:root{
  --bg:#080b14;
  --bg-soft:#0d1220;
  --line:rgba(255,255,255,.09);
  --txt:#e9eefb;
  --muted:#8d99b2;
  --c1:#38e0c8;
  --c2:#6c8cff;
  --c3:#b06bff;
  --radius:18px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--txt);
  font-family:"Segoe UI",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.78;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.015em;line-height:1.25}
p{margin:0}
.wrap{width:min(1160px,92vw);margin:0 auto}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:60;
  background:rgba(8,11,20,.74);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.head-inner{display:flex;align-items:center;gap:18px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;flex-shrink:0}
.logo{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-size:15px;font-weight:900;color:#04121a;
  background:linear-gradient(135deg,var(--c1),var(--c2));
  box-shadow:0 6px 18px -8px rgba(56,224,200,.9);
}
.brand-txt{font-size:16.5px;letter-spacing:.01em}
.brand-txt em{font-style:normal;font-weight:600;font-size:12.5px;color:var(--muted);margin-left:3px}
.nav{display:flex;gap:2px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{
  padding:8px 13px;border-radius:10px;font-size:14.5px;color:var(--muted);
  white-space:nowrap;transition:color .2s,background .2s;
}
.nav a:hover{color:var(--txt);background:rgba(255,255,255,.06)}
.nav a.active{color:var(--txt);background:rgba(255,255,255,.09)}
@media(max-width:840px){.nav{display:none}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:13px;
  font-weight:700;font-size:15px;color:#04121a;
  background:linear-gradient(135deg,var(--c1),var(--c2));
  box-shadow:0 14px 34px -16px rgba(56,224,200,.85);
  transition:transform .25s,box-shadow .25s;flex-shrink:0;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 18px 40px -16px rgba(56,224,200,1)}
.btn.ghost{background:transparent;color:var(--txt);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover{border-color:rgba(255,255,255,.3);background:rgba(255,255,255,.045)}
.btn.sm{padding:9px 17px;font-size:14px;border-radius:11px}
@media(max-width:840px){.head-inner .btn{display:none}}

/* ---------- hero ---------- */
.hero{position:relative;padding:94px 0 68px;overflow:hidden}
.hero::before{
  content:"";position:absolute;left:-10%;right:-10%;top:-40%;height:760px;pointer-events:none;
  background:
    radial-gradient(620px 340px at 18% 34%, rgba(56,224,200,.20), transparent 68%),
    radial-gradient(560px 320px at 80% 18%, rgba(176,107,255,.19), transparent 70%),
    radial-gradient(680px 420px at 52% 96%, rgba(108,140,255,.16), transparent 72%);
  filter:blur(8px);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(70% 58% at 50% 18%,#000 5%,transparent 76%);
  mask-image:radial-gradient(70% 58% at 50% 18%,#000 5%,transparent 76%);
}
.hero .wrap{position:relative;z-index:2}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;font-size:13.5px;font-weight:700;
  color:var(--c1);letter-spacing:.06em;padding:7px 15px;border-radius:999px;
  border:1px solid rgba(56,224,200,.28);background:rgba(56,224,200,.07);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c1);box-shadow:0 0 12px var(--c1)}
h1{font-size:clamp(33px,5.6vw,62px);margin:22px 0 22px;letter-spacing:-.025em;font-weight:850}
.grad{
  background:linear-gradient(100deg,var(--c1),var(--c2) 48%,var(--c3));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.lead{max-width:730px;color:var(--muted);font-size:17px}
.cta{display:flex;flex-wrap:wrap;gap:14px;margin:34px 0 26px}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chips span{
  font-size:13px;color:var(--muted);padding:5px 13px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.028);
}

/* ---------- metrics ---------- */
.metrics{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.014)}
.metrics .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.metric{padding:30px 26px;border-right:1px solid var(--line)}
.metric:last-child{border-right:none}
.metric b{
  display:block;font-size:34px;font-weight:850;letter-spacing:-.02em;line-height:1.1;
  background:linear-gradient(120deg,var(--c1),var(--c2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric span{display:block;margin-top:6px;font-size:14px;color:var(--muted)}
@media(max-width:820px){
  .metrics .grid{grid-template-columns:repeat(2,1fr)}
  .metric{border-bottom:1px solid var(--line)}
  .metric:nth-child(2n){border-right:none}
}
@media(max-width:460px){.metrics .grid{grid-template-columns:1fr}.metric{border-right:none}}

