:root{color-scheme:light;--bg:#f4f7f5;--bg-deep:#e7eeeb;--surface:rgba(255,255,255,0.82);--surface-strong:rgba(255,255,255,0.96);--surface-soft:rgba(255,255,255,0.68);--ink:#122225;--ink-soft:#516367;--ink-quiet:#728488;--line:rgba(17,44,47,0.1);--line-strong:rgba(17,44,47,0.18);--primary:#0d5b5f;--primary-strong:#08363a;--primary-soft:rgba(13,91,95,0.1);--accent:#6b7a2c;--shadow:0 20px 52px rgba(18,34,37,0.1);--shadow-soft:0 12px 28px rgba(18,34,37,0.07);--radius-sm:10px;--radius-md:16px;--radius-lg:24px;--radius-xl:32px;--container:1200px;--font-body:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;--font-display:"Iowan Old Style","Baskerville","Times New Roman","Songti SC",serif}@media (prefers-color-scheme:dark){:root{color-scheme:dark;--bg:#071417;--bg-deep:#0d2226;--surface:rgba(10,20,24,0.86);--surface-strong:rgba(10,18,22,0.96);--surface-soft:rgba(14,26,30,0.72);--ink:#eef7f4;--ink-soft:#abc0bd;--ink-quiet:#809997;--line:rgba(120,215,193,0.14);--line-strong:rgba(120,215,193,0.24);--primary:#75d8c3;--primary-strong:#c1fff2;--primary-soft:rgba(117,216,195,0.12);--accent:#9acc66;--shadow:0 26px 60px rgba(0,0,0,0.3);--shadow-soft:0 14px 32px rgba(0,0,0,0.22)}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;color:var(--ink);font-family:var(--font-body);background:radial-gradient(circle at top left,rgba(217,238,231,.88),transparent 30%),radial-gradient(circle at 84% 8%,rgba(230,229,207,.5),transparent 24%),linear-gradient(180deg,#f8fbfa 0,var(--bg) 52%,#e9f1ed 100%);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}@media (prefers-color-scheme:dark){body{background:radial-gradient(circle at top left,rgba(23,83,76,.32),transparent 30%),radial-gradient(circle at 84% 8%,rgba(84,104,46,.24),transparent 24%),linear-gradient(180deg,#071417,#0a171b 52%,#0d1f24)}}body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.16;background-image:linear-gradient(rgba(17,44,47,.04) 1px,transparent 0),linear-gradient(90deg,rgba(17,44,47,.04) 1px,transparent 0);background-size:32px 32px}a{color:inherit;text-decoration:none}button,input,select{font:inherit}main{display:block}.shell{width:min(var(--container),calc(100vw - 24px));margin:0 auto;padding:14px 0 40px}.surface{border:1px solid var(--line);border-radius:var(--radius-lg);background:linear-gradient(180deg,var(--surface-strong),var(--surface))}.surface,.topbar{box-shadow:var(--shadow-soft)}.topbar{position:-webkit-sticky;position:sticky;top:12px;z-index:30;display:grid;grid-template-columns:auto 1fr auto;grid-gap:16px;gap:16px;margin-bottom:16px;padding:12px;border:1px solid var(--line);border-radius:24px;background:var(--surface-soft);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.brand,.topbar{align-items:center}.brand{display:inline-flex;gap:12px;min-width:0}.brand-mark{width:44px;height:44px;border-radius:14px;border:1px solid var(--line);background:linear-gradient(145deg,rgba(13,91,95,.96),rgba(13,91,95,.72)),radial-gradient(circle at 30% 30%,rgba(255,255,255,.5),transparent 30%);box-shadow:0 12px 24px rgba(13,91,95,.2)}.brand-text{display:flex;flex-direction:column;gap:1px;min-width:0}.brand-text strong{font-size:.98rem;line-height:1.1}.brand-text span{color:var(--ink-quiet);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase}.nav{display:flex;justify-content:center;gap:10px;min-width:0}.nav a{display:inline-flex;align-items:center;min-height:38px;padding:0 14px;border:1px solid transparent;border-radius:999px;color:var(--ink-soft);font-size:.9rem;font-weight:650;white-space:nowrap}.nav a:hover{border-color:var(--line);background:var(--surface);color:var(--ink)}.topbar-tools{display:inline-flex;gap:8px}.chip{display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink-soft);font-size:.82rem;font-weight:650}.hero{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);grid-gap:24px;gap:24px;padding:clamp(22px,4vw,44px)}.hero-home{min-height:620px;align-items:stretch}.hero-copy{display:grid;align-content:start;grid-gap:18px;gap:18px;min-width:0}.eyebrow{color:var(--primary);font-size:.75rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase}.download-title,.hero