版本：0.5.1
- https://cdn.bootcdn.net/ajax/libs/elemental/0.5.1/elemental.css
- https://cdn.bootcdn.net/ajax/libs/elemental/0.5.1/elemental.js
- https://cdn.bootcdn.net/ajax/libs/elemental/0.5.1/elemental.min.css
- https://cdn.bootcdn.net/ajax/libs/elemental/0.5.1/elemental.min.js