:root {
            --primary-gradient: linear-gradient(135deg, #0d9488 0%, #0ea5e9 100%);
            --primary-color: #0d9488;
            --secondary-color: #0ea5e9;
            --dark-color: #0f172a;
            --light-bg: #f8fafc;
            --card-bg: #ffffff;
            --text-main: #334155;
            --text-dark: #0f172a;
            --text-light: #64748b;
            --accent-color: #22d3ee;
            --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);
        }

        * {
            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-main);
            background-color: var(--light-bg);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        header {
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo-box {
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .logo-text {
            font-size: 20px;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 8px 12px;
            border-radius: 6px;
        }

        .nav-link:hover {
            color: var(--primary-color);
            background-color: rgba(13, 148, 136, 0.05);
        }

        .nav-btn {
            background: var(--primary-gradient);
            color: #fff;
            padding: 10px 20px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            box-shadow: var(--shadow-sm);
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            border: none;
            background: transparent;
        }

        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--text-dark);
            transition: var(--transition);
        }

        /* Hero Section (No Image) */
        .hero-section {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at top right, rgba(34, 211, 238, 0.08), transparent 40%),
                        radial-gradient(circle at bottom left, rgba(13, 148, 136, 0.05), transparent 40%),
                        #ffffff;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            background-color: rgba(13, 148, 136, 0.08);
            color: var(--primary-color);
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(13, 148, 136, 0.15);
        }

        .hero-title {
            font-size: 40px;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.25;
            max-width: 900px;
            margin: 0 auto 24px auto;
            letter-spacing: -0.5px;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto 40px auto;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: var(--primary-gradient);
            color: #fff;
            padding: 14px 32px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 14px rgba(13, 148, 136, 0.25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(13, 148, 136, 0.35);
        }

        .btn-secondary {
            background-color: #ffffff;
            color: var(--text-dark);
            border: 1px solid var(--border-color);
            padding: 14px 32px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
        }

        .btn-secondary:hover {
            background-color: var(--light-bg);
            border-color: #cbd5e1;
        }

        /* Section Global Settings */
        section {
            padding: 90px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-label {
            font-size: 14px;
            color: var(--primary-color);
            text-transform: uppercase;
            font-weight: 700;
            letter-spacing: 2px;
            display: block;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-dark);
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-light);
            max-width: 600px;
            margin: 12px auto 0 auto;
        }

        /* Stats Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .stats-card {
            background-color: var(--card-bg);
            border-radius: 12px;
            padding: 30px 24px;
            text-align: center;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .stats-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(13, 148, 136, 0.3);
        }

        .stats-num {
            font-size: 36px;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 8px;
        }

        .stats-name {
            font-size: 14px;
            color: var(--text-light);
            font-weight: 600;
        }

        /* About Us */
        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 24px;
            color: var(--text-dark);
            margin-bottom: 20px;
            font-weight: 700;
        }

        .about-text p {
            margin-bottom: 16px;
            font-size: 16px;
            color: var(--text-main);
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 24px;
        }

        .about-feat-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-dark);
        }

        .about-feat-item svg {
            color: var(--primary-color);
            flex-shrink: 0;
        }

        .about-image-wrapper {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        /* AIGC Models & Platforms (Tag Cloud / Grid) */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
            gap: 16px;
        }

        .platform-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 16px;
            border-radius: 8px;
            text-align: center;
            font-weight: 600;
            font-size: 14px;
            color: var(--text-dark);
            transition: var(--transition);
        }

        .platform-card:hover {
            background-color: rgba(13, 148, 136, 0.05);
            border-color: var(--primary-color);
            color: var(--primary-color);
            transform: translateY(-2px);
        }

        /* Services Cards */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 36px 30px;
            transition: var(--transition);
            position: relative;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(13, 148, 136, 0.3);
        }

        .service-icon {
            width: 56px;
            height: 56px;
            background-color: rgba(13, 148, 136, 0.1);
            color: var(--primary-color);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 14px;
        }

        .service-card p {
            color: var(--text-light);
            font-size: 14px;
            margin-bottom: 20px;
        }

        .service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-color);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* Process Steps */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
            position: relative;
        }

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

        .step-num {
            width: 60px;
            height: 60px;
            background: var(--primary-gradient);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            margin: 0 auto 20px auto;
            box-shadow: 0 4px 10px rgba(13, 148, 136, 0.2);
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-light);
        }

        /* Table Responsive Styles */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background-color: var(--card-bg);
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

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

        th {
            background-color: #f8fafc;
            padding: 16px 24px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-dark);
            border-bottom: 1px solid var(--border-color);
        }

        td {
            padding: 16px 24px;
            font-size: 14px;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-main);
        }

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

        /* Case Studies */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .case-card {
            background-color: var(--card-bg);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        .case-img-container {
            height: 200px;
            overflow: hidden;
            background-color: #f1f5f9;
            position: relative;
        }

