.preview_container {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: start;
  .preview_center {
    width: 10px;
  }
  .preview_left {
    width: 10%;
    height: 100%;
    .select {
      background-color: red;
      color: #fff;
    }
    > span {
      display: block;
      padding-left: 10px;
      cursor: pointer;
      height: 35px;
      line-height: 35px;
    }
  }
  .preview_right {
    width: 75%;
    height: 100%;
  }
}
.folder_box {
  .close_icon {
    position: absolute;
    top: 10px;
    right: 0px;
    display: none;
  }
}
.folder_box:hover{
  .close_icon {
    display: inline-block;
  }
}