版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/bf-solid/2.11.2/solid.2.11.2.css
- https://cdn.bootcdn.net/ajax/libs/bf-solid/2.11.2/solid.2.11.2.min.css
- https://cdn.bootcdn.net/ajax/libs/bf-solid/2.11.2/solid.latest.css
- https://cdn.bootcdn.net/ajax/libs/bf-solid/2.11.2/solid.latest.min.css