:root {
      --primary: #4F46E5;
      --primary-light: #EEF2FF;
      --secondary: #06B6D4;
      --accent: #F43F5E;
      --warning: #F59E0B;
      --success: #10B981;
      --dark: #0F172A;
      --gray-800: #1E293B;
      --gray-700: #334155;
      --gray-600: #475569;
      --gray-400: #94A3B8;
      --gray-200: #E2E8F0;
      --gray-100: #F1F5F9;
      --light: #F8FAFC;
      --white: #FFFFFF;
      --gradient-vivid: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #EC4899 100%);
      --gradient-card: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
      --shadow-md: 0 4px 14px rgba(79,70,229,0.08), 0 2px 6px rgba(0,0,0,0.04);
      --shadow-lg: 0 10px 25px -5px rgba(79,70,229,0.12), 0 8px 10px -6px rgba(0,0,0,0.04);
      --shadow-hover: 0 20px 30px -10px rgba(79,70,229,0.22);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.28s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--light);
      color: var(--gray-800);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    }

    body {
      overflow-x: hidden;
      line-height: 1.6;
      background: radial-gradient(circle at 10% 10%, #EEF2FF 0%, transparent 40%),
                  radial-gradient(circle at 90% 40%, #FCE7F3 0%, transparent 45%),
                  #F8FAFC;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--gray-200);
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-logo-box {
      max-width: 150px;
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      font-size: 15px;
      font-weight: 600;
      color: var(--gray-700);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      font-size: 14px;
    }

    .btn-primary {
      background: var(--gradient-vivid);
      color: var(--white);
      box-shadow: 0 4px 14px rgba(236,72,153,0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(79,70,229,0.35);
      color: var(--white);
    }

    .btn-outline {
      background: var(--white);
      border-color: var(--gray-200);
      color: var(--gray-800);
    }

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

    .mobile-menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 4px;
    }

    .mobile-menu-toggle span {
      width: 24px;
      height: 2px;
      background-color: var(--dark);
      transition: var(--transition);
    }

    /* 区域通用规范 */
    .section-spacing {
      padding: 80px 0;
    }

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

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background: #EDE9FE;
      color: #6D28D9;
      font-weight: 700;
      font-size: 13px;
      border-radius: 30px;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 16px;
      color: var(--gray-600);
    }

    /* 首屏 Hero (无图片，艳彩纯CSS与卡片) */
    .hero-section {
      padding: 90px 0 70px;
      position: relative;
    }

    .hero-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--dark);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-h1 span {
      background: var(--gradient-vivid);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-intro {
      font-size: 18px;
      color: var(--gray-700);
      max-width: 820px;
      line-height: 1.7;
      margin-bottom: 32px;
    }

    .hero-cta-box {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
      margin-bottom: 45px;
    }

    .btn-hero-official {
      background: linear-gradient(90deg, #F43F5E, #7C3AED);
      color: var(--white);
      padding: 14px 34px;
      font-size: 16px;
      border-radius: 30px;
      box-shadow: 0 10px 20px rgba(244, 63, 94, 0.35);
      font-weight: 700;
    }

    .btn-hero-official:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 26px rgba(244, 63, 94, 0.45);
      color: var(--white);
    }

    .hero-stats-panel {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
      background: var(--white);
      padding: 28px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--gray-200);
      box-shadow: var(--shadow-md);
    }

    .stat-card {
      text-align: center;
      padding: 10px;
    }

    .stat-value {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--gray-600);
      font-weight: 500;
    }

    /* 平台核心能力网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--white);
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--gray-200);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: #C7D2FE;
    }

    .service-icon-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 48px;
      height: 48px;
      border-radius: 12px;
      margin-bottom: 18px;
      font-size: 20px;
      background: var(--primary-light);
      color: var(--primary);
    }

    .service-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
    }

    .service-desc {
      font-size: 14px;
      color: var(--gray-600);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .service-features-list {
      border-top: 1px solid var(--gray-100);
      padding-top: 14px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .service-features-list li {
      font-size: 13px;
      color: var(--gray-700);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .service-features-list li::before {
      content: "●";
      color: var(--secondary);
      font-size: 10px;
    }

    /* 行业方案与图文 */
    .content-media-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 50px;
      background: var(--white);
      padding: 36px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--gray-200);
      box-shadow: var(--shadow-sm);
    }

    .content-media-block.reverse {
      grid-template-columns: 1fr 1fr;
    }

    .media-holder {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      background: var(--gray-100);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-holder img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-holder:hover img {
      transform: scale(1.02);
    }

    .content-text h3 {
      font-size: 24px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 14px;
    }

    .content-text p {
      font-size: 15px;
      color: var(--gray-600);
      margin-bottom: 20px;
      line-height: 1.7;
    }

    /* 支持模型标签云 */
    .model-tags-container {
      background: var(--white);
      padding: 30px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--gray-200);
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
    }

    .model-chip {
      padding: 8px 18px;
      background: var(--gray-100);
      color: var(--gray-800);
      font-weight: 600;
      font-size: 14px;
      border-radius: 20px;
      border: 1px solid var(--gray-200);
      transition: var(--transition);
    }

    .model-chip:hover {
      background: var(--primary);
      color: var(--white);
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* 对比评测卡片与表格 */
    .eval-overview-card {
      background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%);
      color: var(--white);
      border-radius: var(--radius-lg);
      padding: 40px;
      margin-bottom: 30px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 24px;
    }

    .eval-score-box {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }

    .eval-big-score {
      font-size: 54px;
      font-weight: 900;
      color: #38BDF8;
      line-height: 1;
    }

