:root {
      --bg-main: #f3f8f8;
      --bg-card: #ffffff;
      --bg-alt: #e6f3f2;
      --primary: #008779;
      --primary-light: #00a896;
      --primary-dark: #005f56;
      --primary-gradient: linear-gradient(135deg, #005f56 0%, #008779 50%, #02c39a 100%);
      --accent: #02c39a;
      --accent-soft: rgba(2, 195, 154, 0.12);
      --text-main: #142826;
      --text-muted: #4e6563;
      --text-light: #7b9492;
      --border-color: #d2e5e3;
      --card-shadow: 0 10px 30px rgba(0, 95, 86, 0.06);
      --card-shadow-hover: 0 16px 36px rgba(0, 95, 86, 0.12);
      --container-width: 1200px;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(2, 195, 154, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 135, 121, 0.05) 0%, transparent 40%);
      background-attachment: fixed;
    }

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

    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, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 48px;
    }

    .brand-box img {
      max-height: 42px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: var(--accent-soft);
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(0, 135, 121, 0.25);
    }

    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(0, 135, 121, 0.4);
      transform: translateY(-2px);
      color: #ffffff;
    }

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

    .btn-outline:hover {
      background: var(--accent-soft);
      transform: translateY(-2px);
    }

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

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 50px;
      position: relative;
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: var(--accent-soft);
      border: 1px solid var(--border-color);
      border-radius: 30px;
      color: var(--primary-dark);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3rem);
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

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

    .hero-subtitle {
      font-size: clamp(1rem, 1.8vw, 1.2rem);
      color: var(--text-muted);
      max-width: 820px;
      margin-bottom: 32px;
      line-height: 1.7;
    }

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

    .hero-actions .btn {
      padding: 13px 30px;
      font-size: 1.05rem;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
      margin-top: 10px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 22px 18px;
      border-radius: var(--radius-md);
      box-shadow: var(--card-shadow);
      text-align: center;
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: var(--accent);
    }

    .stat-value {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: inherit;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用 Section 样式 */
    .section {
      padding: 65px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 45px;
    }

    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: inline-block;
    }

    .section-title {
      font-size: clamp(1.6rem, 2.8vw, 2.2rem);
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.35;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模块生态标签云 */
    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 7px 16px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
      transition: var(--transition);
      box-shadow: 0 2px 6px rgba(0,0,0,0.02);
    }

    .model-pill:hover {
      border-color: var(--primary);
      color: var(--primary-dark);
      background: var(--accent-soft);
      transform: translateY(-2px);
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-shadow-hover);
      border-color: var(--primary-light);
    }

    .service-icon {
      width: 46px;
      height: 46px;
      background: var(--accent-soft);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 16px;
      font-size: 1.25rem;
      font-weight: bold;
    }

    .service-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .service-features {
      list-style: none;
      margin-bottom: 16px;
    }

    .service-features li {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 6px;
      position: relative;
      padding-left: 16px;
    }

    .service-features li::before {
      content: "•";
      color: var(--accent);
      position: absolute;
      left: 0;
      font-weight: bold;
      font-size: 1.1rem;
      line-height: 1;
    }

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

    .flow-step {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      box-shadow: var(--card-shadow);
    }

    .step-num {
      width: 34px;
      height: 34px;
      background: var(--primary-gradient);
      color: #fff;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
      margin-bottom: 14px;
    }

    .flow-step h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .flow-step p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 案例图片展示区 */
    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }

    .media-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
    }

    .media-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e2edea;
      overflow: hidden;
    }

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

    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .media-card:hover .media-img-wrap img {
      transform: scale(1.04);
    }

    .media-content {
      padding: 20px;
    }

    .media-content h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .media-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 评测与对比表格 */
    .eval-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--card-shadow);
      margin-bottom: 30px;
    }

    .eval-header-card {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 24px;
    }

    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--bg-alt);
      padding: 12px 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .score-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary-dark);
      line-height: 1;
    }

