:root{
  --brand:#4D6BFE;
  --brand-hover:#3A57E8;
  --brand-50:#F0F3FF;
  --brand-100:#DDE4FF;
  --ink:#0C1220;
  --text:#1B2335;
  --text-2:#4A5468;
  --text-3:#7A8498;
  --bg:#FFFFFF;
  --bg-soft:#F5F7FC;
  --bg-deep:#0A1024;
  --line:#E3E8F2;
  --line-dark:rgba(255,255,255,.12);
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --shadow:0 1px 2px rgba(12,18,32,.04),0 8px 24px -12px rgba(12,18,32,.12);
  --shadow-lg:0 2px 4px rgba(12,18,32,.04),0 24px 60px -24px rgba(20,40,120,.28);
  --wrap:1160px;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--text);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3{color:var(--ink);line-height:1.2;letter-spacing:-.02em;margin:0}
p{margin:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
.mono{font-family:var(--mono);font-size:.86em}
.wrap{width:min(var(--wrap),100% - 48px);margin-inline:auto}
.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;border-radius:0 0 var(--r-sm) 0;z-index:99}
.skip:focus{left:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 22px;border-radius:var(--r-sm);
  border:1px solid transparent;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -10px rgba(77,107,254,.8)}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:0 12px 26px -10px rgba(77,107,254,.9)}
.btn-line{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-line:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-50)}
.btn-ghost{background:var(--brand-50);color:var(--brand);padding:10px 16px;font-size:14px}
.btn-ghost:hover{background:var(--brand-100)}
.btn-lg{padding:17px 28px;font-size:16px}
.arr{font-family:var(--sans);transition:transform .18s ease}
.btn:hover .arr{transform:translateX(3px)}

/* ---------- topbar ---------- */
.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;gap:32px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;letter-spacing:-.01em}
.brand-mark{width:28px;height:28px;color:var(--brand);flex:none}
.brand-name{font-size:17px}
.nav{display:flex;gap:26px;margin-left:auto;font-size:14.5px;color:var(--text-2)}
.nav a{position:relative;padding:6px 0;transition:color .18s ease}
.nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--brand);transition:right .2s ease}
.nav a:hover{color:var(--ink)}
.nav a:hover::after{right:0}
.topbar-cta{flex:none}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(900px 420px at 82% -10%,rgba(77,107,254,.16),transparent 70%),
  radial-gradient(600px 320px at 4% 110%,rgba(77,107,254,.09),transparent 70%),
  linear-gradient(180deg,#FBFCFF,#FFFFFF 70%);
  border-bottom:1px solid var(--line);
}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(12,18,32,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(12,18,32,.035) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(70% 60% at 50% 30%,#000,transparent 85%);
  -webkit-mask-image:radial-gradient(70% 60% at 50% 30%,#000,transparent 85%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;padding:88px 0 92px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;letter-spacing:.04em;color:var(--brand);background:var(--brand-50);border:1px solid var(--brand-100);padding:7px 14px;border-radius:999px;margin-bottom:26px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 3px rgba(77,107,254,.18)}
.hero h1{font-size:clamp(36px,4.6vw,60px);font-weight:800;letter-spacing:-.035em;line-height:1.1}
.hl{color:var(--brand);position:relative;display:inline-block}
.hl::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:10px;background:var(--brand-100);z-index:-1;border-radius:3px}
.lede{margin-top:24px;font-size:17px;color:var(--text-2);max-width:34em}
.lede strong{color:var(--ink);font-family:var(--mono);font-weight:600;font-size:.94em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.hero-facts li{font-size:13px;color:var(--text-3);border:1px solid var(--line);border-radius:999px;padding:5px 13px;background:#fff}

