html, body, #root { min-height: 100%; margin: 0; }
.boot-loading, .boot-failed {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  padding: 24px;
  color: #123b5d;
  background: #f4f7fb;
  font: 16px/1.6 "Microsoft YaHei", Arial, sans-serif;
}
.boot-failed-card {
  width: min(520px, 100%);
  padding: 32px;
  border: 1px solid #d7e2ec;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 12px 36px rgba(18, 59, 93, .12);
}
.boot-failed-card h1 { margin: 0 0 12px; font-size: 24px; }
.boot-failed-card p { margin: 0 0 12px; }
.boot-failed-card small { color: #66788a; overflow-wrap: anywhere; }