/* roulang page: index */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --golden: #FFB800;
            --glow-orange: rgba(255, 69, 0, 0.4);
            --font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
        }

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

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

        a {
            text-decoration: none;
            color: var(--accent-orange);
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--text-white);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, .btn, .cta-btn {
            cursor: pointer;
            font-family: var(--font-family);
            border: none;
            outline: none;
            transition: all 0.3s ease;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* NAVIGATION */
        header.nav-header {
            background-color: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-dark);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.6);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .logo-brand i {
            color: var(--accent-red);
            font-size: 2rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
        }
        .nav-links a {
            color: var(--text-warm-gray);
            font-weight: 600;
            font-size: 1rem;
            position: relative;
            padding: 4px 0;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-orange);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2.5px;
            background: linear-gradient(90deg, var(--accent-orange), var(--accent-red));
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .btn-login {
            background: transparent;
            color: var(--text-white);
            font-weight: 700;
            padding: 10px 18px;
            border-radius: 50px;
            border: 1.5px solid var(--border-dark);
            font-size: 0.9rem;
            transition: 0.25s;
        }
        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            font-weight: 800;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            box-shadow: 0 4px 16px var(--glow-orange);
        }
        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 69, 0, 0.6);
        }
        .mobile-menu-btn {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 1.8rem;
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(11, 11, 11, 0.98);
                backdrop-filter: blur(20px);
                padding: 32px 20px;
                gap: 28px;
                border-bottom: 1px solid var(--border-dark);
            }
            .nav-links.open {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
        }

        /* HERO */
        .hero-section {
            background: linear-gradient(180deg, rgba(11,11,11,0.92) 0%, rgba(255,69,0,0.08) 100%), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            padding: 80px 0 90px;
            border-bottom: 2px solid var(--accent-orange);
            position: relative;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 0, 0, 0.2);
            color: var(--accent-orange);
            font-weight: 700;
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            letter-spacing: 0.4px;
            border: 1px solid rgba(255,69,0,0.4);
            margin-bottom: 20px;
        }
        .hero-title {
            font-size: 3.4rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 22px;
            color: white;
        }
        .hero-title span {
            color: var(--accent-orange);
            text-shadow: 0 0 18px var(--glow-orange);
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-warm-gray);
            margin-bottom: 28px;
            max-width: 540px;
            line-height: 1.65;
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary-glow {
            background: var(--accent-orange);
            color: #000;
            font-weight: 800;
            padding: 15px 36px;
            border-radius: 50px;
            font-size: 1.05rem;
            box-shadow: 0 6px 22px var(--glow-orange);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-outline-glow {
            background: transparent;
            border: 2px solid var(--accent-orange);
            color: var(--accent-orange);
            font-weight: 800;
            padding: 15px 32px;
            border-radius: 50px;
        }
        .hero-image-card {
            background: rgba(22,22,22,0.85);
            border-radius: 28px;
            padding: 16px;
            border: 1px solid var(--border-dark);
            text-align: center;
        }
        @media (max-width: 768px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero-title {
                font-size: 2.2rem;
            }
        }

        /* SECTION STYLES */
        section {
            padding: 70px 0;
        }
        .section-label {
            color: var(--accent-orange);
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-size: 0.85rem;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin: 12px 0 18px;
        }
        .section-desc {
            color: var(--text-warm-gray);
            max-width: 700px;
            line-height: 1.65;
            margin-bottom: 36px;
        }

        /* MEMBERSHIP CARDS */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .benefit-card {
            background: var(--card-bg);
            border-radius: 24px;
            padding: 34px 28px;
            border: 1px solid var(--border-dark);
            transition: 0.3s;
        }
        .benefit-card:hover {
            border-color: var(--accent-orange);
            transform: translateY(-6px);
            box-shadow: 0 16px 36px rgba(255,69,0,0.15);
        }
        .benefit-icon {
            font-size: 2.6rem;
            color: var(--accent-orange);
            margin-bottom: 18px;
        }

        /* PRICE COMPARISON */
        .compare-table-wrap {
            overflow-x: auto;
            background: var(--card-bg);
            border-radius: 24px;
            padding: 24px;
            border: 1px solid var(--border-dark);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            color: var(--text-white);
        }
        .compare-table th {
            text-align: left;
            padding: 16px 12px;
            color: var(--accent-orange);
            font-weight: 700;
            border-bottom: 1px solid var(--border-dark);
        }
        .compare-table td {
            padding: 14px 12px;
            border-bottom: 1px solid rgba(42,42,42,0.5);
        }

        /* NEWS LIST */
        .news-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .news-item {
            border-bottom: 1px solid var(--border-dark);
            padding-bottom: 18px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .news-item a {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-white);
        }
        .news-item a:hover {
            color: var(--accent-orange);
        }
        @media (max-width: 680px) {
            .news-list {
                grid-template-columns: 1fr;
            }
        }

