:root{color-scheme:light;--paper:#f7f7f2;--ink:#24332d;--muted:#647168;--line:#dce2d8;--green:#315c46}
*{box-sizing:border-box}
html{font-size:16px;scroll-behavior:auto}
body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:4px}
a:focus-visible{outline:2px solid var(--green);outline-offset:5px}
.page{max-width:1024px;margin:auto;padding:0 48px}
.header{display:flex;align-items:center;justify-content:space-between;padding:32px 0;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px;font-size:17px;font-weight:600;letter-spacing:.08em;text-decoration:none}
.mark{display:grid;place-items:center;width:33px;height:33px;background:var(--green);color:var(--paper);border-radius:5px;font-family:serif;font-weight:400;font-size:20px}
.domain{font-size:13px;color:var(--muted);letter-spacing:.05em}
.intro{padding:76px 0 62px}
.eyebrow{margin:0 0 20px;color:var(--green);font-size:13px;letter-spacing:.18em}
h1{margin:0 0 22px;font-family:"Noto Serif CJK SC","Songti SC",SimSun,serif;font-size:clamp(32px,5.5vw,52px);font-weight:500;line-height:1.4;letter-spacing:.04em}
.lead{margin:0;color:var(--muted);font-size:17px;line-height:2}
.notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:28px 0 32px}
.number{color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}
h2{font-size:17px;font-weight:600;letter-spacing:.03em;margin:12px 0 10px}
.notes p{margin:0;font-size:14px;color:var(--muted);line-height:1.9}
.about{padding:32px 0 36px;max-width:760px}
.about h2{margin:0 0 12px}
.about p{font-size:14px;margin:0 0 8px}
.quiet{color:var(--muted)}
.footer{display:flex;gap:16px;align-items:center;justify-content:space-between;padding:24px 0 30px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}
.footer a{padding:6px 0}
.skip-link{position:absolute;top:-100px;left:16px;padding:8px 14px;background:var(--ink);color:white;z-index:2}
.skip-link:focus{top:12px}
@media(max-width:640px){.page{padding:0 24px}.header{padding:24px 0}.intro{padding:52px 0 38px}.lead{font-size:15px}.desktop-break{display:none}.notes{grid-template-columns:1fr;gap:24px;padding:26px 0}.notes h2{margin:4px 0 7px}.notes p{max-width:36em}.about{padding:28px 0}.footer{align-items:flex-start;flex-direction:column;gap:5px;padding:22px 0}.domain{font-size:12px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}