Engineering Sketch Aesthetic

A clean instructional infographic on a pure white background with precise engineering-style linework, handwritten dark gray title, and step-by-step annotations. Soft translucent watercolor accents in pale blue, green, and orange add a modern, professional, tech-oriented feel.

-  纯白色背景，大量留白 - 工程图纸线条风格（细腻、精确） - 手写体标题（深灰色） - 工程标注方式展示步骤 - 淡蓝色、淡绿色、淡橙色水彩点缀（高透明度） - 类似苹果/特斯拉产品设计手稿的现代感 - 简洁图标配合步骤说明 - 清爽、专业、科技感