:root {
            --primary: #008080;
            --primary-dark: #006666;
            --primary-light: #e0f2f1;
            --accent: #00b4d8;
            --accent-light: #e0f7fa;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --card-shadow: 0 10px 25px -5px rgba(0, 128, 128, 0.05), 0 8px 10px -6px rgba(0, 128, 128, 0.05);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
        }

        /* Reset & Base Styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-light);
            color: var(--text-dark);
        }
        body {
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, .btn {
            cursor: pointer;
            border: none;
            outline: none;
            font-weight: 600;
            border-radius: 8px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        /* Layout Container */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
            background-color: var(--bg-white);
        }
        section:nth-child(even) {
            background-color: var(--bg-light);
        }

        /* Header & Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 80, 80, 0.05);
            border-bottom: 1px solid var(--border-color);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .ai-page-logo {
            height: 40px;
            width: auto;
            object-fit: contain;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-links {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        .nav-links a {
            color: var(--text-dark);
            font-weight: 500;
            font-size: 14px;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-btn {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white !important;
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 14px;
        }
        .nav-btn:hover {
            opacity: 0.9;
            transform: translateY(-1px);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
        }
        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--text-dark);
            border-radius: 3px;
            transition: var(--transition);
        }

        /* Hero Section (No Images allowed) */
        .hero {
            padding: 150px 0 100px;
            background: radial-gradient(circle at 80% 20%, var(--accent-light) 0%, transparent 50%), 
                        linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
            text-align: center;
            position: relative;
        }
        .hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            box-shadow: 0 4px 10px rgba(0, 128, 128, 0.1);
        }
        .hero-title {
            font-size: 42px;
            line-height: 1.25;
            color: var(--text-dark);
            font-weight: 800;
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }
        .hero-title span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-subtitle {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            padding: 14px 32px;
            font-size: 16px;
            box-shadow: 0 10px 20px rgba(0, 128, 128, 0.2);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 25px rgba(0, 128, 128, 0.3);
        }
        .btn-secondary {
            background-color: var(--bg-white);
            color: var(--primary);
            border: 1px solid var(--primary);
            padding: 14px 32px;
            font-size: 16px;
        }
        .btn-secondary:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
        }

        /* Section Header */
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            position: relative;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            margin: 12px auto 0;
            border-radius: 2px;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 16px;
        }

        /* Metrics Grid */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
        .metric-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px 24px;
            text-align: center;
            box-shadow: var(--card-shadow);
            transition: var(--transition);
        }
        .metric-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }
        .metric-value {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* Services Section */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .service-card {
            background-color: var(--bg-white);
            border-radius: 16px;
            padding: 40px 30px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--card-shadow);
        }
        .service-card:hover {
            transform: translateY(-8px);
            border-color: var(--accent);
            box-shadow: 0 15px 30px rgba(0, 180, 216, 0.1);
        }
        .service-icon {
            width: 60px;
            height: 60px;
            background-color: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--primary);
        }
        .service-icon svg {
            width: 32px;
            height: 32px;
            fill: currentColor;
        }
        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-dark);
        }
        .service-card p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 20px;
        }
        .model-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .badge {
            background-color: var(--bg-light);
            color: var(--text-muted);
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 12px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .badge:hover {
            background-color: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }

        /* Solutions Grid */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .solution-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }
        .solution-card h3 {
            font-size: 18px;
            color: var(--primary);
            margin-bottom: 12px;
            font-weight: 700;
        }
        .solution-card p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* Process Steps */
        .process-steps {
            display: flex;
            flex-direction: column;
            gap: 30px;
            max-width: 800px;
            margin: 0 auto;
        }
        .step-item {
            display: flex;
            gap: 24px;
            align-items: flex-start;
            background-color: var(--bg-white);
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }
        .step-num {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            font-size: 20px;
            font-weight: 800;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .step-content h3 {
            font-size: 18px;
            margin-bottom: 8px;
            color: var(--text-dark);
        }
        .step-content p {
            color: var(--text-muted);
            font-size: 14px;
        }

        /* Compare Section & Table */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background-color: var(--bg-white);
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
            margin-top: 40px;
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }
        .compare-table th, .compare-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }
        .compare-table th {
            background-color: var(--bg-light);
            font-weight: 700;
            color: var(--text-dark);
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table .highlight {
            background-color: rgba(0, 128, 128, 0.03);
            font-weight: 600;
            color: var(--primary);
        }

