/* roulang page: index */
:root {
            --primary-green: #0A2E1C;
            --secondary-green: #123E25;
            --accent-gold: #FFD700;
            --accent-red: #D32F2F;
            --text-white: #FFFFFF;
            --text-mint: #D1F2EB;
            --bg-deep-green: #0A2E1C;
            --bg-forest: #123E25;
            --border-gold: #FFD700;
            --shadow-gold: rgba(255, 215, 0, 0.3);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 50px;
            --font-main: 'Segoe UI', 'Roboto', system-ui, -apple-system, sans-serif;
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.15);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.25);
            --shadow-glow: 0 4px 20px var(--shadow-gold);
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: var(--font-main);
            background-color: var(--bg-deep-green);
            color: var(--text-white);
            line-height: 1.6;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 15px;
            padding-right: 15px;
        }

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

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

        /* Navigation */
        .main-header {
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.35);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 12px 0;
        }

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

        .logo-text {
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--accent-gold);
            letter-spacing: -0.3px;
            line-height: 1.3;
            max-width: 280px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 1.75rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            font-weight: 500;
            color: var(--text-mint);
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            font-size: 0.95rem;
        }

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

        .auth-btns {
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-gold);
            color: var(--accent-gold);
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 0.9rem;
        }

        .btn-login:hover {
            background: rgba(255,215,0,0.12);
        }

        .btn-signup {
            background: var(--accent-gold);
            color: var(--primary-green);
            border: none;
            padding: 8px 22px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 0.9rem;
        }

        .btn-signup:hover {
            background: #FFC107;
            box-shadow: var(--shadow-glow);
        }

        /* Mobile menu toggle hidden by default */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--accent-gold);
            font-size: 1.6rem;
            cursor: pointer;
        }

        /* Hero Video Section */
        .hero-video {
            position: relative;
            width: 100%;
            min-height: 550px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10,46,28,0.8) 0%, rgba(10,46,28,0.7) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            margin: 0 auto;
            padding: 40px 20px;
        }

        .hero-play-btn {
            display: inline-block;
            width: 80px;
            height: 80px;
            background: var(--accent-gold);
            border-radius: 50%;
            color: var(--primary-green);
            font-size: 2.2rem;
            line-height: 80px;
            margin-bottom: 24px;
            box-shadow: 0 0 28px rgba(255,215,0,0.6);
            cursor: pointer;
            transition: transform 0.2s;
        }

        .hero-play-btn:hover {
            transform: scale(1.06);
        }

        .hero-content h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin-bottom: 18px;
            line-height: 1.3;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-mint);
            margin-bottom: 30px;
            max-width: 650px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary-gold {
            background: var(--accent-gold);
            color: var(--primary-green);
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            border: none;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .btn-primary-gold:hover {
            background: #FFC107;
            box-shadow: 0 6px 20px rgba(255,215,0,0.5);
        }

        .btn-outline-gold {
            background: transparent;
            border: 2px solid var(--accent-gold);
            color: var(--accent-gold);
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .btn-outline-gold:hover {
            background: rgba(255,215,0,0.15);
        }

        /* Sections spacing */
        section {
            padding: 70px 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin-bottom: 12px;
            text-align: left;
        }

        .section-sub {
            color: var(--text-mint);
            margin-bottom: 36px;
            font-size: 1.05rem;
            max-width: 700px;
        }

        /* Content Calendar Grid */
        .calendar-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px,1fr));
            gap: 24px;
            margin-top: 20px;
        }

        .cal-card {
            background: var(--secondary-green);
            border: 1px solid rgba(255,215,0,0.25);
            border-radius: var(--radius-card);
            padding: 24px;
            transition: var(--transition-base);
        }

        .cal-card:hover {
            border-color: var(--accent-gold);
            box-shadow: 0 8px 20px rgba(0,0,0,0.3);
        }

        .cal-icon {
            font-size: 2rem;
            color: var(--accent-gold);
            margin-bottom: 12px;
        }

        .cal-card h3 {
            font-size: 1.2rem;
            color: var(--accent-gold);
            margin-bottom: 8px;
        }

        /* Hot Topics */
        .hot-topics-wrap {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }

        .topic-card {
            flex: 1 1 280px;
            background: var(--secondary-green);
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid rgba(255,215,0,0.2);
            transition: var(--transition-base);
        }

        .topic-card:hover {
            border-color: var(--accent-gold);
        }

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

        .topic-body {
            padding: 18px;
        }

        .topic-body h4 {
            color: var(--accent-gold);
            margin-bottom: 6px;
        }

        /* Data Dashboard */
        .dashboard-row {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
            justify-content: space-between;
            background: var(--secondary-green);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            border: 1px solid rgba(255,215,0,0.3);
        }

        .stat-item {
            text-align: center;
            flex: 1;
            min-width: 140px;
        }

