:root {
            --primary-color: #0052cc;
            --primary-hover: #003d99;
            --secondary-color: #00d2ff;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --bg-light: #f8fafc;
            --bg-white: #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);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
        }

        /* Reset */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-dark);
            background-color: var(--bg-light);
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

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

        /* Header Navigation */
        .header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: var(--transition);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .ai-page-logo {
            max-height: 45px;
            width: auto;
        }
        .brand-name {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .nav-menu {
            display: flex;
            gap: 0.5rem;
            list-style: none;
        }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-dark);
        }
        .nav-link:hover {
            color: var(--primary-color);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.6rem 1.25rem;
            border-radius: 6px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }
        .btn-primary {
            background-color: var(--primary-color);
            color: var(--bg-white);
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-1px);
        }
        .btn-outline {
            background-color: transparent;
            border: 1px solid var(--primary-color);
            color: var(--primary-color);
        }
        .btn-outline:hover {
            background-color: rgba(0, 82, 204, 0.05);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--text-dark);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Hero Section (No Images) */
        .hero {
            background: radial-gradient(circle at 80% 20%, rgba(0, 210, 255, 0.05) 0%, rgba(0, 82, 204, 0.05) 100%), var(--bg-white);
            padding: 5rem 0;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }
        .hero-badge {
            display: inline-block;
            background-color: rgba(0, 82, 204, 0.08);
            color: var(--primary-color);
            padding: 0.35rem 1rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
        }
        .hero h1 {
            font-size: 2.5rem;
            line-height: 1.25;
            margin-bottom: 1.5rem;
            color: var(--text-dark);
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 2.5rem;
        }
        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 1rem;
        }
        .hero-features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin-top: 4rem;
        }
        .hero-feat-card {
            background: var(--bg-white);
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .hero-feat-card h3 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }

        /* Section Layout */
        section {
            padding: 5rem 0;
            border-bottom: 1px solid var(--border-color);
        }
        .section-header {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        .section-header h2 {
            font-size: 2rem;
            color: var(--text-dark);
            margin-bottom: 0.75rem;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* About us section */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .about-text h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }
        .about-text p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }
        .about-img-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .about-img-container img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Services Grid */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .service-card {
            background: var(--bg-white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-color);
        }
        .service-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .service-card h3 {
            font-size: 1.25rem;
            margin-bottom: 0.75rem;
        }
        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* Scenario Section (One-stop production) */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.5rem;
        }
        .scenario-card {
            background: var(--bg-white);
            border-radius: 8px;
            padding: 1.5rem;
            border-left: 4px solid var(--primary-color);
            box-shadow: var(--shadow-sm);
        }
        .scenario-card h4 {
            font-size: 1.15rem;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }
        .scenario-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* Platforms list tag-cloud */
        .platform-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.75rem;
            max-width: 900px;
            margin: 0 auto;
        }
        .platform-tag {
            background: var(--bg-white);
            padding: 0.5rem 1rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-dark);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .platform-tag:hover {
            background: var(--primary-color);
            color: var(--bg-white);
            border-color: var(--primary-color);
        }

        /* Training section list */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.5rem;
        }
        .training-card {
            background: linear-gradient(135deg, var(--bg-white) 0%, #f1f5f9 100%);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1.5rem;
            text-align: center;
        }
        .training-card h4 {
            font-size: 1.1rem;
            color: var(--text-dark);
            margin-bottom: 0.5rem;
        }
        .training-card span {
            font-size: 0.8rem;
            color: var(--primary-color);
            font-weight: 600;
            background: rgba(0, 82, 204, 0.08);
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
        }

        /* Token Pricing & Comparison */
        .pricing-table-container {
            overflow-x: auto;
            background: var(--bg-white);
            border-radius: 8px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .pricing-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }
        .pricing-table th, .pricing-table td {
            padding: 1rem 1.5rem;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.95rem;
        }
        .pricing-table th {
            background-color: rgba(0, 82, 204, 0.03);
            color: var(--text-dark);
            font-weight: 600;
        }
        .pricing-table tbody tr:hover {
            background-color: rgba(0, 210, 255, 0.02);
        }