        /* CTA REGISTER */
        .cta-register {
            background: linear-gradient(135deg, var(--accent-orange), #B03000);
            border-radius: 32px;
            padding: 56px 40px;
            text-align: left;
        }
        .cta-register h3 {
            font-size: 2rem;
        }

        /* FAQ */
        .faq-item {
            background: var(--card-bg);
            border-radius: 18px;
            padding: 26px 28px;
            margin-bottom: 18px;
            border: 1px solid var(--border-dark);
        }
        .faq-question {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--accent-orange);
            margin-bottom: 10px;
        }

        /* FOOTER */
        footer {
            background: #050505;
            padding: 50px 0 28px;
            border-top: 1px solid var(--border-dark);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 36px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            color: var(--accent-orange);
            margin-bottom: 12px;
        }
        .footer-col a {
            display: block;
            color: var(--text-warm-gray);
            margin: 6px 0;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 90px;
            z-index: 60;
            width: 56px;
            height: 56px;
            background: rgba(22,22,22,0.9);
            backdrop-filter: blur(16px);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid var(--accent-orange);
            box-shadow: 0 0 18px var(--glow-orange);
            animation: pulseGlow 1.8s infinite;
        }
        @keyframes pulseGlow {
            0% { box-shadow: 0 0 14px rgba(255,69,0,0.4); }
            50% { box-shadow: 0 0 28px rgba(255,0,0,0.7); }
            100% { box-shadow: 0 0 14px rgba(255,69,0,0.4); }
        }

/* roulang page: article */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --golden: #FFB800;
            --glow-orange: rgba(255, 69, 0, 0.4);
            --font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            background-color: var(--primary-bg);
            color: var(--text-white);
            font-family: var(--font-family);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: var(--accent-orange);
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--text-white);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, .btn, .cta-btn {
            cursor: pointer;
            font-family: var(--font-family);
            border: none;
            outline: none;
            transition: all 0.3s ease;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        /* Navigation */
        header.nav-header {
            background-color: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-dark);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.6);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .logo-brand i {
            color: var(--accent-red);
            font-size: 2rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
        }
        .nav-links a {
            color: var(--text-warm-gray);
            font-weight: 600;
            font-size: 1rem;
            position: relative;
            padding: 4px 0;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-orange);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2.5px;
            background: linear-gradient(90deg, var(--accent-orange), var(--accent-red));
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .btn-login {
            background: transparent;
            color: var(--text-white);
            font-weight: 700;
            padding: 10px 18px;
            border-radius: 50px;
            border: 1.5px solid var(--border-dark);
            font-size: 0.9rem;
            transition: 0.25s;
        }
        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            font-weight: 800;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            box-shadow: 0 4px 16px var(--glow-orange);
        }
        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 69, 0, 0.6);
        }
        .mobile-menu-btn {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 1.8rem;
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(11, 11, 11, 0.98);
                backdrop-filter: blur(20px);
                padding: 32px 20px;
                gap: 28px;
                border-bottom: 1px solid var(--border-dark);
            }
            .nav-links.open {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
        }
        /* Article Layout */
        .article-wrapper {
            padding: 60px 0 70px;
            background: linear-gradient(180deg, rgba(11,11,11,1) 0%, rgba(255,69,0,0.05) 100%);
        }
        .article-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 50px;
            align-items: start;
        }
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }
        .article-main {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 40px;
            border: 1px solid var(--border-dark);
            box-shadow: 0 8px 32px rgba(0,0,0,0.5);
        }
        .article-main h1 {
            font-size: 2.6rem;
            font-weight: 900;
            line-height: 1.3;
            margin-bottom: 18px;
            color: var(--text-white);
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-bottom: 28px;
            color: var(--text-warm-gray);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i {
            color: var(--accent-orange);
        }
        .article-content {
            color: var(--text-warm-gray);
            line-height: 1.75;
            font-size: 1.08rem;
        }
        .article-content h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
            margin-top: 38px;
            margin-bottom: 16px;
            border-left: 4px solid var(--accent-orange);
            padding-left: 18px;
        }
        .article-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--accent-orange);
            margin-top: 30px;
            margin-bottom: 12px;
        }
        .article-content p {
            margin-bottom: 18px;
            color: var(--text-warm-gray);
        }
        .article-content ul, .article-content ol {
            margin-bottom: 20px;
            padding-left: 24px;
            color: var(--text-warm-gray);
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content img {
            border-radius: 14px;
            margin: 24px 0;
            box-shadow: 0 6px 20px rgba(0,0,0,0.5);
        }
        .side-card {
            background: var(--card-bg);
            border-radius: 18px;
            padding: 28px 24px;
            border: 1px solid var(--border-dark);
            box-shadow: 0 6px 22px rgba(0,0,0,0.4);
            margin-bottom: 28px;
        }
        .side-card h4 {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent-orange);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .side-card ul {
            list-style: none;
        }
        .side-card ul li {
            margin-bottom: 14px;
        }
        .side-card ul li a {
            color: var(--text-warm-gray);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: 0.2s;
        }
        .side-card ul li a:hover {
            color: var(--accent-orange);
            transform: translateX(4px);
        }
        .highlight-box {
            background: linear-gradient(135deg, rgba(255,69,0,0.12) 0%, rgba(255,0,0,0.06) 100%);
            border: 1px solid rgba(255,69,0,0.3);
            border-radius: 16px;
            padding: 24px;
            margin: 24px 0;
        }
        .highlight-box p {
            margin: 0;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1.05rem;
        }
        .not-found-message {
            text-align: left;
            padding: 60px 40px;
            background: var(--card-bg);
            border-radius: 20px;
            border: 1px solid var(--border-dark);
        }
        .not-found-message h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-orange);
            margin-bottom: 14px;
        }
        .not-found-message p {
            color: var(--text-warm-gray);
            margin-bottom: 22px;
        }
        .btn-back-home {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            font-weight: 700;
            padding: 12px 28px;
            border-radius: 50px;
            box-shadow: 0 4px 16px var(--glow-orange);
        }
        .btn-back-home:hover {
            transform: translateY(-3px);
            color: #fff;
            box-shadow: 0 8px 30px rgba(255,69,0,0.6);
        }
        /* Footer */
        footer {
            background-color: var(--secondary-bg);
            padding: 50px 0 30px;
            border-top: 2px solid var(--accent-orange);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 28px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        .footer-col h4 {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--accent-orange);
            margin-bottom: 18px;
        }
        .footer-col a {
            display: block;
            color: var(--text-warm-gray);
            margin-bottom: 10px;
            font-weight: 500;
            transition: 0.2s;
        }
        .footer-col a:hover {
            color: var(--text-white);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-dark);
            padding-top: 22px;
            text-align: left;
            color: var(--text-warm-gray);
            font-size: 0.9rem;
        }

