:root{--ink:#173b35;--muted:#52645e;--paper:#f6f5ef;--line:#d5ded5;--white:#fff;--accent:#dfe8c7}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif}a{color:inherit;text-underline-offset:5px}a:hover{color:#376c53}a:focus-visible,button:focus-visible{outline:3px solid #a56a28;outline-offset:5px}.wrap{max-width:1120px;margin:auto;padding:0 40px}header{border-bottom:1px solid var(--line)}header .wrap{min-height:100px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:13px;text-decoration:none;font-size:14px;font-weight:650;letter-spacing:.04em}.mark{display:grid;place-items:center;width:37px;height:37px;border:1px solid var(--ink);border-radius:50%;font:24px Georgia,serif}nav{display:flex;gap:24px;align-items:center;font-size:14px}.languages{display:flex;gap:2px;padding-left:12px;border-left:1px solid var(--line)}button{font:inherit;cursor:pointer;border:0;background:transparent;color:var(--muted);padding:4px 8px;border-radius:3px}button[aria-pressed=true]{background:var(--ink);color:white}.review{padding:9px 20px;text-align:center;background:#e9eddc;color:#435545;font-size:12px;letter-spacing:.04em}.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:12px;font-weight:650}.hero{display:grid;grid-template-columns:1.5fr 1fr;gap:75px;padding:82px 0 72px;border-bottom:1px solid var(--line)}h1,h2,h3,p{margin-top:0}h1{font-family:Georgia,"Noto Serif SC",serif;font-size:clamp(38px,4.7vw,61px);font-weight:400;line-height:1.2;letter-spacing:-.025em;margin:18px 0 24px;max-width:700px}h2{font-size:26px;font-weight:500;line-height:1.4;margin-bottom:18px}h3{font-size:17px;font-weight:650}.lead{font-size:18px;color:var(--muted);max-width:620px}.button{display:inline-block;background:var(--ink);color:white;text-decoration:none;padding:12px 22px;font-size:14px;margin-top:12px}.button:hover{color:white;background:#29574b}.facts{margin:24px 0 0}.fact{display:grid;grid-template-columns:88px 1fr;gap:10px;padding:16px 0;border-top:1px solid var(--line);font-size:14px}.fact dt{color:var(--muted)}.fact dd{margin:0}.section{padding:45px 0;border-bottom:1px solid var(--line)}.two{display:grid;grid-template-columns:1fr 1fr;gap:65px}.scope{display:block;font:13px/1.7 ui-monospace,Consolas,monospace;overflow-wrap:anywhere;margin-bottom:10px;color:#376c53}.section p,.policy p,.policy li{color:var(--muted)}.quiet{font-size:14px}.number{display:block;font:28px Georgia,serif;color:#708273;margin-bottom:14px}.policy-head{padding:58px 0 34px;border-bottom:1px solid var(--line)}.policy-head h1{font-size:48px;margin:12px 0 18px}.policy-layout{display:grid;grid-template-columns:200px minmax(0,1fr);gap:70px;padding:45px 0 72px}.toc{align-self:start;position:sticky;top:24px;display:grid;gap:12px;font-size:14px}.toc a{text-decoration:none}.policy section{padding-bottom:24px;margin-bottom:32px;border-bottom:1px solid var(--line);scroll-margin-top:30px}.policy ul{padding-left:22px}.policy code{font-size:13px;overflow-wrap:anywhere}.callout{padding:20px 24px;background:var(--accent);color:var(--ink);margin:20px 0}.callout p{margin:0;color:var(--ink)}footer{padding:32px 0 45px}footer .wrap{display:flex;justify-content:space-between;gap:26px;font-size:13px;color:var(--muted)}footer p{margin:0}.lang-en{display:none}html[lang=en] .lang-en{display:revert}html[lang=en] .lang-zh{display:none}@media(max-width:750px){.wrap{padding:0 22px}header .wrap{padding-top:20px;padding-bottom:20px;flex-wrap:wrap;gap:15px}nav{gap:18px;flex-wrap:wrap}.brand{font-size:12px}.hero{grid-template-columns:1fr;gap:10px;padding:45px 0}.hero h1{font-size:43px}.two{grid-template-columns:1fr;gap:25px}.policy-layout{grid-template-columns:1fr;gap:30px}.toc{position:static;display:flex;flex-wrap:wrap;gap:10px 20px;padding-bottom:20px;border-bottom:1px solid var(--line)}.policy-head h1{font-size:40px}footer .wrap{flex-direction:column;gap:14px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}