:root{
  --ink:#0f1420;
  --body:#3f4757;
  --muted:#6b7488;
  --line:#e4e7ee;
  --bg:#ffffff;
  --soft:#f5f6fa;
  --brand:#4c5fd7;
  --brand2:#8b5cf6;
  --dark:#0b0f1a;
  --radius:16px;
  --wrap:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth; scroll-padding-top:80px}
body{
  margin:0; background:var(--bg); color:var(--body);
  font:17px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{color:var(--ink); line-height:1.15; letter-spacing:-.02em; margin:0}
p{margin:0 0 1em}
a{color:var(--brand); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%; height:auto; display:block}
.wrap{max-width:var(--wrap); margin:0 auto; padding:0 24px}

/* ---------- header ---------- */
.site-head{
  position:sticky; top:0; z-index:60;
  background:rgba(255,255,255,.88); backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-head .wrap{display:flex; align-items:center; gap:26px; height:64px}
.brand{font-weight:800; font-size:21px; color:var(--ink); letter-spacing:-.5px}
.brand:hover{text-decoration:none}
.brand i{font-style:normal; background:linear-gradient(90deg,var(--brand),var(--brand2));
  -webkit-background-clip:text; background-clip:text; color:transparent}
.site-nav{display:flex; gap:22px; margin-left:8px}
.site-nav a{color:var(--body); font-size:15px; font-weight:500}
.head-right{margin-left:auto; display:flex; align-items:center; gap:12px}
.lang{display:flex; gap:2px; font-size:13px; font-weight:700}
.lang a{color:var(--muted); padding:5px 9px; border-radius:8px}
.lang a[aria-current]{background:var(--ink); color:#fff}
.lang a:hover{text-decoration:none; background:var(--soft)}
.lang a[aria-current]:hover{background:var(--ink)}
@media (max-width:860px){ .site-nav{display:none} }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:9px;
  padding:13px 22px; border-radius:12px; font-weight:650; font-size:16px;
  border:1px solid transparent; cursor:pointer; white-space:nowrap;
}
.btn:hover{text-decoration:none}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff;
  box-shadow:0 8px 22px -8px rgba(76,95,215,.7)}
.btn-primary:hover{filter:brightness(1.07)}
.btn-ghost{background:rgba(255,255,255,.08); color:#fff; border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.btn-outline{background:#fff; color:var(--ink); border-color:var(--line)}
.btn-outline:hover{border-color:var(--brand); color:var(--brand)}
.btn-sm{padding:9px 16px; font-size:15px}

/* ---------- hero ---------- */
.hero{
  background:
    radial-gradient(900px 420px at 12% -8%, rgba(76,95,215,.42), transparent 62%),
    radial-gradient(760px 420px at 92% 6%, rgba(139,92,246,.34), transparent 60%),
    var(--dark);
  color:#c9d0e0; padding:88px 0 0; overflow:hidden;
}
.hero h1{color:#fff; font-size:clamp(34px,5.6vw,58px); margin-bottom:20px; max-width:16ch}
.hero .sub{font-size:clamp(17px,2vw,20px); max-width:56ch; color:#aab3c7; margin-bottom:30px}
.hero .cta{display:flex; flex-wrap:wrap; gap:12px; margin-bottom:22px}
.hero .fine{font-size:14.5px; color:#7f8aa3}
.hero .fine strong{color:#b9c2d6; font-weight:600}
.hero-shot{margin-top:56px; position:relative}
.hero-shot img{
  border-radius:14px 14px 0 0; border:1px solid rgba(255,255,255,.14); border-bottom:0;
  box-shadow:0 -20px 70px -20px rgba(0,0,0,.8);
}

/* ---------- sections ---------- */
section{padding:84px 0}
section.soft{background:var(--soft); border-top:1px solid var(--line); border-bottom:1px solid var(--line)}
.eyebrow{
  font-size:12.5px; font-weight:800; letter-spacing:.13em; text-transform:uppercase;
  color:var(--brand); margin-bottom:12px;
}
.sec-head{max-width:64ch; margin-bottom:44px}
.sec-head h2{font-size:clamp(26px,3.6vw,38px); margin-bottom:14px}
.sec-head p{font-size:18px; color:var(--muted); margin:0}

