极简扁平矢量城市旅行海报

Premium minimal flat-vector travel poster for [CITY_NAME], 3:4 vertical.
Create an airy city scene with large typography-safe negative space in the upper-left.
Add [CITY_NAME] and one short elegant English caption matching the city mood.
Automatically adapt the background to the city:
one iconic primary landmark, local architecture, café culture, transport sign,
street lamp, flowers, trees, small decorative details, and calm daily-life moments.
Use 3–6 people only, naturally interacting with the city:
talking at a café, walking, jogging, sketching, or taking photos.
Avoid crowds and avoid a single hero character.
Style:
Japanese stationery aesthetic, luxury sticker illustration,
premium commercial flat-vector poster,
clean thin outlines, consistent line weight,
flat colors only, no shading, no gradients, no texture.
Palette:
blush pink, dusty rose, sage green, warm cream, soft beige, muted gray-green.
Mood:
minimal, elegant, calm, refined, high-end travel postcard and lifestyle branding.
No realism, no watercolor, no painterly effects, no photorealism, no dense background.9:["

为 [CITY_NAME] 创作的高级极简扁平矢量旅行海报，3:4 垂直比例。
创建一个通透的城市场景，左上角留有大面积适合排版的负空间。
添加 [CITY_NAME] 和一段与城市氛围匹配的简短优雅的英文说明文字。
根据城市自动调整背景：
一个标志性的主要地标、当地建筑、咖啡馆文化、交通标志、路灯、花卉、树木、细小的装饰细节以及平静的日常生活瞬间。
仅使用 3–6 个人，自然地与城市互动：
在咖啡馆交谈、行走、慢跑、写生或拍照。
避免拥挤，避免出现单一的主角人物。
风格：
日系文具美学、高奢贴纸插画、高级商业扁平矢量海报、干净的细轮廓、一致的线宽、仅限纯色、无阴影、无渐变、无纹理。
调色板：
腮红粉、干枯玫瑰色、鼠尾草绿、暖奶油色、柔和米色、柔和灰绿色。
氛围：
极简、优雅、平静、精致、高端旅行明信片和生活方式品牌。
无写实主义、无水彩、无绘画效果、无照片写实感、无密集背景。