/* roulang page: category1 */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --golden: #FFB800;
            --glow-orange: rgba(255, 69, 0, 0.4);
            --font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
        }


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


        a {
            text-decoration: none;
            color: var(--accent-orange);
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--text-white);
        }


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


        button,
        .btn,
        .cta-btn {
            cursor: pointer;
            font-family: var(--font-family);
            border: none;
            outline: none;
            transition: all 0.3s ease;
        }


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


        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }


        /* NAVIGATION */
        header.nav-header {
            background-color: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-dark);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.6);
        }


        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }


        .logo-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .logo-brand i {
            color: var(--accent-red);
            font-size: 2rem;
        }


        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
        }


        .nav-links a {
            color: var(--text-warm-gray);
            font-weight: 600;
            font-size: 1rem;
            position: relative;
            padding: 4px 0;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-orange);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2.5px;
            background: linear-gradient(90deg, var(--accent-orange), var(--accent-red));
            border-radius: 2px;
        }


        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .btn-login {
            background: transparent;
            color: var(--text-white);
            font-weight: 700;
            padding: 10px 18px;
            border-radius: 50px;
            border: 1.5px solid var(--border-dark);
            font-size: 0.9rem;
            transition: 0.25s;
        }
        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            font-weight: 800;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            box-shadow: 0 4px 16px var(--glow-orange);
        }
        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 69, 0, 0.6);
        }


        .mobile-menu-btn {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 1.8rem;
        }


        @media (max-width: 1024px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(11, 11, 11, 0.98);
                backdrop-filter: blur(20px);
                padding: 32px 20px;
                gap: 28px;
                border-bottom: 1px solid var(--border-dark);
            }
            .nav-links.open {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
        }


        /* HERO CATEGORY */
        .category-hero {
            background: linear-gradient(180deg, rgba(11,11,11,0.94) 0%, rgba(255,69,0,0.12) 100%), url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            padding: 70px 0 80px;
            border-bottom: 2px solid var(--accent-orange);
            position: relative;
        }
        .category-hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        @media (max-width: 768px) {
            .category-hero-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }


        .category-badge {
            display: inline-block;
            background: rgba(255, 0, 0, 0.25);
            color: var(--accent-orange);
            font-weight: 700;
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            letter-spacing: 0.4px;
            border: 1px solid rgba(255,69,0,0.5);
            margin-bottom: 20px;
        }
        .category-title {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 22px;
            color: white;
        }
        .category-title span {
            color: var(--accent-orange);
            text-shadow: 0 0 18px var(--glow-orange);
        }
        .category-desc {
            font-size: 1.15rem;
            color: var(--text-warm-gray);
            margin-bottom: 28px;
            max-width: 540px;
            line-height: 1.65;
        }
        .category-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            font-weight: 800;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1.05rem;
            box-shadow: 0 6px 24px var(--glow-orange);
            transition: 0.3s;
        }
        .btn-primary-glow:hover {
            background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(255, 69, 0, 0.7);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            font-weight: 700;
            padding: 14px 28px;
            border-radius: 50px;
            border: 1.5px solid var(--border-dark);
            font-size: 1rem;
            transition: 0.3s;
        }
        .btn-outline-light:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
            background: rgba(255,69,0,0.05);
        }


        .hero-image-panel {
            background: rgba(28,28,28,0.7);
            border: 1px solid var(--border-dark);
            border-radius: 24px;
            padding: 20px;
            backdrop-filter: blur(8px);
            box-shadow: 0 12px 36px rgba(0,0,0,0.6);
        }
        .hero-image-panel img {
            border-radius: 16px;
        }


        /* SECTION STYLES */
        .section-block {
            padding: 70px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-white);
            text-align: left;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-warm-gray);
            margin-bottom: 40px;
            text-align: left;
            max-width: 700px;
        }


        .steps-horizontal {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-bottom: 20px;
        }
        @media (max-width: 1024px) {
            .steps-horizontal {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .steps-horizontal {
                grid-template-columns: 1fr;
            }
        }
        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 18px;
            padding: 28px 22px;
            text-align: left;
            transition: 0.25s;
            position: relative;
        }
        .step-card:hover {
            border-color: var(--accent-orange);
            box-shadow: 0 8px 24px rgba(255,69,0,0.15);
            transform: translateY(-4px);
        }
        .step-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--accent-orange);
            margin-bottom: 12px;
            line-height: 1;
        }
        .step-card h4 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-warm-gray);
            font-size: 0.95rem;
        }


        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        @media (max-width: 1024px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
        }
        .service-item {
            display: flex;
            gap: 18px;
            background: var(--card-bg);
            padding: 24px;
            border-radius: 16px;
            border: 1px solid var(--border-dark);
            transition: 0.25s;
            text-align: left;
        }
        .service-item:hover {
            border-color: var(--accent-orange);
            box-shadow: 0 6px 20px rgba(255,69,0,0.12);
        }
        .service-icon {
            font-size: 2.4rem;
            color: var(--accent-orange);
            min-width: 50px;
            text-align: left;
        }
        .service-text h5 {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 6px;
        }
        .service-text p {
            color: var(--text-warm-gray);
            font-size: 0.95rem;
        }


        .testimonial-card {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 24px;
            border-left: 4px solid var(--accent-orange);
            margin-bottom: 24px;
        }
        .testimonial-text {
            font-style: italic;
            font-size: 1rem;
            color: var(--text-warm-gray);
            margin-bottom: 14px;
            line-height: 1.6;
        }
        .testimonial-author {
            font-weight: 800;
            color: var(--accent-orange);
            display: block;
            margin-bottom: 4px;
        }
        .testimonial-date {
            font-size: 0.85rem;
            color: var(--text-warm-gray);
        }


        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 14px;
            padding: 20px 24px;
            margin-bottom: 14px;
            cursor: pointer;
            transition: 0.25s;
        }
        .faq-item:hover {
            border-color: var(--accent-orange);
            box-shadow: 0 4px 14px rgba(255,69,0,0.1);
        }
        .faq-question {
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            color: var(--text-warm-gray);
            margin-top: 12px;
            display: none;
            line-height: 1.65;
        }
        .faq-item.open .faq-answer {
            display: block;
        }


        .cta-section {
            background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
            border-top: 1px solid var(--border-dark);
            padding: 70px 0;
            text-align: left;
        }
        .cta-box {
            background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
            border: 1.5px solid var(--accent-orange);
            border-radius: 24px;
            padding: 50px 40px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 30px;
            box-shadow: 0 12px 40px rgba(255,69,0,0.2);
        }
        @media (max-width: 768px) {
            .cta-box {
                flex-direction: column;
                text-align: left;
            }
        }
        .cta-box h3 {
            font-size: 1.8rem;
            font-weight: 800;
        }
        .cta-box p {
            color: var(--text-warm-gray);
            font-size: 1rem;
            max-width: 500px;
        }


        footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-dark);
            padding: 50px 0 20px;
            color: var(--text-warm-gray);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        footer h4 {
            color: white;
            font-weight: 700;
            margin-bottom: 16px;
            font-size: 1.1rem;
        }
        footer a {
            display: block;
            color: var(--text-warm-gray);
            margin-bottom: 10px;
            font-size: 0.95rem;
        }
        footer a:hover {
            color: var(--accent-orange);
        }


        hr {
            border-color: var(--border-dark);
            margin: 30px 0;
        }

