:root{color-scheme:light;--ink:#182b38;--muted:#536774;--accent:#087d78;--line:#dbe5e8;--paper:#fff;--bg:#f3f7f8}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.85 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:var(--accent);text-underline-offset:4px;overflow-wrap:anywhere}header{border-bottom:1px solid var(--line);background:var(--paper)}.wrap{max-width:960px;margin:auto;padding:0 28px}.top{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:84px}.brand{font-weight:750;color:var(--ink);text-decoration:none;letter-spacing:-.02em}nav{display:flex;gap:22px;font-size:14px;flex-wrap:wrap}nav a{color:var(--muted);text-decoration:none}nav a[aria-current=page]{color:var(--accent);font-weight:650}main.wrap{padding-top:64px;padding-bottom:70px}.eyebrow{color:var(--accent);font-size:13px;font-weight:750;letter-spacing:.12em}h1{font-size:clamp(30px,5vw,46px);line-height:1.3;letter-spacing:-.035em;margin:14px 0 22px}h2{font-size:23px;line-height:1.5;margin:34px 0 12px}p{margin:0 0 18px}.lead{font-size:20px;line-height:1.8;color:var(--muted);max-width:760px}.card{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:28px;margin-top:28px}.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:34px 0}.step{padding:24px;border:1px solid var(--line);border-radius:16px;background:white}.num{color:var(--accent);font-size:13px;font-weight:750}.step h2{font-size:19px;margin:12px 0 8px}.step p{font-size:15px;color:var(--muted);margin:0}.meta{font-size:14px;color:var(--muted)}.document{max-width:800px}.document h1{font-size:38px}.document ul{padding-left:24px}.document li{margin:9px 0}code{font-size:13px;padding:3px 5px;background:#e9f1f2;border-radius:5px;overflow-wrap:anywhere}footer{border-top:1px solid var(--line);padding:25px 0 34px;color:var(--muted);font-size:13px}.footer-row{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.button{display:inline-block;background:var(--accent);color:white;text-decoration:none;padding:10px 20px;border-radius:9px;font-weight:650;margin:5px 0 10px}:focus-visible{outline:3px solid #e7ac29;outline-offset:5px}@media(max-width:640px){.wrap{padding:0 20px}.top{align-items:flex-start;flex-direction:column;gap:10px;padding-top:19px;padding-bottom:19px}nav{gap:20px}main.wrap{padding-top:38px;padding-bottom:45px}.flow{grid-template-columns:1fr;gap:12px}.card{padding:22px}.lead{font-size:18px}.document h1{font-size:31px}}