1.左侧添加阴影
修改左侧盒子:
  .discovery-left-part{
    height: 300px;
    width: 110px;
    background: #FFFFFF;
    margin-right: 10px;
    margin-left: 5px;
    box-shadow: 0 5px 10px #d4d4d4;
  }
2.调整类别样式
修改代码如下:
<style scoped>
  .discovery-content-box{
    margin-top: 20px;
  }
/**  总宽度1140 **/
  .discovery-left-part{
    width: 105px;
    background: #FFFFFF;
    margin-right: 10px;
    margin-left: 5px;
    box-shadow: 0 5px 10px #d4d4d4;
  }
  .discovery-left-part li{
    cursor: pointer;
    text-align: center;
    width: 105px;
    height: 40px;
  }
  .discovery-left-part li:hover{
    background: #ff4500;
    color: white;
  }
  .discovery-left-part span{
    line-height: 40px;
  }
  .discovery-center-part{
    width: 710px;
    background: fuchsia;
    height: 1000px;
    margin-right: 10px;
    margin-left: 10px;
  }
  .discovery-right-part{
    height: 500px;
    width: 280px;
    background: #4d555d;
    margin-left: 10px;
  }
</style>
整体效果如下: 