/* roulang page: category2 */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --golden: #FFB800;
            --glow-orange: rgba(255, 69, 0, 0.4);
            --font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
        }

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

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

        a {
            text-decoration: none;
            color: var(--accent-orange);
            transition: color 0.25s ease;
        }

        a:hover {
            color: var(--text-white);
        }

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

        button, .btn, .cta-btn {
            cursor: pointer;
            font-family: var(--font-family);
            border: none;
            outline: none;
            transition: all 0.3s ease;
        }

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

        /* NAVIGATION */
        header.nav-header {
            background-color: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-dark);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.6);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }

        .logo-brand i {
            color: var(--accent-red);
            font-size: 2rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-warm-gray);
            font-weight: 600;
            font-size: 1rem;
            position: relative;
            padding: 4px 0;
            transition: color 0.25s;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-orange);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2.5px;
            background: linear-gradient(90deg, var(--accent-orange), var(--accent-red));
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            font-weight: 700;
            padding: 10px 18px;
            border-radius: 50px;
            border: 1.5px solid var(--border-dark);
            font-size: 0.9rem;
            transition: 0.25s;
        }

        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            font-weight: 800;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            box-shadow: 0 4px 16px var(--glow-orange);
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 69, 0, 0.6);
        }

        .mobile-menu-btn {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 1.8rem;
        }

        /* HERO SECTION */
        .hero-section {
            background: linear-gradient(180deg, rgba(11,11,11,0.92) 0%, rgba(255,69,0,0.08) 100%), url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            padding: 60px 0 80px;
            border-bottom: 2px solid var(--accent-orange);
            position: relative;
        }

        .hero-content {
            max-width: 720px;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 0, 0, 0.2);
            color: var(--accent-orange);
            font-weight: 700;
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            letter-spacing: 0.4px;
            border: 1px solid rgba(255,69,0,0.4);
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 22px;
            color: white;
        }

        .hero-title span {
            color: var(--accent-orange);
            text-shadow: 0 0 18px var(--glow-orange);
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-warm-gray);
            margin-bottom: 32px;
            max-width: 540px;
            line-height: 1.65;
        }

        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: white;
            font-weight: 800;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1.05rem;
            box-shadow: 0 6px 24px var(--glow-orange);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s;
        }

        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(255, 69, 0, 0.7);
            color: white;
        }

        /* PROBLEM LIST */
        .problem-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
            margin-bottom: 60px;
        }

        .problem-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 32px 24px;
            transition: all 0.3s ease;
        }

        .problem-card:hover {
            border-color: var(--accent-orange);
            transform: translateY(-6px);
            box-shadow: 0 16px 40px rgba(255, 69, 0, 0.2);
        }

        .problem-card i {
            font-size: 2.2rem;
            color: var(--accent-red);
            margin-bottom: 16px;
        }

        .problem-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: white;
        }

        .problem-card p {
            color: var(--text-warm-gray);
            font-size: 0.95rem;
            line-height: 1.55;
        }

        /* SOLUTION STEPS */
        .solution-block {
            background: var(--secondary-bg);
            border-radius: 20px;
            padding: 48px 40px;
            margin: 60px 0;
            border: 1px solid var(--border-dark);
        }

        .step-item {
            display: flex;
            gap: 20px;
            padding: 24px 0;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            align-items: flex-start;
        }

        .step-number {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: white;
            font-weight: 900;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
            box-shadow: 0 0 16px var(--glow-orange);
        }

        .step-text h4 {
            font-weight: 700;
            font-size: 1.15rem;
            color: white;
            margin-bottom: 6px;
        }

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

        /* FAQ */
        .faq-section {
            margin: 70px 0;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 12px;
            padding: 24px 28px;
            margin-bottom: 16px;
            transition: 0.2s;
        }

        .faq-item:hover {
            border-color: rgba(255,69,0,0.5);
        }

        .faq-item h4 {
            font-weight: 700;
            color: white;
            margin-bottom: 8px;
            font-size: 1.05rem;
        }

        .faq-item p {
            color: var(--text-warm-gray);
            font-size: 0.95rem;
        }

        /* CTA BANNER */
        .cta-banner {
            background: linear-gradient(135deg, rgba(255,69,0,0.16), rgba(255,0,0,0.14));
            border: 1.5px solid var(--accent-orange);
            border-radius: 24px;
            padding: 52px 48px;
            text-align: left;
            margin: 60px 0;
        }

        .cta-banner h2 {
            font-size: 2rem;
            font-weight: 900;
            margin-bottom: 16px;
            color: white;
        }

