/* Content-only styles. Shared site shell remains unchanged. */
#page.nc-page{padding-top:42px;padding-bottom:64px}
.nc-article{--nc-blue:#223d60;--nc-soft:#e8edf2;max-width:1080px;margin:0 auto;font-size:16px;line-height:1.85}
.nc-article p{margin-bottom:18px}.nc-article strong{font-weight:650}.nc-kicker{display:flex;align-items:center;gap:18px;font-size:12px;font-weight:650;letter-spacing:.12em;color:var(--ink-2)}.nc-kicker:before{content:"";width:24px;height:3px;background:var(--accent)}.nc-kicker span{border-left:1px solid var(--rule-2);padding-left:18px;color:var(--muted);font-weight:400;letter-spacing:.06em}
.nc-intro{max-width:none}.nc-intro h1{font-family:var(--sans);font-size:clamp(32px,3.8vw,52px);letter-spacing:-.035em;line-height:1.16;font-weight:650;margin:22px 0}.nc-intro h1:lang(zh-CN){font-size:clamp(30px,3.55vw,48px);letter-spacing:-.01em;line-height:1.35}.nc-lead{max-width:none;font-size:18px;line-height:1.85;color:var(--ink-2)}
.nc-diagram{margin:36px 0 52px;padding:30px 32px 20px;background:var(--nc-soft);border-top:2px solid var(--nc-blue);display:grid;grid-template-columns:minmax(0,1fr) 74px minmax(0,1fr);align-items:center;gap:0 16px}.nc-mini{font-size:12px!important;letter-spacing:.06em;font-weight:550;color:var(--muted);margin:0 0 17px!important}.nc-names>div{font-size:clamp(17px,1.7vw,22px);line-height:1.8;white-space:nowrap;margin:4px 0}.nc-names>div strong{color:var(--accent);border-bottom:1px solid currentColor;font-weight:650}.nc-names>div span{color:var(--ink-2)}.nc-connection{height:106px;position:relative;margin-top:28px;align-self:center}.nc-connection span{position:absolute;width:34px;border-top:1px solid #9aaabc;left:0;top:0}.nc-connection span:first-child{height:53px;border-right:1px solid #9aaabc}.nc-connection span:nth-child(2){top:50%;width:74px}.nc-connection span:last-child{top:50%;height:53px;border-right:1px solid #9aaabc;border-top:0;border-bottom:1px solid #9aaabc}.nc-code-result{padding:25px 26px 20px;background:var(--nc-blue);color:#fff}.nc-code-result .nc-mini{color:#c3cedd}.nc-letters{display:flex;gap:7px}.nc-letters span{font:500 clamp(29px,3.2vw,44px)/1.25 ui-monospace,SFMono-Regular,Consolas,monospace;display:block;text-align:center;border:1px solid #718197;padding:5px 0;flex:1;max-width:59px}.nc-code-result>p:last-child{font-size:14px;color:#d3dce6;margin:14px 0 0}.nc-diagram figcaption{grid-column:1/-1;font-size:12px;line-height:1.7;color:var(--muted);margin-top:19px}
.nc-section{display:grid;grid-template-columns:200px minmax(0,1fr);gap:38px;padding:32px 0 38px;border-top:1px solid var(--rule-2)}.nc-section-heading .nc-number{display:block;color:var(--accent);font:500 13px/1.4 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.1em;margin:3px 0 16px}.nc-section h2{font-family:var(--sans);font-size:23px;font-weight:600;line-height:1.5;margin:0 0 14px}.nc-section-heading>p{font-size:13px;color:var(--muted);line-height:1.65}.nc-section-body{min-width:0}.nc-section-body p:last-child{margin-bottom:0}.nc-equation{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:17px 0;margin:22px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);font-size:14px}.nc-equation span{padding:3px 7px;background:var(--nc-soft);color:var(--ink)}.nc-equation span:last-child{padding-left:0;background:transparent;color:var(--muted)}.nc-equation b{font-weight:400;font-size:23px;color:var(--accent)}
.nc-rules{margin-top:25px}.nc-rule{display:grid;grid-template-columns:minmax(0,1fr) minmax(230px,1fr);gap:22px;padding:22px 0;border-top:1px solid var(--rule)}.nc-rule h3{font-family:var(--sans);font-size:16px;margin:0 0 5px;line-height:1.6}.nc-rule p{font-size:14px;line-height:1.7;color:var(--muted);margin:0}.nc-example{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin:4px 0;font-size:14px}.nc-article code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:1em}.nc-example code{flex:0 0 4.5em;text-align:right;font-size:16px;letter-spacing:.08em;color:var(--primary);font-weight:650}.nc-example span{min-width:0}.nc-scope{font-size:14px;color:var(--muted);border-left:2px solid var(--rule-2);padding-left:16px;margin-top:19px}
