/* Modern CSS Variables & Resets */
        :root {
            --primary: #4f46e5;
            --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
            --bg-gradient: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
            --text-main: #0f172a;
            --text-muted: #475569;
            --bg-card: #ffffff;
            --border-color: #e2e8f0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.02);
            --accent-green: #10b981;
            --max-width: 1200px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: var(--bg-gradient);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
            scroll-behavior: smooth;
        }

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

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 800;
            line-height: 1.25;
        }

        h2 {
            font-size: 2.25rem;
            text-align: center;
            margin-bottom: 3rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        section {
            padding: 5rem 0;
            border-bottom: 1px solid var(--border-color);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 9999px;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: var(--primary-gradient);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid #e2e8f0;
            color: var(--text-main);
        }

        .btn-outline:hover {
            border-color: #6366f1;
            color: #6366f1;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 4.5rem;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .ai-page-logo {
            height: 2.25rem;
            width: auto;
        }

        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-menu {
            display: flex;
            gap: 1.5rem;
            align-items: center;
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        /* Hamburger Menu */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: transparent;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--text-main);
            transition: all 0.3s ease;
        }

        /* Hero Section (No Images) */
        .hero-section {
            padding: 8rem 0 6rem;
            background: radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.08) 0%, transparent 40%),
                        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.08) 0%, transparent 40%);
            text-align: center;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .hero-tag {
            display: inline-block;
            padding: 0.5rem 1.25rem;
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            border-radius: 9999px;
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 900;
            letter-spacing: -0.025em;
            margin-bottom: 1.5rem;
            color: var(--text-main);
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            margin-bottom: 2.5rem;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 4rem;
        }

        /* Info Metrics (Hero Footer) */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .metric-card {
            background: var(--bg-card);
            padding: 1.5rem;
            border-radius: 1rem;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease;
        }

        .metric-card:hover {
            transform: translateY(-5px);
        }

        .metric-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 0.25rem;
        }

        .metric-label {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        /* About Us & Software intro */
        .about-section {
            background: #ffffff;
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.75rem;
            margin-bottom: 1rem;
            color: var(--text-main);
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            font-size: 1.05rem;
        }

        .features-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.95rem;
            color: var(--text-main);
        }

        .feature-icon {
            color: var(--accent-green);
            font-weight: bold;
        }

        /* Service Cards */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 1.25rem;
            padding: 2rem;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: #a855f7;
        }

        .service-icon {
            width: 3rem;
            height: 3rem;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
            border-radius: 0.75rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .service-title {
            font-size: 1.25rem;
            margin-bottom: 0.75rem;
            color: var(--text-main);
        }

        .service-desc {
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        /* Model Badges Block */
        .models-block {
            margin-top: 3rem;
            padding: 2rem;
            background: rgba(99, 102, 241, 0.03);
            border-radius: 1rem;
            border: 1px dashed var(--border-color);
            text-align: center;
        }

        .models-title {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .badges-flex {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.5rem 1rem;
        }

        .model-badge {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-main);
        }

        /* Workflow Step CSS */
        .workflow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            position: relative;
        }

        .workflow-step {
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 3.5rem;
            height: 3.5rem;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.25rem;
            margin: 0 auto 1.5rem;
            box-shadow: 0 4px 10px rgba(168, 85, 247, 0.3);
        }

        .step-title {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: var(--text-main);
        }

        .step-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Solutions Section */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .solution-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            padding: 2rem;
            transition: all 0.3s ease;
        }

        .solution-card:hover {
            box-shadow: var(--shadow-md);
            border-color: #6366f1;
        }

        /* Network & Process map */
        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 4rem;
            align-items: center;
        }

        .network-map {
            background: radial-gradient(circle, rgba(99,102,241,0.05) 0%, rgba(236,72,153,0.05) 100%);
            border-radius: 1.5rem;
            padding: 3rem;
            border: 1px solid var(--border-color);
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .city-node {
            background: #ffffff;
            padding: 1rem;
            border-radius: 0.75rem;
            text-align: center;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .city-name {
            font-weight: 700;
            color: var(--text-main);
        }

        .city-desc {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* Technical Standards */
        .tech-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .tech-card {
            background: rgba(255, 255, 255, 0.6);
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            padding: 2rem;
            backdrop-filter: blur(10px);
        }

        /* Cases Grid (Displays Images) */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2.5rem;
        }

        .case-card {
            background: #ffffff;
            border-radius: 1.25rem;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .case-img-container {
            width: 100%;
            height: 250px;
            overflow: hidden;
            background: #f1f5f9;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .case-card:hover .case-img-container img {
            transform: scale(1.05);
        }

        .case-info {
            padding: 1.5rem;
        }

        .case-tag {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.5rem;
            display: inline-block;
        }

        .case-title {
            font-size: 1.25rem;
            margin-bottom: 0.5rem;
            color: var(--text-main);
        }

        .case-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Compare Matrix */
        .compare-table-wrapper {
            overflow-x: auto;
            border-radius: 1rem;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            background: #ffffff;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

        .compare-table th, .compare-table td {
            padding: 1.25rem 1.5rem;
            border-bottom: 1px solid var(--border-color);
        }

        .compare-table th {
            background: #f8fafc;
            font-weight: 700;
            color: var(--text-main);
        }

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

        .compare-highlight {
            background: rgba(99, 102, 241, 0.04);
            font-weight: 600;
        }

