:root{color-scheme:light;--navy:#142c3c;--teal:#087d78;--ink:#24333a;--muted:#65747a;--paper:#f4f7f5}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,"Noto Sans JP",sans-serif;line-height:1.8}.wrap{max-width:820px;margin:auto;padding:28px 22px 72px}header{padding:56px 34px;border-radius:24px;background:var(--navy);color:#fff}.eyebrow{font-size:.85rem;letter-spacing:.08em;color:#b6d6d2}h1{font-size:clamp(2rem,8vw,3.8rem);line-height:1.35;margin:.4em 0}h2{font-size:1.35rem;color:var(--navy)}.lead{font-size:1.05rem;max-width:600px;color:#e0ecea}.button{display:inline-block;margin-top:20px;padding:12px 20px;border-radius:999px;background:#13a399;color:white;font-weight:700;text-decoration:none}section{margin:24px 0;padding:28px 32px;background:white;border:1px solid #e3e9e6;border-radius:20px}.note{padding:14px 18px;border-left:4px solid #deaa45;background:#fff9eb}footer{padding:20px;color:var(--muted);font-size:.9rem}@media(max-width:600px){header{padding:38px 23px}section{padding:22px}}