.bg-xac-nhan{background:url(../img/bg_blue.710db005.png);height:600px;background-repeat:no-repeat;background-position:50%;background-size:cover}@media only screen and (max-width:425px){.logo-eoffice{height:60px;margin-bottom:-80px}}@media only screen and (max-width:375px){.logo-eoffice{height:60px;margin-bottom:-80px}}@media only screen and (max-width:320px){.logo-eoffice{height:60px;margin-bottom:-80px}}