.article-toc {
    margin: 0 0 40px;
    padding: 28px 32px;
    border: 1px solid #e4e4e4;
    border-radius: 20px;
    background: #fafafa;
}
.article-toc__title {
    display: block;
    margin-bottom: 16px;
    font-size: 24px;
    font-weight: 700;
    color: #171717;
}
.post__content .article-toc__list {
    margin: 0;
    padding: 0;
    list-style: none;
}
.post__content .article-toc__item {
    margin: 10px 0 0;
    list-style: none;
    font-size: 18px;
    line-height: 1.5;
    overflow-wrap: anywhere;
}
.post__content .article-toc__item--sub { padding-left: 24px; }
.article-toc a { color: #171717; text-decoration: underline; text-underline-offset: 4px; }
.article-toc a:hover { color: #ff6a00; }
.article-toc a:focus-visible, .article-back-top:focus-visible { outline: 3px solid #ff6a00; outline-offset: 5px; }
.article-anchor { scroll-margin-top: 180px; }
.article-back-top { display: none; }
@media (min-width: 1024px) and (hover: hover) and (pointer: fine) {
    .article-back-top:not([hidden]) {
        display: block;
        position: fixed;
        left: 24px;
        bottom: 24px;
        z-index: 50;
        padding: 14px 20px;
        border-radius: 30px;
        background: #171717;
        color: #fff;
        font: inherit;
        font-size: 16px;
        cursor: pointer;
        box-shadow: 0 4px 16px #0002;
    }
    .article-back-top:hover { background: #ff6a00; }
}
@media (max-width: 767px) {
    .article-toc { padding: 20px; margin-bottom: 28px; }
    .article-toc__title { font-size: 22px; }
    .post__content .article-toc__item { font-size: 16px; }
    .article-anchor { scroll-margin-top: 100px; }
}