        .stat-number {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--accent-gold);
        }

        /* Quick Answers Accordion */
        .accordion-faq .accordion-item {
            background: var(--secondary-green);
            border: 1px solid rgba(255,215,0,0.2);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            overflow: hidden;
        }

        .accordion-header {
            background: transparent;
            color: var(--accent-gold);
            padding: 16px 20px;
            font-weight: 600;
            cursor: pointer;
            width: 100%;
            text-align: left;
            border: none;
            font-size: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .accordion-body {
            padding: 0 20px 18px;
            color: var(--text-mint);
            display: none;
        }

        .accordion-item.active .accordion-body {
            display: block;
        }

        /* Guarantee Badges */
        .badge-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            justify-content: center;
            background: var(--secondary-green);
            border-radius: var(--radius-card);
            padding: 32px 20px;
            border: 1px solid rgba(255,215,0,0.25);
        }

        .badge-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-mint);
            font-weight: 500;
        }

        .badge-item i {
            font-size: 1.8rem;
            color: var(--accent-gold);
        }

        /* Product Screenshot Stage */
        .screenshot-stage {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding-bottom: 16px;
            scroll-snap-type: x mandatory;
        }

        .screen-card {
            flex: 0 0 260px;
            background: var(--secondary-green);
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid rgba(255,215,0,0.25);
            scroll-snap-align: start;
        }

        .screen-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .screen-label {
            padding: 12px;
            color: var(--accent-gold);
            font-weight: 600;
        }

        /* Media Spotlight Scroll */
        .media-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding-bottom: 12px;
        }

        .media-card {
            flex: 0 0 260px;
            background: var(--secondary-green);
            border-radius: var(--radius-card);
            padding: 16px;
            border: 1px solid rgba(255,215,0,0.2);
        }

        /* News list */
        .news-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            gap: 14px;
        }

        .news-item a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--secondary-green);
            padding: 14px 18px;
            border-radius: 8px;
            color: var(--text-mint);
            border-left: 4px solid var(--accent-gold);
            transition: var(--transition-base);
        }

        .news-item a:hover {
            background: #1A4A2E;
            color: #fff;
        }

        /* Footer */
        .main-footer {
            background: #061F13;
            padding: 40px 0 20px;
            border-top: 2px solid var(--accent-gold);
            color: var(--text-mint);
        }

        .footer-cols {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
            gap: 28px;
            margin-bottom: 28px;
        }

        .footer-cols h5 {
            color: var(--accent-gold);
            margin-bottom: 12px;
        }

        .footer-bottom {
            text-align: center;
            font-size: 0.85rem;
            border-top: 1px solid rgba(255,215,0,0.3);
            padding-top: 18px;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: radial-gradient(circle at 30% 30%, #B8860B, #8B6508);
            border-radius: 50%;
            box-shadow: 0 4px 20px rgba(255,215,0,0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-white);
            font-size: 1.6rem;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
            animation: floatFab 3s infinite ease-in-out;
        }

        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 6px 28px rgba(255,215,0,0.7);
        }

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

        /* Responsive */
        @media screen and (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--primary-green);
                padding: 12px;
                margin-top: 10px;
            }

            .nav-links.show {
                display: flex;
            }

            .mobile-toggle {
                display: block;
            }

            .hero-content h1 {
                font-size: 1.8rem;
            }

            .auth-btns {
                margin-left: auto;
            }
        }

/* roulang page: category1 */
/* :root Design Variables - Style G: Volcanic Magma & Obsidian */
        :root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --bg-card: #1C1C1C;
            --accent-orange: #FF4500;
            --accent-red: #FF0000;
            --accent-gold: #FF8C00;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --text-muted: #999999;
            --border-color: #333333;
            --border-glow: rgba(255,69,0,0.4);
            --shadow-card: 0 8px 32px rgba(0,0,0,0.6);
            --shadow-glow: 0 0 20px rgba(255,69,0,0.3);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 18px;
            --transition-base: all 0.25s ease-in-out;
            --font-heading: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --font-body: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 2.5rem;
            --spacing-xl: 4rem;
            --spacing-2xl: 6rem;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        a:hover,
        a:focus {
            color: var(--accent-gold);
            text-decoration: underline;
        }

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

        h1 { font-size: 2.5rem; margin-bottom: var(--spacing-md); }
        h2 { font-size: 2rem; margin-bottom: var(--spacing-sm); }
        h3 { font-size: 1.5rem; margin-bottom: var(--spacing-xs); }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: var(--spacing-md);
            padding-right: var(--spacing-md);
        }

        /* --- Header & Navigation --- */
        .main-header {
            background: rgba(22,22,22,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 2px solid var(--accent-orange);
            position: sticky;
            top: 0;
            z-index: 999;
            box-shadow: 0 2px 20px rgba(255,69,0,0.2);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: var(--spacing-xs);
            padding-bottom: var(--spacing-xs);
            min-height: 64px;
        }

