;
            --primary-dark: #D97706;
            --secondary: #0B2E1E;
            --accent: #DC2626;
            --bg: #F8FAFC;
            --bg-dark: #051F14;
            --bg-card: #ffffff;
            --text: #1E293B;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius: 1.5rem;
            --shadow: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
            --font: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }

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

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

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

        a {
            color: inherit;
            text-decoration: none;
        }

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

        .header {
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(245,158,11,0.15);
            position: sticky;
            top: 0;
            z-index: 50;
            padding: 0.75rem 0;
        }

        .nav-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #F59E0B, #D97706);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav-links a {
            font-weight: 600;
            font-size: 0.95rem;
            transition: 0.2s;
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
        }

        .nav-links a:hover, .nav-links a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 0.5rem 1.5rem;
            border-radius: 2rem;
            font-weight: 600;
            cursor: pointer;
            transition: 0.25s;
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(245,158,11,0.08);
        }

        .btn-signup {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            border: none;
            color: white;
            padding: 0.5rem 1.8rem;
            border-radius: 2rem;
            font-weight: 700;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(245,158,11,0.4);
            transition: 0.25s;
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(245,158,11,0.5);
        }

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

        @media (max-width: 1024px) {
            .nav-links {
                gap: 1.2rem;
            }
            .nav-links a {
                font-size: 0.85rem;
            }
            .logo {
                font-size: 1.2rem;
            }
            .btn-login, .btn-signup {
                padding: 0.4rem 1.2rem;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 1.5rem;
                gap: 1rem;
                box-shadow: 0 20px 30px rgba(0,0,0,0.1);
                border-top: 1px solid var(--border);
            }
            .nav-links.show {
                display: flex;
            }
            .nav-actions {
                margin-left: auto;
                margin-right: 0.5rem;
            }
            .btn-login, .btn-signup {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
        }

        .section {
            padding: 3.5rem 0;
        }

        .section-sm {
            padding: 2.5rem 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--secondary);
        }

        .section-desc {
            color: var(--text-muted);
            margin-bottom: 2.5rem;
            font-size: 1.05rem;
            max-width: 700px;
        }

        .btn-primary {
            display: inline-block;
            background: linear-gradient(135deg, #F59E0B, #D97706);
            color: white;
            font-weight: 700;
            padding: 0.8rem 2.2rem;
            border-radius: 2rem;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: 0.25s;
            box-shadow: 0 4px 14px rgba(245,158,11,0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(245,158,11,0.45);
            color: white;
        }

        .page-banner {
            background: linear-gradient(135deg, #0B2E1E 0%, #06311C 100%);
            padding: 2.5rem 0;
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(245,158,11,0.12) 0%, transparent 70%);
            border-radius: 50%;
        }

        .page-banner-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 2rem;
            position: relative;
            z-index: 1;
        }

        .page-banner-text {
            flex: 1 1 550px;
        }

        .page-banner-text h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: #FFF;
            line-height: 1.2;
        }

        .page-banner-text p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.8);
            margin: 1rem 0 1.5rem;
            line-height: 1.6;
        }

        .banner-badges {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .banner-badges span {
            background: rgba(245,158,11,0.15);
            color: #FCD34D;
            padding: 0.4rem 1rem;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid rgba(245,158,11,0.3);
        }

        .page-banner-img {
            flex: 1 1 350px;
            text-align: right;
        }

        .page-banner-img img {
            max-height: 200px;
            border-radius: 1.5rem;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
        }

        .step-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.8rem;
        }

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem 1.8rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: 0.25s;
            text-align: left;
            position: relative;
        }

        .step-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: 0 18px 30px -8px rgba(0,0,0,0.1);
        }

        .step-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.3;
            margin-bottom: 0.5rem;
        }

        .step-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.75rem;
        }

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

        .os-tabs {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }

        .os-tab {
            padding: 0.6rem 1.8rem;
            border-radius: 2rem;
            font-weight: 600;
            cursor: pointer;
            transition: 0.25s;
            background: white;
            border: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .os-tab.active, .os-tab:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(245,158,11,0.25);
        }

