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minmax(0,1fr);display:grid;position:fixed;inset:0;overflow:hidden}.reader-shell[dir=rtl]{--reader-safe-inline-start:env(safe-area-inset-right);--reader-safe-inline-end:env(safe-area-inset-left)}.reader-shell-epub{grid-template-rows:auto minmax(0,1fr) auto}.reader-shell-epub[data-reference-visible=true]{grid-template-rows:auto auto minmax(0,1fr) auto}[data-inline-surface=reader] :focus-visible{outline:3px solid var(--reader-focus);outline-offset:2px;box-shadow:0 0 0 1px var(--reader-chrome)}.pdf-shell-loading{min-height:100vh;min-height:100dvh;color:var(--reader-chrome-muted);background:var(--reader-stage);place-items:center;font:600 12px/1 Helvetica Neue,Arial,sans-serif;display:grid}.reader-topbar{min-height:calc(64px + env(safe-area-inset-top));z-index:20;height:auto;padding-block:env(safe-area-inset-top) 0;padding-inline:max(20px, var(--reader-safe-inline-start)) max(20px, var(--reader-safe-inline-end));border-bottom:1px solid var(--reader-chrome-line);color:var(--reader-chrome-ink);background:var(--reader-chrome);grid-template-columns:minmax(88px,1fr) minmax(0,2fr) minmax(88px,1fr);align-items:center;gap:14px;display:grid;position:relative}.back-button{min-width:44px;min-height:44px;color:var(--reader-chrome-muted);background:0 0;border:0;justify-self:start}.back-button:hover{color:var(--reader-accent-strong)}.back-button span:last-child{margin-inline-start:7px;font-size:11px}.reader-title{text-align:center;justify-content:center;align-items:baseline;gap:10px;min-width:0;display:flex}.reader-title small{color:var(--reader-chrome-muted);font:8px SFMono-Regular,monospace}.reader-title strong{text-overflow:ellipsis;white-space:nowrap;max-width:min(520px,100%);font:500 14px Iowan Old Style,Baskerville,Georgia,serif;display:block;overflow:hidden}.reader-actions{justify-self:end;align-items:center;gap:10px;min-width:0;display:flex}.pencil-switch{border:1px solid var(--reader-control-border);border-radius:var(--radius-control);background:var(--reader-control);align-items:center;gap:3px;height:38px;padding:3px;display:flex}.pencil-switch>span{color:var(--reader-chrome-muted);letter-spacing:.04em;padding:0 7px;font:8px/1 SFMono-Regular,monospace}.pencil-switch button{min-width:48px;height:30px;color:var(--reader-chrome-muted);background:0 0;border:0;border-radius:5px;padding:0 9px;font-size:10px}.pencil-switch button:hover{color:var(--reader-chrome-ink)}.pencil-switch button.active{color:var(--reader-action-ink);background:var(--reader-action)}.type-button{border:1px solid var(--reader-control-border);border-radius:var(--radius-control);width:40px;height:40px;color:var(--reader-chrome-ink);background:var(--reader-control);font:600 13px Iowan Old Style,serif}.type-button:hover{border-color:var(--reader-accent-strong);color:var(--reader-accent-strong);background:var(--reader-control-hover)}.toc-button{border:1px solid var(--reader-control-border);border-radius:var(--radius-control);min-width:64px;height:40px;color:var(--reader-chrome-muted);background:var(--reader-control);justify-content:center;align-items:center;gap:6px;padding:0 10px;display:inline-flex}.toc-button span{font-size:17px;line-height:1;transform:translateY(-1px)}.toc-button em{font-size:10px;font-style:normal}.toc-button:hover,.toc-button.active{border-color:var(--reader-accent-strong);color:var(--reader-accent-strong);background:var(--reader-control-hover)}.toc-layer{z-index:40;position:fixed;inset:0}.toc-backdrop{background:var(--reader-backdrop);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);border:0;border-radius:0;width:100%;height:100%;position:absolute;inset:0}.toc-panel{width:min(390px,100vw - 36px);color:var(--reader-chrome-ink);background:var(--reader-chrome);grid-template-rows:auto minmax(0,1fr);display:grid;position:absolute;inset-block:0;inset-inline-start:0;box-shadow:18px 0 56px #070e1438}.reader-shell[dir=rtl] .toc-panel{box-shadow:-18px 0 56px #070e1438}.toc-panel>header{min-height:calc(82px + env(safe-area-inset-top));padding:calc(18px + env(safe-area-inset-top)) 22px 16px;border-bottom:1px solid var(--reader-chrome-line);justify-content:space-between;align-items:flex-end;gap:20px;display:flex}.toc-panel>header small{color:var(--reader-accent-strong);letter-spacing:.15em;margin-bottom:5px;font:7px/1 SFMono-Regular,monospace;display:block}.toc-panel h2{margin:0;font:500 24px/1 Iowan Old Style,Baskerville,Georgia,serif}.toc-panel>header button{width:44px;height:44px;color:var(--reader-chrome-muted);background:0 0;border:0;font-size:24px;font-weight:300}.toc-scroll{overscroll-behavior:contain;min-height:0;padding:12px 0 max(28px, env(safe-area-inset-bottom));overflow-y:auto}.toc-list{margin:0;padding:0;list-style:none}.toc-list button{width:100%;min-height:48px;color:var(--reader-chrome-muted);text-align:start;background:0 0;border:0;border-radius:0;justify-content:space-between;align-items:center;gap:12px;padding:10px 22px;display:flex;position:relative}.toc-list button:before{content:"";background:0 0;width:2px;position:absolute;inset-block:10px;inset-inline-start:0}.toc-list button span{font:400 14px/1.45 Iowan Old Style,Baskerville,Georgia,serif}.toc-list button small{color:var(--reader-accent-strong);letter-spacing:.04em;flex:none;font:7px/1 SFMono-Regular,monospace}.toc-list button:hover{color:var(--reader-chrome-ink);background:color-mix(in srgb, var(--reader-accent) 12%, var(--reader-chrome))}.toc-list button.current{color:var(--reader-chrome-ink);background:color-mix(in srgb, var(--reader-accent) 16%, var(--reader-chrome))}.toc-list button.current:before{background:var(--reader-accent-strong)}.toc-empty{color:var(--reader-chrome-muted);margin:0;padding:34px 22px;font:400 14px/1.6 Iowan Old Style,Baskerville,Georgia,serif}.reader-settings-layer{z-index:30;position:fixed;inset:0}.reader-settings-backdrop{cursor:default;background:0 0;border:0;border-radius:0;width:100%;height:100%;position:absolute;inset:0}.reader-settings{top:calc(64px + env(safe-area-inset-top) - 8px);border:1px solid var(--reader-chrome-line);border-radius:var(--radius-panel);width:244px;color:var(--reader-chrome-ink);background:var(--reader-chrome);padding:14px;position:absolute;inset-inline-end:max(18px, var(--reader-safe-inline-end));box-shadow:0 24px 54px #070e1438}.reader-settings>div{border-bottom:1px solid var(--reader-chrome-line);grid-template-columns:52px repeat(3,1fr);align-items:center;gap:6px;padding:7px 0;display:grid}.reader-settings>div.setting-font-size{grid-template-columns:52px repeat(2,1fr)}.reader-settings>div:last-child{border:0}.reader-settings small{color:var(--reader-chrome-muted);font-size:9px}.reader-settings button{border:1px solid var(--reader-control-border);min-height:32px;color:var(--reader-chrome-muted);background:var(--reader-control);border-radius:6px;font-size:10px}.reader-settings button:hover,.reader-settings button.active{border-color:var(--reader-accent-strong);color:var(--reader-accent-strong);background:var(--reader-control-hover)}.reader-settings button:disabled{border-color:var(--reader-control-border);color:var(--reader-chrome-muted);background:var(--reader-control);opacity:.52;cursor:default}.reader-settings .theme-dot{border-radius:50%;justify-self:center;width:26px;height:26px;min-height:26px}.theme-dot.swatch-paper{background:#eeede8}.theme-dot.swatch-sepia{background:#dfe5d8}.theme-dot.swatch-night{background:#1d2220}.reading-stage{background:var(--reader-stage);min-width:0;min-height:0;padding:30px clamp(20px,3vw,48px) 48px;overflow:auto}.reading-stage.epub-stage{overscroll-behavior:none;padding:clamp(10px,2.8vh,30px) clamp(10px,3vw,48px);display:block;position:relative;overflow:hidden}.paper{max-width:var(--reader-page-width,760px);min-height:calc(100dvh - 124px);color:var(--reader-page-ink);background:var(--reader-page);-webkit-user-select:text;user-select:text;margin:auto;padding:clamp(50px,6vw,74px) clamp(38px,5vw,68px);box-shadow:0 24px 70px #2f42462e}.reading-stage[data-reader-page-width="860"] .paper{padding-inline:max(clamp(38px, 