萤之祭日本祭典海报

生成一张 4:5 竖版「萤之祭日本祭典海报」案例图，所属分类为「海报设计」。risograph 竖版海报：黄昏狭高鸟居，靛蓝夜空满黄萤，蓝色河线，大字书法 蛍祭り。画面需要完整呈现上述主体、构图、配色、材质、光线和整体风格；可见文字以自然简体中文为主，必要的技术缩写、代码、变量名、学术符号、单位、拉丁物种名或装饰性外文可保留。

A vertical festival poster for a fictional summer matsuri called "Hotaru-Matsuri" hosted by a small mountain village. B2 portrait format printed as if risograph in three colours on warm off-white paper. The composition shows a single tall, narrow wooden torii gate seen from below at dusk, drawn with confident flat shapes and a thin black ink outline. Behind it, a deep indigo sky is dotted with thirty or so glowing yellow fireflies, each rendered as a slightly imperfect dot with a soft halo. A river suggested by three horizontal blue lines runs across the lower fifth of the page. To the right of the torii, vertical Japanese calligraphy reads "蛍祭り" in confident black brushstrokes, large. Below the river, in a horizontal band, small Japanese and English text reads "七月二十日 — 山影村 — 18:00 開始" and "Hotaru-Matsuri — Yamakage Village — July 20". A small round logo of a firefly inside a circle sits in the lower-right corner. Paper grain and slight ink misregistration visible. Palette: paper F4EFE3, indigo 1F2C5A, firefly yellow E8C656, river blue 4A86A4.