极简 Lofi 壁纸生成提示词

"A minimal flat vector illustration of the subject in the attached image lying on its side, resting its head on the edge of a large rounded rectangle banner. The subject is drawn in simple line-art style with smooth curves, closed eyes, and a relaxed sleepy pose. The banner must be at the bottom leaving the 1/3 of the negative space, The banner is a soft pastel {argument name="banner color" default="lemon green"} rounded rectangle with subtle shadow. The background is pure white, clean and empty, leaving lots of negative space above. Modern UI illustration style, soft minimal design, playful and calm mood, crisp vector lines, high resolution. In 9:16 aspect ratio"