/* roulang page: index */
:root {
      --primary: #0C4A60;
      --primary-light: #145D77;
      --accent: #00A896;
      --accent-hover: #028074;
      --bg-main: #F7FAFC;
      --bg-surface: #FFFFFF;
      --bg-dark: #072227;
      --bg-dark-card: #0F323A;
      --text-heading: #1A202C;
      --text-body: #4A5568;
      --text-muted: #718096;
      --border: #E2E8F0;
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-card: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
      --container-max: 1200px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      font-size: 15px;
      line-height: 1.75;
      color: var(--text-body);
      background-color: var(--bg-main);
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease;
    }

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部通栏 */
    .topbar {
      background-color: #F1F5F9;
      border-bottom: 1px solid var(--border);
      font-size: 12px;
      color: var(--text-muted);
      padding: 6px 0;
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .topbar-info {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .topbar-domain {
      font-weight: 600;
      color: var(--primary);
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background-color: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
      border-bottom: 1px solid var(--border);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .brand-logo {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.3px;
    }
    .brand-logo span {
      display: inline-block;
      width: 10px;
      height: 10px;
      background-color: var(--accent);
      border-radius: 50%;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 24px;
    }
    .nav-link {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-body);
      padding: 6px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent);
    }
    .nav-cta-btn {
      background-color: var(--primary);
      color: #fff;
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      transition: background-color 0.2s ease;
      min-height: 40px;
      display: inline-flex;
      align-items: center;
    }
    .nav-cta-btn:hover {
      background-color: var(--primary-light);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text-heading);
      margin: 5px 0;
    }

    /* 按钮基础 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.25s ease;
      min-height: 44px;
      border: 1px solid transparent;
      text-align: center;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
    }
    .btn-primary:hover {
      background-color: var(--primary-light);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
      border-color: var(--accent);
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
    }
    .btn-outline {
      background-color: transparent;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background-color: #EDF2F7;
    }

    /* 模块通用 */
    .section {
      padding: 80px 0;
    }
    .section-alt {
      background-color: #FFFFFF;
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: #E2E8F0;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--accent);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-heading);
      line-height: 1.35;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-body);
      max-width: 800px;
      text-align: justify;
    }
    .section-dark .section-desc {
      color: #A0AEC0;
    }

    /* 1. 全宽矮横幅 Hero */
    .hero-banner {
      background: linear-gradient(rgba(12, 74, 96, 0.9), rgba(7, 34, 39, 0.92)), url('/assets/images/13209a6a010f7b83.webp') center/cover no-serif;
      padding: 72px 0 64px 0;
      color: #FFFFFF;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.75fr;
      gap: 40px;
      align-items: center;
    }
    .hero-title {
      font-size: 38px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 18px;
      color: #FFFFFF;
      letter-spacing: -0.6px;
    }
    .hero-text {
      font-size: 15px;
      line-height: 1.8;
      color: #E2E8F0;
      margin-bottom: 30px;
      text-align: justify;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-quick-data {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 24px;
      backdrop-filter: blur(4px);
    }
    .quick-stat-item {
      padding: 12px 0;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.15);
    }
    .quick-stat-item:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .quick-stat-label {
      font-size: 13px;
      color: #CBD5E0;
    }
    .quick-stat-value {
      font-size: 20px;
      font-weight: 700;
      color: var(--accent);
      margin-top: 2px;
    }

    /* 2. 卖点三连 */
    .trio-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .trio-card {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-card);
      transition: transform 0.25s ease, border-color 0.25s ease;
    }
    .trio-card:hover {
      transform: translateY(-4px);
      border-color: var(--accent);
    }
    .trio-badge {
      display: inline-block;
      background: #E6FFFA;
      color: var(--accent);
      font-weight: 700;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      margin-bottom: 18px;
    }
    .trio-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 12px;
    }
    .trio-desc {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      text-align: justify;
    }

    /* 3. 研发服务入口矩阵 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: left;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .matrix-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-card);
    }
    .matrix-num {
      font-size: 14px;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 10px;
    }
    .matrix-name {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 8px;
    }
    .matrix-detail {
      font-size: 13px;
      color: var(--text-body);
      line-height: 1.6;
      text-align: justify;
    }

    /* 4. 最新发布：技术前沿与规范 */
    .release-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .release-img {
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .release-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .release-item {
      border-left: 3px solid var(--accent);
      padding-left: 18px;
    }
    .release-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 4px;
    }
    .release-item-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 6px;
    }
    .release-item-text {
      font-size: 13px;
      color: var(--text-body);
      line-height: 1.6;
      text-align: justify;
    }

