光谱未来设计周海报

A finished vertical bilingual design festival poster set in a dark gallery, featuring a monumental translucent glass ribbon sculpture refracting cyan, violet, coral and amber light. Render the exact headline "光谱未来 · SPECTRUM FUTURES", supporting lines "SHANGHAI DESIGN WEEK" and "08—14 OCT 2026", and footer "WEST BUND ART CENTER". Cinematic photorealism, refined cultural-poster typography, polished black floor reflections, clear hierarchy and no extra text.