Table加滚动条

table tbody {
    display:block;
    height:200px;
    overflow-y:scroll;
    overflow-x:hidden; // pc网页需要加上
    -webkit-overflow-scrolling: touch; // 为了滚动顺畅 
}
 
table tbody::-webkit-scrollbar {
    display: none; // 隐藏滚动条，pc网页去掉这个
}
 
table thead, tbody tr {
    display:table;
    width:100%;
    table-layout:fixed;
}
 
table thead {
    width: calc( 100% - 1em )
}
table thead th{ background:#ccc;}