.achievement{
  padding: 50px 70px;
  background-color: #fff;
  
}

.achievement .ac-li{
  width: 212px;
  height: 345px;
  margin-right: 70px;
  margin-bottom: 30px;
  border-radius: 4px;
  overflow: hidden;
  padding: 5px;
  border: 1px solid #eee;
}
.achievement .ac-li:nth-of-type(4n){
  margin-right: 0;
}
.achievement .ac-li img{
  width: 100%;
  height: 295px;
  object-fit: cover;
  border-radius: 4px;
  overflow: hidden;
}
.achievement .ac-li:hover {
   box-shadow: 6px 10px 24px #0207141a;
  transition: all .5s
}

.ac-content{
  margin-bottom: 60px;
  display: flex;
  flex-wrap: wrap;
}
.achievement .acl-title{
  text-align: center;
  height: 30px;
  line-height: 30px;
  font-size: 18px;
  margin-top: 5px;
}

@media (max-width:750px) {
  .ac-content{
    margin-bottom: 0;
  }
  .achievement{
    padding: .2rem;
    margin: 0 .2rem;
  }
  .achievement .ac-li{
    width: 48%;
    margin-right: .25rem;
  }
  .achievement .ac-li:nth-of-type(2n){
    margin-right: 0;

  }
  
  .achievement .ac-li img{
    width: 4.4rem;
  }
}