:root{--ink:#233b34;--green:#235e50;--paper:#faf8f2;--line:#dfdfd3;--muted:#6e7d72;--accent:#cc754a}*{box-sizing:border-box}body{margin:0;color:var(--ink);font:15px/1.5 "Segoe UI","Microsoft YaHei",sans-serif;background:var(--paper)}[hidden]{display:none!important}button,input,select{font:inherit;color:inherit}button{cursor:pointer}button:disabled{opacity:.4;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #bb9f51;outline-offset:3px}button{border:0;background:transparent;border-radius:8px;min-height:40px}input,select{border:1px solid var(--line);border-radius:7px;padding:7px;background:#fff}button:hover{background:#e8eee7}.brand{font-size:23px;letter-spacing:2px;font-weight:650;display:flex;align-items:center;gap:9px}.brand small{font-size:9px;letter-spacing:2px;margin-left:5px;color:var(--muted)}.mark{color:var(--green);font-size:31px}.eyebrow{font-size:10px;letter-spacing:2px;color:var(--muted);margin:0 0 4px}.muted{color:var(--muted)}.login{min-height:100dvh;display:grid;place-items:center;background:radial-gradient(ellipse at 85% 20%,#dee9dd,transparent 55%),var(--paper);padding:24px}.login form{width:min(100%,400px)}.login h1{font:38px/1.5 Georgia,"Microsoft YaHei",serif;margin:24px 0 12px}.login label{display:block;margin-top:18px}.login input{width:100%;margin-top:6px;padding:12px}.primary{background:var(--green);color:#fff;width:100%;margin-top:26px;padding:12px}.primary:hover{background:#184738}#loginError{color:#a74432}#app{display:flex;height:100dvh;overflow:hidden}aside{width:296px;flex-shrink:0;background:#f1f2e9;border-right:1px solid var(--line);display:flex;flex-direction:column;padding:24px 20px 16px}.library-head{display:flex;align-items:center;justify-content:space-between}.collections{display:flex;margin:28px 0 20px;border-bottom:1px solid var(--line);gap:24px}.collections button{border-radius:0;font-weight:600;letter-spacing:2px;padding:8px 14px}.collections .selected{border-bottom:3px solid var(--green);color:var(--green)}.search span{position:absolute;clip:rect(0,0,0,0)}.search input{width:100%;background:#fafbf6}.group-label{color:var(--muted);font-size:12px;margin-top:18px}.group-label select{display:block;width:100%;margin-top:5px}.shelf-meta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:11px;margin:10px 0}.shelf-meta button{font-size:11px}#books{overflow-y:auto;flex:1}.book{display:flex;width:100%;text-align:left;padding:13px 9px;border-bottom:1px solid #e3e5d9;border-radius:0;align-items:center;gap:12px}.book .number{font-size:11px;font-variant-numeric:tabular-nums;color:#97a292}.book strong{font-weight:500;display:block}.book small{font-size:10px;color:var(--muted)}.book.active{background:#e0e9dd;border-left:3px solid var(--green)}aside footer{border-top:1px solid var(--line);padding-top:12px;display:flex;justify-content:space-between;align-items:center;font-size:10px;color:var(--muted)}aside footer button{font-size:11px}#issues{font-size:11px}#issueList{max-height:130px;overflow:auto;white-space:pre-wrap}main{flex:1;min-width:0;display:flex;flex-direction:column}#player{flex-shrink:0;background:var(--paper);padding:21px 32px 8px;border-bottom:1px solid var(--line);z-index:2}.lesson-head{display:flex;align-items:center;gap:14px}.lesson-head h1{font-family:Georgia,"Microsoft YaHei",serif;font-size:25px;font-weight:500;margin:0}.independent{margin-left:auto;color:var(--muted);font-size:12px;letter-spacing:3px}.transport{display:flex;align-items:center;gap:12px;margin:16px 0 12px}.seek{width:52px;font-size:25px;display:grid;line-height:1.05;padding:5px}.seek span{font-size:10px;margin-top:3px}.play{background:var(--green);color:#fff;font-size:22px;width:51px;height:51px;border-radius:50%;flex-shrink:0}.play:hover{background:#184738}.timeline{flex:1;margin-left:10px}.timeline