:root {
            --primary: #2563eb;
            --primary-light: #eff6ff;
            --accent: #7c3aed;
            --accent-light: #f5f3ff;
            --text-dark: #0f172a;
            --text-gray: #475569;
            --text-light: #94a3b8;
            --bg-light: #f8fafc;
            --border-color: #e2e8f0;
            --success: #10b981;
            --warning: #f59e0b;
        }

        * {
            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: #ffffff;
        }

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 头部导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
        }

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

        .logo-area {
            display: flex;
            align-items: center;
            height: 45px;
        }

        .logo-area img {
            height: 100%;
            width: auto;
        }

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

        .nav-menu a {
            text-decoration: none;
            color: var(--text-gray);
            font-weight: 500;
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            font-size: 14px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            border: none;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }

        .btn-outline {
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline:hover {
            background: var(--primary-light);
        }

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

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--text-dark);
            border-radius: 3px;
            transition: 0.3s;
        }

        /* Hero首屏 - 极致鲜亮纯代码视觉 */
        .hero {
            position: relative;
            background: radial-gradient(circle at 80% 20%, var(--accent-light) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, var(--primary-light) 0%, transparent 50%),
                        #ffffff;
            padding: 120px 0 80px;
            text-align: center;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: linear-gradient(var(--border-color) 1px, transparent 1px), linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
            background-size: 40px 40px;
            mask-image: radial-gradient(ellipse at center, black, transparent 70%);
            opacity: 0.3;
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
        }

        .badge-premium {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.1));
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(124, 58, 237, 0.2);
        }

        h1.hero-title {
            font-size: clamp(32px, 5vw, 54px);
            line-height: 1.2;
            color: var(--text-dark);
            font-weight: 800;
            margin-bottom: 24px;
        }

        h1.hero-title span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-gray);
            margin-bottom: 40px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-cta {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 48px;
        }

        .hero-cta .btn {
            padding: 16px 36px;
            font-size: 16px;
        }

        /* 数据指标 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            margin-top: 60px;
        }

        .metric-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 16px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.01);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .metric-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px rgba(0, 0, 0, 0.05);
        }

        .metric-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 14px;
            color: var(--text-gray);
            font-weight: 500;
        }

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

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

        .section-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 50px;
        }

        .section-tag {
            color: var(--primary);
            font-size: 14px;
            text-transform: uppercase;
            font-weight: 700;
            letter-spacing: 1.5px;
            margin-bottom: 10px;
            display: block;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 16px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-gray);
        }

        /* 关于我们与平台介绍 */
        .about-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

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

        .about-text {
            color: var(--text-gray);
            margin-bottom: 20px;
            font-size: 16px;
        }

        .about-features {
            list-style: none;
        }

        .about-features li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-weight: 500;
            color: var(--text-dark);
        }

        .about-features li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--success);
            font-weight: 800;
            font-size: 18px;
        }

        .platform-model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .model-tag {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 6px 12px;
            border-radius: 6px;
            font-size: 13px;
            color: var(--text-gray);
            font-weight: 500;
        }

        /* 服务能力卡片 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity 0.3s;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .service-icon {
            font-size: 36px;
            margin-bottom: 20px;
            display: inline-block;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

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

        /* 流程步骤 */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
            position: relative;
        }

        .step-item {
            position: relative;
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 12px;
            text-align: center;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            margin: 0 auto 20px;
            font-size: 16px;
        }

        .step-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-desc {
            font-size: 14px;
            color: var(--text-gray);
        }

        /* 解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .solution-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .solution-img-wrapper {
            position: relative;
            aspect-ratio: 16/9;
            background-color: var(--border-color);
            overflow: hidden;
        }

        .solution-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .solution-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .solution-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .solution-desc {
            font-size: 14px;
            color: var(--text-gray);
            margin-bottom: 20px;
        }

        /* 对比评测表格 */
        .comparison-wrapper {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            overflow-x: auto;
        }

        .evaluation-summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .evaluation-score {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .score-num {
            font-size: 48px;
            font-weight: 900;
            color: var(--accent);
            line-height: 1;
        }

        .stars {
            color: #fbbf24;
            font-size: 24px;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            font-weight: 700;
            color: var(--text-dark);
            background-color: var(--bg-light);
        }

