/* roulang page: index */
:root {
            --color-bg: #08090F;
            --color-bg-secondary: #0D111E;
            --color-surface: rgba(13, 17, 30, 0.72);
            --color-surface-solid: #0D111E;
            --color-primary: #0052FF;
            --color-primary-hover: #1A66FF;
            --color-accent: #00F0FF;
            --color-accent-hover: #33F4FF;
            --color-gold: #FFD700;
            --color-red: #FF3B5C;
            --color-text: #FFFFFF;
            --color-text-secondary: #CBD5E1;
            --color-text-muted: #8A94A6;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-glow: rgba(0, 240, 255, 0.35);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 24px rgba(0, 240, 255, 0.25);
            --shadow-glow-strong: 0 0 40px rgba(0, 82, 255, 0.45);
            --font-family: 'Inter', 'Segoe UI', 'Roboto', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
            --header-height: 68px;
        }

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

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

        body {
            font-family: var(--font-family);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        /* Container */
        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            z-index: 1000;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            transition: background var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            border-bottom-color: rgba(0, 240, 255, 0.18);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.1rem;
            letter-spacing: -0.02em;
            white-space: nowrap;
            color: var(--color-text);
            flex-shrink: 0;
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
            flex-shrink: 0;
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.25;
        }

        .logo-text strong {
            font-size: 1rem;
            font-weight: 700;
            background: linear-gradient(135deg, #fff 60%, var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .logo-text span {
            font-size: 0.65rem;
            font-weight: 500;
            color: var(--color-text-muted);
            letter-spacing: 0.05em;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }

        .nav-links a {
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

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

        .nav-links a.active {
            color: var(--color-accent);
            background: rgba(0, 240, 255, 0.1);
        }

        .nav-links a.active::after {
            content: '';
                           position: absolute;
                bottom: -2px;
                left: 50%;
                transform: translateX(-50%);
                width: 22px;
                height: 3px;
                border-radius: 3px;
                background: var(--color-accent);
                box-shadow: 0 0 10px rgba(0, 240, 255, 0.7);
            }

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

            .btn-auth {
                padding: 9px 18px;
                border-radius: 22px;
                font-size: 0.85rem;
                font-weight: 600;
                transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
                white-space: nowrap;
            }

            .btn-login {
                background: transparent;
                color: var(--color-text-secondary);
                border: 1px solid rgba(255, 255, 255, 0.16);
            }

            .btn-login:hover {
                background: rgba(255, 255, 255, 0.06);
                color: var(--color-text);
                border-color: rgba(255, 255, 255, 0.3);
            }

            .btn-signup {
                background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
                color: #fff;
                box-shadow: 0 4px 14px rgba(0, 82, 255, 0.4);
            }

            .btn-signup:hover {
                box-shadow: 0 6px 22px rgba(0, 82, 255, 0.65);
                color: #fff;
                transform: translateY(-1px);
            }

            .mobile-toggle {
                display: none;
                width: 42px;
                height: 42px;
                border-radius: 10px;
                background: rgba(255, 255, 255, 0.06);
                border: 1px solid rgba(255, 255, 255, 0.1);
                color: var(--color-text);
                font-size: 1.3rem;
                align-items: center;
                justify-content: center;
                transition: background var(--transition-fast);
            }

            .mobile-toggle:hover {
                background: rgba(255, 255, 255, 0.12);
            }

            /* Hero */
            .hero {
                position: relative;
                min-height: 100vh;
                display: flex;
                align-items: center;
                justify-content: center;
                background-image: linear-gradient(135deg, rgba(8, 9, 15, 0.88) 0%, rgba(13, 17, 30, 0.82) 50%, rgba(8, 9, 15, 0.94) 100%), url('/assets/images/backpic/back-1.jpg');
                background-size: cover;
                background-position: center;
                padding: calc(var(--header-height) + 56px) 0 72px;
                overflow: hidden;
            }

            .hero::before {
                content: '';
                position: absolute;
                inset: 0;
                background: radial-gradient(ellipse at 30% 20%, rgba(0, 82, 255, 0.18) 0%, transparent 55%),
                            radial-gradient(ellipse at 70% 80%, rgba(0, 240, 255, 0.15) 0%, transparent 55%);
                pointer-events: none;
            }

            .hero-content {
                position: relative;
                z-index: 1;
                max-width: 820px;
                text-align: center;
                margin: 0 auto;
            }

            .hero-badge-group {
                display: flex;
                flex-wrap: wrap;
                gap: 12px;
                justify-content: center;
                margin-bottom: 28px;
            }

            .hero-badge {
                display: inline-flex;
                align-items: center;
                gap: 8px;
                padding: 8px 18px;
                border-radius: 24px;
                background: rgba(0, 240, 255, 0.08);
                border: 1px solid rgba(0, 240, 255, 0.28);
                color: var(--color-accent);
                font-size: 0.85rem;
                font-weight: 600;
                backdrop-filter: blur(8px);
                -webkit-backdrop-filter: blur(8px);
            }

            .hero-badge i {
                font-size: 0.9rem;
            }

            .hero h1 {
                font-size: clamp(2rem, 5vw, 3.4rem);
                font-weight: 800;
                line-height: 1.18;
                letter-spacing: -0.03em;
                margin-bottom: 20px;
                background: linear-gradient(135deg, #FFFFFF 30%, var(--color-accent) 100%);
                -webkit-background-clip: text;
                -webkit-text-fill-color: transparent;
                background-clip: text;
            }

            .hero-subtitle {
                font-size: clamp(1rem, 2vw, 1.2rem);
                line-height: 1.7;
                color: var(--color-text-secondary);
                max-width: 720px;
                margin: 0 auto 32px;
            }

            .hero-actions {
                display: flex;
                flex-wrap: wrap;
                gap: 16px;
                justify-content: center;
                margin-bottom: 36px;
            }

            .btn-primary {
                display: inline-flex;
                align-items: center;
                gap: 10px;
                padding: 14px 30px;
                border-radius: 30px;
                font-size: 1rem;
                font-weight: 700;
                background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
                color: #fff;
                box-shadow: 0 8px 28px rgba(0, 82, 255, 0.5);
                transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            }

            .btn-primary:hover {
                transform: translateY(-2px);
                box-shadow: 0 12px 36px rgba(0, 82, 255, 0.7);
                color: #fff;
            }

            .btn-secondary {
                display: inline-flex;
                align-items: center;
                gap: 10px;
                padding: 14px 28px;
                border-radius: 30px;
                font-size: 1rem;
                font-weight: 600;
                background: rgba(255, 255, 255, 0.08);
                color: var(--color-text);
                border: 1px solid rgba(255, 255, 255, 0.18);
                backdrop-filter: blur(10px);
                transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
            }

            .btn-secondary:hover {
                background: rgba(255, 255, 255, 0.14);
                border-color: rgba(255, 255, 255, 0.35);
                transform: translateY(-2px);
                color: #fff;
            }

            .hero-stats {
                display: flex;
                flex-wrap: wrap;
                gap: 20px;
                justify-content: center;
                padding-top: 8px;
            }

            .hero-stat {
                display: flex;
                align-items: center;
                gap: 10px;
                padding: 10px 18px;
                border-radius: 14px;
                background: rgba(13, 17, 30, 0.5);
                border: 1px solid rgba(255, 255, 255, 0.08);
                backdrop-filter: blur(10px);
            }

