Late-Night Bookshop Poster

Create an original finished bookshop event poster. A single open book drawn as two luminous lemon-yellow windows floats against deep midnight blue; a tiny staircase grows naturally from its central fold. Flat paper-cut geometry with visible paper fibers and one warm orange accent. Exact large Chinese title: 凌晨书店. Exact secondary line: OPEN LATE, READ SLOW. Exact small footer: 22:00 — 02:00. Beautiful restrained typography integrated into large negative space; readable Chinese, no extra lettering, no scene mockup. Create exactly one finished image, aspect ratio 3:4. No collage or contact sheet. No watermark or signature. Keep all people original adults. Render at the native size available; do not add a frame.