html{--yta1n0s:rgb(248 241 244);color-scheme:light;--ytaiucx:rgb(31 121 159);--yta1219:rgb(251 248 249);--ytan8fj:rgb(36 20 27);--yta1gme:rgb(210 30 81);--yta1umi:rgb(230 214 221);--yta1thq:rgb(113 86 98);--yta1m8k:rgb(227 43 135);--ytajpel:rgb(129 18 50);--yta1am6:rgb(249 246 247)}
html{--yta1vnk:1.35rem;--ytavw57:system-ui,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;--yta131w:1220px;--yta15f6:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;--ytarwyy:10px}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:4.2rem}
body{color:var(--ytan8fj);background:var(--yta1am6);overflow-wrap:anywhere;font:16px/1.75 var(--ytavw57);margin:0}
a{color:var(--ytajpel);text-underline-offset:3px}
a:focus-visible,summary:focus-visible{outline:2px solid var(--ytajpel);outline-offset:3px;border-radius:2px}
svg{display:block}
h3,h2,h1{color:var(--ytan8fj);line-height:1.3;margin:0;font-family:var(--yta15f6)}
.ytaov8g{top:0;position:absolute;left:-999px}
.ytaov8g:focus{background:var(--yta1n0s);left:1.05rem;padding:.55rem 1.05rem;z-index:20;top:1.05rem}
.ytauamp{position:fixed;top:0;left:0;height:3px;width:100%;background:var(--ytaiucx);transform:scaleX(0);transform-origin:0 50%;z-index:15}
.yta11ns{padding:0 1.05rem;max-width:var(--yta131w);margin:0 auto}
/* masthead */
.yta1dzt{padding:calc(var(--yta1vnk)*1.2) 0 0}
.yta1f7y{justify-content:space-between;flex-wrap:wrap;padding-bottom:.55rem;color:var(--yta1thq);letter-spacing:.06em;display:flex;border-bottom:1px solid var(--yta1umi);font-size:.8rem;gap:1.05rem}
.yta1e0h{gap:.85rem;color:var(--ytan8fj);text-decoration:none;padding:calc(var(--yta1vnk)*1.4) 0 calc(var(--yta1vnk)*1.1);justify-content:center;display:flex;align-items:center}
.yta1e0h .yta1ryn{height:44px;width:44px;flex:none}
.yta1e0h b{font-weight:800;letter-spacing:.04em;line-height:1.1;font-size:clamp(2rem,5.4vw,3.55rem);font-family:var(--yta15f6)}
.ytahf3t{border-top:3px solid var(--ytan8fj);border-bottom:1px solid var(--ytan8fj);height:6px;margin:0}
/* category bar */
.ytaewru{top:0;position:sticky;background:var(--yta1am6);border-bottom:1px solid var(--yta1umi);z-index:10}
.ytaewru ul{padding:0 1.05rem;max-width:var(--yta131w);margin:0 auto;overflow-x:auto;display:flex;gap:.2rem;list-style:none;scrollbar-width:none}
.ytaewru ul::-webkit-scrollbar{display:none}
.ytaewru a{font-weight:600;color:var(--ytan8fj);padding:.75rem .9rem;border-bottom:2px solid transparent;text-decoration:none;display:block;font-size:.95rem;white-space:nowrap}
.ytaewru a:hover{color:var(--ytajpel);border-bottom-color:var(--yta1gme)}
.ytaewru li:first-child a{padding-left:0}
/* body grid */
.ytarfwf{padding-top:calc(var(--yta1vnk)*2.2);gap:calc(var(--yta1vnk)*3);padding-bottom:calc(var(--yta1vnk)*3);display:grid;grid-template-columns:minmax(0,1fr) 300px}
.yta9zxl{min-width:0}
.yta13x3{font-weight:700;color:var(--ytaiucx);display:inline-block;margin:0 0 .85rem;font-size:.8rem;text-transform:uppercase;letter-spacing:.18em}
