:root{--bg:#f6f8f4;--paper:#fff;--ink:#17231b;--muted:#667068;--line:#dce3dc;--green:#28643c;--light:#e7f2e8;--sun:#f2df72}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic",Meiryo,sans-serif;letter-spacing:.025em}a{color:inherit;text-decoration:none}.wrap{width:min(1080px,calc(100% - 36px));margin:auto}header{position:sticky;top:0;z-index:20;background:rgba(246,248,244,.96);border-bottom:1px solid var(--line)}.nav{min-height:76px;display:flex;align-items:center;justify-content:space-between}.brand{font-weight:800;font-size:20px}.brand small{display:block;font-size:10px;letter-spacing:.14em;color:var(--green)}nav{display:flex;gap:18px;font-size:12px}.hero{padding:110px 0 82px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.16em;color:var(--green)}h1,h2{font-family:Georgia,"Yu Mincho",serif;font-weight:500}h1{font-size:clamp(46px,8vw,92px);line-height:1.08;margin:18px 0 28px}h2{font-size:clamp(34px,5vw,58px);line-height:1.25;margin:0 0 28px}h3{font-size:21px}.lead{font-size:clamp(20px,3vw,30px);line-height:1.75;font-weight:650;max-width:880px}.body{color:var(--muted);line-height:2;max-width:850px}section{padding:78px 0;border-top:1px solid var(--line)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.grid.two{grid-template-columns:repeat(2,1fr)}.card{background:var(--paper);padding:28px;border:1px solid var(--line)}.card p{color:var(--muted);line-height:1.9}.card b{font-size:13px;color:var(--green)}.concept{background:var(--green);color:white}.concept .body{color:#e4eee7}.quote{font-size:clamp(27px,4.5vw,48px);line-height:1.55;font-weight:700;max-width:950px}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}.step{background:var(--paper);padding:25px}.step small{font-weight:800;color:var(--green)}.step p{color:var(--muted);line-height:1.8;font-size:14px}.note{margin-top:24px;background:var(--light);padding:22px;line-height:1.9}.cta{background:#17231b;color:white}.cta .body{color:#d5ddd7}.btn{display:inline-block;margin:18px 10px 0 0;padding:14px 19px;border:1px solid currentColor;font-weight:700;font-size:13px}.btn.primary{background:var(--sun);color:var(--ink);border-color:var(--sun)}footer{padding:42px 0;color:#758078;font-size:12px}.meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--muted)}@media(max-width:760px){.grid,.grid.two,.steps{grid-template-columns:1fr}.nav{height:auto;align-items:flex-start;flex-direction:column;padding:15px 0}.nav nav{width:100%;overflow-x:auto;white-space:nowrap;padding:8px 0}.hero{padding-top:78px}}.article{width:min(850px,calc(100% - 36px));margin:auto;padding:90px 0}.article h1{font-size:clamp(38px,6vw,68px)}.article h2{font-size:clamp(27px,4vw,40px);margin-top:60px}.article p{font-size:17px;line-height:2;color:#39443c}.article .lead{font-size:22px;color:var(--ink)}.article hr{border:0;border-top:1px solid var(--line);margin:55px 0}