.vvv_01 div {
  width: 270px;
  height: 256px;
}

.wudi.tta {
  top: 213px;
}

.vvv_01 ul li:hover::before {
  background: rgba(25, 189, 201, .85);

}

.chemistry .chemistry_fr:nth-child(2) .vvv_01 ul li .cnv {
  width: 270px;
  overflow: hidden;
}

.chemistry .chemistry_fr:nth-child(2) .vvv_01 ul li .cnv img {
  cursor: pointer;
  transition: all 0.6s;
}

.chemistry .chemistry_fr:nth-child(2) .vvv_01 ul li .cnv img:hover {
  transform: scale(1.3);
  transition: all 1s ease 0s;
  -webkit-transform: scale(1.3);
  -webkit-transform: all 1s ease 0s;
}

@media screen and (max-width: 768px) {
  .chemistry .chemistry_fr:nth-child(2) .vvv_01 ul li .cnv {
    width: 100%;
  }
}