5vw, 68px), calc((50vw - var(--reader-line-measure,720px)) / 2))}.paper-sepia,.paper-night{color:var(--reader-page-ink);background:var(--reader-page)}.paper-night{box-shadow:0 24px 70px var(--reader-shadow)}.paper h1{border-bottom:1px solid var(--reader-chrome-line);letter-spacing:-.04em;text-wrap:balance;margin:0 0 34px;padding-bottom:24px;font:500 clamp(34px,4vw,50px)/1.08 Iowan Old Style,Baskerville,Georgia,serif}.reading-columns{column-count:2;column-rule:1px solid #4f606333;column-gap:clamp(48px,6vw,78px)}.paper p{font:400 var(--reader-font-size,20px)/var(--reader-line-height,1.55) "Iowan Old Style", Baskerville, Georgia, serif;font-kerning:normal;orphans:2;widows:2;text-wrap:pretty}.paper[data-dawn-typography-mode=dawn][data-dawn-text-align=justify] p{text-align:justify;-webkit-hyphens:auto;hyphens:auto;hyphenate-limit-chars:6 3 3}.paper[data-dawn-typography-mode=dawn][data-dawn-text-align=start] p{text-align:start;-webkit-hyphens:none;hyphens:none}.paper[data-dawn-typography-mode=dawn][data-dawn-paragraph-style=book] p{text-indent:1.25em;margin:0}.paper[data-dawn-typography-mode=dawn][data-dawn-paragraph-style=book] p:first-child{text-indent:0}.paper[data-dawn-typography-mode=dawn][data-dawn-paragraph-style=spaced] p{text-indent:0;margin:0 0 .75em}.paper[data-dawn-typography-mode=publisher] p{margin:0 0 1.28em}.paper ::selection{color:var(--reader-selection-ink);background:var(--reader-selection)}.paper-night .reading-columns{column-rule-color:var(--reader-chrome-line)}.epub-frame{isolation:isolate;background:var(--reader-page);touch-action:pan-y pinch-zoom;overscroll-behavior:none;border-radius:2px;width:100%;height:100%;min-height:0;margin:auto;position:relative;overflow:hidden;box-shadow:0 24px 70px #2f42462e}.epub-renderer-slot{transform:translateX(-50%) scale(var(--epub-slot-scale,1));transform-origin:top;visibility:hidden;pointer-events:none;z-index:0;position:absolute;top:0;left:50%;overflow:hidden}.epub-renderer-slot[data-epub-slot-state=staging]{visibility:hidden;pointer-events:none;z-index:1}.epub-renderer-slot[data-epub-slot-state=ready]{visibility:visible;pointer-events:none;z-index:1}.epub-renderer-slot[data-epub-slot-state=active]{visibility:visible;pointer-events:auto;z-index:2}.epub-renderer-slot[data-epub-slot-state=inactive]{visibility:hidden;pointer-events:none;z-index:0}.epub-renderer-slot>.epub-container{width:100%!important;height:100%!important}.epub-resume-status{z-index:3;color:var(--reader-chrome-muted);letter-spacing:.04em;pointer-events:none;place-items:center;padding:24px;font:500 10px/1.4 SFMono-Regular,monospace;display:grid;position:absolute;inset:0}.epub-resume-status.is-error{pointer-events:auto;text-align:center;letter-spacing:0}.epub-resume-status.is-error>div{border:1px solid var(--reader-chrome-line);background:var(--reader-chrome);border-radius:12px;width:min(420px,100% - 32px);padding:28px;box-shadow:0 18px 52px #18232733}.epub-resume-status.is-error h2{color:var(--reader-chrome-ink);margin:0 0 10px;font:600 22px/1.2 Iowan Old Style,Baskerville,Georgia,serif}.epub-resume-status.is-error p{color:var(--reader-chrome-ink);margin:0 0 8px;font:500 12px/1.55 -apple-system,BlinkMacSystemFont,sans-serif}.epub-resume-status.is-error span{color:var(--reader-chrome-muted);font:400 10px/1.5 -apple-system,BlinkMacSystemFont,sans-serif;display:block}.epub-resume-status.is-error nav{justify-content:center;gap:8px;margin-top:20px;display:flex}.epub-resume-status.is-error button{border:1px solid var(--reader-control-border);border-radius:var(--radius-control);min-height:42px;color:var(--reader-chrome-ink);background:var(--reader-control);padding:0 16px}.epub-resume-status.is-error button:hover{border-color:var(--reader-accent-strong);color:var(--reader-accent-strong);background:var(--reader-control-hover)}.epub-renderer-slot iframe{touch-action:pan-y pinch-zoom;overscroll-behavior:none}.epub-sepia,.epub-night{background:var(--reader-page)}.epub-night{box-shadow:0 24px 70px