/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #0F1525;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-hover: #3D7FFF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8899B4;
            --border-glow: rgba(0, 240, 255, 0.18);
            --border-strong: rgba(0, 240, 255, 0.4);
            --shadow-glow: 0 4px 24px rgba(0, 82, 255, 0.25);
            --shadow-cyan: 0 4px 20px rgba(0, 240, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.75rem;
            --spacing-lg: 3rem;
            --spacing-xl: 4.5rem;
            --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            color: inherit;
        }

        input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            color: var(--text-primary);
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.45);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1.5rem;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
            font-weight: 800;
            font-size: 1.05rem;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }

        .logo-link:hover {
            color: var(--accent-cyan);
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.15;
        }

        .logo-text small {
            font-size: 0.6rem;
            font-weight: 500;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-cyan);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            flex: 1;
            justify-content: center;
        }

        .main-nav a {
            position: relative;
            padding: 0.5rem 0.9rem;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
        }

        .main-nav a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 0.5rem 1.1rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: 6px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: all var(--transition-fast);
            background: transparent;
        }

        .btn-login:hover {
            color: var(--text-primary);
            border-color: rgba(255, 255, 255, 0.35);
            background: rgba(255, 255, 255, 0.05);
        }

        .btn-signup {
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            border-radius: 6px;
            background: linear-gradient(135deg, var(--accent-blue), #0080E0);
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.35);
            transition: all var(--transition-fast);
            border: none;
        }

        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(0, 82, 255, 0.5);
            transform: translateY(-1px);
            background: linear-gradient(135deg, #0052FF, #00B4FF);
        }

        .btn-signup:active {
            transform: translateY(1px);
            box-shadow: 0 2px 10px rgba(0, 82, 255, 0.3);
        }

        .mobile-menu-btn {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all var(--transition-fast);
        }

        .mobile-menu-btn:hover {
            color: var(--accent-cyan);
            border-color: var(--border-strong);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 0.5rem 1rem 1rem;
            background: rgba(8, 9, 15, 0.98);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
        }

        .mobile-menu a {
            padding: 0.7rem 0.5rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: color var(--transition-fast);
        }

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

        .mobile-menu a.active {
            color: var(--accent-cyan);
        }

        @media (max-width: 920px) {
            .main-nav {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .mobile-menu.show {
                display: flex;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 8.5rem 0 4.5rem;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8,9,15,0.4) 0%, rgba(8,9,15,0.82) 60%, rgba(8,9,15,0.95) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 5;
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 3rem;
            align-items: center;
        }

        @media (max-width: 860px) {
            .hero-content {
                grid-template-columns: 1fr;
                gap: 2.5rem;
            }
        }

        .hero-left {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 1.5rem;
        }

        .hero-cover-card {
            position: relative;
            width: 100%;
            max-width: 380px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 2px solid var(--border-glow);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.55), 0 0 32px rgba(0, 240, 255, 0.12);
            background: var(--bg-card);
            transition: all var(--transition-base);
        }

        .hero-cover-card:hover {
            border-color: var(--border-strong);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.65), 0 0 42px rgba(0, 240, 255, 0.22);
        }

        .hero-cover-card img {
            width: 100%;
            aspect-ratio: 3/4;
            object-fit: cover;
        }

        .hero-cover-badge {
            position: absolute;
            top: 14px;
            right: 14px;
            padding: 0.3rem 0.9rem;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 20px;
            box-shadow: 0 2px 12px rgba(0, 240, 255, 0.4);
        }

        .hero-cover-info {
            padding: 1.2rem 1.4rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.8rem;
        }

        .hero-cover-info span {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .hero-cover-info strong {
            font-size: 0.9rem;
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .hero-right {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.35rem 1rem;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: 20px;
            width: fit-content;
        }

        .hero-eyebrow i {
            font-size: 0.7rem;
            color: var(--accent-cyan);
        }

        .hero-title {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 850;
            line-height: 1.18;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin: 0;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), #4DC8FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.05rem;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 560px;
        }

        .hero-toc {
            background: rgba(13, 17, 30, 0.7);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.4rem 1.6rem;
            backdrop-filter: blur(8px);
        }

        .hero-toc h3 {
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 0.7rem;
        }

        .hero-toc ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }

        .hero-toc ul li {
            font-size: 0.88rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.25rem 0;
        }

        .hero-toc ul li i {
            color: var(--accent-cyan);
            font-size: 0.7rem;
            width: 16px;
            text-align: center;
        }

        .hero-form {
            display: flex;
            gap: 0.7rem;
            flex-wrap: wrap;
            align-items: center;
        }

        .hero-form input {
            flex: 1;
            min-width: 200px;
            padding: 0.85rem 1.2rem;
            font-size: 0.92rem;
            background: rgba(13, 17, 30, 0.8);
            border: 1px solid var(--border-glow);
            border-radius: 8px;
            color: var(--text-primary);
            transition: all var(--transition-fast);
        }

        .hero-form input::placeholder {
            color: var(--text-muted);
        }

        .hero-form input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.12);
            outline: none;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.7rem;
            align-items: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 1.8rem;
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), #0080E0);
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.4);
            transition: all var(--transition-fast);
            border: none;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 82, 255, 0.55);
            background: linear-gradient(135deg, #0052FF, #00A6FF);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 1.5rem;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: transparent;
            border: 1px solid var(--border-strong);
            border-radius: 8px;
            transition: all var(--transition-fast);
        }

