通用手机端样式: @media all and (orientation : portrait) { /*竖屏*/ } @media all and (orientation : landscape) { /*横屏*/ } 指定手机端高度样式: @media screen and (max-width: 750px) @media screen and (min-width: 720px) and (max-width: 960px) {//720 <= xxx < 960>=768的设备