:root {
            --bg-primary: #f8fafc;
            --bg-secondary: #ffffff;
            --bg-tertiary: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #64748b;
            --accent-cyan: #06b6d4;
            --accent-green: #10b981;
            --accent-purple: #8b5cf6;
            --border-color: #e2e8f0;
            --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.15);
            --glow-purple: 0 0 20px rgba(139, 92, 246, 0.15);
            --neon-gradient: linear-gradient(135deg, #06b6d4, #8b5cf6, #10b981);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-primary);
            background-color: var(--bg-primary);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: all 0.3s ease;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

        .nav-links {
            display: flex;
            gap: 20px;
            list-style: none;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
        }

        .btn-neon {
            background: var(--neon-gradient);
            color: #ffffff;
            box-shadow: var(--glow-cyan);
        }

        .btn-neon:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(6, 182, 212, 0.4);
        }

        .btn-outline {
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            background: transparent;
        }

        .btn-outline:hover {
            background: rgba(6, 182, 212, 0.05);
            transform: translateY(-2px);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-primary);
        }

        /* Hero Section (No Images!) */
        .hero {
            position: relative;
            padding: 140px 0 80px;
            background: radial-gradient(circle at 10% 20%, rgba(6, 182, 212, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 40%),
                        var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--neon-gradient);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(6, 182, 212, 0.08);
            border: 1px solid rgba(6, 182, 212, 0.3);
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 1px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.03); }
            100% { transform: scale(1); }
        }

        .hero h1 {
            font-size: 2.8rem;
            line-height: 1.25;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero h1 span {
            background: var(--neon-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
        }

        .hero-desc {
            max-width: 700px;
            margin: 0 auto 35px;
            font-size: 1.15rem;
            color: var(--text-secondary);
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
            margin-bottom: 50px;
        }

        .hero-btns .btn {
            padding: 12px 30px;
            font-size: 16px;
        }

        .hero-features {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 20px;
        }

        .hero-feature-item {
            background: var(--bg-primary);
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .hero-feature-item:hover {
            transform: translateY(-5px);
            border-color: var(--accent-purple);
            box-shadow: var(--glow-purple);
        }

        .hero-feature-item h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .hero-feature-item p {
            font-size: 12px;
            color: var(--text-secondary);
        }

        /* Section Layouts */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-light {
            background-color: var(--bg-secondary);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px;
        }

        .section-title-badge {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--accent-purple);
            font-weight: 700;
            margin-bottom: 10px;
            display: block;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 15px;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 16px;
        }

        /* About Us Section */
        .about-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 24px;
            margin-bottom: 15px;
            color: var(--text-primary);
        }

        .about-content p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-size: 15px;
        }

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

        .stat-card {
            background: var(--bg-tertiary);
            padding: 20px;
            border-radius: 12px;
            text-align: center;
            border: 1px solid var(--border-color);
        }

        .stat-card .num {
            font-size: 32px;
            font-weight: 800;
            background: var(--neon-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: block;
        }

        .stat-card .label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 5px;
        }

        /* Services Grid */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: var(--bg-secondary);
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--accent-cyan);
            opacity: 0;
            transition: opacity 0.3s;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--glow-cyan);
            border-color: rgba(6, 182, 212, 0.4);
        }

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

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .service-card p {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 15px;
        }

        .service-card ul {
            list-style: none;
            font-size: 13px;
            color: var(--text-muted);
        }

        .service-card ul li {
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .service-card ul li::before {
            content: "✓";
            color: var(--accent-green);
            font-weight: bold;
        }

        /* Models Showcase Tags Cloud */
        .tags-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            max-width: 900px;
            margin: 0 auto;
        }

        .model-tag {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.2s ease;
        }

        .model-tag:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--glow-cyan);
            transform: scale(1.05);
        }

        .model-tag.highlight {
            background: rgba(139, 92, 246, 0.05);
            border-color: var(--accent-purple);
            color: var(--accent-purple);
        }

        /* Solutions Block */
        .solution-section {
            background: var(--bg-tertiary);
        }

        .sol-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .sol-card {
            background: var(--bg-secondary);
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
        }

        .sol-card h3 {
            font-size: 22px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sol-card h3::before {
            content: "";
            display: inline-block;
            width: 8px;
            height: 20px;
            background: var(--accent-cyan);
            border-radius: 4px;
        }

        /* Custom Map Grid */
        .network-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .map-mockup {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            position: relative;
            min-height: 350px;
        }

        .map-placeholder {
            width: 100%;
            height: 100%;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            justify-content: center;
            align-content: center;
        }

        .city-node {
            background: var(--bg-tertiary);
            padding: 8px 16px;
            border-radius: 8px;
            border-left: 3px solid var(--accent-cyan);
            font-size: 13px;
            font-weight: 500;
        }

        /* Standardized Steps */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--bg-secondary);
            padding: 25px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            position: relative;
        }

        .step-num {
            position: absolute;
            top: -15px;
            left: 20px;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--neon-gradient);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 16px;
        }

        .step-card h3 {
            margin-top: 10px;
            font-size: 18px;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* Pricing & Token Compare */
        .compare-table-wrapper {
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            background: var(--bg-secondary);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14px;
        }

        th, td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        th {
            background-color: var(--bg-tertiary);
            color: var(--text-primary);
            font-weight: 600;
        }

        tr:last-child td {
            border-bottom: none;
        }

        .badge-tag {
            padding: 4px 8px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
        }

