:root {
      --primary-cyan: #0d9488;
      --primary-cyan-dark: #0f766e;
      --primary-cyan-light: #ccfbf1;
      --secondary-teal: #0284c7;
      --accent-gradient: linear-gradient(135deg, #0d9488 0%, #0284c7 100%);
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --bg-subtle: #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 12px rgba(13,148,136,0.08);
      --shadow-lg: 0 12px 28px rgba(13,148,136,0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --transition: all 0.25s ease-in-out;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "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 {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

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

    /* 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);
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-logo-wrap {
      max-width: 160px;
      display: flex;
      align-items: center;
    }

    .brand-logo-wrap img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-cyan-dark);
      background-color: var(--primary-cyan-light);
    }

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

    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 18px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      color: #ffffff;
      background: var(--accent-gradient);
      box-shadow: 0 2px 8px rgba(13, 148, 136, 0.25);
      transition: var(--transition);
    }

    .btn-portal:hover {
      opacity: 0.92;
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(13, 148, 136, 0.35);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .menu-toggle svg {
      width: 24px;
      height: 24px;
      fill: var(--text-main);
    }

    /* 首屏 Hero (无图片，纯科技渐变与数据卡片) */
    .hero-section {
      background: linear-gradient(180deg, #f0fdfa 0%, #f8fafc 100%);
      padding: 64px 0 56px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      align-items: center;
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary-cyan-dark);
      background: #e6fffa;
      border: 1px solid #99f6e4;
      border-radius: 20px;
      margin-bottom: 16px;
    }

    .hero-title {
      font-size: 2.35rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 1.08rem;
      color: var(--text-muted);
      margin-bottom: 28px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      margin-bottom: 32px;
    }

    .btn-main-action {
      padding: 13px 26px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #ffffff;
      background: var(--accent-gradient);
      border-radius: var(--radius-md);
      box-shadow: 0 4px 14px rgba(13, 148, 136, 0.3);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .btn-main-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(13, 148, 136, 0.4);
    }

    .btn-secondary-action {
      padding: 12px 24px;
      font-size: 1.02rem;
      font-weight: 600;
      color: var(--primary-cyan-dark);
      background: #ffffff;
      border: 1px solid #99f6e4;
      border-radius: var(--radius-md);
    }

    .btn-secondary-action:hover {
      background: var(--primary-cyan-light);
    }

    .hero-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .hero-tag {
      font-size: 0.8rem;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 4px 10px;
      border-radius: 4px;
      color: var(--text-light);
    }

    /* 首屏数据指标卡片 */
    .hero-stats-panel {
      background: #ffffff;
      border: 1px solid #ccfbf1;
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .stat-box {
      padding: 16px;
      background: #f8fafc;
      border: 1px solid #f1f5f9;
      border-radius: var(--radius-md);
      border-left: 4px solid var(--primary-cyan);
    }

    .stat-num {
      font-size: 1.7rem;
      font-weight: 800;
      color: var(--primary-cyan-dark);
      display: block;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用Section */
    .section-wrap {
      padding: 64px 0;
      border-bottom: 1px solid var(--border-color);
      background: #ffffff;
    }

    .section-wrap.alt-bg {
      background: #fcfdfd;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 44px;
    }

    .section-subtitle {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary-cyan);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 1.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 网格与卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #99f6e4;
    }

    .feature-card-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .card-icon-pill {
      width: 42px;
      height: 42px;
      background: var(--primary-cyan-light);
      color: var(--primary-cyan-dark);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
      flex-shrink: 0;
    }

    .feature-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-tag-row {
      margin-top: 14px;
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .sub-tag {
      font-size: 0.75rem;
      padding: 2px 8px;
      background: #f1f5f9;
      border-radius: 4px;
      color: var(--text-light);
    }

    /* 平台支持模型跑马灯/展示网格 */
    .models-badge-wall {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      padding: 20px;
      background: #f8fafc;
      border-radius: var(--radius-lg);
      border: 1px dashed #cbd5e1;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 14px;
      border-radius: 20px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 1px 2px rgba(0,0,0,0.03);
      transition: var(--transition);
    }

    .model-chip:hover {
      border-color: var(--primary-cyan);
      color: var(--primary-cyan-dark);
      background: var(--primary-cyan-light);
    }

    /* 对比评测专属板块 */
    .review-score-panel {
      background: linear-gradient(135deg, #0f766e 0%, #0369a1 100%);
      border-radius: var(--radius-lg);
      padding: 36px;
      color: #ffffff;
      margin-bottom: 32px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .score-main-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-giant-number {
      font-size: 3.8rem;
      font-weight: 900;
      line-height: 1;
      color: #5eead4;
    }

