/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(22, 28, 45, 0.88);
            --bg-glass: rgba(13, 17, 30, 0.72);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-tertiary: #CCFF00;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #7A8EA8;
            --border-glow: rgba(0, 240, 255, 0.18);
            --border-strong: rgba(0, 240, 255, 0.35);
            --shadow-primary: 0 0 20px rgba(0, 82, 255, 0.35);
            --shadow-cyan: 0 0 16px rgba(0, 240, 255, 0.3);
            --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.55), 0 0 24px rgba(0, 240, 255, 0.12);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --font-primary: 'Inter', 'Segoe UI', 'Arial', sans-serif;
            --font-display: 'Inter', 'Segoe UI', 'Arial', sans-serif;
            --transition-fast: 180ms ease;
            --transition-base: 260ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 420ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-padding: 88px;
            --section-padding-mob: 56px;
            --container-max: 1240px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.62;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 0%, rgba(0, 82, 255, 0.06) 0%, transparent 55%),
                radial-gradient(ellipse at 85% 10%, rgba(0, 240, 255, 0.05) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 82, 255, 0.04) 0%, transparent 45%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
            padding-bottom: 76px;
        }

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

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

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

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-padding) 0;
            position: relative;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-secondary);
            font-weight: 600;
            padding: 6px 14px;
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid rgba(0, 240, 255, 0.22);
            border-radius: 50px;
            margin-bottom: 18px;
            pointer-events: none;
        }

        .section-title {
            font-size: clamp(1.65rem, 3vw, 2.25rem);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin: 0 0 18px 0;
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 1.05rem;
            line-height: 1.65;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 0 38px 0;
        }

        .section-desc.centered {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        /* ===== HEADER NAV ===== */
        .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, 0.1);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            border-bottom-color: rgba(0, 240, 255, 0.2);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            color: var(--text-primary);
        }

        .brand-logo:hover {
            color: var(--text-primary);
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.35), rgba(0, 240, 255, 0.2));
            border: 1.5px solid rgba(0, 240, 255, 0.5);
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            color: var(--text-primary);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
        }

        .brand-text {
            font-size: 0.98rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            line-height: 1.2;
            display: flex;
            flex-direction: column;
        }

        .brand-text .brand-main {
            font-size: 1.02rem;
            font-weight: 700;
        }

        .brand-text .brand-sub {
            font-size: 0.68rem;
            font-weight: 400;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 30px;
            flex: 1;
            justify-content: center;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .main-nav li {
            margin: 0;
            padding: 0;
        }

        .main-nav a {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 2px;
            position: relative;
            letter-spacing: 0.01em;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            border-radius: 2px;
            transition: width var(--transition-base);
        }

        .main-nav a:hover,
        .main-nav a.active {
            color: var(--text-primary);
        }

        .main-nav a:hover::after,
        .main-nav a.active::after {
            width: 100%;
        }

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

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

        .btn-login {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 9px 14px;
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            border: none;
            background: transparent;
            cursor: pointer;
            font-family: var(--font-primary);
        }

        .btn-login:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

        .btn-signup {
            font-size: 0.88rem;
            font-weight: 700;
            color: #FFFFFF;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-primary), #0040C0);
            border: 1px solid rgba(0, 240, 255, 0.4);
            cursor: pointer;
            font-family: var(--font-primary);
            letter-spacing: 0.01em;
            box-shadow: 0 0 14px rgba(0, 82, 255, 0.35);
            transition: box-shadow var(--transition-fast), transform var(--transition-fast), background var(--transition-fast);
        }

        .btn-signup:hover {
            box-shadow: 0 0 22px rgba(0, 240, 255, 0.4);
            transform: translateY(-1px);
            background: linear-gradient(135deg, #0052FF, #0038A0);
        }

        .btn-signup:active,
        .btn-login:active {
            transform: translateY(0);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--text-primary);
            font-size: 1.25rem;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            font-family: var(--font-primary);
            line-height: 1;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .nav-toggle:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
        }

        @media (max-width: 1024px) {
            .main-nav {
                gap: 20px;
            }

            .main-nav a {
                font-size: 0.83rem;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                gap: 0;
                padding: 12px 24px 24px;
                border-bottom: 1px solid rgba(0, 240, 255, 0.15);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform var(--transition-slow), opacity var(--transition-base);
                z-index: 99;
                max-height: calc(100vh - var(--header-height));
                overflow-y: auto;
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .main-nav li {
                width: 100%;
            }

            .main-nav a {
                display: block;
                padding: 14px 4px;
                font-size: 1rem;
                font-weight: 500;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }

            .header-actions {
                gap: 6px;
            }

            .btn-login {
                padding: 8px 12px;
                font-size: 0.82rem;
            }

            .btn-signup {
                padding: 8px 16px;
                font-size: 0.82rem;
            }

            .brand-text .brand-sub {
                display: none;
            }

            .brand-text .brand-main {
                font-size: 0.86rem;
            }

            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 480px) {
            .btn-login {
                padding: 7px 10px;
                font-size: 0.78rem;
            }

            .btn-signup {
                padding: 7px 14px;
                font-size: 0.78rem;
                white-space: nowrap;
            }

            .header-inner {
                padding-left: 16px;
                padding-right: 16px;
                gap: 12px;
            }
        }

        /* ===== HERO ===== */
        .hero-section {
            padding: calc(var(--header-height) + 32px) 0 0 0;
            position: relative;
            background-image: linear-gradient(180deg, rgba(8, 9, 15, 0.85) 0%, rgba(8, 9, 15, 0.92) 100%),
                url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            min-height: 540px;
            display: flex;
            align-items: flex-start;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.12) 0%, transparent 40%, rgba(8, 9, 15, 0.3) 100%);
            pointer-events: none;
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 28px 24px 60px;
        }

        .hero-badge-row {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 22px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: 50px;
            padding: 6px 16px;
            letter-spacing: 0.04em;
            pointer-events: none;
        }

        .hero-badge.hot {
            color: #FFCC00;
            background: rgba(255, 204, 0, 0.08);
            border-color: rgba(255, 204, 0, 0.35);
        }

        .hero-title {
            font-size: clamp(1.9rem, 4.2vw, 3.1rem);
            font-weight: 800;
            line-height: 1.18;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin: 0 0 18px 0;
            max-width: 820px;
            text-shadow: 0 0 30px rgba(0, 82, 255, 0.3);
        }

        .hero-title .highlight {
            color: var(--accent-secondary);
            position: relative;
            display: inline-block;
        }

        .hero-subtitle {
            font-size: 1.1rem;
            line-height: 1.68;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 0 28px 0;
        }

        .hero-cta-row {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1rem;
            font-weight: 700;
            color: #FFFFFF;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, #0052FF 0%, #0040C0 50%, #0038A0 100%);
            border: 1px solid rgba(0, 240, 255, 0.45);
            cursor: pointer;
            font-family: var(--font-primary);
            letter-spacing: 0.01em;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.4);
            transition: box-shadow var(--transition-base), transform var(--transition-fast), border-color var(--transition-fast);
        }

        .btn-primary:hover {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.55);
            transform: translateY(-2px);
            border-color: rgba(0, 240, 255, 0.65);
            color: #FFFFFF;
        }

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

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 13px 24px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.04);
            border: 1.5px solid rgba(255, 255, 255, 0.22);
            cursor: pointer;
            font-family: var(--font-primary);
            letter-spacing: 0.01em;
            transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.4);
            color: var(--text-primary);
            transform: translateY(-1px);
        }

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

        .hero-stats-row {
            display: flex;
            align-items: stretch;
            gap: 28px;
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
            padding-right: 28px;
            border-right: 1px solid rgba(255, 255, 255, 0.1);
        }

        .hero-stat:last-child {
            border-right: none;
            padding-right: 0;
        }

        .hero-stat .stat-value {
            font-size: 1.65rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .hero-stat .stat-value .unit {
            font-size: 1rem;
            font-weight: 600;
            color: var(--accent-secondary);
            margin-left: 2px;
        }

        .hero-stat .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        @media (max-width: 1024px) {
            .hero-section {
                min-height: auto;
            }

            .hero-content {
                padding-top: 20px;
                padding-bottom: 48px;
            }

            .hero-title {
                font-size: 1.85rem;
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .hero-section {
                padding-top: calc(var(--header-height) + 16px);
            }

            .hero-content {
                padding: 16px 16px 40px;
            }

            .hero-title {
                font-size: 1.5rem;
                line-height: 1.22;
            }

            .hero-subtitle {
                font-size: 1rem;
                line-height: 1.6;
            }

            .hero-stats-row {
                gap: 16px;
            }

            .hero-stat {
                padding-right: 16px;
                border-right: 1px solid rgba(255, 255, 255, 0.08);
            }

            .hero-stat .stat-value {
                font-size: 1.35rem;
            }
        }

        @media (max-width: 480px) {
            .hero-stats-row {
                gap: 10px;
                flex-wrap: wrap;
            }

            .hero-stat {
                padding-right: 10px;
                border-right: 1px solid rgba(255, 255, 255, 0.06);
                min-width: calc(50% - 5px);
            }

            .hero-stat:nth-child(even) {
                border-right: none;
                padding-right: 0;
            }

            .hero-stat .stat-value {
                font-size: 1.2rem;
            }
        }

        /* ===== CARDS & BENEFITS ===== */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 10px;
        }

        .benefit-card {
            background: var(--bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 28px 26px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .benefit-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-secondary), transparent);
            opacity: 0;
            transition: opacity var(--transition-base);
        }

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

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

        .benefit-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.25), rgba(0, 240, 255, 0.12));
            border: 1px solid rgba(0, 240, 255, 0.35);
            border-radius: var(--radius-md);
            font-size: 1.3rem;
            color: var(--accent-secondary);
            margin-bottom: 18px;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
        }

        .benefit-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
            letter-spacing: -0.01em;
        }

        .benefit-card p {
            font-size: 0.94rem;
            line-height: 1.62;
            color: var(--text-secondary);
            margin: 0;
        }

        @media (max-width: 1024px) {
            .benefits-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }

        @media (max-width: 640px) {
            .benefits-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .benefit-card {
                padding: 22px 20px;
            }
        }

