html,body{width:100%; height:100%; margin:0; padding:0;}
.hulk{width:100%; height:100%; margin:0; padding:0; position: relative;background: url("../images/login/bg.jpg") no-repeat; background-size:cover;}
.hulk .cover{position: absolute;width:100%;height: 100%;background: rgba(0,0,0,0.5);left:0;top:0;}