:root{
  --bg:#060b1a;
  --bg-2:#0a1330;
  --panel:#101c3d;
  --panel-2:#16244d;
  --line:rgba(120,170,255,.16);
  --text:#eaf1ff;
  --muted:#9fb2d8;
  --brand:#25a8ff;
  --brand-2:#0b5cff;
  --accent:#37e6c8;
  --radius:16px;
  --wrap:1180px;
  --grad:linear-gradient(120deg,#25a8ff,#0b5cff);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.25;margin:0 0 .5em}
h1{font-size:clamp(30px,5vw,52px);letter-spacing:-.02em}
h2{font-size:clamp(24px,3.4vw,36px);letter-spacing:-.01em}
h3{font-size:19px}
p{margin:0 0 1em;color:var(--muted)}
.lead{font-size:18px;color:var(--muted);max-width:640px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(6,11,26,.85);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px}
.brand img{width:32px;height:32px}
.nav-links{display:flex;gap:22px;margin-left:8px;flex-wrap:wrap}
.nav-links a{color:var(--muted);font-size:15px;padding:6px 0;border-bottom:2px solid transparent}
.nav-links a:hover,.nav-links a.active{color:#fff;border-color:var(--brand)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-size:13px}
.lang a{padding:5px 12px;color:var(--muted)}
.lang a.on{background:var(--panel-2);color:#fff}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:999px;font-weight:600;font-size:15px;border:1px solid transparent;transition:.2s transform,.2s opacity}
.btn:hover{transform:translateY(-1px);opacity:.94}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 30px rgba(11,92,255,.35)}
.btn-ghost{border-color:var(--line);color:var(--text);background:rgba(255,255,255,.03)}
.btn-sm{padding:9px 18px;font-size:14px}

/* sections */
section{padding:72px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 44px}
.section-head p{margin:0}
.hero{padding:80px 0 40px;background:radial-gradient(900px 480px at 78% 8%,rgba(37,168,255,.20),transparent 60%),radial-gradient(700px 460px at 8% 30%,rgba(11,92,255,.16),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border:1px solid var(--line);border-radius:999px;font-size:13px;color:var(--accent);margin-bottom:18px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.hero-media img{border-radius:22px;border:1px solid var(--line);box-shadow:0 30px 80px rgba(0,0,0,.5)}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:52px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center}
.stat b{display:block;font-size:26px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:14px;color:var(--muted)}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
.card:hover{border-color:rgba(37,168,255,.45);transform:translateY(-3px)}
.card h3{margin-bottom:8px}
.card p{margin:0;font-size:15px}
.icon{width:44px;height:44px;border-radius:12px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:16px}

.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.split.rev .split-media{order:2}
.split-media img{border-radius:18px;border:1px solid var(--line)}
.alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.plan{background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);border-radius:20px;padding:30px;display:flex;flex-direction:column}
.plan.featured{border-color:rgba(37,168,255,.6);box-shadow:0 20px 60px rgba(11,92,255,.22)}
.badge{align-self:flex-start;background:var(--grad);color:#fff;font-size:12px;padding:4px 12px;border-radius:999px;margin-bottom:12px}
.price{font-size:40px;font-weight:700;margin:6px 0}
.price small{font-size:15px;color:var(--muted);font-weight:400}
.plan ul{list-style:none;padding:0;margin:18px 0 26px;color:var(--muted);font-size:15px}
.plan ul li{padding:7px 0 7px 26px;position:relative}
.plan ul li:before{content:"✓";position:absolute;left:0;color:var(--accent)}
.plan .btn{margin-top:auto}

/* download / platforms */
.platforms{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.platform{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center}
.platform .icon{margin:0 auto 14px}
.platform small{display:block;color:var(--muted);margin-bottom:14px;font-size:13px}

/* guide */
.steps{counter-reset:s;display:grid;gap:16px}
.step{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 22px 68px;position:relative}
.step:before{counter-increment:s;content:counter(s);position:absolute;left:22px;top:22px;width:30px;height:30px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.faq{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:20px 22px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq p{margin:12px 0 0}

.cta{background:linear-gradient(120deg,rgba(37,168,255,.16),rgba(11,92,255,.16));border:1px solid var(--line);border-radius:24px;padding:48px;text-align:center;margin:0 auto}

/* footer */
.site-footer{border-top:1px solid var(--line);background:var(--bg-2);padding:52px 0 28px;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:28px}
.foot-grid h4{margin:0 0 14px;font-size:15px}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li{margin-bottom:9px}
.foot-grid a{color:var(--muted);font-size:14px}
.foot-grid a:hover{color:#fff}
.copy{border-top:1px solid var(--line);margin-top:34px;padding-top:18px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

@media (max-width:960px){
  .hero-grid,.split,.grid-3,.grid-2,.grid-4,.plans,.stats,.platforms,.foot-grid{grid-template-columns:1fr}
  .split.rev .split-media{order:0}
  .nav{height:auto;flex-wrap:wrap;padding:12px 0;gap:12px}
  .nav-links{order:3;width:100%;gap:16px;overflow-x:auto}
  .stats{grid-template-columns:repeat(2,1fr)}
  .platforms{grid-template-columns:repeat(2,1fr)}
  section{padding:52px 0}
  .cta{padding:32px 20px}
}