.clearfloat:after{display:block;clear:both;content:"";visibility:hidden;height:0;} 
.clearfloat{zoom:1;}
.pic_lby{width:100%;height:auto;}
.pic_lby li{width:50%;float:left;height:244px;}
.pic_lby li .pic_tit{
   width:200px;
   height:244px;
   display:block;
   margin:0 auto;}
.pic_lby li .pic_tit img{
   width:200px;
   height:138px;}
.pic_lby li .pic_tit .tittle{
   heihgt:100px;
   line-height: 26px;
   font-size: 14px;
   color: #393939;
   text-align:center;}