:root{
  --ink:#0d1726;
  --navy:#152033;
  --navy-2:#1b2a43;
  --accent:#006ed2;
  --accent-2:#2b8be8;
  --bg:#f5f7fa;
  --card:#ffffff;
  --line:#e3e8ef;
  --muted:#5b6b80;
  --muted-2:#8494a8;
  --ok:#1f8a4c;
  --radius:16px;
  --shadow:0 10px 30px rgba(16,32,56,.10);
  --shadow-lg:0 30px 70px rgba(9,20,38,.28);
  --max:1150px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei UI","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:none}
code{
  font-family:"Cascadia Mono",Consolas,"Courier New",monospace;
  font-size:.9em;
  background:#eef2f7;
  border:1px solid var(--line);
  border-radius:6px;
  padding:1px 5px;
  color:#27405e;
  white-space:nowrap;
}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------------- nav ---------------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid rgba(20,34,54,.08);
}
.nav-inner{display:flex;align-items:center;gap:26px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;letter-spacing:.2px}
.brand img{border-radius:9px;box-shadow:0 4px 12px rgba(0,60,130,.25)}
.brand em{font-style:normal;font-weight:500;color:var(--muted-2);font-size:14px;margin-left:2px}
.links{display:flex;gap:24px;margin-left:auto;font-size:14.5px}
.links a{color:#33475f;font-weight:500}
.links a:hover{color:var(--accent)}
.nav-cta{display:flex;align-items:center;gap:10px}
.burger{display:none;background:none;border:0;padding:6px;cursor:pointer}
.burger span{display:block;width:20px;height:2px;background:#20344c;margin:4px 0;border-radius:2px;transition:.2s}

/* ---------------- buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  border-radius:10px;font-weight:600;line-height:1.2;
  padding:11px 18px;border:1px solid transparent;
  transition:transform .15s ease,box-shadow .15s ease,background .15s ease;
  cursor:pointer;text-align:center;
}
.btn:active{transform:translateY(1px)}
.btn-sm{padding:8px 14px;font-size:14px}
.btn-lg{padding:15px 24px;font-size:16.5px;border-radius:12px}
.btn-lg small{font-weight:500;opacity:.85;font-size:13px}
.btn-primary{background:linear-gradient(180deg,var(--accent-2),var(--accent));color:#fff;box-shadow:0 10px 24px rgba(0,110,210,.32)}
.btn-primary:hover{box-shadow:0 14px 30px rgba(0,110,210,.42)}
.btn-ghost{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.28);color:#eaf2ff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-light{background:#fff;color:#0d1726}
.btn-block{display:flex;width:100%;margin-top:18px}

/* ---------------- hero ---------------- */
.hero{
  position:relative;overflow:hidden;color:#eef4ff;
  background:
    radial-gradient(1100px 520px at 78% -8%,rgba(43,139,232,.34),transparent 62%),
    radial-gradient(760px 420px at 8% 108%,rgba(0,110,210,.22),transparent 65%),
    linear-gradient(160deg,#101b2c 0%,#152033 52%,#0e1828 100%);
  padding:74px 0 96px;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(80% 70% at 60% 20%,#000 40%,transparent 100%);
}
.hero-glow{position:absolute;width:620px;height:620px;right:-120px;top:-220px;background:radial-gradient(circle,rgba(0,140,255,.35),transparent 60%);filter:blur(20px)}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;letter-spacing:.3px;color:#a9c4e6;margin:0 0 18px;padding:6px 12px;border:1px solid rgba(150,190,235,.22);border-radius:999px;background:rgba(120,170,230,.08)}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:#43d17a;box-shadow:0 0 0 4px rgba(67,209,122,.16)}
.hero h1{font-size:52px;line-height:1.12;margin:0 0 18px;letter-spacing:-.5px;font-weight:800}
.hero h1 .grad{background:linear-gradient(92deg,#7cc4ff,#2b8be8 55%,#9ad7ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:17.5px;color:#b9cbe3;max-width:33em;margin:0 0 28px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}
.fineprint{margin:20px 0 0;font-size:12.8px;color:#8fa5c1}

