:root {
            --primary: #D32F2F; /* 艳红 */
            --primary-light: #FFEBEE;
            --primary-dark: #B71C1C;
            --accent: #FF9800; /* 热烈橙金 */
            --dark-bg: #1A1A1A;
            --light-bg: #FCF9F9;
            --white: #FFFFFF;
            --text-dark: #212121;
            --text-muted: #666666;
            --text-light: #F5F5F5;
            --border-color: #F5D6D6;
            --container-width: 1200px;
            --shadow: 0 4px 20px rgba(211, 47, 47, 0.08);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-dark);
            background-color: var(--light-bg);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--primary-dark);
        }

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

        ul, ol {
            list-style: none;
        }

        /* Layout Container */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 50px;
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(211, 47, 47, 0.3);
        }

        .btn-secondary {
            background-color: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }

        .btn-secondary:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
        }

        /* Section Global Styles */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
            position: relative;
        }

        .section-title h2 {
            font-size: 2.2rem;
            color: var(--primary-dark);
            margin-bottom: 15px;
            font-weight: 800;
        }

        .section-title p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
        }

        /* Header Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 3px solid var(--primary);
        }

        .header-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ai-page-logo {
            height: 48px;
            width: auto;
        }

        .logo-text {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: 1px;
        }

        .nav-menu {
            display: flex;
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-dark);
            padding: 8px 12px;
            border-radius: 4px;
        }

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

        .header-cta {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary-dark);
            cursor: pointer;
        }

        /* Hero Section (Strictly No Images) */
        .hero-section {
            background: radial-gradient(circle at 10% 20%, rgba(211, 47, 47, 0.05) 0%, rgba(255, 255, 255, 1) 90%);
            padding: 100px 0;
            text-align: center;
            border-bottom: none;
        }

        .hero-content {
            max-width: 900px;
            margin: 0 auto;
        }

        h1.main-title {
            font-size: 3rem;
            line-height: 1.25;
            color: var(--primary-dark);
            margin-bottom: 25px;
            font-weight: 900;
            letter-spacing: -0.5px;
        }

        .hero-subtitle {
            font-size: 1.4rem;
            color: var(--text-dark);
            margin-bottom: 35px;
            font-weight: 400;
        }

        .hero-tagline {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 20px;
            border: 1px solid var(--primary);
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            margin-bottom: 50px;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 50px;
        }

        .stat-card {
            background-color: var(--white);
            padding: 20px;
            border-radius: 12px;
            box-shadow: var(--shadow);
            border-top: 4px solid var(--primary);
            transition: var(--transition);
        }

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

        .stat-card .num {
            font-size: 2rem;
            font-weight: 850;
            color: var(--primary);
        }

        .stat-card .label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 5px;
        }

        /* About & Intro Section */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            color: var(--primary-dark);
            margin-bottom: 20px;
        }

        .about-text p {
            margin-bottom: 20px;
            color: var(--text-muted);
        }

        .features-bullet {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .bullet-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
        }

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

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

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

        .service-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            background-color: var(--primary);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow);
            border-color: var(--primary);
        }

        .service-card h3 {
            font-size: 1.3rem;
            color: var(--primary-dark);
            margin-bottom: 15px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }

        .tag-item {
            background-color: var(--primary-light);
            color: var(--primary-dark);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
        }

        /* One-stop creation workflow */
        .creation-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 25px;
        }

        .creation-card {
            background-color: var(--white);
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .creation-card:hover {
            transform: scale(1.03);
        }

        .creation-card h4 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--primary-dark);
        }

        /* Industry Solutions & Services Net */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .solution-card {
            background: linear-gradient(135deg, var(--white) 0%, var(--primary-light) 100%);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
        }

        .solution-card h3 {
            color: var(--primary-dark);
            margin-bottom: 15px;
        }

        .network-map {
            background-color: var(--white);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow);
            margin-top: 30px;
        }

        .network-list {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
            margin-top: 25px;
            text-align: center;
        }

        .network-item {
            padding: 10px;
            border-radius: 8px;
            background-color: var(--primary-light);
            font-weight: 600;
            color: var(--primary-dark);
        }

        /* Standardized Steps & Technical Standard */
        .steps-container {
            display: flex;
            justify-content: space-between;
            position: relative;
            gap: 20px;
            margin-top: 40px;
        }

        .step-item {
            flex: 1;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-num {
            width: 60px;
            height: 60px;
            background-color: var(--primary);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            margin: 0 auto 20px;
            box-shadow: 0 4px 10px rgba(211,47,47,0.3);
        }

        .step-item h4 {
            font-size: 1.1rem;
            margin-bottom: 10px;
        }

        .standards-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 30px;
            background-color: var(--white);
            box-shadow: var(--shadow);
            border-radius: 12px;
            overflow: hidden;
        }

        .standards-table th, .standards-table td {
            padding: 18px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }

        .standards-table th {
            background-color: var(--primary);
            color: var(--white);
            font-weight: 700;
        }

        /* Cases Grid (Showing Images) */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background-color: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-8px);
        }

        .case-img-container {
            position: relative;
            overflow: hidden;
            height: 220px;
            background-color: #EEE;
        }

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

        .case-card:hover .case-img-container img {
            transform: scale(1.08);
        }

        .case-info {
            padding: 20px;
        }

        .case-tag {
            background-color: var(--primary-light);
            color: var(--primary-dark);
            padding: 3px 8px;
            font-size: 0.75rem;
            border-radius: 4px;
            font-weight: 700;
        }

        .case-info h4 {
            margin: 10px 0;
            color: var(--primary-dark);
            font-size: 1.15rem;
        }

        /* Comparison Section */
        .comparison-wrapper {
            background-color: var(--white);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow);
        }

