卡通风儿童小男孩小女孩环保场景植树分类插画海报

masterpiece, 9:16 vertical poster, energy conservation theme, gentle flat illustration style, muted blue-green palette. Layout: cute cartoon characters planting trees, using energy-saving bulbs, recycling waste. Headline: "微小行动,汇聚绿色力量" Tagline: "节约每一度电,为地球多留一片绿" Warm and healing vibe, clean lines, no text distortion.