:root {
            --primary: #FFD300;
            --primary-dark: #E6BD00;
            --secondary: #121212;
            --text-dark: #1E1E24;
            --text-muted: #5F6368;
            --bg-light: #F9FAFB;
            --bg-white: #FFFFFF;
            --border-color: #E5E7EB;
            --max-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            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;
        }

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

        /* 顶部导航 */
        header {
            background-color: var(--secondary);
            color: var(--bg-white);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 3px solid var(--primary);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

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

        .ai-page-logo {
            height: 40px;
            display: block;
        }

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

        .nav-menu a {
            color: #E0E0E0;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .nav-menu a:hover, .nav-menu .active {
            color: var(--primary);
        }

        .nav-btn {
            background-color: var(--primary);
            color: var(--secondary) !important;
            padding: 8px 16px;
            border-radius: 4px;
            font-weight: bold;
            transition: var(--transition);
        }

        .nav-btn:hover {
            background-color: var(--bg-white);
            box-shadow: 0 4px 12px rgba(255, 211, 0, 0.3);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--bg-white);
            transition: var(--transition);
        }

        /* Hero 首屏 (无图片) */
        .hero {
            background: linear-gradient(135deg, #1A1A1A 0%, #0A0A0A 100%);
            color: var(--bg-white);
            padding: 100px 0 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
            border-bottom: 5px solid var(--primary);
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,211,0,0.05) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero-badge {
            background-color: var(--primary);
            color: var(--secondary);
            padding: 6px 16px;
            font-size: 14px;
            font-weight: 700;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--bg-white);
        }

        .hero h1 span {
            color: var(--primary);
        }

        .hero p {
            font-size: 1.2rem;
            color: #CCCCCC;
            max-width: 800px;
            margin: 0 auto 40px auto;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--secondary);
            padding: 15px 36px;
            font-size: 16px;
            font-weight: bold;
            border-radius: 6px;
            text-decoration: none;
            border: 2px solid var(--primary);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

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

        .btn-secondary {
            background-color: transparent;
            color: var(--bg-white);
            padding: 15px 36px;
            font-size: 16px;
            font-weight: bold;
            border-radius: 6px;
            text-decoration: none;
            border: 2px solid var(--bg-white);
            transition: var(--transition);
        }

        .btn-secondary:hover {
            background-color: var(--bg-white);
            color: var(--secondary);
        }

        /* 通用区块样式 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-light {
            background-color: var(--bg-white);
        }

        .section-gray {
            background-color: var(--bg-light);
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
            color: var(--secondary);
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 2px;
        }

        .section-header p {
            color: var(--text-muted);
            margin-top: 15px;
            font-size: 1.1rem;
        }

        /* 栅格系统 */
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

        /* 关于我们与平台介绍 */
        .about-box {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-left: 6px solid var(--primary);
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
        }

        .about-box h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--secondary);
        }

        .intro-features {
            list-style: none;
            margin-top: 20px;
        }

        .intro-features li {
            position: relative;
            padding-left: 25px;
            margin-bottom: 10px;
            font-size: 0.95rem;
        }

        .intro-features li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary-dark);
            font-weight: bold;
        }

        /* 数据指标卡片 */
        .stat-card {
            background-color: var(--secondary);
            color: var(--bg-white);
            padding: 30px 20px;
            text-align: center;
            border-radius: 8px;
            border-bottom: 4px solid var(--primary);
            transition: var(--transition);
        }

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

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .stat-label {
            font-size: 1rem;
            color: #CCCCCC;
        }

        /* 服务能力卡片 */
        .service-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            border-color: var(--primary);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            background-color: rgba(255, 211, 0, 0.1);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
            color: var(--secondary);
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .service-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 0.75rem;
            background: var(--secondary);
            color: var(--primary);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: bold;
        }

        /* 流程步骤 */
        .step-container {
            display: flex;
            justify-content: space-between;
            position: relative;
            gap: 20px;
        }

        .step-container::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 50px;
            right: 50px;
            height: 4px;
            background-color: var(--border-color);
            z-index: 1;
        }

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

        .step-number {
            width: 80px;
            height: 80px;
            background-color: var(--bg-white);
            border: 4px solid var(--secondary);
            color: var(--secondary);
            font-size: 24px;
            font-weight: 800;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px auto;
            transition: var(--transition);
        }

        .step-item:hover .step-number {
            border-color: var(--primary);
            background-color: var(--primary);
        }

        .step-item h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 对比表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: var(--bg-white);
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            border: 1px solid var(--border-color);
        }

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

        .comparison-table th, .comparison-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            background-color: var(--secondary);
            color: var(--bg-white);
            font-weight: bold;
        }

        .comparison-table tr:hover {
            background-color: rgba(255, 211, 0, 0.03);
        }

        .comparison-table td.highlight {
            font-weight: bold;
            color: var(--secondary);
            background-color: rgba(255, 211, 0, 0.05);
        }

        .rating-box {
            background: var(--secondary);
            color: var(--bg-white);
            padding: 24px;
            border-radius: 8px;
            text-align: center;
            margin-bottom: 30px;
            border: 2px solid var(--primary);
        }

        .rating-score {
            font-size: 3.5rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
        }

        .rating-stars {
            color: var(--primary);
            font-size: 1.5rem;
            margin: 10px 0;
        }

