.case{
  padding: 1.25rem 0;
}
.cooperation{
  padding: 1.25rem 0 2rem;
}
.imgs-wall{
  margin-top:.5rem;
}
.imgs-wall .img-category{
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: -.35rem;
}
.imgs-wall .img-category.hidden{
  display: none;
}
.imgs-wall .img-category>div{
  font-size: 0px;
  width:23.5%;
  margin-right: 2%;
  margin-bottom: .35rem;
  transition: all 300ms linear;
}
.imgs-wall .img-category>div>img{
  width: 100%;
  height: 100%;
}
.imgs-wall .img-category>div:nth-of-type(4n){
  margin-right: 0;
}
.imgs-wall .img-category>div:hover{
  box-shadow: .0125rem .0125rem .25rem #e6e6e6;
  border-color: transparent!important;
}
.collapse~div{
  display: none;
}
/* 查看更多操作 */
.more-btn{
  position: relative;
}
.imgs-wall .img-category .more-btn{
  display: inline-block;
  width:23.5%;
  height: 100%;
  text-align: center;
}
.imgs-wall .img-category .more-btn>img{
  width: 100%;
  height: 100%;
  visibility: hidden;
}
.read-more{
  font-size: .2rem;
  font-weight: 400;
  color: #666666;
  position: absolute;
  width: 100%;
  height: 100%;
  top:0;
  left: 0;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  border: .0125rem solid #EAEAEA;
}
.read-more span{
  margin-right:.2rem;
}
.imgs-wall .img-category .read-more .more-icon{
  width: .5rem;
  height: .5rem;
}

@media screen and (max-width: 768px) {
  .case{
    padding: 1.9048rem 0;
  }
  .read-more{
    font-size: .5079rem;
  }
  .imgs-wall{
    margin-top: .9524rem;
  }
  .imgs-wall .img-category .img-row{
    margin-bottom: .6349rem;
  }
  .imgs-wall .img-category>div{
    width: 32%;
  }
  .imgs-wall .img-category>div:nth-of-type(4n){
    margin-right: 2%;
  }
  
  .imgs-wall .img-category>div:nth-of-type(3n){
    margin-right: 0;
  }
  .imgs-wall .img-category .img-row .read-more .more-icon{
    width: .6349rem;
    height: .6349rem;
  }
  .imgs-wall .img-category .more-btn{
    width: 32%;
  }
}