:root{--bg:#0A0B14;--panel:#111530;--ink:#E8F0F5;--dim:#94A3C4;--cyan:#3FD0EE;--cyan-ink:#06222A;--line:#1E2547}
*{box-sizing:border-box}html{color-scheme:dark}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;padding:0 16px}
a{color:var(--cyan)}main{max-width:880px;margin:0 auto;padding-block:32px 64px}
header.top{display:flex;align-items:center;gap:14px;padding-block:22px}header.top img{width:48px;height:48px;border-radius:12px}
header.top .name{font-weight:700;letter-spacing:.04em;text-transform:uppercase}header.top nav{margin-left:auto;display:flex;gap:18px;flex-wrap:wrap;font-size:14px}
.hero{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;padding-block:24px 40px}
@media(min-width:720px){.hero{grid-template-columns:1.3fr 1fr}}
.hero img{width:100%;max-width:340px;border-radius:28px;justify-self:center;box-shadow:0 0 80px rgba(63,208,238,.18)}
h1{font-size:clamp(34px,6vw,54px);line-height:1.05;margin:0 0 14px;letter-spacing:-.01em}
.tag{font-size:clamp(18px,3vw,22px);color:var(--cyan);font-weight:600;margin:0 0 18px}
.lede{color:var(--dim);font-size:18px;margin:0 0 26px}
.buy{display:inline-flex;align-items:center;gap:12px;background:var(--cyan);color:var(--cyan-ink);font-weight:700;font-size:18px;border:0;border-radius:14px;padding:14px 24px;cursor:pointer;text-decoration:none}
.buy:disabled{opacity:.45;cursor:not-allowed}.buy small{font-weight:500;font-size:14px;opacity:.8}
.note{font-size:13px;color:var(--dim);margin-top:10px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;margin-block:8px 40px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:20px}
.card h3{margin:0 0 8px;font-size:17px}.card p{margin:0;color:var(--dim);font-size:15px}
.rule{border:0;border-top:1px solid var(--line);margin-block:40px}
h2{font-size:26px;margin:0 0 14px}ol,ul{padding-left:22px;color:var(--dim)}li{margin-bottom:8px}
.plain{background:var(--panel);border-left:4px solid var(--cyan);border-radius:0 14px 14px 0;padding:18px 20px;margin-block:22px}
.plain p{margin:0 0 8px}
footer{color:var(--dim);font-size:13px;padding-block:32px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:8px 22px}
article h2{margin-top:32px}article p,article li{color:var(--dim)}article strong{color:var(--ink)}
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:12px 16px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600}.faq p{color:var(--dim);margin:10px 0 0}