:root{--base:#080e18;--panel:#101b2b;--panel-raised:#152338;--inset:#0a1321;--text:#eaf3ff;--muted:#a8b8ce;--dim:#7e94b0;--accent:#59d4f2;--accent-soft:#143449;--gold:#ebcb8b;--border:rgba(175,204,243,.14);--line:rgba(175,204,243,.08);--danger:#ffb5b5;--success:#8ed9b4;--header:72px;--side:220px;color-scheme:dark}
:root[data-theme=light]{--base:#f2f6fa;--panel:#fff;--panel-raised:#eef4fa;--inset:#edf2f7;--text:#182b43;--muted:#4c607a;--dim:#5b6e85;--accent:#006b89;--accent-soft:#dceff7;--gold:#795b16;--border:rgba(25,55,90,.18);--line:rgba(25,55,90,.1);--danger:#9b2838;--success:#14663f;color-scheme:light}
*{box-sizing:border-box}body{margin:0;background:var(--base);color:var(--text);font-family:'Microsoft YaHei','PingFang SC',system-ui,sans-serif;font-size:15px;line-height:1.65;font-variant-numeric:tabular-nums}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:var(--accent);text-underline-offset:4px}button{color:inherit}button:disabled{opacity:.5;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}button,a{touch-action:manipulation}button svg{pointer-events:none}button:hover{transition:background 160ms,color 160ms,border-color 160ms}::selection{background:var(--accent-soft);color:var(--text)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.skip{position:fixed;left:20px;top:-80px;z-index:20;padding:12px;background:var(--panel);border:2px solid var(--accent)}.skip:focus{top:12px}.topbar{height:var(--header);display:flex;align-items:center;padding:0 28px;border-bottom:1px solid var(--border);gap:25px;background:var(--base)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text);font-size:22px;font-weight:750;white-space:nowrap}.brand-sub{font-size:17px;letter-spacing:1px;margin-left:10px;font-weight:500}.top-purpose{font-size:13px;color:var(--dim);padding-left:22px;border-left:1px solid var(--border)}.top-actions{margin-left:auto;display:flex;align-items:center;gap:12px}.version{font-size:12px;color:var(--muted);margin-right:10px}.icon-button{width:40px;min-width:40px;height:40px;border:1px solid var(--border);border-radius:9px;background:transparent;display:inline-flex;align-items:center;justify-content:center;color:var(--muted)}.icon-button:hover{background:var(--panel-raised);color:var(--text)}.icon{width:19px;height:19px;stroke:currentColor;stroke-width:1.7;fill:none;stroke-linecap:round;stroke-linejoin:round}.menu-toggle{display:none}.app-shell{display:grid;grid-template-columns:var(--side) minmax(0,1fr);height:calc(100dvh - var(--header))}.sidebar{display:flex;flex-direction:column;min-height:0;padding:28px 16px 18px;border-right:1px solid var(--border);overflow-y:auto;background:var(--base)}.workspace-name{font-size:12px;color:var(--dim);display:flex;align-items:center;gap:8px;padding:0 12px 22px}.orbit-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}.primary-nav{display:grid;gap:5px}.nav-button{display:flex;align-items:center;gap:12px;width:100%;min-height:44px;padding:9px 12px;background:none;border:1px solid transparent;border-radius:8px;text-align:left;color:var(--muted)}.nav-button .nav-num{font-size:12px;margin-left:auto;opacity:.8}.nav-button.active{background:var(--accent-soft);color:var(--accent);border-color:rgba(89,212,242,.16)}.nav-button:hover,.topic-button:hover{background:var(--panel)}.nav-heading{padding:30px 12px 12px;color:var(--dim);font-size:12px}.topic-nav{display:grid;gap:3px}.topic-button{display:flex;align-items:center;justify-content:space-between;text-align:left;border:0;border-left:2px solid transparent;background:none;color:var(--muted);padding:9px 12px;min-height:40px;border-radius:0 6px 6px 0;font-size:13px}.topic-button span:last-child{font-size:11px;color:var(--dim)}.topic-button.active{background:var(--panel-raised);border-left-color:var(--accent);color:var(--text)}.sidebar-foot{margin-top:auto;padding:24px 10px 0}.sidebar-foot button{font-size:12px;color:var(--accent);background:none;border:0;padding:6px 0;text-align:left}.sidebar-foot p{font-size:11px;line-height:1.8;color:var(--dim);margin:8px 0}.workspace{display:grid;grid-template-columns:365px minmax(0,1fr);min-height:0;min-width:0}.catalog-pane{border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0;background:var(--base)}.catalog-head{padding:27px 24px 0}.catalog-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.catalog-title h1{font-size:21px;line-height:1.3;margin:0;font-weight:650}.count-pill{background:var(--panel-raised);color:var(--accent);border:1px solid var(--border);border-radius:6px;padding:1px 8px;font-size:12px}.search-box{display:flex;align-items:center;gap:9px;border:1px solid var(--border);border-radius:8px;padding:0 11px;background:var(--inset);height:46px}.