h1,.section-title{margin:0;font-family:var(--font-display);font-weight:650;letter-spacing:0;line-height:1.04}.hero h1{max-width:11ch;font-size:clamp(2.4rem,5vw,4.8rem)}.download-copy p,.feature-copy p,.footer-note,.hero p,.hero-visual-copy p,.section-lead{margin:0;color:var(--ink-soft);line-height:1.7}.audience-grid,.download-meta,.fact-row,.faq-grid,.feature-tags,.footer-links,.hero-actions,.metrics-grid,.release-list,.section-actions,.timeline-grid{display:flex;flex-wrap:wrap;gap:12px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 18px;border:1px solid var(--line);border-radius:999px;font-weight:650;white-space:nowrap}.button-primary{border-color:transparent;background:var(--primary);color:#f7f3ea;box-shadow:0 14px 26px rgba(13,91,95,.18)}.button-secondary{background:var(--surface)}.button.is-disabled,.button[aria-disabled=true]{cursor:not-allowed;opacity:.55}.hero-panel{display:grid;grid-gap:14px;gap:14px}.hero-visual-banner{position:relative;display:grid;align-content:end;min-height:100%;overflow:hidden;padding:24px;border:1px solid var(--line);border-radius:30px;background:linear-gradient(145deg,rgba(13,91,95,.92),rgba(49,74,71,.74)),radial-gradient(circle at 20% 12%,rgba(255,255,255,.28),transparent 34%);box-shadow:var(--shadow);color:#f8fffc}.hero-visual-banner:before{content:"";position:absolute;inset:18px;border:1px solid rgba(255,255,255,.18);border-radius:24px;pointer-events:none}.hero-visual-copy{position:relative;z-index:1;display:grid;grid-gap:12px;gap:12px;max-width:520px}.hero-visual-copy .eyebrow,.hero-visual-copy p{color:rgba(248,255,252,.76)}.hero-visual-copy h2{margin:0;font-family:var(--font-display);font-size:clamp(2rem,4vw,3.5rem);line-height:1.04}.hero-visual-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:12px;gap:12px;margin-top:24px}.hero-visual-grid .metric-card{border-color:rgba(255,255,255,.18);background:rgba(255,255,255,.12);color:#f8fffc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.hero-visual-grid .metric-card span,.hero-visual-grid .metric-card svg{color:rgba(248,255,252,.76)}.mock-window{overflow:hidden;padding:16px;border:1px solid var(--line);border-radius:28px;background:linear-gradient(180deg,rgba(255,255,255,.94),rgba(246,249,247,.9));box-shadow:var(--shadow)}@media (prefers-color-scheme:dark){.mock-window{background:linear-gradient(180deg,rgba(14,26,30,.98),rgba(10,18,22,.94))}}.download-head,.feature-head,.window-bar{display:flex;align-items:center;justify-content:space-between;gap:12px}.window-dots{display:inline-flex;gap:7px}.window-dots span{width:9px;height:9px;border-radius:999px;background:rgba(13,91,95,.24)}.window-label{display:inline-flex;align-items:center;min-height:28px;padding:0 10px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-size:.75rem;font-weight:700}.stack{display:grid;grid-gap:12px;gap:12px;margin-top:14px}.download-card,.entry-card,.fact-card,.feature-card,.metric-card,.preview-card,.quote-card,.stats-card{padding:18px;border:1px solid var(--line);border-radius:22px}.preview-card{background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(247,250,248,.94))}@media (prefers-color-scheme:dark){.preview-card{background:linear-gradient(180deg,rgba(16,30,35,.98),rgba(12,22,27,.95))}}.download-card h3,.entry-card h3,.feature-card h3,.metric-card strong,.preview-card h2,.section-heading h2{margin:0;font-size:1.2rem;line-height:1.2}.preview-bar{display:grid;grid-gap:10px;gap:10px;margin-top:16px}.preview-bar span{display:block;height:10px;border-radius:999px;background:linear-gradient(90deg,rgba(13,91,95,.2),rgba(13,91,95,.04))}.preview-bar