.btn-square-so-popb {
  position: relative;
  display: inline-block;
  padding: 0.25em 0.5em;
  text-decoration: none;
  color: #FFF;
  background: #668ad8;/*色*/
  border-radius: 4px;/*角の丸み*/
  box-shadow: inset 0 2px 0 rgba(255,255,255,0.2), inset 0 -2px 0 rgba(0, 0, 0, 0.05);
  font-weight: bold;
  border: solid 2px #627295;/*線色*/
}

.btn-square-so-popb:active {
  /*押したとき*/
  box-shadow: 0 0 2px rgba(0, 0, 0, 0.30);
}

.btn-square-so-pop {
  position: relative;
  display: inline-block;
  padding: 0.25em 0.5em;
  text-decoration: none;
  color: #FFF;
  background: #fd9535;/*色*/
  border-radius: 4px;/*角の丸み*/
  box-shadow: inset 0 2px 0 rgba(255,255,255,0.2), inset 0 -2px 0 rgba(0, 0, 0, 0.05);
  font-weight: bold;
  border: solid 2px #d27d00;/*線色*/
}

.btn-square-so-pop:active {
  /*押したとき*/
  box-shadow: 0 0 2px rgba(0, 0, 0, 0.30);
}