:root{color-scheme:light;--ink:#17202a;--muted:#59636f;--line:#d9dee5;--panel:#f6f8fa;--brand:#145c52;--brand-ink:#0d3d37;--bg:#fff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Hiragino Sans",Meiryo,sans-serif;line-height:1.75}a{color:var(--brand)}.site-header{border-bottom:1px solid var(--line);background:#fff}.wrap{width:min(100% - 32px,960px);margin:0 auto}.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 0}.brand{color:var(--brand-ink);font-weight:700;letter-spacing:0;text-decoration:none}.nav-links{display:flex;gap:16px;flex-wrap:wrap;font-size:.95rem}.hero{padding:48px 0 28px}.eyebrow{color:var(--brand);font-size:.92rem;font-weight:700;margin:0 0 8px}h1{font-size:clamp(2rem,4vw,3rem);line-height:1.2;margin:0 0 14px;letter-spacing:0}h2{border-top:1px solid var(--line);font-size:1.32rem;margin:34px 0 10px;padding-top:24px}p{margin:0 0 14px}ul{margin:0 0 18px 1.3rem;padding:0}li{margin:6px 0}.lead{color:var(--muted);font-size:1.1rem;max-width:760px}.notice{background:var(--panel);border:1px solid var(--line);border-radius:8px;margin:22px 0;padding:16px 18px}.meta{color:var(--muted);font-size:.95rem}.content{padding:10px 0 56px}.site-footer{border-top:1px solid var(--line);color:var(--muted);font-size:.92rem;padding:24px 0 36px}@media(max-width:640px){.wrap{width:min(100% - 24px,960px)}.nav{align-items:flex-start;flex-direction:column;gap:10px}.hero{padding:34px 0 18px}}