:root{--read-size: 19px;--paper: #f3ead7;--ink: #3c3324;--ink-soft: #6b5d45;--line: rgba(60, 51, 36, .16);--accent: #b03a2e;--accent-soft: rgba(176, 58, 46, .12);--ui-bg: rgba(243, 234, 215, .9);--shadow: 0 8px 30px rgba(60, 51, 36, .12);--topbar-h: 52px}body.theme-light{--paper: #ffffff;--ink: #242424;--ink-soft: #666666;--line: rgba(36, 36, 36, .14);--accent: #b03a2e;--ui-bg: rgba(255, 255, 255, .92)}body.theme-dark{--paper: #1b1916;--ink: #cfc5b0;--ink-soft: #948a76;--line: rgba(207, 197, 176, .16);--accent: #e07b5f;--accent-soft: rgba(224, 123, 95, .14);--ui-bg: rgba(27, 25, 22, .92)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Serif TC",Songti TC,STSong,PMingLiU,Times New Roman,serif;transition:background .35s ease,color .35s ease}.progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--accent),#e0a458);z-index:50;transition:width .1s linear}.topbar{position:sticky;top:0;z-index:40;height:var(--topbar-h);display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:var(--ui-bg);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}.brand-mark{display:grid;place-items:center;width:30px;height:30px;border-radius:8px 8px 8px 2px;background:var(--accent);color:var(--paper);font-size:16px;box-shadow:0 3px 10px var(--accent-soft)}.brand-text{font-weight:700;letter-spacing:.18em;font-size:15px}.brand-text em{font-style:normal;font-weight:400;color:var(--ink-soft);font-size:12px;letter-spacing:.22em}.topnav a{color:var(--ink-soft);text-decoration:none;font-size:13px;letter-spacing:.06em}.topnav a:hover{color:var(--accent)}.shell{display:grid;grid-template-columns:minmax(0,1fr);max-width:1180px;margin:0 auto;padding:0 16px 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var(--line);border-radius:10px;background:var(--paper);color:var(--ink);font:inherit;font-size:13px}.share-actions{display:flex;gap:8px;margin-top:12px;justify-content:flex-end}.toolbar{position:fixed;left:50%;bottom:18px;transform:translate(-50%);display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:center;padding:10px 16px;border-radius:16px;border:1px solid var(--line);background:var(--ui-bg);backdrop-filter:blur(10px);box-shadow:var(--shadow);z-index:40;max-width:calc(100vw - 24px)}body.toolbar-hidden .toolbar{transform:translateY(150%);opacity:0;pointer-events:none}.toolbar-float{position:fixed;right:14px;bottom:88px;z-index:45;width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:var(--ui-bg);color:var(--ink-soft);backdrop-filter:blur(8px);box-shadow:var(--shadow);cursor:pointer;font-family:inherit;font-size:16px;line-height:1;transition:bottom .25s ease,transform .15s ease,color .15s ease}body.toolbar-hidden .toolbar-float{bottom:14px}.toolbar-float:hover{color:var(--accent);transform:scale(1.08)}.float-pages{position:fixed;right:14px;top:50%;transform:translateY(-50%);z-index:45;display:none;flex-direction:column;gap:10px}body.toolbar-hidden .float-pages{display:flex}.float-page{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:var(--ui-bg);color:var(--ink-soft);backdrop-filter:blur(8px);box-shadow:var(--shadow);cursor:pointer;font-family:inherit;font-size:14px;line-height:1;transition:transform .15s ease,color .15s ease}.float-page:hover{color:var(--accent);transform:scale(1.08)}.float-page:disabled{opacity:.4;cursor:not-allowed}.tool-group{display:flex;align-items:center;gap:8px}.tool-label{font-size:12px;color:var(--ink-soft);letter-spacing:.12em}.seg{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}.seg button,.chip{appearance:none;border:none;background:none;color:var(--ink);font-family:inherit;font-size:13px;padding:7px 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