3D渲染未来科技感数字电路城市夜景深蓝色冷色调背景

3D rendered illustration, main color scheme in blue, with deep blue and light blue as primary colors, accented with white and yellow. The upper part features a city skyline with towering buildings and sparkling lights. The lower part showcases a circuit board pattern with neat lines and a central chip-like graphic. The city and circuit board are connected by lines, forming a network structure. Background is a gradient blue night sky, creating a strong technological atmosphere. Modern and tech-savvy visual effect, conveying the integration of smart cities and information technology. No people, no text.