{
  "name": "音阶跳转 · 唱名练习",
  "short_name": "音阶跳转",
  "description": "在低音3到高音5的范围内随机抽取两个音级，倒计时切换，练习唱名跳转与音准反应速度",
  "start_url": "./",
  "display": "standalone",
  "orientation": "portrait",
  "background_color": "#12202A",
  "theme_color": "#12202A",
  "icons": [
    { "src": "icon-192.png", "sizes": "192x192", "type": "image/png" },
    { "src": "icon-512.png", "sizes": "512x512", "type": "image/png", "purpose": "any maskable" }
  ]
}