/* Shared top navigation only; page content and local research menus stay independent. */
.deng-header {
  position: static;
  border-bottom: 1px solid #d6dcd3;
  background: #f7f6f1;
  color: #243730;
  font: 16px/1.85 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}
.deng-header .header-row {
  box-sizing: border-box;
  width: min(1020px, calc(100% - 64px));
  margin: auto;
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 0;
  padding: 22px 0;
}
.deng-header .brand {
  color: #24483f;
  font: 600 16px/1.85 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: .04em;
  text-decoration: none;
  white-space: nowrap;
}
.deng-header .brand span {
  display: inline;
  font: inherit;
  border: 1px solid #8c9e90;
  padding: 3px 8px;
  margin-right: 10px;
}
.deng-header nav[aria-label="主导航"] {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  width: auto;
  padding: 0;
  margin: 0;
}
.deng-header nav[aria-label="主导航"] a {
  box-sizing: border-box;
  flex: 0 0 auto;
  color: #24483f;
  font: 400 14px/1.85 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: normal;
  white-space: nowrap;
  text-decoration: none;
  padding: 6px 0;
  margin: 0;
  border: 0;
  border-bottom: 2px solid transparent;
}
.deng-header nav[aria-label="主导航"] a[aria-current="page"] {
  border-bottom-color: #24483f;
  font-weight: 600;
}
.deng-header .brand:focus-visible,
.deng-header nav[aria-label="主导航"] a:focus-visible {
  outline: 3px solid #885238;
  outline-offset: 5px;
}
/* Retain the legacy button for its existing script, but expose links at every width. */
.deng-header .menu { display: none; }
@media (max-width: 680px) {
  .deng-header .header-row {
    width: calc(100% - 36px);
    flex-direction: column;
    align-items: flex-start;
    flex-wrap: nowrap;
    gap: 12px;
    padding: 16px 0;
  }
  .deng-header nav[aria-label="主导航"] {
    display: flex;
    width: 100%;
  }
  .deng-header .menu { display: none; }
}

/* Material reading stays linear; previews use native details without scripts. */
.original-pages{margin-top:22px;border-top:1px solid #d6dcd3;padding-top:12px}summary{cursor:pointer}summary:focus-visible{outline:3px solid #885238;outline-offset:4px}.hash{overflow-wrap:anywhere}.deng-header~main a{overflow-wrap:anywhere}

.materials-page .grid{grid-template-columns:minmax(0,1fr);gap:22px}.materials-page .card{padding:28px 32px}.materials-page .card h3{font-size:23px}.materials-page .file-list{display:flex;flex-wrap:wrap;gap:12px}@media(max-width:680px){.materials-page .card{padding:22px 20px}}