//iphoneX、iphoneXs

@media only screen and (device-width: 375px) and (device-height: 812px) and (-webkit-device-pixel-ratio: 3) {
}

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即: 设备屏幕可见宽度为375px， 可见高度为812px及设备像素比为3

 

//iphone Xs Max
@media only screen and (device-width: 414px) and (device-height: 896px) and (-webkit-device-pixel-ratio:3) {
}

 

//iphone XR
@media only screen and (device-width: 414px) and (device-height: 896px) and (-webkit-device-pixel-ratio:2) {
}

//横屏

@media all and (orientation : landscape) { 

} 

 

//竖屏

@media all and (orientation : portrait){ 

} 

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