:root{--fg:#16181d;--muted:#6b7280;--line:#e5e7eb;--brand:#1d4ed8;--bg:#fff;--soft:#f6f8fb}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Apple SD Gothic Neo","Malgun Gothic",sans-serif;color:var(--fg);background:var(--bg);line-height:1.7}
.wrap{max-width:860px;margin:0 auto;padding:0 18px}
header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:9}
header .wrap{display:flex;align-items:center;gap:18px;height:58px;overflow-x:auto}
.brand{font-weight:800;font-size:17px;color:var(--brand);text-decoration:none;white-space:nowrap}
nav{display:flex;gap:14px;font-size:13.5px}
nav a{color:var(--muted);text-decoration:none;white-space:nowrap}
nav a:hover{color:var(--brand)}
h1{font-size:26px;line-height:1.35;margin:28px 0 10px;letter-spacing:-.02em}
h2{font-size:19px;margin:34px 0 10px;letter-spacing:-.01em}
h3{font-size:15.5px;margin:22px 0 8px}
p,li{font-size:15px}
.lead{color:#374151;font-size:15.5px}
.muted{color:var(--muted);font-size:13px}
.calc{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:18px;margin:22px 0}
.calc label{display:block;font-size:13px;font-weight:700;margin:12px 0 5px;color:#374151}
.calc input[type=number],.calc select{width:100%;padding:10px 12px;border:1px solid #d1d5db;border-radius:8px;font-size:15px;background:#fff}
.btn{margin-top:16px;width:100%;padding:12px;border:0;border-radius:8px;background:var(--brand);color:#fff;font-size:15px;font-weight:700;cursor:pointer}
.btn:hover{background:#1e40af}
.out{margin-top:16px;border-top:1px dashed #cbd5e1;padding-top:14px;display:none}
.out.show{display:block}
.row{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px solid #e8ecf3;font-size:14.5px}
.row:last-child{border:0}
.row b{font-variant-numeric:tabular-nums}
.total{font-size:18px;font-weight:800;color:var(--brand)}
table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
th,td{border:1px solid var(--line);padding:9px 10px;text-align:left}
th{background:var(--soft);font-weight:700}
td.n{text-align:right;font-variant-numeric:tabular-nums}
.note{border-left:3px solid var(--brand);background:var(--soft);padding:12px 14px;margin:18px 0;font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px;margin:16px 0}
.grid a{display:block;padding:9px 11px;border:1px solid var(--line);border-radius:8px;text-decoration:none;color:#1f2937;font-size:13.5px}
.grid a:hover{border-color:var(--brand);color:var(--brand)}
footer{border-top:1px solid var(--line);margin-top:50px;padding:22px 0 40px}
footer a{color:var(--muted);text-decoration:none;font-size:13px}
footer a:hover{color:var(--brand)}
.faq h3{margin-bottom:4px}