css编码规范
https://segmentfault.com/a/1190000002460968
常用样式测试工具
W3C CSS validator：http://jigsaw.w3.org/css-validator/
CSS Lint：http://csslint.net/
CSS Usage：https://addons.mozilla.org/en-us/firefox/addon/css-usage/
css编码规范
https://segmentfault.com/a/1190000002460968
常用样式测试工具
W3C CSS validator：http://jigsaw.w3.org/css-validator/
CSS Lint：http://csslint.net/
CSS Usage：https://addons.mozilla.org/en-us/firefox/addon/css-usage/