.thumbnail-big-shadow{
  border-radius: 0;
  -webkit-box-shadow: 0 5px 10px rgba(0,0,0,.2);
  -moz-box-shadow: 0 5px 10px rgba(0,0,0,.2);
  box-shadow: 0 5px 10px rgba(0,0,0,.2);
  border: 5px #fff solid;
}

.item-news:hover > .thumbnail-big-shadow > img{
  transform: scale(1.5,1.5);
  opacity: 0.5;
  transition: 500ms ease-in-out;
}