            .hero-stat i {
                font-size: 1.4rem;
                color: var(--color-accent);
            }

            .hero-stat span {
                font-size: 0.9rem;
                color: var(--color-text-secondary);
                font-weight: 500;
            }

            .hero-stat strong {
                display: block;
                font-size: 1.1rem;
                color: #fff;
                font-weight: 700;
            }

            /* Sections */
            section {
                padding: 72px 0;
            }

            .section-header {
                max-width: 720px;
                margin-bottom: 48px;
            }

            .section-header.left {
                margin-left: 0;
                margin-right: auto;
                text-align: left;
            }

            .section-tag {
                display: inline-flex;
                align-items: center;
                gap: 8px;
                padding: 6px 16px;
                border-radius: 20px;
                font-size: 0.75rem;
                font-weight: 700;
                letter-spacing: 0.06em;
                text-transform: uppercase;
                color: var(--color-accent);
                background: rgba(0, 240, 255, 0.08);
                border: 1px solid rgba(0, 240, 255, 0.2);
                margin-bottom: 16px;
            }

            .section-header h2 {
                font-size: clamp(1.6rem, 3.5vw, 2.2rem);
                font-weight: 800;
                letter-spacing: -0.02em;
                line-height: 1.25;
                margin-bottom: 16px;
            }

            .section-header p {
                font-size: 1rem;
                line-height: 1.7;
                color: var(--color-text-secondary);
            }

            /* Content Calendar */
            .calendar-grid {
                display: grid;
                grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
                gap: 20px;
            }

            .calendar-card {
                background: var(--color-surface);
                border: 1px solid var(--color-border);
                border-radius: var(--radius-md);
                padding: 24px;
                transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
            }

            .calendar-card:hover {
                transform: translateY(-4px);
                border-color: rgba(0, 240, 255, 0.3);
                box-shadow: var(--shadow-glow);
            }

            .calendar-date {
                display: inline-flex;
                align-items: center;
                gap: 8px;
                font-size: 0.8rem;
                font-weight: 700;
                color: var(--color-accent);
                margin-bottom: 14px;
            }

            .calendar-card h3 {
                font-size: 1.05rem;
                font-weight: 700;
                margin-bottom: 10px;
                color: #fff;
            }

            .calendar-card p {
                font-size: 0.9rem;
                color: var(--color-text-secondary);
                line-height: 1.6;
            }

            /* Hot Topics */
            .topics-grid {
                display: grid;
                grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
                gap: 24px;
            }

            .topic-card {
                position: relative;
                border-radius: var(--radius-lg);
                overflow: hidden;
                background: var(--color-surface-solid);
                border: 1px solid var(--color-border);
                transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
                display: flex;
                flex-direction: column;
            }

            .topic-card:hover {
                transform: translateY(-6px);
                border-color: rgba(0, 240, 255, 0.25);
                box-shadow: var(--shadow-glow);
            }

            .topic-card-img {
                width: 100%;
                height: 180px;
                object-fit: cover;
                background: linear-gradient(135deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.1));
            }

            .topic-card-body {
                padding: 22px;
                flex: 1;
                display: flex;
                flex-direction: column;
            }

            .topic-card-tag {
                position: absolute;
                top: 16px;
                right: 16px;
                padding: 4px 12px;
                border-radius: 14px;
                font-size: 0.7rem;
                font-weight: 700;
                letter-spacing: 0.04em;
                background: rgba(0, 0, 0, 0.55);
                color: var(--color-accent);
                border: 1px solid rgba(0, 240, 255, 0.3);
                backdrop-filter: blur(6px);
            }

            .topic-card-body h3 {
                font-size: 1.1rem;
                font-weight: 700;
                margin-bottom: 10px;
                color: #fff;
            }

            .topic-card-body p {
                font-size: 0.9rem;
                color: var(--color-text-secondary);
                line-height: 1.6;
                margin-bottom: 18px;
                flex: 1;
            }

            .topic-link {
                display: inline-flex;
                align-items: center;
                gap: 6px;
                font-size: 0.9rem;
                font-weight: 600;
                color: var(--color-accent);
                transition: gap var(--transition-fast), color var(--transition-fast);
            }

            .topic-link:hover {
                color: var(--color-accent-hover);
                gap: 10px;
            }

            /* Data Dashboard */
            .dashboard-grid {
                display: grid;
                grid-template-columns: repeat(4, 1fr);
                gap: 20px;
            }

            .dash-card {
                background: var(--color-surface);
                border: 1px solid var(--color-border);
                border-radius: var(--radius-md);
                padding: 28px 22px;
                text-align: center;
                transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
            }

            .dash-card:hover {
                transform: translateY(-4px);
                border-color: rgba(0, 240, 255, 0.25);
                box-shadow: var(--shadow-glow);
            }

            .dash-card i {
                font-size: 2rem;
                color: var(--color-accent);
                margin-bottom: 16px;
            }

            .dash-card .dash-number {
                font-size: 2.2rem;
                font-weight: 800;
                color: #fff;
                line-height: 1.2;
                margin-bottom: 6px;
            }

            .dash-card p {
                font-size: 0.9rem;
                color: var(--color-text-secondary);
            }

            /* News / CMS List */
            .news-layout {
                display: grid;
                grid-template-columns: 1fr 320px;
                gap: 36px;
                align-items: start;
            }

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

            .news-item {
                display: flex;
                align-items: flex-start;
                gap: 18px;
                padding: 20px 22px;
                background: var(--color-surface);
                border: 1px solid var(--color-border);
                border-radius: var(--radius-md);
                transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
            }

            .news-item:hover {
                background: rgba(13, 17, 30, 0.85);
                border-color: rgba(0, 240, 255, 0.2);
                transform: translateX(4px);
            }

            .news-item-icon {
                width: 44px;
                height: 44px;
                border-radius: 10px;
                background: rgba(0, 240, 255, 0.08);
                display: flex;
                align-items: center;
                justify-content: center;
                color: var(--color-accent);
                font-size: 1.2rem;
                flex-shrink: 0;
            }

            .news-item-content {
                flex: 1;
                min-width: 0;
            }

            .news-item-content a {
                font-size: 1rem;
                font-weight: 700;
                color: #fff;
                line-height: 1.45;
                display: block;
                margin-bottom: 6px;
            }

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

            .news-item-meta {
                font-size: 0.8rem;
                color: var(--color-text-muted);
                display: flex;
                flex-wrap: wrap;
                gap: 12px;
            }

            .news-item-meta span {
                display: inline-flex;
                align-items: center;
                gap: 5px;
            }

            .news-sidebar {
                background: var(--color-surface);
                border: 1px solid var(--color-border);
                border-radius: var(--radius-lg);
                padding: 24px;
                position: sticky;
                top: calc(var(--header-height) + 24px);
            }

            .news-sidebar h3 {
                font-size: 1.1rem;
                font-weight: 700;
                margin-bottom: 16px;
                color: #fff;
            }

            .news-sidebar ul {
                display: flex;
                flex-direction: column;
                gap: 12px;
            }

            .news-sidebar li a {
                display: flex;
                align-items: center;
                gap: 10px;
                font-size: 0.9rem;
                color: var(--color-text-secondary);
                padding: 8px 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
                transition: color var(--transition-fast);
            }