        .btn-secondary:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
        }

        .hero-stats {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
            padding-top: 0.5rem;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 0.15rem;
        }

        .hero-stat strong {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--accent-cyan);
        }

        .hero-stat span {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* ===== Section Base ===== */
        .section {
            padding: 3.5rem 0 2.5rem;
        }

        .section-head {
            margin-bottom: 2rem;
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.07em;
            text-transform: uppercase;
            color: var(--accent-cyan);
        }

        .section-label::before {
            content: '';
            display: inline-block;
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .section-title {
            font-size: clamp(1.4rem, 3vw, 1.9rem);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 680px;
        }

        /* ===== KPI / Selling Dashboard ===== */
        .kpi-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
            gap: 1rem;
            align-items: stretch;
        }

        @media (max-width: 860px) {
            .kpi-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .kpi-grid {
                grid-template-columns: 1fr;
            }
        }

        .kpi-intro {
            padding: 1.6rem 1.8rem;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 0.6rem;
        }

        .kpi-intro h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .kpi-intro p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .kpi-item {
            padding: 1.6rem 1.2rem;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            display: flex;
            flex-direction: column;
            gap: 0.3rem;
            transition: all var(--transition-base);
        }

        .kpi-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-cyan);
        }

        .kpi-item strong {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
        }

        .kpi-item span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ===== Three Pillars ===== */
        .three-col-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.4rem;
        }

        @media (max-width: 860px) {
            .three-col-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 560px) {
            .three-col-grid {
                grid-template-columns: 1fr;
            }
        }

        .pillar-card {
            padding: 2rem 1.6rem;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .pillar-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .pillar-card:hover::before {
            opacity: 1;
        }

        .pillar-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }

        .pillar-icon {
            width: 46px;
            height: 46px;
            border-radius: 10px;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.15));
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent-cyan);
        }

        .pillar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .pillar-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== News / CMS List ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 1.6fr 1fr;
            gap: 2rem;
            align-items: start;
        }

        @media (max-width: 860px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .news-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.1rem 1.2rem;
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .news-item:hover {
            border-color: var(--border-strong);
            background: rgba(13, 17, 30, 0.9);
        }

        .news-item-left {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex: 1;
            min-width: 0;
        }

        .news-item-meta {
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--accent-cyan);
            flex-shrink: 0;
            min-width: 48px;
        }

        .news-item-title {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-primary);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .news-item:hover .news-item-title {
            color: var(--accent-cyan);
        }

        .news-item-summary {
            font-size: 0.78rem;
            color: var(--text-muted);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 260px;
        }

        .news-arrow {
            color: var(--text-muted);
            font-size: 0.8rem;
            flex-shrink: 0;
        }

        .news-empty {
            padding: 2rem;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.9rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed rgba(255, 255, 255, 0.1);
        }

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

        .news-sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .news-sidebar-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-cyan);
        }

        .news-sidebar-card img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
        }

        .news-sidebar-body {
            padding: 1rem 1.2rem;
            display: flex;
            flex-direction: column;
            gap: 0.3rem;
        }

        .news-sidebar-body h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .news-sidebar-body p {
            font-size: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .news-sidebar-body .tag {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.04em;
        }

        /* ===== Platform Guarantee ===== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.2rem;
        }

        @media (max-width: 820px) {
            .guarantee-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
        }

        .guarantee-badge {
            display: flex;
            align-items: flex-start;
            gap: 0.9rem;
            padding: 1.4rem 1.3rem;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
        }

        .guarantee-badge:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-cyan);
        }

        .guarantee-badge i {
            font-size: 1.3rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
            width: 28px;
            text-align: center;
        }

        .guarantee-badge h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.3rem;
        }

        .guarantee-badge p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        /* ===== Milestone / Steps ===== */
        .milestone-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            position: relative;
        }

        @media (max-width: 820px) {
            .milestone-row {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
        }

        .milestone-item {
            position: relative;
            padding: 1.8rem 1.5rem;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
        }

        .milestone-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        .milestone-number {
            font-size: 2.4rem;
            font-weight: 850;
            color: rgba(0, 240, 255, 0.2);
            line-height: 1;
            margin-bottom: 0.7rem;
        }

        .milestone-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }

        .milestone-item p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Collection Directory ===== */
        .collection-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.4rem;
        }

        @media (max-width: 860px) {
            .collection-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 560px) {
            .collection-grid {
                grid-template-columns: 1fr;
            }
        }

        .collection-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-glow);
            background: var(--bg-card);
            transition: all var(--transition-base);
        }

        .collection-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-cyan);
            transform: translateY(-3px);
        }

        .collection-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }

        .collection-body {
            padding: 1.2rem 1.3rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .collection-body h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .collection-body p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        .collection-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .collection-meta strong {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
            max-width: 800px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--border-glow);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.1rem 1.3rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-question i {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

        .faq-question.open i {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 1.3rem;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .faq-answer.open {
            max-height: 300px;
            padding: 0 1.3rem 1.2rem;
        }

        /* ===== Bottom Fixed CTA ===== */
        .bottom-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 80;
            background: rgba(8, 9, 15, 0.94);
            backdrop-filter: blur(12px);
            border-top: 1px solid var(--border-glow);
            padding: 0.7rem 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            transform: translateY(100%);
            transition: transform var(--transition-base);
        }