input{width:100%;height:22px;padding:0;accent-color:var(--green);cursor:pointer}.timeline div{display:flex;justify-content:space-between;color:var(--muted);font:11px/1.3 monospace}.options{display:flex;flex-wrap:wrap;gap:9px 19px;align-items:center;font-size:12px}.options label{display:flex;gap:6px;align-items:center}.options select{padding:4px}.options input[type=number]{width:57px;padding:4px}.options input[type=checkbox]{width:16px;height:16px;accent-color:var(--green)}.status{font-size:11px;min-height:16px;color:var(--muted);margin:6px 0 0}.reader-tools{flex-shrink:0;display:flex;justify-content:space-between;align-items:center;padding:4px 28px;border-bottom:1px solid var(--line);background:#f4f3ed;font-size:11px;color:var(--muted)}.reader-tools div{display:flex;align-items:center;gap:7px}.reader-tools button{font-size:18px;min-width:32px;min-height:34px}#reader{flex:1;overflow:auto;overscroll-behavior:contain;background:#e5e7df;padding:24px 18px;position:relative}#pages{width:100%;display:flex;flex-direction:column;align-items:center;gap:20px}.pdf-page{background:#fff;box-shadow:0 2px 9px #26372c15;position:relative;flex-shrink:0;max-width:none;overflow:hidden}.pdf-page canvas{display:block;width:100%;height:100%}.pdf-page .page-number{position:absolute;top:8px;left:10px;font-size:10px;color:#6c796c}.placeholder{display:grid;place-items:center;height:100%;color:var(--muted);font-size:12px}#empty{text-align:center;margin:12vh auto;color:var(--muted);max-width:500px}#empty>span{font-size:64px;color:#9aac9c}#empty h2{font:24px/1.7 Georgia,"Microsoft YaHei",serif;color:var(--ink)}#pdfError{color:#a74432;text-align:center}.mobile{display:none}#shade{position:fixed;inset:0;background:#0005;z-index:4}
@media(min-width:1500px){#player{padding-left:6vw;padding-right:6vw}}
@media(max-width:850px){aside{width:252px;padding:18px 14px}.brand small{display:none}#player{padding:15px 18px 8px}.lesson-head h1{font-size:22px}.options{gap:8px 12px}.independent{display:none}}
@media(max-width:620px){.mobile{display:block}aside{position:fixed;inset:0 auto 0 0;width:min(86vw,320px);z-index:5;transform:translateX(-100%);transition:transform .15s}aside.open{transform:translateX(0)}#player{padding:10px 12px 7px}.lesson-head{gap:9px}.lesson-head h1{font-size:18px;line-height:1.3}.eyebrow{font-size:9px;letter-spacing:1px}.icon{font-size:22px;min-width:36px}.transport{gap:5px;margin:10px 0 7px}.play{height:46px;width:46px}.seek{width:42px}.timeline{margin-left:5px}.options{font-size:11px;gap:5px 12px}.options select,.options input[type=number]{min-height:34px}.check{min-height:34px}.reader-tools{padding:3px 12px}#reader{padding:12px 8px}#pages{gap:12px}.status{font-size:10px}.login h1{font-size:32px}}
/* Continuous course reading, inherited from the existing reading room. */
#library .collections{display:flex;flex-direction:column;gap:2px;margin:22px 0 18px;padding-bottom:14px}
#library .collections button{text-align:left;letter-spacing:0;padding:7px 12px;font-size:14px;border:0;border-radius:6px;line-height:1.4;min-height:38px}
#library .collections .selected{background:#dfe9dd;color:var(--green);box-shadow:inset 3px 0 var(--green)}
.reading-article #player .transport,.reading-article #player .options,.reading-article #player .status,.reading-article .independent{display:none}
.reading-article #player{padding-bottom:18px}
.reading-article .lesson-head h1{font-size:24px;line-height:1.5}
#reader.text-mode{background:var(--paper);padding:28px clamp(16px,4vw,60px) 60px}
#courseLayout{max-width:1110px;margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr);gap:24px}
#courseContents{border-bottom:1px solid var(--line);padding-bottom:14px;min-width:0;font-size:13px;color:var(--muted)}
#courseContents summary{cursor:pointer;font-size:14px;font-weight:600;min-height:40px;display:flex;align-items:center}
