Nano Banana Pro 角色一致性：同一角色連生整套系列圖不走鐘
做品牌角色貼文、繪本或社群系列圖最怕第二張就變臉。這份指令把「鎖定區」和「可變區」分開寫：臉部、固定特徵、風格鎖死，每張只換動作與場景。一次生一張、重複套用同一個開頭，整個系列才穩。
以我上傳的角色參考圖為基準生成新圖，必須是「同一個角色」。
鎖定不變（每一張都相同）：
- 臉部特徵與五官比例與參考圖完全一致
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官方說法是 Pro 支援最多 14 張參考圖、其中 6 張可做高保真人物鎖定，實務上一張清楚的正面參考圖就能跑很遠。訣竅是把 prompt 拆成鎖定區和可變區：提示越空泛、生成越空泛，鎖定區寫得越具體（髮型、配件、色盤）走鐘率越低。一次生一張比一次要四張穩很多；如果某張臉跑掉，直接重生那一張就好，不要回頭改鎖定區。
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