    /* 5. 热门专题：三大核心疾病管线攻坚 */
    .topic-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .topic-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .topic-img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .topic-body {
      padding: 24px;
    }
    .topic-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 10px;
    }
    .topic-desc {
      font-size: 13.5px;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 18px;
      text-align: justify;
    }
    .topic-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-top: 1px solid var(--border);
      padding-top: 14px;
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 6. 技术资讯列表与白皮书摘要 */
    .article-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .article-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-type {
      font-size: 11px;
      color: var(--primary);
      background: #EDF2F7;
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      align-self: flex-start;
      margin-bottom: 12px;
      font-weight: 600;
    }
    .article-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .article-summary {
      font-size: 13px;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 16px;
      text-align: justify;
    }
    .article-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 7. 硬核数据与指标条 */
    .metric-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: var(--bg-dark-card);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 40px 32px;
      text-align: center;
    }
    .metric-value {
      font-size: 38px;
      font-weight: 800;
      color: var(--accent);
      letter-spacing: -1px;
      margin-bottom: 6px;
      font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
    }
    .metric-label {
      font-size: 14px;
      color: #E2E8F0;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 12px;
      color: #A0AEC0;
    }

    /* 8. 真实研发案例深度叙事 */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-card);
    }
    .case-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      background: #E2E8F0;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      display: inline-block;
      margin-bottom: 14px;
    }
    .case-heading {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 14px;
    }
    .case-block {
      margin-bottom: 12px;
    }
    .case-label {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-heading);
    }
    .case-desc {
      font-size: 13.5px;
      color: var(--text-body);
      line-height: 1.65;
      text-align: justify;
    }

    /* 9. 口碑与同行评审墙 */
    .feedback-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feedback-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }
    .feedback-quote {
      font-size: 13.5px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
      text-align: justify;
    }
    .feedback-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
    }
    .feedback-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 14px;
    }
    .feedback-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-heading);
    }
    .feedback-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 10. 质控合规与数据完整性保障体系 */
    .qa-box {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 36px;
    }
    .qa-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 24px;
    }
    .qa-col {
      border-left: 2px solid #E2E8F0;
      padding-left: 18px;
    }
    .qa-col-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .qa-col-desc {
      font-size: 13.5px;
      color: var(--text-body);
      line-height: 1.65;
      text-align: justify;
    }

    /* 11. 专业疑问拆解 FAQ 手风琴 */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .faq-item summary {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-heading);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      outline: none;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--accent);
      transition: transform 0.2s;
    }
    .faq-item[open] summary::after {
      content: "-";
    }
    .faq-content {
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.75;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
      text-align: justify;
    }

    /* 12. 研发立项咨询与收口表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-card);
    }
    .contact-meta {
      padding-right: 20px;
      border-right: 1px solid var(--border);
    }
    .contact-title {
      font-size: 24px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 12px;
    }
    .contact-text {
      font-size: 14px;
      color: var(--text-body);
      margin-bottom: 24px;
      text-align: justify;
    }
    .assurance-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 20px;
    }
    .assurance-points li {
      font-size: 13px;
      color: var(--text-body);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .assurance-points li::before {
      content: "✓";
      color: var(--accent);
      font-weight: bold;
    }
    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-heading);
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--accent);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    /* 底部固定咨询条 */
    .float-bar {
      position: fixed;
      bottom: 20px;
      right: 24px;
      z-index: 998;
      box-shadow: var(--shadow-lg);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .float-btn {
      background: var(--accent);
      color: #FFFFFF;
      padding: 12px 24px;
      font-size: 14px;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 8px;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(0, 168, 150, 0.35);
    }
    .float-btn:hover {
      background: var(--accent-hover);
    }

    /* 页脚 */
    .site-footer {
      background: var(--bg-dark);
      color: #A0AEC0;
      padding: 60px 0 28px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-title {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-text {
      line-height: 1.7;
      margin-bottom: 16px;
      text-align: justify;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 12px;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .trio-grid, .matrix-grid, .topic-grid, .article-grid, .feedback-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .matrix-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .topbar {
        display: none;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-card);
      }
      .nav-menu.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .trio-grid, .matrix-grid, .topic-grid, .article-list, .feedback-grid, .case-grid, .release-layout, .qa-grid {
        grid-template-columns: 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .contact-meta {
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding-bottom: 24px;
        padding-right: 0;
      }
      .metric-bar {
        grid-template-columns: 1fr;
      }
      .float-bar {
        left: 16px;
        right: 16px;
        bottom: 12px;
      }
      .float-btn {
        width: 100%;
        justify-content: center;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }