index.css

.card-item .object-cover {
  filter: brightness(0.6) blur(1px);
  -webkit-filter: brightness(0.6) blur(1px);
  -ms-filter: brightness(0.6) blur(1px);
  -moz-filter: brightness(0.6) blur(1px);
  -o-filter: brightness(0.6) blur(1px);
  transition: all 0.2s;
}
.card-item:hover .object-cover {
  transform: scale(1.02);
  filter: brightness(0.6);
  -webkit-filter: brightness(0.6);
  -o-filter: brightness(0.6);
  -ms-filter: brightness(0.6);
  -moz-filter: brightness(0.6);
}