:root{--ink:#090909;--muted:#6d6d72;--line:#dedee2;--surface:#f2f3f7;--blue:#1769ee;--max:1160px;color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic UI","Yu Gothic",sans-serif;background:#fff;color:var(--ink)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0}a{color:inherit;text-decoration:none}header{height:80px;max-width:var(--max);margin:auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.wordmark{font-weight:900;letter-spacing:.25em;font-size:14px}nav{display:flex;gap:28px;font-size:13px;font-weight:700}main{overflow:hidden}.hero{max-width:var(--max);min-height:720px;margin:auto;padding:80px 28px 0;display:grid;grid-template-columns:1.1fr .9fr;gap:68px;align-items:center}.eyebrow{font:800 12px/1.4 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.18em;color:var(--muted)}h1,h2,h3,p{margin-top:0}.hero h1{font-size:clamp(48px,7vw,86px);line-height:1.03;letter-spacing:-.055em;margin:22px 0 30px}.hero h1 em{font-style:normal;color:var(--blue)}.lead{font-size:18px;line-height:1.95;color:#3c3c40;max-width:610px}.hero-actions{display:flex;align-items:center;gap:18px;margin-top:34px;font-size:13px;font-weight:800}.status{background:var(--ink);color:#fff;padding:12px 16px;border-radius:999px}.hero-actions a{border-bottom:1px solid var(--ink);padding:10px 0}.phone-shell{width:min(360px,100%);height:620px;margin:auto;overflow:hidden;border:10px solid #0a0a0a;border-radius:54px;box-shadow:0 34px 90px #1113;background:#fff}.phone-shell img{display:block;width:100%;height:auto}.concept,.guides,.principle,.notice{max-width:var(--max);margin:0 auto;padding:110px 28px}.concept>div:first-child{display:grid;grid-template-columns:.55fr 1fr;gap:60px;align-items:end}.concept h2,.guides h2,.principle h2,.notice h2{font-size:clamp(34px,5vw,60px);letter-spacing:-.045em;line-height:1.18}.concept-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:58px}.concept-grid article{border:1px solid var(--line);border-radius:26px;padding:30px;min-height:270px}.concept-grid span,.guide-card>span{color:var(--blue);font:800 12px ui-monospace,SFMono-Regular,Menlo,monospace}.concept-grid h3{font-size:22px;margin:50px 0 16px}.concept-grid p,.section-heading>p,.notice p{color:var(--muted);line-height:1.8}.principle{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;background:#fff}.shape-card{min-height:360px;background:var(--surface);border-radius:34px;padding:44px;display:flex;align-items:center;gap:42px}.shape-mark{font-size:84px;font-weight:300;color:var(--blue)}.shape-card div{display:grid;gap:12px}.shape-card small{font:800 11px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.14em;color:var(--muted)}.shape-card strong{font-size:25px}.shape-card p,.principle>div>p:last-child{line-height:1.8;color:var(--muted)}.guides{background:#fafafa;max-width:none}.guides>*{max-width:var(--max);margin-left:auto;margin-right:auto}.section-heading{display:grid;grid-template-columns:1.2fr .8fr;gap:70px;align-items:end}.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:56px}.guide-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:26px;min-height:230px;display:flex;flex-direction:column}.guide-card h3{font-size:21px;line-height:1.45;margin:22px 0 12px}.guide-card p{font-size:14px;color:var(--muted);line-height:1.7;flex:1}.guide-card b{font-size:13px}.guide-card:hover{border-color:var(--blue);transform:translateY(-2px)}.notice{margin-top:100px;margin-bottom:100px;border-radius:32px;background:var(--ink);color:#fff}.notice h2{font-size:36px}.notice p{max-width:780px;color:#bbb}.page-head{max-width:900px;margin:0 auto;padding:120px 28px 70px}.page-head h1,.article h1{font-size:clamp(42px,7vw,72px);line-height:1.15;letter-spacing:-.05em;margin:22px 0}.page-head>p:last-child{font-size:18px;line-height:1.8;color:var(--muted)}.prose,.article{max-width:800px;margin:0 auto;padding:0 28px 120px}.prose h2,.article section h2{font-size:25px;margin:56px 0 15px}.prose p,.article section p{font-size:16px;line-height:2;color:#343438}.article{padding-top:100px}.back{display:inline-block;margin-bottom:70px;color:var(--muted);font-size:13px;font-weight:700}.article-lead{font-size:20px;line-height:1.9;color:#343438}.article-meta{display:flex;gap:20px;padding:22px 0 34px;margin-top:34px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:12px}.article aside{margin-top:64px;border-radius:22px;background:var(--surface);padding:28px}.article aside p{margin:10px 0 0;line-height:1.8;color:var(--muted)}footer{max-width:var(--max);margin:auto;border-top:1px solid var(--line);padding:58px 28px 40px;display:grid;grid-template-columns:1fr 1fr;gap:30px}footer strong{letter-spacing:.2em}footer p,footer small{color:var(--muted);font-size:12px;line-height:1.7}.footer-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:20px;font-size:12px;font-weight:700}footer small{grid-column:1/-1}@media(max-width:780px){header{height:66px;padding:0 18px}nav{gap:14px}nav a:nth-child(-n+2){display:none}.hero{grid-template-columns:1fr;padding:66px 20px 0;gap:45px}.hero h1{font-size:52px}.phone-shell{height:540px}.concept,.guides,.principle,.notice{padding:82px 20px}.concept>div:first-child,.section-heading,.principle{grid-template-columns:1fr;gap:28px}.concept-grid,.guide-grid{grid-template-columns:1fr}.concept-grid article{min-height:220px}.shape-card{min-height:280px;padding:28px;gap:20px}.shape-mark{font-size:60px}.notice{margin:60px 14px}.page-head,.article{padding-top:80px}.footer-links{justify-content:flex-start}footer{grid-template-columns:1fr}}