            .news-sidebar li a:hover {
                color: var(--color-accent);
            }

            /* Usage Guide */
            .guide-grid {
                display: grid;
                grid-template-columns: repeat(3, 1fr);
                gap: 24px;
                counter-reset: guide-step;
            }

            .guide-step {
                background: var(--color-surface);
                border: 1px solid var(--color-border);
                border-radius: var(--radius-lg);
                padding: 30px 26px;
                position: relative;
                transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
            }

            .guide-step:hover {
                transform: translateY(-4px);
                border-color: rgba(0, 240, 255, 0.25);
                box-shadow: var(--shadow-glow);
            }

            .guide-step::after {
                counter-increment: guide-step;
                content: counter(guide-step, decimal-leading-zero);
                position: absolute;
                top: 20px;
                right: 24px;
                font-size: 2.5rem;
                font-weight: 800;
                opacity: 0.08;
                color: var(--color-accent);
            }

            .guide-step-icon {
                width: 56px;
                height: 56px;
                border-radius: 16px;
                background: linear-gradient(135deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.15));
                display: flex;
                align-items: center;
                justify-content: center;
                font-size: 1.5rem;
                color: var(--color-accent);
                margin-bottom: 18px;
            }

            .guide-step h3 {
                font-size: 1.05rem;
                font-weight: 700;
                margin-bottom: 10px;
                color: #fff;
            }

            .guide-step p {
                font-size: 0.9rem;
                color: var(--color-text-secondary);
                line-height: 1.6;
            }

            /* Footer */
            .site-footer {
                background: #06070D;
                border-top: 1px solid var(--color-border);
                padding: 60px 0 30px;
            }

            .footer-grid {
                display: grid;
                grid-template-columns: 1.5fr 1fr 1fr 1fr;
                gap: 40px;
                margin-bottom: 48px;
            }

            .footer-brand .logo {
                margin-bottom: 16px;
            }

            .footer-brand p {
                font-size: 0.9rem;
                color: var(--color-text-muted);
                line-height: 1.7;
                max-width: 300px;
            }

            .footer-col h4 {
                font-size: 1rem;
                font-weight: 700;
                color: #fff;
                margin-bottom: 18px;
            }

            .footer-col ul {
                display: flex;
                flex-direction: column;
                gap: 10px;
            }

            .footer-col ul a {
                font-size: 0.9rem;
                color: var(--color-text-muted);
                transition: color var(--transition-fast);
            }

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

            .footer-bottom {
                border-top: 1px solid rgba(255, 255, 255, 0.06);
                padding-top: 24px;
                display: flex;
                flex-wrap: wrap;
                align-items: center;
                justify-content: space-between;
                gap: 16px;
                font-size: 0.8rem;
                color: var(--color-text-muted);
            }

            .footer-bottom a {
                color: var(--color-text-secondary);
                margin-left: 16px;
            }

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

            /* FAB */
            .fab-left {
                position: fixed;
                left: 24px;
                bottom: 96px;
                z-index: 999;
                width: 52px;
                height: 52px;
                border-radius: 50%;
                background: rgba(8, 9, 15, 0.8);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                border: 2px solid var(--color-accent);
                display: flex;
                align-items: center;
                justify-content: center;
                color: var(--color-accent);
                font-size: 1.4rem;
                box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
                transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
                animation: fab-breathe 3s ease-in-out infinite;
            }

            .fab-left:hover {
                transform: scale(1.1);
                box-shadow: 0 0 28px rgba(0, 240, 255, 0.65);
                color: #fff;
                background: rgba(0, 82, 255, 0.85);
            }

            @keyframes fab-breathe {
                0%, 100% { opacity: 0.7; }
                50% { opacity: 1; }
            }

            /* Responsive */
            @media (max-width: 1024px) {
                .dashboard-grid {
                    grid-template-columns: repeat(2, 1fr);
                }

                .guide-grid {
                    grid-template-columns: repeat(2, 1fr);
                }

                .news-layout {
                    grid-template-columns: 1fr;
                }

                .news-sidebar {
                    position: static;
                }

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

            @media (max-width: 768px) {
                section {
                    padding: 48px 0;
                }

                .nav-links {
                    display: none;
                    position: absolute;
                    top: var(--header-height);
                    left: 0;
                    right: 0;
                    background: rgba(8, 9, 15, 0.98);
                    flex-direction: column;
                    align-items: flex-start;
                    padding: 20px 24px;
                    gap: 10px;
                    border-bottom: 1px solid rgba(0, 240, 255, 0.15);
                    backdrop-filter: blur(20px);
                }

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

                .nav-links a {
                    width: 100%;
                    padding: 12px 16px;
                    font-size: 1rem;
                }

                .nav-auth {
                    gap: 8px;
                }

                .btn-auth {
                    padding: 8px 14px;
                    font-size: 0.8rem;
                }

                .mobile-toggle {
                    display: flex;
                }

                .hero {
                    padding: calc(var(--header-height) + 40px) 0 48px;
                }

                .hero-stats {
                    gap: 12px;
                }

                .calendar-grid,
                .topics-grid,
                .guide-grid,
                .dashboard-grid {
                    grid-template-columns: 1fr;
                }

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

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

                .fab-left {
                    left: 16px;
                    bottom: 80px;
                    width: 48px;
                    height: 48px;
                    font-size: 1.2rem;
                }
            }

            @media (max-width: 520px) {
                .container {
                    padding: 0 18px;
                }

                .logo-text strong {
                    font-size: 0.9rem;
                }

                .hero-badge {
                    font-size: 0.75rem;
                    padding: 6px 12px;
                }

                .btn-primary,
                .btn-secondary {
                    width: 100%;
                    justify-content: center;
                }

                .hero-actions {
                    flex-direction: column;
                }

                .section-header {
                    margin-bottom: 32px;
                }

                .news-item {
                    flex-direction: column;
                    gap: 12px;
                }
            }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.72);
            --bg-card-strong: rgba(18, 24, 44, 0.92);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #7B8496;
            --border-glow: rgba(0, 240, 255, 0.3);
            --border-subtle: rgba(148, 163, 184, 0.15);
            --radius-xl: 24px;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-glow: 0 0 25px rgba(0, 240, 255, 0.18);
            --shadow-glow-strong: 0 0 35px rgba(0, 240, 255, 0.35);
            --shadow-card: 0 20px 35px rgba(2, 6, 23, 0.6);
            --font-sans: 'Be Vietnam Pro', 'Inter', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.55;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            background:
                radial-gradient(circle at 15% 20%, rgba(0, 82, 255, 0.12) 0%, transparent 28%),
                radial-gradient(circle at 85% 70%, rgba(0, 240, 255, 0.08) 0%, transparent 30%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
            pointer-events: none;
            z-index: 0;
        }

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

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

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

        button,
        input,
        textarea,
        select {
            font: inherit;
        }

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

        ul,
        ol {
            list-style: none;
        }

        :focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

        .container {
            width: min(var(--container), calc(100% - 48px));
            margin-inline: auto;
            position: relative;
            z-index: 1;
        }

        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.25);
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 18px;
        }

        /* === Header === */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.78);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            box-shadow: 0 8px 30px rgba(2, 6, 23, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            min-height: 74px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
            color: var(--text-primary);
        }

