:root {
      --primary: #0d9488;
      --primary-dark: #0f766e;
      --primary-light: #ccfbf1;
      --primary-gradient: linear-gradient(135deg, #0d9488 0%, #0284c7 100%);
      --accent: #0284c7;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-alt: #f0fdfa;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --border-focus: #14b8a6;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-lg: 0 10px 15px -3px rgba(13,148,136,0.1), 0 4px 6px -4px rgba(13,148,136,0.05);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-main);
      line-height: 1.6;
    }

    body {
      background: linear-gradient(180deg, #f0fdfa 0%, #f8fafc 500px, #f8fafc 100%);
      color: var(--text-main);
      min-width: 320px;
      overflow-x: hidden;
    }

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

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-logo-wrap img {
      max-height: 42px;
      width: auto;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: 0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-header-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 18px;
      font-size: 14px;
      font-weight: 600;
      color: #ffffff;
      background: var(--primary-gradient);
      border-radius: var(--radius-md);
      box-shadow: 0 2px 6px rgba(13, 148, 136, 0.3);
    }
    .btn-header-cta:hover {
      opacity: 0.95;
      transform: translateY(-1px);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      font-size: 18px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 模块通用样式 */
    .section-wrap {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-alt {
      background-color: var(--bg-alt);
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Hero 首屏 (无图片) */
    .hero-section {
      padding: 80px 0 70px 0;
      background: radial-gradient(circle at 50% 0%, #ccfbf1 0%, #f0fdfa 40%, #f8fafc 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .hero-inner {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid #99f6e4;
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-dark);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 40px;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(135deg, #0f766e 0%, #0284c7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }
    .hero-btn-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-main-official {
      padding: 14px 34px;
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      background: var(--primary-gradient);
      border-radius: var(--radius-md);
      box-shadow: 0 6px 18px rgba(13, 148, 136, 0.35);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-main-official:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(13, 148, 136, 0.45);
    }
    .btn-secondary {
      padding: 14px 28px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }
    .btn-secondary:hover {
      background: #f8fafc;
      border-color: #cbd5e1;
      color: var(--primary);
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .stat-item {
      text-align: center;
      padding: 10px;
    }
    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 13px;
      color: var(--text-light);
    }

    /* 平台支持模型标签滚动条 */
    .model-chips-wrap {
      margin-top: 30px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }
    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      font-size: 12px;
      font-weight: 500;
      padding: 4px 12px;
      border-radius: 14px;
    }

    /* 卡片网格布局通用 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .cards-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .cards-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #99f6e4;
    }
    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 流程步骤 */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
    }
    .step-number {
      font-size: 12px;
      font-weight: 800;
      color: var(--primary);
      background: var(--primary-light);
      display: inline-block;
      padding: 2px 8px;
      border-radius: 10px;
      margin-bottom: 12px;
    }
    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .step-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 图文与案例区 */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
      margin-bottom: 40px;
    }
    .media-frame {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      background: #ffffff;
    }
    .media-frame img {
      width: 100%;
      height: auto;
      object-fit: contain;
    }
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .gallery-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .gallery-img-wrap {
      background: #e2e8f0;
      aspect-ratio: 16/9;
      overflow: hidden;
    }
    .gallery-img-wrap.square {
      aspect-ratio: 1/1;
    }
    .gallery-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .gallery-content {
      padding: 16px;
    }
    .gallery-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .gallery-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测板块 */
    .eval-highlight-card {
      background: #ffffff;
      border: 2px solid #99f6e4;
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .eval-score-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .eval-score-num {
      font-size: 48px;
      font-weight: 900;
      color: var(--primary-dark);
      line-height: 1;
    }
    .eval-score-meta {
      font-size: 14px;
      color: var(--text-muted);
    }
    .stars-rate {
      color: #f59e0b;
      font-size: 18px;
      margin-bottom: 4px;
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
      min-width: 600px;
    }
    .comparison-table th, .comparison-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
    }
    .comparison-table th {
      background-color: #f1f5f9;
      color: var(--text-main);
      font-weight: 700;
    }
    .comparison-table tr:last-child td {
      border-bottom: none;
    }
    .comparison-table .highlight-col {
      background-color: #f0fdfa;
      font-weight: 600;
      color: var(--primary-dark);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }
    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }
    .reviewer-avatar {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }
    .reviewer-role {
      font-size: 12px;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.2s ease;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 16px 20px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      background: none;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-question:hover {
      color: var(--primary);
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.25s ease;
      color: var(--text-light);
    }
    .faq-answer {
      display: none;
      padding: 0 20px 16px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px solid #f8fafc;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }

