Chibi RPG Game Campaign Key Visual

[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