.page4 .fontbox {
  padding: 1em 1em 1em;
  margin: 20px 0 0;
  border-style: double;
  border-width: 3px;
  border-color: #ccc;
}
.page4 .fontbox-ttl01 {
  font-size: 16px;
  font-weight: bold;
  margin: 0 0 10px;
}
@media print, screen and (min-width: 768px) {
  .page4 .fontbox-ttl01 {
    font-size: 20px;
  }
}
.page4 .fontbox-ttl02 {
  font-size: 20px;
  color: #fff;
  font-weight: bold;
  line-height: 1.5;
  background: var(--color-mu07);
  padding: 0.25em 0.75em;
  margin: 0 0 10px;
  border-radius: 3px;
}
@media print, screen and (min-width: 768px) {
  .page4 .fontbox-ttl02 {
    font-size: 22px;
  }
}