/* roulang page: index */
:root {
            --bg-primary: #0B1A30;
            --bg-secondary: #0F0C20;
            --accent-cyan: #00F0FF;
            --accent-green: #CCFF00;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --shadow-neon: 0 0 15px rgba(0,240,255,0.5);
            --shadow-dim: 0 0 8px rgba(0,240,255,0.2);
            --border-radius-card: 16px;
            --border-radius-btn: 30px;
            --font-main: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: var(--font-main);
            background: linear-gradient(170deg, var(--bg-secondary) 0%, var(--bg-primary) 50%, #0C1D35 100%);
            color: var(--text-white);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        .container-custom { 
            max-width: 1240px; 
            margin: 0 auto; 
            padding: 0 24px; 
        }

        /* Navigation */
        .site-header {
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: var(--transition-smooth);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
        }

        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
            transition: var(--transition-smooth);
        }
        .logo-text:hover {
            filter: brightness(1.3);
            transform: scale(1.03);
        }
        .logo-text i {
            -webkit-text-fill-color: var(--accent-cyan);
            margin-right: 6px;
            font-size: 1.3rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            color: var(--text-silver);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 4px;
            border-bottom: 2px solid transparent;
            transition: var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-white);
            border-bottom-color: var(--accent-cyan);
            text-shadow: 0 0 10px rgba(0,240,255,0.5);
        }
        .nav-links a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .nav-buttons { display: flex; align-items: center; gap: 14px; }
        .btn-nav-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.3);
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition-smooth);
            cursor: pointer;
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .btn-nav-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-dim);
        }
        .btn-nav-signup {
            background: linear-gradient(135deg, var(--accent-cyan), #0a8df1);
            color: #000;
            border: none;
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 700;
            cursor: pointer;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 4px 15px rgba(0,240,255,0.25);
        }
        .btn-nav-signup:hover {
            transform: scale(1.05);
            box-shadow: var(--shadow-neon);
            background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255,255,255,0.4);
            color: var(--text-white);
            font-size: 1.6rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition-fast);
        }
        .mobile-toggle:hover { border-color: var(--accent-cyan); }

        @media (max-width: 992px) {
            .nav-links, .nav-buttons {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 10px;
                align-items: flex-start;
                padding-top: 16px;
            }
            .nav-links.show, .nav-buttons.show {
                display: flex;
            }
            .mobile-toggle { display: block; }
            .navbar-custom { flex-wrap: wrap; }
        }

        /* Hero */
        .hero-section {
            background: url('/assets/images/backpic/back-3.jpg') center center / cover no-repeat;
            background-blend-mode: overlay;
            background-color: rgba(11, 26, 48, 0.85);
            perspective: 800px;
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 50%, rgba(0,240,255,0.15) 0%, transparent 70%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            padding: 70px 0;
        }
        .hero-badge {
            background: rgba(255,0,0,0.85);
            display: inline-block;
            padding: 8px 20px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.9rem;
            letter-spacing: 0.5px;
            margin-bottom: 18px;
            animation: pulse-badge 1.8s infinite;
            border: 1px solid rgba(255,255,255,0.25);
        }
        @keyframes pulse-badge {
            0% { transform: scale(1); }
            50% { transform: scale(1.04); box-shadow: 0 0 18px rgba(255,0,0,0.6); }
            100% { transform: scale(1); }
        }
        .hero-title {
            font-size: clamp(2.4rem, 5vw, 3.6rem);
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 20px;
            text-shadow: 0 0 20px rgba(0,240,255,0.4);
        }
        .hero-title span {
            color: var(--accent-green);
            display: inline-block;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-silver);
            max-width: 650px;
            margin-bottom: 30px;
            line-height: 1.65;
        }
        .hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }
        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-cyan);
            color: #000;
            font-weight: 700;
            padding: 14px 34px;
            border-radius: 30px;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition-smooth);
            box-shadow: var(--shadow-neon);
            text-decoration: none;
        }
        .btn-glow:hover {
            background: var(--accent-green);
            box-shadow: 0 0 25px rgba(204,255,0,0.7);
            transform: translateY(-2px);
            color: #000;
        }
        .btn-outline-light-custom {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.5);
            padding: 14px 34px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition-smooth);
            cursor: pointer;
        }
        .btn-outline-light-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-dim);
        }

        /* Sections */
        .section-padding { padding: 70px 0; }
        .section-title {
            font-weight: 800;
            font-size: 2rem;
            margin-bottom: 14px;
            color: var(--text-white);
            position: relative;
        }
        .section-subtitle {
            color: var(--text-silver);
            margin-bottom: 40px;
            font-size: 1.05rem;
            max-width: 700px;
        }

        .card-custom {
            background: rgba(255,255,255,0.04);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--border-radius-card);
            padding: 28px 24px;
            transition: var(--transition-smooth);
            height: 100%;
            color: var(--text-white);
        }
        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: 0 10px 30px rgba(0,240,255,0.2);
            border-color: var(--accent-cyan);
        }
        .card-custom i {
            font-size: 2.2rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
            display: block;
        }
        .card-custom h5 {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .card-custom p {
            color: var(--text-silver);
            line-height: 1.6;
            margin: 0;
        }

