通过引用.jumbotron方法，实现构建超大的Hreo界面，醒目的在网站上展示关键的营销信息，轻量、灵活。
This is a simple hero unit, a simple jumbotron-style component for calling extra attention to featured content or information.
It uses utility classes for typography and spacing to space content out within the larger container.
想要让广告大屏幕占满当前显示浏览器全屏、不带有圆角，只要添加.jumbotron-fluid CSS修饰符，并在里面添加一个.container 或 .container-fluid 内容空间即可。
This is a modified jumbotron that occupies the entire horizontal space of its parent.