span:nth-child(2){width:88%}.preview-bar span:nth-child(3){width:66%}.tag{display:inline-flex;align-items:center;min-height:32px;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink-soft);font-size:.82rem;font-weight:650}.section{display:grid;grid-gap:20px;gap:20px;margin-top:18px}.fact-row{margin-top:6px}.fact-card{flex:1 1 180px;display:grid;grid-gap:6px;gap:6px;background:var(--surface)}.fact-card span{color:var(--ink-quiet);font-size:.75rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.fact-card strong{font-size:.95rem;line-height:1.45}.section-heading{display:grid;grid-gap:10px;gap:10px;max-width:760px}.download-title,.section-heading h2{font-size:clamp(1.8rem,3vw,3rem)}.book-grid,.download-grid,.feature-grid{display:grid;grid-gap:14px;gap:14px}.feature-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.timeline-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.feature-card,.timeline-card{background:linear-gradient(180deg,var(--surface-strong),var(--surface))}.timeline-card{padding:18px;border:1px solid var(--line);border-radius:22px}.timeline-date{color:var(--primary);font-size:.8rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.timeline-card h3{margin:10px 0 8px;font-size:1.1rem;line-height:1.25}.timeline-card h3,.timeline-card p{min-width:0}.direction-grid,.roadmap-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.audience-panel{padding:18px;border-radius:22px}.audience-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.audience-grid article{display:grid;grid-gap:8px;gap:8px;padding:8px 4px}.audience-grid span{color:var(--ink-quiet);font-size:.78rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.audience-grid strong{font-size:.98rem;line-height:1.55;font-weight:600}.feature-index{color:var(--ink-quiet);font-size:.84rem;font-weight:700}.download-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.download-card{display:grid;grid-gap:14px;gap:14px;background:linear-gradient(180deg,var(--surface-strong),var(--surface))}.download-card .button{width:-moz-fit-content;width:fit-content}.product-entry-grid{display:grid;grid-template-columns:1.15fr .95fr .9fr;grid-gap:14px;gap:14px}.entry-card{display:grid;grid-gap:16px;gap:16px;align-content:start;min-height:260px;background:linear-gradient(180deg,var(--surface-strong),var(--surface));box-shadow:var(--shadow-soft)}.entry-card:first-child{min-height:320px}.entry-card p{margin:0;color:var(--ink-soft);line-height:1.7}.entry-card .button{width:-moz-fit-content;width:fit-content;align-self:end}.metrics-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.metric-card{display:grid;grid-gap:8px;gap:8px;align-content:start;background:var(--surface)}.metric-card svg{color:var(--primary)}.metric-card span{color:var(--ink-soft);font-size:.9rem;line-height:1.5}.book-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.book-card{display:grid;grid-gap:14px;gap:14px;padding:18px;border:1px solid var(--line);border-radius:20px;background:linear-gradient(180deg,var(--surface-strong),var(--surface));box-shadow:var(--shadow-soft)}.book-card h3,.empty-state h2{margin:0;line-height:1.25}.book-card p,.empty-state p,.feature-card p,.preview-card p,.quote-card p{margin:0;color:var(--ink-soft);line-height:1.65}.book-actions{display:flex;flex-wrap:wrap;gap:10px;align-self:end}.book-cover{aspect-ratio:16/10;border-radius:18px;border:1px solid var(--line);background:linear-gradient(145deg,rgba(13,91,95,.92),rgba(13,91,95,.68)),linear-gradient(180deg,rgba(255,255,255,.14),transparent)}.book-cover.editor{background:linear-gradient(145deg,rgba(107,122,44,.94),rgba(49,74,71,.76)),linear-gradient(180deg,rgba(255,255,255,.12),transparent)}.book-cover.reading{background:linear-gradient(145deg,rgba(59,104,145,.94),rgba(16,62,84,.8)),linear-gradient(180deg,rgba(255,255,255,.12),transparent)}.book-cover-inner{display:grid;align-content:end;height:100%;padding:16px;color:#fff}.book-cover-inner