Giving webnovels another go...
Historical setting (fake dynasty but the departments and positions are all real and people in these departments are assigned the correct jobs) ✅
Equal partnership between the BL couple (well, at the moment more like hissing at each other over jurisdiction, but whatever, they're gonna get together) ✅
Minimal age gap ✅
Avoids modern memes and slang, semi-classical grammar ✅
Court politics (plus military conspiracy and murder mystery!) ✅
Food descriptions (ok, one scene with wonton, but I'll take what I can get) ✅
Tentatively hopeful this doesn't turn into something stupid... At least it's feeding my desire for a martial-civil officers couple. Personally love it when the martial-civil divide shows up in court politics dramas, so fun watching two different world views butting heads.
no subject
no subject
In that case 穿越重生 section might be more to your taste.
no subject