:root{--canvas: #fcf7ed;--surface: #fffdf9;--ink: #29211f;--muted: #6b615c;--muted-strong: #4f4944;--line: #e7dfd6;--surface-tint: #fffaf5;--surface-sunken: #f8f3ed;--surface-muted: #f4efe9;--surface-deep: #efe8df;--neutral-surface: #f1eee9;--ink-faint: #aaa19a;--scrim: #141312;--coral: #f26345;--coral-dark: #cc4a30;--coral-soft: #fff0eb;--coral-surface-strong: #ffe5dd;--mint: #e8f6e9;--mint-ink: #19743b;--amber-ink: #a9530d;--amber-surface: #fff3e7;--amber-surface-light: #fff8ec;--amber-surface-strong: #fff3d6;--amber-line: #efd6b8;--amber-line-soft: #edd9c4;--amber-line-dashed: #decab9;--danger: #b42318;--danger-surface: #fde9e7;--radius-control: 8px;--radius-card: 12px;--radius-panel: 14px;--shadow-card: 0 14px 40px rgba(65, 45, 31, .05);--shadow-floating: 0 24px 70px rgba(65, 45, 31, .08);--shadow-drawer: -24px 0 60px rgba(22, 18, 15, .16);--shadow-modal: 0 28px 80px rgba(22, 18, 15, .22);--shadow-hairline: inset 0 0 0 1px rgba(55, 43, 36, .08)}:root{--font-serif: Georgia, "Songti SC", "STSong", "Noto Serif SC", "Times New Roman", serif;--font-ui: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Segoe UI", Roboto, sans-serif}*{box-sizing:border-box}html{text-size-adjust:100%}body{margin:0;background:var(--canvas);color:var(--ink);font-family:var(--font-ui);font-size:17px;line-height:1.65;text-rendering:optimizeLegibility;overflow-x:hidden;min-height:100vh}img{max-width:100%;height:auto}a{color:inherit}[hidden]{display:none!important}a:focus-visible,button:focus-visible,summary:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--coral);outline-offset:3px;border-radius:var(--radius-control)}h1,h2,h3{font-family:var(--font-serif);font-weight:400;letter-spacing:-.03em;line-height:1.12;margin:0;text-wrap:balance}p{margin:0 0 18px}.lead{font-size:clamp(18px,1.6vw,20px);line-height:1.68;color:var(--muted-strong)}.note{font-size:14px;line-height:1.6;color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 26px;border:0;border-radius:var(--radius-control);font-family:var(--font-ui);font-size:19px;font-weight:700;letter-spacing:-.01em;text-decoration:none;cursor:pointer;transition:transform .09s ease,box-shadow .09s ease,background .15s ease}.btn-primary{background:var(--coral);color:#fff;box-shadow:0 4px 0 0 var(--coral-dark)}.btn-primary:hover{background:var(--coral-dark)}.btn-primary:active{transform:translateY(4px);box-shadow:0 0 0 0 var(--coral-dark)}.btn-quiet{background:var(--surface);color:var(--ink);border:1px solid var(--line);box-shadow:0 4px 0 0 var(--line)}.btn-quiet:hover{background:var(--surface-tint)}.btn-quiet:active{transform:translateY(4px);box-shadow:0 0 0 0 var(--line)}.btn:disabled{opacity:.6;cursor:default}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}html[lang^=zh] body{line-height:1.85}html[lang^=zh] h1,html[lang^=zh] h2,html[lang^=zh] h3{letter-spacing:0;line-height:1.35}:root{--reader-size: 18.5px;--reader-leading: 1.62;--reader-measure: 66ch}#app{display:flex;flex-direction:column;min-height:100vh}.rd-top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:18px;min-height:64px;padding:0 clamp(16px,4vw,32px);background:color-mix(in srgb,var(--canvas) 90%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.rd-brand{display:inline-flex;align-items:center;text-decoration:none}.rd-brand img{height:30px;width:auto;display:block}.rd-nav{margin-left:auto;display:flex;gap:22px;font-size:15px;font-weight:600}.rd-nav a{color:var(--muted-strong);text-decoration:none}.rd-nav a:hover{color:var(--ink)}.rd-top-reader{gap:12px}.rd-back{display:inline-flex;align-items:center;gap:2px;margin-left:-8px;padding:6px 10px 6px 4px;border-radius:var(--radius-control);color:var(--coral-dark);text-decoration:none;font-weight:700;font-size:15px;white-space:nowrap}.rd-back:hover{background:var(--surface-tint)}.rd-back+.rd-brand{padding-left:14px;border-left:1px