        .bottom-cta-bar.visible {
            transform: translateY(0);
        }

        .bottom-cta-bar p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== FAB ===== */
        .fab-container {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 90;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.5rem;
        }

        .fab-btn {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(10px);
            border: 2px solid var(--border-strong);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            transition: all var(--transition-fast);
            opacity: 0.65;
            animation: fab-breath 3s ease-in-out infinite;
        }

        .fab-btn:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.6);
        }

        .fab-btn:active {
            transform: scale(0.94);
        }

        .fab-notification {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            background: #FF3B30;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: fab-blink 1.5s ease-in-out infinite;
        }

        @keyframes fab-breath {
            0%, 100% { box-shadow: 0 0 15px rgba(0, 240, 255, 0.35); }
            50% { box-shadow: 0 0 25px rgba(0, 240, 255, 0.55); }
        }

        @keyframes fab-blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* ===== Footer ===== */
        .site-footer {
            padding: 2.5rem 0 1.5rem;
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            margin-bottom: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        @media (max-width: 820px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 800;
            font-size: 1.05rem;
            color: var(--text-primary);
        }

        .footer-logo .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 0.9rem;
            border-radius: 8px;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: var(--text-secondary);
            margin-bottom: 0.8rem;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.45rem;
        }

        .footer-col ul a {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            padding-top: 1.2rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 0.8rem;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* ===== Responsive Adjustments ===== */
        @media (max-width: 1024px) {
            .hero-section {
                padding-top: 7.5rem;
                min-height: auto;
            }
            .section {
                padding: 3rem 0 2rem;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 58px;
            }
            .logo-text small {
                display: none;
            }
            .hero-title {
                font-size: 1.75rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .hero-cover-card {
                max-width: 280px;
            }
            .three-col-grid {
                grid-template-columns: 1fr;
            }
            .kpi-grid {
                grid-template-columns: 1fr 1fr;
            }
            .kpi-intro {
                grid-column: span 2;
            }
            @media (max-width: 400px) {
                .kpi-grid {
                    grid-template-columns: 1fr;
                }
                .kpi-intro {
                    grid-column: span 1;
                }
            }
            .news-item-title,
            .news-item-summary {
                white-space: normal;
                max-width: none;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .news-item-left {
                flex-wrap: wrap;
            }
            .news-arrow {
                display: none;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .milestone-row {
                grid-template-columns: 1fr;
            }
            .collection-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-form {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-form input {
                min-width: auto;
            }
            .bottom-cta-bar {
                padding: 0.55rem 0.8rem;
                flex-wrap: wrap;
            }
            .bottom-cta-bar p {
                font-size: 0.75rem;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #0F1525;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-hover: #3D7FFF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8899B4;
            --border-glow: rgba(0, 240, 255, 0.18);
            --border-strong: rgba(0, 240, 255, 0.4);
            --shadow-glow: 0 4px 24px rgba(0, 82, 255, 0.25);
            --shadow-cyan: 0 4px 20px rgba(0, 240, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.75rem;
            --spacing-lg: 3rem;
            --spacing-xl: 4.5rem;
            --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            color: inherit;
        }
        input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            color: var(--text-primary);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.45);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1.5rem;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
            font-weight: 800;
            font-size: 1.05rem;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }
        .logo-link:hover {
            color: var(--accent-cyan);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
            flex-shrink: 0;
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.15;
        }
        .logo-text small {
            font-size: 0.6rem;
            font-weight: 500;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-cyan);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            flex: 1;
            justify-content: center;
        }
        .main-nav a {
            position: relative;
            padding: 0.5rem 0.9rem;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .main-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
        }
        .main-nav a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }
        .btn-login {
            padding: 0.5rem 1.1rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .btn-login:hover {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }
        .btn-signup {
            padding: 0.5rem 1.25rem;
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 6px;
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.35);
            transition: box-shadow var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
        }
        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.45);
            transform: translateY(-1px);
        }
        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text-secondary);
            border: 1px solid var(--border-glow);
            background: rgba(15, 21, 37, 0.6);
            transition: color var(--transition-fast), border-color var(--transition-fast);
        }
        .mobile-menu-toggle:hover {
            color: var(--accent-cyan);
            border-color: var(--accent-cyan);
        }
        @media (max-width: 860px) {
            .main-nav {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                flex-direction: column;
                align-items: stretch;
                padding: 1rem;
                gap: 0.25rem;
                border-bottom: 1px solid var(--border-glow);
                display: none;
                z-index: 99;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.75rem 1rem;
                font-size: 1rem;
                border-radius: 8px;
            }
            .main-nav a.active::after {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .header-actions {
                margin-left: auto;
            }
        }
        @media (max-width: 520px) {
            .btn-login {
                padding: 0.4rem 0.7rem;
                font-size: 0.75rem;
            }
            .btn-signup {
                padding: 0.4rem 0.85rem;
                font-size: 0.75rem;
            }
            .header-inner {
                gap: 0.75rem;
            }
            .logo-link {
                font-size: 0.9rem;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 0.95rem;
            }
        }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding-top: 68px;
            min-height: 340px;
            display: flex;
            align-items: flex-end;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            isolation: isolate;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8,9,15,0.55) 0%, rgba(8,9,15,0.75) 60%, var(--bg-primary) 100%);
            z-index: -1;
        }
        .article-banner-content {
            width: 100%;
            padding-bottom: 1.75rem;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--accent-cyan);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb i {
            font-size: 0.55rem;
            opacity: 0.7;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            flex-wrap: wrap;
            margin-top: 0.75rem;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .article-meta i {
            color: var(--accent-cyan);
            font-size: 0.75rem;
        }
        .article-category-badge {
            display: inline-block;
            padding: 0.25rem 0.85rem;
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: 20px;
            margin-bottom: 0.75rem;
        }
        .article-banner h1 {
            font-size: clamp(1.5rem, 3.5vw, 2.5rem);
            line-height: 1.3;
            font-weight: 800;
            letter-spacing: -0.01em;
            max-width: 850px;
        }