    .eval-full-mark {
      font-size: 20px;
      color: #94A3B8;
    }

    .eval-stars {
      color: #FBBF24;
      font-size: 22px;
      letter-spacing: 2px;
    }

    .eval-table-wrap {
      background: var(--white);
      border-radius: var(--radius-md);
      border: 1px solid var(--gray-200);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

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

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      font-size: 14px;
      border-bottom: 1px solid var(--gray-200);
    }

    .eval-table th {
      background: #F8FAFC;
      color: var(--gray-700);
      font-weight: 700;
    }

    .eval-table tr:hover td {
      background: #F1F5F9;
    }

    .eval-highlight {
      font-weight: 700;
      color: var(--primary);
    }

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

    .flow-step-item {
      background: var(--white);
      padding: 26px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--gray-200);
      position: relative;
      text-align: center;
    }

    .step-number-badge {
      display: inline-flex;
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: var(--white);
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .step-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--dark);
    }

    .step-desc {
      font-size: 13px;
      color: var(--gray-600);
      line-height: 1.5;
    }

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

    .review-card {
      background: var(--white);
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--gray-200);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: var(--gray-700);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--gray-100);
      padding-top: 14px;
    }

    .review-avatar-char {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }

    .review-user-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark);
    }

    .review-user-role {
      font-size: 12px;
      color: var(--gray-400);
    }

    /* FAQ 手风琴 */
    .faq-accordion-box {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--white);
      border: 1px solid var(--gray-200);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 700;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question::after {
      content: "+";
      font-size: 20px;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-question::after {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #F8FAFC;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 22px;
      border-top: 1px solid var(--gray-200);
    }

    .faq-answer p {
      font-size: 14px;
      color: var(--gray-600);
      line-height: 1.6;
    }

    /* 需求表单与联系我们 */
    .contact-form-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: var(--white);
      padding: 40px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--gray-200);
      box-shadow: var(--shadow-md);
    }

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

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

    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: var(--gray-700);
    }

    .contact-badge-label {
      font-weight: 700;
      color: var(--dark);
      width: 80px;
    }

    .qr-box-wrap {
      margin-top: 16px;
      display: inline-block;
      padding: 10px;
      background: var(--gray-100);
      border-radius: var(--radius-sm);
      border: 1px solid var(--gray-200);
      width: 140px;
      text-align: center;
    }

    .qr-box-wrap img {
      width: 100%;
      height: auto;
      display: block;
    }

    .qr-box-wrap span {
      display: block;
      font-size: 12px;
      margin-top: 6px;
      color: var(--gray-600);
    }

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

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

    .form-group label {
      font-size: 13px;
      font-weight: 600;
      color: var(--gray-700);
    }

    .form-control {
      padding: 12px 14px;
      border: 1px solid var(--gray-200);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: var(--transition);
      background: #FDFDFD;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
    }

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

    /* 资讯与友情链接 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 14px;
      margin-bottom: 30px;
    }

    .article-link-card {
      background: var(--white);
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--gray-200);
      font-size: 13px;
      color: var(--gray-700);
      display: block;
      text-align: center;
      transition: var(--transition);
    }

    .article-link-card:hover {
      background: var(--primary-light);
      color: var(--primary);
      border-color: var(--primary);
    }

    .friendly-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
      padding-top: 14px;
      border-top: 1px solid var(--gray-200);
    }

    .friendly-links-flex a {
      font-size: 13px;
      color: var(--gray-600);
    }

    .friendly-links-flex a:hover {
      color: var(--primary);
      text-decoration: underline;
    }

    /* 页脚 */
    .site-footer {
      background: var(--dark);
      color: var(--gray-400);
      padding: 50px 0 30px;
      border-top: 1px solid var(--gray-800);
    }

    .footer-content-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      border-bottom: 1px solid var(--gray-800);
      padding-bottom: 24px;
      margin-bottom: 24px;
    }

    .footer-brand {
      color: var(--white);
      font-size: 18px;
      font-weight: 800;
    }

    .footer-copy {
      font-size: 13px;
      color: var(--gray-400);
      text-align: center;
    }

    /* 悬浮客服挂件 */
    .floating-support-bubble {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-item-btn {
      width: 50px;
      height: 50px;
      background: var(--white);
      border-radius: 50%;
      box-shadow: 0 4px 16px rgba(0,0,0,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      border: 1px solid var(--gray-200);
      color: var(--primary);
      font-weight: 800;
      font-size: 13px;
      transition: var(--transition);
      position: relative;
    }

    .float-item-btn:hover {
      background: var(--primary);
      color: var(--white);
      transform: scale(1.05);
    }

    .float-popover {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: var(--white);
      padding: 12px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--gray-200);
      width: 140px;
      text-align: center;
    }

    .float-popover img {
      width: 100%;
      height: auto;
      display: block;
    }

    .float-item-btn:hover .float-popover {
      display: block;
    }

    /* 移动端响应式处理 */
    @media (max-width: 1024px) {
      .services-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-panel {
        grid-template-columns: repeat(2, 1fr);
      }
      .article-links-grid {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: flex;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .nav-links li a {
        display: block;
        padding: 12px 0;
      }
      .hero-h1 {
        font-size: 30px;
      }
      .services-grid, .reviews-grid, .flow-steps-grid, .contact-form-layout, .content-media-block {
        grid-template-columns: 1fr;
      }
      .hero-stats-panel {
        grid-template-columns: 1fr;
      }
      .article-links-grid {
        grid-template-columns: 1fr 1fr;
      }
      .header-action-group .btn-outline {
        display: none;
      }
    }