:root{--ink:#13243b;--muted:#5d6b7e;--line:#dfe6ee;--blue:#2563eb;--bg:#f7f9fc}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,'Hiragino Kaku Gothic ProN','Noto Sans JP',sans-serif;color:var(--ink);background:var(--bg);line-height:1.9}header{background:white;border-bottom:1px solid var(--line)}.wrap{max-width:860px;margin:auto;padding:0 24px}nav{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding:18px 0}nav a{color:var(--muted);text-decoration:none;margin-right:15px;font-size:14px}nav .brand{font-weight:800;font-size:17px;color:var(--ink)}main{padding:56px 0 90px}.eyebrow{color:var(--blue);letter-spacing:.12em;font-weight:700;font-size:13px}h1{font-size:clamp(30px,5vw,44px);line-height:1.3;letter-spacing:-.03em}h2{margin-top:40px;font-size:21px}p,li{color:#41516a}section.card{background:white;border:1px solid var(--line);border-radius:18px;padding:26px 32px;margin-top:26px}a{color:#1d4ed8}.notice{background:#eff6ff;border-left:4px solid var(--blue);padding:16px 20px;border-radius:6px}.button{display:inline-block;background:var(--blue);color:white;text-decoration:none;padding:10px 20px;border-radius:9px;margin:12px 12px 0 0;font-weight:650}.button.secondary{background:white;color:var(--blue);border:1px solid #bfd0fc}footer{border-top:1px solid var(--line);background:white;padding:22px 0;font-size:13px;color:var(--muted)}footer a{margin-right:15px}ul{padding-left:1.3em}.date{font-size:13px;color:var(--muted)}@media(max-width:600px){section.card{padding:20px}main{padding:34px 0 60px}}
