Continue wide but honest: their range is value-tilted, your position is permanent.
The reference tier. 4-bet a tight value range, call with hands that flop well, fold the rest without ceremony.
The big blind 3-bets your button open instead of taking the discount — a move that announces a real hand or a real plan.
Assumes a standard 3-bet; 4-bet to ~2.2–2.5x the 3-bet. Deep, favor calls over 4-bets — a 4-bet pot at 500bb+ commits you with range disadvantage.