简约扁平风格矢量插画海报

Transform the uploaded photo into a playful flat-vector poster illustration. Analyze the photo and naturally preserve the main human subject, the animal, their pose, clothing, relationship, scenery, and overall mood. Keep the core composition and recognizable features from the original image, but simplify everything into a cute, clean, graphic poster style. Use clean thick black outlines, simple rounded geometric shapes, flat solid color fills, minimal facial details, small neutral eyes, a calm deadpan expression, and simplified hands and body proportions. Apply soft pastel color blocking based on the mood and colors of the original photo. Simplify the background while keeping the feeling of the original scenery. Add clean negative space, sparse confetti doodles, tiny abstract icons, and subtle playful decorative elements. Make the final artwork feel charming, modern, minimal, cute, and visually polished, like a crisp graphic poster illustration. 4:5