.cont
{
    margin-left:auto;
    margin-right:auto;
    width:816px; 
    height:538px;
}

.col1 a, .col2 a, .col3 a 
{
    display:block;
    color:#0e5bab; 
    font-family:"黑体"; 
    font-size:30px; 
    font-weight:bold;
    text-align:center; 
    float:left;
}

.col1 a:hover, .col2 a:hover, .col3 a:hover 
{
    color:#F90;
}

.tip 
{
    color:#000; 
    font-weight:bold; 
    font-size:13px; 
    text-align:center; 
    margin-top:10px; 
    margin-bottom:20px;
}

.back a 
{
    color:#fff; 
    font-size:13px; 
    font-weight:bold; 
    text-align:center;
    float:right;
}