        .testimonial-item {
            background: linear-gradient(135deg, rgba(0,240,255,0.08), rgba(204,255,0,0.05));
            border-left: 4px solid var(--accent-cyan);
            padding: 22px 24px;
            border-radius: 0 12px 12px 0;
            margin-bottom: 20px;
        }
        .testimonial-text {
            font-size: 1rem;
            font-style: italic;
            color: var(--text-silver);
            margin-bottom: 10px;
        }
        .testimonial-author {
            font-weight: 700;
            color: var(--accent-cyan);
        }

        /* CTA promo */
        .cta-strip {
            background: linear-gradient(135deg, rgba(0,240,255,0.1), rgba(204,255,0,0.1));
            border: 1px solid rgba(0,240,255,0.3);
            border-radius: 20px;
            padding: 40px;
            text-align: center;
        }

        /* FAQ */
        .faq-item {
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 12px;
            padding: 20px 24px;
            margin-bottom: 16px;
            transition: var(--transition-fast);
        }
        .faq-item:hover { border-color: var(--accent-cyan); }
        .faq-question {
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: var(--accent-green);
        }
        .faq-answer {
            color: var(--text-silver);
            line-height: 1.6;
        }

        /* News list */
        .news-list-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 18px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            transition: var(--transition-fast);
        }
        .news-list-item:hover { background: rgba(0,240,255,0.05); padding-left: 12px; border-radius: 8px; }
        .news-list-item a {
            font-weight: 700;
            color: var(--text-white);
            font-size: 1.05rem;
            transition: var(--transition-fast);
        }
        .news-list-item a:hover { color: var(--accent-cyan); }
        .news-date {
            color: var(--accent-green);
            font-weight: 600;
            white-space: nowrap;
            font-size: 0.85rem;
        }

        /* Footer */
        .site-footer {
            background: #08080F;
            border-top: 1px solid rgba(0,240,255,0.2);
            padding: 40px 0;
            color: var(--text-silver);
            font-size: 0.9rem;
        }
        .footer-links {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 16px;
            justify-content: center;
        }
        .footer-links a {
            color: var(--text-silver);
            font-weight: 500;
        }
        .footer-links a:hover { color: var(--accent-cyan); }

        /* FAB Cyber Neon */
        .fab-custom {
            position: fixed;
            left: 1.2rem;
            bottom: 6rem;
            z-index: 1200;
            background: rgba(0,0,0,0.65);
            backdrop-filter: blur(12px);
            width: 56px;
            height: 56px;
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid transparent;
            background-clip: padding-box;
            position: relative;
            box-shadow: 0 0 12px rgba(0,240,255,0.5);
            animation: float-neon 2.6s infinite ease-in-out;
            transition: var(--transition-smooth);
            cursor: pointer;
            opacity: 0.85;
        }
        .fab-custom::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50px;
            padding: 2px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask-composite: exclude;
            z-index: -1;
        }
        .fab-custom:hover {
            opacity: 1;
            transform: scale(1.12);
            box-shadow: 0 0 25px rgba(0,240,255,0.8);
        }
        .fab-custom i {
            font-size: 1.5rem;
            color: var(--accent-cyan);
        }
        @keyframes float-neon {
            0% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
            100% { transform: translateY(0); }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero-title { font-size: 2rem; }
            .section-title { font-size: 1.6rem; }
            .container-custom { padding: 0 16px; }
            .cta-strip { padding: 24px; }
            .fab-custom { left: 0.8rem; bottom: 5rem; width: 48px; height: 48px; }
        }

/* roulang page: article */
:root {
            --bg-primary: #0B1A30;
            --bg-secondary: #0F0C20;
            --accent-cyan: #00F0FF;
            --accent-green: #CCFF00;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --shadow-neon: 0 0 15px rgba(0,240,255,0.5);
            --shadow-dim: 0 0 8px rgba(0,240,255,0.2);
            --border-radius-card: 16px;
            --border-radius-btn: 30px;
            --font-main: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: var(--font-main);
            background: linear-gradient(170deg, var(--bg-secondary) 0%, var(--bg-primary) 50%, #0C1D35 100%);
            color: var(--text-white);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--accent-cyan); text-decoration: none; transition: var(--transition-fast); }
        a:hover { color: var(--accent-green); text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container-custom { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

        /* Navigation */
        .site-header {
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: var(--transition-smooth);
        }
        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
        }
        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: var(--transition-smooth);
        }
        .logo-text:hover {
            filter: brightness(1.3);
            transform: scale(1.03);
        }
        .logo-text i {
            -webkit-text-fill-color: var(--accent-cyan);
            margin-right: 6px;
            font-size: 1.3rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: var(--text-silver);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 4px;
            border-bottom: 2px solid transparent;
            transition: var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-white);
            border-bottom-color: var(--accent-cyan);
            text-shadow: 0 0 10px rgba(0,240,255,0.5);
        }
        .nav-links a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .nav-buttons { display: flex; align-items: center; gap: 14px; }
        .btn-nav-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.3);
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition-smooth);
            cursor: pointer;
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .btn-nav-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-dim);
        }
        .btn-nav-signup {
            background: linear-gradient(135deg, var(--accent-cyan), #0a8df1);
            color: #000;
            border: none;
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 700;
            cursor: pointer;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 4px 15px rgba(0,240,255,0.25);
        }
        .btn-nav-signup:hover {
            transform: scale(1.05);
            box-shadow: var(--shadow-neon);
            background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255,255,255,0.4);
            color: var(--text-white);
            font-size: 1.6rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition-fast);
        }
        .mobile-toggle:hover { border-color: var(--accent-cyan); }

