简约现代风3D渲染绿色山丘自然风光清新和谐场景插画

minimalist background, green and blue color scheme, fresh and natural style, scene of grassland and blue sky, grassland in lower half, blue sky in upper half, peaceful and serene atmosphere, open and spacious environment, no decorative elements, no text, natural gradient background, bright and fresh visual effect, conveying a sense of peace and natural beauty