index.css

.card-item::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  background: rgba(0, 0, 0, 0.4);
}
.card-item .card-content {
  position: absolute;
  height: 100%;
  width: 100%;
  z-index: 9;
  top: 0;
  left: 0;
}
.card-item .object-cover {
  filter: blur(1px);
  transition: all 0.2s;
}
.card-item:hover .object-cover {
  transform: scale(1.02);
  filter: blur(0);
}