扁平绘本插画：温暖日常场景

扁平矢量绘本插画，画面里一个短发小孩和一个圆头小机器人坐在草地上看书，
旁边有一棵圆冠树和几只小鸟，远处是柔和的湖面与山丘，天空为浅蓝渐变。
配色清新（草绿、湖蓝、暖黄），线条简洁圆润、粗细一致，无阴影堆叠，
构图留白舒适、主体偏左，右侧留出放标题的空间，无文字、无水印、无 logo。

Flat vector children's-book illustration: a short-haired child and a round-headed little robot
reading a book on a grassy hill, a round-canopy tree and several birds nearby, a soft lake and
hills in the distance, light blue gradient sky. Fresh palette (grass green, lake blue, warm yellow),
simple consistent rounded outlines, no heavy shading, comfortable negative space with the subject
slightly left so the right side is free for a title. No text, no watermark, no logo.

不要文字、不要水印、不要 logo、不要复杂阴影、不要写实照片、不要三维渲染