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请为【城市名】创作一张高完成度、高审美、适合系列化发布的「【城市名】十二时辰」主题竖版海报。

【核心定位】 这不是普通旅游拼图，也不是单张风景海报，而是一张具有“时间叙事感、城市识别度、系列封面感、杂志专题感”的城市主题拼贴海报。整体要像一个成熟内容栏目或文旅视觉系列中的标准主海报，画面精致、统一、清晰、具有传播感。

【画幅要求】

• 固定为竖版海报构图
• 比例建议为 3:4
• 要有“大海报感”和高分辨率质感
• 适合在移动端浏览，也适合做内容封面和系列发布图

【版式结构】 整张海报必须由 12 张图片组成，采用固定的 3 列 × 4 行结构排布，共 12 个画面单元，形成清晰的拼贴网格。每个小画面既要相对独立、具有观赏性，又必须与整体保持统一，不能像杂乱截图拼接。

【主题逻辑】 海报主题为“【城市名】十二时辰”。12 张图需要围绕同一座城市展开，并形成从日出到日落、再到夜幕降临的完整时间线，体现一天之内不同时间段的城市气质变化。画面要有明显的时间推进感，而不是随机摆放 12 张城市风景。

【内容要求】

1. 必须包含【城市名】最具代表性的重点地标、城市景观或标志性场景。
2. 地标应自然分布在 12 个画面中，不要机械重复，也不要每格都只拍同一个建筑。
3. 场景内容可包含：城市天际线、地标建筑、街区、人文空间、桥梁、水域、公园、历史建筑、夜景、城市生活氛围等。
4. 不同时间段应有不同光线和氛围变化，例如：晨曦、清晨、上午、正午、午后、傍晚、日落、蓝调时刻、夜幕初上、城市夜景。
5. 整体应体现同一城市在一天之中的流动感、节奏感和层次感。

【视觉风格】

• 整体以真实摄影感、文旅专题感、城市杂志感为主
• 具有统一调色和系列感
• 画面精致、干净、有秩序
• 兼具高级感、纪录片气质和传播封面属性
• 可以有轻微电影感，但不要过度修饰到失真
• 每个小画面都要漂亮，但更重要的是整体统一

【色彩与光影】

• 整体色彩要随时间线自然变化，从晨光到白天，从傍晚到夜色，形成连续的色温变化
• 允许出现日出暖金、白天清透、黄昏橙金、入夜蓝调、夜景暖灯等变化
• 但整体后期色调仍需统一，不能每格像不同滤镜
• 强调天空、水面、建筑灯光、城市层次与空气感

【标题设计】 海报主标题为：「【城市名】十二时辰」 要求：

1. 标题必须清晰可读，具有系列主视觉作用。
2. 标题与图片之间要有良好的视觉平衡，不能简单粗暴地在文字后面压一整块黑色遮罩。
3. 需要通过更高级的方式处理文字可读性，例如：合理留白、局部暗化、柔和渐变、轻微虚化、光影避让、半透明细腻衬底，或让标题落在更适合阅读的位置。
4. 标题既要突出，又不能破坏底图整体美感。
5. 可搭配小面积副标题、印章、时间标签或轻装饰元素，但不宜过多。

【排版与视觉重心】

• 12 格拼贴是主体结构
• 标题是主视觉锚点
• 需要重新组织构图，使文字与拼贴内容形成平衡，而不是生硬覆盖
• 整体阅读逻辑应清晰：先看到标题，再浏览 12 个时间切片，再感受整座城市的一日变化
• 要有明确的海报感，而不是普通拼图截图

【质量要求】

• 画面必须整洁、统一、高级、有设计感
• 12 张图片之间既有差异，也有一致性
• 地标清晰，城市辨识度高
• 时间线明确，主题鲜明
• 标题排版成熟自然
• 避免杂乱、避免拼贴失控、避免文字压图生硬、避免低质旅游宣传图感

【可替换字段】 【城市名】= 用户指定城市 【风格倾向】= 文旅感 / 杂志感 / 纪录片感 / 都市高级感 / 历史人文感 【主色气质】= 清晨淡金 / 清透蓝绿 / 黄昏橙金 / 夜幕深蓝 / 城市霓虹等 【标题风格】= 中文书法感 / 现代标题字 / 文艺杂志字 / 城市专题字 【副元素】= 小印章 / 小标签 / 时序标记 / 极简副标题

如果用户只输入城市名，请自动理解并补全：

• 该城市最具代表性的地标
• 最适合表现的一天时间线
• 最能体现城市气质的典型场景
• 最合理的光影与色彩变化

Please create a high-completion, high-aesthetic, suitable-for-series-release vertical poster themed '【City Name】 Twelve Shichen (Twelve Hours)' for 【City Name】.