        /* ===== Article Body ===== */
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 300px;
            gap: 2.5rem;
            padding: 2.5rem 0 3rem;
            align-items: start;
        }
        .article-main {
            min-width: 0;
        }
        .article-content {
            color: var(--text-secondary);
            font-size: 1.02rem;
            line-height: 1.75;
        }
        .article-content p {
            margin-bottom: 1.25rem;
        }
        .article-content h2 {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--text-primary);
            margin: 2rem 0 1rem;
            letter-spacing: -0.01em;
        }
        .article-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin: 1.5rem 0 0.75rem;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.25rem;
            padding-left: 1.25rem;
        }
        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.5rem;
            position: relative;
        }
        .article-content ul li::marker {
            color: var(--accent-cyan);
        }
        .article-content ol li::marker {
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .article-content blockquote {
            border-left: 3px solid var(--accent-cyan);
            padding: 1rem 1.25rem;
            margin: 1.75rem 0;
            font-size: 1.05rem;
            font-style: italic;
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }
        .pull-quote {
            border-left: 3px solid var(--accent-cyan);
            padding: 1.5rem 1.75rem;
            margin: 2.5rem 0;
            font-size: 1.25rem;
            line-height: 1.7;
            font-weight: 600;
            color: #fff;
            background: rgba(0, 82, 255, 0.06);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            position: relative;
        }
        .pull-quote::before {
            content: '\201C';
            font-size: 3rem;
            color: var(--accent-cyan);
            position: absolute;
            left: 0.6rem;
            top: -0.4rem;
            opacity: 0.35;
            font-family: Georgia, serif;
            line-height: 1;
        }
        .pull-quote i {
            color: var(--accent-cyan);
            font-size: 0.85rem;
            display: block;
            margin-top: 0.5rem;
            font-style: normal;
            font-weight: 500;
        }

        /* ===== Article Sidebar ===== */
        .article-sidebar {
            position: sticky;
            top: 88px;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.25rem;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }
        .sidebar-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-cyan);
        }
        .sidebar-card h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar-card h4 i {
            color: var(--accent-cyan);
            font-size: 0.8rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card ul li {
            margin-bottom: 0.5rem;
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
        }
        .sidebar-card ul li i {
            color: var(--accent-cyan);
            font-size: 0.7rem;
            margin-top: 0.35rem;
        }
        .sidebar-card a {
            color: var(--text-secondary);
            font-size: 0.82rem;
            transition: color var(--transition-fast);
        }
        .sidebar-card a:hover {
            color: var(--accent-cyan);
        }

        /* ===== Check Steps Section ===== */
        .check-section {
            padding: 3rem 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-glow);
            border-bottom: 1px solid var(--border-glow);
        }
        .check-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1.25rem;
            margin-top: 1.75rem;
        }
        .check-step {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
        }
        .check-step:hover {
            transform: translateY(-3px);
            border-color: var(--border-strong);
            box-shadow: var(--shadow-glow);
        }
        .check-step .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            font-weight: 800;
            font-size: 0.9rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            margin-bottom: 0.75rem;
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.3);
        }
        .check-step h3 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.4rem;
        }
        .check-step p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* ===== Tools Grid ===== */
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.25rem;
            margin-top: 1.75rem;
        }
        .tool-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
        }
        .tool-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-strong);
            box-shadow: var(--shadow-glow);
        }
        .tool-card img {
            width: 100%;
            height: 170px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-glow);
        }
        .tool-card-body {
            padding: 1.25rem;
        }
        .tool-card-body h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        .tool-card-body p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 3rem 0;
        }
        .faq-list {
            margin-top: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-strong);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1rem 1.25rem;
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            text-align: left;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-base);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 1.25rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.25rem 1.25rem;
        }
        .faq-answer p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 3.5rem 0;
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            border-top: 1px solid var(--border-glow);
        }
        .cta-card {
            background: var(--bg-card);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-lg);
            padding: 2rem 2.25rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            flex-wrap: wrap;
            box-shadow: var(--shadow-glow);
        }
        .cta-card h2 {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        .cta-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0;
            max-width: 520px;
        }
        .cta-buttons {
            display: flex;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .btn-primary {
            padding: 0.7rem 1.5rem;
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 8px;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
            transition: box-shadow var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
        }
        .btn-primary:hover {
            box-shadow: 0 8px 30px rgba(0, 240, 255, 0.45);
            transform: translateY(-2px);
        }
        .btn-outline {
            padding: 0.7rem 1.5rem;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-secondary);
            border: 1px solid var(--border-glow);
            border-radius: 8px;
            transition: border-color var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }
        .btn-outline:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-glow);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 800;
            font-size: 1.05rem;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }
        .footer-brand .footer-logo .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 0.9rem;
            border-radius: 8px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 400px;
            margin: 0;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul li a {
            font-size: 0.82rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
            padding-top: 1.25rem;
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.75rem;
            }
            .article-layout {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .article-sidebar {
                position: static;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.25rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-card {
                padding: 1.5rem;
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-buttons {
                width: 100%;
                flex-direction: column;
            }
            .btn-primary, .btn-outline {
                text-align: center;
            }
            .article-banner {
                min-height: 260px;
            }
            .pull-quote {
                font-size: 1.05rem;
                padding: 1.25rem 1.5rem;
            }
        }

