.yy_nav{
    background-color: #F5F5F5;
    border: 1px solid #D9D9D9; 
}
.yy_nav li a{
    height: 38px;
    padding: 0 20px;
    cursor: pointer;
    display: block;
    line-height: 38px;
}
.yy_nav .present a{
    background-color: #DBF1E1;
    color: #06CC71;
}
.yy_nav li a:hover{
    background-color: #DBF1E1;
    color: #06CC71;
}
.tub{
    width: 890px;
    height: 400px;
   
}
.yis_title span{
    width: 4px;
    height: 20px;
    background-color: #06CC71;
    display: block;
    margin-right: 6px;
}
.yis_title div{
    font-size: 30px;
    color: #06CC71;
    font-weight: bold;
}