var(--reader-shadow)}.reader-bottombar{min-width:0;min-height:calc(64px + env(safe-area-inset-bottom));z-index:18;padding:9px max(20px, env(safe-area-inset-right)) max(9px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));border-top:1px solid var(--reader-chrome-line);color:var(--reader-chrome-ink);background:var(--reader-chrome);align-items:center;display:grid;position:relative}.page-controls{grid-template-columns:auto minmax(190px,360px) auto;justify-content:center;align-items:center;gap:18px;width:100%;min-height:44px;margin:0 auto;display:grid}.page-controls button{border:1px solid var(--reader-control-border);border-radius:var(--radius-control);min-width:44px;min-height:44px;color:var(--reader-chrome-ink);background:var(--reader-control);padding:8px 12px}.page-controls button:hover{border-color:var(--reader-accent-strong);color:var(--reader-accent-strong);background:var(--reader-control-hover)}.progress-scrubber{grid-template-columns:minmax(90px,1fr) auto;align-items:center;gap:10px;display:grid}.progress-scrubber input{width:100%;height:44px;accent-color:var(--reader-accent-strong);margin:-12px 0}.page-position{min-width:76px;color:var(--reader-chrome-muted);white-space:nowrap;justify-content:flex-end;align-items:baseline;gap:7px;display:inline-flex}.page-position b{letter-spacing:-.03em;font:500 9px/1 SFMono-Regular,monospace}.page-position small{border-inline-start:1px solid var(--reader-chrome-line);color:var(--reader-chrome-muted);padding-inline-start:7px;font:7px/1 SFMono-Regular,monospace}.image-viewer{border:1px solid var(--reader-chrome-line);width:min(1180px,100vw - 32px);max-width:none;height:min(900px,100dvh - 32px);max-height:none;color:var(--reader-chrome-ink);background:var(--reader-chrome);border-radius:14px;margin:auto;padding:0;overflow:hidden;box-shadow:0 32px 110px #0d15196b}.image-viewer::backdrop{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#0c1215b8}.image-viewer>header{border-bottom:1px solid var(--reader-chrome-line);justify-content:space-between;align-items:center;gap:20px;min-height:68px;padding:12px 14px 12px 20px;display:flex}.image-viewer>header>div:first-child{min-width:0}.image-viewer>header small{color:var(--reader-accent-strong);letter-spacing:.12em;margin-bottom:4px;font:700 8px/1 SFMono-Regular,monospace;display:block}.image-viewer h2{text-overflow:ellipsis;white-space:nowrap;max-width:62ch;margin:0;font:500 15px/1.3 Iowan Old Style,Baskerville,Georgia,serif;overflow:hidden}.image-viewer-actions{align-items:center;gap:7px;display:flex}.image-viewer-actions button,.image-viewer-actions a{border:1px solid var(--reader-control-border);border-radius:var(--radius-control);min-height:42px;color:var(--reader-chrome-ink);background:var(--reader-control);white-space:nowrap;justify-content:center;align-items:center;padding:0 13px;font-size:10px;text-decoration:none;display:inline-flex}.image-viewer-actions button:hover,.image-viewer-actions a:hover{border-color:var(--reader-accent-strong);color:var(--reader-accent-strong);background:var(--reader-control-hover)}.image-viewer-actions .image-viewer-close{background:0 0;border-color:#0000;width:44px;padding:0;font-size:24px}.image-viewer-canvas{background:var(--reader-stage);justify-content:center;align-items:center;height:calc(100% - 68px);padding:22px;display:flex;overflow:hidden}.image-viewer.has-caption .image-viewer-canvas{height:calc(100% - 126px)}.image-viewer-canvas img{object-fit:contain;-webkit-user-select:none;user-select:none;-webkit-user-drag:none;width:auto;max-width:100%;height:auto;max-height:100%;display:block}.image-viewer-error{text-align:center;place-content:center;gap:8px;min-height:180px;display:grid}.image-viewer-error strong{font:500 19px/1.2 Iowan Old Style,Baskerville,Georgia,serif}.image-viewer-error span,.image-viewer-caption{color:var(--reader-chrome-muted)}.image-viewer-caption{inset-inline:20px;text-overflow:ellipsis;white-space:nowrap;max-width:min(72ch,100% - 40px);margin:0;font-size:10px;line-height:1.4;position:absolute;bottom:14px;overflow:hidden}.embed-viewer{border:1px