        /* ===== FAB ===== */
        .fab-cyber {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.7rem 1.15rem;
            border-radius: 50px;
            background: rgba(8, 9, 15, 0.65);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8,9,15,0.65), rgba(8,9,15,0.65)), linear-gradient(135deg, #0052FF, #00F0FF);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
            transition: transform var(--transition-base), box-shadow var(--transition-base), opacity var(--transition-fast);
            opacity: 0.6;
            min-width: 48px;
            min-height: 48px;
            justify-content: center;
            cursor: pointer;
        }
        .fab-cyber:hover {
            opacity: 1;
            transform: scale(1.08);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
        }
        .fab-cyber:active {
            transform: scale(0.95);
            box-shadow: 0 0 40px rgba(255, 0, 255, 0.5);
        }
        .fab-cyber .fab-icon {
            font-size: 1.15rem;
            color: var(--accent-cyan);
            animation: fabPulse 2.5s ease-in-out infinite;
        }
        .fab-cyber .fab-label {
            font-size: 0.75rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .fab-cyber .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #FF007F;
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.7);
            animation: fabBlink 1.8s ease-in-out infinite;
        }
        @keyframes fabPulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.55; }
        }
        @keyframes fabBlink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* ===== Not Found State ===== */
        .not-found-state {
            text-align: left;
            padding: 3rem 0;
        }
        .not-found-state h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }
        .not-found-state p {
            color: var(--text-muted);
            font-size: 1rem;
            margin-bottom: 1.5rem;
        }
        .not-found-state a {
            display: inline-block;
            padding: 0.7rem 1.5rem;
            font-weight: 700;
            font-size: 0.9rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 8px;
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.3);
            transition: box-shadow var(--transition-fast), transform var(--transition-fast);
        }
        .not-found-state a:hover {
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
        }

