/* 共用新增样式：官网说明、新闻动态、展览馆入口。 */
.official-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 24px;
  margin: 16px auto 0;
  padding: 16px 20px;
  font-size: 14px;
  line-height: 1.8;
}
.site-identity {
  text-align: center;
  font-size: 14px;
  margin: 24px 16px 0;
}
.global-nav {
  flex-wrap: wrap;
}
.global-nav a {
  white-space: nowrap;
}
.updates-main {
  max-width: 1160px;
  margin: auto;
  padding: 0 24px 80px;
}
.updates-intro {
  padding: 64px 0 32px;
}
.updates-main h1 {
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.35;
  font-weight: 500;
}
.updates-main h2 {
  font-size: clamp(23px, 2.5vw, 32px);
  line-height: 1.5;
}
.news-item {
  padding: 32px 0;
  border-top: 1px solid currentColor;
}
.news-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: 14px;
}
.news-item h2 a:hover,
.reading-column a:hover,
.site-map a:hover {
  text-decoration: underline;
}
.reading-column {
  max-width: 820px;
  margin: auto;
  padding-top: 48px;
  font-size: 18px;
  line-height: 1.95;
}
.reading-column h2 {
  margin-top: 40px;
}
.reading-column a,
.site-roles a {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.breadcrumbs {
  font-size: 14px;
}
.lead {
  font-size: 20px;
}
.site-roles dt {
  font-weight: 700;
  margin-top: 24px;
}
.site-roles dd {
  margin: 8px 0 24px;
}
.exhibition-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
  margin-top: 24px;
}
.exhibition-feature img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  height: auto;
}
.site-map {
  columns: 2;
  padding-left: 24px;
  line-height: 2;
}
.site-map li {
  break-inside: avoid;
  margin-bottom: 12px;
}
@media (max-width: 760px) {
  .exhibition-feature {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .site-map {
    columns: 1;
  }
  .reading-column {
    font-size: 16px;
  }
  .updates-intro {
    padding-top: 36px;
  }
}