        /* Article Content Area */
        .article-section {
            padding: 50px 0;
        }
        .article-container {
            max-width: 860px;
            margin: 0 auto;
        }
        .article-header {
            margin-bottom: 30px;
            padding-bottom: 25px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .article-thumb {
            border-radius: var(--border-radius-card);
            overflow: hidden;
            margin-bottom: 30px;
            box-shadow: 0 8px 30px rgba(0,240,255,0.1);
        }
        .article-category-tag {
            display: inline-block;
            background: rgba(0,240,255,0.1);
            color: var(--accent-cyan);
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
            border: 1px solid rgba(0,240,255,0.25);
        }
        .article-meta {
            color: var(--text-silver);
            font-size: 0.9rem;
            margin-top: 10px;
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
        }
        .article-meta i {
            color: var(--accent-cyan);
            margin-right: 5px;
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.8;
            color: #D1D5DB;
        }
        .article-content h2 {
            font-size: 1.7rem;
            font-weight: 700;
            margin-top: 35px;
            margin-bottom: 16px;
            color: var(--text-white);
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .article-content h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--accent-cyan);
        }
        .article-content p {
            margin-bottom: 18px;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content img {
            border-radius: 12px;
            margin: 20px 0;
        }
        .article-content blockquote {
            background: rgba(0,240,255,0.05);
            border-left: 4px solid var(--accent-cyan);
            padding: 18px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
            font-style: italic;
            color: var(--text-silver);
        }
        .not-found-box {
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: var(--border-radius-card);
            padding: 60px 30px;
            text-align: center;
        }
        .not-found-box i {
            font-size: 3rem;
            color: var(--accent-cyan);
            margin-bottom: 20px;
            display: block;
        }
        .not-found-box h2 {
            font-size: 1.6rem;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-silver);
            margin-bottom: 24px;
        }
        .btn-glow {
            background: linear-gradient(135deg, var(--accent-cyan), #0a8df1);
            color: #000;
            border: none;
            padding: 12px 32px;
            border-radius: var(--border-radius-btn);
            font-weight: 700;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition-smooth);
            display: inline-block;
            box-shadow: 0 4px 15px rgba(0,240,255,0.25);
        }
        .btn-glow:hover {
            transform: scale(1.05);
            box-shadow: var(--shadow-neon);
            background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
            color: #000;
        }

        /* Coupon Hero (Blueprint Requirement) */
        .coupon-hero {
            background: linear-gradient(180deg, rgba(15,12,32,0.7) 0%, rgba(11,26,48,0.9) 100%);
            padding: 30px 0 0;
            margin-bottom: 20px;
        }
        .coupon-wall {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .coupon-main {
            background: linear-gradient(145deg, #1a2f4a, #0d1a2b);
            border: 2px solid var(--accent-cyan);
            border-radius: 20px;
            padding: 30px 40px;
            text-align: center;
            box-shadow: var(--shadow-neon);
            min-width: 280px;
            position: relative;
            overflow: hidden;
        }
        .coupon-main::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0,240,255,0.08) 0%, transparent 70%);
            animation: rotateGlow 8s linear infinite;
        }
        @keyframes rotateGlow {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .coupon-badge {
            background: #FF0000;
            color: #FFF;
            font-weight: 800;
            font-size: 0.8rem;
            padding: 5px 15px;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 10px;
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.7; }
        }
        .coupon-discount {
            font-size: 3.5rem;
            font-weight: 900;
            background: linear-gradient(180deg, var(--accent-green) 0%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
            z-index: 1;
        }
        .coupon-desc {
            color: var(--text-silver);
            font-size: 0.95rem;
            margin-top: 5px;
            position: relative;
            z-index: 1;
        }
        .btn-coupon-claim {
            background: var(--accent-green);
            color: #000;
            border: none;
            padding: 14px 30px;
            border-radius: var(--border-radius-btn);
            font-weight: 800;
            font-size: 1rem;
            cursor: pointer;
            margin-top: 16px;
            transition: var(--transition-smooth);
            position: relative;
            z-index: 1;
        }
        .btn-coupon-claim:hover {
            transform: scale(1.08);
            box-shadow: 0 0 25px rgba(204,255,0,0.6);
        }
        .coupon-side {
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: 16px;
            padding: 24px 28px;
            text-align: center;
            min-width: 190px;
        }
        .coupon-side .side-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
        }
        .btn-coupon-side {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 8px 22px;
            border-radius: 20px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-smooth);
            margin-top: 8px;
        }
        .btn-coupon-side:hover {
            background: rgba(0,240,255,0.1);
        }

