*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}
.main{
    height:100vh;
}
.main .realWrapper{
    position:fixed;
    width: 100%;
    top:100px;
    bottom:0px;
    overflow:scroll;
    background-color:red;
}
.scroller-pullDown, .scroller-pullUp {
    width: 100%;
    height: 30px;
    padding: 5px 0;
    text-align: center;
}
 
.dropdown-list {
    padding: 0;
    margin: 0;
}
    
.dropdown-list li {
    width: 100%;
    background: #ddd;
    line-height: 45px;
    text-align: center;
    color: #FFF;
    border-bottom: 1px solid #FFF;
}