在css最开头的部分，添加如下css: 

::-webkit-scrollbar{width: 10px;height:10px;}::-webkit-scrollbar-track{-webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2);border-radius: 0px;background: rgba(0,0,0,0.1);}::-webkit-scrollbar-thumb{border-radius: 5px;-webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2);background: rgba(0,0,0,0.2);}::-webkit-scrollbar-thumb:hover{border-radius: 5px;-webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2);background: rgba(0,0,0,0.4);}