@media (device-pixel-ratio : 2),(-o-min-device-pixel-ratio : 2),(min--moz-device-pixel-ratio : 2),(-Webkit-min-device-pixel-ratio : 2),(device-pixel-ratio : 1.5),(-o-min-device-pixel-ratio : 1.5),(min--moz-device-pixel-ratio : 1.5),(-Webkit-min-device-pixel-ratio : 1.5),(min-resolution: 192dpi),(min-resolution: 144dpi) {
.content-wrapper{background-image:url(../images/bg_retina/about_bg.jpg);background-size:1288px 128px}
}