.article-hero{padding:76px 0 56px}.article-hero h1{font-size:clamp(40px,5.4vw,76px);font-weight:600;letter-spacing:var(--tr-display);line-height:1;max-width:15ch;margin-top:24px}.article-hero .ah-lede{margin-top:30px;display:grid;grid-template-columns:1fr 1fr;gap:14px 56px;max-width:920px}.article-hero .ah-lede p{font-size:17px;line-height:1.62;color:var(--ink-2)}.article-hero .ah-lede p b{color:var(--ink);font-weight:600}.chapter{display:block;margin-bottom:22px}.chapter .cnum{display:block;font-family:var(--mono);font-size:17px;color:var(--accent);letter-spacing:.08em;text-transform:uppercase;margin-bottom:16px}.chapter h2{font-size:clamp(26px,3.2vw,40px);font-weight:600;letter-spacing:var(--tr-tight);line-height:1.08}.chapter h2 .dim{color:var(--ink-3)}.mth-prose{max-width:64ch}.mth-prose p{font-size:17px;line-height:1.62;color:var(--ink-2);margin-bottom:18px}.mth-prose p b{color:var(--ink);font-weight:600}.mth-spine{display:grid;grid-template-columns:1fr 56px 1fr 56px 1fr;align-items:stretch;margin:8px 0 28px}.mth-spine .spine-node{background:var(--surf);border:1px solid var(--rule);padding:30px 28px 32px}.mth-spine .spine-node .sn-k{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--ink-3);text-transform:uppercase}.mth-spine .spine-node h3{font-size:28px;font-weight:600;letter-spacing:-.025em;margin:12px 0}.mth-spine .spine-node p{font-size:14.5px;color:var(--ink-2);line-height:1.55}.mth-spine .spine-node p .mono{font-family:var(--mono);color:var(--accent);font-size:13px}.mth-spine .spine-node.is-out{background:var(--ink);border-color:var(--ink)}.mth-spine .spine-node.is-out .sn-k{color:#5b86ff}.mth-spine .spine-node.is-out h3{color:#fff}.mth-spine .spine-node.is-out p{color:#aab3bd}.mth-spine .spine-node.is-out p .mono{color:#5b86ff}.mth-spine .mth-spine-arrow{display:flex;align-items:center;justify-content:center;color:var(--ink-4);font-size:20px}.constraint{font-size:18px;color:var(--ink);line-height:1.5;max-width:70ch;font-weight:500;letter-spacing:-.01em}.constraint b{font-weight:600}.mth-evidence{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px}.mth-evidence .ev{border:1px solid var(--rule);border-radius:4px;padding:22px 24px;background:var(--surf)}.mth-evidence .ev .ev-src{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}.mth-evidence .ev p{font-size:15px;color:var(--ink-2);line-height:1.55;margin:0}.mth-evidence .ev p .fn-ref{font-family:var(--mono);font-size:.62em;color:var(--accent);vertical-align:super;text-decoration:none}.converge{display:flex;flex-direction:column;align-items:stretch;gap:0;margin:8px 0;max-width:880px}.cv-side{border:1px solid var(--rule);background:var(--surf);padding:24px 28px;display:grid;grid-template-columns:200px 1fr;gap:28px;align-items:start}.cv-side .cv-h{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}.cv-side .cv-h b{display:block;color:var(--ink);font-size:15px;font-family:var(--sans);font-weight:600;letter-spacing:-.01em;margin-top:6px;text-transform:none}.cv-side p{font-size:14.5px;color:var(--ink-2);line-height:1.55;margin:0}.cv-side p b{color:var(--ink);font-weight:600}.cv-arrow{text-align:center;color:var(--accent);font-size:18px;line-height:1;padding:8px 0}.cv-core{border:1.5px solid var(--accent);background:var(--signal-tint);padding:20px 28px;text-align:center}.cv-core .lbl{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:6px}.cv-core .v{font-size:19px;font-weight:600;letter-spacing:-.015em;color:var(--ink)}.converge-note{margin-top:24px;font-size:16px;color:var(--ink-3);line-height:1.6;max-width:72ch}.converge-note b{color:var(--ink);font-weight:600}.mth-stages{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule)}.mth-stages .stage{background:var(--surf);padding:26px 24px 28px;display:flex;flex-direction:column}.mth-stages .stage .st-top{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:4px}.mth-stages .stage .st-n{font-family:var(--mono);font-size:12px;color:var(--accent)}.mth-stages .stage .st-dur{font-family:var(--mono);font-size:10px;letter-spacing:.04em;color:var(--ink-4);text-transform:uppercase}.mth-stages .stage h3{font-size:21px;font-weight:600;letter-spacing:-.02em;margin:8px 0 16px}.mth-stages .stage ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}.mth-stages .stage li{font-size:13.5px;color:var(--ink-2);line-height:1.35;padding-left:16px;position:relative}.mth-stages .stage li:before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;background:var(--rule)}.mth-stages .stage.is-build li:before{background:var(--accent)}.stages-note{margin-top:20px;font-size:15px;color:var(--ink-3);line-height:1.6;max-width:74ch}.stages-note b{color:var(--ink);font-weight:600}.triad{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.triad .own{border:1px solid var(--rule);border-top:3px solid var(--ink);border-radius:0 0 4px 4px;padding:26px 26px 28px;background:var(--surf)}.triad .own.shared{border-top-color:var(--accent)}.triad .own .ow-k{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);margin-bottom:12px}.triad .own h3{font-size:20px;font-weight:600;letter-spacing:-.02em;line-height:1.18;margin-bottom:12px}.triad .own h3 .accent{color:var(--accent)}.triad .own p{font-size:14.5px;color:var(--ink-2);line-height:1.58}.engine{background:var(--ink);color:#fff;border-radius:6px;padding:clamp(36px,4vw,56px);position:relative;overflow:hidden}.engine .eng-tag{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:#5b86ff;margin-bottom:20px}.engine h2{font-size:clamp(26px,3vw,38px);font-weight:600;letter-spacing:var(--tr-tight);line-height:1.1;max-width:22ch;color:#fff}.engine p{margin-top:20px;font-size:16.5px;line-height:1.6;color:#aab3bd;max-width:64ch}.engine p b{color:var(--dk-ink);font-weight:600}.engine p .eng-link{font-family:var(--mono);font-size:13px;letter-spacing:.04em;color:#5b86ff;text-decoration:none;white-space:nowrap}.engine p .eng-link:hover{text-decoration:underline}.engine .eng-mark{position:absolute;right:-70px;bottom:-70px;width:320px;height:320px;opacity:.06}.pull-band{background:var(--dk-bg);color:var(--dk-ink)}.pull{max-width:34ch;padding:4px 0}.pull .q{font-family:var(--serif);font-style:italic;font-size:clamp(24px,2.8vw,34px);line-height:1.16;color:#fff;letter-spacing:-.01em}.pull .sub{margin-top:22px;font-size:17px;color:#aab3bd;line-height:1.6;max-width:60ch}.pull .sub b{color:var(--dk-ink);font-weight:600}.mth-footnotes{padding:40px 0 8px;border-top:1px solid var(--rule)}.mth-footnotes ol{margin:0;padding:0;list-style:none;counter-reset:fn;display:flex;flex-direction:column;gap:14px;max-width:80ch}.mth-footnotes li{counter-increment:fn;font-size:13px;color:var(--ink-3);line-height:1.55;padding-left:26px;position:relative}.mth-footnotes li:before{content:counter(fn);position:absolute;left:0;top:0;font-family:var(--mono);font-size:11px;color:var(--accent)}.mth-footnotes a.src-link{color:var(--ink-2);border-bottom:1px solid var(--rule);transition:color .14s ease,border-color .14s ease}.mth-footnotes a.src-link:hover{color:var(--accent);border-color:var(--accent)}.mth-footnotes a.src-link .ext{font-family:var(--mono);font-size:.78em;color:var(--ink-3);margin-left:5px;letter-spacing:.04em}.mth-footnotes a.src-link:hover .ext{color:var(--accent)}.wnext{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule)}.wnext a{background:var(--surf);padding:30px 28px 32px;display:flex;flex-direction:column;gap:10px;transition:background .16s ease}.wnext a:hover{background:#fbfcfd}.wnext a .k{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent)}.wnext a .t{font-size:21px;font-weight:600;letter-spacing:-.02em}.wnext a .d{font-size:14px;color:var(--ink-3);line-height:1.5}.wnext a .go{font-family:var(--mono);font-size:13px;color:var(--ink);margin-top:4px}.wnext a:hover .go{color:var(--accent)}@media(max-width:1080px){.article-hero .ah-lede,.mth-evidence,.triad,.mth-spine{grid-template-columns:1fr}.mth-spine .mth-spine-arrow{justify-content:center;height:40px;font-size:24px;transform:rotate(90deg)}.mth-stages{grid-template-columns:1fr 1fr}}@media(max-width:760px){.mth-stages,.wnext{grid-template-columns:1fr}.cv-side{grid-template-columns:1fr;gap:10px}.chapter .cnum{font-size:15px;margin-bottom:12px}.mth-stages .stage,.triad .own{padding:22px 22px 24px}.cv-side,.mth-evidence .ev{padding:20px 22px}.mth-spine .spine-node{padding:24px 22px}.pull .q{font-size:clamp(22px,7vw,30px)}}