#courseContents summary::before{content:'＋';margin-right:10px}#courseContents[open] summary::before{content:'−'}
#sectionLinks{display:flex;flex-direction:column;gap:2px;max-height:320px;overflow:auto}
#sectionLinks a{color:var(--muted);text-decoration:none;padding:7px 2px;line-height:1.5}#sectionLinks a:hover{color:var(--green);background:#eaf0e7}
#courseBody{min-width:0;font-size:18px;line-height:1.9;overflow-wrap:anywhere}
#courseBody h2{font-size:1.36em;line-height:1.6;font-weight:650;color:var(--green);margin:2em 0 .85em;scroll-margin-top:20px}
#courseBody h2:first-child{margin-top:0}#courseBody h3{font-size:1.12em;line-height:1.6;margin:1.6em 0 .65em}
#courseBody p{margin:.8em 0}#courseBody ul,#courseBody ol{padding-left:1.4em}#courseBody li{margin:.4em 0}
#courseBody a{color:var(--green);text-decoration-thickness:1px;text-underline-offset:3px}
#courseBody blockquote{margin:24px 0;padding:10px 22px;border-left:3px solid #96b09c;background:#edf2e8}#courseBody blockquote p{margin:.4em 0}
#courseBody .table-scroll{overflow-x:auto;max-width:100%;margin:24px 0;border:1px solid var(--line);border-radius:8px}
#courseBody table{width:100%;border-collapse:collapse;font-size:.88em;line-height:1.7;text-align:left}
#courseBody th,#courseBody td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top;min-width:80px}
#courseBody th{background:#eaf0e5;font-weight:600}#courseBody tr:last-child td{border-bottom:0}
#courseBody figure{margin:26px 0}#courseBody img{display:block;width:auto;max-width:100%;height:auto;margin:auto;cursor:zoom-in;border-radius:5px}
#courseBody figcaption{font-size:12px;color:var(--muted);text-align:center;margin-top:10px}
#courseBody .diagram{overflow-x:auto;padding:18px 0}#courseBody .diagram svg{display:block;max-width:100%;height:auto;margin:auto}
#courseBody .equation{background:#f0f3eb;border-radius:8px;margin:14px 0;padding:18px 10px;overflow-x:auto}#courseBody math{font-size:1.15em}
#courseBody .answer{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:15px 0;margin:26px 0}
#courseBody .answer summary{cursor:pointer;font-weight:600;color:var(--green);min-height:44px;line-height:1.7;padding:8px}
#lessonNavigation{display:flex;justify-content:space-between;gap:16px;max-width:780px;margin:40px auto 0;padding-top:22px;border-top:1px solid var(--line)}#lessonNavigation button{border:1px solid var(--line);padding:10px 18px}
#imageDialog{width:min(96vw,1500px);max-width:96vw;height:90dvh;max-height:90dvh;padding:12px;background:#fff;border:1px solid var(--line);border-radius:8px;overflow:auto}#imageDialog::backdrop{background:#172a26b3}#closeImage{position:sticky;top:0;display:block;margin-left:auto;background:var(--green);color:white;padding:8px 16px;z-index:1}#imageContent{overflow:auto;padding:16px}#imageContent img{display:block;max-width:none;min-width:100%;height:auto;margin:auto}
@media(min-width:1100px){#courseLayout{grid-template-columns:190px minmax(0,780px);gap:36px}#courseContents{position:sticky;top:0;align-self:start;border:0;max-height:calc(100dvh - 180px)}#sectionLinks{max-height:calc(100dvh - 240px)}#lessonNavigation{margin-right:0}.reading-article #player .lesson-head h1{font-size:26px}}
@media(max-width:850px){#library .collections{margin-top:16px}.reading-article #player{padding:12px 18px}.reading-article .lesson-head h1{font-size:21px}#reader.text-mode{padding:22px 22px 44px}}
