{
  "title": "展厅视频字幕在远处看不清，怎样用观看距离做样张验收",
  "evidence_type": "synthetic-not-field-measurement",
  "date": "2026-10-23",
  "required_deliverable": "实际屏幕、观看位置、字号与对比度组合的样张记录",
  "fields": [
    "variant",
    "text",
    "font_px",
    "screen_mm",
    "view_distance_m",
    "angle_deg",
    "background",
    "participant_condition",
    "result"
  ],
  "sample_rows": [
    [
      "A",
      "请在12号展柜查看青铜器",
      48,
      "pending",
      4,
      0,
      "transparent",
      "",
      "not-tested"
    ],
    [
      "B",
      "请在12号展柜查看青铜器",
      60,
      "pending",
      4,
      0,
      "dark-panel",
      "",
      "not-tested"
    ]
  ],
  "unmeasured": "未采集实体屏幕样张和真实参与者结果；字号仅是A/B测试输入，不是推荐标准或实测结论。"
}