@charset "UTF-8";
:root{color-scheme:light;--paper:oklch(98% .007 95);--ink:oklch(27% .018 155);--muted:oklch(49% .018 155);--green:oklch(38% .065 153);--soft:oklch(93% .025 137);--line:oklch(86% .015 125);--space:clamp(22px,5vw,72px)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:5px}a:hover{color:var(--green)}a:focus-visible{outline:2px solid var(--green);outline-offset:6px;border-radius:2px}::selection{background:var(--soft)}p{max-width:66ch}h1,h2,h3,p,figure{margin:0}h1,h2,h3{font-weight:600;line-height:1.35}h1{font-size:clamp(34px,5.1vw,64px);letter-spacing:-.055em}h2{font-size:clamp(24px,3vw,32px);letter-spacing:-.035em}h3{font-size:21px;letter-spacing:-.025em}.wrap{max-width:1160px;margin:auto;padding-inline:var(--space)}.skip{position:absolute;top:-80px;left:20px;background:var(--paper);padding:10px 18px;z-index:5}.skip:focus{top:12px}.header{min-height:112px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:10px;font-size:21px;font-weight:650;letter-spacing:.08em;text-decoration:none}.brand svg{width:25px;height:30px}.nav{display:flex;align-items:center;gap:clamp(18px,3vw,36px)}.nav a{font-size:14px;color:var(--muted);text-decoration:none;padding-block:8px}.nav a[aria-current=page]{color:var(--ink);box-shadow:0 1px var(--green)}.hero{display:grid;grid-template-columns:1.5fr 1fr;align-items:center;gap:36px;padding-block:clamp(62px,8vw,106px)}.kicker{color:var(--green);font-size:13px;letter-spacing:.11em;display:block;margin-bottom:24px}.hero h1 span{display:block}.lead{font-size:17px;color:var(--muted);line-height:1.95;max-width:29em;margin-top:26px}.text-link{display:inline-flex;align-items:center;gap:20px;margin-top:30px;text-decoration:none;font-size:14px;padding-bottom:5px;border-bottom:1px solid var(--green)}.arrow{font-size:20px;line-height:1;transition:transform .2s ease-out}.text-link:hover .arrow,.note-link:hover .arrow{transform:translateX(4px)}.illustration{position:relative;padding:20px 0 10px 20px}.illustration svg{display:block;width:100%;max-width:310px;margin:auto;color:var(--green)}.illustration figcaption{text-align:center;font-size:12px;color:var(--muted);margin-top:16px;letter-spacing:.08em}.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:25px;margin-bottom:22px}.section-head>a{font-size:13px;color:var(--muted)}.notes-section{padding-block:8px 64px}.note-link{display:grid;grid-template-columns:54px 1fr auto;align-items:center;gap:20px;text-decoration:none;border-top:1px solid var(--line);padding:25px 0}.note-link:last-child{border-bottom:1px solid var(--line)}.note-number{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}.note-link h3{margin-bottom:5px;font-size:20px}.note-link p{font-size:14px;color:var(--muted)}.note-link .arrow{color:var(--green)}.quiet-band{padding-block:34px 50px;display:flex;gap:50px;justify-content:space-between;align-items:baseline}.quiet-band h2{font-size:19px;flex-shrink:0}.quiet-band p{color:var(--muted);font-size:15px;max-width:40em}.footer{border-top:1px solid var(--line);padding-block:25px 34px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:var(--muted)}.page-intro{padding-block:66px 46px;max-width:760px}.page-intro h1{font-size:clamp(34px,4vw,48px)}.page-intro .lead{max-width:40em}.notes-layout{display:grid;grid-template-columns:180px minmax(0,1fr);gap:clamp(36px,6vw,80px);padding-block:5px 80px}.contents{align-self:start;position:sticky;top:24px;font-size:13px}.contents p{font-size:12px;color:var(--muted);margin-bottom:12px}.contents a{display:block;text-decoration:none;margin-block:10px;color:var(--muted)}.article{scroll-margin-top:40px;padding-block:32px 38px;border-top:1px solid var(--line);max-width:690px}.article .topic{display:block;margin-bottom:12px;font-size:12px;color:var(--green)}.article h2{font-size:28px;margin-bottom:20px}.article p{color:var(--muted);margin-bottom:15px}.article p:last-child{margin:0}.article ol{color:var(--muted);padding-left:1.5em;margin-block:14px 20px}.article li{padding-left:6px;margin-bottom:8px}.article strong{font-weight:600;color:var(--ink)}.about-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(160px,.7fr);gap:70px;max-width:900px;padding-bottom:86px}.prose p{margin-bottom:22px;color:var(--muted)}.prose h2{font-size:23px;margin:38px 0 18px}.colophon{border-top:1px solid var(--line);padding-top:20px;align-self:start;margin-top:6px}.colophon h2{font-size:15px;margin-bottom:14px}.colophon p{font-size:13px;color:var(--muted);margin-bottom:12px}.back-link{display:inline-block;margin-top:14px;font-size:14px}.small-print{font-size:13px;color:var(--muted)}
@media(max-width:760px){.header{min-height:88px}.hero{grid-template-columns:1fr .75fr;gap:12px}.hero h1{font-size:clamp(32px,5.4vw,44px)}.hero .lead{font-size:15px}.illustration{padding-left:0}.notes-layout{grid-template-columns:1fr;gap:20px}.contents{position:static;display:flex;gap:18px;flex-wrap:wrap;padding-bottom:8px}.contents p{width:100%;margin-bottom:0}.contents a{margin:0}.about-layout{grid-template-columns:1fr;gap:20px}.colophon{max-width:500px}.quiet-band{display:block}.quiet-band h2{margin-bottom:14px}}
@media(max-width:540px){.wrap{padding-inline:23px}.header{gap:12px}.brand{font-size:18px;gap:7px}.brand svg{width:21px}.nav{gap:20px}.nav a{font-size:13px}.hero{grid-template-columns:1fr;padding-top:52px;padding-bottom:50px}.hero h1{font-size:39px}.hero .lead{font-size:16px}.illustration{display:none}.kicker{margin-bottom:19px}.section-head h2{font-size:23px}.note-link{grid-template-columns:26px 1fr 18px;gap:12px;padding:23px 0}.note-link h3{font-size:18px}.note-link p{font-size:13px}.notes-section{padding-bottom:36px}.quiet-band{padding-bottom:40px}.footer{flex-direction:column;gap:6px}.page-intro{padding-top:46px}.page-intro .lead{font-size:16px}.article h2{font-size:25px}.contents{gap:14px}.contents a{font-size:12px}.about-layout{padding-bottom:50px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}