        /* Sticky Download Bar */
        .sticky-download-bar {
            background: rgba(15,12,32,0.95);
            backdrop-filter: blur(15px);
            border: 1px solid rgba(0,240,255,0.2);
            border-radius: var(--border-radius-card);
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin: 40px 0;
        }
        .sticky-download-bar .bar-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sticky-download-bar .bar-info i {
            font-size: 2rem;
            color: var(--accent-cyan);
        }
        .bar-title {
            font-weight: 700;
            font-size: 1.1rem;
        }
        .bar-sub {
            color: var(--text-silver);
            font-size: 0.85rem;
        }

        /* Feature Table */
        .spec-table {
            width: 100%;
            margin: 25px 0;
            border-collapse: separate;
            border-spacing: 0 8px;
        }
        .spec-table tr {
            background: rgba(255,255,255,0.03);
            border-radius: 10px;
        }
        .spec-table td {
            padding: 14px 20px;
            color: var(--text-white);
        }
        .spec-table td:first-child {
            font-weight: 600;
            color: var(--accent-cyan);
            width: 40%;
            white-space: nowrap;
        }
        .spec-table td:last-child {
            color: var(--text-silver);
        }
        .spec-table i.fa-check-circle {
            color: var(--accent-green);
        }

        /* Screenshot Carousel */
        .screenshot-carousel {
            display: flex;
            gap: 16px;
            overflow-x: auto;
            padding: 16px 0;
            scrollbar-width: thin;
            scrollbar-color: var(--accent-cyan) rgba(255,255,255,0.05);
        }
        .screenshot-carousel::-webkit-scrollbar { height: 6px; }
        .screenshot-carousel::-webkit-scrollbar-thumb { background: var(--accent-cyan); border-radius: 10px; }
        .screenshot-carousel img {
            width: 240px;
            border-radius: 14px;
            flex-shrink: 0;
            border: 2px solid rgba(255,255,255,0.08);
            transition: var(--transition-smooth);
            cursor: pointer;
        }
        .screenshot-carousel img:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-dim);
            transform: translateY(-2px);
        }

        /* Shared FAQ */
        .faq-item {
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: 12px;
            padding: 20px 24px;
            margin-bottom: 12px;
            transition: var(--transition-fast);
        }
        .faq-item:hover { border-color: rgba(0,240,255,0.3); }
        .faq-item h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--text-white); }
        .faq-item p { color: var(--text-silver); margin: 0; font-size: 0.95rem; }

        /* Footer */
        .site-footer {
            background: rgba(15, 12, 32, 0.7);
            border-top: 1px solid rgba(0,240,255,0.1);
            padding: 30px 0;
            margin-top: 50px;
            color: var(--text-silver);
        }
        .footer-links { margin-bottom: 16px; display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; }
        .footer-links a { color: var(--text-silver); font-weight: 600; font-size: 0.9rem; }
        .footer-links a:hover { color: var(--accent-cyan); }

        @media (max-width: 1024px) {
            .container-custom { padding: 0 18px; }
            .article-container { padding: 0 10px; }
        }
        @media (max-width: 768px) {
            .nav-links, .nav-buttons { display: none; width: 100%; flex-direction: column; gap: 10px; align-items: flex-start; padding-top: 16px; }
            .nav-links.show, .nav-buttons.show { display: flex; }
            .mobile-toggle { display: block; }
            .navbar-custom { flex-wrap: wrap; }
            .coupon-wall { flex-direction: column; }
            .sticky-download-bar { flex-direction: column; text-align: center; }
            .screenshot-carousel img { width: 180px; }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0B1A30;
            --bg-secondary: #0F0C20;
            --accent-cyan: #00F0FF;
            --accent-green: #CCFF00;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --shadow-neon: 0 0 15px rgba(0,240,255,0.5);
            --shadow-dim: 0 0 8px rgba(0,240,255,0.2);
            --border-radius-card: 16px;
            --border-radius-btn: 30px;
            --font-main: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        body {
            font-family: var(--font-main);
            background: linear-gradient(170deg, var(--bg-secondary) 0%, var(--bg-primary) 50%, #0C1D35 100%);
            color: var(--text-white);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { 
            color: var(--accent-cyan); 
            text-decoration: none; 
            transition: var(--transition-fast);
        }
        a:hover { color: var(--accent-green); text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container-custom { 
            max-width: 1240px; 
            margin: 0 auto; 
            padding: 0 24px; 
        }

