@media only screen and (-Webkit-min-device-pixel-ratio: 1.5), 
only screen and (-moz-min-device-pixel-ratio: 1.5), 
only screen and (-o-min-device-pixel-ratio: 3/2), 
only screen and (min-device-pixel-ratio: 1.5) {
.footer_inner .logo > img,
.header_mid_inner .logo img {
display:none;
}
.footer_inner .logo > .footer_logo_retina,
.header_mid_inner .logo .logo_retina {
display:inline-block;
}
}