solid var(--reader-chrome-line);width:min(980px,100vw - 32px);max-width:none;color:var(--reader-chrome-ink);background:#0d1113;border-radius:14px;margin:auto;padding:0;overflow:hidden;box-shadow:0 32px 110px #0d15197a}.embed-viewer::backdrop{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#0c1215c2}.embed-viewer>header{border-bottom:1px solid var(--reader-chrome-line);background:var(--reader-chrome);justify-content:space-between;align-items:center;gap:20px;min-height:66px;padding:10px 12px 10px 18px;display:flex}.embed-viewer>header>div:first-child{min-width:0}.embed-viewer>header small{color:var(--reader-accent-strong);letter-spacing:.12em;margin-bottom:4px;font:700 8px/1 SFMono-Regular,monospace;display:block}.embed-viewer h2{text-overflow:ellipsis;white-space:nowrap;margin:0;font:500 15px/1.3 Iowan Old Style,Baskerville,Georgia,serif;overflow:hidden}.embed-viewer>header>div:last-child{align-items:center;gap:6px;display:flex}.embed-viewer>header a,.embed-viewer>header button{border:1px solid var(--reader-control-border);border-radius:var(--radius-control);min-height:42px;color:var(--reader-chrome-ink);background:var(--reader-control);justify-content:center;align-items:center;padding:0 12px;font-size:10px;text-decoration:none;display:inline-flex}.embed-viewer>header button{background:0 0;border-color:#0000;width:44px;padding:0;font-size:24px}.embed-viewer>iframe{aspect-ratio:16/9;background:#000;border:0;width:100%;height:auto;display:block}@media (max-width:700px){.image-viewer{border:0;border-radius:0;width:100vw;height:100dvh}.image-viewer>header{min-height:64px;padding:max(8px, env(safe-area-inset-top)) 8px 8px 14px}.image-viewer h2{max-width:32vw}.image-viewer-actions{gap:4px}.image-viewer-actions button,.image-viewer-actions a{min-height:44px;padding:0 9px}.image-viewer-canvas{height:calc(100% - 64px);padding:10px}.image-viewer.has-caption .image-viewer-canvas{height:calc(100% - 96px)}.image-viewer-caption{white-space:normal;max-width:calc(100% - 40px);bottom:10px}.embed-viewer{border:0;border-radius:0;width:100vw}.embed-viewer>header{padding:max(8px, env(safe-area-inset-top)) 8px 8px 14px}.embed-viewer h2{max-width:38vw}.embed-viewer>header a{padding:0 8px}}@media (prefers-reduced-motion:reduce){.image-viewer::backdrop{-webkit-backdrop-filter:none;backdrop-filter:none}.embed-viewer::backdrop{-webkit-backdrop-filter:none;backdrop-filter:none}}.assist-retry{border:1px solid var(--reader-control-border);min-height:38px;color:var(--reader-accent-strong);background:var(--reader-control);border-radius:6px;margin-top:10px;padding:0 12px;font-size:11px}.assist-retry:hover{background:var(--reader-control-hover)}.rewrite-wait{height:30px;color:var(--reader-note-muted);align-items:center;gap:10px;margin-top:8px;font:italic 12px Iowan Old Style,serif;display:flex}.rewrite-wait>i{border-top:1px solid var(--reader-accent);width:18px;animation:.8s ease-in-out infinite alternate waiting-line}.selection-assist-back{min-height:44px;color:var(--selection-assist-muted);cursor:pointer;background:0 0;border:0;align-items:center;gap:6px;padding:0 4px 0 0;font:650 9px/1 Avenir Next,Avenir,sans-serif;display:inline-flex}.selection-assist-back:hover{color:var(--selection-assist-accent-strong)}.selection-assist-back:focus-visible{outline:2px solid var(--selection-assist-accent-strong);outline-offset:2px}.selection-assist-surface.rewrite-route .selection-assist-body-inner{padding-bottom:15px}.rewrite-error>p{color:var(--reader-danger);font-size:11px;line-height:1.5}.reader-chinese-detail{border-top:1px solid var(--reader-note-line);margin-top:14px;padding-top:13px}.reader-chinese-detail>strong{color:var(--reader-chrome-muted);margin-bottom:7px;font-size:9px;display:block}.reader-chinese-detail>p{white-space:pre-line;font:400 14px/1.58 Iowan Old Style,Baskerville,Georgia,serif}.reader-chinese-detail.is-error>p{color:var(--reader-danger);font-size:11px}.chat-thread{margin:0 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