        .logo-text {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .logo-text:hover {
            color: var(--accent-orange);
            text-decoration: none;
        }

        .nav-links {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 1.8rem;
            align-items: center;
        }

        .nav-links a {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
            transition: var(--transition-base);
        }
        .nav-links a:hover,
        .nav-links a:focus {
            color: var(--accent-orange);
            text-decoration: none;
            border-bottom-color: var(--accent-orange);
        }
        .nav-links a.active {
            color: var(--accent-orange);
            border-bottom-color: var(--accent-orange);
        }

        .auth-btns {
            display: flex;
            gap: 0.6rem;
            align-items: center;
        }

        .btn-login {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 0.9rem;
        }
        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
            background: rgba(255,69,0,0.08);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
            color: #fff;
            border: none;
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(255,69,0,0.35);
        }
        .btn-signup:hover {
            box-shadow: 0 6px 25px rgba(255,69,0,0.6);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.3rem;
        }

        /* --- Hero Section --- */
        .hero-category {
            background: linear-gradient(180deg, #0D0D0D 0%, var(--bg-primary) 100%);
            padding: var(--spacing-2xl) 0 var(--spacing-xl);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .hero-category::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(255,69,0,0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255,69,0,0.12);
            color: var(--accent-orange);
            padding: 0.3rem 0.9rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.4px;
            border: 1px solid rgba(255,69,0,0.25);
            margin-bottom: var(--spacing-sm);
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: var(--spacing-sm);
            background: linear-gradient(135deg, #fff 0%, var(--accent-gold) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            color: var(--text-secondary);
            font-size: 1.15rem;
            margin-bottom: var(--spacing-lg);
        }

        .hero-cta-group {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, #FF4500, #FF0000);
            color: #fff;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-md);
            font-weight: 800;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 6px 25px rgba(255,69,0,0.45);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-primary:hover {
            box-shadow: 0 10px 35px rgba(255,69,0,0.7);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-color);
            padding: 0.7rem 1.8rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .btn-outline:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }

        .hero-image-wrap {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-color);
        }
        .hero-image-wrap img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        /* --- Value Props Section --- */
        .value-props-section {
            padding: var(--spacing-2xl) 0;
            background: var(--bg-secondary);
        }

        .section-label {
            text-transform: uppercase;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--accent-orange);
            margin-bottom: 0.5rem;
            display: block;
        }

        .section-heading {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: var(--spacing-lg);
        }

        .props-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }

        .prop-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            transition: var(--transition-base);
            position: relative;
        }
        .prop-card:hover {
            border-color: var(--accent-orange);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .prop-icon {
            font-size: 2.4rem;
            color: var(--accent-orange);
            margin-bottom: var(--spacing-sm);
        }
        .prop-card h3 {
            font-size: 1.35rem;
            margin-bottom: 0.5rem;
        }
        .prop-card p {
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* --- Steps / Process Section --- */
        .steps-section {
            padding: var(--spacing-2xl) 0;
            background: var(--bg-primary);
        }

        .steps-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-lg);
            margin-top: var(--spacing-lg);
        }

        .step-item {
            display: grid;
            grid-template-columns: 60px 1fr;
            gap: var(--spacing-md);
            align-items: start;
            background: var(--bg-card);
            padding: var(--spacing-lg);
            border-radius: var(--radius-lg);
            border-left: 4px solid var(--accent-orange);
            transition: var(--transition-base);
        }
        .step-item:hover {
            box-shadow: var(--shadow-glow);
            border-left-color: var(--accent-red);
        }

        .step-number {
            background: var(--accent-orange);
            color: #fff;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.4rem;
        }
        .step-content h3 {
            margin-bottom: 0.3rem;
        }
        .step-content p {
            color: var(--text-secondary);
        }

        /* --- Features Grid --- */
        .features-section {
            padding: var(--spacing-2xl) 0;
            background: var(--bg-secondary);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
            margin-top: var(--spacing-lg);
        }

        .feature-box {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            display: flex;
            gap: var(--spacing-md);
            transition: var(--transition-base);
        }
        .feature-box:hover {
            border-color: var(--accent-orange);
        }
        .feature-icon {
            font-size: 2rem;
            color: var(--accent-orange);
            flex-shrink: 0;
        }

