:root {
      --blue: #0477f1;
      --deep-blue: #3c5cb3;
      --ink: #111;
      --soft: #f9fafc;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      min-width: 0;
      overflow-x: hidden;
      background: var(--soft);
      color: var(--ink);
      font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
    }

    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; }

    .site-page {
      position: relative;
      overflow: hidden;
      background: #f9fafc;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    /* site-footer.css 在 >=981px 时给 html 加了 zoom:.9，vh 不会随之缩放，需除回 */
    @media (min-width: 981px) {
      .site-page { min-height: calc(100vh / .9); }
    }

    .site-page > main { flex: 1 0 auto; }
    .site-page > footer { flex: 0 0 auto; }

    .topbar {
      position: fixed;
      inset: 0 0 auto 0;
      z-index: 50;
      height: 100px;
      border-bottom: 1px solid rgba(255, 255, 255, .3);
      background: rgba(5, 15, 38, .58);
      backdrop-filter: blur(10px);
      transition: background .28s ease, border-color .28s ease, box-shadow .28s ease;
    }

    .topbar.is-light {
      border-bottom-color: rgba(26, 56, 120, .08);
      background: rgba(255, 255, 255, .96);
      box-shadow: 0 8px 24px rgba(20, 42, 78, .08);
      backdrop-filter: blur(12px);
    }

    .topbar-inner {
      height: 100%;
      display: flex;
      align-items: center;
      padding: 0 60px;
      gap: 120px;
    }

    .logo-wrap {
      position: relative;
      width: 290px;
      height: 29px;
      flex: 0 0 auto;
    }

    .logo {
      position: absolute;
      inset: 0;
      width: 290px;
      height: 29px;
      object-fit: contain;
      transition: opacity .24s ease;
    }

    .logo-blue { opacity: 0; }
    .topbar.is-light .logo-white { opacity: 0; }
    .topbar.is-light .logo-blue { opacity: 1; }

    .nav {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-left: 8px;
    }

    .nav a,
    .header-links a {
      position: relative;
      color: #fff;
      text-decoration: none;
      transition: color .22s ease, transform .22s ease;
    }

    .topbar.is-light .nav a,
    .topbar.is-light .header-links a { color: #111; }

    .nav a {
      font-size: 24px;
      line-height: 38.4px;
      white-space: nowrap;
    }

    .nav-deepvision { font-weight: 700; }

    .nav a.active { color: var(--blue); }
    .topbar.is-light .nav a.active,
    .topbar.is-light .header-links a:first-child { color: var(--deep-blue); }

    .nav a.active::after {
      content: "";
      position: absolute;
      left: 50%;
      bottom: -31px;
      width: 111px;
      height: 3px;
      background: var(--blue);
      transform: translateX(-50%);
    }

    .topbar.is-light .nav a.active::after {
      bottom: -31px;
      background: var(--deep-blue);
    }

    .nav a:hover,
    .header-links a:hover {
      color: #58a7ff;
      transform: translateY(-1px);
    }

    .header-links {
      margin-left: auto;
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .header-links a {
      font-size: 16px;
      line-height: 25.6px;
      white-space: nowrap;
    }

    .header-links a:first-child {
      color: var(--blue);
      font-weight: 500;
    }

    .detail-main {
      padding-top: 100px;
      background: #f9f9fa;
    }

    .detail-heading-band {
      background: #fff;
      border-bottom: 1px solid #eee;
      padding: 24px 50px 31px;
    }

    .detail-heading-inner {
      width: min(1805px, calc(100vw - 100px));
      min-height: 124px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      align-items: stretch;
      justify-content: flex-start;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      min-height: 32px;
      color: #888;
      font-size: 20px;
      line-height: 32px;
      font-weight: 400;
    }

    .breadcrumb a {
      color: #888;
      transition: color .2s ease;
    }

    .breadcrumb a:hover {
      color: var(--deep-blue);
    }

    .detail-title {
      margin-top: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 15px;
    }

