@media (max-width: 991px) {


    @media screen and (min-color-index:0) 
    and(-webkit-min-device-pixel-ratio:0) { @media{
        header {

            -webkit-background-size: 155% 100% !important;
            -moz-background-size: auto 100%;
            -o-background-size: auto 100%;
            background-size: auto 100%;
            background-attachment: initial !important;
        }

    }}


}