/* roulang page: category1 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #0F1525;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-hover: #3D7FFF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8899B4;
            --border-glow: rgba(0, 240, 255, 0.18);
            --border-strong: rgba(0, 240, 255, 0.4);
            --shadow-glow: 0 4px 24px rgba(0, 82, 255, 0.25);
            --shadow-cyan: 0 4px 20px rgba(0, 240, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.75rem;
            --spacing-lg: 3rem;
            --spacing-xl: 4.5rem;
            --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-bottom: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            color: inherit;
        }
        input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            color: var(--text-primary);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
        }
        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.45);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1.5rem;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
            font-weight: 800;
            font-size: 1.05rem;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }
        .logo-link:hover {
            color: var(--accent-cyan);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.15;
        }
        .logo-text small {
            font-size: 0.6rem;
            font-weight: 500;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-cyan);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            flex: 1;
            justify-content: center;
        }
        .main-nav a {
            position: relative;
            padding: 0.5rem 0.9rem;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .main-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
        }
        .main-nav a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }
        .btn-login {
            padding: 0.5rem 1.1rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: 6px;
            border: 1px solid transparent;
            transition: all var(--transition-fast);
        }
        .btn-login:hover {
            color: var(--accent-cyan);
            border-color: rgba(0, 240, 255, 0.3);
        }
        .btn-signup {
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            border-radius: 6px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
        }
        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 20px rgba(0, 240, 255, 0.4);
        }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            border: 1px solid rgba(0, 240, 255, 0.25);
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.05);
            flex-shrink: 0;
        }
        @media (max-width: 900px) {
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                align-items: stretch;
                padding: 1rem;
                gap: 0.5rem;
                border-bottom: 1px solid rgba(0, 240, 255, 0.15);
                transform: translateY(-110%);
                transition: transform var(--transition-base);
                z-index: 99;
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .main-nav a {
                padding: 0.9rem 1rem;
                font-size: 1rem;
                border-radius: 8px;
            }
            .main-nav a.active::after {
                display: none;
            }
            .header-actions {
                margin-left: auto;
            }
        }
        @media (max-width: 520px) {
            .btn-login {
                padding: 0.4rem 0.8rem;
                font-size: 0.78rem;
            }
            .btn-signup {
                padding: 0.4rem 0.9rem;
                font-size: 0.78rem;
            }
        }
        /* ===== Hero ===== */
        .hero-section {
            padding-top: 120px;
            padding-bottom: var(--spacing-lg);
            background: radial-gradient(circle at 20% 20%, rgba(0, 82, 255, 0.15), transparent 40%),
                        radial-gradient(circle at 80% 80%, rgba(0, 240, 255, 0.08), transparent 45%);
            position: relative;
            overflow: hidden;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 3rem;
            align-items: center;
        }
        .hero-content {
            text-align: left;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 0.9rem;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: 1.2rem;
        }
        .hero-badge i {
            font-size: 0.85rem;
        }
        .hero-content h1 {
            font-size: 2.6rem;
            line-height: 1.25;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 1.2rem;
            color: var(--text-primary);
        }
        .hero-content h1 span {
            color: var(--accent-cyan);
        }
        .hero-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 1.8rem;
            max-width: 540px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin-bottom: 1.5rem;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.9rem 1.8rem;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 30px rgba(0, 240, 255, 0.45);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.9rem 1.8rem;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }
        .btn-secondary:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--border-strong);
            color: var(--text-primary);
        }
        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .hero-trust span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
        }
        .hero-visual .video-frame {
            position: relative;
            width: 100%;
            max-width: 380px;
            aspect-ratio: 9/16;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.3);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 240, 255, 0.15);
            background: var(--bg-card);
        }
        .video-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .video-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 1.5rem 1rem;
            background: linear-gradient(to top, rgba(8,9,15,0.9), transparent);
        }
        .overlay-tag {
            display: inline-block;
            background: rgba(0, 240, 255, 0.2);
            color: var(--accent-cyan);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.7rem;
            border-radius: 999px;
            margin-bottom: 0.5rem;
        }
        .overlay-text {
            font-weight: 700;
            font-size: 1rem;
        }
        .floating-badge {
            position: absolute;
            top: 20px;
            right: -20px;
            background: rgba(8, 9, 15, 0.85);
            border: 1px solid rgba(0, 240, 255, 0.35);
            border-radius: 12px;
            padding: 0.7rem 1rem;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-primary);
            box-shadow: 0 8px 20px rgba(0,0,0,0.4);
            backdrop-filter: blur(8px);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .floating-badge i {
            color: var(--accent-cyan);
        }
        @media (max-width: 900px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 2.5rem;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-visual .video-frame {
                max-width: 300px;
            }
        }
        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.7rem;
            }
            .hero-sub {
                font-size: 0.95rem;
            }
            .btn-primary, .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .floating-badge {
                right: 0;
            }
        }
        /* ===== Sections General ===== */
        .section {
            padding: var(--spacing-lg) 0;
        }
        .section-head {
            text-align: left;
            margin-bottom: 2rem;
        }
        .section-head h2 {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 0.5rem;
        }
        .section-head p {
            color: var(--text-secondary);
            max-width: 650px;
        }
        .section-divider {
            height: 1px;
            background: linear-gradient(to right, rgba(0, 240, 255, 0.3), transparent);
            margin-bottom: 2rem;
        }
        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: border-color var(--transition-fast), transform var(--transition-fast);
        }
        .stat-card:hover {
            border-color: var(--border-strong);
            transform: translateY(-3px);
        }
        .stat-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }
        .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.3rem;
        }
        @media (max-width: 700px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ===== Benefits / Checklist ===== */
        .benefits-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .benefits-text h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .benefits-text p {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
        }
        .benefit-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .benefit-list li {
            display: flex;
            gap: 0.8rem;
            align-items: flex-start;
            padding: 0.7rem 0;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        .benefit-list li:last-child {
            border-bottom: none;
        }
        .benefit-list i {
            color: var(--accent-cyan);
            margin-top: 0.3rem;
            flex-shrink: 0;
        }
        .benefit-list strong {
            color: var(--text-primary);
        }
        .benefits-visual {
            position: relative;
        }
        .benefits-visual img {
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-glow);
            box-shadow: 0 15px 40px rgba(0,0,0,0.4);
        }
        .benefits-visual::after {
            content: '';
            position: absolute;
            inset: 15px;
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            pointer-events: none;
        }
        @media (max-width: 800px) {
            .benefits-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }
        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }
        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.2rem;
            position: relative;
            transition: border-color var(--transition-fast), transform var(--transition-fast);
        }
        .step-item:hover {
            border-color: var(--border-strong);
            transform: translateY(-3px);
        }
        .step-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1;
            margin-bottom: 0.8rem;
            opacity: 0.8;
        }
        .step-item h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        @media (max-width: 900px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ===== Social Proof ===== */
        .proof-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.2rem;
        }
        .proof-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            text-align: left;
        }
        .proof-quote {
            color: var(--text-secondary);
