[411111111111111]

I only did depth=1 because the syntax doesnt change, i still don't see a difference to speak of

css:

    div:has( > \* > \* > \* > \* > \* > \* > \* > #the-child)
    (backslashes added by hn because of formatting conflict)

xpath:

    //div[@id="the-child"]/../../../../../../../..