:root{--ink:#1a1a1a;--muted:#5c5c5c;--line:#ececec;--brand:#E4002B;--bg:#fafafa}
*{box-sizing:border-box}
body{margin:0;font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand)}
.top{border-bottom:1px solid var(--line);background:#fff}
.top .in{max-width:880px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.brand{font-weight:800;letter-spacing:.04em;text-decoration:none;color:var(--ink)}
.top nav{display:flex;gap:16px;flex-wrap:wrap;font-size:14px}
.top nav a{color:var(--muted);text-decoration:none}
.top nav a:hover{color:var(--brand)}
main{max-width:880px;margin:0 auto;padding:40px 20px 64px}
h1{font-size:32px;line-height:1.2;margin:0 0 6px}
h2{font-size:20px;margin:36px 0 8px}
h3{font-size:16px;margin:20px 0 4px}
.meta{color:var(--muted);font-size:14px;margin-bottom:28px}
ul{padding-left:22px}
li{margin:4px 0}
.box{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:18px 0}
table{border-collapse:collapse;width:100%;font-size:14px}
.tw{overflow-x:auto}
th,td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:#f4f2fa}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px}
footer .in{max-width:880px;margin:0 auto;padding:20px}
.hero{padding:56px 0 24px}
.hero h1{font-size:40px}
.lead{font-size:19px;color:var(--muted);max-width:640px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:28px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}
.card b{display:block;margin-bottom:4px}
.btn{display:inline-block;background:var(--brand);color:#fff;text-decoration:none;padding:10px 18px;border-radius:10px;font-weight:600;margin-top:20px}