        .logo:hover {
            color: var(--text-primary);
            opacity: 0.92;
        }

        .logo-icon {
            width: 46px;
            height: 46px;
            display: grid;
            place-items: center;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(0, 82, 255, 0.15));
            border: 1px solid var(--border-glow);
            border-radius: 14px;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.2);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.25;
        }

        .logo-text strong {
            font-size: 1.06rem;
            font-weight: 800;
            letter-spacing: 0.01em;
            color: #fff;
        }

        .logo-text span {
            font-size: 0.7rem;
            font-weight: 500;
            color: var(--text-secondary);
            letter-spacing: 0.03em;
            margin-top: 3px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 0.94rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 9px 14px;
            border-radius: 999px;
            transition: background var(--transition), color var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }

        .nav-links a i {
            font-size: 0.85rem;
            opacity: 0.8;
        }

        .nav-links a:hover {
            color: #fff;
            background: rgba(0, 240, 255, 0.08);
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.12);
        }

        .nav-links a.active {
            color: #fff;
            background: rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.2);
            border: 1px solid rgba(0, 240, 255, 0.3);
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 700;
            border-radius: 999px;
            padding: 11px 24px;
            font-size: 0.92rem;
            letter-spacing: 0.01em;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
            border: 1px solid transparent;
            cursor: pointer;
            white-space: nowrap;
            line-height: 1.2;
        }

        .btn-ghost {
            background: transparent;
            color: var(--text-secondary);
            border-color: rgba(148, 163, 184, 0.25);
        }

        .btn-ghost:hover {
            color: #fff;
            border-color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.12);
            transform: translateY(-1px);
        }

        .btn-primary {
            background: linear-gradient(135deg, #0052FF 0%, #0077FF 55%, #00C6FF 130%);
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.4), 0 0 45px rgba(0, 240, 255, 0.2);
            border-color: rgba(0, 240, 255, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0, 82, 255, 0.55), 0 0 55px rgba(0, 240, 255, 0.35);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 14px rgba(0, 82, 255, 0.4);
        }

        .btn-outline {
            background: transparent;
            color: var(--accent-cyan);
            border-color: rgba(0, 240, 255, 0.4);
        }

        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.15);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-block {
            width: 100%;
        }

        .btn-apple {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: 0 0 15px rgba(255, 255, 255, 0.08);
        }

        .btn-apple:hover {
            background: rgba(255, 255, 255, 0.14);
            box-shadow: 0 0 22px rgba(255, 255, 255, 0.16);
            transform: translateY(-2px);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            padding: 8px;
            border-radius: 10px;
            border: 1px solid var(--border-subtle);
            background: rgba(255, 255, 255, 0.04);
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition);
        }

        .nav-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

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

        /* === Article Banner === */
        .article-banner {
            position: relative;
            padding: 48px 0 40px;
            overflow: hidden;
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
        }

        .article-banner-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.3;
            z-index: 0;
        }

        .article-banner::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8, 9, 15, 0.6) 0%, rgba(8, 9, 15, 0.85) 100%);
            z-index: 1;
            pointer-events: none;
        }

        .article-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.86rem;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .breadcrumb a {
            color: var(--accent-cyan);
            font-weight: 600;
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb span {
            opacity: 0.8;
        }

        .article-banner h1 {
            font-size: clamp(1.8rem, 4vw, 2.9rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            max-width: 800px;
            margin-bottom: 18px;
            color: #fff;
            text-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

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

        .article-meta i {
            color: var(--accent-cyan);
            font-size: 0.9rem;
        }

        /* === Article Layout === */
        .article-layout {
            padding: 48px 0 64px;
        }

        .article-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 36px;
            align-items: start;
        }

        .article-content {
            min-width: 0;
            background: var(--bg-card);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            padding: 32px;
            box-shadow: var(--shadow-card);
        }

        .article-cover {
            margin: -32px -32px 28px;
            border-radius: var(--radius-xl) var(--radius-xl) 0 0;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.03);
        }

        .article-cover img {
            width: 100%;
            aspect-ratio: 16/8;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .article-cover img:hover {
            transform: scale(1.01);
        }

        .article-body {
            font-size: 1.02rem;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        .article-body h2 {
            font-size: 1.55rem;
            font-weight: 800;
            color: #fff;
            margin: 32px 0 16px;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        .article-body h3 {
            font-size: 1.28rem;
            font-weight: 700;
            color: #fff;
            margin: 26px 0 12px;
            line-height: 1.4;
        }

        .article-body p {
            margin-bottom: 18px;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 22px 24px;
            padding-left: 0;
        }

        .article-body ul {
            list-style: none;
        }

        .article-body ul li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 10px;
        }

        .article-body ul li::before {
            content: "\f00c";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 1px;
            color: var(--accent-cyan);
            font-size: 0.85rem;
        }

        .article-body ol {
            list-style: decimal;
        }

        .article-body ol li {
            margin-bottom: 10px;
        }

        .article-body a {
            color: var(--accent-cyan);
            font-weight: 600;
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(0, 240, 255, 0.4);
        }

        .article-body a:hover {
            color: #fff;
            text-decoration-color: #fff;
        }

        .article-body img {
            border-radius: var(--radius-lg);
            margin: 24px 0;
        }

        .article-body blockquote {
            border-left: 3px solid var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
            padding: 18px 22px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 24px 0;
            font-style: italic;
            color: #fff;
        }

        .article-body code {
            background: rgba(0, 240, 255, 0.1);
            padding: 3px 8px;
            border-radius: 6px;
            font-size: 0.9em;
            color: #fff;
        }

        .empty-state {
            text-align: left;
            padding: 40px 0;
            max-width: 420px;
        }

        .empty-state i {
            font-size: 2.4rem;
            color: var(--accent-cyan);
            margin-bottom: 18px;
        }

        .empty-state h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

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

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 100px;
        }

        .sidebar-card {
            padding: 24px;
            background: var(--bg-card);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
        }

        .sidebar-card h2 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }

        .sidebar-card p {
            font-size: 0.94rem;
            color: var(--text-secondary);
            margin-bottom: 18px;
            line-height: 1.6;
        }

        .sidebar-card img {
            border-radius: var(--radius-md);
            margin-bottom: 18px;
            aspect-ratio: 4/3;
            object-fit: cover;
        }

        .sidebar-links li {
            margin-bottom: 10px;
        }

        .sidebar-links a {
            display: block;
            padding: 10px 14px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.94rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }

        .sidebar-links a:hover {
            color: #fff;
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.1);
        }

        /* === CTA Section === */
        .cta-section {
            padding: 24px 0 64px;
        }

        .cta-panel {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 32px;
            align-items: center;
            padding: 40px;
            background: var(--bg-card-strong);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border: 1px solid rgba(0, 240, 255, 0.25);
            box-shadow: var(--shadow-glow-strong);
            border-radius: var(--radius-xl);
            overflow: hidden;
        }

        .cta-content .section-tag {
            margin-bottom: 14px;
        }

        .cta-content h2 {
            font-size: clamp(1.5rem, 3vw, 2.1rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 14px;
            color: #fff;
        }

        .cta-content p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.65;
            margin-bottom: 26px;
            max-width: 520px;
        }

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

        .cta-image img {
            border-radius: var(--radius-lg);
            aspect-ratio: 1/1;
            object-fit: cover;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.2);
            border: 1px solid rgba(0, 240, 255, 0.25);
        }

