:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Noto Sans JP","Yu Gothic",sans-serif;color-scheme:light;--ink:#1d2939;--muted:#596579;--line:#e7eaf0;--bg:#f8fafc;--accent:#2869bc}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);line-height:1.75}main{max-width:760px;margin:9vh auto;padding:0 22px}.card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:42px;box-shadow:0 14px 44px #12243e0a}.kicker{color:var(--accent);font-weight:700;letter-spacing:.11em;font-size:.73rem;text-transform:uppercase}h1{font-size:clamp(1.7rem,4vw,2.5rem);line-height:1.3;margin:12px 0 22px}h2{font-size:1.08rem;margin:30px 0 8px}p,li{color:var(--muted)}a{color:var(--accent);text-underline-offset:3px}footer{font-size:.84rem;color:var(--muted);margin-top:30px;padding-top:18px;border-top:1px solid var(--line)}@media(max-width:540px){main{margin:5vh auto}.card{padding:25px}}