        /* --- FAQ Section --- */
        .faq-section {
            padding: var(--spacing-2xl) 0;
            background: var(--bg-primary);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            margin-top: var(--spacing-lg);
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: var(--spacing-md) var(--spacing-lg);
            color: var(--text-primary);
            font-weight: 700;
            font-size: 1.05rem;
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition-base);
        }
        .faq-question:hover {
            background: rgba(255,69,0,0.05);
        }
        .faq-answer {
            padding: 0 var(--spacing-lg) var(--spacing-md);
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* --- CTA Section --- */
        .cta-section {
            padding: var(--spacing-2xl) 0;
            background: linear-gradient(135deg, #1A0A02 0%, #0B0B0B 100%);
            text-align: center;
            border-top: 2px solid var(--accent-orange);
            border-bottom: 2px solid var(--accent-orange);
        }
        .cta-section h2 {
            font-size: 2.2rem;
        }
        .cta-section p {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto var(--spacing-lg);
        }

        /* --- Footer --- */
        .main-footer {
            background: var(--bg-secondary);
            border-top: 2px solid var(--border-color);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .footer-cols {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        .footer-cols h5 {
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            font-size: 1rem;
        }
        .footer-cols a {
            color: var(--text-muted);
            display: inline-block;
            margin-bottom: 0.3rem;
        }
        .footer-cols a:hover {
            color: var(--accent-orange);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: var(--spacing-md);
            text-align: center;
            font-size: 0.8rem;
        }

        /* FAB - Style G: Volcanic Magma & Obsidian -> Option 2: Cyber & Neon */
        .fab-left {
            position: fixed;
            left: 1.2rem;
            bottom: 4.5rem;
            z-index: 50;
            background: rgba(11,11,11,0.65);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #FF4500, #FF0000) 1;
            border-radius: 50px;
            padding: 0.65rem 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 0 18px rgba(255,69,0,0.5);
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
        }
        .fab-left:hover {
            box-shadow: 0 0 35px rgba(255,0,0,0.7);
            transform: scale(1.05);
        }
        .fab-left i {
            font-size: 1.4rem;
            color: var(--accent-orange);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; }
            .hero-image-wrap { max-width: 500px; margin: 0 auto; }
            .props-grid { grid-template-columns: repeat(2, 1fr); }
            .features-grid { grid-template-columns: 1fr; }
        }

        @media (max-width: 768px) {
            .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--bg-secondary); flex-direction: column; padding: 1rem; gap: 0.8rem; border-bottom: 2px solid var(--accent-orange); }
            .nav-links.show { display: flex; }
            .mobile-toggle { display: block; }
            .auth-btns { margin-left: auto; margin-right: 1rem; }
            h1 { font-size: 2rem; }
            .hero-title { font-size: 2rem; }
            .section-heading { font-size: 1.8rem; }
            .props-grid { grid-template-columns: 1fr; }
            .footer-cols { grid-template-columns: 1fr; }
            .step-item { grid-template-columns: 1fr; text-align: center; }
            .step-number { margin: 0 auto; }
        }

        @media (max-width: 520px) {
            .hero-cta-group { flex-direction: column; align-items: stretch; }
            .btn-primary, .btn-outline { text-align: center; justify-content: center; }
            .auth-btns { gap: 0.3rem; }
            .btn-login, .btn-signup { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
        }

/* roulang page: article */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --card-bg: #131829;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-glow: rgba(0,240,255,0.25);
            --border-neon: #0052FF;
            --shadow-neon: 0 0 18px rgba(0,82,255,0.35);
            --shadow-cyan: 0 0 22px rgba(0,240,255,0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 1.75rem;
            --space-lg: 3rem;
            --space-xl: 5rem;
            --transition-fast: 0.2s cubic-bezier(0.4,0,0.2,1);
            --transition-smooth: 0.35s cubic-bezier(0.4,0,0.2,1);
            --font-heading: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --font-body: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --line-height-body: 1.65;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

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

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

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

        button {
            font-family: var(--font-body);
            cursor: pointer;
            border: none;
            transition: all var(--transition-fast);
        }

        /* Container */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header / Navigation */
        .main-header {
            background: rgba(13,17,30,0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0,240,255,0.2);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0.75rem 0;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .logo-text {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text-white);
            letter-spacing: -0.3px;
            white-space: nowrap;
            background: linear-gradient(135deg, #00F0FF 0%, #0052FF 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            list-style: none;
            display: flex;
            gap: 1.5rem;
            align-items: center;
        }

        .nav-links a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-silver);
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
            transition: all var(--transition-fast);
        }

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

        .auth-btns {
            display: flex;
            gap: 0.75rem;
            align-items: center;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.4);
            padding: 0.5rem 1.25rem;
            border-radius: 999px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

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

        .btn-signup {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #fff;
            padding: 0.5rem 1.4rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: var(--shadow-neon);
        }

        .btn-signup:hover {
            box-shadow: var(--shadow-cyan);
            transform: translateY(-2px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 1.6rem;
            border: none;
        }

