:root{--ink:#15233b;--muted:#627089;--line:#dce5f0;--paper:#f7fafc;--card:#fff;--brand:#2864ff;--brand-dark:#1948c8;--mint:#dff8ef;--yellow:#fff0b8;--lav:#ece8ff;--shadow:0 18px 50px rgba(30,57,93,.09)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:'Noto Sans JP','DM Sans',sans-serif;line-height:1.8}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}.shell{width:min(1120px,calc(100% - 40px));margin:auto}.topbar{padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:24px}.logo{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:-.03em;font-size:18px}.logo-mark{width:30px;height:30px;background:var(--brand);border-radius:10px 10px 10px 3px;display:grid;place-items:center;color:#fff;font-size:15px}.nav{display:flex;align-items:center;gap:22px;font-size:14px;color:var(--muted)}.nav a:last-child{color:var(--ink);font-weight:700}.hero{padding:78px 0 68px;display:grid;grid-template-columns:1.06fr .94fr;gap:70px;align-items:center}.eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--brand);font-weight:800;margin-bottom:16px}.hero h1{font-size:clamp(40px,6vw,72px);line-height:1.13;letter-spacing:-.055em;margin:0 0 24px;max-width:680px}.hero p{font-size:18px;color:var(--muted);max-width:600px;margin:0 0 30px}.actions{display:flex;gap:12px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:13px;font-size:14px;font-weight:700;border:1px solid var(--line);background:#fff}.btn.primary{background:var(--brand);color:#fff;border-color:var(--brand)}.btn.primary:hover{background:var(--brand-dark);text-decoration:none}.btn:hover{text-decoration:none;transform:translateY(-1px)}.hero-art{position:relative;min-height:360px}.shape{position:absolute;border-radius:28px;box-shadow:var(--shadow)}.shape.one{width:230px;height:270px;background:var(--mint);left:40px;top:18px;transform:rotate(-7deg)}.shape.two{width:260px;height:230px;background:var(--yellow);right:20px;bottom:15px;transform:rotate(9deg)}.note{position:absolute;background:#fff;padding:22px;border-radius:20px;box-shadow:var(--shadow);width:250px;left:95px;top:70px;transform:rotate(4deg)}.note strong{display:block;font-size:20px;line-height:1.4;margin-bottom:12px}.note small{color:var(--muted)}.section{padding:64px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:26px}.section h2{font-size:32px;letter-spacing:-.04em;line-height:1.3;margin:0}.section-intro{color:var(--muted);max-width:600px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:0 8px 30px rgba(30,57,93,.04)}.card h3{margin:12px 0 10px;font-size:19px;line-height:1.45}.card p{margin:0;color:var(--muted);font-size:14px}.tag{display:inline-block;border-radius:999px;padding:5px 10px;font-size:11px;font-weight:800;background:var(--lav);color:#5a4fbb}.tag.green{background:var(--mint);color:#167d63}.tag.yellow{background:var(--yellow);color:#906b00}.number{font-family:'DM Sans';font-size:38px;font-weight:700;color:var(--brand);line-height:1}.band{background:var(--ink);color:#fff;border-radius:26px;padding:42px 46px;display:flex;justify-content:space-between;gap:30px;align-items:center}.band p{color:#cbd5e5;margin:8px 0 0;max-width:640px}.band .btn{background:#fff;border-color:#fff;color:var(--ink)}.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.article-card{display:block;background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px}.article-card:hover{transform:translateY(-2px);text-decoration:none;box-shadow:var(--shadow)}.article-card h3{font-size:22px;line-height:1.45;margin:16px 0 10px}.article-card p{color:var(--muted);margin:0}.meta{font-size:12px;color:var(--muted)}.page-hero{padding:62px 0 38px;max-width:780px}.page-hero h1{font-size:clamp(34px,5vw,58px);line-height:1.2;letter-spacing:-.045em;margin:0 0 18px}.page-hero p{color:var(--muted);font-size:17px}.prose{max-width:780px;padding-bottom:70px}.prose h2{font-size:28px;margin:42px 0 12px;line-height:1.4}.prose h3{font-size:20px;margin:28px 0 8px}.prose p,.prose li{color:#45556d}.prose ul{padding-left:22px}.notice{border-left:4px solid var(--brand);background:#edf3ff;padding:18px 20px;border-radius:0 14px 14px 0;color:#3e506b;margin:24px 0}.footer{border-top:1px solid var(--line);padding:34px 0 44px;margin-top:30px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:30px}.footer p,.footer a{font-size:13px;color:var(--muted)}.footer h4{font-size:13px;margin:0 0 10px}.footer-links{display:flex;flex-direction:column;gap:6px}.small{font-size:12px;color:var(--muted)}
@media(max-width:800px){.shell{width:min(100% - 28px,640px)}.topbar{align-items:flex-start}.nav{gap:12px;font-size:12px;flex-wrap:wrap;justify-content:flex-end}.hero{grid-template-columns:1fr;gap:20px;padding:45px 0 35px}.hero h1{font-size:46px}.hero-art{min-height:280px;transform:scale(.9);transform-origin:left top}.grid,.article-list{grid-template-columns:1fr}.section{padding:42px 0}.section-head{display:block}.section-intro{margin-top:18px}.band{padding:28px 24px;display:block}.band .btn{margin-top:20px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}
@media(max-width:480px){.nav a:nth-child(2){display:none}.hero h1{font-size:39px}.hero p{font-size:16px}.hero-art{margin-bottom:-40px}.footer-grid{grid-template-columns:1fr}}