.clearfloat:after{display:block;clear:both;content:"";visibility:hidden;height:0;} 
.clearfloat{zoom:1;}
.pic_slir{
  margin-top:30px;}
.pic_slir li{
   width:33.3%;
   height:220px;
   float:left;
   text-align:center;
   margin-bottom:20px;}
.pic_slir li a{
   display:block;
   width:80%;
   margin:0 auto;}
.pic_slir li a img{
   display:block;
   width:100%;
   height:180px;}
.pic_slir li a .zy_so{
   height:40px;
   line-height:40px;}