        .cta-banner p {
            color: var(--text-warm-gray);
            font-size: 1.1rem;
            margin-bottom: 24px;
            max-width: 600px;
        }

        /* FOOTER */
        footer {
            background: var(--secondary-bg);
            padding: 48px 0 28px;
            border-top: 1px solid var(--border-dark);
            margin-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            color: white;
            font-weight: 700;
            margin-bottom: 16px;
            font-size: 1.05rem;
        }

        .footer-col a {
            display: block;
            color: var(--text-warm-gray);
            margin-bottom: 8px;
            font-size: 0.9rem;
            transition: 0.2s;
        }

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

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 24px;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: rgba(22,22,22,0.75);
            backdrop-filter: blur(12px);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid var(--accent-orange);
            box-shadow: 0 0 18px rgba(255,69,0,0.45);
            transition: 0.3s;
            animation: floatFab 3s infinite ease-in-out;
        }

        .fab-left i {
            font-size: 1.6rem;
            color: var(--accent-orange);
        }

        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(255,69,0,0.75);
        }

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

        /* RESPONSIVE */
        @media (max-width: 1024px) {
            .problem-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-title {
                font-size: 2.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(11, 11, 11, 0.98);
                backdrop-filter: blur(20px);
                padding: 32px 20px;
                gap: 28px;
                border-bottom: 1px solid var(--border-dark);
            }
            .nav-links.open {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .problem-grid {
                grid-template-columns: 1fr;
            }
            .solution-block {
                padding: 32px 20px;
            }
            .cta-banner {
                padding: 36px 24px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .fab-left {
                left: 12px;
                bottom: 18px;
                width: 48px;
                height: 48px;
            }
        }

/* roulang page: category3 */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --golden: #FFB800;
            --glow-orange: rgba(255, 69, 0, 0.4);
            --font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            background-color: var(--primary-bg);
            color: var(--text-white);
            font-family: var(--font-family);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: var(--accent-orange);
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--text-white);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, .btn, .cta-btn {
            cursor: pointer;
            font-family: var(--font-family);
            border: none;
            outline: none;
            transition: all 0.3s ease;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        header.nav-header {
            background-color: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-dark);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.6);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .logo-brand i {
            color: var(--accent-red);
            font-size: 2rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
        }
        .nav-links a {
            color: var(--text-warm-gray);
            font-weight: 600;
            font-size: 1rem;
            position: relative;
            padding: 4px 0;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-orange);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2.5px;
            background: linear-gradient(90deg, var(--accent-orange), var(--accent-red));
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .btn-login {
            background: transparent;
            color: var(--text-white);
            font-weight: 700;
            padding: 10px 18px;
            border-radius: 50px;
            border: 1.5px solid var(--border-dark);
            font-size: 0.9rem;
            transition: 0.25s;
        }
        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            font-weight: 800;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            box-shadow: 0 4px 16px var(--glow-orange);
        }
        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 69, 0, 0.6);
        }
        .mobile-menu-btn {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 1.8rem;
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(11, 11, 11, 0.98);
                backdrop-filter: blur(20px);
                padding: 32px 20px;
                gap: 28px;
                border-bottom: 1px solid var(--border-dark);
            }
            .nav-links.open {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
        }
        .hero-section {
            background: linear-gradient(180deg, rgba(11,11,11,0.92) 0%, rgba(255,69,0,0.08) 100%), url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            padding: 80px 0 90px;
            border-bottom: 2px solid var(--accent-orange);
            position: relative;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 0, 0, 0.2);
            color: var(--accent-orange);
            font-weight: 700;
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            letter-spacing: 0.4px;
            border: 1px solid rgba(255,69,0,0.4);
            margin-bottom: 20px;
        }
        .hero-title {
            font-size: 3.4rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 22px;
            color: white;
        }
        .hero-title span {
            color: var(--accent-orange);
            text-shadow: 0 0 18px var(--glow-orange);
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-warm-gray);
            margin-bottom: 28px;
            max-width: 540px;
            line-height: 1.65;
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            font-weight: 800;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1.1rem;
            box-shadow: 0 6px 24px var(--glow-orange);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary-glow:hover {
            background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(255, 69, 0, 0.8);
        }
        @media (max-width: 768px) {
            .hero-grid {
                grid-template-columns: 1fr;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-section {
                padding: 50px 0 60px;
            }
        }
        .promo-highlight {
            padding: 80px 0;
        }
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
            margin-top: 40px;
        }
        .promo-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 32px 24px;
            position: relative;
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .promo-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent-orange);
            box-shadow: 0 12px 32px rgba(255, 69, 0, 0.25);
        }
        .promo-tag {
            position: absolute;
            top: 16px;
            right: 16px;
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        .promo-icon {
            font-size: 2.8rem;
            color: var(--accent-orange);
            margin-bottom: 16px;
        }
        .promo-card h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-white);
        }
        .promo-card p {
            color: var(--text-warm-gray);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }
        .promo-detail {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-orange);
            font-weight: 600;
            font-size: 0.9rem;
        }
        .faq-section {
            padding: 80px 0;
            background-color: var(--secondary-bg);
        }
        .faq-list {
            max-width: 800px;
            margin: 40px auto 0;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-dark);
            padding: 24px 0;
        }
        .faq-question {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .faq-question i {
            color: var(--accent-orange);
            transition: transform 0.3s ease;
        }
        .faq-answer {
            color: var(--text-warm-gray);
            margin-top: 12px;
            font-size: 1rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .cta-strip {
            padding: 80px 0;
            text-align: center;
            background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
        }
        .cta-strip h2 {
            font-size: 2.6rem;
            font-weight: 900;
            margin-bottom: 16px;
        }
        .cta-strip p {
            color: var(--text-warm-gray);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        footer {
            background-color: var(--secondary-bg);
            padding: 60px 0 30px;
            border-top: 1px solid var(--border-dark);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: var(--text-warm-gray);
            margin-bottom: 10px;
            font-size: 0.95rem;
        }
        .footer-col a:hover {
            color: var(--accent-orange);
        }
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50px;
            background: rgba(11, 11, 11, 0.85);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-image: linear-gradient(135deg, #00F0FF, #FF007F) 1;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.5);
            transition: transform 0.3s ease, opacity 0.3s ease;
            opacity: 0.7;
            animation: neonPulse 2s infinite;
        }
        .fab-left:hover {
            transform: scale(1.15);
            opacity: 1;
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.8);
        }
        .fab-left i {
            font-size: 1.8rem;
            color: #fff;
        }
        @keyframes neonPulse {
            0%, 100% { box-shadow: 0 0 16px rgba(0, 240, 255, 0.5); }
            50% { box-shadow: 0 0 28px rgba(0, 240, 255, 0.85); }
        }

