:root{color-scheme:light;--paper:oklch(98% .006 160);--ink:oklch(25% .025 160);--muted:oklch(46% .025 160);--green:oklch(37% .065 160);--line:oklch(86% .018 160);--wash:oklch(94% .022 160);font-family:system-ui,"Noto Sans CJK SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}html{scroll-padding-top:2rem}body{margin:0;font-size:16px;line-height:1.8}a{color:var(--green);text-underline-offset:.22em;text-decoration-thickness:1px}a:hover{text-decoration:underline}a:focus-visible{outline:3px solid var(--green);outline-offset:5px}header,main,footer{width:min(1120px,calc(100% - 64px));margin-inline:auto}header{display:flex;align-items:center;justify-content:space-between;min-height:104px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:8px;font-size:21px;letter-spacing:-.6px;text-decoration:none;color:var(--ink)}.brand strong{font-weight:400;color:var(--muted)}.brand-mark{display:grid;place-items:center;width:35px;height:35px;background:var(--green);color:var(--paper);border-radius:5px;font-weight:700;letter-spacing:-2px;margin-right:5px}nav{display:flex;gap:28px;font-size:14px}nav a{text-decoration:none}.intro{display:grid;grid-template-columns:1.2fr 1fr;gap:58px;align-items:center;padding:88px 0 96px}.eyebrow{color:var(--green);font-size:11px;font-weight:650;letter-spacing:.15em;margin:0 0 20px}h1,h2,h3{line-height:1.4;letter-spacing:-.025em}h1{font-size:clamp(32px,3.4vw,46px);font-weight:700;margin:0 0 26px;line-height:1.5}.lead{font-size:17px;line-height:1.95;max-width:37em;color:var(--muted);margin:0 0 30px}.read-link{display:inline-flex;gap:35px;align-items:center;text-decoration:none;font-weight:650;font-size:15px;padding-bottom:8px;border-bottom:1px solid var(--green)}.diagram{margin:16px 0 0;background:var(--wash);padding:24px 20px 12px;color:var(--green);border-radius:8px}.diagram figcaption{font-size:12px;font-weight:600}.diagram svg{display:block;width:100%;height:auto}.diagram-node rect{fill:var(--paper);stroke:var(--line);stroke-width:1}.diagram-text{fill:var(--green);font-size:14px;font-weight:650}.diagram-label{fill:var(--muted);font-size:12px;font-weight:400}.diagram p{font-size:12px;margin:0 0 2px;text-align:right}.section-head{display:flex;align-items:baseline;justify-content:space-between;border-bottom:2px solid var(--ink);padding-bottom:18px}.section-head h2{margin:0;font-size:25px}.section-head>span{color:var(--muted);font-size:12px}.note-row{display:grid;grid-template-columns:104px 1fr 94px;gap:20px;padding:30px 0;border-bottom:1px solid var(--line);align-items:start}.topic{font-size:12px;color:var(--green);padding-top:6px}.note-row h3{font-size:21px;font-weight:650;margin:0 0 10px}.note-row h3 a{color:var(--ink);text-decoration:none}.note-row h3 a:hover{color:var(--green);text-decoration:underline}.note-row h3 span{color:var(--green);font-size:16px}.note-row p{font-size:14px;margin:0;color:var(--muted);max-width:47em}.note-row time{font-size:12px;color:var(--muted);text-align:right;padding-top:6px;white-space:nowrap}.approach{display:grid;grid-template-columns:1fr 1.25fr;gap:100px;padding:88px 0 92px}.approach h2{font-size:29px;line-height:1.6;margin:0}.approach p{margin:0 0 17px;font-size:15px;color:var(--muted)}.approach a{font-size:14px}footer{border-top:1px solid var(--line);padding:36px 0 24px;color:var(--muted);font-size:12px}.footer-brand{font-size:17px;font-weight:650;color:var(--ink);text-decoration:none}footer p{margin:9px 0 28px}footer>div{display:flex;gap:25px;flex-wrap:wrap}footer>div span{margin-right:auto}footer a{color:inherit}.article{max-width:72ch;margin:58px auto 80px;min-height:40vh}.breadcrumb{display:inline-block;text-decoration:none;font-size:13px;margin-bottom:40px}.article-meta{font-size:12px;color:var(--muted);margin-bottom:18px}.article h1{font-size:clamp(29px,3.5vw,40px);line-height:1.5}.abstract{font-size:18px;line-height:1.9;color:var(--muted);margin-bottom:36px;padding-bottom:32px;border-bottom:1px solid var(--line)}.prose{font-size:16px;line-height:1.95}.prose h2{font-size:25px;margin:42px 0 16px}.prose p{margin:0 0 20px}.prose li{padding-left:5px;margin-bottom:10px}.prose code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.86em;background:var(--wash);padding:.12em .3em;border-radius:3px}.prose pre{padding:22px 24px;background:var(--wash);border:1px solid var(--line);border-radius:6px;overflow-x:auto;line-height:1.7;margin:24px 0}.prose pre code{padding:0;font-size:13px;white-space:pre}.prose .reference{font-size:13px;color:var(--muted);margin-top:36px}.article-end{border-top:1px solid var(--line);margin-top:44px;padding-top:22px;font-size:14px}.article-end p{color:var(--muted)}.skip{position:absolute;left:20px;top:-80px;background:var(--green);color:var(--paper);padding:8px 18px;z-index:10}.skip:focus{top:10px}
@media(max-width:800px){header,main,footer{width:calc(100% - 40px)}header{min-height:84px}.brand{font-size:18px}nav{gap:18px;font-size:13px}.intro{grid-template-columns:1fr;gap:32px;padding:48px 0 60px}.intro h1{font-size:35px}.diagram{max-width:520px;margin:0}.note-row{grid-template-columns:70px 1fr;gap:14px;padding:24px 0}.note-row h3{font-size:19px}.note-row time{grid-column:2;text-align:left;padding-top:0}.approach{grid-template-columns:1fr;gap:24px;padding:55px 0}.approach h2{font-size:26px}.article{margin:35px auto 55px}.article .breadcrumb{margin-bottom:28px}.prose pre{padding:17px}.section-head>span{font-size:10px}}
@media(max-width:420px){.brand strong{display:none}nav{gap:16px}.intro h1{font-size:30px}.section-head h2{font-size:23px}.note-row{grid-template-columns:1fr;gap:8px}.note-row time{grid-column:1}.topic{padding:0}.abstract{font-size:16px}footer>div span{flex-basis:100%}}
