版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/railroad-diagrams/1.0.0/railroad-diagrams.css
- https://cdn.bootcdn.net/ajax/libs/railroad-diagrams/1.0.0/railroad-diagrams.js
- https://cdn.bootcdn.net/ajax/libs/railroad-diagrams/1.0.0/railroad-diagrams.min.css
- https://cdn.bootcdn.net/ajax/libs/railroad-diagrams/1.0.0/railroad-diagrams.min.js