        /* ===== STEPS ===== */
        .steps-wrapper {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
            position: relative;
            margin-top: 10px;
        }

        .steps-wrapper::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 16.66%;
            right: 16.66%;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            opacity: 0.25;
            border-radius: 2px;
            z-index: 0;
        }

        .step-item {
            position: relative;
            z-index: 1;
            background: var(--bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 28px 26px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
        }

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

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-primary), #0038A0);
            border: 1px solid rgba(0, 240, 255, 0.5);
            border-radius: 50%;
            color: #FFFFFF;
            font-size: 0.95rem;
            font-weight: 800;
            margin-bottom: 16px;
            box-shadow: 0 0 16px rgba(0, 82, 255, 0.35);
        }

        .step-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
            letter-spacing: -0.01em;
        }

        .step-item p {
            font-size: 0.93rem;
            line-height: 1.62;
            color: var(--text-secondary);
            margin: 0;
        }

        @media (max-width: 1024px) {
            .steps-wrapper {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }

            .steps-wrapper::before {
                display: none;
            }
        }

        @media (max-width: 640px) {
            .steps-wrapper {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .step-item {
                padding: 22px 20px;
            }
        }

        /* ===== DATA ANALYSIS ===== */
        .data-section {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
        }

        .data-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: start;
        }

        .data-kpi-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .kpi-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .kpi-card:hover {
            border-color: var(--border-strong);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.15);
        }

        .kpi-value {
            font-size: 2.1rem;
            font-weight: 800;
            color: var(--accent-secondary);
            letter-spacing: -0.01em;
            line-height: 1.1;
            margin-bottom: 6px;
        }

        .kpi-card .kpi-label {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-muted);
            line-height: 1.4;
            margin: 0;
        }

        .case-cards {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .case-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 22px 24px;
            display: flex;
            align-items: center;
            gap: 18px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .case-card:hover {
            border-color: rgba(0, 240, 255, 0.45);
            box-shadow: var(--shadow-card-hover);
        }

        .case-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.3), rgba(0, 240, 255, 0.15));
            border: 1px solid rgba(0, 240, 255, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-secondary);
            flex-shrink: 0;
        }

        .case-info {
            flex: 1;
        }

        .case-info h4 {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 6px 0;
        }

        .case-info .case-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin: 0 0 4px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .case-info .case-result {
            font-size: 0.88rem;
            color: var(--accent-secondary);
            font-weight: 600;
            margin: 0;
        }

        .case-result .improved {
            color: #4CAF50;
            font-weight: 700;
        }

        @media (max-width: 1024px) {
            .data-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 640px) {
            .data-kpi-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .kpi-card {
                padding: 16px 14px;
            }

            .kpi-value {
                font-size: 1.6rem;
            }

            .case-card {
                flex-direction: column;
                text-align: center;
                align-items: center;
                padding: 18px 16px;
            }

            .case-avatar {
                margin-bottom: 6px;
            }
        }

        /* ===== NEWS / CMS ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 32px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-item {
            padding: 20px 24px;
            border: 1px solid rgba(0, 240, 255, 0.12);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background: var(--bg-card);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
        }

        .news-item:hover {
            border-color: rgba(0, 240, 255, 0.35);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
            transform: translateX(4px);
        }

        .news-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin: 0 0 6px 0;
            line-height: 1.4;
        }

        .news-item h4 a {
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }

        .news-item h4 a:hover {
            color: var(--accent-secondary);
        }

        .news-item .news-excerpt {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0 0 8px 0;
            line-height: 1.6;
        }

        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .news-item .news-meta .tag {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            background: rgba(0, 82, 255, 0.18);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: 50px;
            color: var(--accent-secondary);
            font-weight: 600;
            font-size: 0.72rem;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .sidebar-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
        }

        .sidebar-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 14px 0;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .sidebar-card ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .sidebar-card ul li {
            margin: 0;
            padding: 0;
        }

        .sidebar-card ul li a {
            font-size: 0.9rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.5;
            transition: color var(--transition-fast);
        }

        .sidebar-card ul li a:hover {
            color: var(--accent-secondary);
        }

        .sidebar-card ul li a::before {
            content: '▸';
            color: var(--accent-secondary);
            font-size: 0.8rem;
            line-height: 1.5;
            flex-shrink: 0;
        }

        .empty-state {
            text-align: center;
            color: var(--text-muted);
            font-size: 1rem;
            padding: 32px 16px;
            background: var(--bg-card);
            border: 1px dashed rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-md);
            margin: 0;
        }

        @media (max-width: 1024px) {
            .news-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .news-sidebar {
                flex-direction: row;
                flex-wrap: wrap;
            }

            .sidebar-card {
                flex: 1;
                min-width: 260px;
            }
        }

        @media (max-width: 640px) {
            .news-item {
                padding: 16px 18px;
            }

            .news-item h4 {
                font-size: 0.95rem;
            }

            .news-sidebar {
                flex-direction: column;
            }

            .sidebar-card {
                min-width: auto;
            }
        }

        /* ===== SCREENSHOT STAGE ===== */
        .screenshot-stage {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
        }

        .screenshot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 10px;
        }

        .screenshot-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.25);
            cursor: pointer;
            transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
            aspect-ratio: 16/9;
            background: var(--bg-card);
        }

        .screenshot-card:hover {
            border-color: rgba(0, 240, 255, 0.55);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.2);
            transform: translateY(-4px);
        }

        .screenshot-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-lg);
            transition: transform var(--transition-base);
            opacity: 0.88;
        }

        .screenshot-card:hover img {
            transform: scale(1.03);
            opacity: 1;
        }

        .screenshot-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 14px 16px;
            background: linear-gradient(180deg, rgba(8,9,15,0) 0%, rgba(8,9,15,0.88) 70%);
            z-index: 2;
        }

        .screenshot-overlay span {
            font-size: 0.88rem;
            font-weight: 700;
            color: var(--text-primary);
            display: block;
            line-height: 1.4;
        }

        .screenshot-overlay small {
            font-size: 0.75rem;
            color: var(--accent-secondary);
            display: block;
            margin-top: 2px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 10px;
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--border-strong);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.12);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            background: transparent;
            border: none;
            font-family: var(--font-primary);
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            text-align: left;
            width: 100%;
            transition: color var(--transition-fast);
        }

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

        .faq-question .faq-icon {
            font-size: 1.5rem;
            font-weight: 300;
            color: var(--accent-secondary);
            flex-shrink: 0;
            transition: transform var(--transition-fast);
            line-height: 1;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 22px;
        }

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

        .faq-answer p {
            font-size: 0.95rem;
            line-height: 1.65;
            color: var(--text-secondary);
            margin: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
        }

        .cta-wrapper {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .cta-info h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-primary);
            margin: 0 0 12px 0;
            letter-spacing: -0.02em;
        }

        .cta-info p {
            font-size: 1.05rem;
            line-height: 1.68;
            color: var(--text-secondary);
            margin: 0 0 24px 0;
            max-width: 520px;
        }

        .cta-form {
            background: var(--bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 28px 26px;
            box-shadow: var(--shadow-card-hover);
        }

        .cta-form h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 18px 0;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 14px;
            font-size: 0.95rem;
            font-family: var(--font-primary);
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: var(--radius-sm);
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            box-sizing: border-box;
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--accent-secondary);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1);
        }

        .form-group textarea {
            resize: vertical;
            min-height: 110px;
        }

        .form-submit {
            width: 100%;
            padding: 14px 20px;
            font-size: 1rem;
            font-weight: 700;
            color: #FFFFFF;
            background: linear-gradient(135deg, #0052FF 0%, #0040C0 50%, #0038A0 100%);
            border: 1px solid rgba(0, 240, 255, 0.45);
            border-radius: var(--radius-md);
            cursor: pointer;
            font-family: var(--font-primary);
            letter-spacing: 0.02em;
            box-shadow: 0 0 18px rgba(0, 82, 255, 0.35);
            transition: box-shadow var(--transition-base), transform var(--transition-fast);
        }

        .form-submit:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.45);
            transform: translateY(-2px);
        }

        .form-submit:active {
            transform: translateY(0);
        }

        .form-note {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 10px;
            text-align: center;
            margin-bottom: 0;
        }

        /* ===== FOOTER ===== */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 240, 255, 0.12);
            padding: 48px 0 28px;
            position: relative;
        }

        .footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-secondary), transparent);
            opacity: 0.35;
        }

        .footer-inner {
            display: flex;
            flex-direction: column;
            gap: 36px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 28px;
            align-items: start;
        }

        .footer-brand .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            color: var(--text-secondary);
            margin: 0 0 16px 0;
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: 50%;
            color: var(--text-secondary);
            font-size: 1rem;
            transition: color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .footer-social a:hover {
            color: var(--accent-secondary);
            border-color: var(--accent-secondary);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px 0;
            letter-spacing: 0.01em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li {
            margin: 0;
            padding: 0;
        }

        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

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

        .footer-license {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
            padding: 18px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
        }

        .footer-license a {
            color: var(--text-muted);
            text-decoration: underline;
            transition: color var(--transition-fast);
        }

        .footer-license a:hover {
            color: var(--accent-secondary);
        }

        .footer-copyright {
            font-size: 0.78rem;
            color: var(--text-muted);
            text-align: center;
            margin: 0;
        }

        /* ===== FAB ===== */
        .fab {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
            border-radius: 50%;
            color: #00F0FF;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            opacity: 0.6;
            transition: opacity var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base), border-image var(--transition-base);
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.05);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
            border-image: linear-gradient(135deg, #FF007F, #00F0FF) 1;
        }

        .fab:active {
            transform: scale(0.95);
        }

        .fab .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            box-shadow: 0 0 8px rgba(255, 0, 127, 0.7);
            animation: fabPulse 1.8s infinite;
        }

        @keyframes fabPulse {
            0% { opacity: 1; }
            50% { opacity: 0.4; }
            100% { opacity: 1; }
        }

        @media (max-width: 640px) {
            .fab {
                width: 48px;
                height: 48px;
                left: 0.75rem;
                bottom: 5rem;
                font-size: 1.3rem;
            }
        }

        /* ===== Quick Answers ===== */
        .quick-accordion {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 10px;
        }

        .accordion-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .accordion-item:hover {
            border-color: var(--border-strong);
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.1);
        }

