位置绝对和底部0

http://cdpn.io/FykHr
我似乎有一个问题， CSS属性：

http://cdpn.io/FykHr I seem to have an issue with the combined CSS properties:

position: absolute;
bottom: 0;

首先，您可以看到.footer div不是在底部。现在，将 font-size 从 120px 更改为 50px 并且div似乎正在按照我的方式工作。

First you can see that the .footer div doesn't isn't at the bottom. Now, change the font-size from 120px to 50px and the div seems to be working the way I inteded it to.

如何让.footer div留在底部（不固定在屏幕底部）。

How do I make the .footer div stay at the bottom (not fixed at the bottom of the screen) regardless of the size of the .content div.