body .default_products_detail1 .products_may_like .like_products_box .like_products_item:hover .item_img img.ok:nth-child(1){opacity: 0;z-index: -1;}
body .default_products_detail1 .products_may_like .like_products_box .like_products_item:hover .item_img img.ok:nth-child(2){opacity: 1;z-index: 1;}