css3的nth-child(n)的兼容性问题/* standard nth */ul.menu li:nth-child(3){ /* styles for the 3rd LI */}/* IE nth */ul.menu>li + li + li { /* styles for the 3rd LI */}/* alternate, more specific IE nth */ul.menu>li:first-child + li + li { /* styles for the 3rd LI */}参考链...【阅读全文】