        .rating-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--primary-light);
            padding: 10px 20px;
            border-radius: 30px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 25px;
        }

        .rating-badge .stars {
            color: var(--accent);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
        }

        .compare-table th, .compare-table td {
            padding: 15px;
            text-align: center;
            border: 1px solid var(--border-color);
        }

        .compare-table th:first-child, .compare-table td:first-child {
            text-align: left;
            font-weight: 700;
        }

        .compare-table tr.highlight {
            background-color: var(--primary-light);
            font-weight: bold;
        }

        /* Forms & Match Section */
        .form-contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .matching-form {
            background-color: var(--white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: var(--shadow);
            border-top: 6px solid var(--primary);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 8px rgba(211,47,47,0.15);
        }

        .contact-info-card {
            background-color: var(--white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: var(--shadow);
        }

        .info-list-item {
            display: flex;
            gap: 15px;
            margin-bottom: 25px;
        }

        .info-list-item h5 {
            font-size: 1.1rem;
            color: var(--primary-dark);
            margin-bottom: 5px;
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 30px;
        }

        .qr-box {
            text-align: center;
            font-size: 0.85rem;
            font-weight: 600;
        }

        .qr-box img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
            border: 1px solid var(--border-color);
            padding: 5px;
            border-radius: 4px;
        }

        /* Token Pricing */
        .token-pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .price-card {
            background-color: var(--white);
            border: 2px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            transition: var(--transition);
        }

        .price-card.featured {
            border-color: var(--primary);
            transform: scale(1.05);
            box-shadow: var(--shadow);
            position: relative;
        }

        .price-card.featured::top {
            content: '推荐';
        }

        .price-val {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary-dark);
            margin: 20px 0;
        }

        /* Training section */
        .training-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .course-card {
            background-color: var(--white);
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--shadow);
            border-left: 5px solid var(--primary);
        }

        .course-card h4 {
            font-size: 1.25rem;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

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

        .faq-item {
            margin-bottom: 15px;
            border-bottom: 1px solid var(--border-color);
            background-color: var(--white);
            border-radius: 6px;
            overflow: hidden;
            box-shadow: 0 2px 5px rgba(0,0,0,0.02);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 20px;
            background: none;
            border: none;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary);
            transition: transform 0.2s;
        }

        .faq-item.active .faq-question::after {
            content: '-';
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 20px;
            color: var(--text-muted);
        }

        .faq-item.active .faq-answer {
            padding: 0 20px 20px 20px;
            max-height: 200px;
        }

        /* Self check list & encyclopedia */
        .troubleshooting-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .trouble-card {
            background-color: var(--white);
            padding: 30px;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }

        .trouble-card h4 {
            color: var(--primary-dark);
            margin-bottom: 15px;
            border-bottom: 2px solid var(--primary-light);
            padding-bottom: 8px;
        }

        .wiki-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .wiki-item {
            background-color: var(--white);
            padding: 20px;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }

        /* News & Knowledge base */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .article-card {
            background-color: var(--white);
            border-radius: 8px;
            padding: 25px;
            box-shadow: var(--shadow);
            border-top: 3px solid var(--border-color);
            transition: var(--transition);
        }

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

        .article-card h4 {
            margin-bottom: 15px;
            font-size: 1.1rem;
        }

        .article-link {
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 700;
        }

        /* Comments Slider/Grid */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .comment-card {
            background-color: var(--white);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--shadow);
            position: relative;
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .user-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
        }

        .user-meta h5 {
            font-size: 1rem;
        }

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

        /* Affiliate Section */
        .affiliate-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            color: var(--white);
            text-align: center;
        }

        .affiliate-section h2 {
            color: var(--white);
        }

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

        .affiliate-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
            margin: 40px 0;
        }

        .affiliate-card {
            background-color: rgba(255, 255, 255, 0.1);
            padding: 25px;
            border-radius: 8px;
            backdrop-filter: blur(5px);
        }

        /* Footer & Friends Links */
        footer {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 60px 0 20px;
            border-top: 5px solid var(--primary);
        }

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

        .footer-logo-area img {
            
            margin-bottom: 15px;
        }

        .footer-col h5 {
            font-size: 1.1rem;
            margin-bottom: 20px;
            color: var(--white);
            position: relative;
            padding-bottom: 8px;
        }

        .footer-col h5::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background-color: var(--primary);
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: #BBB;
        }

        .footer-links a:hover {
            color: var(--white);
            padding-left: 5px;
        }

        .friend-links-area {
            border-top: 1px solid #333;
            padding-top: 20px;
            margin-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.9rem;
        }

        .friend-links-area a {
            color: #888;
        }

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

        .copyright-area {
            border-top: 1px solid #333;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #888;
        }

        /* Float elements */
        .float-bar {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
            cursor: pointer;
            position: relative;
        }

        .float-btn:hover {
            background-color: var(--primary-dark);
        }

        .float-btn .tooltip-qr {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--white);
            padding: 10px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            display: none;
            text-align: center;
            color: var(--text-dark);
            border: 1px solid var(--border-color);
        }

        .float-btn .tooltip-qr img {
            width: 100px;
            height: 100px;
        }

        .float-btn:hover .tooltip-qr {
            display: block;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .solutions-grid, .cases-grid, .token-pricing-grid, .articles-grid, .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: var(--white);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }

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

            .menu-toggle {
                display: block;
            }

            .about-grid, .form-contact-grid, .training-grid, .troubleshooting-grid {
                grid-template-columns: 1fr;
            }

            .solutions-grid, .cases-grid, .token-pricing-grid, .articles-grid, .comments-grid {
                grid-template-columns: 1fr;
            }

            .steps-container {
                flex-direction: column;
                gap: 30px;
            }

            .network-list {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            h1.main-title {
                font-size: 2.2rem;
            }
        }