amis/packages/amis-editor-core/scss/_outline.scss

@keyframes shake {
  10%,
  90% {
    transform: translate3d(-1px, 0, 0);
  }

  20%,
  80% {
    transform: translate3d(2px, 0, 0);
  }

  30%,
  50%,
  70% {
    transform: translate3d(-4px, 0, 0);
  }

  40%,
  60% {
    transform: translate3d(4px, 0, 0);
  }
}

.shake {
  animation: shake 0.82s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
  transform: translate3d(0, 0, 0);
  backface-visibility: hidden;
  perspective: 1000px;
}

.ae-Outline-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.ae-Outline {
  // margin-top: 16px;
  padding: 12px 6px 6px 12px;
  // width: $Editor-aside-width;

  flex: 1 1 auto;
  background: #fff;

  &-list,
  &-sublist {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  &-list {
    margin-left: 16px;
  }

  &-sublist {
    margin-left: 16px;

    > .ae-Outline-node {
      &::before,
      &::after {
        position: absolute;
        content: '';
        background: $editor-border-color;
        display: block;
      }

      &::before {
        width: 8px;
        height: 1px;
        left: -25px;
        top: 13px;
        visibility: hidden; // 隐藏左侧连线（横线）
      }

      &::after {
        width: 1px;
        height: 100%;
        left: -25px;
        top: 0;
        visibility: hidden; // 隐藏左侧连线（竖线）
      }

      &:last-child::after {
        height: 13px;
      }
    }
  }

  &:hover {
    // hover时 显示连接线
    .ae-Outline-node {
      &::before,
      &::after {
        visibility: visible;
      }
    }
  }

  &-node {
    position: relative;
    margin: 0;
    padding: 4px 0;

    > a {
      margin-left: -8px;
      display: inline-block;
      min-width: 108px;
      padding: 0 8px;
      font-family: PingFangSC-Regular;
      font-size: 12px;
      color: $editor-default-color;
      line-height: 24px;
      font-weight: 400;
      text-decoration: none;
      user-select: none;
      cursor: pointer;
      display: inline-flex;
      flex-direction: row;
      justify-content: flex-start;
      align-items: center;

      &:hover {
        color: $editor-default-color; // 避免被其他全局样式覆盖
        background: $hover-bg-color;
      }
    }

    &.has-children > a {
      margin-left: 0;
    }

    &.is-region {
      > a {
        // padding: 2px 5px;
      }
    }

    &.is-hover {
      > a {
        background: $hover-bg-color;
        border-radius: 2px;
      }
    }

    &.is-active {
      > a {
        color: $editor-active-color;
        background: $active-bg-color;
        border-radius: 2px;
      }
    }

    &.is-folded > .ae-Outline-sublist {
      display: none;
    }

    span.has-keywords {
      color: $editor-active-color;
      font-weight: 600;
    }
  }

  &-expander {
    position: absolute;
    left: -16px;
    top: 8px;
    cursor: pointer;
    z-index: 2;
    display: inline-flex;
    justify-content: center;
    align-items: center;

    > svg {
      width: 16px;
      height: 16px;
      color: $default-icon-color;
      transform: rotate(0deg);
      transition: transform ease-out 0.1s;
    }

    // &:before {
    //   content: '';
    //   display: inline-block;
    //   width: 0;
    //   height: 0;
    //   border-style: solid;
    //   border-width: 4px 0 4px 6.9px;
    //   border-color: transparent transparent transparent $dark;
    //   transform: rotate(45deg);
    // }

    &.is-folded > svg {
      transform: rotate(-90deg);
    }
  }

  &-tip {
    color: $success;
    margin-bottom: 15px;
    animation: shake 0.82s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    perspective: 1000px;
  }
}