:root {
      --c-bg: #fdfdfd;
      --c-card: #ffffff;
      --c-text-main: #19202c;
      --c-text-muted: #4e5d78;
      --c-primary: #3b82f6;
      --c-secondary: #8b5cf6;
      --c-accent-pink: #ec4899;
      --c-accent-amber: #f59e0b;
      --c-accent-teal: #10b981;
      --c-border: #e2e8f0;
      --rainbow-linear: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 25%, #ec4899 50%, #f59e0b 75%, #10b981 100%);
      --rainbow-soft: linear-gradient(135deg, rgba(59,130,246,0.06), rgba(139,92,246,0.06), rgba(236,72,153,0.06));
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: #f8fafc;
      background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.07) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(236, 72, 153, 0.07) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(139, 92, 246, 0.05) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.06) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--c-text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--c-border);
      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;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* 满足页面CSS .nav-links的gap属性设置为0 */
      list-style: none;
    }
    .nav-links li a {
      display: block;
      padding: 10px 16px;
      font-size: 15px;
      font-weight: 500;
      color: var(--c-text-main);
      border-radius: var(--radius-sm);
      position: relative;
    }
    .nav-links li a:hover {
      color: var(--c-primary);
      background: rgba(59, 130, 246, 0.08);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-nav-primary {
      background: var(--rainbow-linear);
      color: #fff !important;
      font-size: 14px;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: 99px;
      box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
      display: inline-block;
    }
    .btn-nav-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(139, 92, 246, 0.4);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--c-border);
      padding: 8px;
      border-radius: 6px;
      cursor: pointer;
    }

    /* 区域通用样式 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 52px;
    }
    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 99px;
      background: #eff6ff;
      border: 1px solid #bfdbfe;
      color: var(--c-primary);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--c-text-main);
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--c-text-muted);
      line-height: 1.6;
    }

    /* 首屏 Hero (无图片) */
    .hero-section {
      padding: 90px 0 80px;
      text-align: center;
      background: radial-gradient(circle at 50% 20%, rgba(59, 130, 246, 0.12) 0%, rgba(236, 72, 153, 0.05) 45%, transparent 70%);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      box-shadow: var(--shadow-sm);
      border-radius: 99px;
      font-size: 14px;
      font-weight: 600;
      color: #2563eb;
      margin-bottom: 24px;
    }
    .hero-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      display: inline-block;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
    }
    .hero-title {
      font-size: 44px;
      font-weight: 800;
      color: #0f172a;
      letter-spacing: -0.5px;
      line-height: 1.25;
      margin-bottom: 20px;
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-desc {
      font-size: 18px;
      color: #475569;
      max-width: 800px;
      margin: 0 auto 36px;
      line-height: 1.65;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-hero-primary {
      background: var(--rainbow-linear);
      color: #ffffff !important;
      font-size: 17px;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: 99px;
      box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-hero-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(139, 92, 246, 0.45);
    }
    .btn-hero-secondary {
      background: #ffffff;
      color: #1e293b;
      font-size: 16px;
      font-weight: 600;
      padding: 13px 30px;
      border-radius: 99px;
      border: 1px solid #cbd5e1;
      box-shadow: var(--shadow-sm);
    }
    .btn-hero-secondary:hover {
      background: #f8fafc;
      border-color: #94a3b8;
    }

    /* 首屏数据指标卡 */
    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1040px;
      margin: 0 auto;
    }
    .metric-card {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 24px 18px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .metric-card::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--rainbow-linear);
    }
    .metric-val {
      font-size: 32px;
      font-weight: 800;
      color: #0f172a;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 14px;
      color: var(--c-text-muted);
    }

    /* 模型矩阵徽章云 */
    .model-pills-wrap {
      margin-top: 40px;
      padding-top: 30px;
      border-top: 1px dashed #cbd5e1;
    }
    .model-pills-title {
      font-size: 13px;
      font-weight: 700;
      color: #64748b;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }
    .model-tags-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 980px;
      margin: 0 auto;
    }
    .model-tag {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      padding: 5px 14px;
      border-radius: 99px;
      font-size: 13px;
      font-weight: 500;
      color: #334155;
      transition: all 0.2s ease;
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
    }
    .model-tag:hover {
      border-color: var(--c-primary);
      color: var(--c-primary);
      transform: translateY(-2px);
    }

    /* 关于与平台介绍 */
    .about-box {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .about-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 36px;
    }
    .about-item {
      padding: 24px;
      background: #f8fafc;
      border-radius: var(--radius-md);
      border-left: 4px solid var(--c-primary);
    }
    .about-item:nth-child(2) { border-left-color: var(--c-secondary); }
    .about-item:nth-child(3) { border-left-color: var(--c-accent-pink); }
    .about-item:nth-child(4) { border-left-color: var(--c-accent-amber); }
    .about-item:nth-child(5) { border-left-color: var(--c-accent-teal); }
    .about-item:nth-child(6) { border-left-color: var(--c-primary); }
    .about-item h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #0f172a;
    }
    .about-item p {
      font-size: 14px;
      color: #475569;
      line-height: 1.6;
    }

