{
  "taskId": "expansion-048",
  "slug": "desk-lamp-one-joint-tilt",
  "language": "zh",
  "mode": "image-to-video",
  "modelId": "MiniMax-H3",
  "evidenceClass": "original-practice-method-not-model-tested",
  "input": {
    "path": "/learning-assets/pseo-expansion70-20261014/desk-lamp-one-joint-tilt/first-frame.png",
    "editableSource": "/learning-assets/pseo-expansion70-20261014/desk-lamp-one-joint-tilt/first-frame.svg",
    "role": "first_frame",
    "sourceType": "original-illustration"
  },
  "intent": {
    "cluster": "Historical product motion and image-to-video prompt family",
    "historicalQueries": [
      "minimax h3 image to video",
      "minimax h3提示词模板",
      "minimax h3 prompt guide"
    ],
    "evidenceRef": "docs/research/pseo-keyword-gap-2026-10-05/evidence/bing-live-keywords.csv",
    "distinctValue": "A desk-lamp head tilts around one visible neck joint while base, stem and cable stay fixed; the checklist isolates pivot drift from a light-beam change.",
    "existingOwnerBoundary": [
      {
        "path": "/blog/product-shape-consistency-video",
        "difference": "The broad structure tutorial covers parts; this package supplies a visible one-joint lamp and tests which component rotates about which stationary pivot."
      },
      {
        "path": "/blog/product-video-shot-list",
        "difference": "The downloadable task specifies one head adjustment, not a sequence of lighting or product-launch shots."
      }
    ],
    "demandClass": "historical-parent-query; exact long-tail demand unmeasured"
  },
  "title": "台灯单关节俯仰：灯头绕支点轻转",
  "description": "只调整灯头角度，保持颈部关节连接和底座落桌。将转轴位置与灯罩角度分开验收。",
  "goal": "让灯头绕可见颈部关节向下小幅转动一次。原创机械风格插画用于规划，不是H3已测动作，也不是台灯工程模型。",
  "preparation": [
    "输入应能看清立杆与灯罩之间唯一的颈部支点。配套灯使用简单单关节，避免多段连杆机制。",
    "保留完整底座和一小段电线，便于发现整体抬升或滑动。",
    "灯罩只小幅俯仰，不要求露出精细的隐藏灯泡或内部铰链。",
    "第一轮保持台灯关闭。移动的光斑可能分散注意，遮住关节脱离或灯罩形变。"
  ],
  "prompt": "从上传的关闭状态台灯图开始。底座平放桌面，立杆与可见电线固定。只有灯头绕可见圆形颈部关节轻轻向下转动一次。支点始终连接立杆同一顶部位置，灯罩作为一个硬质整体运动，不弯曲、不从铰链滑脱。角度改变时灯罩开口与边缘保持连贯。到适度向下角度后停住。台灯不点亮，环境光和机位固定。不伸长灯臂，不抬底座，不新增关节或电线。",
  "steps": [
    {
      "title": "指定唯一可动组件",
      "body": "把灯罩与短连接件写成灯头组件，把立杆、底座和电线写成固定部件，不笼统要求整灯弯腰。"
    },
    {
      "title": "找到转动中心",
      "body": "先在图里定位圆形关节。它与立杆的连接应固定，灯罩围绕它转动，不能平移穿过杆子。"
    },
    {
      "title": "检查半途姿态",
      "body": "在俯仰中段对比灯罩长度、开口和连接件。开口的正常透视变化可以接受，灯罩拉长、双边缘或新长出肘节则不通过。"
    },
    {
      "title": "先验收未亮灯终点",
      "body": "先检查关闭状态的结尾。支点通过后可另做照明研究；本练习以一次相连灯头调整结束。"
    }
  ],
  "acceptance": [
    "底座持续平贴桌面。",
    "立杆与可见电线固定。",
    "始终只有一个可见颈部关节，没有新增铰链。",
    "灯头绕该关节转动，没有从关节滑走。",
    "连接件持续连接灯罩与立杆原位置。",
    "灯罩是完整形状，边缘连续。",
    "灯头只向下转一次并停住，台灯没有点亮。"
  ],
  "troubleshooting": [
    {
      "symptom": "整个灯体弯曲或倾倒",
      "change": "只修改职责，把立杆与底座固定，保留小幅灯头俯仰。"
    },
    {
      "symptom": "多长出一个肘节",
      "change": "只将关节描述改成现有唯一圆形颈部支点，去掉多段活动臂措辞。"
    },
    {
      "symptom": "灯罩从杆子滑脱",
      "change": "只减小转动幅度，在半途姿态重新检查连接件。"
    },
    {
      "symptom": "灯亮起后看不清关节",
      "change": "只将照明改成环境光固定、台灯关闭，其余动作保持一致。"
    }
  ],
  "ending": "结尾底座平放，灯罩停在新角度。保留转动前、中、后的支点近景；漂亮光束不能代替完整连接。",
  "assetCaption": "原创关闭状态台灯输入，唯一圆形支点和稳定底座清楚可见；这是机构插画练习，不是生成或测量演示。"
}