简约插画风蓝色背景粉色黄色白色光斑梦幻明亮背景

minimalist background, blue color scheme, white and colorful light spots, no people, central bright light source, radiant light spreading outward, radiant effect, bright and fresh atmosphere, open blue sky, colorful light spots around the light source, light texture, gradient blue background, bright and dazzling visual effect, positive and warm emotion