.tips {
  padding-left: 10px;
  background-color: #bae2fc;
  border-left: 4px solid #3498db;
  color: #185d8a;
}
.success {
  padding-left: 10px;
  background-color: #caffe7;
  border-left: 4px solid #42b983;
  color: #286f4f;
}
.warning {
  padding-left: 10px;
  background-color: #fff7d0;
  border-left: 4px solid #e7c000;
  color: #8b7300;
}
.danger {
  padding-left: 10px;
  background-color: #ffe6e6;
  border-left: 4px solid #c00;
  color: #7a0000;
}