css笔记：
1.优先级：行内-内联-链入-@import2.伪对象清除浮动：.clearFix：after{ clear:both; display:block; visibility:hidden; height:0; line-height:0; content:"";}.clearFix{zoom:1}
CSS笔记
原文：https://www.cnblogs.com/tangsujuan/p/12974554.html
