.iclouddrive-icon {
    background-repeat: no-repeat;
    background-size: 52px 52px;
    height: 52px;
    width: 52px;
    background-image: url("http://images.apple.com/v/ipad-air-2/c/assets/specs/icon_icloud_drive_large.jpg")
}
@media only screen and (-webkit-min-device-pixel-ratio: 1.5),
(min-resolution: 144dpi),
(min-resolution: 144dppx) {
    .iclouddrive-icon {
        background-image: url("http://images.apple.com/v/ipad-air-2/c/assets/specs/icon_icloud_drive_large_2x.jpg")
    }
}