        .accordion-toggle {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            cursor: pointer;
            background: transparent;
            border: none;
            font-family: var(--font-primary);
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-primary);
            text-align: left;
            width: 100%;
            transition: color var(--transition-fast);
        }

        .accordion-toggle:hover {
            color: var(--accent-secondary);
        }

        .accordion-toggle .accordion-icon {
            font-size: 1.3rem;
            color: var(--accent-secondary);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

        .accordion-item.open .accordion-toggle .accordion-icon {
            transform: rotate(45deg);
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 20px;
        }

        .accordion-item.open .accordion-content {
            max-height: 250px;
            padding: 0 20px 16px;
        }

        .accordion-content p {
            font-size: 0.9rem;
            line-height: 1.62;
            color: var(--text-secondary);
            margin: 0;
        }

        /* ===== Data Table ===== */
        .data-table-wrapper {
            margin-top: 10px;
            overflow-x: auto;
        }

        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            min-width: 560px;
        }

        .data-table thead th {
            background: rgba(0, 82, 255, 0.15);
            border: 1px solid rgba(0, 240, 255, 0.15);
            color: var(--text-primary);
            font-weight: 700;
            padding: 12px 14px;
            text-align: left;
            font-size: 0.82rem;
            letter-spacing: 0.02em;
        }

        .data-table tbody td {
            border: 1px solid rgba(255, 255, 255, 0.06);
            padding: 12px 14px;
            color: var(--text-secondary);
            transition: background var(--transition-fast);
        }

        .data-table tbody tr:hover td {
            background: rgba(0, 240, 255, 0.05);
        }

        .data-table .status-badge {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: 50px;
            font-size: 0.72rem;
            font-weight: 600;
            background: rgba(76, 175, 80, 0.15);
            color: #8BC34A;
            border: 1px solid rgba(76, 175, 80, 0.3);
        }

        /* ===== Responsive for CTA, Footer, etc ===== */
        @media (max-width: 1024px) {
            .cta-wrapper {
                grid-template-columns: 1fr;
            }

            .footer-top {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .cta-info h2 {
                font-size: 1.5rem;
            }

            .screenshot-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            .screenshot-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .hero-stats-row {
                flex-direction: column;
                gap: 8px;
            }

            .hero-stat {
                border-right: none;
                padding-right: 0;
                padding-bottom: 8px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
            }

            .hero-stat:last-child {
                border-bottom: none;
            }

            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
                padding: 13px 20px;
                font-size: 0.95rem;
            }

            .hero-cta-row {
                flex-direction: column;
                width: 100%;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(22, 28, 45, 0.88);
            --bg-glass: rgba(13, 17, 30, 0.72);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-tertiary: #CCFF00;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #7A8EA8;
            --border-glow: rgba(0, 240, 255, 0.18);
            --border-strong: rgba(0, 240, 255, 0.35);
            --shadow-primary: 0 0 20px rgba(0, 82, 255, 0.35);
            --shadow-cyan: 0 0 16px rgba(0, 240, 255, 0.3);
            --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.55), 0 0 24px rgba(0, 240, 255, 0.12);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --font-primary: 'Inter', 'Segoe UI', 'Arial', sans-serif;
            --font-display: 'Inter', 'Segoe UI', 'Arial', sans-serif;
            --transition-fast: 180ms ease;
            --transition-base: 260ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 420ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-padding: 88px;
            --section-padding-mob: 56px;
            --container-max: 1240px;
            --header-height: 72px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.62;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 0%, rgba(0, 82, 255, 0.06) 0%, transparent 55%),
                radial-gradient(ellipse at 85% 10%, rgba(0, 240, 255, 0.05) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 82, 255, 0.04) 0%, transparent 45%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
            padding-bottom: 76px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent-secondary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--text-primary);
        }
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--section-padding) 0;
            position: relative;
        }
        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-secondary);
            font-weight: 600;
            padding: 6px 14px;
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid rgba(0, 240, 255, 0.22);
            border-radius: 50px;
            margin-bottom: 18px;
            pointer-events: none;
        }
        .section-title {
            font-size: clamp(1.65rem, 3vw, 2.25rem);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin: 0 0 18px 0;
            letter-spacing: -0.01em;
        }
        .section-desc {
            font-size: 1.05rem;
            line-height: 1.65;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 0 38px 0;
        }
        .section-desc.centered {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        /* ===== HEADER NAV ===== */
        .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, 0.1);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-base), border-color var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            border-bottom-color: rgba(0, 240, 255, 0.2);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            color: var(--text-primary);
        }
        .brand-logo:hover {
            color: var(--text-primary);
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.35), rgba(0, 240, 255, 0.2));
            border: 1.5px solid rgba(0, 240, 255, 0.5);
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            color: var(--text-primary);
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        .brand-main {
            font-size: 0.95rem;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .brand-sub {
            font-size: 0.68rem;
            font-weight: 400;
            color: var(--accent-secondary);
            letter-spacing: 0.03em;
            opacity: 0.8;
        }
        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .main-nav a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 550;
            padding: 8px 0;
            position: relative;
            transition: color var(--transition-fast);
        }
        .main-nav a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent-secondary);
            border-radius: 2px;
            transition: width var(--transition-base);
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--text-primary);
        }
        .main-nav a:hover::after,
        .main-nav a.active::after {
            width: 100%;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background var(--transition-fast), border-color var(--transition-fast);
        }
        .nav-toggle:hover {
            background: rgba(0, 240, 255, 0.05);
            border-color: var(--border-strong);
        }
        .nav-toggle i {
            font-size: 1.2rem;
            pointer-events: none;
        }
        /* ===== HERO ===== */
        .hero {
            padding-top: calc(var(--header-height) + 40px);
            padding-bottom: 60px;
            background-image: linear-gradient(180deg, rgba(8,9,15,0.92) 0%, rgba(13,17,30,0.4) 100%), url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            position: relative;
            border-bottom: 1px solid rgba(0, 240, 255, 0.08);
        }
        .hero .container-custom {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 48px;
            align-items: center;
        }
        .hero-left {
            max-width: 580px;
        }
        .hero-title {
            font-size: clamp(2.2rem, 5vw, 3.4rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin: 0 0 20px 0;
            color: var(--text-primary);
        }
        .hero-sub {
            font-size: 1.15rem;
            line-height: 1.65;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }
        .hero-list {
            list-style: none;
            margin: 0 0 32px 0;
            padding: 0;
        }
        .hero-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-secondary);
            margin-bottom: 12px;
            font-size: 0.95rem;
        }
        .hero-list i {
            color: var(--accent-secondary);
            font-size: 1.1rem;
            margin-top: 3px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 14px 24px;
            border-radius: var(--radius-md);
            border: 1px solid transparent;
            cursor: pointer;
            transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-base), transform var(--transition-fast), border-color var(--transition-fast);
            text-decoration: none;
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: var(--accent-primary);
            color: #fff;
            border-color: rgba(0, 82, 255, 0.6);
            box-shadow: 0 0 18px rgba(0, 82, 255, 0.4);
        }
        .btn-primary:hover {
            background: #0040cc;
            color: #fff;
            box-shadow: 0 0 26px rgba(0, 82, 255, 0.6);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent-secondary);
            border-color: var(--border-strong);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.08);
            color: var(--text-primary);
            border-color: var(--accent-secondary);
        }
        .hero-right {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 24px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
        }
        .hero-cover {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 20px;
            border: 1px solid rgba(0, 240, 255, 0.18);
        }
        .hero-cover img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .lead-form-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 0 14px 0;
            color: var(--text-primary);
        }
        .lead-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .form-group label {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-secondary);
            letter-spacing: 0.02em;
        }
        .form-input {
            background: rgba(8, 9, 15, 0.7);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 0.95rem;
            color: var(--text-primary);
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .form-input::placeholder {
            color: var(--text-muted);
        }
        .form-input:focus {
            border-color: var(--accent-secondary);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1);
        }
        .form-note {
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.4;
        }
        /* ===== BENEFITS ===== */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 8px;
        }
        .benefit-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
        }
        .benefit-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .benefit-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.25), rgba(0, 240, 255, 0.12));
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-secondary);
            font-size: 1.4rem;
            margin-bottom: 18px;
        }
        .benefit-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin: 0 0 10px 0;
            color: var(--text-primary);
        }
        .benefit-card p {
            margin: 0;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.6;
        }
        /* ===== STEPS ===== */
        .steps-flow {
            position: relative;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .steps-flow li {
            position: relative;
            padding-left: 40px;
            padding-bottom: 32px;
            border-left: 2px solid rgba(0, 240, 255, 0.15);
            margin-left: 18px;
        }
        .steps-flow li:last-child {
            padding-bottom: 0;
            border-left-color: transparent;
        }
        .steps-flow li::before {
            content: attr(data-step);
            position: absolute;
            left: -20px;
            top: 0;
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-secondary);
            border: 1.5px solid var(--border-strong);
            border-radius: 50%;
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--accent-secondary);
            z-index: 2;
        }
        .steps-flow h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin: 0 0 8px 0;
            color: var(--text-primary);
        }
        .steps-flow p {
            margin: 0;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.6;
        }
        /* ===== SCENARIOS ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: stretch;
        }
        .scenario-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-glow);
            box-shadow: 0 16px 40px rgba(0,0,0,0.35);
        }
        .scenario-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .scenario-content {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .scenario-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .scenario-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
        }
        .scenario-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin: 0 0 6px 0;
            color: var(--text-primary);
        }
        .scenario-item p {
            margin: 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }
        /* ===== SOCIAL PROOF ===== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 14px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }
        .testimonial-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
        }
        .testimonial-quote {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #fff;
            font-size: 1rem;
        }
        .testimonial-name {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-primary);
        }
        .testimonial-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0;
        }
        .faq-item {
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            background: var(--bg-card);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-strong);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition-fast);
        }
        .faq-question:hover {
            background: rgba(0, 240, 255, 0.04);
        }
        .faq-question i {
            color: var(--accent-secondary);
            font-size: 1.1rem;
            transition: transform var(--transition-base);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 22px;
        }
        .faq-answer p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.65;
            margin: 0;
            padding-bottom: 18px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-glow);
            text-align: center;
        }
        .cta-section .section-title {
            margin-bottom: 16px;
        }
        .cta-section .section-desc {
            margin-left: auto;
            margin-right: auto;
        }
        /* ===== FOOTER ===== */
        .footer {
            background: #0A0C14;
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            padding: 56px 0 24px;
            margin-top: 0;
        }
        .footer-inner {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.3fr 0.9fr 0.9fr 1fr;
            gap: 32px;
        }
        .footer-brand .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.35), rgba(0, 240, 255, 0.2));
            border: 1.5px solid rgba(0, 240, 255, 0.5);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 1rem;
        }
        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.65;
            margin: 0 0 18px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid var(--border-glow);
            color: var(--text-secondary);
            transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
        }
        .footer-social a:hover {
            color: var(--accent-secondary);
            border-color: var(--border-strong);
            background: rgba(0, 240, 255, 0.05);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 14px 0;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--accent-secondary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(0, 240, 255, 0.06);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        /* ===== FIXED BOTTOM CTA ===== */
        .bottom-cta-bar {
            position: fixed;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 90;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 10px 0;
            display: none;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .bottom-cta-bar.active {
            display: flex;
        }
        .bottom-cta-text {
            color: var(--text-secondary);
            font-size: 0.85rem;
            margin: 0;
        }
        /* ===== RESPONSIVE ===== */
        @media screen and (max-width: 1024px) {
            .hero .container-custom {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero-left {
                max-width: 100%;
            }
            .benefits-grid,
            .testimonial-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media screen and (max-width: 768px) {
            :root {
                --section-padding: var(--section-padding-mob);
                --header-height: 64px;
            }
            body {
                padding-bottom: 80px;
            }
            .header-inner {
                gap: 12px;
            }
            .brand-sub {
                display: none;
            }
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.97);
                border-bottom: 1px solid var(--border-glow);
                max-height: 0;
                overflow: hidden;
                transition: max-height var(--transition-base);
                box-shadow: 0 12px 30px rgba(0,0,0,0.5);
            }
            .main-nav.open {
                max-height: 400px;
            }
            .main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 16px 24px;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                display: block;
                padding: 14px 0;
                border-bottom: 1px solid rgba(0, 240, 255, 0.06);
            }
            .nav-toggle {
                display: flex;
            }
            .hero {
                padding-top: calc(var(--header-height) + 24px);
                padding-bottom: 40px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .benefits-grid,
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .bottom-cta-bar {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
                padding: 12px 16px;
            }
        }
        @media screen and (max-width: 520px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-inner {
                padding-left: 16px;
                padding-right: 16px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(22, 28, 45, 0.88);
            --bg-glass: rgba(13, 17, 30, 0.72);
            --bg-elevated: rgba(26, 32, 50, 0.9);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-tertiary: #CCFF00;
            --accent-danger: #FF3B5C;
            --accent-warning: #FFB020;
            --accent-success: #2ED573;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #7A8EA8;
            --text-faint: #55657A;
            --border-glow: rgba(0, 240, 255, 0.18);
            --border-strong: rgba(0, 240, 255, 0.35);
            --border-subtle: rgba(0, 82, 255, 0.12);
            --shadow-primary: 0 0 20px rgba(0, 82, 255, 0.35);
            --shadow-cyan: 0 0 16px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.55), 0 0 24px rgba(0, 240, 255, 0.12);
            --shadow-glass: 0 0 30px rgba(0, 82, 255, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.04);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --radius-pill: 50px;
            --font-primary: 'Inter', 'Segoe UI', 'Arial', sans-serif;
            --font-display: 'Inter', 'Segoe UI', 'Arial', sans-serif;
            --transition-fast: 180ms ease;
            --transition-base: 260ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 420ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-padding: 88px;
            --section-padding-mob: 56px;
            --container-max: 1240px;
            --article-col-width: 720px;
            --sidebar-width: 340px;
            --header-height: 72px;
            --bottom-bar-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            scroll-padding-top: calc(var(--header-height) + 20px);
        }

