Media Queries 写法示例

@media screen {

}

@media print {

}

@media only screen and (min-width: 320px) {

}

@media only screen and (min-width: 768px) {

}

@media only screen and (min-width: 980px) {

}

@media only screen and (max-width:320px) and (max-height: 480px) {

}

@media only screen and (orientation : landscape) {

}

@media only screen and (orientation : portrait) {

}