body
{
    width:920px;
    margin:0 auto;
    font-size:14px;font-family:"微软雅黑";
}
table
{
    width:800px;margin:0 auto;text-align: center;
}
a:link{text-decoration: none ;color:black;}
td,th{text-align: center;}
.tl{width:300px;}