卡通手绘风梦幻童话天空彩虹云朵彩色山丘插画

Cute cartoon school background with sky blue gradient color. A large area is left blank, decorated with rainbow clouds. The illustration style is flat, using flat vector graphics design with high resolution. The style is 2D, with no text or letters in the center frame. Colorful clouds, cute characters, white borders, children's drawing style with traditional animation elements.