@media (min-width:1024px){.course-column-layout{transition:grid-template-columns .26s cubic-bezier(.16,1,.3,1)}.course-article-navigation{min-width:0;opacity:1;transform:translateZ(0);visibility:visible;transition:opacity .18s ease-out 60ms,transform .26s cubic-bezier(.16,1,.3,1),border-color .18s ease-out,visibility 0s linear}.article-navigation-hidden .course-column-layout,[data-article-navigation-hidden=true] .course-column-layout{grid-template-columns:0 minmax(0,1fr)}.article-navigation-hidden .course-article-navigation,[data-article-navigation-hidden=true] .course-article-navigation{opacity:0;pointer-events:none;transform:translate3d(-12px,0,0);visibility:hidden;border-color:transparent;transition:opacity .14s ease-in,transform .22s cubic-bezier(.4,0,1,1),border-color .14s ease-in,visibility 0s linear .26s}.article-navigation-hidden button[title="文章目录"],[data-article-navigation-hidden=true] button[title="文章目录"]{display:inline-flex;animation:article-navigation-trigger-enter .16s ease-out .1s both}@keyframes article-navigation-trigger-enter{0%{opacity:0;transform:translateY(2px)}to{opacity:1;transform:translateY(0)}}}@media (min-width:1024px) and (prefers-reduced-motion:reduce){.course-article-navigation,.course-column-layout{transition:none}.article-navigation-hidden button[title="文章目录"],[data-article-navigation-hidden=true] button[title="文章目录"]{animation:none}}