{
  "name": "竖式演示器 - 集盒",
  "short_name": "竖式演示器",
  "description": "加减乘除竖式演示：输入或随机生成算式，逐位、逐层展示进位、借位、部分积与试商过程，把「老师写在黑板上的那几步」完整还原出来，帮孩子看懂为什么这样算。数据纯本地、不上传。",
  "lang": "zh-CN",
  "dir": "ltr",
  "start_url": "/tool/column-arithmetic",
  "scope": "/",
  "display": "standalone",
  "display_override": [
    "standalone",
    "minimal-ui"
  ],
  "orientation": "portrait",
  "background_color": "#007AFF",
  "theme_color": "#007AFF",
  "categories": [
    "utilities",
    "productivity"
  ],
  "icons": [
    {
      "src": "/icons/icon-192.png",
      "sizes": "192x192",
      "type": "image/png",
      "purpose": "any"
    },
    {
      "src": "/icons/icon-512.png",
      "sizes": "512x512",
      "type": "image/png",
      "purpose": "any"
    },
    {
      "src": "/icons/icon-maskable-512.png",
      "sizes": "512x512",
      "type": "image/png",
      "purpose": "maskable"
    }
  ]
}