    .score-detail h3 {
      font-size: 1.4rem;
      margin-bottom: 6px;
    }

    .score-stars {
      color: #fde047;
      font-size: 1.25rem;
      margin-bottom: 4px;
    }

    .score-highlight-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      max-width: 540px;
    }

    .score-highlight-item {
      font-size: 0.9rem;
      background: rgba(255, 255, 255, 0.12);
      padding: 8px 12px;
      border-radius: 6px;
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    /* 对比表格 */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.94rem;
    }

    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .compare-table td.highlight-col {
      background: #f0fdfa;
      font-weight: 600;
      color: var(--primary-cyan-dark);
    }

    /* 流程步骤 */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      position: relative;
    }

    .step-badge {
      font-size: 0.8rem;
      font-weight: 800;
      color: var(--primary-cyan);
      background: #e6fffa;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }

    .step-card h4 {
      font-size: 1.05rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 案例展示区（带图） */
    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .case-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .case-media {
      width: 100%;
      background: #f1f5f9;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-media.square {
      aspect-ratio: 1 / 1;
    }

    .case-media img {
      max-width: 100%;
      height: auto;
      object-fit: contain;
      display: block;
    }

    .case-body {
      padding: 18px;
    }

    .case-body h4 {
      font-size: 1.05rem;
      margin-bottom: 6px;
    }

    .case-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 客户评论卡片 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-item {
      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-quote {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
      font-style: normal;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

    .author-avatar-badge {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-cyan-light);
      color: var(--primary-cyan-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
    }

    .author-info h5 {
      font-size: 0.9rem;
      color: var(--text-main);
    }

    .author-info span {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      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: var(--transition);
    }

    .faq-item.active {
      border-color: #99f6e4;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 16px 20px;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: #ffffff;
    }

    .faq-icon-cross {
      font-size: 1.2rem;
      color: var(--primary-cyan);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      display: none;
      padding: 0 20px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      border-top: 1px solid #f8fafc;
    }

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

    /* 表单与联络网格 */
    .contact-form-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 11px 14px;
      font-size: 0.92rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: var(--transition);
      background: #f8fafc;
      color: var(--text-main);
    }

    .form-control:focus {
      border-color: var(--border-focus);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
    }

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

    .contact-details-box {
      background: #f0fdfa;
      border: 1px solid #ccfbf1;
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-row-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    .contact-row-item strong {
      color: var(--text-main);
      min-width: 80px;
    }

    .qr-container {
      margin-top: 10px;
      text-align: center;
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid #e2e8f0;
      max-width: 200px;
    }

    .qr-container img {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto 8px;
    }

    .qr-container span {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 行业资讯与文章 */
    .article-links-wrap {
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .article-url-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .article-url-list li a {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      color: var(--secondary-teal);
      padding: 8px 12px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
    }

    .article-url-list li a:hover {
      background: var(--primary-cyan-light);
      border-color: #99f6e4;
      color: var(--primary-cyan-dark);
    }

    /* 友情链接与底部 */
    .links-bar {
      padding: 20px 0;
      background: #f1f5f9;
      border-top: 1px solid var(--border-color);
    }

    .links-flex {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
    }

    .links-title {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .links-flex a {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .links-flex a:hover {
      color: var(--primary-cyan);
    }

    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 40px 0 24px;
      font-size: 0.88rem;
      border-top: 1px solid #1e293b;
    }

    .footer-content-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 28px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 14px;
      font-weight: 600;
    }

    .footer-col p {
      line-height: 1.6;
      margin-bottom: 12px;
    }

    .footer-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-nav-list a {
      color: #94a3b8;
    }

    .footer-nav-list a:hover {
      color: #5eead4;
    }

    .footer-bottom-bar {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.82rem;
      color: #64748b;
    }

    /* 浮动客服 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      background: var(--primary-cyan);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      cursor: pointer;
      transition: var(--transition);
      border: none;
    }

    .float-btn:hover {
      background: var(--primary-cyan-dark);
      transform: scale(1.08);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .review-grid {
        grid-template-columns: 1fr;
      }
      .contact-form-grid {
        grid-template-columns: 1fr;
      }
      .footer-content-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 12px;
      }
      .grid-3, .grid-2, .grid-4, .flow-steps-grid, .article-url-list {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-stats-panel {
        grid-template-columns: 1fr;
      }
      .review-score-panel {
        flex-direction: column;
        align-items: flex-start;
      }
    }