:root{color-scheme:light;--bg: #fff;--surface: #fff;--soft: #f4f6f9;--text: #1a1f2b;--muted: #4a5465;--line: #dde2ea;--navy: #0f2747;--navy-dark: #0a1c35;--brand: #1d4ed8;--brand-dark: #1e40af;--accent: #0f2747;--warn: #fff8e6;--warn-line: #f0d98a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Hiragino Sans,Yu Gothic UI,Meiryo,system-ui,sans-serif;line-height:1.85}a{color:var(--brand)}.wrap{max-width:1040px;margin:0 auto;padding:0 16px}.narrow{max-width:760px;margin:0 auto;padding:0 16px}header.site{background:#fff;border-top:4px solid var(--navy);border-bottom:1px solid var(--line)}header.site .wrap{display:flex;flex-wrap:wrap;gap:8px 28px;align-items:center;padding-top:10px;padding-bottom:10px}.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy)}.logo-icon{width:38px;height:38px;flex:none}.logo-text{font-size:1.45rem;line-height:1;letter-spacing:.01em;white-space:nowrap}.logo-text .jp{font-weight:600;color:var(--navy)}.logo-text .dx{font-weight:800;color:var(--brand);font-size:1.14em;margin:0 .04em;letter-spacing:0}header.site nav{display:flex;flex-wrap:wrap;gap:4px 16px;font-size:.9rem;margin-left:auto}header.site nav a{color:#2b3445;text-decoration:none}header.site nav a:hover{color:var(--brand);text-decoration:underline}@media(max-width:600px){header.site .wrap{gap:6px 12px}.logo-icon{width:28px;height:28px}.logo-text{font-size:1.15rem}header.site nav{margin-left:0;font-size:.82rem;gap:2px 12px}}footer.site{margin-top:64px;background:var(--soft);border-top:1px solid var(--line);padding:32px 0;font-size:.85rem;color:var(--muted)}footer.site a{color:var(--text);margin-right:16px}h1{font-size:1.7rem;line-height:1.4;margin:32px 0 12px;color:var(--text)}h2{font-size:1.3rem;margin:48px 0 12px;padding-left:12px;border-left:5px solid var(--navy);line-height:1.5;color:var(--text)}h3{font-size:1.05rem;margin:24px 0 8px}.lead{color:var(--muted)}.hero{background:var(--navy);color:#fff;padding:48px 0}.hero h1{font-size:2rem;margin-top:0;color:#fff}.hero .lead{color:#dbe5f4}.hero .btn{border-color:#fff;color:#fff;background:transparent}.hero .btn.primary{background:var(--brand);border-color:var(--brand)}.hero .btn:hover{background:#ffffff1f}.hero .btn.primary:hover{background:var(--brand-dark)}.btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.btn{display:inline-block;padding:10px 18px;border-radius:6px;border:1px solid var(--brand);color:var(--brand);text-decoration:none;font-size:.92rem;font-weight:600;background:#fff}.btn:hover{background:#eef3ff}.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}.btn.primary:hover{background:var(--brand-dark)}.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}.card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:16px}a.card:hover{border-color:var(--navy);box-shadow:0 2px 8px 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var(--brand);border-radius:8px;background:var(--soft);padding:18px;margin:28px 0}.cta .pr{font-size:.72rem;color:var(--muted);border:1px solid var(--line);background:#fff;border-radius:3px;padding:0 6px;margin-right:6px}.cta h3{margin:0 0 6px}.cta p{margin:4px 0 12px;font-size:.9rem;color:var(--muted)}.notice{background:var(--warn);border:1px solid var(--warn-line);border-radius:8px;padding:12px 16px;font-size:.88rem}.crumb{font-size:.8rem;color:var(--muted);margin-top:16px}.crumb a{color:var(--muted)}article ul,article ol{padding-left:1.4em}.summary{background:var(--soft);border:1px solid var(--line);border-left:5px solid var(--navy);padding:14px 18px;border-radius:8px}.exp{background:#fff;border:1px dashed #9aa5b8;padding:12px 16px;border-radius:8px}.sources{font-size:.8rem;color:var(--muted)}@media(max-width:600px){.hero h1{font-size:1.5rem}h1{font-size:1.4rem}}.cta.compact{padding:12px 16px;margin:20px 0;display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;justify-content:space-between}.cta.compact h3{font-size:.95rem}details.faq{border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin:8px 0;background:#fff}details.faq summary{cursor:pointer;font-weight:600}details.faq p{margin:8px 0 0;font-size:.92rem}