:root{color-scheme:dark;--bg:#080d20;--panel:#101831;--text:#f7f8ff;--muted:#abb7cf;--line:rgba(137,119,255,.25);--cyan:#48dcff;--purple:#a76cff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 15% 0,rgba(32,133,180,.18),transparent 35%),radial-gradient(circle at 85% 10%,rgba(116,58,196,.17),transparent 34%),var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue","Noto Sans JP",sans-serif;letter-spacing:0}a{color:inherit;text-decoration:none}.wrap{width:min(100% - 32px,980px);margin:auto}.header{position:sticky;top:0;z-index:5;background:rgba(8,13,32,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.header-in{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:9px;font-weight:900}.brand img{width:34px;height:34px;border-radius:10px}.nav{display:flex;align-items:center;gap:20px;color:var(--muted);font-size:13px;font-weight:700}.nav a:hover{color:#fff}.cta{padding:10px 16px;border-radius:999px;background:linear-gradient(110deg,#8f4cff,#20d7f6);color:#fff}.hero{padding:88px 0 54px}.eyebrow{color:var(--cyan);font-size:12px;font-weight:900;letter-spacing:.18em}.hero h1{max-width:800px;margin:14px 0 20px;font-size:clamp(38px,6vw,68px);line-height:1.08}.hero p{max-width:720px;margin:0;color:var(--muted);font-size:16px;line-height:1.9}.section{padding:34px 0 76px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{display:block;padding:24px;border:1px solid var(--line);border-radius:8px;background:linear-gradient(145deg,rgba(16,24,49,.94),rgba(20,18,49,.82))}.card h2,.card h3{margin:0 0 10px;font-size:20px}.card p,.prose p,.prose li{color:var(--muted);line-height:1.85;font-size:14px}.card .more{display:inline-block;margin-top:12px;color:var(--cyan);font-weight:800;font-size:13px}.steps{counter-reset:step;display:grid;gap:14px}.step{position:relative;padding:24px 24px 24px 72px;border:1px solid var(--line);border-radius:8px;background:rgba(16,24,49,.84)}.step:before{counter-increment:step;content:counter(step);position:absolute;left:22px;top:23px;width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:linear-gradient(135deg,var(--purple),var(--cyan));font-weight:900}.step h2{margin:0 0 8px;font-size:18px}.step p{margin:0;color:var(--muted);line-height:1.8;font-size:14px}.prose{max-width:780px}.prose h2{margin:40px 0 12px;font-size:24px}.prose h3{margin:28px 0 10px}.prose ul{padding-left:1.2em}.notice{padding:18px;border-left:3px solid var(--cyan);background:rgba(72,220,255,.07);color:var(--muted);line-height:1.8}.footer{border-top:1px solid var(--line);padding:30px 0 calc(30px + env(safe-area-inset-bottom));color:var(--muted);font-size:12px}.footer-in{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.footer nav{display:flex;gap:16px;flex-wrap:wrap}@media(max-width:720px){.nav{display:none}.hero{padding:62px 0 40px}.grid{grid-template-columns:1fr}.header-in{min-height:60px}.step{padding:20px 18px 20px 62px}.step:before{left:17px;top:18px}}