:root{
  --ink:#15202b; --muted:#5b6b7b; --faint:#8494a3;
  --bg:#ffffff; --panel:#f6f8fb; --line:#e3e9f0;
  --brand:#2b4fd6; --brand-dark:#1f3aa8;
  --cta:#12a150; --cta-dark:#0e823f;
  --maxw:760px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font:17px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;
}
a{color:var(--brand)}
img{max-width:100%;height:auto}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:20px}

/* header */
.site-head{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:10}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;padding-block:14px}
.logo{font-weight:800;font-size:1.15rem;letter-spacing:-.02em;text-decoration:none;color:var(--ink)}
.logo span{color:var(--brand)}
.nav a{margin-left:18px;text-decoration:none;color:var(--muted);font-size:.92rem}
.nav a:hover{color:var(--ink)}

/* disclosure banner */
.disclosure{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px 14px;color:var(--muted);font-size:.86rem;margin:22px 0}

/* article */
main{padding-block:8px 40px}
h1{font-size:2rem;line-height:1.2;letter-spacing:-.02em;text-wrap:balance;margin:26px 0 10px}
h2{font-size:1.4rem;margin:36px 0 10px;letter-spacing:-.01em}
h3{font-size:1.12rem;margin:26px 0 6px}
.lead{font-size:1.15rem;color:var(--ink)}
.meta{color:var(--faint);font-size:.86rem;margin-bottom:8px}
.answer{background:#eef3ff;border:1px solid #d5e0ff;border-left:4px solid var(--brand);border-radius:10px;padding:16px 18px;margin:22px 0}
.answer strong{color:var(--brand-dark)}
blockquote{margin:22px 0;padding:14px 18px;background:var(--panel);border-left:4px solid var(--faint);border-radius:8px;color:var(--ink)}

/* tables */
.table-wrap{overflow-x:auto;margin:20px 0}
table{border-collapse:collapse;width:100%;font-size:.94rem}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--panel);font-weight:700}
tbody tr:nth-child(even){background:#fafcff}

/* CTA */
.cta{display:inline-block;background:var(--cta);color:#fff;text-decoration:none;font-weight:700;
  padding:14px 22px;border-radius:10px;margin:8px 0;box-shadow:0 2px 0 var(--cta-dark)}
.cta:hover{background:var(--cta-dark)}
.cta-row{margin:24px 0;text-align:center}
.cta-note{display:block;color:var(--faint);font-size:.8rem;margin-top:8px}

/* faq */
.faq h3{margin-top:20px}
.faq p{margin-top:4px;color:var(--muted)}

/* home cards */
.hero{padding:40px 0 8px}
.hero h1{margin-top:0}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0 8px}
.card{border:1px solid var(--line);border-radius:12px;padding:18px;text-decoration:none;color:inherit;background:var(--bg);display:flex;flex-direction:column;gap:6px}
.card:hover{border-color:var(--brand);box-shadow:0 6px 18px -10px rgba(43,79,214,.4)}
.card .tag{font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;color:var(--brand);font-weight:700}
.card h3{margin:2px 0 0;font-size:1.05rem}
.card p{margin:0;color:var(--muted);font-size:.9rem}

/* footer */
.site-foot{border-top:1px solid var(--line);background:var(--panel);color:var(--muted);font-size:.85rem}
.site-foot .wrap{padding-block:26px;display:flex;flex-direction:column;gap:10px}
.site-foot a{color:var(--muted)}
.site-foot .links a{margin-right:16px}

@media(max-width:560px){
  h1{font-size:1.6rem}
  .grid{grid-template-columns:1fr}
}