:root{color-scheme:light dark;--bg:#f6f1e7;--fg:#1f3639;--muted:#54686a;--accent:#ac441f;--card:#fffdf8;--line:#dcded4;--sea:#174f51}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.85 -apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif;-webkit-font-smoothing:antialiased}
main{max-width:760px;margin:auto;padding:36px 24px 64px}
header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:28px}
header a{color:var(--fg);text-decoration:none;font-weight:750;letter-spacing:.05em}
header .small-link{font-size:.85rem;font-weight:500;color:var(--muted)}
h1{font-size:clamp(1.8rem,5vw,2.8rem);line-height:1.45;letter-spacing:.01em;margin:.6em 0 .3em}
h2{font-size:1.15rem;margin:2em 0 .5em;padding-top:1.2em;border-top:1px solid var(--line)}
p,li{overflow-wrap:anywhere}
.muted{color:var(--muted);font-size:.9rem}
a{color:var(--accent);text-underline-offset:4px}
a:focus-visible{outline:3px solid var(--accent);outline-offset:5px;border-radius:2px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px 24px;margin:20px 0}
nav{display:flex;gap:12px 24px;flex-wrap:wrap;margin-top:44px;padding-top:24px;border-top:1px solid var(--line);font-size:.85rem}
.landing{max-width:1100px}
.eyebrow{font-size:.78rem;font-weight:650;letter-spacing:.14em;color:var(--sea)}
.hero{display:grid;grid-template-columns:1fr 1.12fr;align-items:center;gap:40px;padding:20px 0 28px}
.hero p{max-width:30em}
.hero figure{margin:0}
.hero img{display:block;width:100%;height:auto;border-radius:24px;box-shadow:0 20px 48px #174f5117}
figcaption{font-size:.75rem;color:var(--muted);margin-top:10px;text-align:right}
.facts{display:flex;flex-wrap:wrap;gap:12px 24px;padding:12px 0;font-size:.85rem;color:var(--muted)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding-top:20px}
.steps h2{margin:0;border:0;padding:0}
.steps p{font-size:.92rem;color:var(--muted)}
.plans{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.plans .card{margin:0}
.plans h3{margin:0;font-size:1rem}
.plans p{margin:.5em 0;font-size:.9rem}
@media(max-width:700px){main{padding:24px 20px 48px}.hero{grid-template-columns:1fr;gap:20px;padding-top:0}.hero h1{font-size:2.1rem}.hero p{max-width:none}.steps{grid-template-columns:1fr;gap:8px}.plans{grid-template-columns:1fr}header{padding-bottom:20px}.card{padding:16px 20px}}
@media(prefers-color-scheme:dark){:root{--bg:#101e20;--fg:#e5eeee;--muted:#a9bbbc;--accent:#ffa47d;--card:#182b2d;--line:#31484a;--sea:#8ecac4}}