#oct-banner .button {
    width: 15.1%;
    height: 12%;
    right: 7.8%;
    bottom: 23.6%;
    text-indent: -9999px;
}
@media screen and (max-width: 767px) {
    #oct-banner .button {
        width: 46%;
        height: 8%;
        right: 27.2%;
        bottom: 12.7%;
    }
}