.htz-toc {
position: sticky;
top: 16px;
z-index: 5;
margin: 15px 0 12px;
padding: 12px 0 8px;
background: #fff;
border: 1px solid #e8e8e8;
border-radius: 2px;
box-shadow: 0 1px 2px rgba(0,0,0,.04);
font-size: 13px;
line-height: 1.5;
}
.htz-toc__header {
padding: 0 14px 10px;
font-size: 16px;
font-weight: 700;
color: #222;
border-bottom: 1px solid #eee;
}
.htz-toc__list {
list-style: none;
margin: 8px 0 0;
padding: 0 0 4px;
max-height: min(60vh, 480px);
overflow: auto;
}
.htz-toc__list > li { margin: 0; }
.htz-toc__link {
display: block;
padding: 6px 14px;
color: #333 !important;
text-decoration: none !important;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.htz-toc__link:hover { color: #fc5531 !important; }
.htz-toc__item--h3 .htz-toc__link { padding-left: 28px; color: #555 !important; }
.htz-toc__link.is-active {
color: #fc5531 !important;
background: #f5f2ff;
}
.htz-toc__toggle {
display: block;
width: 100%;
margin: 4px 0 0;
padding: 8px 0;
border: 0;
border-top: 1px solid #eee;
background: transparent;
color: #666;
cursor: pointer;
font-size: 13px;
text-align: center;
}
.htz-toc__toggle::before {
content: "";
display: inline-block;
width: 0;
height: 0;
margin-right: 4px;
border-left: 4px solid transparent;
border-right: 4px solid transparent;
border-bottom: 5px solid #888;
vertical-align: middle;
}
.htz-toc.is-collapsed .htz-toc__list { display: none; }
.htz-toc.is-collapsed .htz-toc__toggle::before {
border-bottom: 0;
border-top: 5px solid #888;
}
.dark .htz-toc {
background: #1e1e1e;
border-color: #333;
box-shadow: none;
}
.dark .htz-toc__header { color: #eee; border-bottom-color: #333; }
.dark .htz-toc__link { color: #ccc !important; }
.dark .htz-toc__item--h3 .htz-toc__link { color: #aaa !important; }
.dark .htz-toc__link.is-active {
color: #ff7a66 !important;
background: #2a2438;
}
.dark .htz-toc__toggle { color: #999; border-top-color: #333; }
@media screen and (max-width: 991px) {
#htz-toc { display: none !important; }
}