Foundation类似于Bootstrap，是一个免费的前端框架，用于快速开发；它已经在 Facebook, eBay, Samsung, Amazon, Disney等网站上使用。
Once you've exhausted the fun in this document, you should check out:
Everything you need to know about using the framework.
Foundation Code Skills
These online courses offer you a chance to better understand how Foundation works and how you can master it to create awesome projects.
Join the Foundation community to ask a question or show off your knowlege.
This is a twelve cell section in a grid-x. Each of these includes a div.callout element so you can see where the cell are - it's not required at all for the grid.