        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.62;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 0%, rgba(0, 82, 255, 0.06) 0%, transparent 55%),
                radial-gradient(ellipse at 85% 10%, rgba(0, 240, 255, 0.05) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 82, 255, 0.04) 0%, transparent 45%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
            padding-bottom: var(--bottom-bar-height);
        }

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

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

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

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

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .article-container {
            max-width: calc(var(--article-col-width) + var(--sidebar-width) + 48px);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-padding) 0;
            position: relative;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-secondary);
            font-weight: 600;
            padding: 6px 14px;
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid rgba(0, 240, 255, 0.22);
            border-radius: var(--radius-pill);
            margin-bottom: 18px;
            pointer-events: none;
        }

        .section-title {
            font-size: clamp(1.65rem, 3vw, 2.25rem);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin: 0 0 18px 0;
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 1.05rem;
            line-height: 1.65;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 0 38px 0;
        }

        /* ===== HEADER NAV ===== */
        .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, 0.1);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            border-bottom-color: rgba(0, 240, 255, 0.2);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            color: var(--text-primary);
        }

        .brand-logo:hover {
            color: var(--text-primary);
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.35), rgba(0, 240, 255, 0.2));
            border: 1.5px solid rgba(0, 240, 255, 0.5);
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            color: var(--text-primary);
            transition: box-shadow var(--transition-fast);
        }

        .brand-logo:hover .brand-icon {
            box-shadow: var(--shadow-cyan);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-main {
            font-size: 0.98rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .brand-sub {
            font-size: 0.68rem;
            color: var(--text-muted);
            font-weight: 500;
            letter-spacing: 0.02em;
        }

        .main-nav {
            flex: 1;
            display: flex;
            justify-content: center;
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .main-nav li {
            list-style: none;
            margin: 0;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 15px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: var(--radius-pill);
            transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
        }

        .nav-link.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.08);
            border-color: rgba(0, 240, 255, 0.22);
        }

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

        .btn-login {
            padding: 9px 16px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: var(--radius-pill);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }

        .btn-signup {
            padding: 10px 20px;
            font-size: 0.88rem;
            font-weight: 700;
            color: #08090F;
            background: linear-gradient(135deg, var(--accent-secondary), #66B3FF);
            border-radius: var(--radius-pill);
            transition: box-shadow var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
            border: none;
        }

        .btn-signup:hover {
            box-shadow: var(--shadow-cyan);
            transform: translateY(-1px);
            color: #08090F;
        }

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

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-glow);
            color: var(--text-primary);
            font-size: 1.1rem;
            transition: background var(--transition-fast);
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* ===== BREADCRUMB ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--accent-secondary);
        }

        .breadcrumb .sep {
            color: var(--text-faint);
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 600;
        }

        /* ===== ARTICLE HERO ===== */
        .article-hero {
            padding: calc(var(--header-height) + 48px) 0 40px 0;
            background:
                radial-gradient(ellipse at 15% 30%, rgba(0, 82, 255, 0.06) 0%, transparent 55%),
                radial-gradient(ellipse at 85% 20%, rgba(0, 240, 255, 0.04) 0%, transparent 50%);
            border-bottom: 1px solid rgba(0, 240, 255, 0.06);
        }

        .article-hero-grid {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .article-hero-text {
            flex: 1;
            min-width: 0;
        }

        .article-hero-visual {
            flex-shrink: 0;
            width: 230px;
            position: relative;
        }

        .article-hero-visual .frame {
            width: 100%;
            aspect-ratio: 3/4;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-strong);
            box-shadow: var(--shadow-card), 0 0 30px rgba(0, 240, 255, 0.08);
            background: var(--bg-card);
            position: relative;
        }

        .article-hero-visual .frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .article-hero-visual .frame:hover img {
            transform: scale(1.05);
        }

        .article-hero-visual .frame::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(8, 9, 15, 0.65));
            pointer-events: none;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: var(--accent-secondary);
            padding: 6px 14px;
            background: rgba(0, 240, 255, 0.07);
            border: 1px solid rgba(0, 240, 255, 0.28);
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
        }

        .article-hero h1 {
            font-size: clamp(1.7rem, 3.4vw, 2.45rem);
            font-weight: 800;
            line-height: 1.22;
            color: var(--text-primary);
            margin: 0 0 16px 0;
            letter-spacing: -0.02em;
        }

        .article-hero-desc {
            font-size: 1.05rem;
            line-height: 1.65;
            color: var(--text-secondary);
            margin: 0 0 20px 0;
            max-width: 620px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px 22px;
            font-size: 0.83rem;
            color: var(--text-muted);
        }

        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .article-meta .meta-item i {
            color: var(--accent-secondary);
            font-size: 0.85rem;
        }

        /* ===== ARTICLE BODY LAYOUT ===== */
        .article-body-section {
            padding: 56px 0 72px 0;
        }

        .article-body-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) var(--sidebar-width);
            gap: 40px;
            align-items: start;
        }

        .article-main-col {
            min-width: 0;
            max-width: var(--article-col-width);
        }

        .article-sidebar {
            position: sticky;
            top: calc(var(--header-height) + 24px);
            display: flex;
            flex-direction: column;
            gap: 22px;
        }

        /* ===== ARTICLE CONTENT STYLES ===== */
        .article-content {
            font-size: 1.02rem;
            line-height: 1.68;
            color: var(--text-secondary);
            overflow-wrap: break-word;
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
            margin: 32px 0 14px 0;
            letter-spacing: -0.01em;
        }

        .article-content h2 {
            font-size: 1.5rem;
            border-left: 3px solid var(--accent-secondary);
            padding-left: 14px;
        }

        .article-content h3 {
            font-size: 1.22rem;
        }

        .article-content h4 {
            font-size: 1.05rem;
        }

        .article-content p {
            margin: 0 0 18px 0;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 20px 0;
            padding-left: 24px;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 8px;
            line-height: 1.62;
        }

        .article-content ul li::marker {
            color: var(--accent-secondary);
        }

        .article-content ol li::marker {
            color: var(--accent-secondary);
            font-weight: 700;
        }

        .article-content blockquote {
            margin: 24px 0;
            padding: 18px 22px;
            background: rgba(0, 240, 255, 0.04);
            border-left: 3px solid var(--accent-secondary);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--text-secondary);
            font-size: 0.98rem;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            box-shadow: var(--shadow-card);
        }

