:root {
            --primary: #0a192f;
            --primary-light: #172a45;
            --accent: #ff6b6b; /* 明艳撞色：珊瑚红 */
            --accent-yellow: #feca57; /* 撞色：明黄 */
            --accent-blue: #00d2d3; /* 撞色：青蓝 */
            --text-dark: #2d3748;
            --text-light: #f7fafc;
            --text-gray: #718096;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-dark);
            background-color: var(--bg-light);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* Utility Classes */
        .section-padding {
            padding: 80px 0;
        }
        .text-center { text-align: center; }
        .badge {
            display: inline-block;
            padding: 6px 16px;
            font-size: 14px;
            font-weight: 700;
            border-radius: 50px;
            text-transform: uppercase;
            margin-bottom: 15px;
        }
        .badge-accent {
            background-color: var(--accent);
            color: var(--text-light);
        }
        .badge-yellow {
            background-color: var(--accent-yellow);
            color: var(--primary);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            border: none;
        }
        .btn-primary {
            background-color: var(--accent);
            color: var(--text-light);
        }
        .btn-primary:hover {
            background-color: #ff5252;
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
        }
        .btn-secondary {
            background-color: var(--primary);
            color: var(--text-light);
            border: 2px solid var(--accent-yellow);
        }
        .btn-secondary:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
        }
        .section-title {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 15px;
            font-weight: 800;
        }
        .section-desc {
            font-size: 18px;
            color: var(--text-gray);
            max-width: 700px;
            margin: 0 auto 50px auto;
        }

        /* Header & Navigation */
        header {
            background-color: rgba(10, 25, 47, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid var(--accent);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }
        .logo-box {
            display: flex;
            align-items: center;
        }
        .ai-page-logo {
            height: 40px;
            width: auto;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 20px;
        }
        .nav-menu a {
            color: var(--text-light);
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            padding: 8px 12px;
            border-radius: 4px;
        }
        .nav-menu a:hover {
            color: var(--accent-yellow);
            background-color: rgba(255,255,255,0.05);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 24px;
            cursor: pointer;
        }

        /* Hero Section (No Image) */
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: var(--text-light);
            padding: 120px 0 100px 0;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0,210,211,0.1) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }
        .hero h1 {
            font-size: 42px;
            line-height: 1.25;
            margin-bottom: 25px;
            color: var(--text-light);
            font-weight: 800;
        }
        .hero h1 span {
            color: var(--accent-yellow);
            position: relative;
            display: inline-block;
        }
        .hero p {
            font-size: 20px;
            color: #a0aec0;
            margin-bottom: 40px;
            line-height: 1.6;
        }
        .hero-btns {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-features {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 60px;
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 40px;
        }
        .hero-feature-item {
            text-align: center;
        }
        .hero-feature-item h3 {
            font-size: 24px;
            color: var(--accent-blue);
            margin-bottom: 5px;
        }
        .hero-feature-item p {
            font-size: 14px;
            margin-bottom: 0;
            color: var(--text-light);
        }

        /* About Section */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .about-img-box {
            position: relative;
            border: 4px solid var(--primary);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 10px 10px 0px var(--accent-yellow);
        }
        .about-text h3 {
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .about-text p {
            color: var(--text-gray);
            margin-bottom: 20px;
            font-size: 16px;
        }

        /* AIGC Services */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .service-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .service-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background-color: var(--accent-blue);
            transition: var(--transition);
        }
        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }
        .service-card:hover::after {
            background-color: var(--accent);
        }
        .service-icon {
            font-size: 36px;
            margin-bottom: 20px;
            color: var(--accent);
        }
        .service-card h3 {
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .service-card p {
            color: var(--text-gray);
            font-size: 15px;
        }

