.rb_bbs_for_img img {width: 0px; height:0px; border-radius: 10px; object-fit: cover;}
.rb_bbs_wrap .rb_bbs_for .rb_bbs_for_cont {}

@media all and (max-width:512px) { 
    .rb_bbs_for_img img {width: 100%; height:auto;}
}