        .article-content a {
            color: var(--accent-secondary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--text-primary);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 0.9rem;
        }

        .article-content table th,
        .article-content table td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid var(--border-glow);
        }

        .article-content table th {
            color: var(--text-primary);
            font-weight: 700;
            background: rgba(255, 255, 255, 0.03);
        }

        .article-content table td {
            color: var(--text-secondary);
        }

        .article-content code {
            font-family: 'SF Mono', 'Consolas', monospace;
            font-size: 0.85em;
            background: rgba(0, 240, 255, 0.08);
            padding: 2px 7px;
            border-radius: var(--radius-sm);
            color: var(--accent-secondary);
        }

        .article-content pre {
            background: var(--bg-secondary);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            margin: 20px 0;
            overflow-x: auto;
            font-size: 0.88rem;
            line-height: 1.6;
        }

        .article-content pre code {
            background: none;
            padding: 0;
            color: var(--text-secondary);
        }

        /* ===== ARTICLE NOT FOUND ===== */
        .article-not-found {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-glass);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-glass);
        }

        .article-not-found .icon {
            font-size: 2.5rem;
            color: var(--accent-secondary);
            margin-bottom: 18px;
        }

        .article-not-found h2 {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 22px;
        }

        .article-not-found .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        /* ===== TIP BOX (static, after CMS content) ===== */
        .tip-box-section {
            margin-top: 36px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .tip-box {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 18px 20px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-glow);
            background: var(--bg-glass);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .tip-box:hover {
            border-color: var(--border-strong);
        }

        .tip-box .tip-icon {
            flex-shrink: 0;
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-secondary);
            border: 1px solid rgba(0, 240, 255, 0.25);
        }

        .tip-box .tip-body h3 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 4px 0;
        }

        .tip-box .tip-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.55;
            margin: 0;
        }

        .tip-box.warning {
            background: rgba(255, 59, 92, 0.05);
            border-color: rgba(255, 59, 92, 0.25);
        }

        .tip-box.warning .tip-icon {
            background: rgba(255, 59, 92, 0.12);
            color: var(--accent-danger);
            border-color: rgba(255, 59, 92, 0.3);
        }

        .tip-box.success {
            background: rgba(46, 213, 115, 0.05);
            border-color: rgba(46, 213, 115, 0.25);
        }

        .tip-box.success .tip-icon {
            background: rgba(46, 213, 115, 0.12);
            color: var(--accent-success);
            border-color: rgba(46, 213, 115, 0.3);
        }

        /* ===== SIDEBAR WIDGETS ===== */
        .sidebar-widget {
            background: var(--bg-glass);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 22px;
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast);
        }

        .sidebar-widget:hover {
            border-color: var(--border-strong);
        }

        .sidebar-widget .widget-title {
            font-size: 0.88rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: var(--accent-secondary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-widget .widget-title i {
            font-size: 0.82rem;
        }

        .sidebar-nav-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav-links a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 12px;
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-md);
            transition: background var(--transition-fast), color var(--transition-fast);
        }

        .sidebar-nav-links a:hover {
            background: rgba(0, 240, 255, 0.06);
            color: var(--text-primary);
        }

        .sidebar-nav-links a .arrow {
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: transform var(--transition-fast), color var(--transition-fast);
        }

        .sidebar-nav-links a:hover .arrow {
            transform: translateX(3px);
            color: var(--accent-secondary);
        }

        .sidebar-resource-card {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px;
            border-radius: var(--radius-md);
            background: rgba(0, 82, 255, 0.06);
            border: 1px solid var(--border-subtle);
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }

        .sidebar-resource-card:hover {
            border-color: var(--border-strong);
            background: rgba(0, 82, 255, 0.1);
        }

        .sidebar-resource-card .rc-icon {
            width: 42px;
            height: 42px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: rgba(0, 82, 255, 0.2);
            border: 1px solid rgba(0, 82, 255, 0.4);
            color: var(--accent-secondary);
            font-size: 1rem;
        }

        .sidebar-resource-card .rc-info h4 {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 2px 0;
        }

        .sidebar-resource-card .rc-info p {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin: 0;
        }

        .sidebar-cta-box {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.18), rgba(0, 240, 255, 0.08));
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-lg);
            padding: 22px;
            text-align: left;
        }

        .sidebar-cta-box h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .sidebar-cta-box p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.55;
        }

        /* ===== BUTTONS ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            font-size: 0.95rem;
            font-weight: 700;
            color: #08090F;
            background: linear-gradient(135deg, var(--accent-secondary), #66B3FF);
            border-radius: var(--radius-pill);
            border: none;
            transition: box-shadow var(--transition-fast), transform var(--transition-fast), filter var(--transition-fast);
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-cyan);
            transform: translateY(-1px);
            color: #08090F;
            filter: brightness(1.05);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.2);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 3px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--accent-secondary);
            background: transparent;
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-pill);
            transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-secondary);
            color: var(--text-primary);
        }

        .btn-outline:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 3px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 240, 255, 0.06);
            border-bottom: 1px solid rgba(0, 240, 255, 0.06);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 820px;
        }

        .faq-item {
            background: var(--bg-glass);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

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

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-primary);
            list-style: none;
            transition: color var(--transition-fast);
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-secondary);
            font-size: 0.8rem;
            transition: transform var(--transition-base);
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }

        .faq-item .faq-answer {
            padding: 0 22px 20px 22px;
            font-size: 0.92rem;
            line-height: 1.65;
            color: var(--text-secondary);
        }

        .faq-item .faq-answer p {
            margin: 0;
        }

        .faq-item .faq-answer ul {
            margin: 10px 0 0 0;
            padding-left: 20px;
        }

        .faq-item .faq-answer ul li {
            margin-bottom: 5px;
        }

        /* ===== CTA SECTION ===== */
        .cta-section {
            background:
                radial-gradient(ellipse at 30% 50%, rgba(0, 82, 255, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 40%, rgba(0, 240, 255, 0.06) 0%, transparent 55%);
        }

        .cta-container-inner {
            max-width: 820px;
            margin: 0 auto;
            padding: 40px;
            background: var(--bg-glass);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-glass);
        }

        .cta-container-inner h2 {
            font-size: clamp(1.5rem, 2.8vw, 2rem);
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .cta-container-inner p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 22px;
        }

        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }

        /* ===== FOOTER ===== */
        .footer {
            background: #05060A;
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            padding: 56px 0 30px 0;
            margin-bottom: 0;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-brand .brand-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.35), rgba(0, 240, 255, 0.2));
            border: 1.5px solid rgba(0, 240, 255, 0.5);
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            color: var(--text-primary);
        }

        .footer-brand .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .footer-brand .brand-main {
            font-size: 0.95rem;
            font-weight: 800;
            color: var(--text-primary);
        }

        .footer-brand .brand-sub {
            font-size: 0.68rem;
            color: var(--text-muted);
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 18px;
            max-width: 380px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
        }

        .footer-social a:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--border-strong);
            color: var(--accent-secondary);
        }

        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li {
            margin: 0;
        }

        .footer-col ul a {
            font-size: 0.87rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom p {
            font-size: 0.78rem;
            color: var(--text-faint);
            margin: 0;
        }

        .footer-payment-icons {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.78rem;
            color: var(--text-faint);
        }

        .footer-payment-icons .pay-badge {
            padding: 5px 10px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            font-weight: 600;
            color: var(--text-muted);
        }

        /* ===== FAB ===== */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 90;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-pill);
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.65), rgba(0, 0, 0, 0.65)), linear-gradient(135deg, var(--accent-tertiary), var(--accent-secondary));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            color: var(--accent-secondary);
            font-size: 1.15rem;
            cursor: pointer;
            opacity: 0.6;
            transition: opacity var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
            color: var(--accent-secondary);
        }

        .fab:active {
            transform: scale(0.95);
        }

        .fab .fab-dot {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent-danger);
            border: 2px solid var(--bg-primary);
            animation: fab-dot-blink 1.6s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { box-shadow: 0 0 15px rgba(0, 240, 255, 0.5); }
            50% { box-shadow: 0 0 28px rgba(0, 240, 255, 0.75); }
        }

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

        /* ===== BOTTOM FIXED CTA BAR ===== */
        .bottom-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 85;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid rgba(0, 240, 255, 0.18);
            height: var(--bottom-bar-height);
            display: flex;
            align-items: center;
            box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.5);
        }

        .bottom-cta-bar .inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .bottom-cta-bar .cta-text {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .bottom-cta-bar .cta-text i {
            color: var(--accent-secondary);
            font-size: 1rem;
        }

        .bottom-cta-bar .btn-primary-sm {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 20px;
            font-size: 0.85rem;
            font-weight: 700;
            color: #08090F;
            background: linear-gradient(135deg, var(--accent-secondary), #66B3FF);
            border-radius: var(--radius-pill);
            white-space: nowrap;
            transition: box-shadow var(--transition-fast), transform var(--transition-fast);
        }

        .bottom-cta-bar .btn-primary-sm:hover {
            box-shadow: var(--shadow-cyan);
            transform: translateY(-1px);
            color: #08090F;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            :root {
                --section-padding: 68px;
                --header-height: 64px;
                --container-max: 960px;
            }

            .article-body-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .article-sidebar {
                position: relative;
                top: auto;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .article-hero-grid {
                gap: 22px;
            }

            .article-hero-visual {
                width: 180px;
            }

            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 56px;
                --header-height: 60px;
                --container-max: 100%;
                --bottom-bar-height: 60px;
            }

            .container-custom,
            .article-container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .header-inner {
                padding-left: 18px;
                padding-right: 18px;
                gap: 12px;
            }

            .brand-main {
                font-size: 0.85rem;
            }

            .brand-sub {
                font-size: 0.58rem;
            }

            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }

            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.97);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                border-bottom: 1px solid rgba(0, 240, 255, 0.12);
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.55);
                transform: translateY(-120%);
                transition: transform var(--transition-base);
                z-index: 99;
                display: block;
                padding: 14px 18px;
                max-height: calc(100vh - var(--header-height));
                overflow-y: auto;
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
            }

            .nav-link {
                padding: 12px 16px;
                font-size: 0.9rem;
                border-radius: var(--radius-md);
                width: 100%;
            }

