比如下面的代码，不知为什么第一个article的字体不会变色？htmllogoarticle1article2article3cssarticle:first-child{color:red;}运行效果http://jsfiddle.net/M9EBA/
htmllogoarticle1article2article3cssarticle:first-child{color:red;}运行效果http://jsfiddle.net/M9EBA/
article1article2article3cssarticle:first-child{color:red;}运行效果http://jsfiddle.net/M9EBA/
article2article3cssarticle:first-child{color:red;}运行效果http://jsfiddle.net/M9EBA/
article3cssarticle:first-child{color:red;}运行效果http://jsfiddle.net/M9EBA/
color:red;}运行效果http://jsfiddle.net/M9EBA/
}运行效果http://jsfiddle.net/M9EBA/
http://jsfiddle.net/M9EBA/
弑天下
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