手绘草图包装提案板设计海报

Please generate a product introduction poster in the style of a "hand-drawn packaging proposal board" for [Product Name]. 

If I provide a product image, please use this image as the main reference, retain the product's core appearance features, packaging form, color, material, brand identity and overall temperament, and prioritize adopting the main color tone and color scheme from the product image for the design.
If I do not provide a product image, please automatically generate a product appearance and packaging design that matches the positioning of [Product Name], and automatically match natural and reasonable main color, auxiliary color, and background color based on product attributes, category characteristics, and temperament.

Overall poster style requirements:
This is not an ordinary e-commerce detail page, nor a simple studio-shot poster, but a creative proposal board that integrates "finished product image + packaging design sketch + brand concept development process". The overall presentation is a highly aesthetic, high-completion brand design display image, like a designer presenting a packaging concept scheme.

Image requirements:
- Vertical composition
- Use a unified and brand-aware main color tone background, the background color is naturally determined by the product itself, not fixed to a certain color
- The color scheme should be coordinated with product attributes: if there is a reference image, prioritize inheriting the main color and brand color of the reference image; if there is no reference image, automatically generate a reasonable color scheme based on the product name
- Place the most complete and eye-catching product main visual in the center of the image, with realistic texture, three-dimensional light and shadow, and commercial finished product effect
- Add multiple auxiliary visual elements around the product: packaging sketches from different angles, structural sketches, partial shape explorations, hand-held display drafts, packaging unfolding ideas, brand typography layout experiments
- Add natural and casual black or dark hand-drawn line drafts, arrows, circled marks, symbols, handwritten Chinese annotations, to give the image a strong sense of "design process" and "creative proposal"
- The finished product image should be relatively exquisite and realistic, while the sketch part should be relatively casual and dynamic, forming a contrast between "finished product + design sketch"
- The layout looks relaxed and free, but the overall should have order, rhythm, and a visual center, reflecting a high-end graphic design sense
- Can moderately add small graphics, small symbols or fun elements related to the product to enhance brand memory points
- The final effect should have a sense of brand, creativity, process, and visual impact

Color scheme principles:
- Do not fix a yellow background
- Automatically select the main color tone based on product type, material, purpose, consumer feeling, and brand temperament
- The background color, product color, text color, and sketch line color should be coordinated with each other
- Can use a high-saturation single-color background, or a soft and unified color palette background, as long as the overall has a sense of brand and visual impact
- Colors should naturally serve the product, rather than overshadowing it

Style keywords:
Packaging design proposal board, brand concept development, hand-drawn sketch, design process sense, moodboard, creative review draft, finished product rendering, visual experiment, commercial design poster

Please pay special attention:
- If there is a reference product image, prioritize following the reference image, do not deviate from the product itself
- If there is no reference image, automatically generate a reasonable product appearance, packaging, and color scheme based on the product name, and maintain the overall style unity
- The focus of the image is "product introduction + creative design process display"
- Do not make it into an ordinary e-commerce detail page, do not make it into a promotional poster, do not make it overly neat and rigid, do not lack sketches and handwritten annotations, do not have a cheap sense, do not have a low-brow cartoon sense