solid var(--line)}.rd-reader-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:var(--font-serif);font-size:17px;color:var(--muted-strong)}.rd-tools{display:flex;gap:8px}.rd-menu{position:relative}.rd-menu summary{list-style:none;cursor:pointer;font-size:14px;font-weight:600;padding:8px 12px;border:1px solid var(--line);border-radius:var(--radius-control);background:var(--surface);color:var(--ink)}.rd-menu summary::-webkit-details-marker{display:none}.rd-menu[open] summary{background:var(--surface-tint)}.rd-menu-panel{position:absolute;right:0;top:calc(100% + 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8px;border-radius:999px;background:var(--neutral-surface);color:var(--muted-strong)}.badge.is-done{background:var(--mint);color:var(--mint-ink)}.badge.is-locked{background:var(--amber-surface);color:var(--amber-ink)}.seg{display:flex;gap:8px}.seg-item{flex:1;font:inherit;font-size:15px;font-weight:700;padding:11px 0;border-radius:var(--radius-card);border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}.seg-item.is-on{background:var(--coral);border-color:var(--coral);color:#fff}.rd-icon{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border:0;border-radius:var(--radius-control);background:transparent;color:var(--ink);cursor:pointer;padding:0;font:inherit;text-decoration:none;list-style:none}.rd-icon:hover{background:var(--surface-tint)}.rd-icon::-webkit-details-marker{display:none}.rd-aa{font-family:var(--font-serif);font-weight:600;font-size:17px}.rd-menu summary.rd-icon{border:0;padding:0;background:transparent}.rd-menu[open] summary.rd-icon{background:var(--surface-tint)}.rd-pager{flex:1;min-width:0;display:flex;align-items:center;justify-content:center;gap:8px;font-size:14px;font-weight:600;color:var(--muted-strong)}.rd-pager span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.rd-pager-arrow{width:32px;height:32px;border:0;background:transparent;color:var(--coral);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-control)}.rd-pager-arrow:disabled{opacity:.35;cursor:default}.rd-text-panel{display:flex;flex-direction:column;gap:0;min-width:320px;padding:6px 16px 12px}.rd-text-sample{font-family:var(--font-serif);font-size:var(--reader-size);line-height:var(--reader-leading);color:var(--muted-strong);margin:8px 0 12px}.rd-text-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-top:1px solid var(--line);font-size:15px;font-weight:600}.rd-text-row-block{flex-direction:column;align-items:stretch}.rd-text-row .seg{margin-top:10px}.rd-stepper{display:inline-flex;align-items:center;gap:4px;font-weight:500;color:var(--muted-strong);font-size:14px}.rd-stepper span{min-width:56px;text-align:center}.rd-stepper .rd-icon{border:1px solid var(--line);background:var(--surface)}.rd-toggle{width:50px;height:30px;border-radius:15px;border:0;background:var(--line);position:relative;cursor:pointer;padding:0}.rd-toggle span{position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:var(--shadow-hairline);transition:left .15s ease}.rd-toggle.is-on{background:var(--coral)}.rd-toggle.is-on span{left:23px}.reader-fab{position:fixed;right:24px;bottom:88px;z-index:25;width:56px;height:56px;border-radius:50%;border:0;background:var(--coral);color:#fff;box-shadow:0 4px 0 0 var(--coral-dark),var(--shadow-card);display:flex;align-items:center;justify-content:center;cursor:pointer;padding:0}.reader-fab:disabled{cursor:default;opacity:.55}.reader-fab-soon{position:absolute;top:-26px;right:0;font-size:11px;font-weight:700;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:2px 8px;white-space:nowrap}body.is-reading-pages{overflow:hidden}body.is-reading-pages #app{height:100vh}body.is-reading-pages .rd-main{flex:1;min-height:0;display:flex;flex-direction:column;padding:0;width:100%}.reader-stage{position:relative}.reader-stage.is-paged{flex:1;min-height:0;display:flex;align-items:stretch;justify-content:center;padding:24px clamp(56px,10vw,140px)}.reader-stage.is-paged .reader{flex:1;min-height:0;overflow:auto;width:100%}.reader-edge{position:absolute;top:0;bottom:0;width:clamp(48px,9vw,130px);border:0;background:transparent;color:var(--muted);opacity:.45;cursor:pointer;display:flex;align-items:center;padding:0 18px}.reader-edge:hover{opacity:1;background:color-mix(in srgb,var(--surface-tint) 60%,transparent)}.reader-edge:disabled{opacity:.12;cursor:default}.reader-edge-left{left:0;justify-content:flex-start}.reader-edge-right{right:0;justify-content:flex-end}.reader-foot{display:flex;align-items:center;gap:18px;padding:12px clamp(16px,4vw,32px) 16px;border-top:1px solid var(--line);background:color-mix(in srgb,var(--canvas) 92%,transparent)}.reader-segments{flex:1;display:flex;gap:4px}.reader-segment{flex:1;height:4px;border-radius:2px;background:var(--surface-deep)}.reader-segment.is-done{background:var(--coral)}.reader-segment.is-current{background:color-mix(in srgb,var(--coral) 45%,var(--canvas))}.reader-foot .note{white-space:nowrap;margin:0}@keyframes turn-forward{0%{opacity:0;transform:translate(28px)}to{opacity:1;transform:none}}@keyframes turn-back{0%{opacity:0;transform:translate(-28px)}to{opacity:1;transform:none}}.reader.turn-forward{animation:turn-forward .22s cubic-bezier(.22,1,.36,1)}.reader.turn-back{animation:turn-back .22s cubic-bezier(.22,1,.36,1)}.reader-stage.is-paged .part{padding-top:0}.reader-stage.is-paged .part+.part{margin-top:0;border-top:0}@media(max-width:640px){.reader-stage.is-paged{padding:16px 20px}.reader-edge{width:44px;padding:0 6px}.reader-fab{right:16px;bottom:76px;width:52px;height:52px}}.trial-tag{font-size:13px;font-weight:700;color:var(--amber-ink);background:var(--amber-surface);padding:4px 10px;border-radius:999px;white-space:nowrap}.trial-card{margin-top:32px;padding:18px 22px;background:var(--amber-surface-light);border:1px solid var(--amber-line);border-radius:var(--radius-panel);max-width:420px}.trial-card b{color:var(--amber-ink);font-size:15px}.trial-card p{margin:6px 0 0;font-size:14px;color:var(--muted-strong);line-height:1.55}.blk.is-speaking{background:color-mix(in srgb,var(--mint) 90%,transparent);box-shadow:0 0 0 6px color-mix(in srgb,var(--mint) 90%,transparent)}.audio-dock{position:fixed;left:0;right:0;bottom:0;z-index:26;padding:10px clamp(16px,4vw,32px) 14px;background:color-mix(in srgb,var(--canvas) 96%,transparent);border-top:1px solid var(--line)}body.is-reading-pages .audio-dock{position:static}.audio-bar{width:min(100%,720px);margin:0 auto;display:flex;align-items:center;gap:12px;padding:8px 12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-panel);box-shadow:var(--shadow-card);cursor:pointer}.audio-play{width:44px;height:44px;border-radius:50%;border:0;background:var(--coral);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;flex:none}.audio-play-large{width:76px;height:76px;box-shadow:0 4px 0 0 var(--coral-dark)}.audio-bar-text{flex:1;min-width:0}.audio-bar-text b{display:block;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.audio-progress{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);margin-top:4px}.audio-track{flex:1;height:4px;border-radius:2px;background:var(--surface-deep);overflow:hidden}.audio-fill{height:100%;background:var(--coral);width:0}.audio-rate{font:inherit;font-size:13px;font-weight:700;padding:6px 10px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink);cursor:pointer;white-space:nowrap}.audio-return{font:inherit;font-size:13px;font-weight:700;padding:6px 