        /* Article Hero */
        .article-hero {
            background: linear-gradient(180deg, #0D111E 0%, #08090F 100%);
            padding: 3.5rem 0 2rem;
            border-bottom: 1px solid rgba(0,82,255,0.4);
            position: relative;
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0,240,255,0.12) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 0;
        }

        .article-hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
        }

        .article-hero-text h1 {
            font-family: var(--font-heading);
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.25;
            margin-bottom: 1rem;
            background: linear-gradient(to right, #FFFFFF, #CBD5E1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-meta {
            display: flex;
            gap: 1.5rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 1.2rem;
            flex-wrap: wrap;
        }

        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }

        .category-tag {
            background: rgba(0,240,255,0.15);
            color: var(--accent-cyan);
            padding: 0.3rem 0.9rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.8rem;
            display: inline-block;
            margin-bottom: 1rem;
        }

        .hero-cover {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-cyan);
            border: 1px solid var(--border-glow);
        }

        /* Main Article Body */
        .article-main {
            padding: 3rem 0 2.5rem;
        }

        .article-layout {
            max-width: 860px;
            margin: 0 auto;
            background: var(--card-bg);
            border-radius: var(--radius-xl);
            padding: 2.5rem 2.8rem;
            box-shadow: 0 8px 32px rgba(0,0,0,0.5);
            border: 1px solid rgba(0,82,255,0.18);
        }

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

        .article-body-content h2 {
            font-family: var(--font-heading);
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 2.2rem 0 1rem;
            border-left: 4px solid var(--accent-cyan);
            padding-left: 1rem;
        }

        .article-body-content h3 {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 650;
            color: #E2E8F0;
            margin: 1.6rem 0 0.7rem;
        }

        .article-body-content p {
            margin-bottom: 1.1rem;
        }

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

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

        .article-body-content img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            box-shadow: 0 4px 16px rgba(0,0,0,0.4);
        }

        .not-found-state {
            text-align: center;
            padding: 3rem 1rem;
        }

        .not-found-state i {
            font-size: 2.8rem;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }

        .not-found-state p {
            font-size: 1.15rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }

        .btn-back {
            display: inline-block;
            background: var(--accent-blue);
            color: #fff;
            padding: 0.7rem 2rem;
            border-radius: 999px;
            font-weight: 600;
            transition: all var(--transition-fast);
        }

        .btn-back:hover {
            background: var(--accent-cyan);
            color: #000;
            box-shadow: var(--shadow-cyan);
        }

        /* Related CTA */
        .cta-block {
            background: linear-gradient(135deg, #0D111E, #131829);
            border: 1px solid rgba(0,240,255,0.2);
            border-radius: var(--radius-lg);
            padding: 2rem 2.5rem;
            margin-top: 2.8rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1.5rem;
        }

        .cta-text h4 {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
        }

        .cta-text p {
            color: var(--text-silver);
            margin: 0.3rem 0 0;
        }

        .btn-cta-glow {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #000;
            font-weight: 700;
            padding: 0.8rem 2rem;
            border-radius: 999px;
            box-shadow: var(--shadow-neon);
            transition: all 0.3s;
        }

        .btn-cta-glow:hover {
            box-shadow: var(--shadow-cyan);
            transform: scale(1.04);
        }

        /* Footer */
        .main-footer {
            background: #0A0C16;
            border-top: 1px solid rgba(0,82,255,0.3);
            padding: 3rem 0 1.8rem;
            margin-top: 3.5rem;
            color: var(--text-muted);
        }

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

        .footer-cols h5 {
            font-family: var(--font-heading);
            color: var(--text-white);
            font-weight: 600;
            margin-bottom: 0.8rem;
        }

        .footer-cols a {
            color: var(--text-silver);
            display: inline-block;
            margin-bottom: 0.35rem;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 24px;
            z-index: 90;
            width: 52px;
            height: 52px;
            border-radius: 999px;
            background: rgba(0,0,0,0.65);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 18px rgba(0,240,255,0.5);
            transition: all 0.3s;
            cursor: pointer;
            animation: fabPulse 2.4s infinite;
        }

        .fab-left::before {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 999px;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            z-index: -1;
            opacity: 0.85;
        }

        .fab-left i {
            font-size: 1.5rem;
            color: #fff;
        }

        .fab-left:hover {
            transform: scale(1.12);
            box-shadow: 0 0 28px rgba(0,240,255,0.8);
        }

