.blog_block_toc {
	overflow: hidden;
	background: #F9F9F9;
	border-radius: 0.4rem;
  margin: 3rem 0 5.3rem;
}
.blog_block_toc_toggle {
	display: flex;
	align-items: center;
	justify-content: space-between;
	width: 100%;
	padding: 1.6rem 2rem;
	border: 0;
	background: #F9F9F9;
	cursor: pointer;
	text-align: left;
  border-bottom: solid 3px #fff;
}
.blog_block_toc_heading {
	display: flex;
	align-items: baseline;
	gap: 0.8rem;
}
.blog_block_toc_heading_en {
	font-size: 16px;
	font-weight: bold;
	line-height: 1;
	color: #000;
}
.blog_block_toc_heading_ja {
	font-size: 12px;
	font-weight: normal;
	line-height: 1;
	color: #888;
}
.blog_block_toc_icon {
	display: flex;
	align-items: center;
	justify-content: center;
	flex: 0 0 2.4rem;
	width: 2.4rem;
	height: 2.4rem;
	border-radius: 50%;
	background: #000;
	transition: transform 0.2s ease;
}
.blog_block_toc_icon::before {
	content: "";
	display: block;
	width: 0;
	height: 0;
	border-left: 0.5rem solid transparent;
	border-right: 0.5rem solid transparent;
	border-bottom: 0.6rem solid #fff;
	margin-top: -0.2rem;
}
.blog_block_toc.is_collapsed .blog_block_toc_icon {
	transform: rotate(180deg);
}
.blog_block_toc_panel {
	padding: 2rem 2.4rem 2.4rem;
	background: #F9F9F9;
}
.blog_block_toc.is_collapsed .blog_block_toc_panel {
	display: none;
}
.blog_block_toc_sections {
	margin: 0;
	padding: 0;
	list-style: none;
}
.blog_block_toc_section {
	margin-bottom: 3.2rem;
  text-align: left;
}
.blog_block_toc_section:last-child {
	margin-bottom: 0;
}
.blog_block_toc_section_link {
  display: block;
  width: fit-content;
	padding-bottom: 0.2rem;
  margin-bottom: 1.6rem;
	border-bottom: 1px dashed #AEAEAE;
	font-size: 16px;
	font-weight: bold;
	line-height: 1.6;
  letter-spacing: 0.03em;
	color: #000;
	text-decoration: none;
}
.blog_block_toc_section_link:hover {
	opacity: 0.7;
}
.blog_block_toc_children {
	margin: 0;
	padding: 0 0 0 2.4rem;
	list-style: none;
}
.blog_block_toc_child {
	position: relative;
	padding-left: 1.4rem;
	margin-bottom: 0.4rem;
}
.blog_block_toc_child:last-child {
	margin-bottom: 0;
}
.blog_block_toc_child::before {
	content: "";
	position: absolute;
	top: 50%;
	left: 0;
  transform: translateY(-50%);
	width: 0.5rem;
	height: 0.5rem;
	border-radius: 50%;
	background: #ccc;
}
.blog_block_toc_child_link {
  display: block;
  width: fit-content;
	font-size: 13px;
  padding: 0.2rem 0 0.1rem;
	line-height: 1.6;
  letter-spacing: 0.03em;
	color: #000;
	text-decoration: none;
}
.blog_block_toc_child_link:hover {
	opacity: 0.7;
}

/* editor preview */
.blog_block_toc_header_preview {
	display: flex;
	align-items: baseline;
	gap: 0.8rem;
	margin-bottom: 1.6rem;
	padding: 1.2rem 1.6rem;
	background: #f0f0f0;
	border-radius: 0.4rem;
}

@media screen and (max-width: 768px) {
  .blog_block_toc_panel {
    padding: 2rem 1.2rem;
  }
  .blog_block_toc_children {
    padding: 0 0 0 1.4rem;
  }
}