        /* Navigation */
        .site-header {
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: var(--transition-smooth);
        }
        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
        }
        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
            transition: var(--transition-smooth);
        }
        .logo-text:hover {
            filter: brightness(1.3);
            transform: scale(1.03);
        }
        .logo-text i {
            -webkit-text-fill-color: var(--accent-cyan);
            margin-right: 6px;
            font-size: 1.3rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: var(--text-silver);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 4px;
            border-bottom: 2px solid transparent;
            transition: var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-white);
            border-bottom-color: var(--accent-cyan);
            text-shadow: 0 0 10px rgba(0,240,255,0.5);
        }
        .nav-links a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .nav-buttons { display: flex; align-items: center; gap: 14px; }
        .btn-nav-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.3);
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition-smooth);
            cursor: pointer;
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .btn-nav-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-dim);
        }
        .btn-nav-signup {
            background: linear-gradient(135deg, var(--accent-cyan), #0a8df1);
            color: #000;
            border: none;
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 700;
            cursor: pointer;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 4px 15px rgba(0,240,255,0.25);
        }
        .btn-nav-signup:hover {
            transform: scale(1.05);
            box-shadow: var(--shadow-neon);
            background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255,255,255,0.4);
            color: var(--text-white);
            font-size: 1.6rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition-fast);
        }
        .mobile-toggle:hover { border-color: var(--accent-cyan); }

        /* Hero */
        .hero-section {
            background: url('/assets/images/backpic/back-3.jpg') center center / cover no-repeat;
            background-blend-mode: overlay;
            background-color: rgba(11, 26, 48, 0.85);
            position: relative;
            min-height: 500px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 50%, rgba(0,240,255,0.15) 0%, transparent 70%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            padding: 60px 0;
        }
        .hero-badge {
            background: rgba(255,0,0,0.85);
            display: inline-block;
            padding: 8px 20px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.8rem;
            letter-spacing: 1px;
            color: #fff;
            margin-bottom: 20px;
            text-transform: uppercase;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff, #d1f2eb);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-silver);
            margin-bottom: 30px;
            max-width: 700px;
        }
        .hero-data-panel {
            background: rgba(15,12,32,0.7);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(0,240,255,0.25);
            border-radius: 24px;
            padding: 28px;
            box-shadow: var(--shadow-dim);
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .data-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .data-item:last-child { border-bottom: none; }
        .data-icon {
            width: 44px;
            height: 44px;
            background: rgba(0,240,255,0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
        }
        .data-label { color: var(--text-silver); font-size: 0.8rem; }
        .data-value { font-weight: 700; font-size: 1.1rem; color: #fff; }

        /* Section Titles */
        .section-label {
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .section-desc {
            color: var(--text-silver);
            font-size: 1.05rem;
            max-width: 800px;
            margin-bottom: 40px;
        }

        /* Cards */
        .tip-card {
            background: rgba(15,12,32,0.6);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0,240,255,0.1);
            border-radius: var(--border-radius-card);
            padding: 28px;
            transition: var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .tip-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-dim);
            transform: translateY(-4px);
        }
        .tip-number {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
        }
        .tip-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
        }
        .tip-card p {
            color: var(--text-silver);
            font-size: 0.95rem;
            margin: 0;
        }

        /* Steps */
        .step-list {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .step-marker {
            width: 48px;
            height: 48px;
            min-width: 48px;
            background: linear-gradient(135deg, var(--accent-cyan), #0a8df1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: #000;
        }
        .step-content h4 {
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-content p {
            color: var(--text-silver);
            margin: 0;
        }

        /* Image Block */
        .image-feature {
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-dim);
            border: 1px solid rgba(0,240,255,0.15);
        }

        /* FAQ */
        .faq-section {
            background: rgba(15,12,32,0.4);
            border-radius: 28px;
            padding: 50px 40px;
            border: 1px solid rgba(255,255,255,0.05);
        }
        .accordion-custom .accordion-item {
            background: transparent;
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: 14px !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-custom .accordion-button {
            background: rgba(11,26,48,0.8);
            color: #fff;
            font-weight: 600;
            box-shadow: none;
            border-radius: 14px !important;
            padding: 18px 24px;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0,240,255,0.08);
            color: var(--accent-cyan);
        }
        .accordion-custom .accordion-body {
            background: rgba(11,26,48,0.5);
            color: var(--text-silver);
            padding: 20px 24px;
        }

        /* CTA */
        .cta-block {
            background: linear-gradient(135deg, rgba(0,240,255,0.1), rgba(204,255,0,0.05));
            border: 1px solid rgba(0,240,255,0.3);
            border-radius: 28px;
            padding: 50px 40px;
            text-align: center;
        }
        .btn-cta {
            background: linear-gradient(135deg, var(--accent-cyan), #0a8df1);
            color: #000;
            border: none;
            padding: 16px 40px;
            border-radius: var(--border-radius-btn);
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition-smooth);
            box-shadow: var(--shadow-dim);
        }
        .btn-cta:hover {
            box-shadow: var(--shadow-neon);
            transform: scale(1.04);
            background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 20px;
            bottom: 80px;
            z-index: 999;
            width: 54px;
            height: 54px;
            background: rgba(0,0,0,0.7);
            backdrop-filter: blur(10px);
            border-radius: 30px;
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(0,240,255,0.35);
            transition: var(--transition-smooth);
            animation: fabBreath 3s ease-in-out infinite;
        }
        .fab-support:hover {
            box-shadow: 0 0 28px rgba(0,240,255,0.7);
            border-color: var(--accent-cyan);
            transform: scale(1.08);
        }
        @keyframes fabBreath {
            0%,100% { box-shadow: 0 0 18px rgba(0,240,255,0.35); }
            50% { box-shadow: 0 0 28px rgba(0,240,255,0.65); }
        }
        .fab-badge {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: #ff0033;
            border-radius: 50%;
            border: 2px solid #0B1A30;
            animation: blink 1.2s infinite;
        }
        @keyframes blink {
            0%,100%{opacity:1;}
            50%{opacity:0.3;}
        }