        /* Workflows */
        .workflow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
        }
        .workflow-step {
            background: var(--bg-white);
            padding: 30px;
            border-radius: 12px;
            border-top: 4px solid var(--primary);
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            position: relative;
        }
        .workflow-step:nth-child(even) {
            border-top-color: var(--accent);
        }
        .step-num {
            position: absolute;
            top: -20px;
            right: 20px;
            font-size: 48px;
            font-weight: 900;
            color: rgba(0,0,0,0.05);
        }
        .workflow-step h3 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--primary);
        }

        /* Solutions */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .solution-card {
            background: var(--bg-white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .solution-card:hover {
            transform: scale(1.02);
        }
        .solution-info {
            padding: 25px;
        }
        .solution-info h3 {
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .solution-info ul {
            list-style: none;
        }
        .solution-info li {
            font-size: 14px;
            color: var(--text-gray);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
        }
        .solution-info li::before {
            content: '✓';
            color: var(--accent-blue);
            margin-right: 8px;
            font-weight: bold;
        }

        /* Networks */
        .network-section {
            background-color: var(--primary);
            color: var(--text-light);
        }
        .network-grid {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 50px;
            align-items: center;
        }
        .network-info h3 {
            font-size: 28px;
            margin-bottom: 20px;
            color: var(--accent-yellow);
        }
        .network-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .network-item {
            background: rgba(255,255,255,0.05);
            padding: 20px;
            border-radius: 8px;
            border-left: 3px solid var(--accent);
        }

        /* Tech Standards */
        .standards-table-wrapper {
            background: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            overflow-x: auto;
        }
        .standards-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }
        .standards-table th, .standards-table td {
            padding: 15px 20px;
            border-bottom: 1px solid var(--border-color);
        }
        .standards-table th {
            background-color: var(--bg-light);
            color: var(--primary);
            font-weight: 700;
        }

        /* Case Studies */
        .cases-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .case-card {
            background: var(--bg-white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }
        .case-img-wrapper {
            position: relative;
            overflow: hidden;
        }
        .case-info {
            padding: 30px;
        }
        .case-info h3 {
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 15px;
        }

        /* Review Section */
        .review-wrapper {
            background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
            border-radius: 20px;
            padding: 50px;
            border: 2px solid var(--accent-yellow);
        }
        .review-grid {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: center;
        }
        .review-score {
            text-align: center;
            border-right: 1px solid rgba(0,0,0,0.1);
            padding-right: 40px;
        }
        .score-num {
            font-size: 80px;
            font-weight: 900;
            color: var(--accent);
            line-height: 1;
        }
        .score-stars {
            color: var(--accent-yellow);
            font-size: 24px;
            margin: 15px 0;
        }
        .review-table {
            width: 100%;
            border-collapse: collapse;
        }
        .review-table td {
            padding: 12px 15px;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }
        .review-table td:first-child {
            font-weight: bold;
            color: var(--primary);
        }

        /* Token Pricing & Models */
        .token-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .token-card {
            background: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            border: 1px solid var(--border-color);
        }
        .token-card h3 {
            margin-bottom: 20px;
            color: var(--primary);
            border-bottom: 2px solid var(--accent-blue);
            padding-bottom: 10px;
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-item {
            background-color: var(--bg-light);
            color: var(--primary);
            padding: 6px 12px;
            border-radius: 6px;
            font-size: 13px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .tag-item:hover {
            background-color: var(--accent-blue);
            color: var(--text-light);
            border-color: var(--accent-blue);
        }

        /* Training Sections */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }
        .training-card {
            background: var(--bg-white);
            border-radius: 10px;
            padding: 25px 20px;
            text-align: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .training-card:hover {
            transform: translateY(-5px);
            border-color: var(--accent);
        }
        .training-card h3 {
            font-size: 16px;
            color: var(--primary);
            margin-bottom: 10px;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-btn {
            width: 100%;
            background: none;
            border: none;
            padding: 20px;
            text-align: left;
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-btn::after {
            content: '+';
            font-size: 22px;
            transition: var(--transition);
        }
        .faq-btn.active::after {
            transform: rotate(45deg);
        }
        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 20px;
            color: var(--text-gray);
            font-size: 15px;
        }

