SASS - fo0ol
Sass (Syntactically Awesome StyleSheets)
Sass 是对 CSS 的扩展，让 CSS 语言更强大、优雅。 它允许你使用变量、嵌套规则、 mixins、导入等众多功能， 并且完全兼容 CSS 语法。 Sass 有助于保持大型样式表结构良好， 同时也让你能够快速开始小型项目， 特别是在搭配 Compass 样式库一同使用时。
CSS预处理器，重量级底层，有强大的库。
基于Ruby。
官网：
http://sass-lang.com/
国内：
http://www.w3cplus.com/sassguide/
安装：
参考：http://www.w3cplus.com/sassguide/install.html
先安装Ruby
入门：http://www.w3cplus.com/sassguide/
强大的Compass框架库
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