卡通扁平化风格夏日促销热气球漂浮蓝天白云场景插画

Summer sale banner template, with summer hot air balloon elements and the text "Summer", it has become the standard flat illustration style of summer, with cute cartoon style, bright colors and high saturation color matching. High resolution image, rich in colors and details, best quality of details, illustration style, cute and lively atmosphere, white background