        /* Footer */
        .site-footer {
            background: rgba(15, 12, 32, 0.9);
            border-top: 1px solid rgba(0,240,255,0.1);
            padding: 40px 0;
            margin-top: 60px;
        }
        .footer-links {
            display: flex;
            gap: 24px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }
        .footer-links a {
            color: var(--text-silver);
            font-weight: 500;
            font-size: 0.9rem;
        }
        .footer-links a:hover { color: var(--accent-cyan); }

        @media (max-width: 991px) {
            .nav-links, .nav-buttons {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 10px;
                align-items: flex-start;
                padding-top: 16px;
            }
            .nav-links.show, .nav-buttons.show {
                display: flex;
            }
            .mobile-toggle { display: block; }
            .navbar-custom { flex-wrap: wrap; }
            .hero-title { font-size: 2.3rem; }
        }
        @media (max-width: 767px) {
            .hero-title { font-size: 1.9rem; }
            .step-item { flex-direction: column; gap: 12px; }
            .faq-section, .cta-block { padding: 30px 20px; }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0B1A30;
            --bg-secondary: #0F0C20;
            --accent-cyan: #00F0FF;
            --accent-green: #CCFF00;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --shadow-neon: 0 0 15px rgba(0,240,255,0.5);
            --shadow-dim: 0 0 8px rgba(0,240,255,0.2);
            --border-radius-card: 16px;
            --border-radius-btn: 30px;
            --font-main: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        body {
            font-family: var(--font-main);
            background: linear-gradient(170deg, var(--bg-secondary) 0%, var(--bg-primary) 50%, #0C1D35 100%);
            color: var(--text-white);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { 
            color: var(--accent-cyan); 
            text-decoration: none; 
            transition: var(--transition-fast);
        }
        a:hover { color: var(--accent-green); text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container-custom { 
            max-width: 1240px; 
            margin: 0 auto; 
            padding: 0 24px; 
        }
        /* Navigation */
        .site-header {
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: var(--transition-smooth);
        }
        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
        }
        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
            transition: var(--transition-smooth);
        }
        .logo-text:hover {
            filter: brightness(1.3);
            transform: scale(1.03);
        }
        .logo-text i {
            -webkit-text-fill-color: var(--accent-cyan);
            margin-right: 6px;
            font-size: 1.3rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: var(--text-silver);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 4px;
            border-bottom: 2px solid transparent;
            transition: var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-white);
            border-bottom-color: var(--accent-cyan);
            text-shadow: 0 0 10px rgba(0,240,255,0.5);
        }
        .nav-links a.active {
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .nav-buttons { display: flex; align-items: center; gap: 14px; }
        .btn-nav-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.3);
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition-smooth);
            cursor: pointer;
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .btn-nav-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-dim);
        }
        .btn-nav-signup {
            background: linear-gradient(135deg, var(--accent-cyan), #0a8df1);
            color: #000;
            border: none;
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 700;
            cursor: pointer;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 4px 15px rgba(0,240,255,0.25);
        }
        .btn-nav-signup:hover {
            transform: scale(1.05);
            box-shadow: var(--shadow-neon);
            background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255,255,255,0.4);
            color: var(--text-white);
            font-size: 1.6rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition-fast);
        }
        .mobile-toggle:hover { border-color: var(--accent-cyan); }

        /* Page Banner */
        .page-banner {
            background: url('/assets/images/coverpic/cover-4.jpg') center center / cover no-repeat;
            background-blend-mode: overlay;
            background-color: rgba(11, 26, 48, 0.8);
            padding: 70px 0;
            position: relative;
            border-bottom: 1px solid rgba(0,240,255,0.2);
        }
        .banner-content {
            position: relative;
            z-index: 2;
        }
        .banner-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--text-white), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
        }
        .banner-content p {
            color: var(--text-silver);
            font-size: 1.15rem;
            max-width: 700px;
        }

        /* Section Titles */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 36px;
            color: var(--text-white);
            position: relative;
            padding-bottom: 14px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
            border-radius: 3px;
        }

        /* Steps / Timelines */
        .step-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .step-item {
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(0,240,255,0.12);
            border-radius: var(--border-radius-card);
            padding: 28px 32px;
            margin-bottom: 24px;
            display: flex;
            gap: 24px;
            align-items: flex-start;
            transition: var(--transition-smooth);
        }
        .step-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-dim);
        }
        .step-number {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            color: #000;
            font-weight: 800;
            font-size: 1.3rem;
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            flex-shrink: 0;
        }
        .step-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 6px;
        }
        .step-body p {
            color: var(--text-silver);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* Feature Cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--border-radius-card);
            padding: 32px 24px;
            text-align: left;
            transition: var(--transition-smooth);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-dim);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--text-silver);
            font-size: 0.95rem;
            margin: 0;
        }

