Please transform the input image into a minimalist single-line illustration suitable for social media avatars, with a default aspect ratio of 1:1. The subject can be a person, cat, dog, other animals, or plants. Based on the input subject type, automatically extract the most recognizable outer contours and key features, and summarize them into an artistic, minimalist single-line avatar/image illustration. The overall goal is not mechanical outlining, but retaining the subject's charm and recognizability, reconstructing it with higher elegance and spirit through single lines. [Subject Processin
