怎麼填變量：[戴角盔的小勇士和一隻紫色小龍] 換成你遊戲裏的主角或吉祥物，比如"拿法杖的貓耳小法師和一隻白色小狐狸""穿宇航服的小熊"；[城堡] 可換成"天空神殿""蘑菇村莊"。[遊戲標題]、[一句話簡介]、[類型標籤] 是活動文案，例如"尋寶大冒險 / 登島就送十連抽 / 冒險RPG"，不需要文字時把這一行整行刪掉。示例圖裏是一個戴維京角盔、披藍色斗篷的小男孩和一隻紫色小龍並排開寶箱，金光和星星噴向天空，左右是帶木橋的浮空島和瀑布，右上方遠處有一座紫色城堡，畫面沒有加標題字。

常見問題與調整：

• 生成成了貼在牆上的海報照片：把"直接輸出平面設計本身，鋪滿畫布"放到第一句。
• 標題字是亂碼：標題控制在 4～6 個字，並寫"標題文字準確、無錯字"；或者先出無字版，後期用設計軟件加字。
• 角色太小：加"兩個角色佔畫面高度的一半以上，位於中央偏下"。
• 要做豎版開屏圖：畫幅改 9:16，背景改為"空島從上到下層層堆疊"。

適合：遊戲活動公告、版本更新橫幅、社群宣傳圖、桌遊 / 獨立遊戲眾籌頁頭圖。

英文原版

[Game Campaign]
- Game Title: {argument name="game title" default="Treasure Hunt!"}
- Game Overview/Features: {argument name="description" default="Find treasures on a great adventure island!"}
- Genre/Subtext: {argument name="subtext" default="RPG Adventure Action!"}

[Quality, Production, Composition]
- Style: Illustration for event announcements for Japanese mobile RPGs or casual games. A colorful and joyful fantasy world.
- Subject: Adorable chibi characters (deformed heroes or mascots) opening a treasure chest with smiles. Golden light and magical particles are overflowing dazzlingly from the chest.
- Background: Blue sky, white clouds, and islands or forests in a lush fantasy world.
- Typography (for GPT-image / Nano Banana Pro): A fantasy-style decorative logotype of {argument name="game title" default="Treasure Hunt!"} is designed in the center or top of the screen, with {argument name="description" default="Find treasures on a great adventure island!"} and {argument name="subtext" default="RPG Adventure Action!"} added in an easy-to-read layout.
- Color/Lighting: Bright, high-saturation fantasy colors, magical gloss, and soft shadow depiction.

[Strict Layout and Output Constraints (Required)]
- Output the finished design itself, filling the entire screen. Backgrounds and scene descriptions (walls, spaces, shadows, etc.) within the design may follow the instructions in the main text.
- Prohibitions: Photos of the finished poster in a frame, photos pinned to a wall, mockup photos placed on a desk or paper, perspective distortion of paper edges, or drop shadows.
- Output the finished flat 2D design itself, filling the entire canvas. Scene elements inside the design (walls, rooms, shadows) described above are allowed. Absolutely NO photo-of-a-poster mockups: no picture frames, no poster-on-wall or poster-on-desk shots, no perspective warp or drop shadow around the artwork's edges.

- Aspect Ratio: --ar 16:9

改編自 @AIGuideNote 發佈、YouMind-OpenLab/awesome-nano-banana-pro-prompts 收錄的提示詞，倉庫許可證 CC BY 4.0。