:root {
      --primary: #4f46e5;
      --secondary: #06b6d4;
      --accent: #f43f5e;
      --rainbow-gradient: linear-gradient(135deg, #ff6b6b 0%, #feca57 25%, #48dbfb 50%, #ff9ff3 75%, #54a0ff 100%);
      --soft-rainbow: linear-gradient(135deg, rgba(255, 107, 107, 0.08) 0%, rgba(254, 202, 87, 0.08) 25%, rgba(72, 219, 251, 0.08) 50%, rgba(255, 159, 243, 0.08) 75%, rgba(84, 160, 255, 0.08) 100%);
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius: 12px;
      --shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 10px 25px -3px rgba(0, 0, 0, 0.1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      min-width: 320px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .logo-container {
      max-width: 140px;
      display: flex;
      align-items: center;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-item {
      padding: 8px 14px;
      font-weight: 500;
      font-size: 15px;
      color: var(--text-main);
      border-radius: 6px;
      transition: all 0.2s;
    }

    .nav-item:hover {
      color: var(--primary);
      background-color: rgba(79, 70, 229, 0.05);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      border-radius: 8px;
      padding: 10px 20px;
      cursor: pointer;
      transition: all 0.25s ease;
      font-size: 14px;
      border: 1px solid transparent;
      text-align: center;
    }

    .btn-rainbow {
      background: var(--rainbow-gradient);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
    }

    .btn-rainbow:hover {
      box-shadow: 0 6px 20px rgba(255, 107, 107, 0.45);
      transform: translateY(-2px);
    }

    .btn-outline {
      border-color: #cbd5e1;
      background: #ffffff;
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 区域通用样式 */
    .section {
      padding: 80px 0;
      position: relative;
    }

    .section-rainbow-bg {
      background: var(--soft-rainbow);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

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

    /* 首屏 Hero 无图片纯科技风设计 */
    .hero-section {
      padding: 90px 0 80px 0;
      background: radial-gradient(circle at 50% 10%, rgba(255, 159, 243, 0.15), rgba(72, 219, 251, 0.1) 40%, rgba(248, 250, 252, 1) 70%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      color: #334155;
      margin-bottom: 24px;
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background-color: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    .hero-title {
      font-size: 46px;
      line-height: 1.25;
      font-weight: 800;
      color: #0f172a;
      max-width: 860px;
      margin: 0 auto 20px auto;
    }

    .rainbow-text {
      background: var(--rainbow-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-sub {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto 36px auto;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 60px;
      flex-wrap: wrap;
    }

    .hero-cta-btn {
      padding: 14px 32px;
      font-size: 16px;
    }

    .hero-data-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      padding: 30px;
      border-radius: 16px;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-color);
    }

    .data-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
    }

    .data-item:last-child {
      border-right: none;
    }

    .data-val {
      font-size: 32px;
      font-weight: 800;
      color: #0f172a;
      margin-bottom: 4px;
    }

    .data-lbl {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 平台矩阵展示 */
    .models-bar {
      padding: 24px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-tag {
      padding: 6px 14px;
      background: #f1f5f9;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 500;
      color: #475569;
      border: 1px solid #e2e8f0;
      transition: all 0.2s;
    }

    .model-tag:hover {
      background: #ffffff;
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* 服务与能力 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: #cbd5e1;
    }

    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--soft-rainbow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 18px;
    }

    .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;
    }

    /* 案例中心 */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }

    .media-card {
      background: #ffffff;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow);
    }

    .media-img-wrap {
      width: 100%;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-card-body {
      padding: 24px;
    }

    .media-card-body h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    /* 对比评测表格 */
    .compare-container {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow);
      overflow-x: auto;
      padding: 30px;
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 24px;
      background: linear-gradient(90deg, rgba(79, 70, 229, 0.06), rgba(6, 182, 212, 0.06));
      border-radius: 12px;
      margin-bottom: 24px;
    }

    .score-left {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-num {
      font-size: 36px;
      font-weight: 800;
      color: var(--primary);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 15px;
    }

    .compare-table th {
      background: #f8fafc;
      color: #334155;
      font-weight: 600;
    }

    .compare-table .highlight-col {
      background: rgba(79, 70, 229, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* 流程步骤 */
    .steps-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

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

    .step-num {
      font-size: 28px;
      font-weight: 800;
      color: rgba(79, 70, 229, 0.2);
      margin-bottom: 12px;
    }

    .step-box h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-box p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .review-meta h5 {
      font-size: 15px;
      font-weight: 600;
    }

    .review-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }

    .review-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.6;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      transition: all 0.2s;
    }

    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
      font-size: 16px;
      background: #ffffff;
    }

    .faq-toggle-icon {
      font-size: 18px;
      transition: transform 0.2s;
      color: var(--primary);
    }

    .faq-answer {
      padding: 0 24px 18px 24px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.6;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }

    /* 需求表单与联系 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow);
      padding: 40px;
    }

    .contact-info {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-detail-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin: 24px 0;
    }

    .contact-detail-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 15px;
      color: #334155;
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: #f8fafc;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      max-width: 320px;
    }

    .qr-img-box {
      width: 80px;
      height: 80px;
      flex-shrink: 0;
    }

    .form-box {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 14px;
      font-weight: 600;
      color: #334155;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s;
      background: #ffffff;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
    }

    .form-textarea {
      resize: vertical;
      min-height: 100px;
    }

    /* 资讯与外链展示 */
    .article-links-container {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-btn-item {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 13px;
      color: #334155;
    }

    .article-btn-item:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 友情链接区 */
    .friend-links-area {
      padding: 24px 0;
      border-top: 1px solid var(--border-color);
      background: #ffffff;
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      font-size: 13px;
    }

    .friend-links-wrap a {
      color: var(--text-muted);
    }

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

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 18px;
      margin-bottom: 12px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 15px;
      margin-bottom: 14px;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
    }

    /* 浮动客服 */
    .floating-service {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-main);
      font-size: 18px;
      transition: all 0.2s;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .service-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-data-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      .data-item:nth-child(2) {
        border-right: none;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-title {
        font-size: 32px;
      }
      .service-grid, .reviews-grid, .media-card-grid {
        grid-template-columns: 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
        padding: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .steps-row {
        grid-template-columns: 1fr;
      }
    }