.box-grid-cmn {
  margin-top: 70px;
}
.box-staff-cmn{
  position: relative;
  cursor: pointer;
  background: #000;
}
.box-staff-cmn img {
  opacity: 1;
  display: block;
  width: 100%;
  height: auto;
  transition: .5s ease;
  backface-visibility: hidden;
}
.box-staff-cmn .txt-middle {
  transition: .5s ease;
  opacity: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  text-align: center;
}
  .box-staff-cmn .txt-middle span {
    color: #fff;
    font-size: 11px;
  }
.box-staff-cmn:hover img {
  opacity: 0.3;
}
.box-staff-cmn:hover .txt-middle {
  opacity: 1;
}

@media (max-width: 739px) {
  .box-grid-cmn{
    margin-top: 0px;
  }
  .box-staff-cmn .txt-middle span{display: block; font-size: 11px;}
  .box-staff-cmn .txt-middle span .txt-lg{font-size: 16px !important;}
}