.hero-shot{position:relative}
.window{background:#0b1422;border:1px solid rgba(140,180,230,.2);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-lg);transform:perspective(1400px) rotateY(-4deg) rotateX(1.5deg)}
.window-bar{display:flex;align-items:center;gap:7px;padding:10px 12px;background:linear-gradient(#1b2940,#16233a);border-bottom:1px solid rgba(140,180,230,.16)}
.window-bar i{width:9px;height:9px;border-radius:50%;background:#3a4f6d}
.window-bar i:nth-child(1){background:#ff6058}
.window-bar i:nth-child(2){background:#ffbd2e}
.window-bar i:nth-child(3){background:#28c840}
.window-bar span{margin-left:8px;font-size:12px;color:#8fa5c1}
.float-card{
  position:absolute;left:-18px;bottom:-26px;background:#fff;color:var(--ink);
  border-radius:14px;padding:14px 18px;box-shadow:0 18px 40px rgba(6,18,36,.35);
  display:flex;align-items:baseline;gap:8px;border:1px solid #e8eef6;
}
.float-card strong{font-size:26px;line-height:1;color:var(--accent);letter-spacing:-.5px}
.float-card span{font-size:12.5px;color:var(--muted)}

/* ---------------- stats ---------------- */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:22px 24px}
.stats-inner > div{display:flex;flex-direction:column;align-items:center;text-align:center;padding:6px 4px}
.stats-inner strong{font-size:24px;letter-spacing:-.4px;color:var(--navy)}
.stats-inner span{font-size:12.8px;color:var(--muted-2);margin-top:2px}

/* ---------------- sections ---------------- */
.section{padding:76px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.kicker{margin:0 0 10px;font-size:12.5px;font-weight:700;letter-spacing:2.4px;text-transform:uppercase;color:var(--accent)}
h2{font-size:33px;line-height:1.25;margin:0 0 12px;letter-spacing:-.4px}
.section-lead{color:var(--muted);max-width:44em;margin:0 0 34px;font-size:16.5px}
.narrow{max-width:820px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 26px 24px;box-shadow:0 2px 6px rgba(16,32,56,.04);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfdcea}
.card h3{margin:14px 0 8px;font-size:18.5px}
.card p{margin:0;color:var(--muted);font-size:15px}
.card code{font-size:.86em}
.ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(180deg,#eaf3ff,#dceafc);border:1px solid #cfe2f8;color:var(--accent)}
.ico svg{width:23px;height:23px}

/* shots */
.shots{display:grid;gap:18px}
.shot-tabs{display:flex;gap:8px;flex-wrap:wrap}
.shot-tab{
  border:1px solid var(--line);background:#fff;color:#3a4f68;
  padding:9px 15px;border-radius:999px;font:inherit;font-size:14px;cursor:pointer;
  transition:.15s;
}
.shot-tab:hover{border-color:#c8d8ea}
.shot-tab.is-active{background:var(--navy);border-color:var(--navy);color:#fff}
.shot-stage{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.shot-stage img{border-radius:10px;border:1px solid #e8eef6;width:100%}
.shot-stage figcaption{margin:12px 4px 2px;font-size:13.5px;color:var(--muted-2)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:30px}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.step .num{
  display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;
  background:linear-gradient(180deg,var(--accent-2),var(--accent));color:#fff;font-weight:700;font-size:14.5px;
  box-shadow:0 6px 14px rgba(0,110,210,.28);
}
.step h3{margin:14px 0 8px;font-size:17px}
.step p{margin:0;color:var(--muted);font-size:14.6px}

/* panels */
.split{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.panel-accent{border-color:#bfdbfb;background:linear-gradient(180deg,#f4f9ff,#fff)}
.panel-title{margin:0 0 14px;font-size:17px}
.check-list{list-style:none;margin:0;padding:0}
.check-list li{position:relative;padding:7px 0 7px 28px;color:#3b4f68;font-size:14.8px;border-bottom:1px dashed #eef2f7}
.check-list li:last-child{border-bottom:0}
.check-list li::before{
  content:"";position:absolute;left:2px;top:14px;width:14px;height:8px;
  border-left:2px solid var(--ok);border-bottom:2px solid var(--ok);
  transform:rotate(-45deg);border-radius:1px;
}
.panel-accent .check-list li::before{border-color:var(--accent)}
.note{margin:22px 0 0;font-size:13.4px;color:var(--muted-2)}