            font-style: italic;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        .proof-author {
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        .proof-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.8rem;
            color: #fff;
        }
        .proof-name {
            font-weight: 600;
            font-size: 0.85rem;
        }
        .proof-role {
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        @media (max-width: 800px) {
            .proof-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            margin-bottom: 0.8rem;
            overflow: hidden;
        }
        .faq-question {
            width: 100%;
            padding: 1rem 1.2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            background: transparent;
        }
        .faq-question i {
            color: var(--accent-cyan);
            transition: transform var(--transition-fast);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
        }
        .faq-answer-inner {
            padding: 0 1.2rem 1.2rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        /* ===== Bottom CTA ===== */
        .bottom-cta-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-glow);
            padding: 2rem 0;
        }
        .bottom-cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .bottom-cta-text h3 {
            font-size: 1.2rem;
            font-weight: 700;
        }
        .bottom-cta-text p {
            color: var(--text-muted);
            margin: 0;
        }
        /* ===== Fixed Bottom Bar ===== */
        .fixed-bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(8, 9, 15, 0.97);
            backdrop-filter: blur(16px);
            border-top: 1px solid rgba(0, 240, 255, 0.25);
            z-index: 90;
            padding: 0.6rem 1rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.8rem;
        }
        .fixed-bottom-bar p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
            font-weight: 500;
        }
        .fixed-bottom-bar .btn-primary {
            padding: 0.6rem 1.2rem;
            font-size: 0.85rem;
            white-space: nowrap;
        }
        @media (max-width: 520px) {
            .fixed-bottom-bar {
                padding: 0.5rem 0.8rem;
            }
            .fixed-bottom-bar p {
                font-size: 0.75rem;
            }
        }
        /* ===== FAB ===== */
        .fab-support {
            position: fixed;
            left: 1rem;
            bottom: 90px;
            z-index: 95;
            width: 52px;
            height: 52px;
            border-radius: 16px;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(8px);
            border: 1.5px solid transparent;
            background-image: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), linear-gradient(135deg, #CCFF00, #00F0FF);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #00F0FF;
            font-size: 1.3rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            animation: fabBreath 2.5s ease-in-out infinite;
        }
        .fab-support:hover {
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.8);
            color: #CCFF00;
        }
        .fab-support .notification-dot {
            position: absolute;
            top: 6px;
            right: 6px;
            width: 10px;
            height: 10px;
            background: #FF007F;
            border-radius: 50%;
            box-shadow: 0 0 8px #FF007F;
            animation: dotBlink 1s infinite;
        }
        @keyframes fabBreath {
            0%, 100% { box-shadow: 0 0 15px rgba(0, 240, 255, 0.5); }
            50% { box-shadow: 0 0 25px rgba(0, 240, 255, 0.9); }
        }
        @keyframes dotBlink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-glow);
            padding: 3rem 0 5rem;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 1rem;
        }
        .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 0.6rem;
        }
        .footer-col a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            gap: 1rem;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        @media (max-width: 800px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }
        @media (max-width: 520px) {
            .site-footer {
                padding-bottom: 6rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #0F1525;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-hover: #3D7FFF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8899B4;
            --border-glow: rgba(0, 240, 255, 0.18);
            --border-strong: rgba(0, 240, 255, 0.4);
            --shadow-glow: 0 4px 24px rgba(0, 82, 255, 0.25);
            --shadow-cyan: 0 4px 20px rgba(0, 240, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.75rem;
            --spacing-lg: 3rem;
            --spacing-xl: 4.5rem;
            --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            color: inherit;
        }
        input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            color: var(--text-primary);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.45);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1.5rem;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
            font-weight: 800;
            font-size: 1.05rem;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }
        .logo-link:hover {
            color: var(--accent-cyan);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.15;
        }
        .logo-text small {
            font-size: 0.6rem;
            font-weight: 500;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-cyan);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            flex: 1;
            justify-content: center;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .main-nav a {
            position: relative;
            padding: 0.5rem 0.9rem;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .main-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
        }
        .main-nav a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 1px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }
        .btn-login {
            padding: 0.5rem 1.1rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: 6px;
            border: 1px solid transparent;
            transition: all var(--transition-fast);
        }
        .btn-login:hover {
            color: var(--accent-cyan);
            border-color: rgba(0, 240, 255, 0.3);
        }
        .btn-signup {
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), #0077ff);
            border-radius: 8px;
            box-shadow: 0 4px 14px rgba(0, 82, 255, 0.35);
            transition: all var(--transition-fast);
        }
        .btn-signup:hover {
            background: linear-gradient(135deg, #0077ff, var(--accent-cyan));
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.35);
        }
        @media (max-width: 780px) {
            .logo-text small {
                display: none;
            }
            .header-actions .btn-login,
            .header-actions .btn-signup {
                padding: 0.45rem 0.75rem;
                font-size: 0.75rem;
            }
        }
        @media (max-width: 540px) {
            .header-inner {
                height: 60px;
                gap: 0.6rem;
            }
            .main-nav {
                justify-content: flex-start;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            padding: 7.5rem 0 4rem;
            background-image: linear-gradient(135deg, rgba(8,9,15,0.95) 0%, rgba(13,17,30,0.85) 100%), url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 70% 20%, rgba(0,240,255,0.12), transparent 40%);
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 3rem;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .countdown-bar {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid var(--border-glow);
            border-radius: 40px;
            padding: 0.4rem 0.9rem;
            font-size: 0.85rem;
            color: var(--accent-cyan);
            margin-bottom: 1.25rem;
        }
        .countdown-timer {
            font-weight: 800;
            letter-spacing: 0.04em;
        }
        .hero-title {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 1.5rem;
        }
        .hero-title span {
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 580px;
            margin-bottom: 2rem;
            line-height: 1.7;
        }
        .hero-cta-wrap {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.9rem 1.8rem;
            font-weight: 800;
            font-size: 0.95rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), #0077ff);
            border-radius: 12px;
            box-shadow: 0 8px 24px rgba(0, 82, 255, 0.4);
            transition: all var(--transition-base);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #0077ff, var(--accent-cyan));
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 240, 255, 0.4);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.9rem 1.8rem;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid var(--border-glow);
            border-radius: 12px;
            transition: all var(--transition-base);
        }
        .btn-secondary:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--border-strong);
            transform: translateY(-2px);
        }
        .hero-product-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            box-shadow: var(--shadow-glow);
        }
        .product-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 1.25rem;
        }
        .product-img img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .product-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            border: 1px solid var(--border-glow);
            padding: 0.25rem 0.7rem;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .product-card-title {
            font-size: 1.25rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
        }
        .product-price {
            font-size: 1.5rem;
            font-weight: 900;
            color: var(--accent-cyan);
            margin-bottom: 0.25rem;
        }
        .product-old-price {
            font-size: 0.9rem;
            color: var(--text-muted);
            text-decoration: line-through;
        }
        .product-features {
            margin: 1rem 0 1.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .product-features li {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 0.4rem;
        }
        .product-features i {
            color: var(--accent-cyan);
            margin-top: 4px;
        }
        @media (max-width: 900px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 2.5rem;
            }
            .hero-product-card {
                max-width: 500px;
                width: 100%;
            }
        }
        @media (max-width: 540px) {
            .hero-section {
                padding: 6rem 0 3rem;
            }
            .hero-cta-wrap {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary,
            .btn-secondary {
                justify-content: center;
            }
        }

