html

     
    
      
        
       
这是内容111
        
       
这里是内容222
        
       
这里是内容333
    
      
     

　　

css

　.inner{            width: 265px;            height: 400px;            position: absolute;            top: 33px;            left: 13px;            /*cursor: pointer;*/            overflow:hidden;        }        .innerbox{            overflow-x: hidden;            overflow-y: auto;            color: #000;            font-size: .7rem;            font-family: "\5FAE\8F6F\96C5\9ED1",Helvetica,"黑体",Arial,Tahoma;            height: 100%;        }        /*滚动条样式*/        .innerbox::-webkit-scrollbar {/*滚动条整体样式*/            width: 4px;     /*高宽分别对应横竖滚动条的尺寸*/            height: 4px;        }        .innerbox::-webkit-scrollbar-thumb {/*滚动条里面小方块*/            border-radius: 5px;            -webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2);            background: rgba(0,0,0,0.2);        }        .innerbox::-webkit-scrollbar-track {/*滚动条里面轨道*/            -webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2);            border-radius: 0;            background: rgba(0,0,0,0.1);        }