:root {
      --primary: #4f46e5;
      --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
      --primary-light: #eef2ff;
      --secondary: #06b6d4;
      --text-main: #0f172a;
      --text-sub: #475569;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 25px -5px rgba(99, 102, 241, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 20px 30px -10px rgba(79, 70, 229, 0.15);
      --radius: 12px;
    }

    * {
      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;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.2s ease;
    }
    a:hover {
      opacity: 0.85;
    }

    /* 容器规范 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .logo-box img {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* css 限制要求: .nav-links gap 设置为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
      margin: 0;
      padding: 0;
    }
    .nav-links li a {
      padding: 0.5rem 0.8rem;
      color: var(--text-sub);
      font-weight: 5rem;
      font-size: 0.92rem;
      border-radius: 6px;
      display: inline-block;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-nav {
      padding: 8px 18px;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 50px;
      color: #ffffff !important;
      background: var(--primary-gradient);
      box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-nav:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 首屏 Hero 区域 (无图片) */
    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% 0%, #e0e7ff 0%, #f8fafc 70%);
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid #c7d2fe;
      border-radius: 30px;
      font-size: 0.88rem;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: 0 2px 8px rgba(99,102,241,0.08);
    }
    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-sub);
      max-width: 800px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .hero-btns {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .btn-primary {
      padding: 14px 32px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: 50px;
      color: #ffffff;
      background: var(--primary-gradient);
      box-shadow: var(--shadow-md);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
    }
    .btn-secondary {
      padding: 14px 32px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 50px;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .btn-secondary:hover {
      background: #f1f5f9;
      transform: translateY(-2px);
    }

    /* 首屏数据指标卡片 */
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }
    .stat-card {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(8px);
      border: 1px solid #e0e7ff;
      border-radius: var(--radius);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
    }
    .stat-card:hover {
      transform: translateY(-3px);
    }
    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--text-sub);
    }

    /* 区块通用结构 */
    section {
      padding: 80px 0;
    }
    .section-header {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 50px;
    }
    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      margin-bottom: 10px;
      display: block;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-sub);
    }

    /* 平台介绍 & 关于我们 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .about-text h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 16px;
      line-height: 1.4;
    }
    .about-text p {
      color: var(--text-sub);
      margin-bottom: 20px;
      font-size: 1rem;
    }
    .feature-list-check {
      list-style: none;
      margin-bottom: 24px;
    }
    .feature-list-check li {
      position: relative;
      padding-left: 28px;
      margin-bottom: 10px;
      color: var(--text-main);
      font-weight: 500;
    }
    .feature-list-check li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: #10b981;
      font-weight: 800;
    }
    .about-media-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 16px;
      box-shadow: var(--shadow-md);
      text-align: center;
    }

    /* AIGC 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      transition: all 0.3s ease;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: #c7d2fe;
    }
    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 16px;
    }
    .service-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.5;
    }

    /* 一站式制作 */
    .one-stop-box {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      border-radius: 20px;
      padding: 50px;
      color: #ffffff;
      box-shadow: var(--shadow-lg);
    }
    .one-stop-box h3 {
      font-size: 1.8rem;
      color: #ffffff;
      margin-bottom: 20px;
    }
    .one-stop-box p {
      color: #c7d2fe;
      margin-bottom: 30px;
      max-width: 800px;
    }
    .one-stop-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 30px;
    }
    .model-tag {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #ffffff;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
    }

    /* 对比评测表格 */
    .comparison-wrapper {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }
    .review-score-banner {
      background: var(--primary-light);
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-color);
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-stars {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .stars-icon {
      color: #f59e0b;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }
    .score-val {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--primary);
    }
    .comp-table-container {
      overflow-x: auto;
    }
    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }
    .comp-table th, .comp-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .comp-table th {
      background: #f8fafc;
      font-weight: 700;
    }
    .comp-table tr:hover {
      background: #f8fafc;
    }
    .highlight-col {
      background: rgba(99, 102, 241, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* Token 比价 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }
    .token-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      text-align: center;
    }
    .token-price {
      font-size: 1.6rem;
      font-weight: 800;
      color: #10b981;
      margin: 12px 0 6px;
    }

    /* 行业方案 & 服务网络 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .solution-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
    }
    .solution-item h4 {
      font-size: 1.2rem;
      margin-bottom: 12px;
    }

    /* 案例中心 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .case-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }
    .case-info {
      padding: 20px;
    }
    .case-info h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

    /* 流程步骤 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 14px;
    }

    /* 客户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .avatar-fake {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .user-info h5 {
      font-size: 1rem;
      color: var(--text-main);
    }
    .user-info span {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px;
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }
    .faq-answer {
      padding: 0 20px 20px;
      color: var(--text-sub);
      font-size: 0.95rem;
      display: none;
      line-height: 1.6;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(180deg);
    }

    /* 表单与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .contact-form {
      background: #ffffff;
      padding: 32px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      font-size: 0.9rem;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      border: none;
      border-radius: 8px;
      background: var(--primary-gradient);
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
    }

    .contact-info-card {
      background: #ffffff;
      padding: 32px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
    }
    .qr-box {
      margin-top: 20px;
      text-align: center;
      padding: 20px;
      background: var(--bg-main);
      border-radius: 8px;
    }
    .qr-box img {
      max-width: 160px;
      height: auto;
      border-radius: 8px;
    }

    /* 加盟代理 */
    .partner-banner {
      background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
      border-radius: 20px;
      padding: 40px;
      color: #ffffff;
      text-align: center;
    }
    .partner-banner h3 {
      font-size: 1.8rem;
      margin-bottom: 12px;
    }

    /* 最新文章 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
    }
    .article-item {
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
    }

    /* 页脚 */
    footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
    }
    .footer-inner {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h5 {
      color: #ffffff;
      font-size: 1.05rem;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #94a3b8;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
      padding-top: 20px;
      border-top: 1px solid #1e293b;
    }
    .friend-links a {
      color: #94a3b8;
      font-size: 0.85rem;
    }
    .friend-links a:hover {
      color: #ffffff;
    }
    .copyright {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid #1e293b;
      font-size: 0.85rem;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--primary-gradient);
      color: #ffffff;
      width: 54px;
      height: 54px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      font-weight: bold;
      font-size: 0.85rem;
      text-align: center;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-stats, .solutions-grid, .cases-grid, .reviews-grid, .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid, .contact-wrapper, .footer-inner {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
    }
    @media (max-width: 576px) {
      .hero-stats, .solutions-grid, .cases-grid, .reviews-grid, .process-steps {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.8rem;
      }
    }