:root{--bg:#f7f9fb;--surface:#fff;--text:#1b2c3b;--muted:#6f7f8d;--line:#e3ebf1;--blue:#356d98;--soft:#edf4f9}
@media (prefers-color-scheme:dark){:root{--bg:#121c25;--surface:#1a2834;--text:#eaf0f4;--muted:#a3b4c1;--line:#2c3f4e;--blue:#9bc5e4;--soft:#22384a}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.75 -apple-system,BlinkMacSystemFont,'Segoe UI','Hiragino Sans','Noto Sans JP',sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-underline-offset:3px}
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px max(16px,env(safe-area-inset-left));max-width:1040px;margin:0 auto}
.logo{font-weight:700;letter-spacing:4px;font-size:20px;color:var(--text);text-decoration:none}.logo span{color:var(--blue)}
.top nav{display:flex;align-items:center;gap:14px;font-size:14px}.top nav a:not(.btn){color:var(--muted);text-decoration:none}
.btn{display:inline-flex;align-items:center;justify-content:center;background:#356d98;color:#fff;text-decoration:none;border-radius:12px;padding:12px 22px;font-weight:600;min-height:48px}
.btn.small{min-height:36px;padding:6px 14px;font-size:14px;border-radius:10px}
main{max-width:1040px;margin:0 auto;padding:0 16px 48px}
.hero{padding:56px 0 40px}
.eyebrow{font-size:11px;letter-spacing:3px;color:var(--blue);font-weight:600;margin:0 0 8px}
h1{font-size:clamp(32px,7vw,56px);line-height:1.3;letter-spacing:-1px;margin:0 0 16px}
h2{font-size:20px;margin:0 0 8px}
.lead{font-size:18px;color:var(--muted);max-width:640px;margin:0 0 24px}
.cta{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.note{font-size:13px;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:16px 0 40px}
.grid article,.safety,.en,.doc section{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px}
.grid p{color:var(--muted);margin:0}
.safety ul{margin:8px 0 0;padding-left:20px}.safety li{margin:6px 0}
.en{margin-top:16px}
.doc{max-width:760px}.doc section{margin:16px 0}
details{border-top:1px solid var(--line);padding:12px 0}details:first-of-type{border-top:0}
summary{cursor:pointer;font-weight:600}details p{color:var(--muted);margin:8px 0 0}
.warn{background:var(--soft);border-radius:12px;padding:12px 14px}
footer{border-top:1px solid var(--line);padding:24px 16px 40px;text-align:center;font-size:13px;color:var(--muted)}
footer nav{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 18px;margin-bottom:10px}
footer a{color:var(--muted)}
@media (max-width:520px){.top nav a[lang=en]{display:none}.hero{padding:32px 0 24px}}