<style>
table{
border-collapse:collapse;
}
table tbody{
display:block;
height:195px;
overflow-y:scroll;
}
table thead, tbody tr{
display:table;
width:100%;
table-layout:fixed;
}
table thead{ width:calc(100% -1em ) } //对齐
table thead th{
background:#ccc;
}
</style>
border-collapse: collapse;
}