        .device-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .device-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            text-align: left;
        }

        .device-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }

        .device-card h3 {
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--secondary);
            margin-bottom: 0.75rem;
        }

        .device-card ul {
            list-style: none;
            margin-top: 1rem;
        }

        .device-card ul li {
            padding: 0.4rem 0;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .device-card ul li i {
            font-size: 0.8rem;
            margin-right: 0.5rem;
            color: var(--primary);
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1.8rem;
        }

        .feature-box {
            background: var(--bg-card);
            border-radius: 1.2rem;
            padding: 1.8rem;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: 0.25s;
            text-align: left;
        }

        .feature-box:hover {
            border-color: var(--primary);
            box-shadow: 0 15px 28px -6px rgba(0,0,0,0.08);
        }

        .feature-box i {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }

        .feature-box h4 {
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.5rem;
        }

        .feature-box p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .safety-list {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }

        .safety-item {
            background: white;
            border-radius: 1rem;
            padding: 1.2rem 1.5rem;
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            box-shadow: var(--shadow);
            border: 1px solid transparent;
            transition: 0.25s;
            text-align: left;
        }

        .safety-item:hover {
            border-color: var(--primary);
        }

        .safety-item i {
            font-size: 1.5rem;
            color: var(--primary);
            margin-top: 0.2rem;
        }

        .safety-item h4 {
            font-weight: 700;
            color: var(--secondary);
        }

        .safety-item p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .faq-block {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem;
            margin-bottom: 1rem;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            text-align: left;
            transition: 0.2s;
        }

        .faq-block:hover {
            border-color: var(--primary);
        }

        .faq-block h3 {
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.5rem;
            font-size: 1.1rem;
        }

        .faq-block p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .news-card {
            background: white;
            border-radius: 1.2rem;
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: 0.25s;
        }

        .news-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
        }

        .news-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .news-card-body {
            padding: 1.2rem;
            text-align: left;
        }

        .news-card-body h4 {
            font-weight: 700;
            font-size: 1rem;
            color: var(--secondary);
        }

        .news-card-body p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin: 0.4rem 0;
        }

        .news-card-body .news-date {
            font-size: 0.8rem;
            color: var(--primary);
        }

        .cta-strip {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            padding: 3rem 0;
            text-align: center;
            border-radius: 2rem;
            margin: 2rem 0;
        }

        .cta-strip h2 {
            color: white;
            font-weight: 800;
            margin-bottom: 1rem;
        }

        .cta-strip p {
            color: rgba(255,255,255,0.9);
            margin-bottom: 1.5rem;
        }

        .btn-white {
            display: inline-block;
            background: white;
            color: var(--primary-dark);
            font-weight: 700;
            padding: 0.8rem 2.5rem;
            border-radius: 2rem;
            transition: 0.25s;
            font-size: 1.05rem;
            box-shadow: 0 6px 18px rgba(0,0,0,0.15);
        }

        .btn-white:hover {
            background: #FEF3C7;
            transform: translateY(-2px);
            color: var(--primary-dark);
        }

        .footer {
            background: var(--bg-dark);
            color: #D1FAE5;
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2rem;
            text-align: left;
        }

        .footer a {
            color: #A3A375;
            font-size: 0.9rem;
            display: inline-block;
            margin-top: 0.3rem;
            transition: 0.2s;
        }

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

        .footer h4, .footer h5 {
            color: #FCD34D;
            font-weight: 700;
        }

