怎么填变量：[戴角盔的小勇士和一只紫色小龙] 换成你游戏里的主角或吉祥物，比如"拿法杖的猫耳小法师和一只白色小狐狸""穿宇航服的小熊"；[城堡] 可换成"天空神殿""蘑菇村庄"。[游戏标题]、[一句话简介]、[类型标签] 是活动文案，例如"寻宝大冒险 / 登岛就送十连抽 / 冒险RPG"，不需要文字时把这一行整行删掉。示例图里是一个戴维京角盔、披蓝色斗篷的小男孩和一只紫色小龙并排开宝箱，金光和星星喷向天空，左右是带木桥的浮空岛和瀑布，右上方远处有一座紫色城堡，画面没有加标题字。

常见问题与调整：

• 生成成了贴在墙上的海报照片：把"直接输出平面设计本身，铺满画布"放到第一句。
• 标题字是乱码：标题控制在 4～6 个字，并写"标题文字准确、无错字"；或者先出无字版，后期用设计软件加字。
• 角色太小：加"两个角色占画面高度的一半以上，位于中央偏下"。
• 要做竖版开屏图：画幅改 9:16，背景改为"空岛从上到下层层堆叠"。

适合：游戏活动公告、版本更新横幅、社群宣传图、桌游 / 独立游戏众筹页头图。

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

改编自 @AIGuideNote 发布、YouMind-OpenLab/awesome-nano-banana-pro-prompts 收录的提示词，仓库许可证 CC BY 4.0。