:root{
  --bg:#05060c;--bg2:#0a0f20;--panel:#0d1428;--line:rgba(160,190,255,.12);
  --ink:#eaf1ff;--muted:#9fb0d0;--dim:#6b7aa0;
  --cyan:#7fe7ff;--blue:#6aa8ff;--violet:#a78bfa;--gold:#ffdfa0;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);overflow-x:hidden;line-height:1.6;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji",sans-serif;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(1100px 600px at 50% -10%, #12224e 0%, transparent 60%),
    radial-gradient(700px 480px at 85% 8%, rgba(167,139,250,.14) 0%, transparent 60%),
    linear-gradient(180deg,#070a16 0%, var(--bg) 55%);
  background-attachment:fixed;
}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}

/* header */
.site-head{position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);
  background:rgba(5,6,12,.72);border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;padding:12px 20px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;letter-spacing:.02em;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand svg{width:24px;height:24px;filter:drop-shadow(0 0 8px rgba(127,231,255,.5))}
.brand b{background:linear-gradient(90deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.nav{display:flex;align-items:center;gap:18px}
.nav a{color:var(--muted);font-size:14px}
.nav a:hover{color:var(--ink);text-decoration:none}
.nav .btn{color:#04121b}
@media(max-width:680px){.nav a:not(.btn){display:none}}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;cursor:pointer;
  font-weight:800;color:#04121b;text-decoration:none;padding:11px 20px;border-radius:12px;border:0;
  background:linear-gradient(100deg,var(--cyan),var(--blue) 50%,var(--violet));background-size:200% 100%;
  box-shadow:0 10px 30px rgba(127,231,255,.28);transition:transform .14s ease,box-shadow .2s ease}
.btn:hover{transform:translateY(-2px);text-decoration:none;box-shadow:0 16px 44px rgba(127,231,255,.42)}
.btn.lg{padding:17px 34px;font-size:18px;border-radius:15px}
.btn svg{width:20px;height:20px}

/* hero */
.hero{text-align:center;padding:52px 0 26px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.15em;
  text-transform:uppercase;color:var(--cyan);border:1px solid rgba(127,231,255,.3);
  background:rgba(127,231,255,.06);padding:7px 14px;border-radius:999px;margin-bottom:20px}
h1{margin:0 auto 16px;max-width:20ch;font-weight:800;line-height:1.06;letter-spacing:-.02em;font-size:clamp(30px,6.6vw,52px)}
h1 .g{background:linear-gradient(100deg,var(--cyan),#bca8ff 55%,var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin:0 auto 26px;max-width:60ch;color:var(--muted);font-size:clamp(16px,4vw,19px)}

/* sections */
section{padding:34px 0}
.h2{font-size:clamp(22px,5vw,32px);font-weight:800;letter-spacing:-.01em;margin:0 0 8px}
.h2.c{text-align:center}
.sublead{color:var(--muted);margin:0 0 24px;font-size:16px}
.sublead.c{text-align:center;max-width:52ch;margin-left:auto;margin-right:auto}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:720px){.grid,.grid.g2{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.012));
  border:1px solid var(--line);border-radius:18px;padding:22px 20px}
.card .num{font-size:13px;font-weight:800;color:var(--cyan);letter-spacing:.1em}
.card .ic{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(127,231,255,.1);border:1px solid rgba(127,231,255,.22);margin-bottom:13px}
.card .ic svg{width:23px;height:23px;color:var(--cyan)}
.card h3{margin:6px 0 6px;font-size:18px}
.card p{margin:0;color:var(--muted);font-size:15px}

.note{border:1px solid rgba(127,231,255,.28);background:rgba(127,231,255,.05);border-radius:16px;padding:18px 20px;color:var(--muted)}
.note b{color:var(--ink)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media(max-width:720px){.steps{grid-template-columns:1fr 1fr}}
.step{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px}
.step .n{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;
  color:#04121b;background:linear-gradient(100deg,var(--cyan),var(--violet));margin-bottom:10px}
.step h3{margin:0 0 4px;font-size:15px}.step p{margin:0;color:var(--muted);font-size:13.5px}

/* faq */
.faq details{border:1px solid var(--line);border-radius:14px;background:var(--panel);margin-bottom:10px;overflow:hidden}
.faq summary{cursor:pointer;padding:16px 18px;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--cyan);font-weight:800}
.faq details[open] summary::after{content:"–"}
.faq .a{padding:0 18px 16px;color:var(--muted)}

/* article */
.article{padding:34px 0}
.crumbs{font-size:13px;color:var(--dim);margin-bottom:14px}
.article h1{text-align:left;margin:0 0 14px;max-width:26ch;font-size:clamp(26px,5.6vw,40px)}
.article .meta{color:var(--dim);font-size:13px;margin-bottom:22px}
.article h2{font-size:clamp(20px,4.4vw,26px);margin:28px 0 10px}
.article h3{font-size:18px;margin:20px 0 8px}
.article p,.article li{color:#c9d6ef;font-size:16.5px}
.article ul{padding-left:22px}
.article .cta-box{margin:28px 0;text-align:center;border:1px solid var(--line);border-radius:18px;padding:26px 20px;
  background:radial-gradient(500px 180px at 50% 0%, rgba(127,231,255,.12), transparent 70%)}
.related a{color:var(--muted)}

/* final cta */
.final{text-align:center;border:1px solid var(--line);border-radius:24px;padding:44px 22px;margin-top:10px;
  background:radial-gradient(600px 220px at 50% 0%, rgba(127,231,255,.14), transparent 70%)}

/* footer */
.site-foot{border-top:1px solid var(--line);margin-top:30px;padding:30px 0 40px;color:var(--dim);font-size:13px}
.site-foot .cols{display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between}
.site-foot a{color:var(--muted)}
.site-foot .disc{max-width:70ch;margin:16px 0 0;line-height:1.5}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto}.btn:hover{transform:none}}