I recently posted in
a kind of mini-tutorial on how I deal with this same question, but using Nisus Writer Pro, rather than Word, which I haven’t used since v. 5.1a became deprecated. It consists of the .scriv project and the .rtf document that results from the workflow described.
Obviously, Word and NWP have different features and aspects, but I’m sure the principles of the workflow could be followed using Word. In fact, in another thread, someone posted asking for advice on Scrivener–>Mellel workflow, so I had a quick look at how it could be done in Mellel—which doesn’t use a stylesheet library as far as I can tell—but in Mellel the workflow was in some ways even easier than in NWP, so he is now following it up.
So, in the hope that that will help you …
Mr X