.j-message {
  position: fixed;
  top: -50px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 20px;
  border-radius: 4px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 9999;
  font-size: 16px;
}

.j-message.show {
  top: 20px;
  opacity: 1;
}

.j-message-success {
  background-color: #f0f9eb;
  border: 1px solid #e1f3d8;
  color: #67c23a;
}

.j-message-info {
  background-color: #f4f4f5;
  border: 1px solid #e9e9eb;
  color: #909399;
}

.j-message-warning {
  background-color: #fdf6ec;
  border: 1px solid #faecd8;
  color: #e6a23c;
}

.j-message-error {
  background-color: #fef0f0;
  border: 1px solid #fde2e2;
  color: #f56c6c;
}