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4px}.chapter-index+.contents-label{margin-top:40px}.title-index{border-top:1px solid var(--line);margin:0;padding:0;list-style:none}.title-index li{border-bottom:1px solid var(--line)}.title-index a{font:500 15px/1.45 var(--serif);text-underline-offset:4px;text-decoration-color:var(--line);padding:11px 0;display:block}.title-index a:hover{text-decoration-color:currentColor}.title-index .ext{color:var(--muted);font-size:12px}.book-title{font:400 clamp(30px, 4vw, 40px)/1.2 var(--serif);margin:0}.book-head .book-subtitle{margin:8px 0 16px;font-size:15px}.book-description{color:var(--muted);margin:0 0 12px;font-size:14px;line-height:1.7}@media (prefers-reduced-motion:no-preference) and (width>=621px){@view-transition{navigation:auto}::view-transition-group(root){animation-duration:.36s}:root:active-view-transition .enter{animation:none}::view-transition-new(book-side):only-child,::view-transition-new(book-index):only-child{animation:.42s cubic-bezier(.2,.7,.2,1) .3s both 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.chapter-title{text-underline-offset:4px;text-decoration:underline}.note-reading{width:100%}.reading-back{min-height:44px;color:var(--muted);align-items:center;font-size:14px;text-decoration:none;display:inline-flex}.note-prose{letter-spacing:.025em;max-width:34em;font-family:Songti SC,Noto Serif CJK SC,Noto Serif SC,SimSun,serif;font-size:17px;line-height:2}.note-prose h1{margin:24px 0 36px;font-family:inherit;font-size:34px;font-weight:500;line-height:1.4}.note-prose p{margin:0 0 1.5em}.reading-footer{border-top:1px solid var(--line);justify-content:space-between;gap:24px;max-width:34em;margin-top:40px;padding-top:24px;font-size:14px;display:flex}.flip{z-index:100;transform-origin:0 0;pointer-events:none;--fg:#2a2722;--muted:#77736a;--line:#e4dfd5;color:var(--fg);outline:none;position:fixed}.flip.is-open{pointer-events:auto}.flip-scrim{z-index:99;background:var(--bg);position:fixed;inset:0}.flip-page,.flip-cover,.flip-back{position:absolute;inset:0}.flip-page{overscroll-behavior:contain;background:#fbfaf6 linear-gradient(90deg,#00000014,#0000 5%);border:1px solid #d8d6d0;padding:9% 9% 7%;overflow:auto;box-shadow:6px 14px 28px #28241d30}.flip-cover{transform-origin:0;transform-style:preserve-3d}.flip-cover .book-jacket,.flip-back{aspect-ratio:auto;backface-visibility:hidden;position:absolute;inset:0}.flip-back{background:#f3efe6 linear-gradient(270deg,#0000001a,#0000 6%);border:1px solid #d8d6d0;flex-direction:column;justify-content:flex-end;padding:12% 11%;display:flex;transform:rotateY(180deg);box-shadow:-6px 14px 28px #28241d30}.inside-label{font:11px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 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