.yta13x3::before{content:"";margin-right:.65rem;display:inline-block;background:var(--ytaiucx);height:2px;vertical-align:middle;width:1.7rem}
.ytajqyw h1{font-weight:800;line-height:1.18;font-size:clamp(1.9rem,4.6vw,3.15rem);letter-spacing:-.005em}
.yta1kad{font-size:1.2rem;color:var(--yta1thq);margin:1.05rem 0 0;line-height:1.7;max-width:40em}
.yta3a4i{padding:.75rem 0;flex-wrap:wrap;border-top:1px solid var(--yta1umi);gap:.4rem 1.25rem;color:var(--yta1thq);margin:1.15rem 0 0;font-size:.85rem;display:flex;border-bottom:1px solid var(--yta1umi)}
.yta10bv{margin:calc(var(--yta1vnk)*1.6) 0 0}
.ytaqpe4{border-radius:var(--ytarwyy);overflow:hidden;aspect-ratio:3/2;background:linear-gradient(135deg,color-mix(in srgb,var(--yta1gme) 16%,var(--yta1am6)),color-mix(in srgb,var(--yta1m8k) 6%,var(--yta1n0s)))}
.ytaqpe4 .ytaij5v{height:100%;width:100%}
.yta10bv figcaption{color:var(--yta1thq);border-left:2px solid var(--ytaiucx);padding-left:.75rem;font-size:.85rem;margin-top:.55rem}
/* reading */
.ytaspxh{margin-top:calc(var(--yta1vnk)*2.4)}
.yta19a1{font-size:1.1rem;line-height:1.95;max-width:40em;font-family:var(--yta15f6)}
.yta19a1+.yta19a1{padding-top:calc(var(--yta1vnk)*2.2);border-top:1px solid var(--yta1umi);margin-top:calc(var(--yta1vnk)*2.6)}
.yta19a1 h2{font-weight:800;font-size:clamp(1.45rem,3vw,1.95rem);margin-bottom:1.05rem}
.yta19a1 h3{font-size:1.2rem;padding-left:.75rem;border-left:3px solid var(--yta1gme);margin:1.9rem 0 .4rem}
.yta19a1 p{margin:0 0 1.1rem}
.yta19a1 ol,.yta19a1 ul{padding-left:1.35rem;margin:0 0 1.15rem}
.yta19a1 li{margin:.3rem 0}
.yta19a1 li::marker{color:var(--ytajpel)}
.yta19a1>p:first-of-type::first-letter{font-weight:800;font-size:3.3em;color:var(--ytajpel);float:left;line-height:.9;margin:.08em .12em 0 0}
/* sections in main */
.ytathcv{margin-top:calc(var(--yta1vnk)*3.2)}
.ytape1k{margin-bottom:1.25rem;gap:.85rem;border-top:3px solid var(--ytan8fj);display:flex;padding-top:.65rem;align-items:baseline}
.ytape1k h2{font-weight:800;font-size:1.5rem}
.ytape1k span{color:var(--yta1thq);font-size:.8rem;letter-spacing:.16em;white-space:nowrap}
.yta1dsh{font-size:1rem;color:var(--yta1thq);margin:-.4rem 0 1.35rem}
.ytafk69{gap:calc(var(--yta1vnk)*1.2);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}
.ytapw69{border-radius:0 0 var(--ytarwyy) var(--ytarwyy);background:var(--yta1n0s);position:relative;padding:1.7rem 1.15rem 1.15rem;border-top:4px solid var(--yta1gme)}
.ytapw69.ytajicb{border-top-color:var(--ytaiucx)}
.ytapw69.ytalhte{border-top-color:var(--yta1thq)}
.ytapw69::before{right:.95rem;content:"\201C";font:800 3.8rem/1 var(--yta15f6);position:absolute;color:color-mix(in srgb,var(--yta1gme) 35%,transparent);top:-.1rem}
.yta11et{font-weight:700;letter-spacing:.1em;color:var(--ytajpel);font-size:.8rem}
.ytapw69.ytajicb .yta11et{color:var(--ytaiucx)}
.ytapw69 h3{font-size:1.2rem;line-height:1.45;margin:.35rem 0 .45rem}
