.data-model {
  display: flex;
  background-color: #fff;
  height: 100%;

  .left {
    width: 230px;
    border-right: 1px solid #EFEFEF;
    overflow: hidden;
  }

  .tree-toggle-wrap {
    position: relative;
    width: 20px;
    height: '100%';
  
    .tree-toggle {
      display: flex;
      justify-content: center;
      align-items: center;
      left: 0;
      right: 0;
      background: #f2f5fc;
      position: absolute;
      top: calc(50% - 40px);
      width: 12px;
      height: 80px;
      border-radius: 0 12px 12px 0;
      -ms-transform: translateY(-50%);
      transform: translateY(-50%);
      cursor: pointer;
    }
  }

  .right {
    width: calc(100% - 250px);
  }
}

.data-model-collapse {
  .left {
    width: 0;
  }

  .right {
    width: calc(100% - 20px);
  }
}