.nc-takeaway{font-size:22px;line-height:1.65;font-weight:550;color:var(--ink);max-width:680px}.nc-refund{border-left:3px solid var(--accent);padding:2px 0 2px 20px;margin-top:28px}.nc-refund h3{font-size:15px;margin-bottom:10px}.nc-refund p{font-size:14px;color:var(--ink-2);line-height:1.85;margin-bottom:10px}.nc-refund a{text-decoration:underline;text-underline-offset:3px}.nc-next ol{list-style:none;padding:0;margin:0;counter-reset:ncsteps}.nc-next li{position:relative;padding-left:32px;margin:0 0 22px;counter-increment:ncsteps}.nc-next li:before{content:counter(ncsteps)".";position:absolute;left:0;top:0;color:var(--muted);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:14px}.nc-next li:last-child{margin-bottom:0}.nc-next strong{display:block;font-size:16px;margin-bottom:5px}.nc-next li span{display:block;color:var(--ink-2);font-size:15px;line-height:1.8}.nc-sources{border-top:1px solid var(--rule-2);padding-top:22px;color:var(--muted);font-size:12px;line-height:1.8}.nc-sources p{letter-spacing:.1em;font-size:11px;margin-bottom:8px}.nc-sources a{font-size:13px;text-decoration:underline;text-underline-offset:4px;display:inline-block;margin-bottom:9px;color:var(--ink-2)}.nc-sources span{display:block;max-width:820px}
html[data-theme=dark] .nc-article{--nc-blue:#243c58;--nc-soft:#1b2a3a}
@media(max-width:1100px){.nc-section{grid-template-columns:172px minmax(0,1fr);gap:25px}.nc-rule{grid-template-columns:minmax(0,1fr);gap:10px}.nc-rule .nc-example{max-width:390px}.nc-diagram{grid-template-columns:minmax(0,1fr) 44px minmax(0,1fr);padding:24px;gap:0 10px}.nc-connection span:nth-child(2){width:44px}.nc-connection span{width:22px}.nc-code-result{padding:22px 18px}.nc-names>div{font-size:19px}}
@media(max-width:760px){#page.nc-page{padding-top:28px}.nc-intro h1{font-size:35px}.nc-intro h1:lang(zh-CN){font-size:32px}.nc-section{grid-template-columns:minmax(0,1fr);gap:16px;padding:26px 0 30px}.nc-section-heading{display:grid;grid-template-columns:30px minmax(0,1fr);gap:0 8px}.nc-section-heading .nc-number{margin-top:7px}.nc-section h2{font-size:23px;margin:0}.nc-section-heading>p{grid-column:2;margin:5px 0 0}.nc-lead{font-size:17px}.nc-diagram{grid-template-columns:minmax(0,1fr);padding:22px;margin:28px 0 36px}.nc-names>div{font-size:21px}.nc-connection{height:24px;margin:14px 0;width:1px;background:#9aaabc;justify-self:center}.nc-connection span{display:none}.nc-code-result{padding:20px}.nc-diagram figcaption{font-size:12px}.nc-letters span{font-size:34px;max-width:56px}.nc-takeaway{font-size:21px}.nc-kicker{font-size:11px;gap:12px}.nc-kicker span{padding-left:12px}.nc-kicker:before{width:18px}.nc-section-body{font-size:16px}.nc-equation{font-size:13px;gap:8px}.nc-refund{padding-left:15px}}
@media(min-width:600px) and (max-width:760px){.nc-diagram{grid-template-columns:minmax(0,1fr) 34px minmax(0,1fr);gap:10px}.nc-connection{height:1px;width:34px;margin:0}.nc-code-result{padding:18px}.nc-names>div{font-size:19px}}
@media(max-width:360px){.nc-intro h1{font-size:31px}.nc-intro h1:lang(zh-CN){font-size:28px}.nc-diagram{padding:18px}.nc-names>div{font-size:19px}.nc-article{font-size:15px}.nc-section h2{font-size:22px}}
@media print{.nc-article{max-width:none}.nc-diagram,.nc-refund,.nc-rule{break-inside:avoid}.nc-section{display:block}.nc-section-heading{margin-bottom:18px}.nc-intro h1{font-size:34px}.nc-code-result{-webkit-print-color-adjust:exact;print-color-adjust:exact}}