在带有纹理的手工水彩纸上，创作一幅 3:4 纵向水彩城市速写旅行海报。

Create a 3:4 vertical watercolor urban sketch travel poster on textured handmade watercolor paper. City input: [CITY NAME] Create a romantic everyday scene reflecting the real architecture, landmarks, street life, climate, and cultural mood of [CITY NAME]. Use recognizable city-specific elements such as local buildings, cafes, balconies, canals, bridges, trams, towers, rooftops, tiles, waterfronts, street furniture, plants, or signs. Avoid generic European scenery or incorrect landmarks. Main scene: Show two lovers as the main subjects, placed slightly below center. They may be walking, sitting at an outdoor cafe, sharing iced coffee, standing near the water, looking at a view, or gently holding hands. Their pose should feel natural, affectionate, quiet, and unposed. Do not show a single person. Characters: Dress the couple in stylish casual summer clothing suited to [CITY NAME]: linen shirts, light cardigans, relaxed trousers, summer dresses, sneakers, sandals, sunglasses, crossbody bags, tote bags, cameras, pastries, or iced drinks. Use mostly white, pale blue, aqua, and soft gray-blue clothing with one or two small lemon-yellow accents. Add gentle wind movement to hair and loose fabric. Composition: Use a clean vertical poster layout with large negative space and an airy editorial feel. Keep the couple small to medium in scale, framed by city-specific architecture or scenery. Place buildings and landmarks in the background or along the sides, softly blended into the paper texture. Keep the upper half bright and open, with the upper right reserved for typography. Typography: In the upper right corner, add the city name in elegant italic English lettering: "[CITY NAME]" Directly below, add one short poetic English sentence matching the city's fresh summer mood. Use delicate soft cobalt, gray-blue, or muted navy lettering. Keep it minimal, readable, and naturally integrated into the paper. Color direction: Use a refreshing blue-and-yellow summer palette: 75% cool blues and blue-grays: sky blue, cyan, pale aqua, powder blue, faded turquoise, soft blue-gray, selective cobalt. 15% clean white and warm off-white paper highlights. 10% pale lemon yellow, soft butter yellow, sunlit cream, or light golden accents. Blue should dominate while yellow adds warmth and visual rhythm. Use yellow only as accents in awnings, window light, flowers, umbrellas, pastries, signs, clothing details, drink labels, or sunlit building edges. Avoid an all-blue flat background. Watercolor technique: Use translucent washes, soft blue bleeding, subtle pigment granulation, wet-on-dry textures, gentle brush blooms, pale shadows, visible handmade paper texture, minimal splashes, and delicate reflections where appropriate. Yellow washes should feel like light touching paper. Drawing detail: Use delicate thin ink line art with slightly imperfect hand-drawn lines. Add refined urban sketch details: windows, shutters, balconies, streetlamps, cafe chairs, paving stones, railings, plants, clothing folds, hair strands, hands, shoes, bags, cups, signs, and soft ground marks. Keep faces softly suggested, not realistic. Mood and quality: Minimalist watercolor urban sketch, romantic summer travel poster, quiet love story, city-specific atmosphere, breezy blue palette with lemon-yellow highlights, elegant fashion illustration, cozy slice-of-life, Japanese-inspired softness, premium editorial look, calm pastel mood, soft natural lighting, clean background, poster-ready, 8K. Negative prompt: single person, generic city, incorrect landmarks, all-blue background, monochrome blue, lifeless colors, yellow-dominant, orange-heavy, brown-dominant, dark vintage, muddy beige, neon colors, oversaturated colors, photorealistic, 3D render, heavy outlines, harsh shadows, crowded street, cluttered background, realistic faces, stiff pose, awkward anatomy, glossy texture, bold typography.

在带有纹理的手工水彩纸上，创作一幅 3:4 纵向水彩城市速写旅行海报。 城市输入： [CITY NAME] 创作一个浪漫的日常场景，反映 [CITY NAME] 真实的建筑、地标、街头生活、气候与文化氛围。使用可识别的城市专属元素，例如本地建筑、咖啡馆、阳台、运河、桥梁、电车、塔楼、屋顶、瓦片、滨水区、街道家具、植物或招牌。避免泛化的欧洲风景或错误的地标。 主场景： 以一对恋人作为主角，位置略低于画面中心。他们可以正在散步、坐在露天咖啡馆、共享冰咖啡、站在水边、欣赏风景，或轻轻牵手。他们的姿态应自然、深情、安静、不刻意摆拍。不要只出现一个人。 人物： 为这对情侣搭配适合 [CITY NAME] 的时髦休闲夏日服装：亚麻衬衫、轻薄开衫、休闲长裤、夏季连衣裙、运动鞋、凉鞋、墨镜、斜挎包、托特包、相机、糕点或冰饮。服装以白色、浅蓝、水蓝和柔和灰蓝为主，搭配一两处小面积的柠檬黄点缀。在头发与飘逸的衣料上加入轻微的风吹动感。 构图： 采用简洁的纵向海报版式，留出大面积负空间，营造通透的编辑式观感。情侣的体型保持中小尺寸，由城市特有的建筑或景观框景。将建筑与地标安排在背景或两侧，与纸张纹理自然柔和地融合。画面上半部分保持明亮开阔，右上角留给排版使用。 排版： 在右上角用优雅的意大利体英文字母写出城市名称： "[CITY NAME]" 在其正下方添加一句简短的诗意英文句子，呼应这座城市清新的夏日氛围。使用细腻柔和的钴蓝、灰蓝或低饱和的藏青色字迹。保持极简、可读，并与纸张自然融合。 色彩方向： 使用清新明快的蓝黄夏日配色： 75% 冷蓝与蓝灰：天蓝、青蓝、浅水蓝、粉蓝、淡褪的松石蓝、柔和蓝灰、点睛的钴蓝。 15% 纯净白与暖调米白纸张高光。 10% 浅柠檬黄、柔黄油色、日光奶油色或淡金色点缀。 蓝色应占主导，黄色则增添温暖与视觉节奏。黄色仅作为点缀使用，出现在雨棚、窗光、花朵、雨伞、糕点、招牌、服装细节、饮品标签或被阳光照亮的建筑边缘。避免出现通体纯蓝的扁平背景。 水彩技法： 使用透明水洗、柔和的蓝色晕染、细腻的颜料颗粒、纸干后湿画纹理、轻柔的笔触晕开、淡雅的阴影、可见的手工纸张纹理、最少量的飞溅以及恰到好处的细腻倒影。黄色水洗应如光线轻抚纸面般自然。 线条细节： 使用细腻的细墨线手绘，线条略带不完美的手绘感。添加精致的城市速写细节：窗户、百叶窗、阳台、街灯、咖啡椅、铺路石、栏杆、植物、衣褶、发丝、手部、鞋履、包袋、杯子、招牌以及柔和的地面痕迹。面部仅作柔和暗示，不追求写实。 氛围与品质： 极简水彩城市速写、浪漫夏日旅行海报、安静的恋爱故事、城市专属氛围、带有柠檬黄点缀的微风格蓝色调、优雅的时装插画、温馨的生活切片、日式柔和感、高端编辑级观感、宁静的粉彩情调、柔和的自然光、简洁背景、可直接作海报使用、8K。 负向提示词： single person, generic city, incorrect landmarks, all-blue background, monochrome blue, lifeless colors, yellow-dominant, orange-heavy, brown-dominant, dark vintage, muddy beige, neon colors, oversaturated colors, photorealistic, 3D render, heavy outlines, harsh shadows, crowded street, cluttered background, realistic faces, stiff pose, awkward anatomy, glossy texture, bold typography.