        .footer p {
            font-size: 0.9rem;
            color: #A3A375;
        }

        @media (max-width: 768px) {
            .page-banner-text h1 {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .step-card, .feature-box, .device-card {
                padding: 1.5rem;
            }
            .page-banner {
                padding: 2rem 0;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
            .page-banner-text h1 {
                font-size: 1.5rem;
            }
            .btn-primary, .btn-white {
                padding: 0.7rem 1.8rem;
                font-size: 0.95rem;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #F59E0B;
            --primary-dark: #D97706;
            --secondary: #0B2E1E;
            --accent: #DC2626;
            --bg: #F8FAFC;
            --bg-dark: #051F14;
            --bg-card: #ffffff;
            --text: #1E293B;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius: 1.5rem;
            --shadow: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
            --font: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
            margin: 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .header {
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(245,158,11,0.15);
            position: sticky;
            top: 0;
            z-index: 50;
            padding: 0.75rem 0;
        }
        .nav-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #F59E0B, #D97706);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }
        .nav-links a {
            font-weight: 600;
            font-size: 0.95rem;
            transition: 0.2s;
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 0.5rem 1.5rem;
            border-radius: 2rem;
            font-weight: 600;
            transition: 0.25s;
            cursor: pointer;
        }
        .btn-login:hover {
            background: rgba(245,158,11,0.08);
        }
        .btn-signup {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            border: none;
            color: white;
            padding: 0.5rem 1.8rem;
            border-radius: 2rem;
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(245,158,11,0.4);
            transition: 0.25s;
            cursor: pointer;
        }
        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(245,158,11,0.5);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--text);
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: white;
                padding: 1.5rem;
                box-shadow: 0 10px 25px rgba(0,0,0,0.1);
                gap: 1rem;
            }
            .nav-links.show {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-actions {
                display: none;
            }
        }
        .category-hero {
            background: linear-gradient(135deg, #FEF3C7 0%, #FFE4B0 100%);
            padding: 3rem 0 2.5rem;
            border-bottom: 2px solid rgba(245,158,11,0.2);
            position: relative;
        }
        .category-hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 2rem;
        }
        .category-hero-text {
            flex: 1 1 500px;
        }
        .category-hero-text h1 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--secondary);
        }
        .category-hero-text p {
            font-size: 1.15rem;
            color: #475569;
            margin: 1.25rem 0 1.75rem;
        }
        .hero-badge {
            display: inline-flex;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }
        .hero-badge span {
            background: white;
            padding: 0.5rem 1.2rem;
            border-radius: 2rem;
            font-weight: 600;
            box-shadow: var(--shadow);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .category-hero-img {
            flex: 1 1 400px;
            text-align: right;
        }
        .category-hero-img img {
            max-height: 260px;
            border-radius: 2rem;
            box-shadow: 0 20px 35px rgba(0,0,0,0.1);
        }
        .section {
            padding: 3.5rem 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--secondary);
        }
        .section-desc {
            color: var(--text-muted);
            margin-bottom: 2.5rem;
            font-size: 1.05rem;
            max-width: 700px;
        }
        .code-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.8rem;
        }
        .code-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.8rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: 0.2s;
            text-align: left;
        }
        .code-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .code-card .code-badge {
            background: var(--accent);
            color: white;
            padding: 0.3rem 1rem;
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 1rem;
        }
        .code-card h4 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .code-card .code-value {
            background: #FEF3C7;
            padding: 0.5rem 1rem;
            border-radius: 0.8rem;
            font-weight: 700;
            font-family: monospace;
            font-size: 1.1rem;
            color: var(--secondary);
            display: inline-block;
            margin: 0.5rem 0;
        }
        .usage-steps {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 2rem;
        }
        .usage-step {
            background: white;
            border-radius: 1.2rem;
            padding: 1.5rem;
            flex: 1 1 250px;
            box-shadow: var(--shadow);
            border-left: 4px solid var(--primary);
        }
        .usage-step .step-no {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .faq-item {
            background: white;
