amis2/packages/amis-editor-core/scss/_bcn.scss

.ae-Breadcrumb {
  flex: 0 0 22px;
  padding: 0;
  background: #fff;
  box-sizing: border-box;
  border-bottom: 1px solid $editor-border-color;
  z-index: 1000;
  padding: 0 16px;

  .ae-Breadcrumb-content {
    left: 0;
    height: 100%;
    width: max-content;

    white-space: nowrap;
    height: 22px;
    line-height: 22px;
    background: #fff;
    letter-spacing: 0;
    font-family: PingFangSC-Regular;
    font-size: 12px;
    color: #5c5f66;
    font-weight: 400;
    user-select: none;

    box-sizing: border-box;
    transition: left ease-out 0.15s;

    > ul {
      list-style: none;
      display: inline-block;
      margin: 0;
      padding: 0;
      > li {
        display: inline-block;
        margin: 0 0 0 8px;
        padding: 0;
        position: relative;

        &:first-child {
          margin: 0;
        }

        > span {
          display: inline-block;
          padding-right: 8px;
          line-height: 22px !important; // 避免被覆盖
          cursor: pointer;

          &:hover {
            text-decoration: none;
          }
        }
        // 同级元素选择弹层
        > ul {
          position: absolute;
          top: 26px;
          left: 0;
          min-width: 100px;
          max-height: 320px;
          line-height: 20px; // 32 - 12
          padding: 0;
          font-family: PingFangSC-Regular;
          font-size: 12px;
          color: #151b26;
          font-weight: 400;
          box-shadow: 0 2px 8px 0 rgba(7, 12, 20, 0.12);
          border-radius: 4px;
          background: #fff;
          list-style: none;
          z-index: 100000; // 设置一个最大的层级
          visibility: hidden;
          transition: all ease-out 0.15s;

          > li > span {
            display: block;
            padding: 6px 12px;
            cursor: pointer;
            &:hover {
              background: $active-bg-color;
              text-decoration: none;
            }
            &.is-active {
              color: $Editor-theme;
            }
          }
        }
        &:hover > ul,
        & > ul:hover {
          visibility: visible;
        }
      }
      > li:not(:last-child):after {
        color: #5e626a;
        content: '\003E';
      }

      > li:last-child > span {
        font-family: PingFangSC-Medium;
        font-size: 12px;
        color: #151b26;
        line-height: 20px;
        font-weight: 500;
        text-decoration: none;
      }
    }
  }

  .ae-Breadcrumb-scrollLeft-btn,
  .ae-Breadcrumb-scrollRight-btn {
    position: absolute;
    top: 0;
    left: 0;
    width: 40px;
    height: 41px;
    background-color: #fff;
    box-sizing: border-box;
    box-shadow: 2px 0 20px 0 rgb(0 0 0 / 10%);
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    visibility: hidden;
    z-index: 100000;

    svg {
      color: #151b26;
      width: 16px;
      height: 16px;
      transform: rotate(180deg);

      &:hover {
        color: $editor-active-color;
      }
    }
  }

  .ae-Breadcrumb-scrollRight-btn {
    left: auto;
    right: 0;
    box-shadow: -2px 0 20px 0 rgb(0 0 0 / 10%);

    svg.icon-editor-double-arrow {
      transform: rotate(0deg);
    }
  }

  &:hover {
    .ae-Breadcrumb-scrollLeft-btn,
    .ae-Breadcrumb-scrollRight-btn {
      visibility: visible;
    }
  }
}