:root{--bg:#EDF0EA;--surface:#FCFCF8;--surface-2:#E2E7DF;--drawer:#3E4A45;--drawer-ink:#FCFCF8;--text:#1F2A2A;--muted:#55615E;--accent:#3A3F94;--accent-ink:#FFFFFF;--accent-2:#A3262F;--brass:#A7802F;--line:#8FA3B6;--line-strong:#7F8C86;--focus:#8E5F0C;--class-a:#2F6E8F;--class-b:#3D7A55;--class-c:#8A5A1E;--class-d:#7A3F7E;--class-e:#3A5A9E;--class-f:#8E3B32;--font-head:"Source Serif 4", "Noto Serif TC", "Songti TC", "PMingLiU", "Noto Serif CJK TC", serif;--font-body:"Source Serif 4", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", "Noto Sans CJK TC", sans-serif;--font-ui:"Noto Sans TC", "PingFang TC", "Microsoft JhengHei", "Noto Sans CJK TC", system-ui, sans-serif;--font-num:"Source Serif 4", "Noto Serif TC", "Songti TC", serif;--fs-xs:.8125rem;--fs-sm:.9375rem;--fs-base:1.0625rem;--fs-md:1.25rem;--fs-lg:1.5rem;--fs-xl:1.875rem;--fs-2xl:2.375rem;--fs-3xl:2.25rem;--s-1:.25rem;--s-2:.5rem;--s-3:.75rem;--s-4:1rem;--s-5:1.5rem;--s-6:2rem;--s-7:3rem;--s-8:4rem;--s-9:6rem;--e-1:0 1px 0 var(--line-strong);--e-2:0 1px 0 var(--line-strong), 0 6px 0 -3px var(--surface-2), 0 7px 0 -3px var(--line-strong);--e-3:0 18px 40px -24px rgb(20 30 30 / .35);--gutter:16px;--cls:var(--line-strong)}@media(prefers-color-scheme:dark){:root{--bg:#141A1B;--surface:#1D2526;--surface-2:#252F30;--drawer:#2C3633;--drawer-ink:#E4E7E0;--text:#E4E7E0;--muted:#A3ADA8;--accent:#AEB2F4;--accent-ink:#141A1B;--accent-2:#F2969B;--brass:#C9A35A;--line:#4B5D66;--line-strong:#6B7A7E;--focus:#E3B25A;--class-a:#7FB6D3;--class-b:#8CC5A1;--class-c:#D6A86A;--class-d:#C99ACC;--class-e:#9DB4EA;--class-f:#E39A90;--e-3:0 18px 40px -24px rgb(0 0 0 / .6)}}@media(min-width:768px){:root{--gutter:24px}}@media(min-width:1024px){:root{--gutter:32px;--fs-3xl:3.25rem}}.cls-a{--cls:var(--class-a)}.cls-b{--cls:var(--class-b)}.cls-c{--cls:var(--class-c)}.cls-d{--cls:var(--class-d)}.cls-e{--cls:var(--class-e)}.cls-f{--cls:var(--class-f)}*,*::before,*::after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:5rem}body.reading-room{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--fs-base);line-height:1.85;letter-spacing:.02em;font-feature-settings:"palt" 0;overflow-wrap:anywhere}body.reading-room>main{flex:1 0 auto}img,svg{max-width:100%;height:auto}a{color:var(--accent);text-underline-offset:3px;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}p{text-wrap:pretty}h1,h2,h3{text-wrap:balance;font-family:var(--font-head);font-weight:700}ul,ol{margin:0;padding:0}.unseen{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.jump-in{position:absolute;left:var(--s-3);top:-4rem;z-index:60;background:var(--accent);color:var(--accent-ink);padding:var(--s-2)var(--s-4);border-radius:3px}.jump-in:focus{top:var(--s-2)}.shelf-frame{width:100%;max-width:1200px;margin-inline:auto;padding-inline:var(--gutter)}.callno{font-family:var(--font-num);font-weight:600;font-size:var(--fs-sm);font-variant-numeric:tabular-nums lining-nums;letter-spacing:0;white-space:nowrap}.callno-letter{color:var(--accent-2);font-weight:700}.callno-big{font-size:var(--fs-md)}.ledger-bar{position:sticky;top:0;z-index:40;background:var(--surface);border-bottom:1px solid var(--line-strong)}.ledger-in{display:flex;align-items:center;gap:var(--s-3);min-height:56px}@media(min-width:1024px){.ledger-in{min-height:64px;gap:var(--s-5)}}.brand-lockup{display:inline-flex;align-items:center;gap:var(--s-3);color:var(--text);text-decoration:none}.brand-lockup:hover{text-decoration:none}.brand-mark{display:block;flex:none;width:36px;height:auto}.bm-card{fill:var(--surface);stroke:var(--text);stroke-width:2.5;stroke-linejoin:round}.bm-rule{stroke:var(--accent-2);stroke-width:2.5}.bm-ruled{stroke:var(--line);stroke-width:1.5}.bm-hole{fill:var(--text)}.brand-word{font-family:var(--font-head);font-weight:700;font-size:1.375rem;letter-spacing:.1em;line-height:1.1}.brand-sub{display:none;font-size:var(--fs-xs);color:var(--muted);letter-spacing:.08em;padding-left:var(--s-3);border-left:1px