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*{box-sizing:border-box}html{scroll-padding-top:95px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Serif SC","Songti SC","SimSun",serif;line-height:1.95}a{color:var(--navy);text-decoration-thickness:1px;text-underline-offset:4px}a:hover{color:var(--gold)}button,input,select{font:inherit}button{cursor:pointer;border:1px solid var(--line);border-radius:5px;background:var(--panel);color:var(--ink);padding:5px 12px}button:disabled{opacity:.4;cursor:default}:focus-visible{outline:3px solid #bd913c;outline-offset:3px}.skip{position:absolute;top:-100px;left:12px;background:white;padding:12px;z-index:100}.skip:focus{top:10px}
.top{position:sticky;top:0;z-index:20;background:var(--panel);border-bottom:1px solid var(--line)}.top-inner{max-width:1200px;margin:auto;display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:12px 22px;font-family:system-ui,sans-serif;font-size:14px}.top .brand{font-weight:700;margin-right:auto}.mast{max-width:1060px;margin:auto;padding:50px 28px 32px}.eyebrow{color:var(--gold);font:12px/1.5 system-ui,sans-serif;letter-spacing:.2em}.mast h1{font-size:clamp(28px,5vw,42px);color:var(--navy);margin:12px 0}.mast p{margin:9px 0;color:var(--muted)}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.actions a{display:inline-block;padding:8px 16px;border:1px solid var(--line);text-decoration:none;background:var(--panel)}.actions a.primary{background:var(--navy);color:#fff}
.note{padding:16px 20px;border-left:3px solid var(--gold);background:var(--panel);font-size:15px;line-height:1.8}.layout{display:grid;grid-template-columns:270px minmax(0,790px);gap:30px;max-width:1180px;padding:0 24px 60px;margin:auto}.sidebar{position:sticky;top:82px;align-self:start;max-height:calc(100vh - 110px);overflow:auto;border:1px solid var(--line);background:var(--panel);padding:16px;font-family:system-ui,sans-serif;font-size:14px}.sidebar input{width:100%;min-width:0;border:1px solid var(--line);padding:8px;background:var(--paper);color:var(--ink)}.toc a{display:block;padding:7px 3px;border-bottom:1px solid var(--line);text-decoration:none;line-height:1.65}.toc a.part{font-weight:700;color:var(--gold);padding-top:18px}.toc a[aria-current="true"]{background:#eadfc7;color:#172c3b}.content{min-width:0}.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:0 0 20px;font-family:system-ui,sans-serif;font-size:14px}.reader-unit{background:var(--panel);padding:34px 40px;margin-bottom:30px;border:1px solid var(--line);overflow-wrap:anywhere;font-size:var(--text-size)}.reader-unit h1,.reader-unit h2{font-size:1.45em;line-height:1.6;color:var(--navy);margin:1.4em 0 .8em}.reader-unit h3{font-size:1.15em;line-height:1.7;color:var(--navy);margin:1.4em 0 .65em}.reader-unit h2:first-child{margin-top:0}.reader-unit p{margin:.9em 0;text-align:justify;white-space:pre-wrap}.reader-unit .formula{font-family:"Cambria Math","STIX Two Math","Times New Roman",serif;background:var(--paper);padding:12px 15px;border-left:2px solid var(--gold);text-align:left}.reader-unit .source-row{font-family:"Noto Sans SC",system-ui,sans-serif;font-size:.9em;background:var(--paper);padding:8px 12px;text-align:left}.unit-link{font:12px system-ui,sans-serif;color:var(--muted)}.pagination{display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin:22px 0}.pagination a{padding:10px;border:1px solid var(--line);background:var(--panel)}.index-list{max-width:900px;margin:0 auto 60px;padding:0 26px}.index-list a{display:block;padding:13px 18px;border-bottom:1px solid var(--line);background:var(--panel);text-decoration:none}.index-list .part{margin-top:22px;background:var(--navy);color:white}.foot{text-align:center;border-top:1px solid var(--line);padding:30px 22px;color:var(--muted);font-size:13px}.js-only{display:none}html.enhanced .js-only{display:inline-flex}[hidden]{display:none!important}html.night{--paper:#15202a;--panel:#1c2b37;--ink:#e3e2dc;--navy:#c3d9ea;--gold:#d4b36b;--muted:#afbdc9;--line:#40515f}.empty{font-size:14px;color:var(--muted)}
@media(max-width:850px){.layout{grid-template-columns:1fr;padding:0 14px 40px;gap:18px}.sidebar{position:static;max-height:260px}.mast{padding:32px 20px 24px}.reader-unit{padding:22px 20px;font-size:var(--text-size)}.top-inner{gap:10px;padding:10px 15px}.top .brand{flex-basis:100%}.reader-unit h2{font-size:1.25em}.toolbar{margin-top:4px}}
@media print{.top,.sidebar,.toolbar,.pagination,.foot,.unit-link,.actions{display:none!important}.layout{display:block;max-width:none;padding:0}.reader-unit{display:block!important;border:0;padding:0;break-before:page}.reader-unit p{orphans:3;widows:3}body{background:white;color:black}.mast{padding:0}.note{border:1px solid #ccc}}

/* 第53号：220/302专著系列版式 · v2 */
body{background:#0B0E12}.top{background:#11161B;border-color:#232A31}.top a{color:#D9A441}.mast{color:#E6E4DE}.mast h1{color:#E6E4DE}.mast p{color:#A5ADB5}.mast .eyebrow{color:#D9A441}.mast .note{color:#38414a}.mast .actions a{border-radius:8px}.sidebar{background:#11161B;border-color:#232A31;color:#E6E4DE;border-radius:10px}.sidebar input{background:#0B0E12;color:#E6E4DE;border-color:#36414B}.sidebar .toc a{color:#C8CDD2;border-color:#232A31}.sidebar .toc a.part{color:#D9A441}.sidebar .toc a[aria-current="true"]{background:#27271F;color:#F0CD83}.reader-unit{border-radius:6px;box-shadow:0 16px 42px #0002}.toolbar{color:#C0C6CB}.foot{color:#8C949C;border-color:#232A31}.foot a{color:#D9A441}.pagination{color:#C0C6CB}.pagination a{border-radius:6px}.index-list{color:#E6E4DE}.index-list h2{color:#D9A441}.index-list>a{color:#102B43}.index-list .part{background:#1C252D;color:#D9A441}.index-list a{border-radius:5px}.night .mast .note{color:var(--ink)}.night .index-list>a{color:var(--navy)}
@media print{body{background:white}.mast,.mast h1,.mast p,.index-list{color:black}.reader-unit{box-shadow:none}.index-list>a{color:black}}