        @keyframes fabPulse {
            0% { opacity: 0.7; }
            50% { opacity: 1; }
            100% { opacity: 0.7; }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-hero-content {
                grid-template-columns: 1fr;
            }
            .hero-cover {
                max-width: 480px;
                margin: 0 auto;
            }
            .article-layout {
                padding: 2rem 1.6rem;
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0D111E;
                border-radius: var(--radius-md);
                padding: 1rem;
                margin-top: 0.5rem;
            }
            .nav-links.show {
                display: flex;
            }
            .auth-btns {
                margin-left: auto;
            }
            .footer-cols {
                grid-template-columns: 1fr;
            }
            .article-hero-text h1 {
                font-size: 1.9rem;
            }
            .cta-block {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0B1A30;
            --bg-secondary: #0F0C20;
            --bg-card: #132742;
            --accent-cyan: #00F0FF;
            --accent-lime: #CCFF00;
            --accent-danger: #FF3366;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #6B7280;
            --border-color: #1E3A5F;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
            --shadow-glow: 0 0 15px rgba(0,240,255,0.5);
            --shadow-glow-lime: 0 0 12px rgba(204,255,0,0.4);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        button, .btn {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
            transition: var(--transition-smooth);
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header & Navigation */
        .main-header {
            background: rgba(15, 12, 32, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            flex-wrap: wrap;
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.3px;
            white-space: nowrap;
            text-shadow: 0 0 8px rgba(0,240,255,0.4);
            flex-shrink: 0;
        }

        .logo-text:hover {
            color: var(--accent-lime);
            text-shadow: 0 0 12px rgba(204,255,0,0.6);
        }

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

        .nav-links a {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 6px 0;
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--accent-cyan);
        }

        .nav-links a.active {
            color: var(--accent-lime);
            font-weight: 600;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-lime);
            border-radius: 2px;
            box-shadow: var(--shadow-glow-lime);
        }

        .auth-btns {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-shrink: 0;
        }

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid var(--border-color);
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), #0099FF);
            color: #0B1A30;
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: var(--shadow-glow);
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-lime), #88CC00);
            color: #0B1A30;
            box-shadow: var(--shadow-glow-lime);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 4px 8px;
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 16px;
                font-size: 0.9rem;
            }
            .logo-text {
                font-size: 1.1rem;
            }
        }

        @media (max-width: 768px) {
            .nav-wrapper {
                flex-wrap: nowrap;
            }
            .mobile-toggle {
                display: block;
                order: 3;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(15, 12, 32, 0.98);
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                padding: 20px;
                gap: 16px;
                border-bottom: 2px solid var(--border-color);
                box-shadow: var(--shadow-md);
                z-index: 999;
            }
            .nav-links.show {
                display: flex;
            }
            .auth-btns {
                margin-left: auto;
                margin-right: 12px;
                order: 2;
            }
            .auth-btns .btn-login,
            .auth-btns .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }

        /* Hero Section - Crowdfunding Style */
        .hero-section {
            padding: 50px 20px 40px;
            text-align: left;
            background: linear-gradient(135deg, #0F0C20 0%, #0B1A30 100%);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -15%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0,240,255,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            max-width: 1280px;
            margin: 0 auto;
        }

        .hero-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .hero-content h1 span {
            color: var(--accent-lime);
            display: inline-block;
        }

        .hero-content .subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
            line-height: 1.6;
        }

        .progress-ring-container {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .progress-ring {
            width: 120px;
            height: 120px;
            position: relative;
        }

        .ring-svg {
            transform: rotate(-90deg);
        }

        .ring-bg {
            fill: none;
            stroke: var(--border-color);
            stroke-width: 8;
        }

        .ring-fill {
            fill: none;
            stroke: var(--accent-cyan);
            stroke-width: 8;
            stroke-linecap: round;
            filter: drop-shadow(0 0 6px rgba(0,240,255,0.7));
            transition: stroke-dashoffset 1s ease;
        }

        .ring-text {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-lime);
            text-shadow: 0 0 10px rgba(204,255,0,0.5);
        }

        .stats-mini {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .stat-item {
            font-size: 0.95rem;
            color: var(--text-secondary);
        }

        .stat-item strong {
            color: var(--accent-cyan);
            font-size: 1.2rem;
        }

        .tier-previews {
            display: flex;
            gap: 16px;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .tier-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            flex: 1;
            min-width: 120px;
            transition: var(--transition-smooth);
            cursor: default;
        }

        .tier-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        .tier-card h4 {
            font-size: 0.9rem;
            color: var(--accent-lime);
            margin-bottom: 4px;
            font-weight: 700;
        }

        .tier-card p {
            font-size: 0.8rem;
            color: var(--text-secondary);
            margin: 0;
        }

        .btn-hero {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-lime), #88CC00);
            color: #0B1A30;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: var(--shadow-glow-lime);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .btn-hero:hover {
            background: linear-gradient(135deg, var(--accent-cyan), #0099FF);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-visual img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: 0 0 30px rgba(0,240,255,0.25);
            border: 2px solid var(--border-color);
        }

        @media (max-width: 768px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .hero-content h1 {
                font-size: 1.9rem;
            }
            .hero-visual {
                order: -1;
            }
            .tier-previews {
                flex-direction: column;
            }
        }