            .mobile-toggle {
                display: flex;
            }

            .header-actions .btn-login {
                padding: 8px 12px;
                font-size: 0.8rem;
            }

            .header-actions .btn-signup {
                padding: 8px 14px;
                font-size: 0.8rem;
            }

            .article-hero {
                padding: calc(var(--header-height) + 28px) 0 28px 0;
            }

            .article-hero-grid {
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
            }

            .article-hero-visual {
                width: 150px;
                order: -1;
            }

            .article-hero-visual .frame {
                aspect-ratio: 3/4;
                border-radius: var(--radius-md);
            }

            .article-body-section {
                padding: 36px 0 50px 0;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .footer {
                padding: 40px 0 24px 0;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .cta-container-inner {
                padding: 28px 20px;
            }

            .fab {
                width: 48px;
                height: 48px;
                left: 12px;
                bottom: 78px;
                font-size: 1rem;
            }

            .bottom-cta-bar .inner {
                padding-left: 16px;
                padding-right: 16px;
                gap: 10px;
            }

            .bottom-cta-bar .cta-text {
                font-size: 0.8rem;
                gap: 6px;
            }

            .bottom-cta-bar .btn-primary-sm {
                padding: 8px 14px;
                font-size: 0.78rem;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-padding: 44px;
                --bottom-bar-height: 56px;
            }

            .article-hero h1 {
                font-size: 1.45rem;
            }

            .article-hero-desc {
                font-size: 0.92rem;
            }

            .article-meta {
                font-size: 0.75rem;
                gap: 10px 14px;
            }

            .article-hero-visual {
                width: 130px;
            }

            .tip-box {
                padding: 14px 16px;
                flex-direction: column;
                gap: 10px;
            }

            .faq-item summary {
                padding: 15px 16px;
                font-size: 0.9rem;
            }

            .faq-item .faq-answer {
                padding: 0 16px 16px 16px;
                font-size: 0.85rem;
            }

            .btn-primary,
            .btn-outline {
                padding: 11px 20px;
                font-size: 0.85rem;
                width: 100%;
                justify-content: center;
            }

            .cta-buttons {
                flex-direction: column;
            }

            .cta-buttons .btn-primary,
            .cta-buttons .btn-outline {
                width: 100%;
            }

            .bottom-cta-bar .cta-text {
                font-size: 0.72rem;
            }

            .bottom-cta-bar .btn-primary-sm {
                padding: 7px 12px;
                font-size: 0.72rem;
            }

            .footer-payment-icons {
                flex-wrap: wrap;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(22, 28, 45, 0.88);
            --bg-glass: rgba(13, 17, 30, 0.72);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-tertiary: #CCFF00;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #7A8EA8;
            --border-glow: rgba(0, 240, 255, 0.18);
            --border-strong: rgba(0, 240, 255, 0.35);
            --shadow-primary: 0 0 20px rgba(0, 82, 255, 0.35);
            --shadow-cyan: 0 0 16px rgba(0, 240, 255, 0.3);
            --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.55), 0 0 24px rgba(0, 240, 255, 0.12);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --font-primary: 'Inter', 'Segoe UI', 'Arial', sans-serif;
            --font-display: 'Inter', 'Segoe UI', 'Arial', sans-serif;
            --transition-fast: 180ms ease;
            --transition-base: 260ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 420ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-padding: 88px;
            --section-padding-mob: 56px;
            --container-max: 1240px;
            --header-height: 72px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.62;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 0%, rgba(0, 82, 255, 0.06) 0%, transparent 55%),
                radial-gradient(ellipse at 85% 10%, rgba(0, 240, 255, 0.05) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 82, 255, 0.04) 0%, transparent 45%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
            padding-bottom: 76px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent-secondary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--text-primary);
        }
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--section-padding) 0;
            position: relative;
        }
        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-secondary);
            font-weight: 600;
            padding: 6px 14px;
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid rgba(0, 240, 255, 0.22);
            border-radius: 50px;
            margin-bottom: 18px;
            pointer-events: none;
        }
        .section-title {
            font-size: clamp(1.65rem, 3vw, 2.25rem);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin: 0 0 18px 0;
            letter-spacing: -0.01em;
        }
        .section-desc {
            font-size: 1.05rem;
            line-height: 1.65;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 0 38px 0;
        }
        .section-desc.centered {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        /* ===== HEADER ===== */
        .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, 0.1);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            border-bottom-color: rgba(0, 240, 255, 0.2);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            color: var(--text-primary);
        }
        .brand-logo:hover {
            color: var(--text-primary);
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.35), rgba(0, 240, 255, 0.2));
            border: 1.5px solid rgba(0, 240, 255, 0.5);
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            color: var(--text-primary);
            flex-shrink: 0;
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        .brand-main {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
        }
        .brand-sub {
            font-size: 0.7rem;
            color: var(--text-muted);
        }
        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .main-nav .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .main-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.06);
        }
        .main-nav .nav-link.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.08);
            border-color: rgba(0, 240, 255, 0.25);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 6px 10px;
            cursor: pointer;
            transition: background var(--transition-fast), border-color var(--transition-fast);
        }
        .nav-toggle:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--border-strong);
        }
        /* ===== BUTTONS ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            border: 1.5px solid transparent;
            cursor: pointer;
            transition: all var(--transition-base);
            text-align: center;
            line-height: 1.4;
            text-decoration: none !important;
            letter-spacing: 0.01em;
        }
        .btn:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.25);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-primary) 0%, #0066FF 50%, var(--accent-secondary) 120%);
            color: #fff;
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--shadow-primary);
        }
        .btn-primary:hover {
            color: #fff;
            box-shadow: 0 0 28px rgba(0, 82, 255, 0.55), 0 0 18px rgba(0, 240, 255, 0.25);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-primary);
        }
        .btn-secondary {
            background: rgba(0, 240, 255, 0.06);
            color: var(--accent-secondary);
            border-color: rgba(0, 240, 255, 0.3);
        }
        .btn-secondary:hover {
            background: rgba(0, 240, 255, 0.12);
            color: var(--text-primary);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-ghost {
            background: transparent;
            color: var(--text-secondary);
            border-color: transparent;
        }
        .btn-ghost:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }
        .btn-sm {
            padding: 9px 18px;
            font-size: 0.82rem;
        }
        /* ===== CARDS ===== */
        .glass-card {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
        }
        .glass-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .highlight-card {
            border-color: var(--accent-secondary) !important;
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.18), 0 8px 30px rgba(0, 0, 0, 0.4);
            position: relative;
        }
        .highlight-card:hover {
            box-shadow: 0 0 36px rgba(0, 240, 255, 0.3), 0 12px 40px rgba(0, 0, 0, 0.5);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.7rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            padding: 4px 10px;
            border-radius: 50px;
            pointer-events: none;
        }
        .badge-cyan {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.28);
        }
        .badge-lime {
            color: var(--accent-tertiary);
            background: rgba(204, 255, 0, 0.07);
            border: 1px solid rgba(204, 255, 0, 0.25);
        }
        .badge-muted {
            color: var(--text-muted);
            background: rgba(122, 142, 168, 0.1);
            border: 1px solid rgba(122, 142, 168, 0.2);
        }
        .badge-red {
            color: #FF6B6B;
            background: rgba(255, 107, 107, 0.08);
            border: 1px solid rgba(255, 107, 107, 0.25);
        }
        /* ===== TAG ===== */
        .status-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 50px;
            pointer-events: none;
        }
        .status-tag.success {
            color: #7CE38B;
            background: rgba(124, 227, 139, 0.08);
            border: 1px solid rgba(124, 227, 139, 0.25);
        }
        .status-tag.warning {
            color: #FFD166;
            background: rgba(255, 209, 102, 0.08);
            border: 1px solid rgba(255, 209, 102, 0.25);
        }
        .status-tag.danger {
            color: #FF6B6B;
            background: rgba(255, 107, 107, 0.08);
            border: 1px solid rgba(255, 107, 107, 0.25);
        }
        /* ===== HERO ===== */
        .hero {
            padding-top: calc(var(--header-height) + 56px);
            padding-bottom: 64px;
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.2), transparent);
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .hero-title {
            font-size: clamp(1.8rem, 4vw, 2.85rem);
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-primary);
            margin: 0 0 20px 0;
            letter-spacing: -0.02em;
        }
        .hero-title .accent {
            color: var(--accent-secondary);
        }
        .hero-desc {
            font-size: 1.08rem;
            line-height: 1.65;
            color: var(--text-secondary);
            margin: 0 0 30px 0;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 34px;
        }
        .hero-compare {
            display: grid;
            gap: 14px;
        }
        .compare-card {
            padding: 20px 22px;
            border-radius: var(--radius-md);
            background: var(--bg-glass);
            border: 1px solid var(--border-glow);
            cursor: default;
            transition: all var(--transition-base);
        }
        .compare-card:hover {
            border-color: var(--border-strong);
        }
        .compare-card .compare-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 8px;
            gap: 10px;
            flex-wrap: wrap;
        }
        .compare-card .compare-name {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
        }
        .compare-card .compare-desc {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .compare-card.highlight {
            border-color: var(--accent-secondary);
            box-shadow: var(--shadow-cyan);
            transform: scale(1.02);
        }
        .compare-card.highlight:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.35);
        }
        /* ===== SELLING POINTS ===== */
        .points-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .point-card {
            padding: 28px 24px;
            border-radius: var(--radius-md);
            background: var(--bg-glass);
            border: 1px solid var(--border-glow);
            transition: all var(--transition-base);
        }
        .point-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .point-icon {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            margin-bottom: 16px;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.25), rgba(0, 240, 255, 0.12));
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-secondary);
        }
        .point-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
            line-height: 1.3;
        }
        .point-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        /* ===== STEPS ===== */
        .steps-list {
            display: grid;
            gap: 20px;
            counter-reset: step-counter;
        }
        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 20px;
            border-radius: var(--radius-md);
            background: var(--bg-glass);
            border: 1px solid var(--border-glow);
            transition: all var(--transition-base);
            position: relative;
        }
        .step-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
        }
        .step-number {
            width: 40px;
            height: 40px;
            min-width: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            flex-shrink: 0;
            box-shadow: var(--shadow-primary);
        }
        .step-content h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 6px 0;
            line-height: 1.3;
        }
        .step-content p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }
        /* ===== STATS ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .stat-item {
            text-align: center;
            padding: 26px 20px;
            border-radius: var(--radius-md);
            background: var(--bg-glass);
            border: 1px solid var(--border-glow);
            transition: all var(--transition-base);
        }
        .stat-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-secondary);
            line-height: 1.2;
            margin: 0 0 6px 0;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        /* ===== FAQ ===== */
        .faq-list {
            display: grid;
            gap: 14px;
        }
        .faq-item {
            border-radius: var(--radius-md);
            background: var(--bg-glass);
            border: 1px solid var(--border-glow);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--border-strong);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-primary);
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-secondary);
        }
        .faq-question .fa-chevron-down {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }
        .faq-item.is-active .fa-chevron-down {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            padding: 0 20px;
        }
        .faq-item.is-active .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px 20px;
        }
        .faq-answer p {
            margin: 0;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.08) 0%, rgba(0, 240, 255, 0.04) 100%);
            border-top: 1px solid var(--border-glow);
            border-bottom: 1px solid var(--border-glow);
        }
        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
        }
        .cta-text h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
            line-height: 1.3;
        }
        .cta-text p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin: 0;
        }
        .cta-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
        }
        .cta-form input[type="email"] {
            min-width: 260px;
            padding: 12px 18px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-glow);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 0.9rem;
            font-family: var(--font-primary);
            transition: all var(--transition-base);
        }
        .cta-form input[type="email"]::placeholder {
            color: var(--text-muted);
        }
        .cta-form input[type="email"]:focus {
            outline: none;
            border-color: var(--accent-secondary);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.15);
        }
        /* ===== FOOTER ===== */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-glow);
            padding: 56px 0 24px 0;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        .footer-brand .brand-main {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
        }
        .footer-brand .brand-sub {
            font-size: 0.7rem;
            color: var(--text-muted);
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0 0 18px 0;
        }
        .footer-social {
            display: flex;
            gap: 8px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid var(--border-glow);
            color: var(--text-secondary);
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }
        .footer-social a:hover {
            color: var(--accent-secondary);
            border-color: var(--border-strong);
            background: rgba(0, 240, 255, 0.12);
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--text-primary);
            margin: 0 0 14px 0;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-secondary);
        }
        .footer-col p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        /* ===== FAB ===== */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 88px;
            z-index: 50;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            background: rgba(8, 9, 15, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #CCFF00, #0052FF) 1;
            border-radius: 50px;
            color: var(--text-primary);
            font-size: 0.85rem;
            font-weight: 600;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
            opacity: 0.6;
            transition: all var(--transition-base);
            min-width: 48px;
            min-height: 48px;
            justify-content: center;
            text-decoration: none !important;
        }
        .fab-support:hover {
            opacity: 1;
            color: var(--text-primary);
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.55), 0 0 40px rgba(0, 82, 255, 0.3);
            transform: scale(1.05);
        }
        .fab-support:active {
            transform: scale(0.95);
        }
        .fab-support .fab-icon {
            font-size: 1.1rem;
            color: var(--accent-secondary);
            animation: fab-glow 2s ease-in-out infinite;
        }
        .fab-support .fab-label {
            font-size: 0.75rem;
            letter-spacing: 0.03em;
        }
        .fab-support .fab-notice {
            position: absolute;
            top: -6px;
            right: -6px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #FF007F;
            border: 2px solid rgba(8, 9, 15, 0.8);
            animation: fab-blink 1.5s ease-in-out infinite;
        }
        @keyframes fab-glow {
            0%, 100% { opacity: 0.7; }
            50% { opacity: 1; text-shadow: 0 0 8px rgba(0, 240, 255, 0.7); }
        }
        @keyframes fab-blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        /* ===== BOTTOM CONVERSION BAR ===== */
        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 10px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }
        .bottom-bar .bar-text {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.4;
        }
        .bottom-bar .bar-text strong {
            color: var(--text-primary);
        }
        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .points-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-padding: var(--section-padding-mob);
                --header-height: 60px;
            }
            .header-inner {
                padding-left: 16px;
                padding-right: 16px;
            }
            .brand-main {
                font-size: 0.8rem;
            }
            .brand-sub {
                font-size: 0.6rem;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                padding: 16px 20px;
                border-bottom: 1px solid var(--border-glow);
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
            }
            .main-nav.is-open {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 4px;
                align-items: stretch;
            }
            .main-nav .nav-link {
                padding: 10px 14px;
                font-size: 0.9rem;
            }
            .hero {
                padding-top: calc(var(--header-height) + 32px);
                padding-bottom: 40px;
                min-height: auto;
            }
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .points-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .compare-card.highlight {
                transform: scale(1);
            }
            .cta-inner {
                flex-direction: column;
                text-align: center;
            }
            .cta-form {
                justify-content: center;
                width: 100%;
            }
            .cta-form input[type="email"] {
                min-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .bottom-bar {
                flex-direction: column;
                text-align: center;
                padding: 10px 14px;
            }
            .fab-support {
                bottom: 92px;
                left: 12px;
                padding: 8px 12px;
            }
            .fab-support .fab-label {
                display: none;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(22, 28, 45, 0.88);
            --bg-glass: rgba(13, 17, 30, 0.72);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-tertiary: #CCFF00;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #7A8EA8;
            --border-glow: rgba(0, 240, 255, 0.18);
            --border-strong: rgba(0, 240, 255, 0.35);
            --shadow-primary: 0 0 20px rgba(0, 82, 255, 0.35);
            --shadow-cyan: 0 0 16px rgba(0, 240, 255, 0.3);
            --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.55), 0 0 24px rgba(0, 240, 255, 0.12);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --font-primary: 'Inter', 'Segoe UI', 'Arial', sans-serif;
            --font-display: 'Inter', 'Segoe UI', 'Arial', sans-serif;
            --transition-fast: 180ms ease;
            --transition-base: 260ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 420ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-padding: 88px;
            --section-padding-mob: 56px;
            --container-max: 1240px;
            --header-height: 72px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.62;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 0%, rgba(0, 82, 255, 0.06) 0%, transparent 55%),
                radial-gradient(ellipse at 85% 10%, rgba(0, 240, 255, 0.05) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 82, 255, 0.04) 0%, transparent 45%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
            padding-bottom: 76px;
        }