        /* Warning Box */
        .warning-box {
            background: rgba(255, 69, 0, 0.1);
            border-left: 5px solid #ff4500;
            border-radius: 12px;
            padding: 24px 28px;
            margin: 40px 0;
            color: #ffaa80;
        }
        .warning-box h4 {
            color: #ff6347;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .warning-box p { margin: 0; }

        /* FAQ */
        .faq-section {
            background: rgba(15, 12, 32, 0.5);
            border-radius: var(--border-radius-card);
            padding: 40px 32px;
            margin-top: 40px;
        }
        .accordion-item {
            background: transparent;
            border: 1px solid rgba(255,255,255,0.08);
            margin-bottom: 12px;
            border-radius: 12px !important;
        }
        .accordion-button {
            background: transparent !important;
            color: var(--text-white) !important;
            font-weight: 600;
            box-shadow: none !important;
            border-radius: 12px !important;
            padding: 18px 24px;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(0,240,255,0.08) !important;
            color: var(--accent-cyan) !important;
        }
        .accordion-button::after {
            filter: invert(1);
        }
        .accordion-body {
            color: var(--text-silver);
            padding: 18px 24px;
        }

        /* CTA */
        .cta-block {
            background: linear-gradient(135deg, rgba(0,240,255,0.1), rgba(204,255,0,0.05));
            border: 1px solid rgba(0,240,255,0.25);
            border-radius: var(--border-radius-card);
            padding: 48px 32px;
            text-align: center;
            margin: 60px 0 40px;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
        }
        .cta-block .btn-cta {
            background: linear-gradient(135deg, var(--accent-cyan), #0a8df1);
            color: #000;
            border: none;
            padding: 14px 36px;
            border-radius: var(--border-radius-btn);
            font-weight: 700;
            font-size: 1.1rem;
            margin-top: 20px;
            transition: var(--transition-smooth);
            box-shadow: var(--shadow-neon);
        }
        .cta-block .btn-cta:hover {
            transform: scale(1.05);
            background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
        }

        /* Footer */
        .site-footer {
            background: rgba(15, 12, 32, 0.95);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 32px 0;
            margin-top: 50px;
        }
        .footer-links {
            margin-bottom: 16px;
            display: flex;
            gap: 24px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .footer-links a {
            color: var(--text-silver);
            font-weight: 500;
        }
        .footer-links a:hover { color: var(--accent-cyan); }
        .text-silver { color: var(--text-silver); }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 80px;
            z-index: 1100;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(12px);
            border: 2px solid var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px rgba(0,240,255,0.6);
            transition: var(--transition-smooth);
            cursor: pointer;
        }
        .fab-left:hover {
            transform: scale(1.15);
            box-shadow: 0 0 30px rgba(0,240,255,0.9);
            border-color: var(--accent-green);
        }
        .fab-left i {
            color: var(--accent-cyan);
            font-size: 1.6rem;
        }

        @media (max-width: 1024px) {
            .banner-content h1 { font-size: 2.2rem; }
        }
        @media (max-width: 768px) {
            .navbar-custom { flex-wrap: wrap; }
            .nav-links, .nav-buttons { display: none; width: 100%; flex-direction: column; gap: 10px; align-items: flex-start; padding-top: 16px; }
            .nav-links.show, .nav-buttons.show { display: flex; }
            .mobile-toggle { display: block; }
            .banner-content h1 { font-size: 1.8rem; }
            .step-item { flex-direction: column; }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0B1A30;
            --bg-secondary: #0F0C20;
            --accent-cyan: #00F0FF;
            --accent-green: #CCFF00;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --shadow-neon: 0 0 15px rgba(0,240,255,0.5);
            --shadow-dim: 0 0 8px rgba(0,240,255,0.2);
            --border-radius-card: 16px;
            --border-radius-btn: 30px;
            --font-main: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        body {
            font-family: var(--font-main);
            background: linear-gradient(170deg, var(--bg-secondary) 0%, var(--bg-primary) 50%, #0C1D35 100%);
            color: var(--text-white);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--accent-cyan); text-decoration: none; transition: var(--transition-fast); }
        a:hover { color: var(--accent-green); text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container-custom { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