10px;border:0;border-radius:999px;background:var(--ink);color:var(--canvas);cursor:pointer;white-space:nowrap}.audio-preview{text-align:center;margin:8px 0 0}body.is-listening .reader-fab{bottom:120px}body.is-listening .rd-main{padding-bottom:120px}@media(max-width:640px){.audio-bar .rd-icon{display:none}}.audio-player{position:fixed;inset:0;z-index:40;background:color-mix(in srgb,var(--scrim) 50%,transparent);display:flex;align-items:center;justify-content:center;padding:16px}.audio-player-card{width:min(100%,520px);max-height:96vh;overflow:auto;background:var(--canvas);border-radius:18px;box-shadow:var(--shadow-modal);padding:16px 32px 28px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px}.audio-player-close{align-self:flex-end}.audio-player-cover{width:min(60%,260px)}.audio-player-part{font-size:20px;font-weight:800;margin-top:16px}.audio-progress-large{width:100%;margin-top:18px}.audio-progress-large .audio-track{height:6px;cursor:pointer}.audio-transport{display:flex;align-items:center;justify-content:center;gap:22px;margin:22px 0 18px}.audio-player-foot{width:100%;display:flex;align-items:center;justify-content:space-between}.ask-panel{position:fixed;inset:0;z-index:35;display:flex;align-items:flex-end;justify-content:center;pointer-events:none}.ask-sheet{pointer-events:auto;width:min(100%,760px);max-height:82vh;display:flex;flex-direction:column;gap:14px;background:var(--surface);border:1px solid var(--line);border-bottom:0;border-radius:18px 18px 0 0;box-shadow:var(--shadow-modal);padding:8px 24px 20px;animation:ask-rise .22s cubic-bezier(.22,1,.36,1)}@keyframes ask-rise{0%{transform:translateY(24px);opacity:0}to{transform:none;opacity:1}}.ask-head{display:flex;align-items:center;justify-content:space-between}.ask-quote{margin:0;padding-left:16px;border-left:2px solid var(--line);font-family:var(--font-serif);font-size:16px;line-height:1.5;color:var(--muted-strong)}.ask-thread{flex:1;min-height:0;overflow:auto;display:flex;flex-direction:column;gap:14px}.ask-entry{display:flex;flex-direction:column;gap:10px}.ask-bubble{align-self:flex-end;max-width:78%;background:var(--ink);color:var(--canvas);padding:10px 14px;border-radius:16px 16px 4px;font-size:16px}.ask-status{font-size:13px;color:var(--muted)}.ask-card{padding:18px 20px;background:var(--canvas);border:1px solid var(--line);border-radius:var(--radius-panel)}.ask-card p{font-family:var(--font-serif);font-size:18px;line-height:1.55;margin:0 0 12px}.ask-card-empty p,.ask-card-limit p{font-family:var(--font-ui);font-size:15px;color:var(--muted-strong);margin:0}.ask-card-limit{background:var(--amber-surface-light);border-color:var(--amber-line)}.ask-card-limit p{color:var(--amber-ink)}.ask-card-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px}.ask-card-meta a{color:var(--coral-dark);font-weight:700;text-decoration:none}.ask-how summary{cursor:pointer;color:var(--muted);list-style:none}.ask-how summary::-webkit-details-marker{display:none}.ask-how p{font-family:var(--font-ui);font-size:13px;margin:6px 0 0}.ask-actions{display:flex;gap:8px;margin-top:10px;color:var(--muted)}.ask-disclaimer{margin:10px 0 0;font-size:12px;color:var(--ink-faint)}.ask-chips{display:flex;flex-wrap:wrap;gap:8px}.ask-form{display:flex;align-items:center;gap:8px;padding:4px 4px 4px 16px;border:1px solid var(--line);border-radius:999px;background:var(--surface)}.ask-form input{flex:1;border:0;background:transparent;font:inherit;font-size:16px;color:var(--ink);padding:8px 0;min-width:0}.ask-form input:focus-visible{outline:none}.ask-send{width:40px;height:40px;border-radius:50%;border:0;background:var(--coral);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;flex:none}.ask-send:disabled{opacity:.5;cursor:default}