        .comparison-table td {
            font-size: 14px;
            color: var(--text-gray);
        }

        .comparison-table tr:hover {
            background-color: rgba(37,99,235,0.01);
        }

        .highlight-col {
            color: var(--primary) !important;
            font-weight: 600;
        }

        /* Token 比价参考 */
        .token-price-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .price-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            position: relative;
        }

        .price-card.popular {
            border-color: var(--primary);
            box-shadow: 0 4px 15px rgba(37,99,235,0.08);
        }

        .price-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 4px;
        }

        .model-name {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .model-cost {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 15px;
        }

        .model-cost span {
            font-size: 14px;
            font-weight: 400;
            color: var(--text-gray);
        }

        .model-features {
            list-style: none;
            font-size: 13px;
            color: var(--text-gray);
        }

        .model-features li {
            margin-bottom: 8px;
        }

        /* 客户案例中心 & 行业资讯 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }

        .case-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
        }

        .case-media {
            width: 100%;
            aspect-ratio: 1.5;
            background: var(--border-color);
            overflow: hidden;
        }

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

        .case-info {
            padding: 20px;
        }

        .case-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .case-desc {
            font-size: 13px;
            color: var(--text-gray);
        }

        /* 微信客服及公众号浮动窗 */
        .wechat-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            text-align: center;
            max-width: 380px;
            margin: 0 auto;
        }

        .qr-wrapper {
            width: 180px;
            height: 180px;
            margin: 0 auto 20px;
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 10px;
            border-radius: 8px;
        }

        .qr-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        /* FAQ折叠面板 */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
            background: #ffffff;
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 24px;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background 0.3s;
        }

        .faq-question:hover {
            background-color: var(--bg-light);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #ffffff;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.6;
        }

        /* 客户评论卡片 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .review-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 12px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

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

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

        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
        }

        .user-info h4 {
            font-size: 14px;
            font-weight: 700;
        }

        .user-info span {
            font-size: 12px;
            color: var(--text-light);
        }

        /* 智能需求匹配与表单 */
        .form-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: start;
        }

        .contact-form-wrapper {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
        }

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

        .form-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;
            transition: border-color 0.3s;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
        }

        /* 全国服务网络 & 培训 */
        .network-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .badge-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 20px;
        }

        .badge-item {
            background: var(--primary-light);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
        }

        /* 页脚 */
        footer {
            background-color: var(--text-dark);
            color: #ffffff;
            padding: 60px 0 30px;
            font-size: 14px;
        }

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

        .footer-brand h3 {
            font-size: 20px;
            margin-bottom: 15px;
            font-weight: 700;
        }

        .footer-brand p {
            color: var(--text-light);
            margin-bottom: 20px;
            line-height: 1.8;
        }

        .footer-links h4 {
            font-size: 16px;
            margin-bottom: 20px;
            font-weight: 600;
        }

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

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

        .footer-links a {
            color: var(--text-light);
            text-decoration: none;
            transition: color 0.3s;
        }

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

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

        .footer-qr img {
            width: 120px;
            height: 120px;
            border-radius: 8px;
            margin-bottom: 10px;
            background: #fff;
            padding: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-light);
        }

        .friendship-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 15px;
        }

        .friendship-links a {
            color: var(--text-light);
            text-decoration: none;
            font-size: 13px;
        }

        .friendship-links a:hover {
            color: #ffffff;
        }

        /* 侧边悬停反馈 */
        .sticky-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .sticky-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #ffffff;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            cursor: pointer;
            position: relative;
            transition: all 0.3s;
        }

        .sticky-btn:hover {
            transform: scale(1.05);
            background: var(--primary-light);
        }

        .sticky-btn svg {
            width: 24px;
            height: 24px;
            fill: var(--primary);
        }

        .sticky-qr-pop {
            display: none;
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            text-align: center;
            width: 180px;
        }

        .sticky-qr-pop img {
            width: 150px;
            height: 150px;
        }

        .sticky-btn:hover .sticky-qr-pop {
            display: block;
        }

        /* 移动端适配 */
        @media (max-width: 992px) {
            .about-layout, .form-layout, .network-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: #ffffff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
                gap: 15px;
            }

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

            .menu-toggle {
                display: flex;
            }

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

            .hero-cta {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }

            .hero-cta .btn {
                width: 100%;
                max-width: 300px;
            }
        }