        /* === FAQ === */
        .faq-section {
            padding: 32px 0 72px;
        }

        .section-heading {
            margin-bottom: 28px;
        }

        .section-heading h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 820px;
            margin: 0;
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 0 22px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.08);
        }

        .faq-item summary {
            cursor: pointer;
            list-style: none;
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

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

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--accent-cyan);
            font-size: 0.9rem;
            transition: transform 0.3s ease;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item p {
            color: var(--text-secondary);
            font-size: 0.96rem;
            line-height: 1.7;
            padding: 0 0 20px;
            border-top: 1px solid var(--border-subtle);
            padding-top: 16px;
        }

        /* === Footer === */
        .site-footer {
            background: rgba(8, 9, 15, 0.9);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 56px 0 28px;
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }

        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-top: 16px;
            max-width: 380px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.03em;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid rgba(148, 163, 184, 0.15);
            font-size: 0.86rem;
            color: var(--text-muted);
        }

        .footer-bottom .badges {
            display: flex;
            gap: 14px;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        .footer-bottom .badges i {
            color: var(--accent-cyan);
            margin-right: 5px;
        }

        /* === FAB === */
        .fab-support {
            position: fixed;
            left: 20px;
            bottom: 96px;
            z-index: 50;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(8, 9, 15, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 2px solid transparent;
            border-radius: 999px;
            padding: 14px 20px;
            cursor: pointer;
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35), 0 0 0 1px rgba(0, 240, 255, 0.2);
            transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
            opacity: 0.7;
            overflow: hidden;
            text-decoration: none;
        }

        .fab-support::before {
            content: "";
            position: absolute;
            inset: -2px;
            border-radius: inherit;
            padding: 2px;
            background: linear-gradient(135deg, #00F0FF, #0052FF, #FF007F);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }

        .fab-support:hover {
            opacity: 1;
            transform: translateY(-3px) scale(1.04);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.55), 0 0 60px rgba(0, 82, 255, 0.35);
            color: #fff;
        }

        .fab-support:active {
            transform: translateY(0) scale(0.97);
        }

        .fab-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.2);
            color: var(--accent-cyan);
            font-size: 1rem;
            animation: pulse-glow 2.5s infinite;
        }

        .fab-text {
            position: relative;
            z-index: 2;
        }

        .fab-dot {
            position: absolute;
            top: 6px;
            right: 6px;
            width: 10px;
            height: 10px;
            background: #FF007F;
            border-radius: 50%;
            box-shadow: 0 0 10px #FF007F;
            animation: blink-dot 1.5s infinite;
        }

        @keyframes pulse-glow {
            0%, 100% { box-shadow: 0 0 0 0 rgba(0, 240, 255, 0.4); }
            50% { box-shadow: 0 0 0 8px rgba(0, 240, 255, 0); }
        }

        @keyframes blink-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(0.8); }
        }

        /* === Responsive === */
        @media (max-width: 1024px) {
            .header-inner {
                gap: 16px;
            }

            .nav-links {
                gap: 2px;
            }

            .nav-links a {
                padding: 8px 10px;
                font-size: 0.86rem;
            }

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

            .article-sidebar {
                position: static;
                flex-direction: column;
            }

            .cta-panel {
                grid-template-columns: 1fr;
                padding: 28px;
                gap: 24px;
            }

            .cta-image img {
                aspect-ratio: 16/9;
                width: 100%;
            }

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

        @media (max-width: 768px) {
            .container {
                width: calc(100% - 32px);
            }

            .header-inner {
                flex-wrap: wrap;
                min-height: auto;
                padding: 12px 0;
            }

            .nav-toggle {
                display: flex;
                order: 1;
                margin-left: auto;
            }

            .header-actions {
                order: 2;
                gap: 8px;
            }

            .header-actions .btn {
                padding: 9px 16px;
                font-size: 0.83rem;
            }

            .nav-links {
                order: 3;
                display: none;
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                margin: 10px 0 0;
                padding: 10px 0;
                background: rgba(13, 17, 30, 0.96);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                border: 1px solid rgba(0, 240, 255, 0.2);
                border-radius: 20px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }

            .nav-links.is-open {
                display: flex;
            }

            .nav-links a {
                padding: 14px 18px;
                font-size: 1rem;
                border-radius: 0;
            }

            .article-content {
                padding: 20px;
            }

            .article-cover {
                margin: -20px -20px 20px;
            }

            .article-banner h1 {
                font-size: 1.6rem;
            }

            .section-heading h2 {
                font-size: 1.5rem;
            }

            .cta-panel {
                padding: 22px;
            }

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

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }

            .fab-support {
                bottom: 16px;
                left: 16px;
                padding: 12px 16px;
                font-size: 0.82rem;
            }

            .fab-text {
                display: none;
            }

            .fab-support .fab-icon {
                width: 28px;
                height: 28px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .logo-text strong {
                font-size: 0.92rem;
            }

            .logo-text span {
                font-size: 0.62rem;
            }

            .logo-icon {
                width: 40px;
                height: 40px;
                font-size: 1.2rem;
                border-radius: 12px;
            }

            .header-actions .btn {
                padding: 8px 12px;
                font-size: 0.78rem;
            }

            .btn {
                padding: 10px 18px;
                font-size: 0.86rem;
            }

            .breadcrumb {
                font-size: 0.78rem;
            }

            .article-meta {
                gap: 12px;
                font-size: 0.8rem;
            }

            .article-body {
                font-size: 0.96rem;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: stretch;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --surface-glass: rgba(13, 17, 30, 0.72);
            --surface-solid: #111726;
            --accent-blue: #0052FF;
            --neon-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.35);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8B94A7;
            --border-glass: rgba(0, 240, 255, 0.16);
            --border-subtle: rgba(255, 255, 255, 0.07);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 28px;
            --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 32px rgba(0, 240, 255, 0.18);
            --shadow-glow-strong: 0 0 48px rgba(0, 82, 255, 0.35);
            --font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
            --nav-height: 78px;
        }

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

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

        body {
            font-family: var(--font-family);
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.65;
            margin: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            position: relative;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 20% 10%, rgba(0, 82, 255, 0.09) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 90%, rgba(0, 240, 255, 0.06) 0%, transparent 55%),
                repeating-linear-gradient(0deg, transparent 0px, transparent 39px, rgba(0, 240, 255, 0.015) 40px),
                repeating-linear-gradient(90deg, transparent 0px, transparent 39px, rgba(0, 240, 255, 0.015) 40px);
            pointer-events: none;
            z-index: 0;
        }

        body>* {
            position: relative;
            z-index: 1;
        }

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

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

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

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1240px;
            }
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid var(--border-glass);
            transition: background var(--transition-base), box-shadow var(--transition-base);
            height: var(--nav-height);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            box-shadow: 0 8px 36px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
            text-decoration: none;
            color: var(--text-primary);
            min-width: 0;
        }

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

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.9), rgba(0, 240, 255, 0.55));
            border-radius: 12px;
            font-size: 20px;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            min-width: 0;
        }

        .logo-text strong {
            font-size: 16px;
            font-weight: 800;
            letter-spacing: -0.02em;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .logo-text span {
            font-size: 11px;
            color: var(--text-secondary);
            font-weight: 500;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 16px;
            border-radius: 50px;
            font-size: 13.5px;
            font-weight: 600;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .nav-links a i {
            font-size: 13px;
            opacity: 0.8;
        }

        .nav-links a:hover {
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.06);
            border-color: rgba(0, 240, 255, 0.18);
        }

        .nav-links a.active {
            color: #fff;
            background: rgba(0, 82, 255, 0.22);
            border-color: rgba(0, 240, 255, 0.35);
            box-shadow: inset 0 0 18px rgba(0, 240, 255, 0.08);
        }

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

        .btn-outline-nav {
            display: inline-flex;
            align-items: center;
            padding: 9px 18px;
            border-radius: 50px;
            font-size: 13.5px;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-outline-nav:hover {
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.05);
        }

        .btn-solid-nav {
            display: inline-flex;
            align-items: center;
            padding: 9px 22px;
            border-radius: 50px;
            font-size: 13.5px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), #0070E0);
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
        }

        .btn-solid-nav:hover {
            background: linear-gradient(135deg, #0066FF, #0088FF);
            box-shadow: 0 6px 26px rgba(0, 82, 255, 0.5);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
            width: 44px;
            height: 44px;
            border-radius: 10px;
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
        }

        @media (max-width: 991px) {
            .nav-links {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px 20px;
                gap: 4px;
                border-bottom: 1px solid var(--border-glass);
                box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
            }

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

            .nav-links a {
                padding: 14px 16px;
                border-radius: 12px;
                font-size: 14px;
                justify-content: flex-start;
                width: 100%;
            }

            .nav-actions .btn-outline-nav,
            .nav-actions .btn-solid-nav {
                padding: 9px 16px;
                font-size: 12.5px;
            }

            .nav-toggle {
                display: flex;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                gap: 12px;
            }

            .logo-text strong {
                font-size: 13px;
            }

            .logo-text span {
                font-size: 10px;
            }

            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
                border-radius: 10px;
            }

            .nav-actions .btn-outline-nav {
                display: none;
            }

            .nav-actions .btn-solid-nav {
                padding: 9px 16px;
                font-size: 12px;
            }
        }

        /* ========== BUTTONS ========== */
        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue) 0%, #0070E0 50%, #00A8E8 100%);
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 6px 28px rgba(0, 82, 255, 0.4), 0 0 40px rgba(0, 240, 255, 0.12);
            text-decoration: none;
            white-space: nowrap;
            position: relative;
            overflow: hidden;
        }

        .btn-primary-glow::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 200%;
            height: 100%;
            background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.18) 50%, transparent 100%);
            transition: left 0.6s ease;
        }

        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 82, 255, 0.55), 0 0 60px rgba(0, 240, 255, 0.22);
            color: #fff;
            background: linear-gradient(135deg, #0066FF 0%, #0088E8 50%, #00B8F0 100%);
        }

        .btn-primary-glow:hover::after {
            left: 100%;
        }

        .btn-primary-glow:active {
            transform: translateY(-1px) scale(0.98);
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.35);
        }

        .btn-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 13px 28px;
            border-radius: 50px;
            font-size: 14.5px;
            font-weight: 600;
            color: var(--text-primary);
            background: var(--surface-glass);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-glass:hover {
            border-color: rgba(0, 240, 255, 0.45);
            background: rgba(0, 240, 255, 0.08);
            color: var(--neon-cyan);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.15);
            transform: translateY(-2px);
        }

        /* ========== HERO ========== */
        .hero-section {
            padding: calc(var(--nav-height) + 60px) 0 60px;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: -200px;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.14) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 16px;
            align-items: center;
            position: relative;
        }

        .hero-content {
            padding-right: 10px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 12.5px;
            font-weight: 600;
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.07);
            border: 1px solid rgba(0, 240, 255, 0.25);
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .hero-badge i {
            font-size: 12px;
        }

        .hero-content h1 {
            font-size: clamp(28px, 4.2vw, 46px);
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.025em;
            color: var(--text-primary);
            margin: 0 0 18px;
        }

        .hero-content h1 .highlight {
            background: linear-gradient(135deg, var(--neon-cyan) 0%, #00A8E8 50%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin: 0 0 28px;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .hero-kpi-row {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
        }

        .hero-kpi {
            display: flex;
            flex-direction: column;
        }

        .hero-kpi strong {
            font-size: 26px;
            font-weight: 800;
            color: var(--neon-cyan);
            letter-spacing: -0.02em;
        }

        .hero-kpi span {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 500;
            margin-top: 2px;
        }

        .hero-visual {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-visual .clip-shape {
            position: absolute;
            inset: 0;
            background: linear-gradient(145deg, rgba(0, 82, 255, 0.16) 0%, rgba(0, 240, 255, 0.05) 100%);
            clip-path: polygon(12% 0%, 100% 0%, 88% 100%, 0% 100%);
            border-radius: 0;
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.2);
            box-shadow: var(--shadow-glow);
        }

        .hero-visual .clip-shape img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.9;
            transition: transform var(--transition-slow);
        }

        .hero-visual:hover .clip-shape img {
            transform: scale(1.04);
        }

        .hero-visual .floating-chip {
            position: absolute;
            background: var(--surface-glass);
            backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            display: flex;
            align-items: center;
            gap: 12px;
            box-shadow: var(--shadow-soft), var(--shadow-glow);
            z-index: 3;
        }

        .floating-chip.top-right {
            top: 24px;
            right: -10px;
        }

        .floating-chip.bottom-left {
            bottom: 30px;
            left: -12px;
        }

        .floating-chip .chip-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            font-size: 16px;
            flex-shrink: 0;
        }

        .floating-chip .chip-icon.blue {
            background: rgba(0, 82, 255, 0.2);
            color: #4D9FFF;
        }

        .floating-chip .chip-icon.cyan {
            background: rgba(0, 240, 255, 0.14);
            color: var(--neon-cyan);
        }

        .floating-chip .chip-text strong {
            display: block;
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .floating-chip .chip-text span {
            font-size: 11.5px;
            color: var(--text-muted);
        }

        @media (max-width: 991px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero-content {
                padding-right: 0;
                text-align: left;
            }

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

            .hero-visual {
                min-height: 300px;
            }

            .floating-chip.top-right {
                right: 10px;
                top: 12px;
            }

            .floating-chip.bottom-left {
                left: 10px;
                bottom: 14px;
            }
        }

        @media (max-width: 520px) {
            .hero-section {
                padding: calc(var(--nav-height) + 40px) 0 40px;
            }

            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }

            .btn-primary-glow,
            .btn-glass {
                width: 100%;
                padding: 13px 20px;
                font-size: 14px;
            }

            .hero-kpi-row {
                gap: 20px;
            }

            .hero-kpi strong {
                font-size: 22px;
            }

            .hero-visual {
                min-height: 240px;
            }

            .floating-chip {
                padding: 10px 14px;
            }

            .floating-chip .chip-icon {
                width: 30px;
                height: 30px;
                font-size: 13px;
            }

            .floating-chip .chip-text strong {
                font-size: 12px;
            }
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 64px 0;
            position: relative;
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--neon-cyan);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 10px;
        }

        .section-header h2 {
            font-size: clamp(24px, 3vw, 36px);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin: 0 0 12px;
            line-height: 1.25;
        }

