@font-face{font-family:LectureSystem;src:local('PingFang SC');font-display:swap}
:root{--bg:#eaece5;--paper:#fafaf5;--ink:#223d34;--muted:#708078;--accent:#226d56;--accent-soft:#e0ece2;--line:#d6ded4;--chrome:#f5f6f0;--shadow:0 18px 70px #203b3420;--sand:#bca56e;color-scheme:light}
html[data-theme=dark]{--bg:#101c18;--paper:#192b24;--ink:#e8eee6;--muted:#a7b7aa;--accent:#8ad1ab;--accent-soft:#2c473a;--line:#354a40;--chrome:#17261f;--shadow:0 18px 70px #0005;--sand:#d6bf87;color-scheme:dark}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:LectureSystem,'PingFang SC','Microsoft YaHei',sans-serif;overflow:hidden;transition:background .25s,color .25s}button,input,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer;border:1px solid transparent;background:transparent;border-radius:8px;padding:9px 12px;white-space:nowrap}button:hover{background:var(--accent-soft)}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:3px}a{color:var(--accent)}.toolbar{height:72px;display:flex;align-items:center;gap:6px;padding:0 24px;background:var(--chrome);border-bottom:1px solid var(--line)}.toolbar-spacer{flex:1}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:650;font-size:17px;letter-spacing:1px}.brand-mark{display:grid;place-items:center;background:var(--accent);color:var(--paper);width:37px;height:39px;border-radius:15px 3px 15px 3px;font-size:18px}.brand-sub{font-size:10px;color:var(--muted);display:block;letter-spacing:3px;margin-top:3px}.icon-button{font-size:22px}.toolbar button{font-size:13px}#viewport{height:calc(100dvh - 146px);display:flex;align-items:center;justify-content:center;padding:22px 28px;position:relative}#stage-wrap{position:relative;flex:none;box-shadow:var(--shadow);overflow:hidden;background:var(--paper)}#stage{width:1600px;height:900px;position:absolute;left:0;top:0;transform-origin:0 0;background:var(--paper);overflow:hidden}#stage>.source-svg{width:100%;height:100%;display:block}#stage>.source-original{width:100%;height:100%;object-fit:contain;background:white}.player{height:74px;position:relative;padding:0 30px;display:flex;align-items:center;justify-content:space-between;background:var(--chrome);border-top:1px solid var(--line)}.location{display:flex;flex-direction:column;gap:4px;font-size:13px;min-width:220px}#sourceLabel{font-size:10px;color:var(--muted)}.navigation{display:flex;align-items:center;gap:14px}.navigation>button:first-child,.navigation>button:last-child{font-size:24px}#counter{font-size:13px;font-variant-numeric:tabular-nums;color:var(--muted)}.tools{display:flex;justify-content:flex-end;min-width:220px}.tools button{font-size:12px}.progress-track{height:3px;position:absolute;bottom:0;left:0;right:0;background:var(--line)}#progress{height:100%;background:var(--accent);transition:width .25s}#loading{position:absolute;background:var(--chrome);padding:12px 20px;border-radius:8px;box-shadow:var(--shadow);font-size:13px}dialog{background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:28px;max-height:88dvh}dialog::backdrop{background:#0e251c99;backdrop-filter:blur(5px)}.contents-dialog{width:min(1120px,94vw)}.dialog-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.dialog-heading h2{margin:0;font-size:24px}.eyebrow{font-size:10px;letter-spacing:3px;color:var(--muted);margin:0 0 8px}#searchInput{width:100%;border:1px solid var(--line);border-radius:9px;background:var(--chrome);color:var(--ink);padding:12px 15px;font:inherit}.chapter-filters{display:flex;gap:5px;flex-wrap:wrap;padding:16px 0}.chapter-filters button{font-size:11px;padding:6px 9px}.chapter-filters .active{background:var(--accent);color:var(--paper)}.slide-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.slide-card{text-align:left;padding:0;border-radius:8px;overflow:hidden;border:1px solid var(--line);background:var(--chrome);position:relative}.slide-card img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}.slide-card p{font-size:12px;margin:10px;line-height:1.5;white-space:normal}.slide-card small{font-size:10px;color:var(--muted);display:block;margin:0 