.book-page .intro,.book-page section[aria-label="书架"]{display:none}.book-page #reader{margin-top:16px;padding-top:0;border:0}.book-page #message:empty{display:none}.book-page .sectionhead{align-items:start}.book-page #book-title{margin:12px 0 0}.book-page #book-meta{margin-bottom:24px}.reading-nav{margin-top:24px;padding:16px 0;gap:8px}.reader-section{padding:40px 0;border-bottom:1px solid var(--line);scroll-margin-top:24px}.reader-section>h2{margin-bottom:20px}.reader-section p{max-width:76ch;line-height:1.95;white-space:pre-wrap;overflow-wrap:anywhere}.reader-section h3{margin:28px 0 12px}.reading-map{display:grid;gap:28px}.route-group{padding-top:8px}.chapter-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;align-items:start}.chapter-card{padding:0;border:1px solid var(--line);border-radius:12px;background:var(--bright);min-width:0}.chapter-card summary{display:flex;flex-direction:column;padding:16px;min-height:100px;font-family:var(--sans);font-size:16px;gap:8px}.chapter-card summary:after{content:'展开精读 ↓';font-size:13px;color:var(--moss)}.chapter-card[open]{grid-column:1/-1}.chapter-card[open] summary{min-height:0;border-bottom:1px solid var(--line)}.chapter-card[open] summary:after{content:'收起 ↑'}.chapter-number{font-size:13px;color:var(--soft)}.chapter-body{padding:4px 24px 24px}.chapter-body h4{margin-bottom:8px}.source-links{display:flex;gap:8px 16px;flex-wrap:wrap;font-size:13px;margin:16px 0}.source-links a{overflow-wrap:anywhere;max-width:100%}.research-topic{padding:20px 0}.research-topic summary{font-size:22px}.research-prose{max-width:80ch;padding:8px 0}.source-row{padding:12px 0 24px;border-bottom:1px solid var(--line);scroll-margin-top:24px}.source-row h3{font:600 17px/1.6 var(--sans)}.source-row p{font-size:14px;color:var(--soft)}.podcast-turn p{padding:0 8px}.reader-disclaimer{font-size:13px;line-height:1.9;color:var(--soft);margin:32px 0;max-width:90ch}#concept-detail{padding:24px;background:#eaf1f4;color:#183747;border-radius:0 0 12px 12px}#concept-detail h3{margin:0 0 12px}#concept-detail p{max-width:76ch;line-height:1.9}#graph-frame{height:580px}.book-page #content{padding:0;max-width:none}.book-page .learning-workspace{max-width:none}@media(max-width:760px){.chapter-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.chapter-body{padding:0 16px 16px}.reader-section{padding:28px 0}.reading-nav button{font-size:13px;padding:8px 10px}#graph-frame{height:500px}}@media(max-width:380px){.chapter-grid{grid-template-columns:1fr}}

.book{text-decoration:none}.book-page #reader .sectionhead a{font-size:14px}

.reader-notes-stack .note-section-title{display:none}.reader-notes-stack>section{padding:40px 0;border-bottom:1px solid var(--line);scroll-margin-top:24px}.reader-notes-stack>section>h3{font:600 28px/1.45 var(--serif);margin:0 0 20px}.framework-map{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.framework-step{border:1px solid var(--line);border-radius:12px;padding:20px;background:var(--bright);min-width:0}.framework-step:last-child{grid-column:1/-1}.framework-step h3{margin:8px 0 12px}.framework-step small,.framework-transition{color:var(--soft)}.framework-step .source-links{max-height:none;overflow:visible}@media(max-width:700px){.framework-map{grid-template-columns:1fr}.reader-notes-stack>section{padding:28px 0}}

/* Natural document flow: the page owns vertical scrolling. */
body.book-page{min-height:100dvh;overflow:visible;display:block}.book-page>header{width:100%;padding:12px 24px;flex:none}.book-page>main{width:100%;padding-bottom:40px;display:block}.book-page>footer{display:none}.book-page #reader{display:block;margin-top:0}.book-page #reader>.sectionhead{margin:12px 0 0;flex:none}.book-page #book-title{font-size:28px;margin:4px 0}.book-page #book-meta{font-size:13px;margin:0}.book-page #book-introduction{font-size:14px;color:var(--soft);margin:4px 0 8px}.reading-nav{flex:none;margin:0;padding:10px 0;gap:6px}.reading-nav button{font-size:14px;padding:7px 12px}.book-page #reader-stage{min-height:0;overflow:visible;padding-bottom:20px}.book-page #reader-stage .reader-section{padding:24px 0;border:0}.book-page #graph-panel{height:100%;min-height:340px}.book-page #graph-frame{height:100%;min-height:340px}.book-page #concept-detail{position:relative}.reader-notes-stack>section{padding:24px 0}.reader-notes-stack>.note-caption,.reader-notes-stack>.note-tools{display:none}.reader-disclaimer{border-top:1px solid var(--line);padding-top:20px}.book-page .reading-nav{overflow-x:auto;flex-wrap:nowrap;max-width:100%;scrollbar-width:thin}.reading-nav button{white-space:nowrap}.book-page #contribution{overflow:visible}@media(max-width:640px){.book-page>header{padding:8px 18px}.book-page #book-title{font-size:23px}.book-page #book-meta{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}.book-page #book-introduction{font-size:12px}.reading-nav button{font-size:13px}.book-page #reader>.sectionhead a{font-size:12px}}

