Hand-drawn sketch packaging proposal board design poster

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

请为【产品名称】生成一张“手绘包装提案板风格”的产品介绍海报。 

如果我提供了产品图片，请以该图片为主要参考，保留产品的核心外观特征、包装形态、颜色、材质、品牌识别和整体气质，并优先沿用产品图中的主色调与配色关系进行设计。
如果我没有提供产品图片，请根据【产品名称】自动生成符合该产品定位的产品外观与包装设计，并根据产品属性、品类特征和气质，自动搭配自然合理的主色、辅助色和背景色。

海报整体风格要求：
这不是普通电商详情页，也不是单纯棚拍海报，而是一张融合“产品成品图 + 包装设计草图 + 品牌概念开发过程”的创意提案板。整体呈现为高审美、高完成度的品牌设计展示图，像设计师正在展示一个包装概念方案。

画面要求：
- 竖版构图
- 使用统一且有品牌感的主色调背景，背景颜色根据产品本身自然决定，不固定为某一种颜色
- 配色应与产品属性协调：如果有参考图，优先继承参考图的主色和品牌色；如果没有参考图，则根据产品名称自动生成合理的色彩方案
- 画面中央放置一个最完整、最吸睛的产品主视觉，具有真实质感、立体光影和商业成品效果
- 产品周围加入多个辅助视觉元素：不同角度的包装草图、结构草图、局部造型探索、手持展示小稿、包装展开思路、品牌字样排版试验
- 加入自然随性的黑色或深色手绘线稿、箭头、圈画、符号、手写中文批注，让画面具有强烈“设计过程感”和“创意提案感”
- 成品图要相对精致真实，草图部分要相对随性灵动，形成“完成品 + 设计草图”的对比
- 版式看起来松弛自由，但整体要有秩序、有节奏、有视觉中心，体现高级平面设计感
- 可以适度加入与产品相关的小图形、小符号或趣味元素，增强品牌记忆点
- 最终效果应具有品牌感、创意感、过程感和视觉冲击力

配色原则：
- 不要固定黄色背景
- 要根据产品类型、材质、用途、消费感受和品牌气质自动选择主色调
- 背景色、产品色、文字色、草图线稿色应彼此协调
- 可以使用高饱和单色背景，也可以使用柔和统一色系背景，只要整体有品牌感和视觉冲击力
- 色彩应自然服务于产品，而不是喧宾夺主

风格关键词：
包装设计提案板、品牌概念开发、手绘草图、设计过程感、moodboard、创意评审稿、产品成品渲染、视觉实验、商业设计海报

请特别注意：
- 如果有参考产品图，优先遵循参考图，不要偏离产品本身
- 如果没有参考图，则根据产品名称自动生成合理的产品外观、包装和配色方案，并保持整体风格统一
- 画面重点是“产品介绍 + 创意设计过程展示”
- 不要做成普通电商详情页，不要做成促销海报，不要过度整齐呆板，不要缺少草图和手写批注，不要廉价感，不要低幼卡通感