.tocs {
  line-height: 26px;
}
nav.tocs > .inner {
  position: sticky;
  top: 24px;
  overflow: auto;
  max-height: calc(100vh - 106px);
}
nav.tocs .inner > .tocs-list {
  overflow: hidden;
  position: relative;
}
.tocs .tocs-list li {
  list-style: none;
  min-height: 34px;
}

.tocs-title {
  margin: 0 16px;
  font-size: 16px;
  font-weight: bold;
  height: 52px;
  line-height: 52px;
  color: #252933;
  border-bottom: 1px solid #e4e6eb;
  margin-bottom: 16px;
}
.tocs-list {
  margin: 0;
  padding-left: 24px;
}

.tocs-list .level2 {
  padding-left: 32px;
}

.tocs-list .level3 {
  padding-left: 36px;
}

.tocs-list .level4 {
  padding-left: 34px;
}

.tocs-list .level5 {
  padding-left: 34px;
}

.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:hover {
  text-decoration: none;
}

.tocs-link::before {
  background-color: #fff;
  content: " ";
  display: inline-block;
  height: inherit;
  left: 0;
  position: absolute;
  margin-top: 3px;
  width: 3px;
  border-radius: 4px;
  height: 20px;
}

.tocs-link.is-active-link {
  color: #1e80ff !important;
}

.toc .level1 {
  counter-reset: tocs;
}

.toc .level2 {
  counter-reset: tocs2;
}

.toc .level3 {
  counter-reset: tocs3;
}

.toc .level4 {
  counter-reset: tocs4;
}

.toc .level5 {
  counter-reset: tocs5;
}

.toc .level1 > li > a::before {
  counter-increment: tocs;
  content: counter(tocs) ". ";
  margin-top: 0px;
  margin-left: 14px;
}

.toc .level2 > li > a::before {
  counter-increment: tocs2;
  content: counter(tocs) "." counter(tocs2) " ";
  margin-top: 0px;
  margin-left: 38px;
}

.toc .level3 > li > a::before {
  counter-increment: tocs3;
  content: counter(tocs) "." counter(tocs2) "." counter(tocs3) " ";
  margin-top: 0px;
  margin-left: 62px;
}

.toc .level4 > li > a::before {
  counter-increment: tocs4;
  content: counter(tocs) "." counter(tocs2) "." counter(tocs3) "."
    counter(tocs4) " ";
  margin-top: 0px;
  margin-left: 86px;
}

.toc .level5 > li > a::before {
  counter-increment: tocs5;
  content: counter(tocs) "." counter(tocs2) "." counter(tocs3) "."
    counter(tocs4) "." counter(tocs5) " ";
  margin-top: 0px;
  margin-left: 110px;
}

.tocs-list.level1 a {
  color: #252933;
}

.tocs-list.level2 a {
  color: #5d6370;
}

.tocs-list.level3 a,
.tocs-list.level4 a,
.tocs-list.level5 a {
  color: #8a919f;
}