:root{--ink:#1d2433;--muted:#5b6475;--line:#e3e6ec;--brand:#0f766e;--bg:#f7f8fa}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
header{background:#fff;border-bottom:1px solid var(--line)}
.wrap{max-width:880px;margin:0 auto;padding:0 20px}
.top{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;font-size:20px;color:var(--brand);text-decoration:none;letter-spacing:.5px}
nav a{color:var(--muted);text-decoration:none;margin-left:18px;font-size:15px}nav a:hover{color:var(--ink)}
main{padding:40px 0 56px}h1{font-size:30px;margin:0 0 8px}h2{font-size:20px;margin:32px 0 10px}
.lead{color:var(--muted);font-size:17px;margin:0 0 24px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin:16px 0}
table{border-collapse:collapse;width:100%}td{padding:8px 0;border-bottom:1px solid var(--line);vertical-align:top}td:first-child{color:var(--muted);width:38%}
ul{padding-left:20px}footer{border-top:1px solid var(--line);background:#fff;color:var(--muted);font-size:14px}footer .wrap{padding:20px}
@media (max-width:560px){h1{font-size:24px}nav a{margin-left:12px}td:first-child{width:45%}}