/* TOC Boot 保底样式：即便 JS 迟到，也先保证可见 */
.toc nav#TableOfContents,
.toc-wrapper nav#TableOfContents {
  opacity: 1;
  visibility: visible;
  max-height: none;
}

@media (min-width: 1200px) {
  .toc, .toc-wrapper {
    position: sticky;
    top: 10vh;
    align-self: start;
    max-height: 80vh;
  }
  .toc #TableOfContents,
  .toc-wrapper #TableOfContents {
    overflow: auto;
    max-height: 80vh;
  }
}