@media(max-width:620px){.reading-article #player{padding:12px}.reading-article .lesson-head h1{font-size:18px}#reader.text-mode{padding:18px 16px 36px}#courseLayout{gap:20px}#courseBody{line-height:1.85}#courseBody h2{font-size:1.22em}#courseBody blockquote{padding:8px 14px}#courseBody .stack-mobile,#courseBody .stack-mobile tbody,#courseBody .stack-mobile tr,#courseBody .stack-mobile td{display:block;width:100%}#courseBody .stack-mobile thead{display:none}#courseBody .stack-mobile tr{padding:12px;border-bottom:1px solid var(--line)}#courseBody .stack-mobile td{border:0;padding:5px 0;min-width:0}#courseBody .stack-mobile td::before{content:attr(data-label);display:block;font-size:12px;letter-spacing:.3px;color:var(--muted);font-weight:600;margin-bottom:2px}#courseBody .table-scroll{border-radius:6px}.reader-tools{min-height:46px;gap:10px}.reader-tools>span{max-width:65%;line-height:1.4}.reader-tools button{min-width:38px;min-height:40px}#imageContent{padding:6px}#imageContent img{min-width:700px}#lessonNavigation{margin-top:28px}#lessonNavigation button{font-size:14px}}
#courseBody .glossary{margin:20px 0}#courseBody .glossary dt{font-weight:650;font-size:1.05em;color:var(--green);padding-top:20px;border-top:1px solid var(--line)}#courseBody .glossary dd{margin:6px 0 20px}#courseBody .glossary dd p{margin:.4em 0}#courseBody .term-english{font-size:.9em;color:var(--muted)}#courseBody .figure-note{font-size:.87em;color:var(--muted);margin-top:8px}#courseBody .source-ref{font-size:.85em}#courseBody .sources{font-size:.85em}
@media(max-width:1000px){.mobile{display:block}#library{position:fixed;inset:0 auto 0 0;width:min(86vw,320px);z-index:5;transform:translateX(-100%);transition:transform .15s}#library.open{transform:translateX(0)}}
@media(max-width:620px){#courseBody .stack-mobile .table-heading{display:none}}
/* Each course keeps a stable visual language; controls retain their positions. */
body[data-theme=feed]{--ink:#263c34;--green:#146052;--paper:#FFFFFF;--line:#e0eae5;--muted:#5d756b;--accent:#D87524;--sidebar:#EFF7F3;--soft:#F3F9F6;--evidence:#f5faf7;--exercise:#fff9f2}
body[data-theme=finance]{--ink:#27364b;--green:#1B3A6B;--paper:#FFFFFF;--line:#e0e6ef;--muted:#647389;--accent:#C49435;--sidebar:#F0F4FA;--soft:#F4F7FC;--evidence:#f6f8fc;--exercise:#fdfaf2}
body[data-theme=clinical]{--ink:#263c45;--green:#183340;--paper:#FFFFFF;--line:#dfe9eb;--muted:#5c737b;--accent:#008577;--sidebar:#EFF6F6;--soft:#F3F9F8;--evidence:#f5faf9;--exercise:#f3faf7}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library{background:var(--sidebar);color:var(--ink);border-right:1px solid var(--line)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library .brand .mark{color:var(--green)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library .brand small,body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library .group-label,body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library .shelf-meta,body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library footer,body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library .book small{color:var(--muted)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library .collections{border-color:var(--line)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library button:hover{background:#fff}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library .collections .selected{color:var(--green);background:#fff;box-shadow:inset 3px 0 var(--green)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library .book{border-color:var(--line)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library .book.active{background:#fff;border-left-color:var(--green);border-bottom-color:var(--line)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library .book .number{color:var(--muted)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library footer{border-color:var(--line)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) .reader-tools{background:#fff}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #courseBody th{background:var(--soft)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #courseBody blockquote{background:var(--soft);border-color:var(--accent)}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #sectionLinks a:hover{background:var(--soft)}
