.app-return-bar {
  position: fixed;
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  left: max(12px, env(safe-area-inset-left));
  z-index: 9999;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 8px;
  border: 1px solid rgba(124, 232, 255, 0.24);
  border-radius: 12px;
  background: rgba(6, 19, 27, 0.94);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(18px);
}

.app-return-bar a,
.app-return-bar button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 12px;
  color: #ffffff;
  border: 1px solid rgba(124, 232, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  font: 900 15px/1.2 "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  text-decoration: none;
}

.app-return-bar a {
  background: linear-gradient(135deg, #12add7 0%, #0867b7 72%, #06131b 100%);
}

.has-app-return-bar {
  padding-bottom: 78px;
}

@media (min-width: 720px) {
  .app-return-bar {
    left: auto;
    width: 360px;
  }
}