#parent_1 > div.sub {
  max-height: 600px;
  overflow: auto;
}
.articledetail-cont h1,
.articledetail-cont h2,
.articledetail-cont h3,
.articledetail-cont h4,
.articledetail-cont h5,
.articledetail-cont h6 {
	font-weight: revert;
}