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

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

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

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-padding) 0;
            position: relative;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-secondary);
            font-weight: 600;
            padding: 6px 14px;
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid rgba(0, 240, 255, 0.22);
            border-radius: 50px;
            margin-bottom: 18px;
            pointer-events: none;
        }

        .section-title {
            font-size: clamp(1.65rem, 3vw, 2.25rem);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin: 0 0 18px 0;
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 1.05rem;
            line-height: 1.65;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 0 38px 0;
        }

        /* ===== HEADER NAV ===== */
        .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, 0.1);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            border-bottom-color: rgba(0, 240, 255, 0.2);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            color: var(--text-primary);
        }

        .brand-logo:hover {
            color: var(--text-primary);
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.35), rgba(0, 240, 255, 0.2));
            border: 1.5px solid rgba(0, 240, 255, 0.5);
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            color: var(--text-primary);
            flex-shrink: 0;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-main {
            font-weight: 700;
            font-size: 1.02rem;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .brand-sub {
            font-size: 0.68rem;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .main-nav a.nav-link {
            display: inline-block;
            padding: 10px 16px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

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

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

        .main-nav a.nav-link.active::before {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 2px;
            background: var(--accent-secondary);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
        }

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

        .btn-login {
            padding: 9px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

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

        .btn-signup {
            padding: 9px 20px;
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 2px 12px rgba(0, 82, 255, 0.35);
        }

        .btn-signup:hover {
            box-shadow: 0 4px 24px rgba(0, 82, 255, 0.55);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--radius-sm);
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: var(--text-primary);
            font-size: 1.1rem;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .mobile-toggle:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--border-strong);
        }

        /* ===== HERO ===== */
        .hero-category {
            padding-top: calc(var(--header-height) + 72px);
            padding-bottom: 72px;
            position: relative;
            overflow: hidden;
            background:
                linear-gradient(180deg, rgba(8, 9, 15, 0.55) 0%, rgba(8, 9, 15, 0.82) 55%, var(--bg-primary) 100%),
                url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
        }

        .hero-category::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 40%, rgba(0, 82, 255, 0.12) 0%, transparent 55%);
            pointer-events: none;
        }

        .hero-category .container-custom {
            position: relative;
            z-index: 2;
        }

        .hero-cat-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .hero-cat-content h1 {
            font-size: clamp(1.9rem, 3.8vw, 2.9rem);
            font-weight: 800;
            line-height: 1.18;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin: 0 0 20px 0;
        }

        .hero-cat-content h1 span {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .hero-cat-desc {
            font-size: 1.08rem;
            line-height: 1.65;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 0 28px 0;
        }

        .hero-cat-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.4);
            white-space: nowrap;
        }

        .btn-primary-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 82, 255, 0.6), 0 0 24px rgba(0, 240, 255, 0.3);
            color: #fff;
        }

        .btn-outline-glow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 26px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--accent-secondary);
            background: transparent;
            border: 1.5px solid rgba(0, 240, 255, 0.4);
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }

        .hero-stage-panel {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 28px;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.04);
        }

        .hero-stage-panel h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 6px 0;
        }

        .hero-stage-panel .stage-sub {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .stage-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(0, 240, 255, 0.08);
            transition: all var(--transition-fast);
        }

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

        .stage-item:hover {
            background: rgba(0, 240, 255, 0.03);
            padding-left: 6px;
            border-radius: var(--radius-sm);
        }

        .stage-dot {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.82rem;
            font-weight: 700;
            flex-shrink: 0;
            border: 2px solid;
            transition: all var(--transition-fast);
        }

        .stage-dot.bronze {
            background: rgba(205, 127, 50, 0.18);
            border-color: #CD7F32;
            color: #E8A35D;
        }

        .stage-dot.gold {
            background: rgba(255, 215, 0, 0.15);
            border-color: #FFD700;
            color: #FFD700;
        }