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 2px rgba(89,212,242,.08)}.search-box input{width:100%;min-width:0;background:none;border:0;color:var(--text);outline:none;font-size:13px;height:44px}.search-box input::placeholder{color:var(--dim)}.search-box span{color:var(--accent);height:19px}.search-box kbd{border:1px solid var(--border);border-radius:4px;color:var(--dim);width:20px;text-align:center;font:11px/20px inherit}.filters{display:flex;align-items:center;gap:7px;margin-top:12px}.filters label{min-width:0;flex:1}.filters select{width:100%;padding:7px 5px;background:var(--panel);border:1px solid var(--border);color:var(--muted);border-radius:5px;font-size:12px;height:36px}.filters .icon-button{width:32px;min-width:32px;height:36px;border-radius:5px}.search-status{font-size:11px;color:var(--dim);margin:12px 0 14px;min-height:18px}.course-list{overflow-y:auto;flex:1;padding:0 12px 16px;scrollbar-width:thin;scrollbar-color:var(--panel-raised) transparent}.course-card{position:relative;width:100%;border:1px solid transparent;border-radius:9px;background:none;padding:17px 12px;margin:0 0 5px;text-align:left;display:block;color:var(--text)}.course-card+.course-card::before{content:'';position:absolute;top:-3px;left:12px;right:12px;height:1px;background:var(--line)}.course-card:hover{background:var(--panel)}.course-card.selected{background:var(--panel);border-color:rgba(89,212,242,.38)}.course-card.selected::after{content:'';position:absolute;top:18px;bottom:18px;left:-1px;width:2px;background:var(--accent);border-radius:2px}.course-date{font-size:11px;color:var(--dim);display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px}.course-date .dot-read{width:5px;height:5px;border-radius:50%;display:inline-block;background:var(--success);margin-right:6px}.course-card h2{font-size:15px;font-weight:600;line-height:1.65;margin:0 0 8px}.course-card p{font-size:12px;color:var(--muted);line-height:1.8;margin:0 0 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ease-out}.reader-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:32px;font-size:12px;color:var(--dim)}.reader-tools{display:flex;gap:8px}.reader-tools button{display:flex;align-items:center;gap:7px;padding:6px 10px;min-height:36px;border:1px solid var(--border);border-radius:6px;background:var(--panel);color:var(--muted);font-size:12px}.reader-tools button.saved{color:var(--gold)}.back-button{display:none}.reader-date{font-size:12px;color:var(--accent);display:flex;gap:12px;flex-wrap:wrap;align-items:center}.reader-date::before{content:'';height:1px;width:28px;background:var(--accent)}.reader h1{font-size:clamp(25px,2.5vw,35px);line-height:1.5;margin:14px 0 17px;letter-spacing:.3px;font-weight:650}.topic-pills{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}.topic-pills button{background:var(--panel-raised);border:1px solid var(--border);border-radius:5px;font-size:11px;padding:4px 8px;color:var(--muted)}.topic-pills button:hover{color:var(--accent);border-color:var(--accent)}.lesson-overview{border-left:2px solid var(--accent);padding:3px 0 3px 18px;margin:26px 0}.lesson-overview p{font-size:16px;line-height:1.9;margin:0;color:var(--text)}.coverage-note{display:flex;align-items:flex-start;gap:9px;padding:12px 14px;margin:20px 0 28px;background:var(--panel);border:1px solid var(--border);border-radius:7px;color:var(--muted);font-size:12px;line-height:1.8}.coverage-note .icon{flex:0 0 auto;width:16px;height:16px;margin-top:3px;color:var(--gold)}.lesson-nav{display:flex;gap:20px;border-bottom:1px