.research-map{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:24px 0}.research-map button{text-align:left;white-space:normal;font-size:15px;line-height:1.6;padding:15px;min-height:90px}.research-prose{max-width:80ch}.podcast-segment{display:grid;grid-template-columns:60px minmax(0,1fr);gap:22px;padding:22px 0;border-bottom:1px solid var(--line)}.podcast-segment time{font-variant-numeric:tabular-nums;color:var(--soft);padding-top:7px;font-size:14px}.podcast-segment p{margin-top:0}.podcast-timeline{margin-top:24px}#read-podcast textarea{width:100%;font:inherit}@media(max-width:640px){.research-map{display:flex;overflow-x:auto;flex-wrap:nowrap;padding-bottom:8px;scroll-snap-type:x proximity}.research-map button{flex:0 0 185px;scroll-snap-align:start}.podcast-segment{grid-template-columns:42px minmax(0,1fr);gap:12px}}
.book-page #reader-stage{overflow-x:clip;overflow-y:visible}
#read-overview{max-width:80ch}#read-overview p{font-size:17px;line-height:2;margin:1.4em 0}#read-overview strong{text-decoration:underline;text-decoration-color:#91ac97;text-decoration-thickness:2px;text-underline-offset:5px;color:#253f37}
#read-podcast{display:grid;grid-template-columns:minmax(0,1fr) 250px;column-gap:40px;align-items:start}#read-podcast[hidden]{display:none}#read-podcast>h2{grid-column:1/-1}.podcast-intro{grid-column:1;padding:20px 0 28px;border-bottom:1px solid var(--line)}.podcast-intro>h3{margin-top:0}.podcast-intro audio{width:100%;margin:20px 0 0}.podcast-intro p{font-size:14px;color:var(--soft)}.podcast-feedback{grid-column:2;grid-row:2/4;position:sticky;top:20px;padding:20px 0}.podcast-feedback>h3{font-size:18px;margin:0}.podcast-feedback .community{margin:12px 0;padding:0;border:0}.podcast-feedback .community-bar{display:flex;gap:8px;flex-wrap:wrap}.podcast-feedback textarea{width:100%;min-width:0}.podcast-transcript{grid-column:1}.podcast-transcript>p{font-size:14px;color:var(--soft)}.podcast-transcript .podcast-segment{padding:20px 0;border-bottom:1px solid var(--line)}.podcast-transcript .podcast-segment p{margin:0 0 16px;font-size:16px}.podcast-transcript time{font-variant-numeric:tabular-nums;color:var(--soft);padding-top:5px}@media(max-width:800px){#read-podcast{grid-template-columns:minmax(0,1fr);gap:0}.podcast-feedback{grid-column:1;grid-row:3;position:static;display:flex;align-items:start;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding:16px 0}.podcast-feedback .community{flex:1}.podcast-feedback .community-bar{justify-content:flex-end}.podcast-transcript{grid-row:4}.podcast-intro{padding-top:0}}

