.tocs {
  line-height: 26px;
}
nav.tocs > .inner {
  position: sticky;
  top: 56px;
  overflow: auto;
  max-height: calc(100vh - 56px);
}
nav.tocs .inner > .tocs-list {
  overflow: hidden;
  position: relative;
}
.tocs .tocs-list li {
  list-style: none;
}
.tocs-list {
  margin: 0;
  padding-left: 10px;
}
.tocs-list.is-collapsed {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
}
.tocs-list.is-collapsed.is-open {
  max-height: 9999px;
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
}

.tocs-link {
  height: 100%;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}
.tocs-link::before {
  background-color: var(--color-border-default);
  content: ' ';
  display: inline-block;
  height: inherit;
  left: 0;
  margin-top: -1px;
  position: absolute;
  width: 2px;
}
.tocs-link.is-active-link {
  font-weight: 700;
}
.tocs-link.is-active-link::before {
  background-color: #54bc4b;
}