:root {
            --primary: #2563eb;
            --primary-hover: #1d4ed8;
            --secondary: #ea580c;
            --secondary-hover: #ca8a04;
            --dark: #0f172a;
            --light: #f8fafc;
            --gray: #64748b;
            --border: #e2e8f0;
            --success: #16a34a;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
        }

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

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

        /* Utility Classes */
        .text-center { text-align: center; }
        .badge {
            background-color: #dbeafe;
            color: var(--primary);
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.875rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 1rem;
        }
        .section-padding {
            padding: 5rem 0;
        }
        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 1rem;
        }
        .section-subtitle {
            color: var(--gray);
            font-size: 1.125rem;
            max-width: 700px;
            margin: 0 auto 3rem auto;
        }

        /* Header Navigation */
        .header {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 4.5rem;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .ai-page-logo {
            height: 2.5rem;
        }
        .nav-links {
            display: flex;
            gap: 1.5rem;
            align-items: center;
        }
        .nav-item {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--gray);
        }
        .nav-item:hover {
            color: var(--primary);
        }
        .nav-btn {
            background: var(--primary);
            color: white;
            padding: 0.5rem 1.25rem;
            border-radius: 0.375rem;
            font-weight: 600;
        }
        .nav-btn:hover {
            background: var(--primary-hover);
            color: white;
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: transparent;
        }
        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            transition: 0.3s;
        }

        /* Hero Section (No Image) */
        .hero {
            background: linear-gradient(135deg, #eff6ff 0%, #fae8ff 100%);
            padding: 6.5rem 0 5.5rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, transparent 70%);
            top: -100px;
            left: -100px;
        }
        .hero::after {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(234,88,12,0.1) 0%, transparent 70%);
            bottom: -150px;
            right: -150px;
        }
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 10;
        }
        .hero h1 {
            font-size: 3rem;
            font-weight: 900;
            letter-spacing: -0.05em;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 1.5rem;
        }
        .hero-highlight {
            background: linear-gradient(to right, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 1.25rem;
            color: var(--gray);
            margin-bottom: 2.5rem;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-block;
            padding: 0.75rem 2rem;
            border-radius: 0.375rem;
            font-weight: 700;
            text-align: center;
            transition: all 0.3s;
        }
        .btn-primary {
            background-color: var(--primary);
            color: white;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background-color: var(--secondary);
            color: white;
            box-shadow: 0 4px 14px rgba(234, 88, 12, 0.4);
        }
        .btn-secondary:hover {
            background-color: #d97706;
            transform: translateY(-2px);
        }

        /* Stats Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.5rem;
            margin-top: 4rem;
        }
        .stat-card {
            background: white;
            padding: 2rem;
            border-radius: 0.5rem;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
            border-top: 4px solid var(--primary);
            transition: transform 0.3s;
        }
        .stat-card:hover {
            transform: translateY(-5px);
        }
        .stat-card:nth-child(even) {
            border-top-color: var(--secondary);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 0.25rem;
        }
        .stat-label {
            color: var(--gray);
            font-size: 0.95rem;
        }

        /* About Section */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }
        .about-text h3 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .about-text p {
            color: var(--gray);
            margin-bottom: 1.5rem;
        }
        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        .about-feat-item {
            background: white;
            padding: 1.25rem;
            border-radius: 0.375rem;
            border-left: 3px solid var(--primary);
        }
        .about-feat-title {
            font-weight: 700;
            margin-bottom: 0.25rem;
        }
        .about-feat-desc {
            font-size: 0.85rem;
            color: var(--gray);
        }

        /* Service Cards */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .service-card {
            background: white;
            padding: 2.5rem 2rem;
            border-radius: 0.5rem;
            border: 1px solid var(--border);
            transition: all 0.3s;
        }
        .service-card:hover {
            box-shadow: 0 10px 25px -5px rgba(0,0,0,0.1);
            border-color: var(--primary);
            transform: translateY(-5px);
        }
        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            color: var(--primary);
        }
        .service-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .service-list {
            list-style: none;
            color: var(--gray);
            font-size: 0.95rem;
        }
        .service-list li {
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .service-list li::before {
            content: "✓";
            color: var(--success);
            font-weight: bold;
        }

        /* Process Steps */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2rem;
            position: relative;
        }
        .step-card {
            position: relative;
            background: white;
            padding: 2rem;
            border-radius: 0.5rem;
            border: 1px solid var(--border);
            z-index: 2;
        }
        .step-num {
            position: absolute;
            top: -1.5rem;
            left: 2rem;
            width: 3rem;
            height: 3rem;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.25rem;
            box-shadow: 0 4px 10px rgba(37,99,235,0.3);
        }
        .step-card:nth-child(even) .step-num {
            background: var(--secondary);
            box-shadow: 0 4px 10px rgba(234, 88, 12,0.3);
        }
        .step-title {
            font-weight: 700;
            font-size: 1.15rem;
            margin: 1rem 0 0.5rem 0;
        }
        .step-desc {
            font-size: 0.9rem;
            color: var(--gray);
        }

        /* Solutions Section */
        .solutions-tabs {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 2.5rem;
            flex-wrap: wrap;
        }
        .tab-btn {
            background: white;
            border: 1px solid var(--border);
            padding: 0.75rem 1.5rem;
            border-radius: 0.375rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        .tab-btn.active, .tab-btn:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }
        .solution-content {
            background: white;
            padding: 2.5rem;
            border-radius: 0.5rem;
            border: 1px solid var(--border);
        }
        .solution-pane {
            display: none;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
        }
        .solution-pane.active {
            display: grid;
        }