solid var(--line-strong)}@media(min-width:1280px){.brand-sub{display:inline}}.class-rail{display:none;margin-left:auto}.rail-list{display:flex;list-style:none;gap:0}.rail-item{position:relative}.rail-link{display:flex;align-items:center;min-height:64px;padding:0 .8rem;color:var(--text);text-decoration:none;font-family:var(--font-ui);font-weight:500;font-size:var(--fs-sm);box-shadow:inset 0 -3px transparent}.rail-link:hover,.rail-item:focus-within>.rail-link{box-shadow:inset 0 -3px 0 var(--cls)}.rail-link[aria-current=page]{box-shadow:inset 0 -3px 0 var(--cls);font-weight:700}.rail-drop{display:none;position:absolute;top:100%;left:0;min-width:16rem;z-index:50;background:var(--surface);border:1px solid var(--line-strong);border-top:3px solid var(--cls);box-shadow:var(--e-3);padding:var(--s-2)0;font-family:var(--font-ui)}.rail-item:hover>.rail-drop,.rail-item:focus-within>.rail-drop{display:block}.rail-drop ul{list-style:none}.drop-hub,.rail-drop li a{display:flex;align-items:baseline;gap:var(--s-3);padding:.45rem var(--s-4);color:var(--text);text-decoration:none;font-size:var(--fs-sm);line-height:1.5}.drop-hub{font-weight:700;border-bottom:1px dotted var(--line);margin-bottom:var(--s-1)}.rail-drop li a:hover,.drop-hub:hover{background:var(--surface-2)}.drop-no{font-family:var(--font-num);font-weight:600;font-variant-numeric:tabular-nums;color:var(--accent-2);min-width:2.2em}.drop-name{flex:1}.drop-n{margin-left:auto;font-family:var(--font-num);font-variant-numeric:tabular-nums;color:var(--muted);font-size:var(--fs-xs)}@media(min-width:1024px){.class-rail{display:block}}.finder,.sheet{display:block}.finder{margin-left:auto}@media(min-width:1024px){.finder{margin-left:0}}.finder summary,.sheet summary{list-style:none;cursor:pointer}.finder summary::-webkit-details-marker,.sheet summary::-webkit-details-marker{display:none}.finder-toggle,.sheet-toggle{display:grid;place-items:center;width:44px;height:44px;color:var(--text);border:1px solid transparent;border-radius:3px}.finder-toggle:hover,.sheet-toggle:hover,.finder[open]>.finder-toggle,.sheet[open]>.sheet-toggle{background:var(--surface-2);border-color:var(--line-strong)}.finder-panel,.sheet-body{position:absolute;left:0;right:0;top:100%;background:var(--surface);border-bottom:1px solid var(--line-strong);box-shadow:var(--e-3)}.finder-panel{padding:var(--s-4)0}.sheet-body{max-height:calc(100vh - 56px);overflow-y:auto;padding:var(--s-4)0 var(--s-5)}.sheet-bars,.sheet-bars::before,.sheet-bars::after{display:block;width:20px;height:2px;background:currentColor;position:relative}.sheet-bars::before,.sheet-bars::after{content:"";position:absolute;left:0}.sheet-bars::before{top:-6px}.sheet-bars::after{top:6px}@media(min-width:1024px){.sheet{display:none}}.sheet-class{border-top:1px solid var(--line);margin-top:var(--s-3)}.sheet-class:first-of-type{margin-top:var(--s-4)}.sheet-class>summary{padding:var(--s-3)0;font-family:var(--font-ui);font-weight:700;border-left:4px solid var(--cls);padding-left:var(--s-3)}.sheet-class ul{list-style:none;padding-bottom:var(--s-2)}.sheet-class li a{display:flex;gap:var(--s-3);align-items:baseline;padding:.5rem var(--s-3).5rem var(--s-5);color:var(--text);text-decoration:none;font-family:var(--font-ui);font-size:var(--fs-sm)}.label-holder{position:relative;display:flex;align-items:center;gap:var(--s-2);max-width:46rem;margin-inline:auto;background:var(--surface);border:2px solid var(--brass);border-radius:0;padding:.3rem 1.1rem}.label-holder::before,.label-holder::after{content:"";position:absolute;top:50%;width:6px;height:6px;margin-top:-3px;border-radius:50%;background:var(--brass)}.label-holder::before{left:5px}.label-holder::after{right:5px}.label-input{flex:1;min-width:0;min-height:44px;border:0;background:0 