#corpo {
background-size: 100%!important;
background-repeat: no-repeat!important;
}

@media screen and (max-width: 768px) {
#corpo {
    background-image: url('https://cdn.awsli.com.br/664/664447/arquivos/feedback_mobile.jpg');
}

li[data-type="control_scale"]:before {
	display: none;
}
}