{
  "name": "Spring Designer — 弹簧设计计算",
  "short_name": "SpringD",
  "description": "Free offline spring design suite: 17 types, 200 grades, tolerance, fatigue, G-code & CAD export.",
  "start_url": "./index.html",
  "display": "standalone",
  "background_color": "#0f172a",
  "theme_color": "#0f766e",
  "lang": "zh",
  "icons": [
    { "src": "icons/spring-icon.svg", "sizes": "any", "type": "image/svg+xml", "purpose": "any" }
  ]
}