ASP.Net markup question

Hi,

I have this markup in an Asp.Net 2.0 page:

<div align='RIGHT'><!--sizeo:4--><span style="font-size:14pt;line-height:100% <!--/sizeo--><!--coloro:white--><span style="color:white <!--/coloro--><i>Finding your item: </i><!--colorc--><!--/colorc--><!--sizec--><!--/sizec-->
<!--coloro:blue--><span style="color:blue <!--/coloro--><b>All</b> your items in one location.<!--colorc--><!--/colorc-->


As you can see, there are two font sizes and colours within one paragraph and all the text is on one line.

How do I do this with a CSS class?

I am wanting to make this comply with XHTML 1.0 Strict.

Also, is the use of permitted?

Thanks,
Darren