【Core Positioning】 This is not an ordinary travel collage, nor a single landscape poster, but a city-themed collage poster with a 'sense of time narrative, city recognition, series cover feel, and magazine feature feel'. The overall look should be like a standard main poster in a mature content column or cultural tourism visual series, with exquisite, unified, clear, and viral images.

【Format Requirements】

• Fixed vertical poster composition
• Aspect ratio recommended as 3:4
• Must have a 'large poster feel' and high-resolution texture
• Suitable for mobile browsing, as well as for content covers and series release images

【Layout Structure】 The entire poster must consist of 12 images, using a fixed 3-column × 4-row layout structure, totaling 12 visual units, forming a clear collage grid. Each small image should be relatively independent and visually appealing, but must maintain unity with the whole, not looking like a messy collage of screenshots.

【Theme Logic】 The poster theme is '【City Name】 Twelve Shichen'. The 12 images need to revolve around the same city, forming a complete timeline from sunrise to sunset, and then to the falling of night, reflecting the changes in the city's temperament during different periods of the day. The images must have a clear sense of time progression, rather than randomly placing 12 city landscapes.

【Content Requirements】

1. Must include the most representative key landmarks, cityscapes, or iconic scenes of 【City Name】.
2. Landmarks should be naturally distributed across the 12 images, without mechanical repetition, and do not just photograph the same building in every grid.
3. Scene content can include: city skyline, landmark buildings, blocks, cultural spaces, bridges, water areas, parks, historical buildings, night views, city life atmosphere, etc.
4. Different time periods should have different lighting and atmosphere changes, for example: dawn, early morning, morning, noon, afternoon, evening, sunset, blue hour, early night, city night view.
5. The overall should reflect the fluidity, rhythm, and layering of the same city within a single day.

【Visual Style】

• Overall mainly features a sense of realistic photography, cultural tourism feature feel, and city magazine feel
• Has unified color grading and a sense of series
• Images are exquisite, clean, and orderly
• Combines a premium feel, documentary temperament, and viral cover attributes
• Can have a slight cinematic feel, but do not over-retouch to the point of distortion
• Every small image must be beautiful, but more importantly, the overall unity

【Color and Lighting】

• The overall color should change naturally with the timeline, from morning light to day, from evening to night, forming a continuous color temperature change
• Changes such as sunrise warm gold, daytime clear, dusk orange gold, nightfall blue tone, and night view warm lights are allowed
• But the overall post-production tone still needs to be unified, and each grid cannot look like a different filter
• Emphasize the sky, water surface, building lights, city layers, and sense of air

【Title Design】 The main title of the poster is: '【City Name】 Twelve Shichen' Requirements:

1. The title must be clearly readable, serving as the series' main visual.
2. There must be good visual balance between the title and the images, and a whole black mask cannot be simply and roughly pressed behind the text.
3. Text readability needs to be handled in a more premium way, for example: reasonable white space, local darkening, soft gradients, slight blurring, light and shadow avoidance, semi-transparent delicate backing, or letting the title fall in a position more suitable for reading.
4. The title must be prominent, but cannot destroy the overall aesthetic of the base image.
5. Can be paired with small-area subtitles, seals, time tags, or light decorative elements, but not too many.

【Layout and Visual Center of Gravity】

• The 12-grid collage is the main structure
• The title is the main visual anchor
• Need to reorganize the composition so that the text and collage content form a balance, rather than a rigid overlay
• The overall reading logic should be clear: see the title first, then browse the 12 time slices, and then feel the one-day changes of the whole city
• Must have a clear poster feel, rather than an ordinary puzzle screenshot

【Quality Requirements】

• Images must be clean, unified, premium, and design-oriented
• There must be both differences and consistency among the 12 images
• Clear landmarks, high city recognition
• Clear timeline, distinct theme
• Mature and natural title layout
• Avoid clutter, avoid out-of-control collage, avoid rigid text-over-image, avoid low-quality tourism promotional image feel

【Replaceable Fields】 【City Name】 = User-specified city 【Style Tendency】 = Cultural tourism feel / Magazine feel / Documentary feel / Urban premium feel / Historical and humanistic feel 【Main Color Temperament】 = Morning pale gold / Clear blue-green / Dusk orange gold / Nightfall deep blue / City neon, etc. 【Title Style】 = Chinese calligraphy feel / Modern title font / Literary magazine font / City feature font 【Sub-elements】 = Small seal / Small tag / Time sequence mark / Minimalist subtitle

If the user only inputs a city name, please automatically understand and complete:

• The most representative landmarks of the city
• The most suitable one-day timeline to express
• Typical scenes that best reflect the city's temperament
• The most reasonable lighting and color changes