@media screen and (min-width: 1490px){ .w1224{ width: 1400px !important; }}@media screen and (max-width: 1489px){ .w1224{ width: 1200px !important; }}
根据屏幕自适应宽度：@media
原文：https://www.cnblogs.com/shark1100913/p/9206300.html