0;color:var(--text);font:inherit;font-family:var(--font-ui);font-size:var(--fs-base);padding:.4rem .25rem;border-radius:0}.label-input::placeholder{color:var(--muted);opacity:1}.label-input:focus-visible{outline-offset:0}.label-go{flex:none;min-height:44px;padding:0 1.25rem;border:0;border-radius:3px;cursor:pointer;background:var(--accent);color:var(--accent-ink);font-family:var(--font-ui);font-weight:500;font-size:var(--fs-base)}.label-go:hover{filter:brightness(.92)}.label-go:active{transform:translateY(1px)}.label-holder.is-hero .label-input{font-size:var(--fs-md);min-height:52px}.label-holder.is-hero{max-width:52rem}.drawer-front{position:relative;isolation:isolate;overflow:hidden;background:var(--drawer);color:var(--drawer-ink);padding:var(--s-7)0 var(--s-6)}.drawer-front::before{content:"";position:absolute;inset:0;z-index:-1;background:var(--drawer-ink);opacity:.06;-webkit-mask:url(/ct/yiwen-tabs-tile.svg)0 0/120px 80px repeat;mask:url(/ct/yiwen-tabs-tile.svg)0 0/120px 80px repeat}.drawer-ask{margin:0 0 var(--s-5);text-align:center;font-size:var(--fs-3xl);line-height:1.2;letter-spacing:.04em;font-feature-settings:"palt" 1}.drawer-ask label{cursor:text}.drawer-front :focus-visible{outline-color:var(--drawer-ink)}.drawer-front .label-input:focus-visible,.drawer-front .label-go:focus-visible{outline-color:var(--focus)}.drawer-pull{display:block;width:38px;height:38px;margin:var(--s-5)auto 0;border-radius:50%;border:2px solid var(--brass);position:relative}.drawer-pull::after{content:"";position:absolute;inset:11px;border-radius:50%;background:var(--brass)}.drawer-hints{margin:var(--s-5)0 0;text-align:center;font-family:var(--font-ui);font-size:var(--fs-sm);line-height:2}.drawer-hints a{color:var(--drawer-ink);margin:0 var(--s-2);display:inline-block}.index-box{margin-top:var(--s-5)}.tab-series{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;padding-top:4px;scrollbar-width:thin}.guide-tab{position:relative;flex:none;display:flex;align-items:center;min-height:44px;padding:0 1.5rem;scroll-snap-align:start;white-space:nowrap;background:var(--surface-2);color:var(--text);text-decoration:none;border:1px solid var(--line-strong);border-bottom:0;border-radius:8px 8px 0 0;margin-left:-1px;border-left:4px solid var(--cls);font-family:var(--font-ui);font-weight:500;font-size:var(--fs-sm);transition:transform 120ms}.tab-series .guide-tab:first-child{margin-left:0}.guide-tab:active{transform:translateY(2px)}.guide-tab[aria-selected=true]{background:var(--surface);z-index:2;margin-bottom:-1px;padding-bottom:1px;font-weight:700}.guide-tab-zy{border-left-width:1px}.tray{background:var(--surface);border:1px solid var(--line-strong);padding:var(--s-5)var(--gutter)var(--s-6);margin-bottom:var(--s-5);position:relative;z-index:1}.tray[hidden]{display:none}.tray-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:var(--s-2)var(--s-5);margin-bottom:var(--s-5)}.tray-head h2{margin:0;font-size:var(--fs-lg);line-height:1.4;letter-spacing:.04em}.tray-head h2 a{color:var(--text);text-decoration:none}.tray-head h2 a:hover{text-decoration:underline}.tray-count{margin:0;color:var(--muted);font-size:var(--fs-sm)}@keyframes tray-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.tray.is-shown{animation:tray-in 320ms cubic-bezier(.3,0,.1,1)}.guide-grid{list-style:none;display:grid;gap:var(--s-5)var(--s-5);grid-template-columns:1fr;padding-top:28px}@media(min-width:768px){.guide-grid{grid-template-columns:repeat(2,1fr)}}@media(min-width:1024px){.guide-grid{grid-template-columns:repeat(3,1fr)}}@media(min-width:1280px){.guide-grid{grid-template-columns:repeat(4,1fr)}}.guide-card{position:relative;background:var(--surface);border:1px solid