        /* Case Studies Grid (Using landscape images) */
        .cases-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .case-card {
            background: var(--bg-white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }
        .case-img-container {
            width: 100%;
            height: 240px;
            overflow: hidden;
            background: #e2e8f0;
        }
        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .case-card:hover .case-img-container img {
            transform: scale(1.05);
        }
        .case-info {
            padding: 1.5rem;
        }
        .case-info h4 {
            font-size: 1.25rem;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }
        .case-info p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* Rating & Evaluation Section */
        .rating-box {
            background: radial-gradient(circle at 10% 20%, rgba(0, 82, 204, 0.08) 0%, rgba(255, 255, 255, 0) 80%), var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 3rem;
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 2.5rem;
            align-items: center;
        }
        .rating-summary {
            text-align: center;
            border-right: 1px solid var(--border-color);
            padding-right: 2.5rem;
        }
        .rating-score {
            font-size: 4.5rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .rating-stars {
            color: #fbbf24;
            font-size: 1.5rem;
            margin: 0.5rem 0;
        }
        .rating-total {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .rating-details h4 {
            font-size: 1.4rem;
            margin-bottom: 1rem;
        }
        .rating-list {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.75rem;
        }
        .rating-list li {
            font-size: 0.95rem;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .rating-list li::before {
            content: "✓";
            color: var(--primary-color);
            font-weight: bold;
        }

        /* Testimonials Section */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 1.5rem;
        }
        .testimonial-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 2rem;
            box-shadow: var(--shadow-sm);
            position: relative;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1rem;
        }
        .author-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: var(--bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.1rem;
        }
        .author-meta h5 {
            font-size: 0.95rem;
            color: var(--text-dark);
        }
        .author-meta span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .testimonial-content {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-style: italic;
        }

        /* FAQ Accordion */
        .faq-list {
            max-width: 850px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-question {
            padding: 1.25rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-dark);
            user-select: none;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: rgba(0, 82, 204, 0.01);
        }
        .faq-answer-inner {
            padding: 1.5rem;
            border-top: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .faq-icon::after {
            content: "+";
            font-size: 1.2rem;
            font-weight: bold;
            color: var(--primary-color);
            transition: var(--transition);
        }
        .faq-item.active .faq-icon::after {
            content: "−";
        }

        /* Industry News */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .news-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            transition: var(--transition);
        }
        .news-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .news-img {
            height: 180px;
            background: #e2e8f0;
            overflow: hidden;
        }
        .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-body {
            padding: 1.5rem;
        }
        .news-title {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--text-dark);
        }
        .news-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }
        .news-link {
            font-size: 0.9rem;
            color: var(--primary-color);
            font-weight: 600;
        }

        /* Contact & Form Section */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
        }
        .contact-info-block {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
        }
        .contact-item-icon {
            font-size: 1.5rem;
            color: var(--primary-color);
        }
        .contact-item-text h5 {
            font-size: 1rem;
            margin-bottom: 0.25rem;
        }
        .contact-item-text p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .contact-qr-wrapper {
            margin-top: 1rem;
            display: flex;
            align-items: center;
            gap: 1.5rem;
            background: var(--bg-white);
            padding: 1rem;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            max-width: fit-content;
        }
        .contact-qr-wrapper img {
            width: 100px;
            height: 100px;
            border-radius: 4px;
        }

        /* Submission Form */
        .form-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: var(--shadow-md);
        }
        .form-group {
            margin-bottom: 1.25rem;
        }
        .form-label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 0.5rem;
        }
        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
        }
        .form-input:focus, .form-select:focus, .form-textarea:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
        }
        .form-textarea {
            resize: vertical;
            min-height: 100px;
        }

        /* Footer */
        .footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 4rem 0 2rem;
            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 h4 {
            color: #f1f5f9;
            font-size: 1.05rem;
            margin-bottom: 1.25rem;
            font-weight: 600;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .footer-col ul a:hover {
            color: var(--bg-white);
        }
        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1.5rem;
            font-size: 0.85rem;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .footer-links a {
            color: #64748b;
        }
        .footer-links a:hover {
            color: #94a3b8;
        }

        /* Floating Sidebar Support */
        .floating-service {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: var(--bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }
        .float-btn:hover {
            background-color: var(--primary-hover);
        }
        .float-tooltip {
            position: absolute;
            right: 60px;
            background: var(--bg-white);
            color: var(--text-dark);
            padding: 0.5rem 1rem;
            border-radius: 4px;
            box-shadow: var(--shadow-md);
            font-size: 0.85rem;
            white-space: nowrap;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .float-btn:hover .float-tooltip {
            opacity: 1;
            visibility: visible;
        }
        .float-qr {
            width: 150px;
            padding: 0.5rem;
        }
        .float-qr img {
            width: 134px;
            height: 134px;
            display: block;
        }

        /* Responsive */
        media-query { }
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .about-grid, .contact-grid, .rating-box {
                grid-template-columns: 1fr;
            }
            .rating-summary {
                border-right: none;
                border-bottom: 1px solid var(--border-color);
                padding-right: 0;
                padding-bottom: 2rem;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                flex-direction: column;
                padding: 1.5rem;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .nav-actions {
                display: none;
            }
            .hero {
                padding: 3rem 0;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-features {
                grid-template-columns: 1fr;
            }
            .rating-list {
                grid-template-columns: 1fr;
            }
        }