.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #f0f2f5;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s;
}

.loading-content {
  text-align: center;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 4px solid #f0f2f5;
  border-top: 4px solid #007bff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 20px;
}

.loading-text {
  font-family: 'Segoe UI', sans-serif;
  font-size: 18px;
  color: #555;
  letter-spacing: 1px;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

/* 隐藏时的样式 */
.loading-hidden {
  opacity: 0;
  visibility: hidden;
}