        /* Sections General */
        .section {
            padding: 50px 20px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
            text-align: left;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
            text-align: left;
        }

        /* Error Cards */
        .error-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 24px;
        }

        .error-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .error-card:hover {
            border-color: var(--accent-danger);
            box-shadow: 0 0 18px rgba(255,51,102,0.35);
            transform: translateY(-3px);
        }

        .error-icon {
            font-size: 2.2rem;
            color: var(--accent-danger);
            margin-bottom: 12px;
        }

        .error-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .error-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin: 0;
        }

        .error-tag {
            display: inline-block;
            background: rgba(255,51,102,0.15);
            color: var(--accent-danger);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
        }

        /* Step-by-step */
        .step-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: 24px;
        }

        .step-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px;
            border-left: 4px solid var(--accent-cyan);
            transition: var(--transition-smooth);
        }

        .step-item:hover {
            border-left-color: var(--accent-lime);
            box-shadow: var(--shadow-glow);
        }

        .step-num {
            background: var(--accent-cyan);
            color: #0B1A30;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .step-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-primary);
        }

        .step-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 24px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .faq-question {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-primary);
            background: transparent;
            width: 100%;
            text-align: left;
        }

        .faq-question i {
            transition: transform 0.3s;
            color: var(--accent-cyan);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 22px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--accent-lime);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #0F0C20, #1A2F4A);
            padding: 50px 20px;
            text-align: center;
            border-top: 2px solid var(--accent-cyan);
            border-bottom: 2px solid var(--accent-cyan);
        }

        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-section p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .btn-cta-large {
            background: var(--accent-lime);
            color: #0B1A30;
            padding: 14px 40px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: var(--shadow-glow-lime);
            display: inline-block;
        }

        .btn-cta-large:hover {
            background: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
            transform: scale(1.03);
        }

        /* Footer */
        .main-footer {
            background: #0A0E1A;
            padding: 40px 20px 20px;
            border-top: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .footer-cols {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 30px;
            margin-bottom: 24px;
        }

        .footer-cols h5 {
            color: var(--accent-cyan);
            font-weight: 700;
            margin-bottom: 8px;
            font-size: 1rem;
        }

        .footer-cols a {
            color: var(--text-secondary);
            display: inline-block;
            margin-bottom: 4px;
        }

        .footer-cols a:hover {
            color: var(--accent-lime);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 999;
            width: 52px;
            height: 52px;
            background: rgba(11, 26, 48, 0.8);
            backdrop-filter: blur(8px);
            border-radius: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1.5px solid var(--accent-cyan);
            box-shadow: var(--shadow-glow);
            transition: var(--transition-smooth);
            animation: pulse-glow 2s infinite;
            color: var(--accent-cyan);
            font-size: 1.4rem;
        }

        .fab-support:hover {
            background: var(--accent-cyan);
            color: #0B1A30;
            transform: scale(1.1);
            box-shadow: 0 0 22px rgba(0,240,255,0.8);
        }

        @keyframes pulse-glow {
            0%, 100% { box-shadow: 0 0 10px rgba(0,240,255,0.5); }
            50% { box-shadow: 0 0 20px rgba(0,240,255,0.9); }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .error-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #FF4500;
            --primary-dark: #E03D00;
            --secondary: #FF0000;
            --bg-dark: #0B0B0B;
            --bg-card: #161616;
            --bg-section: #1A1A1A;
            --text-main: #FFFFFF;
            --text-warm: #CCCCCC;
            --text-muted: #999999;
            --border-color: #333333;
            --accent-glow: rgba(255, 69, 0, 0.6);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --shadow-card: 0 6px 18px rgba(0,0,0,0.6);
            --transition: all 0.25s ease;
        }

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

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

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

        /* Navigation */
        .main-header {
            background: #0A0A0A;
            border-bottom: 1px solid #2A2A2A;
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: 0 2px 8px rgba(0,0,0,0.8);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo-text {
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: -0.5px;
            white-space: nowrap;
        }
        .logo-text:hover {
            color: #FF6B3D;
        }
        .nav-links {
            list-style: none;
            display: flex;
            gap: 8px;
            margin: 0;
        }
        .nav-links a {
            color: var(--text-warm);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 14px;
            border-radius: 20px;
            transition: var(--transition);
        }
        .nav-links a:hover, .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 0 12px var(--accent-glow);
        }
        .auth-btns {
            display: flex;
            gap: 10px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--text-warm);
            color: var(--text-warm);
            padding: 8px 18px;
            border-radius: 20px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-signup {
            background: var(--primary);
            border: 1px solid var(--primary);
            color: #fff;
            padding: 8px 18px;
            border-radius: 20px;
            font-weight: 600;
            cursor: pointer;
            box-shadow: 0 0 8px var(--accent-glow);
            transition: var(--transition);
        }
        .btn-login:hover { background: #2A2A2A; color: #fff; }
        .btn-signup:hover { background: var(--primary-dark); box-shadow: 0 0 18px var(--primary); }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
        }