    .detail-title img {
      width: 40px;
      height: 23px;
      object-fit: contain;
      flex: 0 0 auto;
    }

    .detail-title h1 {
      margin: 0;
      color: #111;
      font-size: 48px;
      line-height: 76.8px;
      font-weight: 500;
      text-align: center;
      white-space: nowrap;
    }

    .detail-content-section {
      background: #f9f9fa;
      padding: 40px 50px 80px;
    }

    .detail-article-card {
      width: min(1805px, calc(100vw - 100px));
      margin: 0 auto;
      padding: 50px;
      border-radius: 12px;
      background: #fff;
      box-shadow: 0 4px 8px rgba(0, 0, 0, .04);
    }

    .detail-article-card p {
      width: min(1600px, 100%);
      margin: 0 auto;
      color: #666;
      font-family: "Microsoft YaHei", "Noto Sans SC", sans-serif;
      font-size: 20px;
      line-height: 38px;
      font-weight: 400;
      text-align: justify;
    }

        .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity .64s ease, transform .64s ease;
      transition-delay: var(--delay, 0ms);
    }

    .reveal.is-visible {
      opacity: 1;
      transform: translateY(0);
    }

    @media (max-width: 1840px) {
      .topbar-inner { padding: 0 40px; gap: 70px; }
      .logo-wrap,
      .logo {
        width: 250px;
        height: 25px;
      }
      .nav { gap: 36px; }
      .nav a { font-size: 21px; }
    }


    @media (max-width: 1500px) {
      .topbar-inner {
        padding: 0 28px;
        gap: 34px;
      }
      .nav {
        gap: 24px;
        margin-left: 0;
      }
      .nav a {
        font-size: 18px;
        line-height: 30px;
      }
      .nav a.active::after {
        width: 86px;
        bottom: -32px;
      }
      .header-links { display: none; }
      .detail-title h1 {
        font-size: 40px;
        line-height: 64px;
      }
    }


    @media (max-width: 1180px) {
      .topbar { height: 84px; }
      .topbar-inner { padding: 0 22px; gap: 24px; }
      .logo-wrap, .logo { width: 220px; height: 22px; }
      .nav {
        flex: 1 1 auto;
        justify-content: space-between;
        gap: 14px;
        overflow-x: visible;
      }
      .nav a { font-size: 16px; }
      .nav a.active::after {
        bottom: -27px;
        width: 86px;
      }
      .detail-main { padding-top: 84px; }
    }


    @media (max-width: 900px) {
      .topbar { height: 72px; }
      .topbar-inner {
        padding: 0 16px;
        gap: 16px;
      }
      .logo-wrap,
      .logo {
        width: 190px;
        height: 19px;
      }
      .nav {
        justify-content: flex-start;
        overflow-x: auto;
        scrollbar-width: none;
      }
      .nav::-webkit-scrollbar { display: none; }
      .nav a {
        font-size: 15px;
        line-height: 24px;
      }
      .nav a.active::after { bottom: -25px; }
      .detail-main { padding-top: 72px; }
    }


    @media (max-width: 768px) {
      .detail-heading-band,
      .detail-content-section {
        padding-left: 20px;
        padding-right: 20px;
      }
      .detail-heading-inner,
      .detail-article-card {
        width: 100%;
      }
      .breadcrumb {
        flex-wrap: wrap;
        font-size: 16px;
        line-height: 28px;
      }
      .detail-title h1 {
        font-size: 30px;
        line-height: 46px;
        white-space: normal;
      }
      .detail-title img {
        width: 28px;
      }
      .detail-article-card {
        padding: 28px 22px;
      }
      .detail-article-card p {
        font-size: 17px;
        line-height: 32px;
      }
      .footer-inner {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .copyright {
        width: calc(100% - 40px);
        margin: 32px auto 0;
      }
    }