駅の下で、音を聴く。

高架下サウンドインスタレーション。目的を「認知・来場喚起」に固定し、価値・日時・行動の三段階で視線を設計。

IMAGE MASTER PROMPT

Create an original award-quality Japanese A4 portrait event flyer, 3:4, for awareness and foot traffic. DESIGN PURPOSE: make office workers notice a one-night public sound installation and remember its unusual location. Exact headline: 「駅の下で、音を聴く。」 Exact subheading: 「高架下サウンドインスタレーション」. Build a decisive three-level hierarchy: first a single enormous photographic arc of concrete viaduct shadow occupying the upper 55 percent, second the date 「11.14 FRI」 as a compact high-contrast block at the visual hinge, third small venue/access/admission details aligned on one baseline at bottom. One memorable visual idea only: a thin electric-blue waveform follows the architecture and terminates at the date. Black, concrete gray, warm white, electric blue. Tiny anonymous visitors from behind, faces not visible. Crisp contemporary cultural-institution art direction, purposeful asymmetry, excellent Japanese typesetting, strong scale contrast, print-safe margins. Every element must support discovery and remembrance. No real railway, city, organization, sponsor, logo, brand, celebrity, watermark, fake seal, jagged brush edges, torn paper, grunge, arbitrary corner decoration, generic Swiss blocks, blurred faces, malformed people or illegible filler.