solid var(--border);margin:28px 0 25px;overflow-x:auto}.lesson-nav a{white-space:nowrap;text-decoration:none;color:var(--muted);font-size:13px;padding:0 0 12px}.lesson-nav a:first-child{color:var(--accent);border-bottom:2px solid var(--accent)}.section-title{display:flex;align-items:center;gap:12px;font-size:20px;margin:34px 0 20px}.section-title small{font-size:11px;color:var(--dim);font-weight:400}.point{margin:0 0 26px;padding:0 0 26px;border-bottom:1px solid var(--line);scroll-margin-top:15px}.point-head{display:flex;gap:12px;align-items:baseline}.point-num{font-size:11px;color:var(--accent);font-variant-numeric:tabular-nums;min-width:20px}.point h3{font-size:17px;margin:0 0 10px;font-weight:600;line-height:1.7}.point-body{padding-left:32px}.point-body p{font-size:16px;color:var(--muted);line-height:1.9;margin:0 0 12px}.point-kind{font-size:10px;color:var(--dim);margin-top:7px}.refs{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}.ref-button{border:1px solid rgba(235,203,139,.22);color:var(--gold);background:transparent;border-radius:4px;padding:4px 7px;font-size:10px;max-width:100%;overflow-wrap:anywhere;text-align:left}.ref-button:hover{background:var(--panel-raised)}.chapter{margin:18px 0;border:1px solid var(--border);border-radius:8px;background:var(--panel)}.chapter summary{padding:16px 18px;cursor:pointer;font-size:15px;font-weight:550}.chapter[open] summary{border-bottom:1px solid var(--line);color:var(--accent)}.chapter-content{padding:18px 22px;color:var(--muted);font-size:16px;line-height:1.9;overflow-wrap:anywhere}.chapter-content p{margin:0 0 16px}.chapter-content h3,.chapter-content h4{color:var(--text);font-size:17px;margin:24px 0 12px}.chapter-content ul,.chapter-content ol{padding-left:22px}.chapter-content li{margin:8px 0}.chapter-content strong{color:var(--text);font-weight:600}.chapter-content blockquote{border-left:2px solid var(--gold);margin:18px 0;padding:0 15px;color:var(--gold)}.data-table{max-width:100%;overflow-x:auto;margin:20px 0}.data-table table{border-collapse:collapse;font-size:13px;min-width:450px}.data-table td,.data-table th{border:1px solid var(--border);padding:9px 12px;text-align:left;vertical-align:top}.data-table th{background:var(--panel-raised);color:var(--text)}.risk-list{list-style:none;padding:0;margin:0}.risk-list li{padding:12px 0 12px 18px;border-left:2px solid rgba(235,203,139,.4);margin:12px 0;color:var(--muted);font-size:14px;line-height:1.8}.sources-list{display:grid;gap:8px;margin-bottom:25px}.source-row{border:1px solid var(--border);background:var(--panel);border-radius:5px;padding:11px 13px;font-size:12px;overflow-wrap:anywhere}.source-row strong{color:var(--gold);margin-right:8px}.source-row span{color:var(--muted)}.related{display:grid;gap:9px}.related button{display:flex;align-items:center;gap:13px;text-align:left;border:1px solid var(--border);border-radius:7px;background:var(--panel);padding:14px;color:var(--text);font-size:13px}.related button:hover{border-color:var(--accent)}.related time{font-size:11px;color:var(--dim);white-space:nowrap}.reading-footer{margin-top:35px;padding-top:20px;border-top:1px solid var(--border);font-size:11px;color:var(--dim);line-height:1.8}.empty,.loading{text-align:center;padding:65px 20px;color:var(--muted)}.empty .icon{width:35px;height:35px;color:var(--dim)}.empty h2,.loading h2{font-size:19px;color:var(--text);margin:20px 0 12px}.empty p,.loading p{font-size:13px}.empty button{padding:9px 16px;border:1px solid var(--accent);color:var(--accent);background:none;border-radius:6px;margin-top:12px}.loading-orbit{width:40px;height:40px;border:1px solid var(--border);border-top-color:var(--accent);border-radius:50%;margin:auto;animation:spin 1.2s linear infinite}.info-dialog{background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:12px;width:min(680px,calc(100vw - 32px));max-height:85dvh;padding:25px;overflow:auto}.info-dialog::backdrop{background:rgba(0,5,14,.75)}.dialog-header{display:flex;align-items:center;justify-content:space-between;gap:15px;border-bottom:1px solid var(--border);padding-bottom:15px;margin-bottom:20px}.dialog-header