#courseBody .lesson-section{padding:26px 0 36px;border-bottom:1px solid var(--line)}
#courseBody .lesson-section:first-child{padding-top:0}
#courseBody .lesson-section>h2:first-child{margin:0 0 20px}
#courseBody .lesson-section[data-kind=practice]{background:var(--exercise);padding:24px 28px;margin:26px 0;border:0}
#courseBody .lesson-section[data-kind=reference]{font-size:.88em;color:var(--muted);padding-bottom:20px}
#courseBody .formula-set{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,330px),1fr));gap:12px;margin:22px 0}
#courseBody .formula-set .equation{margin:0}
body[data-theme=feed] .lesson-head h1{font-family:"Segoe UI","Microsoft YaHei",sans-serif;font-weight:650}
body[data-theme=feed] #courseBody h2{font-family:"Segoe UI","Microsoft YaHei",sans-serif;font-weight:750;letter-spacing:-.4px}
body[data-theme=feed] #courseBody .lesson-section>h2+p:has(>em:only-child){font-style:normal;color:var(--green);font-size:.9em;margin-top:-12px}
body[data-theme=feed] #courseBody .table-scroll{border:0;border-radius:0}
body[data-theme=feed] #courseBody th{background:var(--soft);color:var(--green);text-transform:none;font-weight:550}
body[data-theme=feed] #courseBody tbody td:first-child{font-weight:650;color:var(--green)}
body[data-theme=feed] #courseBody tbody tr:nth-child(even){background:var(--soft)}
body[data-theme=feed] #courseBody .lesson-section[data-kind=evidence]{border-left:3px solid var(--accent);padding-left:24px}
body[data-theme=finance] .lesson-head h1,body[data-theme=finance] #courseBody h2{font-family:Georgia,"Noto Serif SC","SimSun",serif;font-weight:600}
body[data-theme=finance] #courseBody{line-height:2}
body[data-theme=finance] #courseBody .lesson-section[data-kind=concept]>h2{color:var(--green)}
body[data-theme=finance] #courseBody .equation{background:#fff;border:1px solid var(--accent);border-radius:0;padding:22px 8px}
body[data-theme=finance] #courseBody .table-scroll{border:0;border-radius:0;border-top:2px solid var(--accent)}
body[data-theme=finance] #courseBody th{background:transparent;border-bottom:2px solid var(--line);color:var(--green)}
body[data-theme=finance] #courseBody .diagram{background:var(--soft);padding:24px 12px}
body[data-theme=clinical] .lesson-head h1{font-family:"Segoe UI","Microsoft YaHei",sans-serif;font-weight:600}
body[data-theme=clinical] #courseBody .lesson-section[data-kind=evidence]{background:#fff;padding:26px 28px;border-top:3px solid var(--accent);border-bottom:0;margin:24px 0}
body[data-theme=clinical] #courseBody .lesson-section[data-kind=evidence]>h2{font-size:1.22em}
body[data-theme=clinical] #courseBody figure{background:#fff;padding:14px 0}
body[data-theme=clinical] #courseBody .figure-note{border-left:2px solid var(--accent);padding-left:14px;color:var(--muted)}
body[data-theme=clinical] #courseBody .glossary dt{padding:14px 18px;background:var(--soft);border:0;font-size:1em}
body[data-theme=clinical] #courseBody .glossary dd{padding:12px 18px;background:#fff;margin:0 0 18px;font-size:.93em}
body[data-theme=clinical] #courseBody .answer{background:var(--soft);border:0;padding:10px 20px}
@media(max-width:620px){#courseBody .lesson-section{padding:22px 0 28px}#courseBody .lesson-section[data-kind=practice]{padding:18px 16px}body[data-theme=clinical] #courseBody .lesson-section[data-kind=evidence]{padding:20px 16px}body[data-theme=feed] #courseBody .lesson-section[data-kind=evidence]{padding-left:14px}body[data-theme=feed] #courseBody .stack-mobile tbody td:first-child{font-size:1.05em}#courseBody .formula-set{grid-template-columns:1fr}}
body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library input,body:is([data-theme=feed],[data-theme=finance],[data-theme=clinical]) #library select{color:var(--ink)}