        /* Troubleshooting & Glossary */
        .trouble-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .trouble-card, .glossary-card {
            background: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
        }
        .trouble-card h3, .glossary-card h3 {
            margin-bottom: 20px;
            color: var(--primary);
        }
        .step-list, .glossary-list {
            list-style: none;
        }
        .step-list li, .glossary-list li {
            margin-bottom: 15px;
            padding-left: 20px;
            position: relative;
        }
        .step-list li::before {
            content: '●';
            color: var(--accent);
            position: absolute;
            left: 0;
        }
        .glossary-list li strong {
            color: var(--accent-blue);
        }

        /* Articles / Knowledge Base */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .article-card {
            background: var(--bg-white);
            border-radius: 8px;
            padding: 25px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-card:hover {
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            border-color: var(--accent-blue);
        }
        .article-card h3 {
            font-size: 18px;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .article-card a {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
            font-size: 14px;
        }

        /* Testimonials */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .testimonial-card {
            background: var(--bg-white);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            border: 1px solid var(--border-color);
        }
        .testimonial-user {
            display: flex;
            align-items: center;
            margin-top: 20px;
        }
        .user-avatar {
            width: 40px;
            height: 40px;
            background-color: var(--accent-blue);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin-right: 15px;
        }
        .user-info h4 {
            font-size: 14px;
            color: var(--primary);
        }
        .user-info p {
            font-size: 12px;
            color: var(--text-gray);
        }

        /* Form / Contact */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }
        .form-wrapper {
            background: var(--bg-white);
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            border: 2px solid var(--primary);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--primary);
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            outline: none;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.15);
        }
        .contact-info {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .contact-details h3 {
            font-size: 24px;
            margin-bottom: 20px;
            color: var(--primary);
        }
        .qr-codes {
            display: flex;
            gap: 30px;
            margin-top: 30px;
        }
        .qr-item {
            text-align: center;
        }
        .qr-item img {
            width: 130px;
            height: 130px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 5px;
            background: white;
        }

        /* Footer */
        footer {
            background-color: var(--primary);
            color: var(--text-light);
            padding: 60px 0 30px 0;
            border-top: 4px solid var(--accent);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo img {
            height: 45px;
            margin-bottom: 20px;
        }
        .footer-col h4 {
            font-size: 16px;
            color: var(--accent-yellow);
            margin-bottom: 20px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #a0aec0;
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent-blue);
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 15px;
        }
        .friend-links a {
            color: #a0aec0;
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
        }
        .friend-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 30px;
            text-align: center;
            font-size: 14px;
            color: #a0aec0;
        }

        /* Floating Widget */
        .floating-widget {
            position: fixed;
            bottom: 40px;
            right: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .widget-btn {
            background-color: var(--accent);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: 0 4px 10px rgba(0,0,0,0.25);
            transition: var(--transition);
            cursor: pointer;
            font-size: 20px;
            font-weight: bold;
        }
        .widget-btn:hover {
            background-color: var(--accent-yellow);
            color: var(--primary);
            transform: scale(1.1);
        }

        /* Responsive Styles */
        @media (max-width: 1024px) {
            .solutions-grid { grid-template-columns: repeat(2, 1fr); }
            .training-grid { grid-template-columns: repeat(3, 1fr); }
            .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--primary);
                padding: 20px;
                border-bottom: 2px solid var(--accent);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .hero h1 { font-size: 32px; }
            .hero-features { grid-template-columns: repeat(2, 1fr); }
            .about-grid, .network-grid, .cases-grid, .review-grid, .token-grid, .trouble-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
            .workflow-timeline { grid-template-columns: 1fr; }
            .solutions-grid { grid-template-columns: 1fr; }
            .training-grid { grid-template-columns: repeat(2, 1fr); }
            .testimonials-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .review-score { border-right: none; border-bottom: 1px solid rgba(0,0,0,0.1); padding-bottom: 40px; padding-right: 0; }
        }