.competence{+line-height:20px;}

我知道*是IE的CSS黑客攻击.只有IE7且低于http://www.javascriptkit.com/dhtmltutors/csshacks3.shtml

我想知道“”是什么意思？

感谢帮助 ：)

最佳答案 从您链接到的网站：
http://www.javascriptkit.com/dhtmltutors/csshacks3.shtml

Although Internet Explorer 7 corrected its behavior when a property name is prefixed with an underscore or a hyphen, other non-alphanumeric character prefixes are treated as they were in IE6.

该字符计为“其他非字母数字字符”,因此它将“视为在IE6中处理”.

我猜它是* hack(* property：value)的变种.

更常规的用途是选择器：see the w3c for details.