        .stage-dot.diamond {
            background: rgba(0, 240, 255, 0.15);
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
        }

        .stage-info h4 {
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 3px 0;
        }

        .stage-info p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.5;
        }

        /* ===== SELLING POINTS ===== */
        .selling-section {
            background: var(--bg-primary);
        }

        .selling-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .selling-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 30px 26px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

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

        .selling-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

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

        .selling-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.25), rgba(0, 240, 255, 0.15));
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-md);
            margin-bottom: 18px;
            color: var(--accent-secondary);
        }

        .selling-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
        }

        .selling-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* ===== SCENARIO SECTION ===== */
        .scenario-section {
            background: var(--bg-secondary);
            position: relative;
        }

        .scenario-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.2), transparent);
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 40px;
        }

        .scenario-tab {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            cursor: pointer;
            position: relative;
        }

        .scenario-tab:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .scenario-tab-img {
            position: relative;
            height: 190px;
            overflow: hidden;
        }

        .scenario-tab-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .scenario-tab:hover .scenario-tab-img img {
            transform: scale(1.06);
        }

        .scenario-tab-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 30%, rgba(8, 9, 15, 0.85) 100%);
            pointer-events: none;
        }

        .scenario-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 6px 14px;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: 50px;
            z-index: 2;
            letter-spacing: 0.02em;
        }

        .scenario-badge.rank-bronze {
            background: rgba(205, 127, 50, 0.85);
            color: #fff;
        }

        .scenario-badge.rank-gold {
            background: rgba(255, 215, 0, 0.85);
            color: #1a1a1a;
        }

        .scenario-badge.rank-diamond {
            background: rgba(0, 240, 255, 0.85);
            color: #08090F;
        }

        .scenario-tab-body {
            padding: 22px;
        }

        .scenario-tab-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px 0;
        }

        .scenario-tab-body p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .scenario-tab-body .scenario-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .scenario-tab-body .scenario-meta i {
            color: var(--accent-secondary);
            margin-right: 4px;
        }

        /* ===== SOCIAL PROOF ===== */
        .proof-section {
            background: var(--bg-primary);
            position: relative;
        }

        .proof-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
            margin-top: 40px;
        }

        .proof-stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .proof-stat-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .proof-stat-card:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.15);
        }

        .proof-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-secondary);
            letter-spacing: -0.02em;
            line-height: 1.1;
            margin-bottom: 6px;
        }

        .proof-stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.4;
        }

        .proof-testimonials {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .testimonial-item {
            background: var(--bg-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            transition: all var(--transition-fast);
        }

        .testimonial-item:hover {
            border-color: var(--border-strong);
        }

        .testimonial-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0 0 10px 0;
            font-style: italic;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .testimonial-avatar {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
        }

        .testimonial-name {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .testimonial-rank {
            font-size: 0.72rem;
            color: var(--accent-secondary);
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-secondary);
            position: relative;
        }

        .faq-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.2), transparent);
        }

        .faq-list {
            max-width: 780px;
            margin: 40px auto 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: all var(--transition-fast);
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-secondary);
            font-size: 0.75rem;
            transition: all var(--transition-base);
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            background: rgba(0, 240, 255, 0.2);
        }

        .faq-answer {
            display: none;
            padding: 0 22px 20px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .faq-item.active .faq-answer {
            display: block;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-6px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* ===== CTA SECTION ===== */
        .cta-section {
            background: var(--bg-primary);
            padding: 60px 0;
        }

        .cta-banner {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.25), rgba(0, 240, 255, 0.12));
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-banner h2 {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 800;
            color: var(--text-primary);
            margin: 0 0 14px 0;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.6;
            position: relative;
            z-index: 1;
        }

        .cta-banner .btn-primary-glow {
            position: relative;
            z-index: 1;
        }

        /* ===== STICKY CTA BAR ===== */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(8, 9, 15, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 14px 24px;
            display: none;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
        }

        .sticky-cta-text {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.4;
            flex: 1;
            min-width: 0;
        }

        .sticky-cta-text strong {
            color: var(--text-primary);
            display: block;
            font-size: 0.92rem;
        }

        .sticky-cta-bar .btn-primary-glow {
            padding: 10px 22px;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        /* ===== FAB ===== */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 80;
            width: 52px;
            height: 52px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(8, 9, 15, 0.65);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            cursor: pointer;
            font-size: 1.3rem;
            color: var(--accent-secondary);
            position: relative;
            transition: all var(--transition-base);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.25);
        }

        .fab-left::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary), var(--accent-secondary));
            background-size: 300% 300%;
            animation: gradientFlow 4s ease infinite;
            z-index: -1;
        }

        @keyframes gradientFlow {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .fab-left:hover {
            opacity: 1;
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.5);
            transform: scale(1.08);
        }

        .fab-left .fab-badge {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: #FF007F;
            border: 2px solid var(--bg-primary);
            animation: pulseBadge 2s ease infinite;
        }

        @keyframes pulseBadge {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        /* ===== FOOTER ===== */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 240, 255, 0.12);
            padding: 60px 0 0;
            position: relative;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.35), rgba(0, 240, 255, 0.2));
            border: 1.5px solid rgba(0, 240, 255, 0.5);
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            color: var(--text-primary);
            flex-shrink: 0;
        }

        .footer-brand .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .footer-brand .brand-main {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
        }

        .footer-brand .brand-sub {
            font-size: 0.65rem;
            color: var(--text-muted);
        }

        .footer-brand p {
            font-size: 0.84rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0 0 18px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: 50%;
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .footer-social a:hover {
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.06);
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 16px 0;
            text-transform: uppercase;
            letter-spacing: 0.03em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            font-size: 0.84rem;
            color: var(--text-muted);
            transition: all var(--transition-fast);
        }

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

        .footer-col p {
            font-size: 0.84rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.5;
        }

        .footer-bottom a {
            color: var(--text-secondary);
        }

        .footer-bottom a:hover {
            color: var(--accent-secondary);
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            :root {
                --section-padding: 72px;
                --section-padding-mob: 48px;
            }

            .hero-cat-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .hero-cat-content {
                text-align: left;
            }

            .hero-cat-desc {
                max-width: 100%;
            }

            .selling-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 18px;
            }

            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 56px;
                --section-padding-mob: 40px;
                --header-height: 64px;
            }

            body {
                padding-bottom: 72px;
            }

            .main-nav {
                display: none;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.97);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                border-bottom: 1px solid rgba(0, 240, 255, 0.15);
                padding: 16px 24px;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
                z-index: 99;
            }

            .main-nav.open {
                display: block;
                animation: slideDown 0.25s ease;
            }

            @keyframes slideDown {
                from { opacity: 0; transform: translateY(-10px); }
                to { opacity: 1; transform: translateY(0); }
            }

            .main-nav ul {
                flex-direction: column;
                gap: 4px;
                align-items: stretch;
            }

            .main-nav a.nav-link {
                display: block;
                padding: 12px 16px;
                font-size: 0.92rem;
            }

            .main-nav a.nav-link.active::before {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .header-actions .btn-login,
            .header-actions .btn-signup {
                padding: 8px 14px;
                font-size: 0.78rem;
            }

            .brand-main {
                font-size: 0.88rem;
            }

            .brand-sub {
                font-size: 0.6rem;
            }

            .hero-category {
                padding-top: calc(var(--header-height) + 48px);
                padding-bottom: 48px;
            }

            .hero-cat-content h1 {
                font-size: 1.7rem;
            }

            .hero-cat-desc {
                font-size: 0.95rem;
            }

            .hero-cat-actions {
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
            }

            .btn-primary-glow,
            .btn-outline-glow {
                justify-content: center;
                width: 100%;
                padding: 13px 20px;
                font-size: 0.9rem;
            }

            .hero-stage-panel {
                padding: 20px;
            }

            .selling-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .selling-card {
                padding: 22px 20px;
            }

            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .scenario-tab-img {
                height: 170px;
            }

            .proof-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .proof-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }

            .proof-stat-card {
                padding: 20px 16px;
            }

            .proof-stat-number {
                font-size: 1.5rem;
            }

            .cta-banner {
                padding: 32px 22px;
            }

            .cta-banner h2 {
                font-size: 1.35rem;
            }

            .sticky-cta-bar {
                display: flex;
                padding: 12px 16px;
                gap: 10px;
            }

            .sticky-cta-text {
                font-size: 0.78rem;
            }

            .sticky-cta-text strong {
                font-size: 0.82rem;
            }

            .sticky-cta-bar .btn-primary-glow {
                padding: 9px 16px;
                font-size: 0.78rem;
                white-space: nowrap;
            }

            .fab-left {
                bottom: 76px;
                width: 46px;
                height: 46px;
                font-size: 1.1rem;
                left: 12px;
            }

            .footer {
                padding: 40px 0 0;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-padding: 44px;
                --section-padding-mob: 32px;
            }

            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }

            .header-inner {
                padding-left: 14px;
                padding-right: 14px;
                gap: 10px;
            }

            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }

            .brand-main {
                font-size: 0.78rem;
            }

            .brand-sub {
                font-size: 0.55rem;
            }

            .header-actions .btn-login,
            .header-actions .btn-signup {
                padding: 7px 10px;
                font-size: 0.72rem;
            }

            .mobile-toggle {
                width: 36px;
                height: 36px;
                font-size: 0.95rem;
            }

            .hero-category {
                padding-top: calc(var(--header-height) + 36px);
                padding-bottom: 36px;
            }

            .hero-cat-content h1 {
                font-size: 1.45rem;
            }

            .hero-cat-desc {
                font-size: 0.88rem;
            }

            .section-title {
                font-size: 1.35rem;
            }

            .section-desc {
                font-size: 0.92rem;
            }

            .selling-icon {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }

            .proof-stats {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .proof-stat-card {
                padding: 16px 12px;
            }

            .proof-stat-number {
                font-size: 1.3rem;
            }

            .sticky-cta-text {
                font-size: 0.72rem;
            }

            .sticky-cta-bar .btn-primary-glow {
                font-size: 0.72rem;
                padding: 8px 12px;
            }

            .faq-question {
                padding: 15px 16px;
                font-size: 0.88rem;
            }

            .faq-answer {
                padding: 0 16px 16px;
                font-size: 0.82rem;
            }
        }