iPad mini将继承与原始iPad相同的视口大小。但是为了更精确，您可以指定iPad mini的像素密度，因此：

The iPad mini will just inherit the same viewport size as the original iPad. But for more precise, you can target pixel density of the iPad mini, so:

/* ipad Mini Portrait */
@media only screen and (width:768px) and (resolution: 163dpi) {

}

/* ipad Mini Landscape */
@media only screen and (width:1024px) and (resolution: 163dpi) {

}