/* ---------- sections ---------- */
.sec{padding:80px 0}
.sec.alt{background:linear-gradient(180deg,rgba(255,255,255,.018),transparent)}
.sec-head{max-width:780px;margin-bottom:38px}
.kicker{font-size:12.5px;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--c1)}
h2{font-size:clamp(25px,3.5vw,40px);margin:12px 0 14px;letter-spacing:-.022em}
.sec-head p{color:var(--muted);font-size:16px}

.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}

.card{
  position:relative;padding:26px;border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.048),rgba(255,255,255,.014));
  border:1px solid var(--line);transition:transform .28s,border-color .28s,background .28s;
}
.card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.2);background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02))}
.card h3{font-size:18px;margin-bottom:9px}
.card p{color:var(--muted);font-size:15px}
.ic{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;
  font-size:19px;margin-bottom:16px;
  background:rgba(56,224,200,.11);border:1px solid rgba(56,224,200,.26);
}
.ic.v2{background:rgba(108,140,255,.12);border-color:rgba(108,140,255,.3)}
.ic.v3{background:rgba(176,107,255,.12);border-color:rgba(176,107,255,.3)}
.ic.v4{background:rgba(255,196,84,.1);border-color:rgba(255,196,84,.28)}

/* ---------- split panel ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
@media(max-width:900px){.split{grid-template-columns:1fr;gap:30px}}
.code{
  border-radius:16px;border:1px solid var(--line);background:#0a0e18;
  padding:20px 22px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13.5px;line-height:1.9;overflow-x:auto;
  box-shadow:0 30px 70px -40px rgba(0,0,0,.9);
}
.code .k{color:#8bb6ff}
.code .s{color:#7ce0c0}
.code .c{color:#5f6b80}
.code .p{color:#c79bff}

/* ---------- checklist ---------- */
.list{list-style:none;padding:0;margin:22px 0 0;display:grid;gap:12px}
.list li{display:flex;gap:12px;color:var(--muted);font-size:15px}
.list li::before{
  content:"";flex-shrink:0;width:18px;height:18px;margin-top:5px;border-radius:6px;
  background:linear-gradient(135deg,var(--c1),var(--c2));
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/contain no-repeat;
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/contain no-repeat;
}
.list li b{color:var(--txt);font-weight:700}

/* ---------- faq ---------- */
.faq{max-width:880px}
.faq details{
  border:1px solid var(--line);border-radius:15px;background:rgba(255,255,255,.024);
  padding:0 22px;margin-bottom:12px;transition:background .25s,border-color .25s;
}
.faq details[open]{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.17)}
.faq summary{
  cursor:pointer;list-style:none;padding:19px 0;font-weight:700;font-size:16.5px;
  display:flex;justify-content:space-between;align-items:center;gap:18px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--c1);font-size:22px;font-weight:400;line-height:1;transition:transform .25s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{padding-bottom:20px;color:var(--muted);font-size:15px}

/* ---------- end cta ---------- */
.end{
  position:relative;overflow:hidden;text-align:center;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:
    radial-gradient(560px 300px at 50% 0%, rgba(56,224,200,.14), transparent 70%),
    radial-gradient(560px 320px at 50% 120%, rgba(176,107,255,.14), transparent 70%),
    var(--bg-soft);
  padding:78px 0;
}
.end h2{max-width:640px;margin:0 auto 14px}
.end p{color:var(--muted);max-width:600px;margin:0 auto 30px}
.end .cta{justify-content:center;margin-bottom:0}

/* ---------- footer ---------- */
.site-foot{background:#060911;padding:58px 0 34px;border-top:1px solid var(--line)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr 1fr;gap:28px}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}}
.foot-grid h4{font-size:14px;letter-spacing:.05em;color:var(--txt);margin-bottom:14px}
.foot-grid a{display:block;color:var(--muted);font-size:14.5px;padding:5px 0;transition:color .2s}
.foot-grid a:hover{color:var(--c1)}
.foot-desc{color:var(--muted);font-size:14.5px;max-width:320px;margin-top:14px}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line)}
.foot-tags a{
  font-size:12.5px;color:var(--muted);padding:5px 12px;border-radius:999px;
  border:1px solid var(--line);transition:.2s;
}
.foot-tags a:hover{color:var(--c1);border-color:rgba(56,224,200,.35)}
.copy{margin-top:24px;font-size:13px;color:#5f6b80}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{scroll-behavior:auto!important}
}