/* hero panel */
.hero-panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);overflow:hidden;transform:rotate(-1.2deg)}
.panel-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line);background:var(--bg-soft)}
.pill{font-size:12px;font-weight:600;color:var(--brand);background:#fff;border:1px solid var(--brand-100);padding:3px 10px;border-radius:999px}
.panel-bar .mono{color:var(--text-3);font-size:12px}
.code{margin:0;padding:24px 22px;font-family:var(--mono);font-size:13.5px;line-height:1.85;color:var(--text);background:#fff;overflow-x:auto}
.code .k{color:#7A3FE0}
.code .s{color:#0B7A57}
.panel-flow{display:flex;align-items:center;gap:10px;padding:16px 22px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--text-2)}
.panel-flow span{background:var(--brand-50);color:var(--brand);border-radius:6px;padding:4px 10px;font-weight:600}
.panel-flow i{flex:1;height:1px;background:linear-gradient(90deg,var(--brand-100),transparent)}
.panel-foot{padding:12px 22px;background:var(--bg-deep);color:#B9C4E8;font-size:12px;letter-spacing:.02em}

/* ---------- generic section ---------- */
.section{padding:96px 0;border-bottom:1px solid var(--line)}
.section-soft{background:var(--bg-soft)}
.sec-head{max-width:640px;margin-bottom:52px}
.sec-head h2{font-size:clamp(26px,3vw,38px);font-weight:800;letter-spacing:-.03em;margin-top:14px}
.kicker{font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--brand);font-weight:600}
.sub{margin-top:16px;color:var(--text-2);font-size:16px}

/* ---------- engines ---------- */
.engine-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.engine-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:28px 26px 26px;box-shadow:var(--shadow);transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease}
.engine-card:hover{transform:translateY(-4px);border-color:var(--brand-100);box-shadow:var(--shadow-lg)}
.engine-card.is-featured{border-color:var(--brand);background:linear-gradient(180deg,#fff, #FAFBFF)}
.engine-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px}
.tag{font-size:12px;font-weight:600;color:#fff;background:var(--brand);padding:4px 10px;border-radius:999px}
.tag-alt{background:var(--brand-50);color:var(--brand)}
.engine-id{color:var(--text-3);font-size:12.5px}
.engine-card h3{font-size:19px;font-weight:700;margin-bottom:12px}
.engine-card p{color:var(--text-2);font-size:14.5px}
.ticks{margin-top:20px;display:grid;gap:9px}
.ticks li{position:relative;padding-left:22px;font-size:14px;color:var(--text-2)}
.ticks li::before{content:"";position:absolute;left:0;top:.52em;width:9px;height:9px;border-radius:3px;background:var(--brand-100);border:1px solid var(--brand)}

/* ---------- flow ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.flow-step{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:26px 22px;box-shadow:var(--shadow);position:relative}
.flow-step::after{content:"";position:absolute;top:44px;right:-20px;width:20px;height:1px;background:var(--line)}
.flow-step:last-child::after{display:none}
.flow-no{display:inline-block;font-size:12px;font-weight:700;color:var(--brand);background:var(--brand-50);border-radius:6px;padding:3px 9px;margin-bottom:16px}
.flow-step h3{font-size:17px;font-weight:700;margin-bottom:10px}
.flow-step p{font-size:14px;color:var(--text-2)}
.flow-note{margin-top:28px;font-size:14px;color:var(--text-3);border-left:2px solid var(--brand);padding-left:14px}

/* ---------- console ---------- */
.console-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cap{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:26px 24px;transition:border-color .2s ease,transform .2s ease}
.cap:hover{border-color:var(--brand-100);transform:translateY(-3px)}
.cap-ico{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:11px;background:var(--brand-50);color:var(--brand);margin-bottom:18px}
.cap-ico svg{width:22px;height:22px}
.cap h3{font-size:16.5px;font-weight:700;margin-bottom:9px}
.cap p{font-size:14px;color:var(--text-2)}

/* ---------- deploy ---------- */
.section-dark{background:
  radial-gradient(700px 340px at 88% 0%,rgba(77,107,254,.32),transparent 70%),
  linear-gradient(180deg,#0A1024,#0D1530);
  color:#C9D3EE;border-bottom:none}
.section-dark h2{color:#fff}
.section-dark .kicker{color:#8FA6FF}
.section-dark .sub{color:#A3B0D2}
.deploy-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.ticks-dark li{color:#C9D3EE}
.ticks-dark li::before{background:rgba(143,166,255,.25);border-color:#8FA6FF}
.deploy-copy .btn{margin-top:32px}
.deploy-diagram{display:grid;gap:0;border:1px solid var(--line-dark);border-radius:var(--r-lg);padding:26px;background:rgba(255,255,255,.03);backdrop-filter:blur(6px)}
.dnode{display:flex;flex-direction:column;gap:6px;padding:18px 20px;border:1px solid var(--line-dark);border-radius:var(--r-sm);background:rgba(255,255,255,.04)}
.dnode-accent{border-color:rgba(143,166,255,.5);background:rgba(77,107,254,.14)}
.dlabel{font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:#8FA6FF}
.dtext{font-size:14px;color:#E4EAFA}
.darrow{display:flex;align-items:center;justify-content:center;gap:10px;padding:10px 0;color:#7C8AB4;font-size:12px}
.darrow::before,.darrow::after{content:"";flex:1;height:1px;background:var(--line-dark)}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:start}
.sec-head-left{margin-bottom:0;position:sticky;top:96px}
.faq{display:grid;gap:12px}
.faq details{border:1px solid var(--line);border-radius:var(--r-md);background:#fff;padding:0 22px;transition:border-color .2s ease,box-shadow .2s ease}
.faq details[open]{border-color:var(--brand-100);box-shadow:var(--shadow)}
.faq summary{cursor:pointer;list-style:none;font-weight:600;font-size:15.5px;color:var(--ink);padding:19px 30px 19px 0;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:2px;top:50%;width:9px;height:9px;border-right:2px solid var(--text-3);border-bottom:2px solid var(--text-3);transform:translateY(-70%) rotate(45deg);transition:transform .2s ease}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--brand)}
.faq details p{padding:0 0 20px;font-size:14.5px;color:var(--text-2);max-width:52em}

/* ---------- cta ---------- */
.cta{padding:88px 0;background:linear-gradient(120deg,var(--brand-50),#fff 55%,#F3F6FF);border-bottom:1px solid var(--line)}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:48px;flex-wrap:wrap}
.cta h2{font-size:clamp(24px,2.8vw,34px);font-weight:800;letter-spacing:-.03em;max-width:20em}
.cta p{margin-top:14px;color:var(--text-2)}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.foot{background:var(--bg-deep);color:#93A0C0;padding:56px 0 28px}
.foot-inner{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:36px;border-bottom:1px solid var(--line-dark)}
.foot .brand{color:#fff}
.foot .brand-mark{color:#8FA6FF}
.foot-brand p{margin-top:14px;font-size:14px;max-width:26em}
.foot-brand .mono{color:#C9D3EE}
.foot-nav{display:flex;flex-wrap:wrap;gap:14px 26px;font-size:14px;align-content:flex-start}
.foot-nav a{transition:color .18s ease}
.foot-nav a:hover{color:#fff}
.foot-base{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:12.5px;color:#6B779A}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:44px;padding:64px 0 72px}
  .hero-panel{transform:none;max-width:560px}
  .engine-grid,.console-grid{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:1fr 1fr}
  .flow-step::after{display:none}
  .deploy-grid,.faq-wrap{grid-template-columns:1fr;gap:40px}
  .sec-head-left{position:static}
}
@media (max-width:768px){
  .wrap{width:min(var(--wrap),100% - 36px)}
  .nav{display:none}
  .topbar-inner{height:62px;gap:16px}
  .topbar-cta{margin-left:auto}
  .section{padding:68px 0}
  .engine-grid,.console-grid,.flow{grid-template-columns:1fr}
  .sec-head{margin-bottom:36px}
  .hero h1{font-size:clamp(30px,8vw,40px)}
  .hero-actions .btn{flex:1;justify-content:center}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:28px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1;justify-content:center}
  .foot-inner{flex-direction:column;gap:28px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}