版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/css-social-buttons/1.4.0/css/zocial.css
- https://cdn.bootcdn.net/ajax/libs/css-social-buttons/1.4.0/css/zocial.eot
- https://cdn.bootcdn.net/ajax/libs/css-social-buttons/1.4.0/css/zocial.min.css
- https://cdn.bootcdn.net/ajax/libs/css-social-buttons/1.4.0/css/zocial.svg
- https://cdn.bootcdn.net/ajax/libs/css-social-buttons/1.4.0/css/zocial.ttf
- https://cdn.bootcdn.net/ajax/libs/css-social-buttons/1.4.0/css/zocial.woff