Zen Minimalist Autumn Staircase Poster

Theme orientation: {argument name="theme" default="Oriental Zen minimalist poster"}
Style branch: {argument name="style" default="High-contrast seasonal type"}
Main subject: {argument name="subject" default="A figure slowly walking up long steps"}
Emotional motif: Clear autumn day, upward motion, vitality in stillness
Scene and imagery: Lemon yellow ginkgo leaves, dark blue staircase shadows, cool white walls, character silhouettes
Composition and space: Deep composition with long steps extending upwards, the figure in the lower-middle part, ginkgo leaves dotting the steps and white space areas
Color control: Cool white as the wall and background base, dark blue for step shadows and spatial layers, lemon yellow for ginkgo leaf accents, ink gray for character silhouettes; avoid overall yellowing
Light and texture: Bright natural light, light paper feel, clear edges, minimal grain
Aspect ratio: 9:16 
Additional requirements: The steps should be minimalist, ginkgo leaves few but striking, overall light and transparent feel

主题方向：{argument name="主题方向" default="东方禅意极简海报"}
风格分支：{argument name="风格分支" default="高对比节气型"}
主体内容：{argument name="主体内容" default="一位沿长阶缓慢向上走的人物"}
情绪母题：秋日清朗、向上、静中有生机
场景与意象：柠檬黄银杏叶、青黛蓝阶梯阴影、冷白墙面、人物剪影
构图与空间：纵深构图，长阶向上延伸，人物位于中下部，银杏叶点缀在台阶与留白区域
色彩控制：冷白作为墙面与背景基底，青黛蓝用于台阶阴影和空间层次，柠檬黄用于银杏叶点睛，墨灰用于人物轮廓；避免整图泛黄
光线与质感：明亮自然光，轻纸感，边缘清晰，少量颗粒
画幅比例：9:16 
补充要求：台阶要极简，银杏叶数量少但醒目，整体轻盈通透