        /* Hero */
        .hero {
            background: linear-gradient(135deg, #0D0D0D 0%, #1F0A00 100%);
            padding: 50px 0 60px;
            border-bottom: 1px solid #2A1100;
            position: relative;
            overflow: hidden;
        }
        .hero .container {
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .hero-text {
            flex: 1;
        }
        .hero-text h1 {
            font-size: 2.6rem;
            font-weight: 900;
            color: #FFF;
            margin-bottom: 16px;
            line-height: 1.25;
        }
        .highlight {
            color: var(--primary);
        }
        .hero-text p {
            font-size: 1.15rem;
            color: var(--text-warm);
            margin-bottom: 24px;
            max-width: 550px;
        }
        .hero-visual {
            flex: 1;
            text-align: right;
        }
        .hero-visual img {
            max-height: 280px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid #3A3A3A;
        }
        .cta-btn {
            background: var(--primary);
            color: #fff;
            padding: 14px 30px;
            border: none;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            box-shadow: 0 0 18px var(--accent-glow);
            transition: var(--transition);
            display: inline-block;
            text-decoration: none;
        }
        .cta-btn:hover {
            background: #FF551A;
            box-shadow: 0 0 28px var(--primary);
            transform: translateY(-2px);
        }

        /* Sections */
        section {
            padding: 55px 0;
        }
        .section-dark {
            background: var(--bg-section);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: #FFF;
        }
        .section-sub {
            color: var(--text-muted);
            margin-bottom: 35px;
            font-size: 1.05rem;
        }

        /* Grid & Cards */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid #2F2F2F;
            border-radius: var(--radius-md);
            padding: 28px 22px;
            transition: var(--transition);
            position: relative;
        }
        .feature-card:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 22px rgba(255,69,0,0.25);
            transform: translateY(-4px);
        }
        .icon-orange {
            color: var(--primary);
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--text-warm);
        }

        .list-steps {
            list-style: none;
            padding: 0;
        }
        .list-steps li {
            background: var(--bg-card);
            border-left: 4px solid var(--primary);
            margin-bottom: 18px;
            padding: 18px 22px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: var(--transition);
        }
        .list-steps li:hover {
            background: #1F1F1F;
            border-left-color: #FF6B3D;
        }
        .step-num {
            background: var(--primary);
            color: #fff;
            font-weight: 900;
            font-size: 1.2rem;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            flex-shrink: 0;
        }
        .step-content h4 {
            font-weight: 700;
            margin-bottom: 6px;
            color: #FFF;
        }
        .step-content p {
            color: var(--text-warm);
            margin: 0;
            font-size: 0.95rem;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid #2A2A2A;
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            padding: 20px 22px;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
        }
        .faq-question {
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            color: var(--text-warm);
            margin-top: 10px;
            display: none;
            font-size: 0.95rem;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        .cta-section {
            background: linear-gradient(135deg, #1A0500, #0D0D0D);
            text-align: center;
            padding: 60px 20px;
            border-radius: var(--radius-lg);
            margin: 40px 0;
            border: 1px solid #3A1800;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .main-footer {
            background: #0A0A0A;
            border-top: 1px solid #2A2A2A;
            padding: 45px 0 25px;
            color: var(--text-warm);
        }
        .footer-cols {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-cols h5 {
            color: #FFF;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .footer-cols a {
            color: var(--text-muted);
            text-decoration: none;
            display: block;
            margin-bottom: 6px;
        }
        .footer-cols a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid #1F1F1F;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 90px;
            z-index: 50;
            background: rgba(0,0,0,0.8);
            backdrop-filter: blur(8px);
            border: 2px solid var(--primary);
            color: #fff;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 0 18px var(--accent-glow);
            cursor: pointer;
            transition: var(--transition);
        }
        .fab-left:hover {
            background: var(--primary);
            box-shadow: 0 0 28px var(--primary);
            transform: scale(1.08);
        }

        @media (max-width: 1024px) {
            .hero .container {
                flex-direction: column;
                text-align: center;
            }
            .hero-visual {
                text-align: center;
            }
            .hero-text p {
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .nav-links, .auth-btns {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-links.mobile-open {
                display: flex;
                flex-direction: column;
                background: #0A0A0A;
                position: absolute;
                top: 60px;
                left: 0;
                width: 100%;
                padding: 16px;
                border-bottom: 1px solid #2A2A2A;
                gap: 4px;
            }
            .auth-btns.mobile-open {
                display: flex;
                justify-content: center;
                padding-bottom: 10px;
            }
            section {
                padding: 40px 0;
            }
        }