.confin-intro { position: absolute; right: -50px; max-width: 550px; z-index: 999; }
.confin-silencio { position: absolute; left: -50px; z-index: 999; }

@media screen and (max-width: 991px) {
    .confin-intro { position: relative; right: auto; max-width: none; }    
    .confin-silencio { position: relative; left: auto; }
}