/* Category-reader layout: book rail and one shared content stage. */
.book-page>main{max-width:1480px;padding-inline:32px}.book-page #reader{display:grid;grid-template-columns:252px minmax(0,1fr);gap:clamp(28px,4vw,64px);align-items:start}.reader-sidebar{position:sticky;top:12px;max-height:calc(100dvh - 24px);overflow:auto;scrollbar-width:thin;padding:20px 22px 24px 0;border-right:1px solid var(--line);min-width:0}.reader-sidebar #book-identity{display:flex;flex-direction:column;align-items:start;gap:10px}.reader-sidebar .reader-jacket{width:112px;height:164px;flex:none;overflow:hidden;position:relative}.reader-sidebar .reader-jacket img{width:100%;height:100%;object-fit:contain;position:absolute;inset:0}.reader-sidebar .contributor-info>.contributor-byline,.reader-sidebar .contributor-info>details{display:none}.reader-sidebar .contributor-info{font-size:11px;flex:0 0 auto}.reader-sidebar .book-share{font-size:12px;padding:5px 10px}.reader-sidebar .sectionhead{margin-top:18px}.book-page .reader-sidebar #book-title{font-size:26px;line-height:1.45}.reader-sidebar #book-meta{margin:10px 0;font-size:12px;overflow-wrap:anywhere}.reader-sidebar #book-introduction{display:none}.book-page .reader-sidebar .reading-nav{display:flex;flex-direction:column;align-items:stretch;overflow:visible;gap:3px;padding:18px 0;margin:0}.reader-sidebar .reading-nav button{width:100%;text-align:left;border:0;border-radius:6px;white-space:normal;padding:9px 12px}.reader-sidebar .reading-nav button[aria-selected=true]{background:var(--moss);color:white}.book-page #reader-stage{padding-top:24px;min-width:0;overflow:visible}.book-page #graph-panel{height:auto;min-height:0}.book-page #reader-stage #graph-frame{width:100%;height:clamp(460px,70vh,850px);min-height:0}.reader-sidebar~.reader-disclaimer{grid-column:2}.reading-carousel{border-top:1px solid var(--line);padding-top:20px;margin-top:12px}.reading-carousel[hidden]{display:none}.reading-carousel-body{min-height:220px;overflow-wrap:anywhere}.reading-carousel h2{font:600 13px/1.6 var(--sans);margin:0 0 12px;color:var(--soft)}.reading-carousel-text{font-size:15px;line-height:1.85;margin:0 0 12px;white-space:pre-wrap}.reading-carousel small{display:block;font-size:11px;line-height:1.8;color:var(--soft)}.reading-carousel .carousel-source{font-size:11px;padding:4px 0;background:none;border:0;text-decoration:underline;text-underline-offset:3px}.reading-carousel-controls{display:flex;align-items:center;gap:5px;flex-wrap:wrap;margin-top:12px}.reading-carousel-controls[hidden]{display:none}.reading-carousel-controls button{font-size:11px;padding:5px 7px;min-height:32px}.reading-carousel-controls span{font-size:11px;color:var(--soft);font-variant-numeric:tabular-nums}.reading-carousel-controls button:last-child{margin-left:auto}.book-page #read-podcast{grid-template-columns:minmax(0,1fr)}.book-page .podcast-feedback{grid-column:1;grid-row:auto;position:static}.book-page .podcast-transcript{grid-column:1}.book-page .chapter-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
@media(max-width:760px){.book-page>main{padding-inline:20px}.book-page #reader{display:block}.reader-sidebar{position:static;max-height:none;overflow:visible;border:0;padding:18px 0 0;display:grid;grid-template-columns:90px minmax(0,1fr);gap:4px 18px}.reader-sidebar #book-identity{grid-column:1;grid-row:1/4}.reader-sidebar .reader-jacket{width:84px;height:124px}.reader-sidebar .contributor-info{display:none}.reader-sidebar .sectionhead{grid-column:2;margin:0}.reader-sidebar #book-meta{grid-column:2}.book-page .reader-sidebar #book-title{font-size:24px}.book-page .reader-sidebar .reading-nav{grid-column:1/-1;flex-direction:row;overflow-x:auto;flex-wrap:nowrap;margin:14px -20px 0;padding:12px 20px;border-block:1px solid var(--line)}.reader-sidebar .reading-nav button{width:auto;white-space:nowrap;flex:none}.reader-sidebar-carousel{grid-column:1/-1}.reading-carousel{padding-top:15px;margin-top:6px;border-top:0}.reading-carousel-body{min-height:0}.reading-carousel-text{font-size:14px}.reading-carousel-controls button{min-height:40px}.reading-carousel-controls{justify-content:flex-start}.book-page #reader-stage{padding-top:8px}.book-page #reader-stage #graph-frame{height:65vh;min-height:380px}.book-page .chapter-grid{grid-template-columns:minmax(0,1fr)}}

.reader-sidebar #book-identity{position:relative}.reader-sidebar #book-identity .book-share{position:absolute;top:0;right:0;min-height:32px}.reader-sidebar .reader-jacket{font-size:20px;line-height:1.7;padding:16px 12px}.reader-sidebar .reading-carousel{border-top:0;margin-top:0}.reader-sidebar .sectionhead{margin-top:8px}.book-page .reader-sidebar .reading-nav{padding:12px 0}.reader-sidebar .reading-nav button{padding:7px 12px;min-height:36px}@media(max-width:760px){.reader-sidebar #book-identity .book-share{position:static}.reader-sidebar .reader-jacket{font-size:17px;padding:10px}.book-page .reader-sidebar .reading-nav{padding:12px 20px}}

.reader-sidebar .reading-nav .vip-learning-tab{border:1px solid var(--moss);font-weight:700;margin-bottom:8px}

.section-podcast-preview{margin:0 0 20px;padding:12px 16px;border:1px solid var(--line);border-radius:8px}.section-podcast-preview summary{font:500 14px/1.6 var(--sans);cursor:pointer}.section-podcast-preview textarea{width:100%;font:14px/1.8 var(--sans)}.section-podcast-preview button{margin:10px 10px 0 0}.section-podcast-preview[open]{background:var(--bright)}