卡通风格3D渲染城市体育场足球场跑道观众席现代建筑

modern minimalist stadium scene, central sand or grass field, surrounded by blue running track with white lane lines, modern grandstands and buildings at the edges, lush green trees in the background, distant cityscape with bridges, natural and fresh color palette of blue, green, and brown, open and bright environment, functional and modern design, conveying a sense of openness, vitality, and modernity