Nano Banana Pro Instagram Post Series: Declare a Design System for Consistency

The keyword for an Instagram post series is 'consistency': write the grid, font weight, and primary color as a text-based design system, explicitly instruct the model to 'remember this and carry it forward,' and generate every subsequent image within that same conversation. A fixed color block with the account name in the corner acts as a small anchor that makes the whole set look like 'the same account.' Even so, style can still drift gradually after five or six generations in a row — the moment you notice it drifting, repaste the original design-system paragraph to pull it back. Small text on a square canvas gets blurry on mobile, so keeping information sparse rather than dense is a genuine recommendation, not just a suggestion.

填下面的欄位，上方 prompt 會即時替換 [方括號] 內容。填好後按「複製組好的 prompt」直接丟進工具。

幫我生成一張 IG 貼文圖，這是一個系列的第一張，之後會在同一個對話繼續生同系列的其他張。

【帳號定位】這個 IG 帳號的主題是[帳號主題]，視覺要讓人一眼覺得專業但不冰冷。
【格式】1:1 正方形、適合手機閱讀的字級。
【設計系統】整個系列共用以下設定，請記住並在後續每一張沿用：主色[品牌主色]＋白底、相同的邊距與網格、標題一律粗黑體置於上方三分之一、右下角固定留一個小色塊放帳號名『[帳號名稱]』。
【本張內容】標題：『[本張標題]』；標題下方用簡單的插圖或圖示呈現主題，風格扁平、留白多，資訊量寧少勿多。
【圖上文字】全部繁體中文、不能有錯字；除了標題與帳號名，不要自行加字。

風格確認後，我會用「同系列下一張，標題是…」繼續，請維持同一套設計系統不要漂移。