[DiapDealer]

I don't see any hanging indents anywhere there. I see an outline (which you should be able to easily achieve with css/style margins, blockquotes, or html lists). If you're talking about an html (inline) toc.

If you're talking about the ncx-based "goto" menu-based toc, you don't really have any control over how those are displayed (other than defining collapsible sections) how the ncx is presented is basically a function of the reading application.