header {
  
    padding-bottom: 0px;
}

    .topcre{
    margin-top: 24px;
    }
    .main_jianto,.zuo_jianto,.flate  {
    display: none;
    }.maintopicrightlenteng {
    width: 100%;
    flex-wrap: wrap;
    gap: 24px;
    }.aa {
    flex-direction: column;
    }
    .aa dt {
    width: 178px;
    height: 178px;
    }
.h2 {  margin: 0 auto;
    padding-bottom: 24px;
  padding-top: 24px;
}






@media (max-width: 1020px) {
  .ul_lhome {
    display: block;
  }
}
@media (max-width: 1000px) {
    .aa {
        width: 31%;
    }
}
@media (max-width: 765px) {
    .main {
    padding-top: 1px;
    }
    .aa dt {
    width: 110px;
    height: 110px;
    }
    .aa dd {
    width: 110px;
    }
    .maintopicrightlenteng {
    gap: 10px;
    }

  
  
  
  
  
  
  
  
  
  
}





@media (max-width: 345px) {

    .aa dt {
        width: 100px;
        height: 100px;
    }


}