Normalize.css：优化重置CSS默认属性

官方网站：http://necolas.github.io/normalize.css/

项目仓库：https://github.com/necolas/normalize.css/

下载方法:

NPM

npm install --save normalize.css

Bower

bower install --save normalize-css

CDN

See https://cdnjs.com/libraries/normalize

Download

See https://necolas.github.io/normalize.css/latest/normalize.css