.bt2 ul li{float:left;padding:0 10px;line-height:14px;margin-right:20px;color:#fff;width:204px;height:170px;border-radius:12px;}
.bt2 ul li:hover{top:-3px; -webkit-box-shadow: 0 15px 20px rgba(0,0,0,0.1); -moz-box-shadow: 0 15px 20px rgba(0,0,0,0.1); -o-box-shadow: 0 15px 20px rgba(0,0,0,0.1); box-shadow: 0 15px 20px rgba(0,0,0,0.1);}
.bt2 ul li .li_main{width:100%;height:190px;float:left}
.bt2 ul li .li_main .item{text-align:center;font-size:20px;font-weight:700;margin-top:50px;margin-bottom:8px;font-family:'microsoft yahei',Verdana, Arial;}
.bt2 ul li .li_main .detail{text-align:center;margin:20px auto;line-height:22px;}