h3 {
  position: relative;
  padding: 0.6em;
  background: #e0edff;
}

h3:after {
  position: absolute;
  content: '';
  top: 100%;
  left: 30px;
  border: 15px solid transparent;
  border-top: 15px solid #e0edff;
  width: 0;
  height: 0;
}
h4 {
  position: relative;
  padding: 0.25em 0;
}
h4:after {
  content: "";
  display: block;
  height: 4px;
  background: -webkit-linear-gradient(to right, rgb(255, 186, 115), #ffb2b2);
  background: linear-gradient(to right, rgb(255, 186, 115), #ffb2b2);
}