        .section-header p {
            font-size: 15.5px;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0;
            line-height: 1.7;
        }

        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--neon-cyan));
            border-radius: 3px;
            margin-top: 16px;
        }

        /* ========== METRICS BOARD ========== */
        .metrics-board {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .metric-item {
            background: var(--surface-glass);
            backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .metric-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--neon-cyan));
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .metric-item:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        .metric-item:hover::before {
            opacity: 1;
        }

        .metric-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            border-radius: 12px;
            font-size: 18px;
            margin-bottom: 16px;
            background: rgba(0, 82, 255, 0.16);
            color: #4D9FFF;
        }

        .metric-item strong {
            display: block;
            font-size: 28px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }

        .metric-item span {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        @media (max-width: 991px) {
            .metrics-board {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
        }

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

            .metric-item {
                padding: 18px 16px;
                display: flex;
                align-items: center;
                gap: 14px;
            }

            .metric-icon {
                margin-bottom: 0;
                width: 40px;
                height: 40px;
                font-size: 15px;
            }

            .metric-item strong {
                font-size: 22px;
            }
        }

        /* ========== STEPS / SERVICE MATRIX ========== */
        .steps-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: start;
        }

        .steps-layout .steps-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-glow);
            position: relative;
            min-height: 300px;
        }

        .steps-layout .steps-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 300px;
        }

        .steps-layout .steps-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 30%, rgba(8, 9, 15, 0.75) 100%);
            pointer-events: none;
        }

        .step-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .step-item {
            display: flex;
            gap: 18px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-subtle);
            transition: all var(--transition-base);
        }

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

        .step-item:hover {
            padding-left: 8px;
        }

        .step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            font-size: 16px;
            font-weight: 800;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.24), rgba(0, 240, 255, 0.08));
            color: var(--neon-cyan);
            border: 1px solid rgba(0, 240, 255, 0.3);
            flex-shrink: 0;
            margin-top: 2px;
        }

        .step-body h3 {
            font-size: 16.5px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 6px;
            letter-spacing: -0.01em;
        }

        .step-body p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }

        @media (max-width: 991px) {
            .steps-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .steps-layout .steps-visual {
                min-height: 220px;
            }

            .steps-layout .steps-visual img {
                min-height: 220px;
            }
        }

        @media (max-width: 520px) {
            .step-item {
                gap: 14px;
                padding: 16px 0;
            }

            .step-number {
                width: 36px;
                height: 36px;
                font-size: 13px;
            }

            .step-body h3 {
                font-size: 15px;
            }
        }

        /* ========== COMPARISON ========== */
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .compare-card {
            background: var(--surface-glass);
            backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .compare-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--neon-cyan));
        }

        .compare-card.highlight {
            border-color: rgba(0, 240, 255, 0.42);
            box-shadow: var(--shadow-glow-strong);
        }

        .compare-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: var(--shadow-glow);
        }

        .compare-badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 16px;
        }

        .compare-badge.android {
            background: rgba(0, 240, 255, 0.12);
            color: var(--neon-cyan);
        }

        .compare-badge.ios {
            background: rgba(0, 82, 255, 0.18);
            color: #4D9FFF;
        }

        .compare-card h3 {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            margin: 0 0 10px;
        }

        .compare-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0 0 18px;
            line-height: 1.65;
        }

        .compare-specs {
            list-style: none;
            padding: 0;
            margin: 0 0 22px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .compare-specs li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13.5px;
            color: var(--text-secondary);
        }

        .compare-specs li i {
            color: var(--neon-cyan);
            font-size: 13px;
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }

        .compare-card .btn-download {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            width: 100%;
            padding: 13px 20px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), #0070E0);
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.3);
        }

        .compare-card .btn-download:hover {
            background: linear-gradient(135deg, #0066FF, #0088FF);
            box-shadow: 0 8px 30px rgba(0, 82, 255, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }

        @media (max-width: 767px) {
            .comparison-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .compare-card {
                padding: 24px 20px;
            }
        }

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

        .faq-item {
            background: var(--surface-glass);
            backdrop-filter: blur(14px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
        }

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

        .faq-question h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
            letter-spacing: -0.01em;
        }

        .faq-question .faq-toggle-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.08);
            color: var(--neon-cyan);
            font-size: 13px;
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }

        .faq-item.open .faq-toggle-icon {
            transform: rotate(180deg);
        }

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

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        .faq-answer-inner a {
            color: var(--neon-cyan);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        @media (max-width: 520px) {
            .faq-question {
                padding: 15px 16px;
                gap: 10px;
            }

            .faq-question h3 {
                font-size: 13.5px;
            }

            .faq-answer-inner {
                padding: 0 16px 16px;
                font-size: 13px;
            }
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 56px 0 48px;
        }

        .cta-panel {
            background: linear-gradient(145deg, rgba(0, 82, 255, 0.13) 0%, rgba(0, 240, 255, 0.05) 100%);
            border: 1px solid rgba(0, 240, 255, 0.22);
            border-radius: var(--radius-xl);
            padding: 44px 40px;
            text-align: left;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-glow);
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.12) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-panel h2 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin: 0 0 12px;
            line-height: 1.25;
        }

        .cta-panel p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 0 24px;
            line-height: 1.7;
        }

        .cta-panel .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        @media (max-width: 520px) {
            .cta-panel {
                padding: 28px 20px;
                text-align: left;
            }

            .cta-panel .cta-actions {
                flex-direction: column;
            }

            .cta-panel .btn-primary-glow,
            .cta-panel .btn-glass {
                width: 100%;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: rgba(8, 9, 15, 0.95);
            border-top: 1px solid var(--border-glass);
            padding: 52px 0 28px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .logo {
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .footer-brand .logo .logo-text strong {
            font-size: 16px;
        }

        .footer-brand .logo .logo-text span {
            font-size: 11px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 380px;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 16px;
            letter-spacing: -0.01em;
        }

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

        .footer-col ul li a {
            font-size: 13.5px;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--neon-cyan);
            padding-left: 4px;
        }

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

        .footer-bottom span {
            font-size: 12.5px;
            color: var(--text-muted);
        }

        .footer-bottom .footer-badges {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 11.5px;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-subtle);
        }

        .footer-badge i {
            color: var(--neon-cyan);
            font-size: 11px;
        }

        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-brand {
                grid-column: auto;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
        }

        /* ========== FAB ========== */
        .fab-neon {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1060;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 2px solid rgba(0, 240, 255, 0.5);
            color: var(--neon-cyan);
            font-size: 19px;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35), 0 4px 20px rgba(0, 0, 0, 0.4);
            text-decoration: none;
            opacity: 0.65;
            animation: fab-breathe 3.2s ease-in-out infinite;
        }

        .fab-neon:hover {
            opacity: 1;
            box-shadow: 0 0 36px rgba(0, 240, 255, 0.6), 0 6px 24px rgba(0, 0, 0, 0.5);
            transform: scale(1.12);
            color: #fff;
        }

        .fab-neon:active {
            transform: scale(0.94);
            opacity: 1;
        }

        .fab-neon .fab-dot {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #FF3B5C;
            border: 2px solid #08090F;
            animation: fab-dot-blink 1.8s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%,
            100% {
                opacity: 0.6;
            }
            50% {
                opacity: 0.85;
            }
        }

        @keyframes fab-dot-blink {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(0.75);
            }
        }