    .score-meta {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.4;
    }

    .stars {
      color: #f59e0b;
      font-size: 1.1rem;
      letter-spacing: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 620px;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 15px 18px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }

    .comparison-table th {
      background: var(--bg-alt);
      color: var(--text-main);
      font-weight: 700;
    }

    .comparison-table tr:hover td {
      background: rgba(2, 195, 154, 0.04);
    }

    .highlight-cell {
      color: var(--primary-dark);
      font-weight: 700;
      background: rgba(2, 195, 154, 0.06);
    }

    /* 用户评论 */
    .testimonial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .quote-text {
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 40px;
      height: 40px;
      background: var(--accent-soft);
      color: var(--primary);
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
    }

    .reviewer-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-title {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      text-align: left;
      background: none;
      border: none;
      font-size: 1.02rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      transition: var(--transition);
    }

    .faq-question:hover {
      background-color: var(--bg-alt);
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.25rem;
      transition: transform 0.3s ease;
      color: var(--primary);
      font-weight: 400;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #fafdfc;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 0 24px 18px;
    }

    .faq-answer p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 表单与联系模块 */
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 32px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--card-shadow);
    }

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

    .info-group {
      margin-bottom: 24px;
    }

    .info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 14px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .info-label {
      font-weight: 700;
      color: var(--text-main);
      min-width: 80px;
    }

    .qr-box {
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius-md);
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      max-width: 170px;
      text-align: center;
    }

    .qr-box img {
      width: 130px;
      height: 130px;
      object-fit: cover;
      border-radius: 6px;
      margin-bottom: 8px;
    }

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

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

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

    .form-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      font-family: inherit;
      color: var(--text-main);
      background: #fdfefe;
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px var(--accent-soft);
    }

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

    /* 行业资讯与文章 */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .article-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 18px 22px;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      transition: var(--transition);
    }

    .article-item:hover {
      border-color: var(--primary);
      transform: translateX(4px);
    }

    .article-title {
      font-size: 0.98rem;
      font-weight: 600;
      color: var(--text-main);
    }

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

    .article-link {
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 600;
      white-space: nowrap;
    }

    /* 友情链接与页脚 */
    .footer-section {
      background: #0d1e1c;
      color: #9db2af;
      padding: 55px 0 25px;
      border-top: 1px solid #1a3330;
      margin-top: 50px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-col p {
      font-size: 0.88rem;
      line-height: 1.65;
      margin-bottom: 14px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 9px;
    }

    .footer-links li a {
      color: #9db2af;
      font-size: 0.88rem;
    }

    .footer-links li a:hover {
      color: var(--accent);
      padding-left: 4px;
    }

    .friend-links-box {
      border-top: 1px solid #1a3330;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      color: #ffffff;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px 18px;
    }

    .friend-links-list a {
      color: #7b9492;
      font-size: 0.85rem;
    }

    .friend-links-list a:hover {
      color: #02c39a;
    }

    .footer-bottom {
      border-top: 1px solid #162a28;
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: #637b79;
    }

    /* 浮动工具栏 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      cursor: pointer;
      color: var(--primary);
      font-size: 1.1rem;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary);
      color: #fff;
      transform: scale(1.08);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .flow-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .contact-layout { grid-template-columns: 1fr; }
      
      .menu-toggle {
        display: block;
      }

      .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: 0 10px 20px rgba(0,0,0,0.05);
      }

      .nav-links.active {
        display: flex;
      }

      .nav-links li {
        width: 100%;
      }

      .nav-links li a {
        padding: 10px 12px;
      }
    }

    @media (max-width: 640px) {
      .grid-3, .grid-2, .grid-4, .flow-grid, .hero-stats {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-header-card {
        flex-direction: column;
        align-items: flex-start;
      }
      .hero-actions {
        flex-direction: column;
        width: 100%;
      }
      .hero-actions .btn {
        width: 100%;
      }
    }