:root{--ink:#173529;--muted:#536b60;--green:#147a4b;--line:#dbe9e0;--soft:#edf8f0}*{box-sizing:border-box}body{margin:0;background:#f7fbf8;color:var(--ink);font:17px/1.85 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}a{color:#12673e;text-underline-offset:4px}a:hover{color:#093e26}a:focus-visible{outline:3px solid #147a4b;outline-offset:5px}header{border-bottom:1px solid var(--line);background:white}.nav{max-width:1080px;margin:auto;padding:18px 24px;display:flex;gap:24px;align-items:center;flex-wrap:wrap}.brand{font-size:21px;font-weight:800;margin-right:auto;text-decoration:none}.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:8px;background:white;z-index:2;padding:8px}main{max-width:860px;margin:auto;padding:36px 24px 64px}h1{font-size:clamp(28px,4vw,40px);line-height:1.35;letter-spacing:-.5px}h2{font-size:24px;line-height:1.5;margin-top:38px}h3{font-size:19px}p,li{overflow-wrap:anywhere}li{margin-bottom:12px}ol,ul{padding-left:26px}.crumb,.meta{font-size:14px;color:var(--muted)}.intro{font-size:19px;color:var(--muted)}.note{padding:18px 22px;border-left:4px solid var(--green);background:var(--soft);border-radius:0 12px 12px 0}.cards{display:grid;grid-template-columns:1fr 1fr;gap:18px}.card{background:white;border:1px solid var(--line);padding:22px;border-radius:14px}.card h2{font-size:22px;margin:0}.card p{font-size:16px;color:var(--muted)}.cta{display:inline-block;background:var(--green);color:white;padding:10px 22px;border-radius:9px;text-decoration:none;font-weight:700}.cta:hover{color:white;background:#0d5d38}figure{margin:28px 0}img{max-width:100%;height:auto;border:1px solid var(--line);border-radius:12px;display:block}figcaption{font-size:14px;color:var(--muted);margin-top:10px}code{font-size:.95em;background:#e8f0eb;padding:2px 6px;border-radius:4px}footer{border-top:1px solid var(--line);padding:24px;text-align:center;color:var(--muted);font-size:13px}footer a{margin:0 8px}.related{border-top:1px solid var(--line);margin-top:40px;padding-top:20px}@media(max-width:600px){.cards{grid-template-columns:1fr}.nav{padding:14px 18px;gap:16px;font-size:15px}main{padding:24px 18px 44px}h2{font-size:22px}.note{padding:14px 16px}}