/* ---------- grids ---------- */
.grid{display:grid; gap:20px}
.g3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.g2{grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}

.card{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  padding:26px 26px 28px; transition:.18s;
}
.card:hover{border-color:#c9cfe0; transform:translateY(-2px); box-shadow:0 14px 34px -22px rgba(15,20,32,.5)}
.card h3{font-size:19px; margin-bottom:9px}
.card p{margin:0; font-size:16px}
.card .ico{
  width:46px; height:46px; border-radius:13px; margin-bottom:18px;
  display:flex; align-items:center; justify-content:center;
  color:var(--brand);
  background:linear-gradient(135deg,rgba(76,95,215,.13),rgba(139,92,246,.13));
  border:1px solid rgba(76,95,215,.14);
}
.card .ico svg{width:23px; height:23px; display:block}

/* steps */
.step{position:relative; padding-top:14px}
.step .n{
  font-size:13px; font-weight:800; letter-spacing:.04em; color:var(--brand);
  border-top:3px solid var(--brand); padding-top:14px; display:block; margin-bottom:12px;
}
.step h3{font-size:18px; margin-bottom:8px}
.step p{font-size:15.5px; margin:0}

/* product links */
.plink{
  display:flex; flex-direction:column; gap:0;
  border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; background:#fff;
  transition:.18s;
}
.plink:hover{text-decoration:none; border-color:#c9cfe0; transform:translateY(-2px);
  box-shadow:0 16px 40px -24px rgba(15,20,32,.55)}
.plink img{border-bottom:1px solid var(--line)}
.plink .body{padding:22px 24px 24px}
.plink h3{font-size:19px; margin-bottom:6px}
.plink .host{font-size:13.5px; font-weight:700; color:var(--brand); margin-bottom:10px; letter-spacing:.01em}
.plink p{margin:0; font-size:15.5px; color:var(--body)}

/* about / tech */
.about{display:grid; gap:40px; grid-template-columns:minmax(0,1.2fr) minmax(0,1fr); align-items:start}
@media (max-width:860px){ .about{grid-template-columns:1fr} }
.techlist{list-style:none; margin:0; padding:0; display:grid; gap:12px}
.techlist li{display:flex; gap:12px; font-size:15.5px; align-items:baseline}
.techlist b{color:var(--ink); font-weight:700; flex:0 0 auto}
.techlist span{color:var(--muted)}

/* faq */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--line); padding:18px 0}
.faq summary{
  cursor:pointer; font-weight:650; color:var(--ink); font-size:17.5px; list-style:none;
  display:flex; justify-content:space-between; gap:16px; align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+"; color:var(--brand); font-size:22px; font-weight:400; line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:12px 0 0; font-size:16px}

/* cta band */
.band{
  background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff;
  border-radius:22px; padding:52px 44px; text-align:center;
}
.band h2{color:#fff; font-size:clamp(25px,3.2vw,34px); margin-bottom:12px}
.band p{color:rgba(255,255,255,.9); max-width:52ch; margin:0 auto 26px; font-size:17.5px}
.band .cta{display:flex; gap:12px; justify-content:center; flex-wrap:wrap}
.band .btn-outline{background:#fff; border-color:#fff}

/* footer */
footer{background:var(--dark); color:#8892a8; padding:54px 0 40px; font-size:15px}
footer a{color:#c3cadb}
footer .cols{display:grid; gap:30px; grid-template-columns:repeat(auto-fit,minmax(190px,1fr)); margin-bottom:34px}
footer h4{color:#fff; font-size:14px; letter-spacing:.06em; text-transform:uppercase; margin-bottom:14px}
footer ul{list-style:none; margin:0; padding:0; display:grid; gap:9px}
footer .base{border-top:1px solid rgba(255,255,255,.12); padding-top:22px; font-size:14px}