/* download */
.dl{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:22px;padding:36px;box-shadow:var(--shadow)}
.dl-meta{color:var(--muted);margin:0 0 22px;font-size:14.8px}
.hash{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:22px;font-size:12.5px;color:var(--muted-2)}
.hash span{font-weight:700;letter-spacing:.6px}
.hash code{flex:0 0 100%;order:3;max-width:100%;overflow-wrap:anywhere;white-space:normal;font-size:12px;line-height:1.6;padding:8px 10px}
.copy{border:1px solid var(--line);background:#fff;border-radius:8px;padding:5px 10px;font-size:12px;cursor:pointer;color:#3a4f68}
.copy:hover{border-color:#c8d8ea}
.dl-facts{list-style:none;margin:0;padding:0;border-left:1px solid var(--line);padding-left:28px}
.dl-facts li{display:flex;flex-direction:column;gap:2px;padding:12px 0;border-bottom:1px dashed #eef2f7}
.dl-facts li:last-child{border-bottom:0}
.dl-facts b{font-size:13px;letter-spacing:.4px;color:var(--navy)}
.dl-facts span{font-size:14px;color:var(--muted)}

/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:4px 20px;margin-bottom:10px}
details[open]{border-color:#cfdcea;box-shadow:0 4px 14px rgba(16,32,56,.05)}
summary{cursor:pointer;padding:15px 0;font-weight:600;list-style:none;position:relative;padding-right:28px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:2px;top:13px;color:var(--muted-2);font-weight:400;font-size:20px;line-height:1}
details[open] summary::after{content:"–"}
details p{margin:0 0 16px;color:var(--muted);font-size:15px}

/* final cta */
.final-cta{background:linear-gradient(150deg,#12203a,#0d1726 70%);color:#eaf2ff;text-align:center;padding:70px 0}
.final-cta h2{margin-bottom:8px}
.final-cta p{color:#9fb4cf;margin:0 0 26px}

/* footer */
.foot{background:#0b1422;color:#8fa5c1;padding:34px 0;border-top:1px solid rgba(140,180,230,.12)}
.foot-inner{display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.foot-brand{display:flex;align-items:center;gap:10px;color:#dbe7f7;font-weight:600}
.foot-brand img{border-radius:8px}
.foot-links{display:flex;gap:20px;margin-left:auto;font-size:14px}
.foot-links a{color:#9fb4cf}
.foot-links a:hover{color:#fff}
.foot-note{flex-basis:100%;margin:4px 0 0;font-size:12.6px;color:#6f86a3}

/* reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}

/* ---------------- responsive ---------------- */
@media (max-width:1000px){
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .hero h1{font-size:42px}
  .window{transform:none}
  .float-card{left:auto;right:8px;bottom:-22px}
  .cards{grid-template-columns:1fr}
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .dl{grid-template-columns:1fr;padding:28px}
  .dl-facts{border-left:0;padding-left:0;border-top:1px solid var(--line);margin-top:10px;padding-top:6px}
}
@media (max-width:760px){
  .links{
    position:absolute;top:64px;left:0;right:0;display:none;flex-direction:column;gap:0;
    background:#fff;border-bottom:1px solid var(--line);padding:8px 24px 14px;margin:0;
    box-shadow:0 18px 30px rgba(16,32,56,.10);
  }
  .links.open{display:flex}
  .links a{padding:11px 0;border-bottom:1px dashed #eef2f7;font-size:15px}
  .links a:last-child{border-bottom:0}
  .burger{display:block}
  .nav-cta .btn{display:none}
  .hero{padding:52px 0 78px}
  .hero h1{font-size:34px}
  .lead{font-size:16px}
  h2{font-size:26px}
  .section{padding:56px 0}
  .cta-row .btn{width:100%}
  .stats-inner strong{font-size:21px}
  .foot-links{margin-left:0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .card:hover{transform:none}
}