            border-radius: 1rem;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .faq-item h5 {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: var(--secondary);
        }
        .cta-banner {
            background: linear-gradient(135deg, #0B2E1E 0%, #051F14 100%);
            padding: 3rem 0;
            text-align: left;
            color: white;
        }
        .cta-banner h3 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .cta-banner p {
            color: rgba(255,255,255,0.8);
            margin-bottom: 1.5rem;
        }
        .btn-primary {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            padding: 0.75rem 2rem;
            border-radius: 2rem;
            font-weight: 700;
            color: white;
            border: none;
            cursor: pointer;
            transition: 0.25s;
            box-shadow: 0 4px 14px rgba(245,158,11,0.4);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(245,158,11,0.5);
        }
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 3rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2rem;
        }
        .footer h4,
        .footer h5 {
            color: white;
            margin-bottom: 1rem;
        }
        .footer a {
            color: rgba(255,255,255,0.7);
            display: inline-block;
            margin-bottom: 0.5rem;
            transition: 0.2s;
        }
        .footer a:hover {
            color: var(--primary);
        }
        @media (max-width: 520px) {
            .category-hero-text h1 {
                font-size: 1.8rem;
            }
            .code-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #F59E0B;
            --primary-dark: #D97706;
            --secondary: #0B2E1E;
            --accent: #DC2626;
            --bg: #F8FAFC;
            --bg-dark: #051F14;
            --bg-card: #ffffff;
            --text: #1E293B;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius: 1.5rem;
            --shadow: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
            --font: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .header {
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(245,158,11,0.15);
            position: sticky;
            top: 0;
            z-index: 50;
            padding: 0.75rem 0;
        }
        .nav-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #F59E0B, #D97706);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }
        .nav-links a {
            font-weight: 600;
            font-size: 0.95rem;
            transition: 0.2s;
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 0.5rem 1.5rem;
            border-radius: 2rem;
            font-weight: 600;
            transition: 0.25s;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-login:hover {
            background: rgba(245,158,11,0.08);
        }
        .btn-signup {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            border: none;
            color: white;
            padding: 0.5rem 1.8rem;
            border-radius: 2rem;
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(245,158,11,0.4);
            transition: 0.25s;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(245,158,11,0.5);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--text);
            cursor: pointer;
        }
        .hero-category {
            background: linear-gradient(135deg, #FEF3C7 0%, #FFE4B0 100%);
            padding: 2.5rem 0 2rem;
            border-bottom: 2px solid rgba(245,158,11,0.2);
            position: relative;
            overflow: hidden;
        }
        .hero-category::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(245,158,11,0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-cat-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 2rem;
            position: relative;
            z-index: 2;
        }
        .hero-cat-text {
            flex: 1 1 500px;
        }
        .hero-cat-text h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--secondary);
        }
        .hero-cat-text p {
            font-size: 1.1rem;
            color: #475569;
            margin: 1rem 0 1.5rem;
        }
        .hero-cat-badge {
            display: inline-flex;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .hero-cat-badge span {
            background: white;
            padding: 0.4rem 1rem;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: var(--shadow);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .hero-cat-img {
            flex: 1 1 350px;
            text-align: right;
        }
        .hero-cat-img img {
            max-height: 220px;
            border-radius: 1.8rem;
            box-shadow: 0 18px 30px rgba(0,0,0,0.1);
            display: inline-block;
        }
        .section {
            padding: 3.5rem 0;
        }
        .section-alt {
            background: #F0FDF4;
            padding: 3.5rem 0;
        }
        .section-dark {
            background: var(--bg-dark);
            padding: 3.5rem 0;
            color: white;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--secondary);
        }
        .section-title-light {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: white;
        }
        .section-desc {
            color: var(--text-muted);
            margin-bottom: 2.5rem;
            font-size: 1.05rem;
            max-width: 700px;
        }
        .section-desc-light {
            color: #A3A3A3;
            margin-bottom: 2.5rem;
            font-size: 1.05rem;
            max-width: 700px;
        }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.8rem;
        }
        .tip-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: 0.25s;
            position: relative;
        }
        .tip-card:hover {
            border-color: var(--primary);
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.08);
