:root{--bg:#0A0D16;--bg2:#10152A;--card:#141A33;--line:#232B4A;--fg:#EAF0FF;--muted:#98A3C7;--acc:#5CC4FF;--acc2:#3458EC;--deep:#1C185C}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Pretendard","Noto Sans KR",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--acc);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:1040px;margin:0 auto;padding:0 24px}
header{position:sticky;top:0;z-index:5;backdrop-filter:blur(14px);background:rgba(10,13,22,.72);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--fg);font-weight:700;letter-spacing:.2px}
.brand img{width:30px;height:30px;border-radius:8px}
nav a{color:var(--muted);margin-left:22px;font-size:14px}nav a:hover{color:var(--fg);text-decoration:none}
.hero{padding:92px 0 64px;background:radial-gradient(900px 420px at 20% -10%,rgba(52,88,236,.35),transparent 60%),radial-gradient(700px 380px at 90% 10%,rgba(92,196,255,.18),transparent 60%)}
.hero .wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.eyebrow{color:var(--acc);font-size:13px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;margin:0 0 14px}
h1{font-size:46px;line-height:1.18;margin:0 0 18px;letter-spacing:-.6px;font-weight:800}
h1 em{font-style:normal;background:linear-gradient(90deg,#8FD6FF,#5CC4FF 40%,#7F9BFF);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:18px;color:var(--muted);margin:0 0 30px;max-width:540px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;flex-direction:column;align-items:flex-start;gap:2px;background:var(--acc);color:#061021;font-weight:700;padding:13px 20px;border-radius:12px;line-height:1.2}
.btn:hover{text-decoration:none;filter:brightness(1.08)}
.btn small{font-weight:500;font-size:12px;opacity:.75}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid var(--line)}
.btn.disabled{background:var(--card);color:var(--muted);border:1px solid var(--line);cursor:default}
.hero-art{display:flex;justify-content:center}
.hero-art img{width:260px;height:260px;border-radius:58px;box-shadow:0 30px 80px rgba(52,88,236,.45),0 0 0 1px rgba(255,255,255,.06)}
section{padding:72px 0;border-top:1px solid var(--line)}
h2{font-size:30px;margin:0 0 10px;letter-spacing:-.3px}
.sub{color:var(--muted);margin:0 0 36px;max-width:640px}
.grid{display:grid;gap:18px}.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px}
.card h3{margin:0 0 8px;font-size:18px}.card p{margin:0;color:var(--muted);font-size:15px}
.num{display:inline-flex;width:30px;height:30px;align-items:center;justify-content:center;border-radius:50%;background:linear-gradient(135deg,var(--acc2),var(--acc));color:#fff;font-weight:700;font-size:14px;margin-bottom:14px}
.chain{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.chain span{font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:4px 10px;background:var(--bg2)}
.chain span.on{color:var(--fg);border-color:rgba(92,196,255,.5)}
.platforms .card{display:flex;flex-direction:column;gap:14px}
.platforms .card .btn{align-self:flex-start}
.tag{font-size:12px;color:var(--acc);font-weight:600;letter-spacing:.08em;text-transform:uppercase}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{cursor:pointer;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+";display:inline-block;width:22px;color:var(--acc)}
.faq details[open] summary::before{content:"–"}
.faq p{color:var(--muted);margin:10px 0 0 22px}
footer{border-top:1px solid var(--line);padding:36px 0;color:var(--muted);font-size:14px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
footer a{color:var(--muted);margin-right:18px}
.doc{max-width:760px}.doc h1{font-size:34px}.doc h2{font-size:22px;margin-top:40px}.doc p,.doc li{color:var(--muted)}.doc .meta{color:var(--muted);font-size:14px}
table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line)}th{color:var(--muted);font-weight:600}
code{background:var(--bg2);border:1px solid var(--line);padding:1px 6px;border-radius:6px;font-size:13px}
ol.steps{padding-left:20px;color:var(--muted)}ol.steps li{margin:6px 0}
@media (max-width:820px){.hero .wrap{grid-template-columns:1fr}.hero-art{order:-1}.hero-art img{width:160px;height:160px;border-radius:36px}h1{font-size:34px}.g3,.g2{grid-template-columns:1fr}nav a{margin-left:14px}}