        /* Token Price Section */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .price-card {
            background-color: var(--bg-white);
            border-radius: 16px;
            border: 1.5px solid var(--border-color);
            padding: 30px 24px;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .price-card.featured {
            border-color: var(--primary);
            box-shadow: 0 15px 35px rgba(0, 128, 128, 0.1);
        }
        .price-card.featured::top {
            content: '推荐';
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background-color: var(--primary);
            color: white;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
        }
        .price-card h3 {
            font-size: 20px;
            margin-bottom: 16px;
        }
        .price-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .price-num span {
            font-size: 14px;
            font-weight: normal;
            color: var(--text-muted);
        }
        .price-features {
            list-style: none;
            margin-bottom: 24px;
            text-align: left;
        }
        .price-features li {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .price-features li::before {
            content: '✓';
            color: var(--primary);
            font-weight: bold;
        }

        /* Cases Section (Using allowed images) */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .case-card {
            background-color: var(--bg-white);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
            transition: var(--transition);
        }
        .case-card:hover {
            transform: translateY(-5px);
        }
        .case-img-wrap {
            height: 200px;
            overflow: hidden;
            background-color: #eee;
        }
        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-info {
            padding: 24px;
        }
        .case-tag {
            color: var(--primary);
            font-weight: 600;
            font-size: 12px;
            margin-bottom: 8px;
            text-transform: uppercase;
        }
        .case-info h3 {
            font-size: 18px;
            margin-bottom: 12px;
            color: var(--text-dark);
        }
        .case-info p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }
        .testimonial-card {
            background-color: var(--bg-white);
            padding: 30px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }
        .rating {
            color: #fbbf24;
            font-size: 18px;
            margin-bottom: 12px;
        }
        .testimonial-content {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-style: italic;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .author-info h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-dark);
        }
        .author-info p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Form Section */
        .form-section-container {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: center;
        }
        .form-info h3 {
            font-size: 24px;
            margin-bottom: 16px;
        }
        .form-info p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .contact-methods {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .contact-method-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .contact-icon {
            width: 40px;
            height: 40px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .form-wrapper {
            background-color: var(--bg-white);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-dark);
        }
        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 14px;
            background-color: var(--bg-light);
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary);
            background-color: var(--bg-white);
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 128, 128, 0.1);
        }
        textarea.form-control {
            resize: vertical;
            height: 120px;
        }

        /* FAQ Accordion */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }
        .faq-header {
            padding: 20px 24px;
            background-color: var(--bg-white);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            transition: var(--transition);
        }
        .faq-header:hover {
            background-color: var(--bg-light);
        }
        .faq-header h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
        }
        .faq-icon {
            font-size: 18px;
            font-weight: bold;
            color: var(--primary);
            transition: var(--transition);
        }
        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            border-top: 0 solid var(--border-color);
        }
        .faq-content {
            padding: 20px 24px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .faq-item.active .faq-body {
            max-height: 500px;
            border-top-width: 1px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* Articles & Footer */
        .articles-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .articles-list li {
            border-bottom: 1px dashed var(--border-color);
            padding-bottom: 12px;
        }
        .articles-list a {
            display: block;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
        }
        .articles-list a:hover {
            color: var(--primary);
        }

        footer {
            background-color: var(--text-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            font-size: 14px;
            border-top: 4px solid var(--primary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            color: white;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
        }
        .footer-col h4::after {
            content: '';
            display: block;
            width: 30px;
            height: 2px;
            background-color: var(--primary);
            margin-top: 8px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.7);
        }
        .footer-col ul a:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        .footer-qrcode {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 15px;
        }
        .footer-qrcode img {
            width: 80px;
            height: 80px;
            border-radius: 8px;
            background-color: white;
            padding: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            text-align: center;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .friendship-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
            font-size: 13px;
        }
        .friendship-links a {
            color: rgba(255, 255, 255, 0.5);
        }
        .friendship-links a:hover {
            color: var(--accent);
        }

        /* Floating Widgets */
        .floating-widgets {
            position: fixed;
            bottom: 40px;
            right: 30px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 999;
        }
        .widget-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--bg-white);
            box-shadow: 0 4px 15px rgba(0, 80, 80, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: var(--primary);
            border: 1px solid var(--border-color);
            position: relative;
        }
        .widget-btn:hover {
            background-color: var(--primary);
            color: white;
        }
        .widget-qrcode {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: white;
            padding: 16px;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 140px;
            border: 1px solid var(--border-color);
        }
        .widget-qrcode img {
            width: 100px;
            height: 100px;
            margin-bottom: 8px;
        }
        .widget-qrcode span {
            font-size: 12px;
            color: var(--text-dark);
            display: block;
        }
        .widget-btn:hover .widget-qrcode {
            display: block;
        }

        /* Media Queries */
        @media (max-width: 992px) {
            .form-section-container {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-title {
                font-size: 34px;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            section {
                padding: 60px 0;
            }
        }