.case-item {
  width: 32%;
  margin-right: 2%;
}
.case-item .card-img-toprou {
  height: 16.2rem;
}
.case-item:nth-child(3n+3) {
  margin-right: 0;
}
.case-btn {
  background: #ffffff!important;
  color: #1678fe;
  box-shadow: 0 2px 4px 0px #0049b2c2;
}
.case-btn:hover {
  color: #ffffff;
  background: linear-gradient(to right, #5098ff, #1476fe)!important;
  background-size: 100%;
}