{
  "schemaVersion": 2,
  "sourceKind": "structured-spec",
  "confidence": "high",
  "slug": "countdown",
  "name": "倒计时 Countdown",
  "semanticTypeCandidates": [
    "countdown",
    "timer"
  ],
  "variantDimensions": [
    {
      "name": "unit",
      "values": [
        "day",
        "hour",
        "minute",
        "second"
      ]
    },
    {
      "name": "size",
      "values": [
        "20px",
        "26px",
        "32px"
      ]
    }
  ],
  "representativeVariants": [
    {
      "unit": "day",
      "size": "32px",
      "label": "天/时/分/秒完整显示"
    },
    {
      "unit": "minute",
      "size": "26px",
      "label": "分/秒显示"
    },
    {
      "unit": "second",
      "size": "20px",
      "label": "秒级显示"
    }
  ],
  "anatomy": {
    "digit": "数字：使用 DIN 字体，字号 20–32px",
    "separator": "时间单位分隔符冒号，颜色次要文字",
    "callback": "结束时触发回调"
  },
  "structurePatterns": {
    "fontFamily": "DIN",
    "fontSize": "20-32px",
    "separator": "冒号（次要文字色）"
  },
  "usageHints": [
    "用于秒杀、验证码、会议开始",
    "数字使用 DIN 字体，字号 20–32px",
    "时间单位分隔符冒号，颜色次要文字",
    "支持天/时/分/秒显示，结束时触发回调"
  ],
  "doNotInvent": [
    "数字卡片的背景块样式"
  ],
  "unknowns": [
    "触发回调后的替换内容",
    "是否补零的显示约定"
  ]
}