:root{color-scheme:light;--navy:#102d4f;--ink:#20344c;--muted:#5c6f83;--blue:#1c6bb0;--line:#dce5ee;--bg:#f6f8fc;--white:#fff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Noto Sans JP",Meiryo,sans-serif;color:var(--ink);line-height:1.9}header{background:#fff;border-bottom:1px solid var(--line)}.wrap{width:min(960px,calc(100% - 40px));margin:auto}.top{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 0;flex-wrap:wrap}.brand{font-size:19px;font-weight:800;color:var(--navy);text-decoration:none;letter-spacing:.02em}nav{display:flex;gap:16px;flex-wrap:wrap}nav a,footer a{color:var(--blue);text-decoration:none}nav a:hover,footer a:hover{text-decoration:underline}main{padding:55px 0 72px}.eyebrow{font-size:.82rem;color:var(--blue);font-weight:800;letter-spacing:.14em}.hero h1{font-size:clamp(30px,5vw,48px);line-height:1.35;margin:12px 0 18px;color:var(--navy)}.lead{font-size:1.08rem;max-width:750px;color:var(--muted)}.pill{display:inline-block;background:#edf4fc;color:#115a97;border-radius:99px;padding:5px 13px;font-size:.84rem;font-weight:700}.hero{padding:8px 0 28px}.card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:26px 30px;margin:20px 0;box-shadow:0 5px 19px rgba(15,40,80,.03)}.card h2{margin:0 0 13px;color:var(--navy);font-size:1.4rem}.card h3{color:var(--navy);margin-top:22px;font-size:1.05rem}ul,ol{padding-left:1.4em}li{margin:.3em 0}.split{display:grid;grid-template-columns:1fr 1fr;gap:18px}@media(max-width:680px){.split{grid-template-columns:1fr}.card{padding:22px 20px}}a{color:var(--blue)}.fine{font-size:.9rem;color:var(--muted)}.notice{border-left:4px solid var(--blue);padding:13px 18px;background:#edf5fe;color:#254766;border-radius:5px}footer{border-top:1px solid var(--line);background:white;padding:25px 0;color:var(--muted);font-size:.88rem}table{border-collapse:collapse;width:100%}th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}th{background:#eff5fb;width:26%}