span{font-size:.8rem;opacity:.76;letter-spacing:.08em;text-transform:uppercase}.book-cover-inner strong{font-size:1.1rem;line-height:1.2}.release-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.release-list>div{display:grid;grid-gap:4px;gap:4px;padding:14px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}.release-list span{color:var(--ink-quiet);font-size:.76rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.release-list strong{font-size:.95rem;line-height:1.4;word-break:break-word}.release-list small{color:var(--ink-soft);font-size:.8rem;line-height:1.4;word-break:break-word}.quote-card{display:grid;grid-template-columns:auto 1fr;grid-gap:12px;gap:12px;align-items:flex-start;background:var(--primary-soft)}.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.catalog-tools{display:grid;grid-template-columns:minmax(260px,1.3fr) repeat(3,minmax(150px,.8fr)) auto auto;grid-gap:10px;gap:10px;align-items:end;padding:14px}.search-field,.select-field{display:grid;grid-gap:6px;gap:6px;min-width:0}.search-field{position:relative}.search-field svg{position:absolute;left:13px;top:50%;color:var(--ink-quiet);transform:translateY(-50%)}.search-field input,.select-field select{width:100%;min-height:46px;border:1px solid var(--line);border-radius:14px;background:var(--surface-strong);color:var(--ink);outline:none}.search-field input{padding:0 14px 0 40px}.select-field span{color:var(--ink-quiet);font-size:.76rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.select-field select{padding:0 12px}.search-field input:focus,.select-field select:focus{border-color:var(--line-strong);box-shadow:0 0 0 4px var(--primary-soft)}.catalog-summary,.pager{display:flex;align-items:center;justify-content:space-between;gap:12px}.catalog-summary span{color:var(--ink-soft)}.pager{justify-content:flex-end}.empty-state{display:grid;grid-gap:10px;gap:10px;padding:22px}.footer{display:grid;grid-gap:12px;gap:12px;margin-top:18px;padding:20px}.footer-line{display:flex;justify-content:space-between;gap:12px;align-items:center}.footer-note{font-size:.92rem}@media (max-width:1080px){.hero{grid-template-columns:1fr}.book-grid,.direction-grid,.feature-grid,.roadmap-grid,.timeline-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.audience-grid,.faq-grid,.hero-visual-grid,.metrics-grid,.product-entry-grid,.release-list{grid-template-columns:1fr}}@media (max-width:840px){.topbar{grid-template-columns:1fr;gap:12px}.nav{justify-content:flex-start;overflow-x:auto;padding-bottom:2px;scrollbar-width:none}.nav::-webkit-scrollbar{display:none}.topbar-tools{justify-content:flex-start;flex-wrap:wrap}.book-grid,.catalog-tools,.direction-grid,.download-grid,.feature-grid,.roadmap-grid,.timeline-grid{grid-template-columns:1fr}}@media (max-width:560px){.shell{width:min(var(--container),calc(100vw - 16px))}.hero{padding:18px}.hero h1{max-width:100%;font-size:clamp(2rem,11vw,3rem)}.button{width:100%}.footer-line{flex-direction:column;align-items:flex-start}}html[data-reader-theme=dark]{color-scheme:dark}html[data-reader-theme=dark] body{background:#071012}.reader-page+body:before,html[data-reader-theme=dark] body:before{display:none}.reader-page{min-height:100vh;color:#18262a;background:#edf3ef}html[data-reader-theme=dark] .reader-page{color:#eef7f4;background:#071012}.reader-appbar{position:-webkit-sticky;position:sticky;top:0;z-index:50;display:grid;grid-template-columns:1fr minmax(220px,520px) 1fr;grid-gap:12px;gap:12px;align-items:center;min-height:64px;padding:10px 16px;border-bottom:1px solid