Prompt:

Main character must have the boldest outline. Background lines must be thinner and simpler. Expressive but clean illustration with clear, open shapes easy to color. Steampunk elements (gears, pipes, airships) only in medium or large shapes, no micro-details, no repetitive small textures. Balanced composition with 70% focus on the main character and 30% simple background. Black and white line art only, pure white background. No shading, no grayscale, no pencil texture, no tiny details, no clutter. Clean vector-like outlines, bold contour for character, thinner contour for background. The scene shows: a young steampunk inventor boy wearing goggles, holding a single broken gear in his hands, looking at it with a soft, child-like expression of disappointment eyebrows slightly lowered, small frown, relaxed pose --no color grayscale shading texture sketch clutter tiny details noise --ar 8:11 --raw --v 7.0

主角必须有最大胆的轮廓。背景线条必须更细且更简单。表现力强但干净的插图，形状清晰、开放，易于上色。蒸汽朋克元素（齿轮、管道、飞艇）仅在中型或大型形状中出现，不要微小细节，不要重复的小纹理。构图平衡，主角占70%的比例，简单背景占30%。只允许黑白线条艺术，纯白背景。没有阴影，没有灰度，没有铅笔纹理，没有小细节，没有杂乱。干净的矢量般的轮廓，角色的轮廓粗线，背景的轮廓细线。场景展示：一个年轻的蒸汽朋克发明家男孩，戴着护目镜，手里拿着一个破损的齿轮，眼神柔和，带着孩子般的失望，眉毛稍微低垂，嘴角有小皱纹，姿势放松。