:root {
      --primary: #0062ff;
      --primary-hover: #0050d4;
      --accent: #00d2ff;
      --accent-warm: #ff6b00;
      --text-main: #111827;
      --text-muted: #4b5563;
      --text-light: #9ca3af;
      --bg-page: #f8faff;
      --bg-card: #ffffff;
      --border-color: #e5e7eb;
      --border-focus: #bfdbfe;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 20px -2px rgba(0, 98, 255, 0.08);
      --shadow-lg: 0 10px 30px -4px rgba(0, 98, 255, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    ul, ol {
      list-style: none;
    }

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      max-width: 180px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links li a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: #eff6ff;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #0062ff 0%, #00a2ff 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(0, 98, 255, 0.3);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #0052db 0%, #008be0 100%);
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(0, 98, 255, 0.4);
      color: #ffffff;
    }
    .btn-outline {
      background: #ffffff;
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #f0f7ff;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
      padding: 4px;
    }

    /* 首屏 Hero */
    .hero-section {
      background: linear-gradient(180deg, #f0f7ff 0%, #f8faff 100%);
      padding: 80px 0 60px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid rgba(0, 98, 255, 0.08);
    }
    .hero-wrapper {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: rgba(0, 98, 255, 0.1);
      border: 1px solid rgba(0, 98, 255, 0.2);
      border-radius: 30px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      color: #0b1528;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }
    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-btns {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }
    .btn-hero-primary {
      padding: 14px 32px;
      font-size: 16px;
    }
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .stat-card {
      background: #ffffff;
      padding: 20px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform 0.25s ease;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .stat-card .num {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .stat-card .label {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 模块通用样式 */
    .section {
      padding: 70px 0;
      position: relative;
    }
    .section-alt {
      background: #ffffff;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
    }

    /* 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .intro-content h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #0f172a;
    }
    .intro-content p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.8;
    }
    .intro-feature-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .intro-feature-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      background: #f8faff;
      padding: 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }
    .intro-feature-item svg {
      width: 20px;
      height: 20px;
      fill: var(--primary);
      flex-shrink: 0;
      margin-top: 2px;
    }
    .intro-feature-item strong {
      display: block;
      font-size: 14px;
      color: #0f172a;
      margin-bottom: 2px;
    }
    .intro-feature-item span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 服务与能力网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .service-card:hover {
      border-color: var(--border-focus);
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: #eff6ff;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #0f172a;
    }
    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }
    .service-tag {
      display: inline-block;
      font-size: 11px;
      color: var(--primary);
      background: #eff6ff;
      padding: 2px 8px;
      border-radius: 4px;
      margin-top: 14px;
      align-self: flex-start;
      font-weight: 600;
    }

    /* 流程与步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .flow-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      position: relative;
    }
    .flow-num {
      width: 40px;
      height: 40px;
      line-height: 40px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 800;
      border-radius: 50%;
      margin: 0 auto 16px;
      font-size: 16px;
      box-shadow: 0 4px 10px rgba(0, 98, 255, 0.3);
    }
    .flow-item h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #0f172a;
    }
    .flow-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测表格 */
    .compare-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .rating-banner {
      background: linear-gradient(135deg, #0062ff 0%, #00a2ff 100%);
      color: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .rating-title {
      font-size: 20px;
      font-weight: 700;
    }
    .rating-score {
      font-size: 32px;
      font-weight: 900;
      color: #ffea00;
      display: flex;
      align-items: baseline;
      gap: 8px;
    }
    .rating-score span {
      font-size: 16px;
      color: #ffffff;
      font-weight: normal;
    }
    .table-wrapper {
      overflow-x: auto;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .compare-table th {
      background: #f8faff;
      color: #0f172a;
      font-weight: 700;
    }
    .compare-table tr:hover td {
      background: #fafcff;
    }
    .highlight-col {
      color: var(--primary);
      font-weight: 700;
      background: #f0f7ff;
    }

    /* 模型矩阵与标签云 */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }
    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: #374151;
      box-shadow: 0 1px 2px rgba(0,0,0,0.03);
      transition: all 0.2s ease;
    }
    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #f0f7ff;
    }

    /* 用户评论 */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #eff6ff;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .review-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
    }
    .review-info p {
      font-size: 12px;
      color: var(--text-muted);
    }
    .review-stars {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 14px;
    }
    .review-text {
      font-size: 14px;
      color: #4b5563;
      line-height: 1.6;
    }

    /* 案例图片展示 */
    .media-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: center;
    }
    .media-card {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      background: #ffffff;
    }
    .media-card-body {
      padding: 16px;
    }
    .media-card-body h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .media-card-body p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      color: #0f172a;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-question:hover {
      background: #fafcff;
      color: var(--primary);
    }
    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: all 0.3s cubic-bezier(0, 1, 0, 1);
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 500px;
      padding-bottom: 20px;
      transition: all 0.3s ease-in-out;
    }
    .faq-icon {
      font-size: 18px;
      font-weight: 400;
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 表单与联系区 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .contact-details h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 16px;
      color: #0f172a;
    }
    .contact-details p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.6;
    }
    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 30px;
    }
    .info-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: var(--text-main);
    }
    .info-item strong {
      min-width: 80px;
      color: #0f172a;
    }
    .qr-box {
      background: #f8faff;
      border: 1px dashed var(--border-color);
      padding: 16px;
      border-radius: var(--radius-md);
      display: inline-block;
      text-align: center;
    }
    .qr-box img {
      width: 140px;
      height: 140px;
      margin: 0 auto 8px;
    }
    .qr-box span {
      font-size: 12px;
      color: var(--text-muted);
      font-weight: 600;
    }
    .form-box h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 20px;
      color: #0f172a;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: #374151;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #fdfdfd;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
    }
    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    /* 行业资讯 & 友情链接 */
    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }
    .article-links a {
      background: #f8faff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      font-size: 13px;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }
    .article-links a:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 14px;
    }
    .friend-links a {
      font-size: 13px;
      color: var(--text-muted);
      text-decoration: underline;
      text-underline-offset: 4px;
    }
    .friend-links a:hover {
      color: var(--primary);
    }

    /* 宣传图画廊展示 */
    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .banner-gallery-item {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      background: #ffffff;
    }
    .banner-gallery-item img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-top: 12px;
      max-width: 360px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 16px;
    }
    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col ul a {
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-col ul a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: var(--text-light);
    }

    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      transition: all 0.2s ease;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.05);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 32px;
      }
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid, .contact-wrapper, .media-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .banner-gallery {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .header-inner {
        position: relative;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-menu.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }
      .nav-actions {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 26px;
      }
      .hero-desc {
        font-size: 15px;
      }
      .grid-3, .grid-4, .flow-steps, .hero-stats {
        grid-template-columns: 1fr;
      }
      .section {
        padding: 50px 0;
      }
      .contact-wrapper {
        padding: 20px;
      }
    }