    /* 服务卡片网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }
    .service-badge {
      align-self: flex-start;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 6px;
      background: #e0f2fe;
      color: #0369a1;
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 12px;
    }
    .service-card p {
      font-size: 14px;
      color: #475569;
      flex-grow: 1;
      line-height: 1.6;
    }

    /* 流程步骤 */
    .steps-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .step-num {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--rainbow-linear);
      color: #fff;
      font-size: 18px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }
    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 14px;
      color: var(--c-text-muted);
    }

    /* 对比评测卡片与表格 */
    .benchmark-wrap {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }
    .benchmark-highlight-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      background: linear-gradient(135deg, #1e293b, #0f172a);
      color: #ffffff;
      padding: 24px 32px;
      border-radius: var(--radius-md);
      margin-bottom: 32px;
    }
    .score-box {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }
    .score-main {
      font-size: 42px;
      font-weight: 900;
      color: #38bdf8;
    }
    .score-max {
      font-size: 20px;
      color: #94a3b8;
    }
    .star-rating {
      color: #f59e0b;
      font-size: 22px;
      letter-spacing: 3px;
    }
    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }
    .benchmark-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .benchmark-table th, .benchmark-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--c-border);
    }
    .benchmark-table th {
      background: #f8fafc;
      font-weight: 700;
      color: #334155;
    }
    .benchmark-table td.col-brand {
      font-weight: 700;
      color: #2563eb;
      background: rgba(59, 130, 246, 0.03);
    }

    /* 案例展示 */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .showcase-card {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .showcase-img-wrap {
      width: 100%;
      background: #e2e8f0;
      overflow: hidden;
    }
    .showcase-body {
      padding: 20px;
    }
    .showcase-body h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #0f172a;
    }
    .showcase-body p {
      font-size: 14px;
      color: #475569;
    }

    /* 宣传图画廊 */
    .banner-gallery-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 32px;
    }
    .banner-gallery-item {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-sm);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .review-stars {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 15px;
    }
    .review-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.7;
      flex-grow: 1;
      margin-bottom: 20px;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }
    .review-avatar-char {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #eff6ff;
      color: #2563eb;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid #bfdbfe;
    }
    .review-author h4 {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
    }
    .review-author span {
      font-size: 12px;
      color: #64748b;
    }

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 600;
      color: #0f172a;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-question:hover {
      color: var(--c-primary);
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.25s ease;
      font-weight: bold;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 14px;
      color: #475569;
      line-height: 1.7;
      border-top: 1px solid #f8fafc;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 需求匹配表单 */
    .form-box {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 44px;
      box-shadow: var(--shadow-md);
      max-width: 820px;
      margin: 0 auto;
    }
    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 20px;
    }
    .form-group-full {
      grid-column: span 2;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: #334155;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s ease;
      background: #f8fafc;
      color: var(--c-text-main);
    }
    .form-control:focus {
      border-color: var(--c-primary);
      background: #fff;
    }
    .btn-submit {
      width: 100%;
      background: var(--rainbow-linear);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      padding: 14px;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
      transition: transform 0.2s ease;
    }
    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
    }

    /* 资讯与友情链接 */
    .article-links-box {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 28px;
    }
    .article-links-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #0f172a;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .article-link-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      list-style: none;
    }
    .article-link-list li a {
      font-size: 14px;
      color: #3b82f6;
      background: #eff6ff;
      padding: 6px 14px;
      border-radius: 6px;
      border: 1px solid #dbeafe;
    }
    .article-link-list li a:hover {
      background: #2563eb;
      color: #ffffff;
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--c-border);
      padding: 60px 0 30px;
      color: #475569;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 18px;
    }
    .footer-links-list {
      list-style: none;
    }
    .footer-links-list li {
      margin-bottom: 10px;
    }
    .footer-links-list a {
      font-size: 14px;
      color: #64748b;
    }
    .footer-links-list a:hover {
      color: var(--c-primary);
    }
    .footer-contact-item {
      font-size: 14px;
      margin-bottom: 8px;
      color: #475569;
    }
    .footer-qr-wrap {
      max-width: 110px;
      border: 1px solid var(--c-border);
      border-radius: 8px;
      overflow: hidden;
      margin-top: 10px;
    }
    .footer-bottom {
      border-top: 1px solid #f1f5f9;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #94a3b8;
    }
    .friend-links-bar {
      margin-bottom: 16px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
    }
    .friend-links-bar a {
      color: #64748b;
      font-size: 13px;
    }
    .friend-links-bar a:hover {
      color: var(--c-primary);
    }

    /* 浮动操作条 */
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      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(--c-border);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 700;
      color: #1e293b;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .float-btn:hover {
      background: var(--c-primary);
      color: #fff;
    }

    /* 响应式媒体查询 */
    @media (max-width: 992px) {
      .services-grid, .about-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .banner-gallery-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-links {
        display: none;
      }
      .nav-links.mobile-active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--c-border);
        box-shadow: var(--shadow-md);
        padding: 16px 0;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 32px;
      }
    }

    @media (max-width: 640px) {
      .services-grid, .about-grid, .reviews-grid, .showcase-grid, .hero-metrics-grid, .steps-row, .banner-gallery-row {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 26px;
      }
    }