版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/pretty-checkbox/3.0.3/maps/pretty-checkbox.css.map
- https://cdn.bootcdn.net/ajax/libs/pretty-checkbox/3.0.3/pretty-checkbox.css
- https://cdn.bootcdn.net/ajax/libs/pretty-checkbox/3.0.3/pretty-checkbox.min.css