Vertical split retro watercolor illustration poster

Create a vertical "Upper-Lower Split" style poster, the canvas is strictly divided into upper and lower areas, the upper part is the original real photography, and the lower part is a retro watercolor hand-drawn editorial illustration translation of the same subject. The overall temperament is relaxed, playful, gentle, fashionable, retro, and with a small amount of humor.

Upper Part:
Place the original photo uploaded by the user. Use figures, pets, animals, or the relationship between figures and pets as the main subject of the picture, clearly presenting the subject's facial features, hairstyle, hair color, clothing, actions, postures, and overall atmosphere. The upper part maintains a real photographic style without illustration processing, and can be moderately cropped to enhance the focus on the subject. The background should be restrained as much as possible, with buildings and complex spaces only serving as a weakened environment, not as the main content.

Lower Part:
Extract the most recognizable subject, outline, posture, and narrative relationship from the photo in the upper part, and reconstruct it into a light, naive, and retro hand-drawn editorial illustration. Do not mechanically replicate details; re-express with summarized modeling, moderately exaggerated proportions, symbolic features, and humorous visual metaphors, while keeping the original object recognizable at a glance. Integrate modernist editorial illustration, Bauhaus graphic composition, children's picture books, naive art, and fashion sketch temperament. The shapes are concise, the outlines are slightly hesitant with manual errors, and local features can be moderately enlarged, giving the picture a sense of story, fashion, and playfulness.

The color scheme is extracted from the uploaded original photo, using a high-brightness, low-to-medium saturation soft limited color palette, unifying the atmosphere with analogous colors, and creating visual jumping points with small areas of complementary colors. Use a mixed texture of watercolor, gouache, colored pencils, pastels, and dry brushes, retaining paper grain, transparency, broken brushstrokes, rough edges, slight dirty colors, and old printing color registration deviations. The background uses a large area of white space, supporting the subject only with loose light colors, local diagonal lines, or simple geometric elements, avoiding complex scene accumulation, realistic lighting and shadow, smooth vectors, three-dimensional rendering, and over-refinement.

The text extracts a small amount of English keywords, titles, serial numbers, or suitable golden sentences from the location, character, scene, or theme of the photo, and continues the hand-drawn editorial language of the picture. The main title uses handwritten art fonts with a slight sense of naivety and retro, and the auxiliary text uses restrained and gentle sans-serif or serif fonts, which can be slightly misplaced, tilted, stretched, color-stacked, or produce old printing color registration shifts, making the text grow naturally in the picture like a part of the illustration, rather than a layout element pasted on later.

Overall, use off-white or light-colored backgrounds and a large amount of white space. Subject features, colors, postures, and visual symbols maintain unified echoes in the picture. The overall temperament is relaxed, playful, retro, gentle, smart, fashionable, humorous, romantic, and relaxed, with a slight clumsiness and quirky confidence, like a page of a carefully preserved old fashion picture book and modern art magazine.

The whole needs to clearly convey "the upper part is the original photo reference, and the lower part is the retro watercolor editorial illustration translation of the same subject," with both identity consistency and obvious style contrast between the two.