Retro pop art style riverside main visual image

Create a retro pop art style key visual using this character. Use the reference image only as a character reference; do not reuse the original image's composition, pose, background, or framing. Use flat-style animated shadows with slightly thicker outlines. Ensure the layout emphasizes white space and avoids information overload.{argument name="scene setting" default="A summer riverbank. Sitting on the grassy concrete steps, holding a half-eaten ice cream, gazing blankly at the river."} The composition should include three layers: foreground, middle ground, and background, to create a natural sense of depth. Place subtle elements in the foreground to enhance the atmosphere, position the character as the protagonist in the middle ground, and keep the background simple to convey a sense of space and distance. Ensure each layer is arranged in an orderly manner, avoiding information overload. The composition should not resemble a flat illustration, but rather allow the viewer's eye to naturally flow into the depths of the image. Express a retro feel naturally through color schemes, atmosphere, composition, and design, rather than using obvious symbols or explanatory text. Avoid excessive detail, high-density AI-style illustrations, particle effects, cluttered backgrounds, or glaring lighting. The goal is to create a simple yet stylish image, like a poster.