{
  "name": "退改签助手 · 机票退改签手续费计算器",
  "short_name": "退改签助手",
  "description": "输入票面价与起飞时间，按各航司官网公示的退票费率，算出退票能拿回多少、手续费多少、该不该现在退。含国航、南航、东航、上航、春秋、海航、长龙 7 家航司完整费率表，不代办、不收费、不预测航班。",
  "id": "/",
  "start_url": "/",
  "scope": "/",
  "display": "standalone",
  "orientation": "portrait",
  "background_color": "#F3F5F8",
  "theme_color": "#12508C",
  "lang": "zh-CN",
  "dir": "ltr",
  "categories": ["utilities", "travel"],
  "icons": [
    { "src": "icon-192.png",           "sizes": "192x192", "type": "image/png", "purpose": "any" },
    { "src": "icon-512.png",           "sizes": "512x512", "type": "image/png", "purpose": "any" },
    { "src": "icon-maskable-512.png",  "sizes": "512x512", "type": "image/png", "purpose": "maskable" }
  ]
}