        /* Navigation */
        .site-header {
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: var(--transition-smooth);
        }
        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
        }
        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
            transition: var(--transition-smooth);
        }
        .logo-text:hover { filter: brightness(1.3); transform: scale(1.03); }
        .logo-text i { -webkit-text-fill-color: var(--accent-cyan); margin-right: 6px; font-size: 1.3rem; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: var(--text-silver);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 4px;
            border-bottom: 2px solid transparent;
            transition: var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-white);
            border-bottom-color: var(--accent-cyan);
            text-shadow: 0 0 10px rgba(0,240,255,0.5);
        }
        .nav-links a.active { color: var(--accent-cyan); font-weight: 700; }
        .nav-buttons { display: flex; align-items: center; gap: 14px; }
        .btn-nav-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.3);
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition-smooth);
            cursor: pointer;
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .btn-nav-login:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); box-shadow: var(--shadow-dim); }
        .btn-nav-signup {
            background: linear-gradient(135deg, var(--accent-cyan), #0a8df1);
            color: #000;
            border: none;
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 700;
            cursor: pointer;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 4px 15px rgba(0,240,255,0.25);
        }
        .btn-nav-signup:hover { transform: scale(1.05); box-shadow: var(--shadow-neon); background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan)); }
        .mobile-toggle { display: none; background: none; border: 2px solid rgba(255,255,255,0.4); color: var(--text-white); font-size: 1.6rem; padding: 6px 14px; border-radius: 8px; cursor: pointer; transition: var(--transition-fast); }
        .mobile-toggle:hover { border-color: var(--accent-cyan); }

        @media (max-width: 992px) {
            .nav-links, .nav-buttons {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 10px;
                align-items: flex-start;
                padding-top: 16px;
            }
            .nav-links.show, .nav-buttons.show { display: flex; }
            .mobile-toggle { display: block; }
            .navbar-custom { flex-wrap: wrap; }
            .nav-links a { border-bottom: none; padding: 6px 0; }
        }

        /* Hero */
        .hero-section {
            background: url('/assets/images/backpic/back-2.jpg') center center / cover no-repeat;
            background-blend-mode: overlay;
            background-color: rgba(11, 26, 48, 0.85);
            perspective: 800px;
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-overlay { position: absolute; inset: 0; background: radial-gradient(circle at 30% 50%, rgba(0,240,255,0.15) 0%, transparent 70%); }
        .hero-content { position: relative; z-index: 2; padding: 70px 0; }
        .hero-badge { background: rgba(255,0,0,0.85); display: inline-block; padding: 8px 20px; border-radius: 20px; font-weight: 700; font-size: 0.85rem; letter-spacing: 0.5px; }
        .hero-title { font-size: 3rem; font-weight: 800; line-height: 1.2; margin: 20px 0; }
        .hero-desc { font-size: 1.15rem; color: var(--text-silver); max-width: 680px; margin-bottom: 24px; }
        .btn-hero { padding: 14px 36px; border-radius: 30px; font-weight: 700; font-size: 1rem; cursor: pointer; transition: var(--transition-smooth); display: inline-block; }
        .btn-hero-primary { background: linear-gradient(135deg, var(--accent-cyan), #0a8df1); color: #000; border: none; box-shadow: 0 4px 15px rgba(0,240,255,0.3); margin-right: 12px; }
        .btn-hero-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-neon); }
        .btn-hero-outline { background: transparent; border: 2px solid var(--accent-cyan); color: var(--accent-cyan); }
        .btn-hero-outline:hover { background: rgba(0,240,255,0.1); }
        .trust-strip { display: flex; align-items: center; gap: 24px; margin-top: 28px; color: var(--text-silver); font-size: 0.9rem; flex-wrap: wrap; }

        @media (max-width: 768px) {
            .hero-title { font-size: 2.2rem; }
            .hero-section { min-height: 450px; }
        }

        /* Cards */
        .glass-card {
            background: rgba(255,255,255,0.04);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(0,240,255,0.12);
            border-radius: var(--border-radius-card);
            transition: var(--transition-smooth);
        }
        .glass-card:hover {
            border-color: rgba(0,240,255,0.4);
            box-shadow: 0 8px 25px rgba(0,0,0,0.3), 0 0 12px rgba(0,240,255,0.2);
            transform: translateY(-4px);
            background: rgba(255,255,255,0.06);
        }
        .review-card { padding: 28px; height: 100%; display: flex; flex-direction: column; }
        .rating-stars { color: #FFD700; letter-spacing: 2px; margin-bottom: 12px; }
        .feature-tag { background: rgba(0,240,255,0.15); color: var(--accent-cyan); padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; display: inline-block; margin-right: 6px; margin-bottom: 6px; }

        /* Table */
        .compare-table { background: rgba(255,255,255,0.03); border-radius: var(--border-radius-card); overflow: hidden; }
        .compare-table th { background: rgba(0,240,255,0.1); font-weight: 700; color: var(--accent-cyan); padding: 18px 16px; border-bottom: 1px solid rgba(255,255,255,0.1); }
        .compare-table td { padding: 16px; color: var(--text-silver); border-bottom: 1px solid rgba(255,255,255,0.05); vertical-align: middle; }

        /* Progress bar */
        .progress-custom { height: 8px; background: rgba(255,255,255,0.08); border-radius: 10px; overflow: hidden; }
        .progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green)); border-radius: 10px; width: 0%; }

        /* Footer */
        .site-footer { background: rgba(15, 12, 32, 0.9); border-top: 1px solid rgba(0,240,255,0.1); padding: 40px 0 25px; margin-top: 70px; }
        .footer-links { display: flex; justify-content: center; gap: 30px; flex-wrap: wrap; margin-bottom: 20px; }
        .footer-links a { color: var(--text-silver); font-weight: 500; }
        .footer-links a:hover { color: var(--accent-cyan); }