10px 10px}.slide-card .badge{position:absolute;top:8px;right:8px;background:#226d56;color:white;border-radius:4px;padding:3px 6px;font-size:9px}.slide-card.current{outline:2px solid var(--accent)}.notes-dialog{width:min(900px,94vw)}.notes-context{font-size:12px;line-height:1.8;color:var(--muted)}#notesText{font:15px/1.9 LectureSystem,'PingFang SC','Microsoft YaHei',sans-serif;white-space:pre-wrap;overflow-wrap:anywhere}.original-images{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:25px 0}.original-images img{width:100%;height:150px;object-fit:contain;background:white;border:1px solid var(--line)}.help-dialog{width:min(650px,94vw);font-size:14px;line-height:1.9}#toast{position:fixed;bottom:95px;left:50%;transform:translateX(-50%);padding:12px 20px;background:var(--ink);color:var(--paper);border-radius:8px;font-size:13px;z-index:10}
.enhanced{height:100%;padding:62px 78px 48px;display:flex;flex-direction:column;position:relative;background:var(--paper)}.enhanced:before{content:'';position:absolute;left:0;top:0;width:12px;height:100%;background:var(--accent)}.slide-kicker{font-size:15px;letter-spacing:4px;color:var(--muted);margin:0 0 17px}.enhanced h1{font-size:44px;line-height:1.25;font-weight:650;margin:0 0 16px;letter-spacing:1px}.slide-subtitle{margin:0;font-size:19px;line-height:1.6;color:var(--muted);max-width:1300px}.enhanced-body{display:flex;flex:1;min-height:0;gap:42px;padding:24px 0 16px}.chart{flex:1;min-width:0;min-height:0}.chart-aside{width:330px;flex-shrink:0;display:flex;flex-direction:column;justify-content:center;gap:22px}.stat{border-top:1px solid var(--line);padding-top:18px}.stat strong{font-size:44px;line-height:1.3;color:var(--accent);display:block;font-weight:600}.stat span{font-size:17px;line-height:1.7;color:var(--muted)}.slide-footnote{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;line-height:1.6;display:flex;justify-content:space-between;gap:35px}.plain-text-layout{display:grid;grid-template-columns:1fr 360px;gap:46px;flex:1;min-height:0;padding:28px 0}.plain-text{display:flex;flex-direction:column;justify-content:center;gap:22px;font-size:24px;line-height:1.8}.plain-text p{margin:0}.plain-photo{width:100%;height:100%;object-fit:cover;border-radius:3px}.cover{padding:0;display:grid;grid-template-columns:1.04fr 1fr}.cover:before{display:none}.cover-copy{padding:100px 50px 80px 80px;display:flex;flex-direction:column;justify-content:center}.cover-copy h1{font-size:70px;line-height:1.4;margin:28px 0;color:var(--ink)}.cover-copy h1 span{color:var(--accent);display:block}.cover-author{font-size:27px;margin-top:30px;line-height:1.8}.cover-author small{font-size:18px;color:var(--muted);display:block}.cover-art{position:relative;overflow:hidden;background:var(--accent-soft)}.cover-art img{width:100%;height:100%;object-fit:cover}.cover-art:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,var(--paper),transparent 20%)}.cover-meta{margin-top:45px;font-size:15px;color:var(--muted);letter-spacing:2px}.error-state{padding:100px;font-size:25px;line-height:2}.error-state button{border:1px solid var(--line)}
@media(max-width:700px){.toolbar{height:58px;padding:0 10px;gap:0}.toolbar button{padding:8px;font-size:11px}.toolbar button span,.brand-sub{display:none}.brand{font-size:12px;gap:7px}.brand-mark{width:27px;height:29px;font-size:14px}#viewport{height:calc(100dvh - 120px);padding:8px}.player{height:62px;padding:0 12px}.location{min-width:0;font-size:10px;max-width:110px}#sourceLabel{font-size:9px}.tools{min-width:30px}.navigation{gap:1px}.slide-grid{grid-template-columns:repeat(2,1fr)}.tools #replayButton{font-size:0}.tools #replayButton:first-letter{font-size:15px}.original-images{grid-template-columns:repeat(2,1fr)}dialog{padding:18px}#counter{font-size:11px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
@media print{body{overflow:visible}.toolbar,.player,dialog,#loading{display:none!important}#viewport{height:auto;padding:0}#stage-wrap{box-shadow:none}}
:root{--source-red:#a93232}
html[data-theme=dark]{--source-red:#f19b91}