If you use header tags at the beginning of each chapter, you can even do it easier:
Code:
h2 + p {text-indent: 1.2em;}
Then you wont need the para1 class for this then. Also, your class could probably be cleaned up. Normal you don't need the padding, margin and border settings. It is usually easier to set that up in the html or body tag (so one level up). Due to inheritance, it would work downwards into the children.