.honbun h1 {
  display: block;
  margin: 0.67em 0; /* Webkit, Firefoxは、margin-before: 0.67em; margin-after: 0.67em; */
  font-size: 2em;
  font-weight: bold;
  page-break-after: avoid; /* IEのみ */
}

.honbun h2,
:match(article,aside,nav,section) h1 {
  display: block;
  margin: 0.83em 0; /* Webkit, Firefoxは、margin-before: 0.83em; margin-after: 0.83em; */
  font-size: 1.5em;
  font-weight: bold;
  page-break-after: avoid; /* IEのみ */
}

.honbun h3,
:match(article,aside,nav,section) :match(article,aside,nav,section) h1 {
  display: block;
  margin: 1em 0; /* Webkit, Firefoxは、margin-before: 1em; margin-after: 1em; */
  font-size: 1.17em;
  font-weight: bold;
  page-break-after: avoid; /* IEのみ */
}

.honbun p {
  display: block;
  margin: 1em 0; /* Webkit, Firefoxは、margin-before: 1em; margin-after: 1em; */
}

.honbun ul { /* ol　もほぼ同じ */
  display: block;
  margin: 1em 0; /* Webkit, Firefoxは、margin-before: 1em; margin-after: 1em; */
  padding-start: 40px; /* IEは、padding-left: 30pt; Operaは、padding-left: 40px; */
  list-style-type: disc;
  list-style-position: outside;
}

.honbun li {
  display: list-item;
}

.honbun dl {
  display:block;
  margin: 1em 0; /* Webkit, Firefoxは、margin-before: 1em; margin-after: 1em; */
}
.honbun dt {
  display: block;
}
.honbun dd {
  display:block;
  margin-left: 40px; /* Webkit, Firefoxは、margin-start: 40px; */
}
.honbun strong {
  font-weight: bold;
}

.honbun em {
  font-style: italic;
}