:root{--brand:#0a99ff;--bg:#f5f6f8;--surface:#ffffff;--text:#17181a;--text-secondary:#6e7178;--border:rgba(0,0,0,0.08);--radius:20px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased}a{color:var(--brand);text-decoration:none}img{max-width:100%;height:auto;display:block}.container{max-width:1040px;margin:0 auto;padding:0 24px}.site-header{padding:20px 0}.site-header .container{justify-content:space-between}.brand,.site-header .container{display:flex;align-items:center}.brand{gap:10px;color:var(--text);font-weight:700;font-size:20px;letter-spacing:.01em}.hero{text-align:center;padding:72px 0 56px}.hero h1{font-size:clamp(30px,6vw,52px);font-weight:800;line-height:1.35;letter-spacing:.02em}.hero .lead{margin:20px auto 0;max-width:560px;color:var(--text-secondary);font-size:clamp(15px,2.5vw,17px)}.hero .cta{margin-top:36px;display:flex;justify-content:center}.appstore-button{display:inline-flex;align-items:center;gap:10px;background:var(--text);color:#fff;font-weight:700;font-size:16px;padding:14px 28px;border-radius:999px;transition:opacity .15s ease}.appstore-button:hover{opacity:.8}.hero .cta-note{margin-top:12px;font-size:12px;color:var(--text-secondary)}.screens{padding:24px 0 64px}.screens-track{display:flex;gap:20px;overflow-x:auto;padding:8px 24px 20px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}.screens-track::-webkit-scrollbar{height:6px}.screens-track::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.screens-track>figure{flex:0 0 auto;width:min(320px,78vw);scroll-snap-align:center;border-radius:var(--radius);overflow:hidden;box-shadow:0 4px 24px rgba(0,0,0,.07);background:var(--surface)}.features{padding:24px 0 72px}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:20px;gap:20px}.feature-card{background:var(--surface);border-radius:var(--radius);padding:28px 24px;box-shadow:0 2px 12px rgba(0,0,0,.04)}.feature-card .dot{width:12px;height:12px;border-radius:50%;background:var(--brand);margin-bottom:16px}.feature-card h3{font-size:18px;font-weight:700;line-height:1.5}.feature-card p{margin-top:8px}.feature-card p,.site-footer{font-size:14px;color:var(--text-secondary)}.site-footer{border-top:1px solid var(--border);padding:40px 0 56px}.site-footer .container{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}.footer-links{display:flex;flex-wrap:wrap;gap:20px}.footer-links a{color:var(--text-secondary)}.footer-links a:hover{color:var(--text)}.legal-page{max-width:720px;margin:0 auto;padding:40px 24px 96px}.legal-page .back-link{font-size:14px}.prose{margin-top:24px;background:var(--surface);border-radius:var(--radius);padding:clamp(24px,5vw,48px);box-shadow:0 2px 12px rgba(0,0,0,.04)}.prose h1{font-size:clamp(24px,4.5vw,32px);line-height:1.4;margin-bottom:8px}.prose h2{font-size:20px;margin:40px 0 12px;line-height:1.5}.prose h3{font-size:17px;margin:28px 0 8px}.prose p{margin:12px 0}.prose ol,.prose ul{padding-left:1.6em;margin:12px 0}.prose li{margin:6px 0}.prose table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px}.prose td,.prose th{border:1px solid var(--border);padding:8px 12px;text-align:left}.prose hr{border:none;border-top:1px solid var(--border);margin:32px 0}