From capital airport to city

HI. I know it's roughly RMB100-120 for normal hours and a 4 seater taxi from airport to city.
1. How much will it roughly be if it's midnight?
2. How much is it for a minivan that can fit 7 at 2am from airport to city?
3. Is it true that you usually need to wait for a long time for taxi and minivan in T2?