生成一张 16:9 横版城市视觉海报，主题为「{城市名称}」。画面主体是一组巨大的中文城市名称，字体清晰、端正、优雅，采用汉字遮罩 / 镂空 / 透明窗口效果。
不要把文字变成立体建筑字，不要让笔画复杂变形。请先生成一幅统一、连续、完整的城市景观长卷，再让整组中文城市名称作为遮罩裁切这幅景观。
无论城市名称有几个字，所有汉字都共同显示同一幅城市主场景，不能每个字一个独立场景。
主地标只出现一次，景观统一透视、统一光源、统一色彩。文字周围可以少量加入符合城市气质的线描装饰或辅助元素，但必须克制。
整体色彩明亮清透，饱和度适中偏高，背景干净，高级商业插画海报质感。
远看是城市名字，近看名字里藏着一座城。禁止拼贴感、禁止灰蒙蒙、禁止水印。
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城市名称：敦煌Generate a 16:9 horizontal city visual poster themed 'Dunhuang'. The main body of the image is a set of large Chinese characters for the city name, with a clear, upright, and elegant font using a Chinese character mask/cutout/transparent window effect. Do not turn the text into 3D architectural letters or deform the strokes. First, generate a unified, continuous, and complete long scroll of the city landscape, then use the entire set of Chinese characters as a mask to crop this landscape. Regardless of how many characters the city name has, all characters must collectively display the same main city scene, rather than each character having an independent scene. The main landmark should appear only once, with unified perspective, light source, and color. A small amount of line-drawing decorations or auxiliary elements matching the city's temperament can be added around the text, but must be restrained. The overall color is bright and clear with moderate to high saturation, a clean background, and a high-end commercial illustration poster texture. From a distance, it is the city name; up close, a city is hidden within the name. No collage feel, no gray tones, no watermarks. City Name: Dunhuang