h2{font-size:20px;margin:0}.info-dialog h3{font-size:16px;color:var(--accent);margin-top:25px}.info-dialog p,.info-dialog li{font-size:14px;color:var(--muted);line-height:1.9;overflow-wrap:anywhere}.info-dialog blockquote{border-left:2px solid var(--gold);margin:20px 0;padding-left:15px;color:var(--text)}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:12px 20px;background:var(--panel-raised);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:13px;z-index:100;box-shadow:0 8px 30px rgba(0,0,0,.2);max-width:90vw}.nav-scrim{position:fixed;inset:var(--header) 0 0;background:rgba(0,0,0,.55);z-index:5}.source-hint{font-size:12px;color:var(--dim);line-height:1.8}.source-hint strong{color:var(--gold);font-weight:400}@keyframes spin{to{transform:rotate(360deg)}}@keyframes reveal{from{opacity:.5;transform:translateY(3px)}to{opacity:1;transform:none}}
@media(min-width:1700px){.workspace{grid-template-columns:410px minmax(0,1fr)}.reader{padding-left:70px;padding-right:70px}.point-body p{font-size:17px}}
@media(max-width:1180px){:root{--side:185px}.top-purpose{display:none}.workspace{grid-template-columns:310px minmax(0,1fr)}.reader{padding:25px 28px 50px}.catalog-head{padding:24px 18px 0}.sidebar{padding-left:10px;padding-right:10px}.brand-sub{font-size:15px}.point-body{padding-left:0}.point-head{gap:7px}.reader h1{font-size:27px}}
@media(max-width:1000px){:root{--side:0px}.sidebar{display:none;position:fixed;left:0;top:var(--header);bottom:0;width:230px;z-index:10;border-right:1px solid var(--border)}.sidebar.open{display:flex}.menu-toggle{display:inline-flex}.topbar{padding:0 18px;gap:13px}.app-shell{display:block}.workspace{height:100%;grid-template-columns:310px minmax(0,1fr)}}
@media(max-width:760px){:root{--header:62px}.topbar{padding:0 12px;gap:9px}.brand{font-size:19px;gap:8px}.brand img{width:29px;height:29px}.brand-sub{font-size:13px;margin-left:7px}.top-actions{gap:7px}.version{display:none}.icon-button{width:36px;min-width:36px;height:38px}.workspace{display:block}.catalog-pane{height:100%;border:0}.catalog-head{padding:23px 20px 0}.catalog-title h1{font-size:24px}.search-box input{font-size:15px}.filters select{font-size:13px;min-height:40px}.search-status{font-size:12px}.course-list{padding:0 12px 20px}.course-card{padding:18px 14px}.course-card h2{font-size:17px}.course-card p{font-size:13px;-webkit-line-clamp:3}.course-date{font-size:12px}.course-mini{font-size:11px}.reader{display:none;height:100%;padding:20px 22px 45px}.detail-mobile .catalog-pane{display:none}.detail-mobile .reader{display:block}.reader-toolbar{margin-bottom:26px;gap:8px}.reader-toolbar>.toolbar-label{display:none}.back-button{display:inline-flex;border:0;color:var(--accent);background:none;align-items:center;gap:3px;padding:8px 0;font-size:13px}.reader-tools button{padding:7px 9px;min-height:40px}.reader-tools button .tool-text{display:none}.reader h1{font-size:28px;line-height:1.55}.reader-date{font-size:12px}.lesson-overview p{font-size:16px}.lesson-nav{gap:20px}.point h3{font-size:18px}.point-body p,.chapter-content{font-size:16px}.chapter-content{padding:15px 16px}.related button{display:block}.related time{display:block;margin-bottom:5px}.topic-button{min-height:43px}.nav-button{min-height:46px}.topbar .icon-button{border-color:transparent}.info-dialog{padding:20px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important;transition:none!important}}
@media print{.topbar,.sidebar,.catalog-pane,.reader-toolbar,.lesson-nav,.toast{display:none!important}.app-shell,.workspace{display:block;height:auto}.reader{display:block!important;overflow:visible;padding:0;background:white;color:#16243a}.reader-wrap{max-width:100%}:root{--text:#16243a;--muted:#374a63;--panel:white;--panel-raised:#eef1f5;--border:#ccc;--line:#ddd;--accent:#006b89;--gold:#76531c}.point,.chapter{break-inside:avoid}.chapter-content{display:block}}
.point-body p.point-caveat{font-size:14px;color:var(--dim)}.share-url{user-select:all;word-break:break-all}@media(max-width:760px){.ref-button{min-height:40px;padding:8px 10px}.topic-pills button{min-height:36px}}