.ytapw69 p{font-size:1rem;color:var(--yta1thq);margin:0}
.yta4a7n h3{font-size:1.15rem;margin-bottom:.85rem}
.ytatd2v{counter-reset:ytavvsz;padding:0;list-style:none;margin:0}
.ytatd2v li{padding:0 0 1.15rem 3.15rem;border-left:1px dashed var(--yta1umi);margin-left:1.05rem;position:relative;counter-increment:ytavvsz}
.ytatd2v li:last-child{border-left-color:transparent}
.ytatd2v li::before{content:counter(ytavvsz);position:absolute;left:-1rem;top:0;width:2.1rem;height:2.1rem;border-radius:50%;background:var(--yta1am6);border:2px solid var(--yta1gme);display:grid;place-items:center;font-weight:800;font-size:.95rem;color:var(--ytajpel)}
.ytatd2v b,.ytatd2v strong{display:block;padding-top:.2rem}
.ytatd2v p{font-size:1rem;color:var(--yta1thq);margin:.2rem 0 0}
.ytaxikb{overflow-x:auto;border:1px solid var(--yta1umi);border-radius:var(--ytarwyy)}
.ytab5zf{width:100%;border-collapse:collapse;font-size:.95rem;min-width:31.5rem}
.ytab5zf caption{font-weight:700;text-align:left;padding:.75rem .95rem;caption-side:top}
.ytab5zf td,.ytab5zf th{padding:.65rem .95rem;border-top:1px solid var(--yta1umi);text-align:left;vertical-align:top}
.ytab5zf thead th{letter-spacing:.04em;background:var(--yta1n0s);font-size:.85rem}
.ytab5zf tbody th{font-weight:600}
.ytaq7x8{gap:0;display:grid}
.yta1pjy{padding:1.05rem 0;border-bottom:1px solid var(--yta1umi)}
.yta1pjy h3{font-size:1.1rem;gap:.65rem;display:flex}
.yta1pjy h3::before{width:1.6rem;border-radius:var(--ytarwyy);font-size:.85rem;height:1.6rem;place-items:center;display:grid;background:var(--yta1gme);color:var(--yta1219);flex:none;content:"问";margin-top:.1rem}
.yta1pjy p{margin:.45rem 0 0 2.2rem;color:var(--yta1thq)}
/* sidebar */
.yta1b2c{flex-direction:column;display:flex;min-width:0;gap:calc(var(--yta1vnk)*1.8)}
.yta60pf h2,.ytaujue h2{font-weight:800;padding-bottom:.45rem;font-family:var(--ytavw57);font-size:.85rem;margin:0 0 .85rem;border-bottom:2px solid var(--ytan8fj);letter-spacing:.18em}
.ytakh19{background:var(--yta1n0s);border:1px solid var(--yta1umi);border-radius:var(--ytarwyy);padding:1.15rem}
.ytakh19 h2{border-bottom-color:var(--yta1gme)}
.ytakh19 p{font-size:.9rem;color:var(--yta1thq);margin:0 0 .85rem}
.ytakh19 ul{grid-template-columns:1fr 1fr;display:grid;padding:0;gap:.55rem;list-style:none;margin:0}
.ytakh19 a{display:flex;align-items:center;gap:.45rem;padding:.65rem .7rem;border-radius:var(--ytarwyy);background:var(--yta1am6);border:1px solid var(--yta1umi);color:var(--ytan8fj);text-decoration:none;font-size:.9rem;font-weight:600}
.ytakh19 a:hover{border-color:var(--yta1gme)}
.ytakh19 svg{width:18px;height:18px;flex:none;fill:none;stroke:var(--ytajpel);stroke-width:1.8}
.yta17ll{gap:.8rem;display:grid;margin:0}
.yta17ll dt{font-weight:700;font-size:.95rem}
.yta17ll dd{font-size:.9rem;color:var(--yta1thq);margin:.1rem 0 0;line-height:1.6}
.ytaulmx{flex-direction:column;display:flex}