        /* Token 比价 */
        .token-card {
            background: var(--bg-white);
            border: 2px solid var(--border-color);
            border-radius: 8px;
            padding: 24px;
            text-align: center;
            transition: var(--transition);
        }

        .token-card:hover {
            border-color: var(--primary);
            transform: scale(1.02);
        }

        .token-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 10px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
        }

        .token-price {
            font-size: 1.8rem;
            font-weight: 800;
            color: #E03E1A;
            margin: 15px 0;
        }

        .token-price span {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 案例与素材展示 */
        .case-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            transition: var(--transition);
        }

        .case-card:hover {
            box-shadow: 0 8px 24px rgba(0,0,0,0.08);
        }

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: #ECECEC;
        }

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

        .case-card:hover .case-img-container img {
            transform: scale(1.05);
        }

        .case-info {
            padding: 20px;
        }

        .case-info h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--secondary);
        }

        .case-info p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* FAQ 折叠面板 */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-question {
            padding: 18px 24px;
            font-weight: bold;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: var(--bg-white);
            user-select: none;
            transition: var(--transition);
        }

        .faq-question:hover {
            background-color: rgba(255, 211, 0, 0.05);
        }

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

        .faq-item.active .faq-answer {
            padding: 18px 24px;
            max-height: 250px;
            border-top: 1px solid var(--border-color);
        }

        .faq-icon::after {
            content: '+';
            font-size: 1.4rem;
            font-weight: bold;
        }

        .faq-item.active .faq-icon::after {
            content: '-';
        }

        /* 客户评论 */
        .comment-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 8px;
            position: relative;
            box-shadow: 0 4px 6px rgba(0,0,0,0.01);
        }

        .comment-text {
            font-style: italic;
            color: var(--text-dark);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: var(--secondary);
        }

        .user-info h5 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }

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

        /* 需求提交表单区 */
        .form-section {
            background-color: var(--secondary);
            color: var(--bg-white);
        }

        .form-section .section-header h2 {
            color: var(--bg-white);
        }

        .form-container {
            max-width: 650px;
            margin: 0 auto;
            background: rgba(255,255,255,0.05);
            padding: 40px;
            border-radius: 12px;
            border: 1px solid rgba(255,255,255,0.1);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-size: 0.95rem;
            font-weight: 500;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border-radius: 6px;
            border: 1px solid rgba(255,255,255,0.2);
            background-color: rgba(255,255,255,0.08);
            color: var(--bg-white);
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            background-color: rgba(255,255,255,0.15);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        .submit-btn {
            background-color: var(--primary);
            color: var(--secondary);
            width: 100%;
            padding: 14px;
            border: none;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
        }

        .submit-btn:hover {
            background-color: var(--bg-white);
            box-shadow: 0 4px 15px rgba(255,211,0,0.4);
        }

        /* 标签云与文章链接列表 */
        .article-section {
            background-color: var(--bg-white);
        }

        .article-list {
            list-style: none;
            margin-bottom: 30px;
        }

        .article-list li {
            padding: 12px 0;
            border-bottom: 1px dashed var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .article-list a {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }

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

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .tag-item {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 6px 12px;
            border-radius: 4px;
            font-size: 0.85rem;
            color: var(--text-dark);
        }

        /* 页脚区域 */
        footer {
            background-color: #0A0A0A;
            color: #CCCCCC;
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
            border-top: 4px solid var(--primary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            margin-bottom: 20px;
        }

        .footer-title {
            color: var(--bg-white);
            font-size: 1.1rem;
            font-weight: bold;
            margin-bottom: 20px;
            position: relative;
            padding-left: 12px;
        }

        .footer-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 4px;
            background-color: var(--primary);
        }

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

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

        .footer-links a {
            color: #CCCCCC;
            text-decoration: none;
            transition: var(--transition);
        }

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

        .contact-info li {
            margin-bottom: 12px;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .qr-code-box {
            text-align: center;
        }

        .qr-code-box img {
            width: 120px;
            height: 120px;
            border: 4px solid var(--bg-white);
            border-radius: 4px;
            margin-bottom: 8px;
        }

        .friend-links-box {
            border-top: 1px solid #222222;
            padding-top: 20px;
            margin-top: 20px;
            font-size: 0.8rem;
        }

        .friend-links-box a {
            color: #888888;
            text-decoration: none;
            margin-right: 15px;
            display: inline-block;
            transition: var(--transition);
        }

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

        .copyright-bar {
            border-top: 1px solid #222222;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.8rem;
        }

        /* 侧边悬浮 */
        .floating-service {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-item {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: var(--secondary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            font-size: 20px;
            font-weight: bold;
            position: relative;
        }

        .float-item:hover {
            transform: scale(1.1);
            background-color: var(--secondary);
            color: var(--primary);
        }

        .float-item .popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 15px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            display: none;
            width: 150px;
            text-align: center;
        }

        .float-item .popover img {
            width: 100%;
            height: auto;
            border-radius: 4px;
        }

        .float-item:hover .popover {
            display: block;
        }

        /* 移动端自适应 */
        @media (max-width: 992px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .grid-3 { grid-template-columns: repeat(1, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .step-container { flex-direction: column; gap: 40px; }
            .step-container::before { display: none; }
        }

        @media (max-width: 768px) {
            .grid-2 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr; }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: var(--secondary);
                padding: 20px;
                border-bottom: 3px solid var(--primary);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .footer-grid { grid-template-columns: 1fr; }
            .copyright-bar {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }