:root{color-scheme:light;--paper:#f8f6ef;--ink:#203d34;--muted:#59675e;--green:#1d6455;--line:#d7dfd4;--soft:#edf0e6}
*{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:1.85}
a{color:inherit;text-underline-offset:.25em}
a:focus-visible,summary:focus-visible{outline:3px solid #b8672b;outline-offset:5px}
.wrap{width:min(1080px,calc(100% - 48px));margin-inline:auto}
.skip{position:absolute;top:8px;left:8px;transform:translateY(-160%);background:white;padding:8px;z-index:2}
.skip:focus{transform:none}
.site-header{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-block:25px;border-bottom:1px solid var(--line);font-size:.8rem}
.brand{font-size:1rem;font-weight:750;text-decoration:none}
.hero{display:grid;grid-template-columns:1.2fr 1fr;align-items:center;gap:60px;padding-block:76px 52px}
.eyebrow{font-size:.7rem;font-weight:750;letter-spacing:.13em;color:var(--green);margin:0 0 14px}
h1{font-size:clamp(2.6rem,5.6vw,4.5rem);line-height:1.35;letter-spacing:-.04em;margin:0 0 24px}
h1 span{color:var(--green)}
.lead{font-size:1.02rem;margin-bottom:26px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:36px;background:var(--green);color:#fff;border-radius:9px;min-height:54px;padding:13px 28px;font-weight:750;text-decoration:none}
.button:hover{background:#164e42}
.hint{font-size:.78rem;color:var(--muted);margin:10px 0 16px}
.sub-link{font-size:.88rem}
.visual{min-width:0;border:1px solid var(--line);background:#fdfcf8;border-radius:24px;padding:26px;box-shadow:0 18px 50px #203d340a}
.visual-top{display:flex;justify-content:space-between;font-size:.76rem;color:var(--muted)}
.visual-top span:first-child{font-size:1.3rem;font-weight:750;color:var(--green)}
.photo-stack{height:230px;position:relative;margin:10px auto;width:min(100%,290px)}
.photo{position:absolute;width:77%;height:157px;border:8px solid #fff;border-radius:7px;box-shadow:0 6px 16px #203d3414}
.back{top:32px;left:8%;background:#d5ded1;transform:rotate(-10deg)}
.front{top:46px;left:16%;background:#e7eddd;transform:rotate(7deg);overflow:hidden}
.sun{position:absolute;width:38px;height:38px;border-radius:50%;background:#d9ba6b;top:18px;right:28px}
.hill{position:absolute;width:200px;height:160px;border-radius:50% 50% 0 0;background:#7c9c81;bottom:-97px;left:-17px;transform:rotate(-20deg)}
.visual-caption{text-align:center;font-weight:650;margin:0}
.visual-note{text-align:center;font-size:.72rem;color:var(--muted);margin:5px 0 0}
.features{display:flex;justify-content:center;gap:32px;list-style:none;padding:19px 0;margin:0;border-block:1px solid var(--line);font-size:.88rem}
.section{padding-block:54px;border-bottom:1px solid var(--line)}
h2{font-size:clamp(1.4rem,3vw,2rem);line-height:1.5;margin:0 0 26px;letter-spacing:-.025em}
h3{font-size:1rem;line-height:1.6;margin:0 0 10px}
p{overflow-wrap:anywhere}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px}
.cards p,.steps p{font-size:.9rem;color:var(--muted);margin:0}
.steps{list-style:none;counter-reset:step;margin:0;padding:0}
.steps li{counter-increment:step;display:flex;gap:24px;padding-block:20px}
.steps li:before{content:"0" counter(step);font-size:1.3rem;color:var(--green);font-weight:700}
.privacy{background:var(--soft);padding:34px;border-radius:16px;border:0;margin-top:50px}
.privacy p:not(.eyebrow){font-size:.9rem}
.privacy h2{margin-bottom:16px}
details{border-top:1px solid var(--line);padding:18px 0}
summary{cursor:pointer;font-weight:650;padding:6px 0}
details p{font-size:.9rem;max-width:75ch;color:var(--muted)}
.final-cta{text-align:center;padding-block:60px}
.ad-slot{margin:20px auto 40px;max-width:100%;text-align:center}
.ad-slot-label{font-size:11px;color:var(--muted);letter-spacing:.1em;margin:0 0 8px}
.ad-slot-box{min-height:250px}
.site-footer{border-top:1px solid var(--line);padding-block:28px;display:flex;justify-content:space-between;gap:20px;font-size:.75rem;color:var(--muted)}
.site-footer nav{display:flex;flex-wrap:wrap;gap:18px}
@media(max-width:700px){.wrap{width:calc(100% - 32px)}
.site-header{font-size:.7rem;gap:10px}
.brand{font-size:.85rem}
.hero{grid-template-columns:1fr;gap:34px;padding-block:42px 32px}
.visual{max-width:380px;width:100%;margin:auto;padding:20px}
.photo-stack{height:205px}
.features{flex-wrap:wrap;gap:8px 20px;font-size:.78rem;padding-block:16px}
.cards{grid-template-columns:1fr;gap:25px}
.section{padding-block:36px}
.privacy{padding:24px;margin-top:36px}
.steps li{gap:16px}
.final-cta{padding-block:40px}
.site-footer{flex-direction:column}
.button{max-width:100%}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}
}