var(--line-strong);border-radius:0 3px 3px 3px;box-shadow:var(--e-1);margin-top:0;transition:transform 200ms,box-shadow 200ms}.guide-card:hover,.guide-card:focus-within{transform:translateY(-3px);box-shadow:var(--e-2)}.guide-card-tab{position:absolute;left:-1px;top:-29px;height:30px;min-width:4.5rem;padding:0 var(--s-3);display:flex;align-items:center;background:var(--surface);border:1px solid var(--line-strong);border-bottom:0;border-left:4px solid var(--cls);border-radius:8px 8px 0 0}.guide-card-body{padding:var(--s-4)}.guide-card-name{margin:0 0 var(--s-2);display:flex;justify-content:space-between;align-items:baseline;gap:var(--s-3);font-size:var(--fs-md);line-height:1.4;letter-spacing:.04em}.guide-card-link{color:var(--text);text-decoration:none}.guide-card-link::after{content:"";position:absolute;inset:0}.guide-card-link:hover{text-decoration:underline}.guide-card-n{flex:none;font-family:var(--font-num);font-size:var(--fs-sm);color:var(--muted);font-weight:600;font-variant-numeric:tabular-nums}.sample-list{list-style:none;font-size:var(--fs-sm);line-height:1.6;color:var(--muted)}.sample-list li{position:relative;padding:.25rem 0 .25rem 1.1rem;border-top:1px dotted var(--line);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.sample-list li::before{content:"";position:absolute;left:0;top:.85em;width:6px;height:6px;border:1.25px solid var(--accent);border-radius:50%}.zs-radio{position:absolute;opacity:0;pointer-events:none}.zs-switch{display:flex;gap:var(--s-2);margin-bottom:var(--s-4);font-family:var(--font-ui);font-size:var(--fs-sm)}.zs-switch label{padding:.35rem 1rem;border:1px solid var(--line-strong);border-radius:3px;cursor:pointer}#zs-zy:checked~.zs-switch label[for=zs-zy],#zs-az:checked~.zs-switch label[for=zs-az]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}#zs-zy:focus-visible~.zs-switch label[for=zs-zy],#zs-az:focus-visible~.zs-switch label[for=zs-az]{outline:3px solid var(--focus);outline-offset:2px}#zs-zy:checked~.zs-by-az,#zs-az:checked~.zs-by-zy{display:none}.zs-list{margin:0}.zs-group{display:grid;grid-template-columns:2.5rem 1fr;gap:var(--s-3);padding:.6rem 0;border-top:1px dotted var(--line)}.zs-group dt{font-family:var(--font-head);font-weight:700;font-size:var(--fs-lg);color:var(--accent-2);line-height:1.4}.zs-group dd{margin:0}.zs-no{font-family:var(--font-num);font-weight:600;font-variant-numeric:tabular-nums;color:var(--muted);font-size:var(--fs-sm)}.zs-latin{color:var(--muted);font-size:var(--fs-sm)}.home-lower{display:grid;gap:var(--s-6);padding-top:var(--s-4);padding-bottom:var(--s-8)}.home-lower.is-deep{padding-top:var(--s-6)}@media(min-width:1024px){.home-lower{grid-template-columns:minmax(0,3fr)minmax(0,2fr);gap:var(--s-7)}.home-lower.is-deep{grid-template-columns:minmax(0,1fr)}}.shelf-head{margin:0 0 var(--s-4);font-size:var(--fs-lg);line-height:1.4;letter-spacing:.04em;padding-bottom:var(--s-2);border-bottom:1px solid var(--line-strong)}.shelf-list{list-style:none}.shelf-row{border-bottom:1px dotted var(--line)}.shelf-link{display:grid;grid-template-columns:5.5em minmax(0,1fr);column-gap:var(--s-3);align-items:baseline;padding:.6rem var(--s-2);color:var(--text);text-decoration:none}.shelf-link:hover{background:var(--surface-2)}.shelf-link:hover .shelf-title{text-decoration:underline}.shelf-title{line-height:1.6}.shelf-date{grid-column:2;font-family:var(--font-num);font-variant-numeric:tabular-nums;color:var(--muted);font-size:var(--fs-xs)}@media(min-width:640px){.shelf-link{grid-template-columns:5.5em minmax(0,1fr)auto}.shelf-date{grid-column:3}}.hub-aside .hub-card{margin-bottom:var(--s-4)}.hub-card{position:relative;margin-top:30px;background:var(--surface);border:1px solid var(--line-strong);border-radius:0 3px 3px 3px;box-shadow:var(--e-2)}.hub-card-tab{position:absolute;left:-1px;top:-31px;height:31px;padding:0 var(--s-3);display:flex;align-items:center;gap:var(--s-3);background:var(--accent);color:var(--accent-ink);border:1px solid var(--accent);border-radius:8px 8px 0 0}.hub-card-tab .callno,.hub-card-tab .callno-letter{color:var(--accent-ink)}.hub-card-kind{font-family:var(--font-ui);font-size:var(--fs-xs);font-weight:500;letter-spacing:.08em}.hub-card-body{padding:var(--s-4)}.hub-card-name{margin:0 0 var(--s-2);font-size:var(--fs-md);line-height:1.4;letter-spacing:.04em}.hub-card-link{color:var(--text);text-decoration:none}.hub-card-link::after{content:"";position:absolute;inset:0}.hub-card-link:hover{text-decoration:underline}.hub-card-desc{margin:0 0 var(--s-2);font-size:var(--fs-sm);color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.hub-card-where{margin:0;font-family:var(--font-ui);font-size:var(--fs-xs);color:var(--muted)}.trail{padding:var(--s-4)0 var(--s-3);font-family:var(--font-ui);font-size:var(--fs-sm)}.trail ol{list-style:none;display:flex;flex-wrap:wrap;gap:0 var(--s-2)}.trail li+li::before{content:"›";color:var(--muted);margin-right:var(--s-2)}.trail [aria-current]{color:var(--muted)}.drawer-page{padding-bottom:var(--s-8)}.drawer-head{position:relative;margin-top:34px;padding:var(--s-5);background:var(--surface);border:1px solid var(--line-strong);border-radius:0 3px 3px 3px;box-shadow:var(--e-1)}.drawer-head-tab{position:absolute;left:-1px;top:-35px;height:35px;padding:0 var(--s-4);display:flex;align-items:center;background:var(--surface);border:1px solid var(--line-strong);border-bottom:0;border-left:4px solid var(--cls);border-radius:8px 8px 0 0;font-family:var(--font-ui);font-weight:700}.drawer-h1{margin:0 0 var(--s-2);font-size:var(--fs-2xl);line-height:1.25;letter-spacing:.04em}.drawer-h1-page{font-size:var(--fs-md);color:var(--muted);font-weight:600;margin-left:var(--s-2)}.drawer-note{margin:0 0 var(--s-2);color:var(--muted);font-size:var(--fs-md);line-height:1.6;max-width:40em}.drawer-count{margin:0;font-family:var(--font-num);color:var(--muted);font-size:var(--fs-sm)}.drawer-block{margin-top:var(--s-6)}.card-grid{list-style:none;display:grid;gap:var(--s-5);grid-template-columns:1fr}@media(min-width:768px){.card-grid{grid-template-columns:repeat(2,1fr)}}@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}.sibling-tabs{margin-top:var(--s-7);padding-top:var(--s-4);border-top:1px solid var(--line-strong)}.sibling-label{margin:0 0 var(--s-3);font-family:var(--font-ui);font-size:var(--fs-sm);color:var(--muted)}.sibling-tabs ul{list-style:none;display:flex;flex-wrap:wrap;gap:var(--s-2)}.sibling-tab{display:inline-flex;gap:var(--s-2);align-items:center;min-height:44px;padding:0 var(--s-4);text-decoration:none;color:var(--text);background:var(--surface-2);border:1px solid var(--line-strong);border-left:4px solid var(--cls);border-radius:8px 8px 0 0;font-family:var(--font-ui);font-size:var(--fs-sm)}.sibling-tab:hover{background:var(--surface)}.tag-chips{list-style:none;display:flex;flex-wrap:wrap;gap:var(--s-2)}.tag-chip{display:inline-flex;align-items:center;gap:var(--s-2);padding:.2rem .8rem;border:1px solid var(--line-strong);border-radius:999px;color:var(--text);text-decoration:none;font-size:var(--fs-xs);font-family:var(--font-ui)}.tag-chip::before{content:"";width:6px;height:6px;border-radius:50%;border:1.25px solid var(--accent)}.tag-chip:hover{background:var(--surface-2)}.cat-card{position:relative;display:flex;flex-direction:column;min-height:15rem;background:var(--surface);border:1px solid var(--line-strong);border-radius:3px;box-shadow:var(--e-1);padding:26px var(--s-4)0;transition:transform 200ms,box-shadow 200ms}.cat-card::before{content:"";position:absolute;left:12px;right:12px;top:12px;border-top:3px solid 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