Sass 3.4.8 发布了，Sass 扩展了 CSS3，增加了规则、变量、混入、选择器、继承等等特性。Sass 生成良好格式化的 CSS 代码，易于组织和维护。
该版本包含两项改动： When @extending selectors inside :not(), don't add a complexselector where none existed before to avoid breaking selectors onbrowsers that don't support that. Add a deprecation warning for passing numbers with units to the alphaarguments to rgba() and hsla(). In a future release, a percentage will beinterpreted according to the spec and other units will produceerrors.
下载地址：https://github.com/sass/sass/archive/3.4.8.zip | 
