A Review of Webdesign Corporate by Pim Hogeweg

In order to use your space more effective I would move the intro paragraph to the header and make it much shorter, which is better to read.

Then, after you put it there you just place a 'call-to-action' button under it which guides the user to, for example, the about page.

For the drop-up navigation, I would use arrows so people can see there is going to flow a menu out of it.

Design is very clean, I like it. Hope this was helpful ;-)