element-plus/docs/.vitepress/vitepress/styles/content/table-of-content.scss

@use '../mixins' as *;

.toc-wrapper {
  display: none;
  padding-left: 64px;
  .toc-content {
    position: sticky;
    top: calc(var(--header-height) + 32px);
    margin-top: 32px;
    padding: 4px 8px 4px 12px;
    margin-bottom: 32px;
    width: var(--toc-width);
    .toc-marker {
      opacity: 0;
      position: absolute;
      background-color: var(--brand-color);
      border-radius: 4px;
      width: 4px;
      height: 14px;
      top: 30px;
      left: 0;
      z-index: 0;
      transition: top 0.25s cubic-bezier(0, 1, 0.5, 1), opacity 0.25s,
        background-color 0.5s;
    }

    &__heading {
      font-size: 12px;
      color: var(--text-color-light);
      font-weight: 600;
      text-transform: uppercase;
      margin-top: 0;
    }

    .toc-items {
      list-style: none;
      padding: 0;
      margin: 12px 0 0;
      line-height: 1.2;

      .toc-item {
        margin-top: 10px;
        font-size: 11px;
        color: var(--text-color-lighter);
        text-overflow: ellipsis;
        overflow: hidden;
        white-space: nowrap;
        color: inherit;

        .toc-link {
          position: relative;
          color: var(--text-color-lighter);
          transition: color var(--el-transition-duration);
          &.active {
            color: var(--brand-color);
          }
        }

        &.subitem {
          padding-left: 1rem;
        }
      }
    }
  }

  @include respond-to('xlg') {
    display: block;
  }
}