Sphinx documentation: define but hide heading/title text

I'm using Sphinx to document a Python package. The top of the title page / splash page holds a graphic with a logo and text for the project. This gives the visual appearance that I want, but because I have defined no top-level heading the page title metadata (which renders in the browser tab) is set to <no title> — my project name.

Is there a way I can do one of the following?

1. Define a title text but not have it render as a heading on the page?
2. Set the title page metadata some other way?