复古大阪难波旅行海报

Goal: Create a retro illustrated travel poster promoting {argument name="destination" default="Namba, Osaka, Japan"}, with a clean Japanese tourism-board feel, warm nostalgia, and bold typography. Canvas: Vertical poster in a 9:16 ratio on warm off-white paper with subtle grain, thin cream border, and muted teal, navy, coral, peach, beige, and orange palette. Use crisp vector-like line art, flat shading, slight print texture, and no photorealism. Layout: Divide the poster into 4 stacked areas: 1) a top skyline illustration panel, 2) a centered Japanese quote line, 3) a large central canal street scene integrated with giant letters, and 4) a bottom information footer with logo. Top panel: Wide rectangular illustration of an Osaka city skyline at sunset. Center Tsutenkaku-style tower with a thin antenna and observation deck, surrounded by low-rise buildings, signs, power lines, and a dark train silhouette crossing the lower right. Sky fades from pale blue to peach with a few soft clouds. Quote text: Under the skyline, place handwritten coral Japanese text reading {argument name="quote" default="「そうだ、なんば、行こうよ。」"}. Keep it spacious and centered. Main illustration: Large bold uppercase word {argument name="main title" default="NAMBA"} dominates the middle, using thick condensed sans-serif block letters in dark navy with pale inner highlights and thin outlines. Inside and around the letters, show a lively Dotonbori-inspired canal street: neon signs, billboards, shop facades, pedestrian bridges, stairs on both sides, railings, lanterns, and a central canal receding in perspective. The canal contains exactly 3 visible boats: one small boat near the center-left foreground with 3 people, one larger boat at the lower right with 5 people, and one tiny distant boat near the bridge with 1 person. Include exactly 2 large vertical billboard characters/figures, one on the left and one on the right, both resembling stylized running sign figures. Include exactly 2 rows of round orange lanterns, one along each canal side. Add small silhouettes of pedestrians on the walkways. Footer text: At the bottom left, add a small location line: "OSAKA, JAPAN」 「NAMBA」". Below it, set a bold navy headline reading {argument name="footer headline" default="NAMBA — LET’S GO!"}. Under that, add the tagline {argument name="tagline" default="VIBRANT STREETS. INCREDIBLE FOOD. ENDLESS NEON ENERGY."}. Add three compact info lines: "ACCESS: Easy Access from Kansai Airport via Nankai Line", "LINES: Nankai Line · Kintetsu Line · Hanshin Line · Osaka Metro · JR Namba", and "SPOTS: Dotonbori · Glico Sign · Tsutenkaku · Kuromon Market · Namba Yasaka Shrine". Bottom-right logo: Include a simple red-orange paper lantern icon with navy cap and outline. Under it place Japanese hiragana "なんば" and small uppercase "NAMBA". Constraints: Keep all text legible, use the exact visible hierarchy with one skyline panel, one quote, one giant main word, one canal scene, and one footer. Avoid modern glossy effects, avoid extra logos, avoid photographic details, and preserve the retro Japanese travel poster aesthetic.

目标：创作一张复古插画风格的旅行海报，用于推广 {argument name="destination" default="日本大阪难波"}，营造简洁的日本旅游项目感、温暖的怀旧氛围以及醒目的排版。 画布：9:16 比例的竖向海报，采用带有细微颗粒感的暖米白色纸张，配有细奶油色边框，色调为柔和的青色、海军蓝、珊瑚色、桃色、米色和橙色。使用清晰的矢量风格线条、扁平阴影、轻微的印刷质感，避免写实感。 布局：将海报分为 4 个堆叠区域：1) 顶部天际线插画板块，2) 居中的日语引语行，3) 与巨大字母融为一体的大型中央运河街道场景，4) 带有 Logo 的底部信息页脚。 顶部板块：宽矩形插画，展示日落时分的大阪城市天际线。中心为通天阁风格的塔楼，带有细天线和观景台，周围环绕着低层建筑、招牌、电线，右下方有一列深色火车的剪影。天空从淡蓝色渐变至桃色，点缀着几朵柔和的云彩。 引语文字：在天际线下方，放置手写风格的珊瑚色日语文字 {argument name="quote" default="「そうだ、なんば、行こうよ。」"}。保持排版宽敞并居中。 主插画：中间由巨大的粗体大写单词 {argument name="main title" default="NAMBA"} 主导，使用深海军蓝色的加粗压缩无衬线字体，内部带有淡色高光和细轮廓。在字母内部及周围，展示生动的道顿堀风格运河街道：霓虹灯招牌、广告牌、店铺门面、人行天桥、两侧台阶、栏杆、灯笼，以及透视感十足的中央运河。运河中恰好包含 3 艘可见的船只：左中前景处有一艘载有 3 人的小船，右下方有一艘载有 5 人的较大船只，桥附近有一艘载有 1 人的远方小船。包含恰好 2 个大型垂直广告牌角色/人物，左右各一，均类似于风格化的奔跑招牌人物。包含恰好 2 排圆形橙色灯笼，运河两侧各一排。在步行道上添加行人的小剪影。 页脚文字：在左下角，添加一行小字位置信息："OSAKA, JAPAN」 「NAMBA"。下方设置一行粗体海军蓝标题 {argument name="footer headline" default="NAMBA — LET’S GO!"}。在其下方，添加标语 {argument name="tagline" default="VIBRANT STREETS. INCREDIBLE FOOD. ENDLESS NEON ENERGY."}。添加三行紧凑的信息行："ACCESS: Easy Access from Kansai Airport via Nankai Line"，"LINES: Nankai Line · Kintetsu Line · Hanshin Line · Osaka Metro · JR Namba"，以及 "SPOTS: Dotonbori · Glico Sign · Tsutenkaku · Kuromon Market · Namba Yasaka Shrine"。 右下角 Logo：包含一个简单的红橙色纸灯笼图标，配有海军蓝盖子和轮廓。下方放置日语平假名 "なんば" 和小写字母 "NAMBA"。 约束：保持所有文字清晰易读，使用明确的视觉层级，包含一个天际线板块、一个引语、一个巨大的主单词、一个运河场景和一个页脚。避免现代光泽效果，避免额外的 Logo，避免摄影细节，并保持复古日本旅行海报的美学风格。