@media (max-width: 680px) {
  body { background: #fff; }
  .page { display: block; min-height: 100dvh; padding: 0; }
  .download-card { width: 100%; min-height: 100dvh; padding: max(16px, env(safe-area-inset-top)) 18px max(24px, env(safe-area-inset-bottom)); border: 0; border-radius: 0; background: #fff; box-shadow: none; backdrop-filter: none; -webkit-backdrop-filter: none; }
  .topbar { min-height: 38px; }
  .download-layout { display: block; margin-top: 0; }
  .download-main { width: 100%; max-width: 100%; overflow: hidden; }
  .desktop-qr { display: none; }
  .app-logo { width: 88px; height: 88px; margin: 20px auto 12px; border-radius: 21px; }
  h1 { font-size: 34px; }
  .tagline { font-size: 15px; }
  .status { margin: 14px 0 10px; }
  .primary { min-height: 52px; border-radius: 14px; }
  .fallback-row { flex-wrap: wrap; overflow-wrap: anywhere; }
  .stores { margin-top: 18px; }
  .store-list { grid-template-columns: 1fr 1fr; }
  .store-link { min-height: 46px; }
  .release-info { margin-top: 20px; }
  .wechat-guide { top: max(8px, env(safe-area-inset-top)); left: 10px; right: 10px; }
  .topbar > * { min-width: 0; }
}

@media (max-width: 380px) {
  .download-card { padding-right: 14px; padding-left: 14px; }
  .mini-brand span { display: none; }
  .language { max-width: 125px; }
  .store-list { grid-template-columns: 1fr; }
}