        }
        .tip-icon {
            font-size: 2.4rem;
            color: var(--primary);
            margin-bottom: 1.2rem;
            display: block;
        }
        .tip-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--secondary);
        }
        .tip-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .step-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            counter-reset: step;
        }
        .step-item {
            display: flex;
            gap: 1.2rem;
            align-items: flex-start;
            background: white;
            padding: 1.5rem;
            border-radius: 1.2rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: 0.2s;
        }
        .step-item:hover {
            border-color: var(--primary);
        }
        .step-num {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, #F59E0B, #D97706);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .step-body h4 {
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.3rem;
        }
        .step-body p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1.5rem;
        }
        .scenario-card {
            background: var(--bg-card);
            border-radius: 1.2rem;
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: 0.2s;
        }
        .scenario-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .scenario-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .scenario-card .scenario-body {
            padding: 1.2rem;
        }
        .scenario-card h4 {
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.4rem;
        }
        .scenario-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .news-section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .news-item {
            display: flex;
            gap: 1.2rem;
            align-items: center;
            background: white;
            padding: 1rem 1.5rem;
            border-radius: 1rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: 0.2s;
        }
        .news-item:hover {
            border-color: var(--primary);
        }
        .news-thumb {
            width: 80px;
            height: 80px;
            border-radius: 0.8rem;
            object-fit: cover;
            flex-shrink: 0;
        }
        .news-info {
            flex: 1;
        }
        .news-info h4 {
            font-weight: 700;
            color: var(--text);
            font-size: 1rem;
            margin-bottom: 0.25rem;
        }
        .news-info p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-bottom: 0.3rem;
        }
        .news-info .news-meta {
            font-size: 0.8rem;
            color: #94A3B8;
        }
        .faq-section {
            background: #FEFCE8;
            padding: 3.5rem 0;
        }
        .faq-item {
            background: white;
            border-radius: 1rem;
            margin-bottom: 1rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            overflow: hidden;
        }
        .faq-question {
            padding: 1.2rem 1.8rem;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--secondary);
            transition: 0.2s;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 1.8rem 1.2rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .cta-bar {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            padding: 3rem 0;
            text-align: center;
            color: white;
        }
        .cta-bar h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
        }
        .cta-bar p {
            font-size: 1.05rem;
            margin-bottom: 1.5rem;
            opacity: 0.95;
        }
        .btn-cta {
            display: inline-block;
            background: white;
            color: var(--primary);
            padding: 0.8rem 2.5rem;
            border-radius: 2.5rem;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 6px 20px rgba(0,0,0,0.15);
            transition: 0.25s;
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(0,0,0,0.2);
            color: var(--primary-dark);
        }
        .footer {
            background: #0B2E1E;
            color: #D1FAE5;
            padding: 2.5rem 0 1.5rem;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer h4, .footer h5 {
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .footer a {
            color: #A7F3D0;
            display: block;
            margin-bottom: 0.4rem;
            transition: 0.2s;
        }
        .footer a:hover {
            color: #F59E0B;
            text-decoration: underline;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1.5rem;
            text-align: center;
            color: #6EE7B7;
            font-size: 0.85rem;
        }
        @media (max-width: 1024px) {
            .hero-cat-text h1 {
                font-size: 1.9rem;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 0.4rem 1rem;
                font-size: 0.85rem;
            }
            .hero-cat-content {
                flex-direction: column;
                text-align: center;
            }
            .hero-cat-img {
                text-align: center;
            }
            .hero-cat-img img {
                max-height: 180px;
            }
            .hero-cat-text h1 {
                font-size: 1.7rem;
            }
            .news-item {
                flex-direction: column;
                text-align: center;
            }
            .news-thumb {
                width: 100%;
                height: 160px;
            }
        }
        @media (max-width: 520px) {
            .hero-cat-text h1 {
                font-size: 1.4rem;
            }
            .section-title, .section-title-light {
                font-size: 1.5rem;
            }
            .tip-card {
                padding: 1.2rem;
            }
        }