    /* 表单与联系模块 */
    .form-contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: start;
    }
    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }
    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 18px;
      font-size: 14px;
      color: var(--text-main);
    }
    .contact-qr-box {
      margin-top: 20px;
      padding-top: 20px;
      border-top: 1px solid var(--border-color);
      text-align: center;
    }
    .contact-qr-box img {
      max-width: 140px;
      margin: 0 auto 10px auto;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 4px;
      background: #ffffff;
    }
    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: border-color 0.2s ease;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
    }
    .form-textarea {
      resize: vertical;
      min-height: 90px;
    }
    .btn-submit-form {
      width: 100%;
      padding: 12px;
      font-size: 15px;
      font-weight: 700;
      color: #ffffff;
      background: var(--primary-gradient);
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: opacity 0.2s ease, transform 0.2s ease;
    }
    .btn-submit-form:hover {
      opacity: 0.95;
      transform: translateY(-1px);
    }

    /* 资讯与百科 */
    .article-links-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
    }
    .article-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .article-links-list li {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px dashed var(--border-color);
      padding-bottom: 8px;
    }
    .article-links-list li:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .article-links-list a {
      font-size: 14px;
      color: var(--text-muted);
    }
    .article-links-list a:hover {
      color: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background-color: #0f172a;
      color: #cbd5e1;
      padding: 50px 0 24px 0;
      border-top: 1px solid #1e293b;
      font-size: 13px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 36px;
    }
    .footer-title {
      font-size: 15px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 14px;
    }
    .footer-desc {
      color: #94a3b8;
      line-height: 1.6;
      margin-bottom: 16px;
      max-width: 320px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links-list a {
      color: #94a3b8;
    }
    .footer-links-list a:hover {
      color: #38bdf8;
    }
    .footer-friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 8px;
    }
    .footer-friend-links a {
      color: #94a3b8;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
    }
    .footer-friend-links a:hover {
      color: #ffffff;
      background: var(--primary);
    }
    .footer-bottom-bar {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: #64748b;
      font-size: 12px;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 浮动客服入口 */
    .float-kefu-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 10px;
    }
    .kefu-trigger-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(13, 148, 136, 0.4);
      cursor: pointer;
      border: none;
      font-size: 20px;
      transition: transform 0.2s ease;
    }
    .kefu-trigger-btn:hover {
      transform: scale(1.08);
    }
    .kefu-popup-card {
      display: none;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 14px;
      box-shadow: var(--shadow-lg);
      text-align: center;
      width: 170px;
    }
    .kefu-popup-card img {
      width: 120px;
      margin: 0 auto 6px auto;
    }
    .kefu-popup-card p {
      font-size: 12px;
      color: var(--text-main);
      font-weight: 600;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .cards-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-wrapper {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid-3, .cards-grid-4, .cards-grid-2 {
        grid-template-columns: 1fr;
      }
      .steps-wrapper {
        grid-template-columns: 1fr;
      }
      .media-showcase-grid {
        grid-template-columns: 1fr;
      }
      .gallery-grid {
        grid-template-columns: 1fr;
      }
      .form-contact-grid {
        grid-template-columns: 1fr;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-card {
        flex-direction: column;
        align-items: flex-start;
      }
    }