        .badge-cyan { background: rgba(6, 182, 212, 0.1); color: var(--accent-cyan); }
        .badge-purple { background: rgba(139, 92, 246, 0.1); color: var(--accent-purple); }
        .badge-green { background: rgba(16, 185, 129, 0.1); color: var(--accent-green); }

        /* Client reviews */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background: var(--bg-secondary);
            padding: 25px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-style: italic;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
        }

        .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-tertiary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--accent-purple);
        }

        .author-info h4 {
            font-size: 14px;
            font-weight: 600;
        }

        .author-info p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Cases Display */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--glow-cyan);
        }

        .case-img-wrap {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-tertiary);
        }

        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-content {
            padding: 20px;
        }

        .case-content h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .case-content p {
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* Training section styling */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
        }

        .training-list {
            list-style: none;
        }

        .training-item {
            background: var(--bg-secondary);
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .training-name {
            font-weight: 700;
            font-size: 16px;
        }

        .training-cert {
            font-size: 12px;
            background: rgba(16, 185, 129, 0.1);
            color: var(--accent-green);
            padding: 4px 10px;
            border-radius: 20px;
        }

        /* FAQ Accordion */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            background: var(--bg-secondary);
            margin-bottom: 12px;
            border-radius: 8px;
            overflow: hidden;
        }

        .faq-header {
            padding: 18px 24px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-header::after {
            content: "+";
            font-size: 20px;
            font-weight: normal;
        }

        .faq-item.active .faq-header::after {
            content: "−";
        }

        .faq-content {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .faq-item.active .faq-content {
            padding: 0 24px 20px 24px;
            max-height: 200px;
        }

        /* Troubleshooting Section */
        .trouble-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .trouble-card {
            background: var(--bg-secondary);
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .trouble-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--accent-purple);
        }

        .trouble-card p {
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* Dictionary Section */
        .dict-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .dict-item {
            background: var(--bg-secondary);
            padding: 20px;
            border-radius: 8px;
            border-left: 4px solid var(--accent-cyan);
            box-shadow: 0 2px 4px rgba(0,0,0,0.02);
        }

        .dict-item h4 {
            margin-bottom: 6px;
            font-size: 15px;
            font-weight: 700;
        }

        .dict-item p {
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* Form styling */
        .form-section {
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.03), rgba(139, 92, 246, 0.03)), var(--bg-secondary);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .contact-form {
            background: var(--bg-secondary);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 14px;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            transition: all 0.3s ease;
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--accent-cyan);
            box-shadow: var(--glow-cyan);
            background-color: #fff;
        }

        .form-textarea {
            resize: vertical;
            min-height: 120px;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .contact-detail-item {
            margin-bottom: 25px;
        }

        .contact-detail-item h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 5px;
        }

        .contact-detail-item p {
            font-size: 14px;
            color: var(--text-secondary);
        }

        .qr-box {
            margin-top: 15px;
            background: #fff;
            padding: 10px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            display: inline-block;
            max-width: 140px;
        }

        .qr-box img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Articles list */
        .articles-list {
            list-style: none;
        }

        .article-item {
            background: var(--bg-secondary);
            padding: 16px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: transform 0.2s;
        }

        .article-item:hover {
            transform: translateX(5px);
            border-color: var(--accent-cyan);
        }

        .article-item a {
            font-weight: 600;
            font-size: 14px;
            color: var(--text-primary);
        }

        .article-date {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Footer & Links */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
            border-bottom: 1px solid #334155;
            padding-bottom: 40px;
        }

        .footer-logo {
            
            max-height: 40px;
            margin-bottom: 15px;
        }

        .footer-links-col h4 {
            color: #fff;
            margin-bottom: 15px;
            font-size: 15px;
            font-weight: 700;
        }

        .footer-links-col ul {
            list-style: none;
        }

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

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .friend-links {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .friend-links a {
            color: #64748b;
        }

        .friend-links a:hover {
            color: #fff;
        }

        /* Back to top & float service */
        .floating-widgets {
            position: fixed;
            bottom: 30px;
            right: 30px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 999;
        }

        .widget-btn {
            width: 50px;
            height: 50px;
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 50%;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
        }

        .widget-btn:hover {
            transform: translateY(-3px);
            box-shadow: var(--glow-cyan);
            border-color: var(--accent-cyan);
        }

        .widget-btn svg {
            width: 22px;
            height: 22px;
            fill: var(--text-primary);
        }

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 10px;
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            width: 140px;
        }

        .widget-btn:hover .qr-popover {
            display: block;
        }

        /* Responsive adaptations */
        @media (max-width: 992px) {
            .grid-3, .cases-grid, .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero h1 { font-size: 2.3rem; }
            .about-grid, .network-grid, .form-grid {
                grid-template-columns: 1fr;
            }
            .hero-features {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-container {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
            .training-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-links.active {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .grid-3, .cases-grid, .reviews-grid, .dict-grid, .trouble-cards, .sol-grid {
                grid-template-columns: 1fr;
            }
            .hero-features {
                grid-template-columns: 1fr;
            }
            .steps-container {
                grid-template-columns: 1fr;
            }
            .hero h1 { font-size: 1.8rem; }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }