.powered-by {
  position: fixed;
  z-index: 100;
  left: 50%;
  bottom: max(.75rem, env(safe-area-inset-bottom));
  display: inline-flex;
  min-height: 2.5rem;
  align-items: center;
  gap: .25rem;
  border: 1px solid #d7dee8;
  border-radius: .4rem;
  padding: .55rem .75rem;
  transform: translateX(-50%);
  color: #475569;
  background: rgba(255, 255, 255, .82);
  box-shadow: 0 2px 8px rgba(15, 23, 42, .18);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  font-size: .75rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.powered-by:hover {
  background: rgba(248, 250, 252, .9);
}

.powered-by-brand {
  color: #da1a21;
  font-family: "Brush Script MT", "Segoe Script", "URW Chancery L", cursive;
  font-size: 1.05rem;
  font-style: italic;
  font-weight: 700;
}

.powered-by:focus-visible {
  outline: 3px solid rgba(218, 26, 33, .35);
  outline-offset: 2px;
}