/* 多语言切换控件 */
.lang-switcher {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
}

.lang-btn {
  background: rgba(255,255,255,0.9);
  border: 1px solid #ddd;
  border-radius: 16px;
  padding: 8px 15px;
  margin: 5px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.lang-btn:hover {
  background: #2196F3;
  color: white;
  transform: translateY(-2px);
}

.lang-loading {
  position: relative;
  padding-right: 35px;
}

.lang-loading::after {
  content: '';
  position: absolute;
  right: 10px;
  top: 50%;
  width: 12px;
  height: 12px;
  border: 2px solid #fff;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
  transform: translateY(-50%);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 768px) {
  .lang-switcher {
    top: 10px;
    right: 10px;
  }
  .lang-btn {
    padding: 6px 12px;
    font-size: 0.9em;
  }
}