屬性選取器：
[attr~="value"] 單詞 單詞空格單詞 單詞必須value有效
[attr|="value"] value打頭 或者 value-單詞
注意：
屬性選擇 都是用則很難規則運算式來判別 選擇元素，效率要高一些
偽類別選取器：
：before
：after
:lang(val) val/val-單詞
：nth-child(n) n從1開始算起 odd基數 even偶數
:nth-of-type(n) 選取器匹配屬於父元素的特定類型的第 N 個子項目的每個元素.
<!doctype html><html><head><meta charset="utf-8"><title>無標題文檔</title><link href="css/index.css" rel="stylesheet" type="text/css" /></head><body><!--<p>aaaaaaa</p><p>aaaaaaa</p><p>aaaaaaa</p>---><div> <p>aaa</p> <p>aaa</p> <p>aaa</p> <p>aaa</p></div></body></html>Css部分：@charset "utf-8";/* CSS Document *//*p:before{ content:"ccc"; } p:lang(en){ border:1px solid #ff0000; }p:nth-child(even){ background:#F00; }*/p:nth-of-type(3){ /* p標記的父元素 下的 第3個p元素*/ background:#F00; }
相關閱讀：
怎樣隱藏溢出DIV的內容
CSS布局有哪些技巧
CSS裡字型樣式怎麼設定
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