        @media (max-width: 520px) {
            .fab-neon {
                width: 48px;
                height: 48px;
                font-size: 17px;
                left: 12px;
                bottom: 80px;
            }
        }

        /* ========== UTILITIES ========== */
        .text-gradient {
            background: linear-gradient(135deg, var(--neon-cyan) 0%, #00A8E8 50%, var(--accent-blue) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            margin: -1px;
            padding: 0;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category2 */
:root {
            --bg: #08090F;
            --bg-2: #0D111E;
            --surface: rgba(13, 17, 30, 0.72);
            --surface-strong: rgba(18, 24, 40, 0.9);
            --border: rgba(0, 240, 255, 0.18);
            --border-hover: rgba(0, 240, 255, 0.45);
            --accent: #0052FF;
            --accent-2: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.35);
            --text: #FFFFFF;
            --muted: #CBD5E1;
            --text-dim: #94A3B8;
            --danger: #FF3366;
            --safe: #22C55E;
            --radius: 18px;
            --radius-sm: 12px;
            --radius-lg: 28px;
            --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
            --shadow-neon: 0 0 18px rgba(0, 240, 255, 0.25);
            --transition: all .25s cubic-bezier(.4,0,.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --maxw: 1200px;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font);
            background: linear-gradient(160deg, #08090F 0%, #0D111E 45%, #0B1226 100%);
            color: var(--text);
            line-height: 1.6;
            min-height: 100vh;
        }

        body::before {
            content: "";
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background-image: 
                radial-gradient(circle at 15% 20%, rgba(0, 82, 255, 0.12), transparent 40%),
                radial-gradient(circle at 85% 70%, rgba(0, 240, 255, 0.08), transparent 45%);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            width: 100%;
            max-width: var(--maxw);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; display: block; }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 8px 28px rgba(0,0,0,0.3);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            min-width: 0;
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--accent), var(--accent-2));
            border-radius: 12px;
            font-size: 20px;
            color: #fff;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
            flex-shrink: 0;
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            min-width: 0;
        }

        .logo-text strong {
            font-size: 1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .logo-text span {
            font-size: 0.72rem;
            color: var(--muted);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--muted);
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: #fff;
            background: rgba(255,255,255,0.04);
            border-color: var(--border);
        }

        .nav-links a.active {
            color: #fff;
            background: linear-gradient(135deg, var(--accent), var(--accent-2));
            border-color: transparent;
            box-shadow: 0 0 16px rgba(0,240,255,0.35);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            border: none;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.05);
            border-color: var(--border-hover);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-2));
            color: #fff;
            box-shadow: 0 4px 20px rgba(0, 240, 255, 0.4);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 240, 255, 0.6);
        }

        .btn-lg {
            padding: 15px 32px;
            font-size: 1rem;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Hero */
        .hero {
            padding: 70px 0 60px;
            position: relative;
            overflow: hidden;
        }

        .hero::after {
            content: "";
            position: absolute;
            top: -20%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15), transparent 70%);
            border-radius: 50%;
            z-index: 0;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff, #A5F3FC);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: 1.1rem;
            color: var(--muted);
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }

        .hero-badges {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 30px;
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border);
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--muted);
        }

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

        .hero-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 30px;
            width: 100%;
            max-width: 420px;
            box-shadow: var(--shadow), var(--shadow-neon);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .promo-highlight {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .promo-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }

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

        .promo-icon {
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: rgba(0, 240, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-2);
            flex-shrink: 0;
        }

        .promo-info strong {
            font-size: 1rem;
            display: block;
            margin-bottom: 2px;
        }
        .promo-info span {
            font-size: 0.8rem;
            color: var(--text-dim);
        }

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

        .section-header {
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }
        .section-header p {
            color: var(--muted);
            max-width: 700px;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            text-align: center;
            backdrop-filter: blur(12px);
            transition: var(--transition);
        }
        .metric-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-neon);
        }
        .metric-value {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-2);
            letter-spacing: -0.02em;
            margin-bottom: 6px;
        }
        .metric-label {
            font-size: 0.85rem;
            color: var(--muted);
        }

        .promo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .promo-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 26px;
            position: relative;
            overflow: hidden;
            transition: var(--transition);
        }
        .promo-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow), var(--shadow-neon);
        }
        .promo-card .tag {
            position: absolute;
            top: 16px;
            right: 16px;
            background: linear-gradient(135deg, var(--accent), var(--accent-2));
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 20px;
        }
        .promo-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            padding-right: 60px;
        }
        .promo-card p {
            color: var(--muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }
        .promo-card .btn-link {
            color: var(--accent-2);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px;
            position: relative;
            counter-increment: step;
        }
        .step-card::before {
            content: counter(step);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-2));
            color: #fff;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            font-size: 1.1rem;
        }
        .step-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--muted);
        }

        .compare-table-wrap {
            overflow-x: auto;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            backdrop-filter: blur(12px);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }
        .compare-table th {
            text-align: left;
            padding: 16px 20px;
            background: rgba(0,0,0,0.25);
            border-bottom: 1px solid var(--border);
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: var(--muted);
        }
        .compare-table td {
            padding: 16px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            font-size: 0.9rem;
        }
        .compare-table tr:last-child td { border-bottom: none; }
        .compare-table .highlight {
            color: var(--accent-2);
            font-weight: 700;
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 12px;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item summary {
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            transition: transform 0.2s;
            color: var(--accent-2);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-content {
            padding: 0 22px 20px;
            color: var(--muted);
            font-size: 0.9rem;
        }

        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.18), rgba(0, 240, 255, 0.08));
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 50px;
            text-align: center;
            box-shadow: var(--shadow);
        }
        .cta-section h2 {
            font-size: 2rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--muted);
            margin-bottom: 28px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Footer */
        .site-footer {
            background: rgba(8, 9, 15, 0.9);
            border-top: 1px solid var(--border);
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            color: var(--muted);
            font-size: 0.9rem;
            margin-top: 16px;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--accent-2);
            margin-bottom: 18px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col a {
            color: var(--muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-dim);
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 999;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(8px);
            border: 1px solid var(--border-hover);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-2);
            font-size: 20px;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
            transition: var(--transition);
            cursor: pointer;
        }
        .fab:hover {
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.8);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; }
            .hero-visual { order: -1; }
            .metrics-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-wrapper { flex-wrap: wrap; padding: 10px 0; }
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                flex-direction: column;
                align-items: stretch;
                padding: 20px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                z-index: 999;
            }
            .nav-links.open { transform: translateY(0); }
            .nav-links a { justify-content: center; }
            .mobile-toggle { display: block; }
            .nav-actions .btn { padding: 8px 16px; font-size: 0.8rem; }
            .hero { padding: 40px 0; }
            .hero-content h1 { font-size: 2rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; }
            .metrics-grid { grid-template-columns: 1fr 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 30px; }
            .cta-section { padding: 30px 20px; }
            .compare-table-wrap { border-radius: var(--radius-sm); }
        }

        @media (max-width: 480px) {
            .container { padding: 0 16px; }
            .logo-text strong { font-size: 0.85rem; }
            .logo-text span { font-size: 0.65rem; }
            .metrics-grid { grid-template-columns: 1fr; }
            .promo-grid { grid-template-columns: 1fr; }
            .section-header h2 { font-size: 1.6rem; }
        }