{
  "title": "消失的校徽",
  "intro": "午休結束後，校慶展示櫃裡的校徽消失了。你能找出真相嗎？",
  "locations": {
    "1": {
      "name": "六年一班教室",
      "scene": "展示櫃半開，窗戶也沒有關好。",
      "evidence": {
        "id": "blue_fiber",
        "name": "窗框上的藍色纖維",
        "detail": "纖維顏色和清潔推車的布套相同。"
      }
    },
    "2": {
      "name": "操場司令台",
      "scene": "地面剛拖過，留下一道彎向圖書館的輪痕。",
      "evidence": {
        "id": "wheel_track",
        "name": "沾著亮粉的推車輪痕",
        "detail": "亮粉和展示櫃內的裝飾相同。"
      }
    },
    "3": {
      "name": "圖書館",
      "scene": "清潔推車停在書架旁，後方似乎有東西反光。",
      "requires": ["blue_fiber", "wheel_track"],
      "locked_text": "你看見推車，卻還不知道該檢查哪裡。也許要先找出它的移動路線。",
      "evidence": {
        "id": "badge",
        "name": "卡在推車後方的校徽",
        "detail": "校徽沒有損壞，背面黏著一小段藍色纖維。"
      }
    }
  },
  "conclusions": {
    "1": "有同學故意把校徽藏在圖書館",
    "2": "風吹起校徽，清潔推車不小心把它帶到圖書館",
    "3": "校徽從一開始就放在圖書館"
  },
  "correct_answer": "2",
  "success": "推理正確！風把校徽吹到布套上，推車經過教室後又將它帶到圖書館。這是一場意外。"
}