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

        .case-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background-color: rgba(15, 23, 42, 0.85);
            color: #fff;
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
        }

        .case-body {
            padding: 24px;
        }

        .case-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .case-body p {
            color: var(--text-light);
            font-size: 14px;
            margin-bottom: 16px;
        }

        /* Form section */
        .form-section-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }

        .form-info h3 {
            font-size: 24px;
            color: var(--text-dark);
            margin-bottom: 16px;
            font-weight: 700;
        }

        .form-info p {
            color: var(--text-main);
            margin-bottom: 24px;
        }

        .form-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 40px;
            border-radius: 16px;
            box-shadow: var(--shadow-lg);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 14px;
            color: var(--text-dark);
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
        }

        select.form-control {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23475569'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            background-size: 16px;
            padding-right: 40px;
        }

        .form-submit-btn {
            width: 100%;
            padding: 14px;
            background: var(--primary-gradient);
            border: none;
            color: #fff;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .form-submit-btn:hover {
            opacity: 0.95;
            transform: translateY(-1px);
        }

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

        .faq-item {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
        }

        .faq-question svg {
            transition: var(--transition);
            color: var(--text-light);
            flex-shrink: 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            padding: 0 24px;
            font-size: 14px;
            color: var(--text-main);
            border-top: 1px solid transparent;
        }

        .faq-item.active {
            border-color: rgba(13, 148, 136, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .faq-item.active .faq-question svg {
            transform: rotate(180deg);
            color: var(--primary-color);
        }

        .faq-item.active .faq-answer {
            max-height: 200px; /* Adjust according to content size */
            padding-bottom: 20px;
            border-top-color: var(--border-color);
        }

        /* Testimonials (User Reviews) */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }

        .review-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 28px;
            position: relative;
        }

        .review-stars {
            color: #fbbf24;
            display: flex;
            gap: 4px;
            margin-bottom: 16px;
        }

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

        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .review-avatar {
            width: 44px;
            height: 44px;
            background-color: rgba(13, 148, 136, 0.1);
            color: var(--primary-color);
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }

        .review-meta h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-dark);
        }

        .review-meta p {
            font-size: 12px;
            color: var(--text-light);
        }

        /* Articles Section */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .article-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            transition: var(--transition);
        }

        .article-card:hover {
            border-color: var(--primary-color);
            transform: translateY(-2px);
        }

        .article-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .article-link {
            font-size: 14px;
            color: var(--primary-color);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Contact Details & Connect */
        .contact-info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 30px;
            margin-bottom: 48px;
        }

        .contact-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
        }

        .contact-card-icon {
            width: 48px;
            height: 48px;
            background-color: rgba(13, 148, 136, 0.08);
            color: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px auto;
        }

        .contact-card h4 {
            font-size: 16px;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .contact-card p {
            font-size: 14px;
            color: var(--text-light);
        }

        .qr-codes {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 40px;
        }

        .qr-item {
            text-align: center;
        }

        .qr-item img {
            width: 140px;
            height: 140px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 12px;
            padding: 4px;
            background-color: #fff;
        }

        .qr-item span {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-dark);
        }

        /* Footer */
        footer {
            background-color: var(--dark-color);
            color: #94a3b8;
            padding: 60px 0 30px 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 20px;
            margin-bottom: 16px;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 16px;
        }

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

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

        .footer-links a {
            font-size: 14px;
        }

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

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 14px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }

        .friend-links a {
            color: #64748b;
            font-size: 13px;
        }

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

        /* Float Widget */
        .float-widget {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 48px;
            height: 48px;
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .float-btn:hover {
            background-color: var(--primary-color);
            color: #fff;
            border-color: var(--primary-color);
        }

        .float-btn svg {
            width: 20px;
            height: 20px;
        }

        .float-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 16px;
            box-shadow: var(--shadow-lg);
            width: 160px;
            text-align: center;
            opacity: 0;
            pointer-events: none;
            transform: translateY(10px);
            transition: var(--transition);
        }

        .float-btn:hover .float-popover {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }

        .float-popover img {
            width: 120px;
            height: 120px;
            margin: 0 auto 8px auto;
        }

        .float-popover span {
            font-size: 12px;
            color: var(--text-dark);
            font-weight: 600;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background-color: #fff;
                border-bottom: 1px solid var(--border-color);
                padding: 24px;
                gap: 16px;
                box-shadow: var(--shadow-md);
            }

            .nav-menu.active {
                display: flex;
            }

            .menu-toggle {
                display: flex;
            }

            .menu-toggle.active span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }

            .menu-toggle.active span:nth-child(2) {
                opacity: 0;
            }

            .menu-toggle.active span:nth-child(3) {
                transform: rotate(-45deg) translate(7px, -8px);
            }

            .about-content, .form-section-container, .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .hero-title {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
        }