.ytaulmx a{color:var(--ytan8fj);text-decoration:none;padding:.55rem 0;border-bottom:1px dotted var(--yta1umi);font-size:.95rem}
.ytaulmx a::before{margin-right:.55rem;color:var(--ytajpel);content:"→"}
.ytaulmx a:hover{color:var(--ytajpel)}
.yta60pf ul{counter-reset:yta1jo6;padding:0;list-style:none;margin:0}
.yta60pf li{padding:.6rem 0;counter-increment:yta1jo6;line-height:1.5;display:flex;border-bottom:1px solid var(--yta1umi);gap:.75rem;font-size:.95rem}
.yta60pf li::before{color:var(--ytaiucx);font:800 1.35rem/1 var(--yta15f6);content:counter(yta1jo6);min-width:1.15rem}
.yta60pf a{color:var(--ytan8fj);text-decoration:none}
.yta60pf a:hover{color:var(--ytajpel);text-decoration:underline}
.yta1n2n{flex-wrap:wrap;display:flex;gap:.4rem}
.yta1n2n a{font-size:.85rem;padding:.25rem .7rem;border:1px solid var(--yta1umi);border-radius:999px;color:var(--yta1thq);text-decoration:none}
.yta1n2n a:nth-child(3n+1){color:var(--ytan8fj);font-size:.95rem}
.yta1n2n a:hover{border-color:var(--yta1gme);color:var(--ytajpel)}
/* colophon */
.ytae59a{font-size:.9rem;border-top:1px solid var(--yta1umi);color:var(--yta1thq);padding:calc(var(--yta1vnk)*2) 1.05rem calc(var(--yta1vnk)*2.4);text-align:center}
.ytae59a .yta1ryn{width:28px;height:28px;margin:0 auto .55rem}
.ytae59a b{color:var(--ytan8fj);display:block;letter-spacing:.05em;font-size:1.15rem;font-family:var(--yta15f6)}
.ytae59a p{margin:.3rem 0}
@media (max-width:900px){
.ytarfwf{grid-template-columns:minmax(0,1fr);gap:calc(var(--yta1vnk)*2.6)}
.yta1b2c{grid-template-columns:repeat(auto-fit,minmax(15.75rem,1fr));display:grid}
}
@media (max-width:560px){
body{font-size:15px}
.ytafk69{grid-template-columns:minmax(0,1fr)}
.yta19a1{font-size:1.05rem;line-height:1.85}
.yta1f7y span:last-child{display:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.ytauamp{display:none}}
.ytai2dk{justify-content:space-between;padding:.95rem 0 .85rem;display:flex;border-bottom:3px double var(--ytan8fj);align-items:center;gap:1.05rem}
.yta1qyr .yta1e0h{justify-content:flex-start;padding:0}
.yta1qyr .yta1e0h b{font-size:clamp(1.45rem,3.4vw,2.2rem)}
.yta1qyr .yta1f7y{align-items:flex-end;border:0;flex-direction:column;padding:0;gap:.1rem}
.ytarot1 .yta1e0h{padding-top:1.25rem}
.ytazowm{grid-template-columns:1fr}
.yta6eb3{grid-template-columns:repeat(2,minmax(0,1fr));gap:1.25rem}
.yta1rjm{max-width:var(--yta131w);gap:2.1rem;margin:0 auto;text-align:left;grid-template-columns:1fr 1fr;display:grid;padding-right:1.05rem;padding-left:1.05rem}
.yta1rjm .yta1e0h{padding:0 0 .55rem;justify-content:flex-start}
.yta1rjm .yta1e0h b{font-size:1.45rem}
@media (max-width:640px){.yta1rjm,.yta6eb3{grid-template-columns:1fr}.ytai2dk{align-items:flex-start;flex-direction:column}.yta1qyr .yta1f7y{align-items:flex-start}}


.yta1762{color:var(--yta1thq);margin:.95rem 0 0;font-size:.85rem}.yta1762 span{margin-right:.55rem;opacity:.8}.yta1762 a{color:var(--yta1thq)}
h1{text-wrap:balance}