极简风城市夜景插画

极简向量海报描绘夜晚城市天际线，使用扁平色彩，干净的几何建筑，天空采用微妙渐变效果，窗口灯光发光，前景有一棵树的剪影，气氛宁静，现代极简艺术风格，前景与背景清晰分离

AI art prompt English：

Minimalist vector poster of city skyline at night, flat colors, clean geometric buildings, subtle gradients for sky, glowing window lights, single tree silhouette in foreground, calm atmosphere, modern minimalist art style, clear separation of background and foreground