:root{color-scheme:light;--ink:#17242b;--muted:#52636c;--line:#dce4e6;--paper:#fff;--wash:#f4f7f7;--accent:#165b53;--tint:#e9f3ef}
*{box-sizing:border-box}body{margin:0;background:var(--wash);color:var(--ink);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
a{color:var(--accent);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid #adccbc;outline-offset:4px;border-radius:2px}
.shell{max-width:1000px;margin:0 auto;padding:0 28px}.site-header{background:var(--paper);border-bottom:1px solid var(--line)}.header-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:22px;padding-bottom:22px}.brand{color:var(--ink);font-size:19px;font-weight:700;text-decoration:none}.brand small{display:block;color:var(--muted);font-size:12px;font-weight:400;letter-spacing:.03em}nav{display:flex;gap:22px;flex-wrap:wrap}nav a{text-decoration:none;font-size:14px}nav a[aria-current=page]{font-weight:700;text-decoration:underline}
main{padding-top:34px;padding-bottom:56px}.eyebrow{margin:0 0 10px;color:var(--accent);font-size:13px;font-weight:600;letter-spacing:.05em}.hero{padding:4px 0 28px;max-width:760px}h1{font-size:38px;line-height:1.25;letter-spacing:-.03em;margin:0 0 20px}h2{font-size:23px;line-height:1.4;margin:0 0 15px}h3{font-size:17px;margin:0 0 8px}.lead{font-size:19px;color:var(--muted);margin:0}.small{font-size:14px;color:var(--muted)}.meta{margin:12px 0 0;color:var(--muted);font-size:13px}.card{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:27px 30px;margin-top:20px}.card p:first-child{margin-top:0}.card p:last-child{margin-bottom:0}.columns{display:grid;grid-template-columns:1fr 1fr;gap:20px}.columns .card{margin-top:0}.callout{padding:18px 21px;border-left:4px solid var(--accent);background:var(--tint);margin:22px 0}p{margin:0 0 16px}ul,ol{margin:0 0 16px;padding-left:25px}li{padding-left:4px;margin-bottom:8px}code{font-size:.87em;overflow-wrap:anywhere;background:#edf1f1;padding:2px 5px;border-radius:3px}.flow{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:18px 0 4px}.flow span{background:var(--tint);color:#234f48;padding:9px 13px;border-radius:6px;font-size:14px}.flow b{color:var(--muted);font-size:18px}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:14px;text-align:left}th,td{vertical-align:top;padding:13px 12px;border-bottom:1px solid var(--line)}th{color:var(--muted);font-weight:600;background:#f8fafa}tr:last-child td{border-bottom:0}.site-footer{border-top:1px solid var(--line);padding:25px 0 32px;color:var(--muted);font-size:13px}.site-footer p{margin-bottom:8px}.footer-links{display:flex;gap:20px;flex-wrap:wrap}
@media(max-width:680px){.shell{padding-left:20px;padding-right:20px}.header-row{align-items:flex-start;flex-direction:column;gap:16px}nav{gap:19px}main{padding-top:24px}h1{font-size:30px}.lead{font-size:17px}.card{padding:22px 21px}.columns{grid-template-columns:1fr;gap:16px}.hero{padding-bottom:20px}th,td{padding:11px 9px}}