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52px);left:var(--home-page-pad,var(--page-padding,20px));height:var(--article-header-height);visibility:hidden;opacity:0;pointer-events:none;border-bottom:1px solid var(--color-line);backdrop-filter:blur(14px);background:#f4f4f1f5;grid-template-columns:2.75rem minmax(0,1fr) 2.75rem;align-items:stretch;transition:opacity .16s,visibility .16s;display:grid;position:fixed}.article-reading-nav[data-visible=true]{visibility:visible;opacity:1;pointer-events:auto}body[data-article-reading] .site-overlay-brand{visibility:hidden;opacity:0;pointer-events:none}.article-reading-nav__step,.article-reading-nav__current{min-width:0;color:var(--color-text);cursor:pointer;background:0 0;border:0;padding:0}.article-reading-nav__step{font-size:.8rem}.article-reading-nav__step:disabled{color:var(--color-line);cursor:default}.article-reading-nav__current{border-right:1px solid var(--color-line);border-left:1px solid var(--color-line);place-content:center;justify-items:center;padding-inline:.5rem;display:grid;position:relative}.article-reading-nav__current>span{letter-spacing:.1em;font-size:.5rem}.article-reading-nav__current>strong{text-overflow:ellipsis;white-space:nowrap;max-width:min(48vw,32rem);font-size:.66rem;overflow:hidden}.article-reading-nav__current>small{color:var(--color-muted);letter-spacing:.12em;font-size:.42rem}.article-reading-nav__current>i{background:var(--color-line);height:2px;position:absolute;bottom:0;left:0;right:0;overflow:hidden}.article-reading-nav__current>i>b{background:var(--color-text);width:0;height:100%;display:block}.article-reading-nav__menu{z-index:120;top:calc(var(--article-header-height) + .35rem);right:max(var(--page-padding), 3.5rem);left:var(--page-padding);color:#fff;background:#111111fa;border:1px solid #444;max-height:min(66dvh,30rem);position:fixed;overflow:auto;box-shadow:0 1rem 2.5rem 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#666;min-width:44px;min-height:44px;padding:0;font-size:.58rem;font-weight:700}.article-audio-dock__minimize{min-width:2.4rem}.article-audio-dock__identity{min-width:0;display:grid}.article-audio-dock__identity>span,.article-audio-dock__identity>small{color:#999;letter-spacing:.11em;font-size:.48rem}.article-audio-dock__identity strong,.article-audio-dock__identity em{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.article-audio-dock__identity strong{font-size:.7rem}.article-audio-dock__identity em{color:#ddd;font-size:.54rem;font-style:normal}.article-audio-dock__timeline{align-items:center;min-width:0;display:flex}.article-audio-dock__timeline input{accent-color:#fff;cursor:pointer;width:100%;min-width:0;min-height:30px;margin:0}.article-audio-dock time{color:#aaa;font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap;width:6rem;font-size:.55rem}.article-audio-dock__progress{background:#333;height:2px;display:block;position:absolute;bottom:0;left:0;right:0;overflow:hidden}.article-audio-dock__progress b{background:#fff;height:100%;display:block}.article-audio-orb{z-index:90;right:max(.7rem, env(safe-area-inset-right));bottom:max(.7rem, env(safe-area-inset-bottom));color:#fff;cursor:pointer;background:#111;border:1px solid #555;border-radius:50%;width:3rem;height:3rem;padding:0;position:fixed;box-shadow:0 0 0 1px #f4f4f11f}.article-audio-orb.is-playing{box-shadow:0 0 0 3px #1111112e}.article-audio-dock button:focus-visible,.article-audio-dock input:focus-visible,.article-audio-orb:focus-visible{outline-offset:3px;outline:2px solid #fff}.article-visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}@supports (height:100dvh){.article-system{--article-viewport-height:100dvh}}@media (width>=760px){.article-system{--article-header-height:74px}.article-header{padding-top:9.25rem}.article-header__layout{grid-template-columns:minmax(0,1.05fr) minmax(18rem,.8fr);align-items:center}.article-toc ol{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (width<=759px){.article-toc{width:100%}.article-toc>p{padding-inline:var(--page-padding)}.article-toc ol{scroll-padding-inline:var(--page-padding);scroll-snap-type:x proximity;scrollbar-width:thin;border-left:0;display:flex;overflow-x:auto}.article-toc li{scroll-snap-align:start;flex:none;width:min(78vw,17rem)}.article-toc li:first-child{margin-left:var(--page-padding);border-left:1px solid var(--color-line)}.article-toc li:last-child{margin-right:var(--page-padding)}.article-reading-nav__menu{right:max(.5rem, env(safe-area-inset-right));left:max(.5rem, env(safe-area-inset-left))}.article-audio-dock{grid-template-rows:auto auto;grid-template-columns:2.8rem minmax(0,1fr) 2.4rem;padding-bottom:.45rem}.article-audio-dock__toggle{grid-area:1/1}.article-audio-dock__identity{grid-area:1/2}.article-audio-dock__minimize{grid-area:1/3}.article-audio-dock__timeline{grid-area:2/1/auto/3}.article-audio-dock time{grid-area:2/3;width:auto;font-size:.48rem}}@media (width<=380px){.article-reading-nav{right:calc(var(--home-page-pad,var(--page-padding,20px)) + 46px);grid-template-columns:2.35rem minmax(0,1fr) 2.35rem}.article-reading-nav__current>strong{max-width:43vw;font-size:.61rem}.article-audio-dock{right:max(.35rem, env(safe-area-inset-right));bottom:max(.35rem, env(safe-area-inset-bottom));left:max(.35rem, env(safe-area-inset-left))}}@media (prefers-reduced-motion:reduce){.article-reading-nav,.article-audio-orb{transition-duration:1ms;animation:none}}