        /* ===== Section General ===== */
        .section {
            padding: 4.5rem 0;
        }
        .section-head {
            margin-bottom: 2.5rem;
            max-width: 700px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 800;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 0.5rem;
        }
        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.5rem);
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-top: 0.75rem;
        }

        /* ===== Value Props ===== */
        .value-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            align-items: start;
        }
        .value-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            transition: all var(--transition-base);
        }
        .value-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-cyan);
            transform: translateY(-4px);
        }
        .value-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 240, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }
        .value-card h3 {
            font-size: 1.2rem;
            font-weight: 800;
            margin-bottom: 0.6rem;
        }
        .value-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        @media (max-width: 900px) {
            .value-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 600px) {
            .value-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Scenario Demo ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 3rem;
            align-items: center;
        }
        .scenario-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .scenario-img img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }
        .step-list {
            list-style: none;
            counter-reset: step;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .step-list li {
            counter-increment: step;
            display: flex;
            gap: 1rem;
            align-items: flex-start;
        }
        .step-num {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .step-content h4 {
            font-size: 1.1rem;
            font-weight: 800;
            margin-bottom: 0.3rem;
        }
        .step-content p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        @media (max-width: 900px) {
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .scenario-img img {
                height: 240px;
            }
        }

        /* ===== Social Proof ===== */
        .stats-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-bottom: 3rem;
        }
        .stat-item {
            flex: 1 1 180px;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.25rem;
            text-align: left;
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent-cyan);
            line-height: 1.1;
        }
        .stat-label {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-top: 0.3rem;
        }
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }
        .testimonial-card {
            display: flex;
            gap: 1rem;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.5rem;
        }
        .testimonial-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            overflow: hidden;
            border: 2px solid var(--accent-cyan);
            flex-shrink: 0;
        }
        .testimonial-content p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0.5rem;
        }
        .testimonial-name {
            font-weight: 800;
            font-size: 0.9rem;
        }
        .testimonial-role {
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        @media (max-width: 700px) {
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 850px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-sm);
            margin-bottom: 0.8rem;
            overflow: hidden;
        }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.1rem 1.25rem;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
            transition: background var(--transition-fast);
            text-align: left;
        }
        .faq-question:hover {
            background: rgba(0, 240, 255, 0.04);
        }
        .faq-question i {
            transition: transform var(--transition-fast);
            color: var(--accent-cyan);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
        }
        .faq-answer-inner {
            padding: 0 1.25rem 1.25rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        /* ===== Final CTA ===== */
        .cta-section {
            padding: 4.5rem 0;
            background-image: linear-gradient(135deg, rgba(8,9,15,0.9) 0%, rgba(0,82,255,0.25) 100%), url('/assets/images/backpic/back-3.jpg');
            background-size: cover;
            background-position: center;
            text-align: center;
        }
        .cta-inner {
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 900;
            margin-bottom: 1rem;
        }
        .cta-inner p {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            font-size: 1.05rem;
        }
        .cta-form {
            display: flex;
            gap: 0.8rem;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 1.25rem;
        }
        .cta-input {
            flex: 1;
            min-width: 240px;
            padding: 0.85rem 1rem;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glow);
            border-radius: 8px;
            color: #fff;
            transition: border-color var(--transition-fast);
        }
        .cta-input::placeholder {
            color: var(--text-muted);
        }
        .cta-input:focus {
            outline: none;
            border-color: var(--accent-cyan);
        }
        .cta-note {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== Fixed Bottom Bar ===== */
        .bottom-flash {
            position: fixed;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 90;
            background: rgba(8, 9, 15, 0.96);
            backdrop-filter: blur(12px);
            border-top: 1px solid var(--border-glow);
            padding: 0.75rem 1.5rem;
            display: none;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }
        .bottom-flash.show {
            display: flex;
        }
        .bottom-flash-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .bottom-flash-text strong {
            color: var(--accent-cyan);
        }
        .btn-flash {
            padding: 0.6rem 1.2rem;
            font-weight: 800;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 8px;
        }
        .btn-close-flash {
            color: var(--text-muted);
            font-size: 1rem;
            padding: 0.25rem 0.5rem;
        }
        @media (max-width: 640px) {
            .bottom-flash {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
                padding: 0.75rem 1rem;
            }
        }

        /* ===== FAB ===== */
        .fab-neon {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 80;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.8);
            backdrop-filter: blur(8px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8,9,15,0.8), rgba(8,9,15,0.8)), linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
            transition: all var(--transition-base);
        }
        .fab-neon:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
        }
        .fab-neon .notification-dot {
            position: absolute;
            top: 6px;
            right: 6px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #ff2d55;
            animation: blink 1.2s infinite;
        }
        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.2; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #05070d;
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            padding: 3rem 0 1.5rem;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 1rem;
        }
        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            max-width: 380px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        @media (max-width: 800px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }