:root{--desk:#bec7b2;--paper:#eee1c3;--paper-deep:#e5d8b9;--cover:#354e3c;--ink:#2c4034;--muted:#40513d;--gold:#a78139;--line:#bba36e;--focus:#745829;--highlight:#e6cc82;--button:#31553d;--ease:cubic-bezier(.16,1,.3,1)}
*{box-sizing:border-box}html{background:var(--desk);color:var(--ink);scroll-behavior:smooth;scrollbar-color:var(--gold) var(--paper)}body{margin:0;font-family:BookSerif,Georgia,'Times New Roman',serif;font-weight:600}::selection{background:var(--highlight);color:var(--ink)}button,a,input,select{touch-action:manipulation;-webkit-tap-highlight-color:transparent}button,select{font:inherit;color:inherit}button{cursor:pointer}button:active{transform:translateY(1px);background:var(--highlight)}button:disabled{opacity:.5;cursor:default}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--focus);outline-offset:4px}button,select{border:1px solid var(--line);border-radius:7px;background:var(--paper);min-height:44px;padding:9px 15px}button:hover,select:hover{background:#e5d3aa}.site-bar{max-width:1500px;margin:auto;padding:18px 34px;display:flex;justify-content:space-between;align-items:center;gap:20px}.wordmark{font-size:24px;text-decoration:none;letter-spacing:-.02em}.language-switch{display:flex;gap:4px}.language-switch button{border:0;background:transparent;padding:7px 13px;font-size:14px}.language-switch [aria-pressed=true]{background:var(--cover);color:var(--paper)}h1,h2,h3,p{margin-top:0}h1,h2,h3{text-wrap:balance}h1{letter-spacing:-.025em}main{min-height:70vh}.loading-message{text-align:center;margin:100px 20px}.library{max-width:1250px;margin:auto;padding:15px 34px 70px}.library-heading{display:flex;align-items:end;justify-content:space-between;gap:35px;margin:20px 0 34px}.library h1{font-size:clamp(32px,4vw,54px);margin-bottom:10px;line-height:1.25}.library-heading p{max-width:46ch;line-height:1.8;margin-bottom:0;font-size:17px}.library-subtitle{font-size:20px;color:var(--muted)}.shelf{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:38px 28px}.volume{display:block;text-decoration:none;position:relative;outline-offset:7px!important}.volume-cover{position:relative;aspect-ratio:.72;background:var(--cover);padding:12px 12px 18px 18px;box-shadow:9px 12px 22px #30462c32;border-radius:3px 8px 8px 3px;overflow:hidden;transition:transform .3s var(--ease),box-shadow .3s var(--ease)}.volume:hover .volume-cover{transform:translateY(-6px) rotate(-.5deg);box-shadow:10px 18px 26px #30462c40}.volume-cover:before{content:'';position:absolute;left:8px;top:0;bottom:0;width:4px;background:#a7813980}.volume-cover:after{content:'';position:absolute;inset:12px 12px 17px 18px;border:1px solid #d3b475;pointer-events:none}.volume-cover img{width:100%;height:68%;object-fit:cover;display:block}.volume-title{padding:15px 12px 0;color:var(--paper);font-size:22px;line-height:1.4}.volume-title small{display:block;font-size:12px;margin-top:7px}.volume-caption{padding:15px 2px 0;line-height:1.6;font-size:14px;color:var(--muted);display:flex;justify-content:space-between;gap:8px}.library-footer{margin-top:50px;padding-top:22px;border-top:1px solid #819474;display:flex;justify-content:space-between;gap:30px;line-height:1.7;font-size:14px}.resume-link{display:inline-block;margin-top:15px;min-height:44px}.reader{max-width:1500px;margin:auto;padding:0 30px 34px}.reader-heading{display:flex;justify-content:space-between;align-items:center;gap:18px;margin:8px 0 22px}.reader-heading h1{font-size:27px;margin-bottom:5px}.reader-heading p{font-size:13px;margin-bottom:0;color:var(--muted)}.reader-actions{display:flex;gap:8px}.reader-actions button,.reader-actions a{font-size:13px;min-height:44px}.reader-actions a{display:flex;align-items:center}.binding{background:var(--cover);padding:13px;border-radius:8px;box-shadow:0 20px 42px #30462c35,5px 7px 0 #b4ae93,8px 11px 0 #92977f;position:relative}.binding:before{content:'';position:absolute;inset:7px;border:1px solid var(--gold);border-radius:4px;pointer-events:none}.desktop-book{width:100%;height:640px}.book-page{background:var(--paper);overflow:hidden}.page-interior{height:100%;padding:38px 34px 28px;position:relative;display:flex;flex-direction:column}.page-interior:before{content:'';position:absolute;inset:17px;border:1px solid var(--line);pointer-events:none}.picture-page{background:var(--paper-deep);padding:32px 31px 24px}.plate-title{font-size:19px;margin:0 0 20px;line-height:1.5;flex-shrink:0}.plate-title small{display:block;font-size:14px;margin-top:5px}.picture-frame{flex:1;min-height:0;overflow:hidden;position:relative;background:#e1d2ad;display:flex;align-items:center;justify-content:center}.picture-frame img{width:100%;height:100%;object-fit:contain;display:block;user-select:none}.art-note{font-size:11px;line-height:1.7;margin:18px 0 0;color:var(--muted)}.page-number{margin-top:auto;padding-top:16px;text-align:center;font-size:12px;font-variant-numeric:tabular-nums}.text-page h2{font-size:clamp(22px,2vw,30px);line-height:1.4;margin-bottom:22px}.text-page h2 small{font-size:16px;display:block;margin-top:9px}.reader-copy{font-size:20px;line-height:2;max-width:70ch}.sentence{display:inline;padding:0;min-height:0;border:0;border-radius:2px;background:transparent;font:inherit;line-height:inherit;text-align:left;box-decoration-break:clone;-webkit-box-decoration-break:clone}.sentence:hover{background:#e4d2a760}.sentence:active{transform:none;background:var(--highlight)}.reader-copy p{margin-bottom:20px}.reader-copy .en{font-size:18px;line-height:1.75}.reader-copy .zh+.en{padding-top:16px;border-top:1px solid var(--line)}.spoken-word.active{color:#183824;background:var(--highlight);border-radius:3px;box-shadow:0 2px 0 var(--gold)}.page-tools{margin-top:21px;display:flex;flex-wrap:wrap;gap:8px}.explore-button{background:var(--button);color:var(--paper);border-color:var(--button)}.explore-button:hover{background:#243f2c}.word-button{font-size:13px;min-height:40px;padding:7px 11px}.touch-hint{font-size:12px;color:var(--muted);line-height:1.8;margin-top:16px}.mobile-spread{display:none}.reader-navigation{display:flex;align-items:center;justify-content:center;gap:20px;margin:23px 0 12px}.reader-navigation button{min-width:92px}.position{font-size:13px;text-align:center;min-width:130px;font-variant-numeric:tabular-nums}.audio-bar{max-width:1000px;margin:22px auto 0;display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap}.play-button{background:var(--button);color:var(--paper);border-color:var(--button);min-width:122px}.play-button:hover{background:#243f2c}.audio-bar label{display:flex;align-items:center;gap:6px;font-size:13px}.audio-bar select{min-height:42px;font-size:13px;padding:8px}.audio-bar input[type=checkbox]{width:18px;height:18px;accent-color:var(--button)}.audio-status{font-size:12px;text-align:center;min-height:22px;line-height:1.7;margin-top:13px;color:var(--muted)}.progress-line{height:3px;max-width:700px;background:#aeb799;margin:13px auto 0;overflow:hidden}.progress-line span{height:100%;width:0;display:block;background:var(--button)}dialog{color:var(--ink);background:var(--paper);border:8px solid var(--cover);border-radius:10px;box-shadow:0 22px 65px #22322255;padding:23px;max-height:92dvh}dialog::backdrop{background:#223222a8}.explore-dialog{width:min(1280px,96vw);max-width:none}.explore-top{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:20px;position:sticky;top:-23px;padding:8px 0;background:var(--paper);z-index:5}.explore-top h2{font-size:25px;margin:0}.explore-top h2 small{font-size:15px;display:block;margin-top:6px}.explore-top button{flex-shrink:0;font-size:13px}.explore-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.8fr);gap:30px}.explore-stage{min-width:0}.zoom-viewport{position:relative;height:min(50vh,500px);background:var(--paper-deep);overflow:hidden;touch-action:none;border-radius:3px}.zoom-image{width:100%;height:100%;object-fit:contain;display:block;touch-action:none}.zoom-tools{display:flex;flex-wrap:wrap;gap:7px;margin:12px 0}.zoom-tools button{font-size:13px}.focus-tabs{display:flex;gap:7px;flex-wrap:wrap;margin:16px 0}.focus-tabs button{font-size:13px}.focus-tabs button[aria-pressed=true]{background:var(--button);color:var(--paper)}.explore-copy{font-size:17px;line-height:1.9}.explore-copy .en{font-size:16px;line-height:1.8}.explore-copy h3{font-size:21px;margin:4px 0 16px}.explore-copy p{margin-bottom:18px}.local-map{width:120px;height:80px;position:absolute;bottom:10px;right:10px;border:2px solid var(--paper);box-shadow:0 3px 9px #0005;pointer-events:none}.local-map img{width:100%;height:100%;object-fit:cover}.local-map .map-box{position:absolute;border:2px solid #fff2c5;background:#b29a4540;left:0;top:0;width:100%;height:100%}.mechanism{margin-top:20px;background:var(--paper-deep);padding:18px;border-radius:4px}.mechanism-title{font-size:17px;margin-bottom:12px}.mechanism canvas{width:100%;aspect-ratio:2.25;display:block;touch-action:none}.mechanism-controls{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:12px}.mechanism-controls button{font-size:13px}.mechanism-controls [aria-pressed=true]{background:var(--button);color:var(--paper)}.mechanism-controls label{font-size:13px;display:flex;align-items:center;gap:10px;flex:1}.mechanism-controls input[type=range]{accent-color:var(--button);width:100%;min-width:130px;min-height:40px;cursor:pointer}.mechanism-output{font-size:15px;line-height:1.8;margin-top:14px;min-height:50px}.mechanism-caption{font-size:11px;line-height:1.6;color:var(--muted);margin:10px 0 0}.list-dialog{width:min(780px,95vw)}.contents-link{display:flex;gap:15px;padding:14px 5px;align-items:center;border-bottom:1px solid var(--line);text-decoration:none;min-height:64px;font-size:16px}.contents-link:hover{background:var(--paper-deep)}.contents-link span{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.contents-link small{display:block;font-size:13px;margin-top:4px}.references-list{padding-left:22px;font-size:15px;line-height:1.8}.references-list li{padding:10px 0}.source-caption{font-size:14px;line-height:1.8}.word-dialog{width:min(500px,92vw);text-align:center;padding:35px}.word-dialog #close-word{float:right;font-size:12px;margin-bottom:30px}.word-dialog h2{clear:both;font-size:30px}.word-dialog p{line-height:1.8}.word-dialog #word-pinyin{font-size:17px;color:var(--muted)}.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--cover);color:var(--paper);padding:12px 20px;border-radius:7px;max-width:90vw;line-height:1.7;z-index:20;display:none}.toast.visible{display:block}.read-error{max-width:600px;margin:90px auto;padding:25px;line-height:1.8}.library-book-end{padding:34px;text-align:center;line-height:1.8}.library-book-end h3{font-size:24px}.next-book-link{display:inline-block;min-height:44px;padding:12px 18px;background:var(--button);color:var(--paper);text-decoration:none;border-radius:7px}
@media(min-width:1100px){.binding{max-width:1370px;margin:auto}.binding:after{content:'';position:absolute;left:calc(50% - 7px);top:14px;bottom:14px;width:14px;background:linear-gradient(90deg,#645b3435,transparent,#645b3435);pointer-events:none;z-index:3}}
@media(max-width:1099px){.desktop-book{display:none}.mobile-spread{display:block;background:var(--paper);padding:22px 26px}.mobile-picture{position:relative;background:var(--paper-deep);margin:-5px -7px 25px}.mobile-picture img{width:100%;max-height:48vh;object-fit:contain;display:block}.mobile-spread h2{font-size:28px;margin-bottom:22px;line-height:1.4}.mobile-spread h2 small{display:block;font-size:17px;margin-top:10px}.reader-copy{font-size:21px;line-height:1.95}.reader-copy .en{font-size:19px}.reader{max-width:870px;padding:0 24px 35px}.reader-heading{align-items:flex-start}.reader-heading h1{font-size:25px}.page-tools{margin-top:25px}.binding{padding:10px}.mobile-spread .page-number{margin-top:24px}.shelf{grid-template-columns:repeat(3,minmax(0,1fr))}.explore-layout{grid-template-columns:1fr}.explore-copy{max-width:70ch}.zoom-viewport{height:min(48vh,490px)}.explore-copy{border-top:1px solid var(--line);padding-top:20px}.volume-title{font-size:20px}}
@media(max-width:650px){.site-bar{padding:13px 15px;gap:8px}.wordmark{font-size:19px}.language-switch button{font-size:12px;padding:7px 9px}.library{padding:15px 19px 45px}.library-heading{display:block;margin:15px 0 28px}.library h1{font-size:36px}.library-heading p{font-size:15px;margin-top:18px}.shelf{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 18px}.volume-cover{padding:9px 9px 14px 14px}.volume-cover:after{inset:9px 9px 14px 14px}.volume-cover img{height:60%}.volume-title{font-size:17px;padding:12px 8px 0}.volume-title small{font-size:10px;margin-top:5px}.volume-caption{font-size:12px;display:block}.volume-caption span{display:block}.library-footer{display:block;font-size:12px}.reader{padding:0 12px 30px}.reader-heading{display:block;margin:6px 0 16px}.reader-heading h1{font-size:23px}.reader-actions{margin-top:13px;justify-content:space-between}.reader-actions button{padding:7px 11px}.mobile-spread{padding:19px 17px}.mobile-spread h2{font-size:25px}.mobile-picture{margin:-3px -4px 22px}.reader-copy{font-size:19px;line-height:1.95}.reader-copy .en{font-size:17px;line-height:1.85}.binding{padding:8px;border-radius:5px}.reader-navigation{gap:10px}.reader-navigation button{min-width:76px;padding:8px 10px;font-size:13px}.position{font-size:11px;min-width:112px}.audio-bar{gap:10px;justify-content:center}.audio-bar label{font-size:12px}.audio-bar select{font-size:12px;max-width:152px}.audio-bar .continuous-label{width:100%;justify-content:center;margin-top:5px}.explore-dialog{width:97vw;padding:14px;border-width:6px;max-height:95dvh}.explore-top{top:-14px;gap:9px}.explore-top h2{font-size:20px}.explore-top button{padding:8px 10px;min-height:44px}.explore-layout{gap:16px}.zoom-viewport{height:34vh;min-height:210px}.zoom-tools button{padding:7px 12px}.local-map{width:90px;height:60px}.mechanism{padding:12px}.mechanism canvas{aspect-ratio:1.8}.explore-copy{font-size:17px}.explore-copy .en{font-size:16px}.focus-tabs button{padding:7px 10px}.list-dialog{padding:15px}.contents-link{font-size:15px}.library-book-end{padding:20px 6px}.art-note{font-size:10px}}
[data-swipe]{touch-action:pan-y}.word-button,.audio-bar select,.mechanism-controls input[type=range]{min-height:44px}.mobile-picture img{height:auto}.language-switch button{white-space:nowrap}.audio-bar .continuous-label{min-height:44px}.mechanism-view-label{line-height:1.7;font-size:14px;margin:0 0 12px}
@media(max-width:650px){.site-bar{flex-direction:column;align-items:stretch;gap:7px}.wordmark{line-height:1.5}.language-switch{justify-content:flex-end;flex-shrink:0}.audio-bar label:has(select){flex-basis:100%;justify-content:center}.audio-bar select{max-width:none;width:auto}.explore-top{align-items:flex-start}.mechanism canvas{aspect-ratio:2.25}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}.volume:hover .volume-cover{transform:none}}