rgba(18,38,42,.1);background:rgba(255,255,255,.88);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}html[data-reader-theme=dark] .reader-appbar{border-bottom-color:rgba(255,255,255,.1);background:rgba(7,16,18,.9)}.reader-actions-left,.reader-actions-right{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.reader-actions-right{justify-content:flex-end}.reader-icon-button,.reader-mini-button,.reader-nav-button,.reader-segment button,.reader-status-action,.reader-stepper button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;border:1px solid rgba(18,38,42,.12);border-radius:999px;background:rgba(255,255,255,.72);color:inherit;cursor:pointer;font-weight:700}.reader-icon-button{padding:0 12px;font-size:.88rem}html[data-reader-theme=dark] .reader-icon-button,html[data-reader-theme=dark] .reader-mini-button,html[data-reader-theme=dark] .reader-nav-button,html[data-reader-theme=dark] .reader-segment button,html[data-reader-theme=dark] .reader-status-action,html[data-reader-theme=dark] .reader-stepper button{border-color:rgba(255,255,255,.12);background:rgba(255,255,255,.08)}.reader-title{display:grid;grid-gap:2px;gap:2px;min-width:0;text-align:center}.reader-title span,.reader-title strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.reader-title strong{font-size:1rem}.reader-title span{color:#637579;font-size:.82rem}html[data-reader-theme=dark] .reader-title span{color:#9cb4b0}.reader-workspace{position:relative;min-height:100vh;padding:14px 16px 18px;background:linear-gradient(180deg,rgba(255,255,255,.38),rgba(255,255,255,0)),#edf3ef}html[data-reader-theme=dark] .reader-workspace{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,0)),#071012}.reader-statusbar{display:grid;grid-template-columns:auto 1fr auto;grid-gap:12px;gap:12px;align-items:center;width:min(980px,100%);margin:14px auto 12px}.reader-status-copy{display:grid;grid-gap:2px;gap:2px;min-width:0;text-align:center}.reader-status-copy span,.reader-status-copy strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.reader-status-copy span{color:#637579;font-size:.84rem}html[data-reader-theme=dark] .reader-status-copy span{color:#9cb4b0}.reader-content-shell{width:min(980px,100%);height:calc(100vh - 212px);min-height:460px;margin:0 auto;overflow:hidden;border:1px solid rgba(18,38,42,.1);border-radius:20px;background:#fffef9;box-shadow:0 18px 46px rgba(18,38,42,.08)}html[data-reader-theme=dark] .reader-content-shell{border-color:rgba(255,255,255,.1);background:#101b1f;box-shadow:0 18px 46px rgba(0,0,0,.26)}.reader-flow{height:100%;overflow-x:auto;overflow-y:hidden;padding:64px 56px 44px;column-gap:112px;column-width:calc(min(980px, 100vw) - 112px);line-height:1.82;scroll-behavior:smooth;scrollbar-width:none;touch-action:pan-y;-webkit-user-select:text;-moz-user-select:text;user-select:text}.reader-flow::-webkit-scrollbar{display:none}.reader-flow h1,.reader-flow h2,.reader-flow h3{page-break-after:avoid;break-after:avoid;font-family:var(--font-display);line-height:1.25}.reader-flow blockquote,.reader-flow li,.reader-flow p{margin:0 0 1em}.reader-flow img,.reader-flow video{max-width:100%;height:auto}.reader-flow a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}.reader-flow .mo-active{border-radius:6px;background:rgba(255,214,102,.45);box-shadow:0 0 0 3px rgba(255,214,102,.2)}html[data-reader-theme=dark] .reader-flow .mo-active{background:rgba(154,204,102,.28);box-shadow:0 0 0 3px rgba(154,204,102,.16)}.reader-bottom-nav{display:flex;justify-content:center;gap:12px;margin-top:12px}.reader-nav-button,.reader-status-action{padding:0 16px}.reader-drawer,.reader-settings{position:fixed;top:78px;bottom:18px;z-index:70;display:grid;grid-template-rows:auto 1fr;width:min(380px,calc(100vw - 28px));padding:16px;border:1px solid rgba(18,38,42,.12);border-radius:20px;background:rgba(255,255,255,.96);box-shadow:0 22px 54px rgba(18,38,42,.18);transition:transform .18s ease,opacity .18s ease}.reader-drawer{left:14px;transform:translateX(calc(-100% - 