.f56{ font-size:56px;}
.main .about .text {
  height: 100px;
  display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  margin-top: 30px;
}
@media only screen and (max-width: 1200px) {
  .main .about .text {
    height: 72px;
  }
  .f56{ font-size:36px;}
}

@media only screen and (max-width: 768px) {
   
  .f56{ font-size:20px;}
  .banner{ margin-top: 0px;}
}