/* roulang page: category4 */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --golden: #FFB800;
            --glow-orange: rgba(255, 69, 0, 0.4);
            --font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            background-color: var(--primary-bg);
            color: var(--text-white);
            font-family: var(--font-family);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: var(--accent-orange);
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--text-white);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, .btn, .cta-btn {
            cursor: pointer;
            font-family: var(--font-family);
            border: none;
            outline: none;
            transition: all 0.3s ease;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        header.nav-header {
            background-color: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-dark);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.6);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .logo-brand i {
            color: var(--accent-red);
            font-size: 2rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
        }
        .nav-links a {
            color: var(--text-warm-gray);
            font-weight: 600;
            font-size: 1rem;
            position: relative;
            padding: 4px 0;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-orange);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2.5px;
            background: linear-gradient(90deg, var(--accent-orange), var(--accent-red));
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .btn-login {
            background: transparent;
            color: var(--text-white);
            font-weight: 700;
            padding: 10px 18px;
            border-radius: 50px;
            border: 1.5px solid var(--border-dark);
            font-size: 0.9rem;
            transition: 0.25s;
        }
        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            font-weight: 800;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            box-shadow: 0 4px 16px var(--glow-orange);
        }
        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 69, 0, 0.6);
        }
        .mobile-menu-btn {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 1.8rem;
            border: none;
        }
        .hero-section {
            background: linear-gradient(180deg, rgba(11,11,11,0.92) 0%, rgba(255,69,0,0.08) 100%), url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            padding: 80px 0 90px;
            border-bottom: 2px solid var(--accent-orange);
            position: relative;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 0, 0, 0.2);
            color: var(--accent-orange);
            font-weight: 700;
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            letter-spacing: 0.4px;
            border: 1px solid rgba(255,69,0,0.4);
            margin-bottom: 20px;
        }
        .hero-title {
            font-size: 3.4rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 22px;
            color: white;
        }
        .hero-title span {
            color: var(--accent-orange);
            text-shadow: 0 0 18px var(--glow-orange);
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-warm-gray);
            margin-bottom: 28px;
            max-width: 540px;
            line-height: 1.65;
        }
        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: white;
            font-weight: 800;
            padding: 14px 38px;
            border-radius: 50px;
            font-size: 1.1rem;
            box-shadow: 0 6px 24px var(--glow-orange);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(255, 69, 0, 0.7);
        }
        .hero-image img {
            border-radius: 20px;
            box-shadow: 0 16px 48px rgba(0,0,0,0.7);
            border: 2px solid var(--border-dark);
        }
        .section-header {
            text-align: left;
            margin-bottom: 50px;
        }
        .section-label {
            color: var(--accent-orange);
            font-weight: 700;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            font-size: 0.9rem;
            text-transform: uppercase;
        }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            color: white;
        }
        .section-desc {
            color: var(--text-warm-gray);
            font-size: 1.05rem;
            max-width: 700px;
        }
        .section-padding {
            padding: 80px 0;
        }
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .promo-card {
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-dark);
            transition: all 0.35s ease;
            position: relative;
        }
        .promo-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent-orange);
            box-shadow: 0 12px 36px rgba(255,69,0,0.2);
        }
        .promo-img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .promo-body {
            padding: 24px;
        }
        .promo-tag {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: white;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            margin-bottom: 12px;
        }
        .promo-title {
            font-size: 1.35rem;
            font-weight: 800;
            margin-bottom: 10px;
            color: white;
        }
        .promo-desc {
