body{margin:0px; background:url("index-legica-construccion.jpg") top center no-repeat; background-size: cover; background-position-x: 55%;}
a{display:block; top:0px; left:0px; right:0px; bottom:0px; margin:0px;  width:100%;}
.movil{display: none;}
@media(max-width: 950px){
    body{background: none;}
    .movil{display: block; width: 100%;}
}