/* 首次打开与初始化页面共用的见外加载画面。 */
body { margin: 0; }
#app .loading-placeholder {
  box-sizing: border-box;
  min-height: 100dvh;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: #f6f8fa;
  color: #233044;
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  text-align: center;
}
#app .loading-placeholder h1 { font-size: clamp(1.5rem, 5vw, 2.5rem); margin: 1rem 0; }
#app .loading-placeholder p { font-size: 1rem; line-height: 1.6; color: #596779; }
#app .loading-placeholder .err-l1 { color: #a32942; }
#app .loading-placeholder.still-not-loaded p.loading { display: none; }
#app .loading-placeholder.still-not-loaded .catastrophic-error { display: block !important; }