        .rating-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            background: #fef3c7;
            color: #d97706;
            font-size: 0.85rem;
            font-weight: 700;
        }

        /* Forms & Match Matching */
        .demand-section {
            background: #ffffff;
        }

        .demand-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 4rem;
        }

        .form-card {
            background: #f8fafc;
            border: 1px solid var(--border-color);
            border-radius: 1.5rem;
            padding: 2.5rem;
            box-shadow: var(--shadow-sm);
        }

        .form-title {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            color: var(--text-main);
        }

        .form-group {
            margin-bottom: 1.25rem;
        }

        .form-label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-main);
        }

        .form-control {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 0.5rem;
            font-size: 0.95rem;
            background: #ffffff;
            transition: border-color 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
        }

        /* Token Table Pricing */
        .token-pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .token-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            padding: 1.5rem;
            text-align: center;
        }

        .token-price {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--primary);
            margin: 1rem 0;
        }

        /* Training & Certs */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 1.25rem;
        }

        .training-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 0.75rem;
            padding: 1.5rem;
            text-align: center;
            transition: all 0.3s ease;
        }

        .training-card:hover {
            transform: scale(1.03);
            border-color: #ec4899;
        }

        .training-card h4 {
            font-size: 1rem;
            color: var(--text-main);
            margin-top: 0.5rem;
        }

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

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 0.75rem;
            margin-bottom: 1rem;
            overflow: hidden;
        }

        .faq-question {
            padding: 1.25rem 1.5rem;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            color: var(--text-main);
        }

        .faq-answer {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            display: none;
        }

        .faq-icon {
            transition: transform 0.3s ease;
        }

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

        /* Troubleshoot steps */
        .troubleshoot-flow {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .troubleshoot-card {
            background: rgba(99, 102, 241, 0.02);
            border: 1px solid var(--border-color);
            border-radius: 0.75rem;
            padding: 1.5rem;
        }

        /* Terms / Cloud Tag */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            justify-content: center;
        }

        .tag-pill {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 0.5rem 1rem;
            border-radius: 9999px;
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: all 0.3s ease;
        }

        .tag-pill:hover {
            background: var(--primary-gradient);
            color: #ffffff;
            border-color: transparent;
        }

        /* User Testimonials */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .comment-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            padding: 2rem;
            box-shadow: var(--shadow-sm);
        }

        .comment-text {
            font-style: italic;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .user-info h5 {
            font-weight: 700;
            color: var(--text-main);
        }

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

        /* Articles list */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 1.5rem;
        }

        .article-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 0.75rem;
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: all 0.3s ease;
        }

        .article-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .article-card h4 {
            font-size: 0.95rem;
            color: var(--text-main);
            margin-bottom: 1rem;
            line-height: 1.4;
        }

        .article-link {
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }

        /* Sticky Service Widget */
        .sticky-widget {
            position: fixed;
            right: 1.5rem;
            bottom: 5rem;
            z-index: 999;
            background: #ffffff;
            box-shadow: var(--shadow-lg);
            border-radius: 1rem;
            border: 1px solid var(--border-color);
            padding: 1rem;
            width: 160px;
            text-align: center;
        }

        .widget-qr {
            width: 100px;
            height: 100px;
            margin: 0.5rem auto;
            border-radius: 0.5rem;
            overflow: hidden;
        }

        .widget-qr img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .widget-info {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
        }

        .widget-link {
            display: block;
            margin-top: 0.5rem;
            padding: 0.25rem 0.5rem;
            background: var(--primary-gradient);
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 4px;
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 4rem 0 2rem;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-brand h4 {
            color: #ffffff;
            margin-bottom: 1rem;
        }

        .footer-brand p {
            margin-bottom: 1.5rem;
        }

        .footer-links h5 {
            color: #ffffff;
            margin-bottom: 1.25rem;
            font-weight: 700;
        }

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

        .footer-links li {
            margin-bottom: 0.75rem;
        }

        .footer-links a:hover {
            color: #ffffff;
        }

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .friend-links {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

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

        .friend-links a:hover {
            color: #94a3b8;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            h2 { font-size: 1.85rem; }
            .metrics-grid { grid-template-columns: repeat(2, 1fr); }
            .services-grid { grid-template-columns: repeat(2, 1fr); }
            .workflow-timeline { grid-template-columns: repeat(2, 1fr); }
            .solutions-grid { grid-template-columns: repeat(2, 1fr); }
            .network-grid { grid-template-columns: 1fr; }
            .cases-grid { grid-template-columns: 1fr; }
            .demand-grid { grid-template-columns: 1fr; }
            .comments-grid { grid-template-columns: repeat(2, 1fr); }
            .articles-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .training-grid { grid-template-columns: repeat(3, 1fr); }
        }

        @media (max-width: 768px) {
            .menu-toggle { display: flex; }
            .nav-menu {
                display: none;
                position: absolute;
                top: 4.5rem;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 1.5rem;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
            }
            .nav-menu.active { display: flex; }
            .nav-actions { display: none; }
            .hero-title { font-size: 2.25rem; }
            .about-grid { grid-template-columns: 1fr; }
            .tech-grid { grid-template-columns: 1fr; }
            .token-pricing-grid { grid-template-columns: 1fr; }
            .troubleshoot-flow { grid-template-columns: 1fr; }
            .training-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
            .sticky-widget { display: none; }
        }