大学讲座系列海报：阈值

生成一张 4:5 竖版「大学讲座系列海报：阈值」案例图，所属分类为「海报设计」。新闻灰 B1 海报：巨大黑色板衬 THRESHOLDS 边缘被裁，下方两栏讲座表，旋转红色标注块。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 bold academic lecture series poster for a fictional public-humanities programme titled "Thresholds". Vertical B1 format on warm newsprint-grey stock. Composition splits at the golden ratio: the upper two thirds is dominated by an enormous black slab serif word "THRESHOLDS" set in 380pt, letters touching the page edges and slightly clipped on the left and right, suggesting a doorframe. The lower third is a clean two-column information layout. Left column lists six lectures with date, speaker (fictional), and topic, e.g. "03.02 — Dr. Iona Marsh — Borders of attention", "03.16 — Prof. Hadi Karam — Thresholds of pain", in 12pt monospaced type. Right column holds a short paragraph in 14pt serif explaining the series, ending with the line "Free and open. No registration required." A small red square sits in the top-right corner with the host institution shorthand "DEPT. OF COMPARATIVE STUDIES — SPRING 2026" rotated ninety degrees, white text. Palette: newsprint grey D7D2C5, ink black 111111, signal red C8302B. No photography, all type and shape.