24px))}.reader-settings{right:14px;bottom:auto;grid-template-rows:auto auto;gap:16px;transform:translateX(calc(100% + 24px))}.reader-drawer.is-open,.reader-settings.is-open{transform:translateX(0)}html[data-reader-theme=dark] .reader-drawer,html[data-reader-theme=dark] .reader-settings{border-color:rgba(255,255,255,.12);background:rgba(12,24,28,.96);box-shadow:0 22px 54px rgba(0,0,0,.34)}.reader-panel-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;padding-bottom:12px;border-bottom:1px solid rgba(18,38,42,.1)}.reader-panel-head div{display:grid;grid-gap:4px;gap:4px}.reader-panel-head span,.reader-setting-group>span{color:#637579;font-size:.84rem}html[data-reader-theme=dark] .reader-panel-head span,html[data-reader-theme=dark] .reader-setting-group>span{color:#9cb4b0}.reader-toc{min-height:0;overflow:auto;padding-top:12px}.reader-toc ul{display:grid;grid-gap:6px;gap:6px;margin:0;padding:0;list-style:none}.reader-toc ul ul{margin:6px 0 6px 14px}.reader-toc-row{display:grid;grid-template-columns:minmax(0,1fr) 34px;grid-gap:4px;gap:4px;align-items:center}.reader-toc button{width:100%;min-height:38px;padding:8px 10px;border:1px solid transparent;border-radius:10px;background:transparent;color:inherit;cursor:pointer;text-align:left}.reader-toc .reader-toc-toggle{width:34px;min-height:34px;padding:0;text-align:center}.reader-toc-toggle svg{transition:transform .16s ease}.reader-toc-toggle.is-open svg{transform:rotate(180deg)}.reader-toc button.is-active,.reader-toc button:hover{border-color:rgba(13,91,95,.18);background:rgba(13,91,95,.08)}.reader-toc-empty{color:#637579}.reader-screen{position:fixed;inset:0;z-index:60;border:0;background:rgba(7,16,18,.24)}.reader-setting-group{display:grid;grid-gap:10px;gap:10px}.reader-segment,.reader-stepper{display:flex;gap:8px}.reader-segment button{flex:1 1}.reader-segment button.is-active{border-color:transparent;background:var(--primary);color:#f7f3ea}.reader-stepper{align-items:center}.reader-stepper button{width:44px;padding:0}.reader-stepper strong{min-width:82px;text-align:center}.reader-audio{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:center;width:min(980px,100%);margin:-2px auto 12px;padding:8px 12px;border:1px solid rgba(18,38,42,.1);border-radius:999px;background:rgba(255,255,255,.72)}.reader-audio select{min-height:34px;border:1px solid rgba(18,38,42,.12);border-radius:999px;background:transparent;color:inherit}.reader-selection-menu{position:fixed;z-index:90;display:inline-flex;overflow:hidden;border:1px solid rgba(18,38,42,.16);border-radius:12px;background:#122225;color:#f8fffc;box-shadow:0 16px 36px rgba(18,38,42,.28);transform:translate(-50%,calc(-100% - 12px))}.reader-selection-menu button{min-width:54px;min-height:38px;border:0;border-right:1px solid rgba(255,255,255,.14);background:transparent;color:inherit;cursor:pointer;font-weight:750}.reader-selection-menu button:last-child{border-right:0}.reader-selection-menu button:hover{background:rgba(255,255,255,.1)}.reader-empty{display:grid;grid-gap:14px;gap:14px;width:min(680px,calc(100vw - 28px));margin:80px auto;padding:28px}.reader-empty h1,.reader-empty p{margin:0}@media (max-width:820px){.reader-appbar{grid-template-columns:1fr}.reader-actions-left,.reader-actions-right{justify-content:center}.reader-title{order:-1}.reader-content-shell{height:calc(100vh - 286px);min-height:360px;border-radius:16px}.reader-flow{padding:42px 28px 34px;column-width:calc(100vw - 88px);column-gap:56px}}@media (max-width:560px){.reader-workspace{padding:10px 8px 14px}.reader-icon-button span{display:none}.reader-statusbar{grid-template-columns:1fr}.reader-content-shell{height:calc(100vh - 316px)}.reader-flow{padding:34px 22px 28px;column-width:calc(100vw - 60px);column-gap:44px}.reader-bottom-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}}