            color: var(--text-warm-gray);
            font-size: 0.95rem;
            margin-bottom: 18px;
            line-height: 1.6;
        }
        .promo-value {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent-orange);
            margin-bottom: 6px;
        }
        .promo-note {
            color: var(--text-warm-gray);
            font-size: 0.85rem;
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
            counter-reset: step;
        }
        .step-item {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 30px 24px;
            border: 1px solid var(--border-dark);
            position: relative;
            transition: 0.3s;
        }
        .step-item:hover {
            border-color: var(--accent-orange);
        }
        .step-number {
            font-size: 3rem;
            font-weight: 900;
            color: var(--accent-orange);
            opacity: 0.3;
            position: absolute;
            top: 10px;
            right: 20px;
        }
        .step-icon {
            font-size: 2rem;
            color: var(--accent-orange);
            margin-bottom: 16px;
        }
        .step-title {
            font-weight: 800;
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: white;
        }
        .step-desc {
            color: var(--text-warm-gray);
            font-size: 0.9rem;
            line-height: 1.55;
        }
        .faq-list {
            max-width: 800px;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-dark);
            padding: 22px 0;
        }
        .faq-question {
            font-weight: 800;
            font-size: 1.1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: white;
            transition: 0.25s;
        }
        .faq-question:hover {
            color: var(--accent-orange);
        }
        .faq-answer {
            color: var(--text-warm-gray);
            margin-top: 12px;
            font-size: 0.95rem;
            line-height: 1.65;
        }
        .cta-banner {
            background: linear-gradient(135deg, rgba(255,69,0,0.15), rgba(255,0,0,0.1));
            border-radius: 20px;
            padding: 60px 40px;
            text-align: left;
            border: 1px solid var(--border-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255,69,0,0.3), transparent);
            border-radius: 50%;
            z-index: 0;
        }
        .cta-banner > * {
            position: relative;
            z-index: 1;
        }
        .cta-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-desc {
            color: var(--text-warm-gray);
            font-size: 1.1rem;
            margin-bottom: 28px;
        }
        footer {
            background: var(--secondary-bg);
            padding: 50px 0 30px;
            border-top: 1px solid var(--border-dark);
            margin-top: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-col h4 {
            color: white;
            font-weight: 800;
            margin-bottom: 16px;
            font-size: 1.1rem;
        }
        .footer-col p {
            color: var(--text-warm-gray);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .footer-col a {
            display: block;
            color: var(--text-warm-gray);
            font-size: 0.9rem;
            margin-bottom: 10px;
            transition: 0.2s;
        }
        .footer-col a:hover {
            color: var(--accent-orange);
        }
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 60px;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-orange), #FF0000);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 18px var(--glow-orange);
            transition: 0.3s;
            cursor: pointer;
            animation: pulse-glow 2.2s infinite;
        }
        .fab-left:hover {
            transform: scale(1.12);
            box-shadow: 0 0 28px rgba(255,69,0,0.7);
        }
        .fab-left i {
            font-size: 1.5rem;
            color: white;
        }
        @keyframes pulse-glow {
            0%, 100% { box-shadow: 0 0 12px var(--glow-orange); }
            50% { box-shadow: 0 0 26px rgba(255,69,0,0.7); }
        }
        .notification-dot {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 12px;
            height: 12px;
            background: #FFD700;
            border-radius: 50%;
            animation: blink-dot 0.9s infinite;
        }
        @keyframes blink-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .hero-title {
                font-size: 2.6rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(11, 11, 11, 0.98);
                backdrop-filter: blur(20px);
                padding: 32px 20px;
                gap: 28px;
                border-bottom: 1px solid var(--border-dark);
            }
            .nav-links.open {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .promo-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .cta-banner {
                padding: 40px 24px;
            }
            .cta-title {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .btn-primary-glow {
                padding: 12px 28px;
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .nav-actions .btn-login {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
            .nav-actions .btn-signup {
                padding: 8px 18px;
                font-size: 0.85rem;
            }
        }