.back-to-top,
.page-back-button {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 46px;
  padding: 0 15px;
  border: 1px solid rgba(72, 220, 198, 0.4);
  border-radius: 999px;
  color: #edf8f5;
  background: rgba(11, 21, 20, 0.92);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.35);
  font:
    700 14px/1 "Microsoft YaHei",
    "PingFang SC",
    system-ui,
    sans-serif;
  text-decoration: none;
  cursor: pointer;
  backdrop-filter: blur(14px);
}
.back-to-top:hover,
.page-back-button:hover {
  border-color: #48dcc6;
  transform: translateY(-2px);
}
.back-to-top {
  width: 46px;
  padding: 0;
  font-size: 20px;
}
@media (max-width: 560px) {
  .back-to-top,
  .page-back-button {
    right: 14px;
    bottom: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .back-to-top:hover,
  .page-back-button:hover {
    transform: none;
  }
}