.con_left li{
    background: #3385ff url(/lib/images/jiantou.png) no-repeat 155px center;
    width: 252px;
    height: 73px;
    line-height: 73px;
    position: relative;
    margin-top: 3px;}
.con_left li a{
    font-size: 14px;
    color: #efeeee;
    text-align: center;
    display: block;
    width: 180px;}
.con_left li.active {
    background: #7ed1f5 url(/lib/images/jiantou.png) no-repeat 155px center;
}
.con_left li:hover{
    background: #7ed1f5 url(/lib/images/jiantou.png) no-repeat 155px center;
}
.con_left li:hover a{color: #fff;}
.con_left li.active a{color: #fff;}