Safari flexbox未正确包含其元素

I have created a simple flexbox based page, which renders properly in Google Chrome (Version 44.0.2403.157), but not in Safari (Version 8.0.2 (10600.2.5)). I have added all of the relevant prefixes (I think) and have spent a lot of time looking at the inspector but I do not seem to have found the cause of the problem.I have created a simple flexbox based page, whi