:root{--bg:#F5F5F7;--surface:#FFF;--surface-soft:#F2F2F7;--text:#1D1D1F;--muted:#6E6E73;--line:#D2D2D7;--line-strong:#B8B8BF;--line-green:#06C755;--line-green-dark:#05A546;--line-green-soft:#E8F9EE;--dark:#1D1D1F;--max:960px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:76px}body{margin:0;color:var(--text);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue","Noto Sans JP",sans-serif;line-height:1.8;letter-spacing:.005em}a{color:inherit}.container{width:min(calc(100% - 48px),var(--max));margin:auto}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:12px;top:12px;z-index:2;padding:9px 13px;background:#fff;border:1px solid var(--line);border-radius:980px}header{position:sticky;top:0;z-index:5;background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(18px);border-bottom:1px solid rgba(210,210,215,.75)}.header-inner{min-height:64px;display:flex;justify-content:space-between;align-items:center;gap:20px}.brand{text-decoration:none;font-size:14px;font-weight:700}.brand span{color:var(--line-green)}.back{color:var(--line-green-dark);font-size:13px;font-weight:600;text-decoration:none}.back:hover{color:var(--line-green)}.hero{padding:78px 0 68px;background:var(--surface)}.eyebrow{display:inline-block;margin:0 0 16px;padding:4px 9px;color:var(--line-green-dark);background:var(--line-green-soft);border-radius:980px;font-size:12px;font-weight:700}h1{margin:0;font-size:clamp(34px,6vw,52px);line-height:1.2;letter-spacing:-.04em}.lead{max-width:720px;margin:19px 0 0;color:var(--muted);font-size:17px}.meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}.tag,.price{padding:5px 10px;border-radius:980px;font-size:12px;font-weight:700}.tag{color:var(--line-green-dark);background:var(--line-green-soft)}.price{color:var(--line-green-dark);background:var(--line-green-soft)}main section{padding:64px 0}.white{background:#fff}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.card{padding:26px;background:#fff;border:1px solid var(--line);border-radius:18px}.card h2{margin:0 0 12px;font-size:21px}.card p,.card li{color:var(--muted);font-size:14px}.card ul{margin:0;padding-left:20px}.features{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.feature{padding:14px;background:var(--surface-soft);border-radius:12px;font-size:13px;font-weight:700}.notice{padding:20px 22px;color:var(--muted);background:var(--surface-soft);border-left:3px solid var(--line-green);border-radius:0 12px 12px 0;font-size:13px}.research{border-top:1px solid var(--line);background:var(--surface)}.research-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.research h2{margin:0 0 14px;font-size:25px;letter-spacing:-.02em}.research .card h3{margin:0 0 8px;font-size:16px}.research .card p,.research .card li{font-size:13px}.research .card ul{margin:0;padding-left:19px}.source-note{margin:16px 0 0;color:var(--muted);font-size:11px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 18px;border:1px solid transparent;border-radius:980px;text-decoration:none;font-size:14px;font-weight:700;transition:background .16s ease,transform .16s ease}.btn:hover{transform:translateY(-1px)}.primary{color:#fff;background:var(--line-green)}.primary:hover{background:var(--line-green-dark)}.secondary{background:#fff;border-color:var(--line-strong)}.secondary:hover{background:var(--surface-soft)}footer{padding:34px 0;color:#D2D2D7;background:var(--dark);font-size:12px}@media(max-width:600px){.container{width:min(calc(100% - 28px),var(--max))}.header-inner{align-items:flex-start;padding:15px 0;flex-direction:column;gap:4px}.hero{padding:54px 0 45px}.lead{font-size:15px}.grid,.features,.research-grid{grid-template-columns:1fr}main section{padding:48px 0}.card{padding:22px}}