h2 {
  border-bottom: solid 3px #FFBF11;
  position: relative;
}

h2:after {
  position: absolute;
  content: " ";
  display: block;
  border-bottom: solid 3px #0099ff;
  bottom: -3px;
  width: 30%;
}

h3 {
  border-bottom: solid 3px  #ff3399;
  position: relative;
}

h3:after {
  position: absolute;
  content: " ";
  display: block;
  border-bottom: solid 3px #00cc99;
  bottom: -3px;
  width: 30%;
}

h4 {
  position: relative;
  border-top: solid 2px #80c8d1;
  border-bottom: solid 2px #80c8d1;
  background: #90EE90;
  line-height: 1.4;
  padding: 0.4em 0.5em;
  margin: 2em 0 0.5em;
}

h4:after {
  /*タブ*/
  position: absolute;
  font-family: "Font Awesome 5 Free",'Quicksand','Avenir','Arial',sans-serif;
  content: 'Q';
  background:  #33cc33;
  color: #fff;
  left: 0px;
  bottom: 100%;
  border-radius: 5px 5px 0 0;
  padding: 5px 7px 3px;
  font-size: 0.7em;
  line-height: 1;
  letter-spacing: 0.05em;
}

h5 {
  position: relative;
  color: black;
  background: #d0ecff;
  line-height: 1.4;
  padding: 0.25em 0.5em;
  margin: 2em 0 0.5em;
  border-radius: 0 5px 5px 5px;
}

h5:after {
  /*タブ*/
  position: absolute;
  font-family: "Font Awesome 5 Free",'Quicksand','Avenir','Arial',sans-serif;
  content: 'A';
  background: #2196F3;
  color: #fff;
  left: 0px;
  bottom: 100%;
  border-radius: 5px 5px 0 0;
  padding: 3px 7px 1px;
  font-size: 0.7em;
  line-height: 1;
  letter-spacing: 0.05em
}

h6 {
  position: relative;
  padding: 0.2em 0.5em;
  background: -webkit-linear-gradient(to right, rgb(255, 124, 111), #ffc994);
  background: linear-gradient(to right, rgb(255, 124, 111), #ffc994);
  color: black;
  font-weight: lighter;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.56);
}