.columnList{
  background:#fff;
}
.columnList .List_li {
 float: left;
 width: 33.333333%;
 box-sizing: border-box;
 background: #fff;
 position: relative;
 border-right: 1px solid #f0f0f0;
 border-bottom: 1px solid #f0f0f0;
 padding: 20px 20px 60px;
 margin-bottom: 0;
 height: auto;
}
.List_li .img_boxA{
  width: 100%;
  height: 235px;
  display:block;
  overflow:hidden;
}
.img_boxA img{
  width: 100%;
  transition: all 0.3s;
}
.img_boxA:hover img{
  transform: scale(1.05);
}
.List_li .dy_title{
  margin-top: 20px;
  font-size: 16px;
  font-weight: 600;
  display:block;
}
.List_li .date{
  position: absolute;
  right: 20px;
  bottom: 20px;
}
 @media only screen and (max-width:768px) {
  .columnList .List_li{
 width: 50%;
  }
 }
  @media only screen and (max-width:420px) {
  .columnList .List_li{
 width: 100%;
 border-right:none;
 padding: 10px 10px 60px;
  }
 }