        /* Comparison Table & Performance */
        .table-responsive {
            overflow-x: auto;
            background: white;
            border-radius: 0.5rem;
            border: 1px solid var(--border);
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
        }
        .comp-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }
        .comp-table th, .comp-table td {
            padding: 1.25rem 1.5rem;
            border-bottom: 1px solid var(--border);
        }
        .comp-table th {
            background: #f1f5f9;
            font-weight: 700;
        }
        .comp-table tr:last-child td {
            border-bottom: none;
        }
        .comp-table tr.highlight {
            background: #eff6ff;
        }
        .badge-star {
            background: #fef3c7;
            color: #d97706;
            padding: 0.25rem 0.5rem;
            border-radius: 0.25rem;
            font-size: 0.8rem;
            font-weight: 700;
        }

        /* Case Studies */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .case-card {
            background: white;
            border-radius: 0.5rem;
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all 0.3s;
        }
        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        }
        .case-img-container {
            height: 200px;
            overflow: hidden;
            background: #e2e8f0;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-body {
            padding: 1.5rem;
        }
        .case-tag {
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.5rem;
        }
        .case-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .case-desc {
            font-size: 0.9rem;
            color: var(--gray);
        }

        /* Model tags cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            justify-content: center;
            max-width: 900px;
            margin: 0 auto;
        }
        .tag-item {
            background: white;
            border: 1px solid var(--border);
            padding: 0.5rem 1rem;
            border-radius: 9999px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.3s;
            cursor: default;
        }
        .tag-item:hover {
            border-color: var(--primary);
            background: #eff6ff;
            color: var(--primary);
        }

        /* FAQ Section */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: white;
            border: 1px solid var(--border);
            border-radius: 0.375rem;
            margin-bottom: 1rem;
            overflow: hidden;
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 1.25rem 1.5rem;
            background: white;
            border: none;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-question::after {
            content: "+";
            font-size: 1.5rem;
            color: var(--primary);
            transition: transform 0.3s;
        }
        .faq-question.active::after {
            content: "−";
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: #f8fafc;
        }
        .faq-answer-content {
            padding: 1.25rem 1.5rem;
            color: var(--gray);
            font-size: 0.95rem;
            border-top: 1px solid var(--border);
        }

        /* Feedback / Reviews */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .review-card {
            background: white;
            padding: 2rem;
            border-radius: 0.5rem;
            border: 1px solid var(--border);
            position: relative;
        }
        .review-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .review-avatar {
            width: 3rem;
            height: 3rem;
            border-radius: 50%;
            background: #cbd5e1;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: white;
        }
        .review-author {
            font-weight: 700;
            font-size: 0.95rem;
        }
        .review-title {
            color: var(--gray);
            font-size: 0.8rem;
        }
        .stars {
            color: #fbbf24;
            margin-bottom: 1rem;
        }

        /* Form Section */
        .form-section {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            color: white;
        }
        .form-section .section-title {
            color: white;
        }
        .form-section .section-subtitle {
            color: #94a3b8;
        }
        .form-wrapper {
            max-width: 600px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.05);
            padding: 3rem;
            border-radius: 0.5rem;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            font-size: 0.9rem;
            color: #cbd5e1;
        }
        .form-control {
            width: 100%;
            padding: 0.75rem 1rem;
            border-radius: 0.375rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(0,0,0,0.2);
            color: white;
            font-size: 1rem;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background: rgba(0,0,0,0.4);
        }

        /* Contact Details & QR Code */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            margin-top: 4rem;
        }
        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .contact-item {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
        }
        .contact-icon {
            font-size: 1.5rem;
            color: var(--primary);
        }
        .contact-details h4 {
            font-weight: 700;
            margin-bottom: 0.25rem;
        }
        .contact-details p {
            color: var(--gray);
        }
        .qr-area {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
            justify-content: center;
        }
        .qr-box {
            text-align: center;
            background: white;
            padding: 1.5rem;
            border-radius: 0.5rem;
            border: 1px solid var(--border);
            max-width: 180px;
        }
        .qr-box img {
            width: 120px;
            height: 120px;
            margin-bottom: 0.5rem;
        }
        .qr-label {
            font-size: 0.85rem;
            font-weight: 700;
        }

        /* Article & links list */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.5rem;
        }
        .article-card {
            background: white;
            padding: 1.5rem;
            border-radius: 0.375rem;
            border: 1px solid var(--border);
            transition: all 0.3s;
        }
        .article-card:hover {
            border-color: var(--primary);
        }
        .article-link {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--dark);
            display: block;
            margin-bottom: 0.5rem;
        }
        .article-link:hover {
            color: var(--primary);
        }

        /* Footer */
        .footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 4rem 0 2rem 0;
            border-top: 1px solid #1e293b;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2.5rem;
            margin-bottom: 3rem;
        }
        .footer-col h5 {
            color: white;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 0.75rem;
        }
        .footer-col ul li a:hover {
            color: white;
        }
        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 2rem;
            text-align: center;
            font-size: 0.875rem;
        }
        .friend-links {
            margin-top: 1rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .friend-links a {
            color: #64748b;
        }
        .friend-links a:hover {
            color: white;
        }

        /* Floating Contact Element */
        .floating-contact {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            z-index: 999;
            background: var(--primary);
            color: white;
            padding: 0.75rem 1.25rem;
            border-radius: 9999px;
            box-shadow: 0 10px 15px -3px rgba(37,99,235,0.4);
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            cursor: pointer;
        }

        .floating-contact:hover {
            background: var(--primary-hover);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 4.5rem;
                left: 0;
                right: 0;
                background: white;
                border-bottom: 1px solid var(--border);
                padding: 1.5rem;
                gap: 1rem;
                box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 2.25rem;
            }
            .about-grid, .solution-pane.active, .contact-grid {
                grid-template-columns: 1fr;
                gap: 2.5rem;
            }
        }