简约黑笔手绘涂鸦风格插画

以简约的手绘涂鸦风格漫画绘制，仿佛是由人用黑色记号笔素描而成。使用自然的马克笔线条，略微抖动的轮廓，细微的手绘瑕疵，略微开放的边缘，以及一种温暖的社论涂鸦感。避免抛光的矢量干净结果，避免过于清晰的数字完美，并保持图像简洁、轻盈、平扁且低调。仅使用天蓝色作为强调色。

Draw in a simple hand-drawn doodled style cartoon, as if sketched by a person with a black felt-tip pen. Use natural marker lines, slightly wobbly contours, subtle hand-drawn imperfections, slightly open edges, and a warm editorial doodle feeling. Avoid polished vector-clean results, avoid overly crisp digital perfection, and keep the image simple, airy, flat, and understated. Use sky blue only as the accent color.