Finding ResolveUrl/ResolveClientUrl Equivalents For Razor?

So I've started using the <%: Url.Content(~/site/blah) %> syntax as standard for CSS, JScript and Image urls - solves a lot of issues indeed; and it's at least consistent beween WebForms and Razor pages (not all of my devs will be doing Razor, and yet they will still be working on this platform I've produced).

However, for something that I'm doing at the moment I could really do with a way to take a relative Url written in a Razor page and, at run time, resolve it to the correct server side file, before turning it back into an absolute Url for the client. Url.Content doesn't do anything with relative Urls.

So, basically, I want either an equivalent of ResolveUrl or ResolveClientUrl at the Razor level.

I would like this to enable terser (and more tolerant to renaming) resource paths in some of my MVC views, which can be a few folders further down from the root, and whose content folder would be more easily expressed as a relative path - so I could have:

folderfolderviewssharedlayout.cshtml
and
folderfoldercontentsite.css

(I've inferred the use of a layout page, also, to mirror the kind of issues that are addressed by ResolveUrl and the re-basing that WebForms does)

Using Url.Content as it is, I would need to specify the full path:

Url.Content("~/folder/folder/content/site.css")

But what I would like is

Url.Content("../../site.css")

And have that work, of course, regardless of how many paths there are in the current request's route.

Of course I can get this to work in WebForms, if I ditch the Url.Content call and just rely on url rebasing.

Is there any equivalent in Razor?