Prompt:

Vertical 9:16 roll-up banner, high contrast black and blood red horror style. Top huge blood red bold text "密室逃脱" with dripping blood effect on font edges. Middle main scene: abandoned middle school gate in dark, gray official seal with dark red blood handprint on it, yellowed old graduation photo leaning against the wall next to the gate, semi-transparent shadow of a girl in white dress in the middle of the photo. Background blood-red overcast sky, pale white moon hanging above the school building. Upper-middle position bold white text: "你当年的秘密，她还记得". Below it smaller white text: "少年主题密室逃脱 · 惊悚开启". All key information in upper and middle area, bottom is completely empty to avoid being blocked when printed as roll-up banner. High contrast, dramatic composition, strong visual impact.