1, 媒体查询表达式之间还可以用逗号,@media (max-width:800px), print 它表示或的意思 @media (max-width: 800px) OR print; 2, not 是对整个表达式的否定 @media not all and (min-width: 765px), 相当于 @media not (all and (min-width: 765px)) 如果不想这样的做,可以用,进行分割,@media not all, min-width:765px 3,
In CSS media the difference between width and device-width can be a bit muddled, so lets expound on that a bit. device-width refers to the width of the device itself, in other words, the screen resolution of the device. Lets say your screen's resolut