:root{
  --indigo:#4f46e5;
  --cyan:#06b6d4;
  --bg:#ffffff;
  --alt:#f5f8fd;
  --ink:#0f172a;
  --muted:#5b6b82;
  --line:#e7edf6;
  --grad:linear-gradient(120deg,var(--indigo),var(--cyan));
  --shadow:0 18px 40px rgba(31,45,90,.10);
  --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.wrap{width:min(1140px,92vw);margin:0 auto}
.alt{background:var(--alt)}
.section{padding:84px 0}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--indigo);background:rgba(79,70,229,.08);padding:6px 14px;border-radius:999px;margin-bottom:18px}
.sec-head{text-align:center;max-width:720px;margin:0 auto 46px}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);line-height:1.25;letter-spacing:-.5px}
.sec-head p{color:var(--muted);margin-top:14px;font-size:16px}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
.brand .mark{width:30px;height:30px;border-radius:9px;background:var(--grad);display:grid;place-items:center;color:#fff;font-size:15px}
.menu{display:flex;gap:28px;font-size:15px;color:var(--muted)}
.menu a:hover{color:var(--indigo)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:999px;font-weight:700;font-size:15px;transition:.2s;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 26px rgba(79,70,229,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(79,70,229,.40)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--indigo);color:var(--indigo)}
.btn-lg{padding:15px 30px;font-size:16px}

/* hero */
.hero{position:relative;overflow:hidden;padding:74px 0 86px;background:radial-gradient(1100px 520px at 78% -8%,rgba(6,182,212,.14),transparent 60%),radial-gradient(900px 480px at 8% 0%,rgba(79,70,229,.12),transparent 55%)}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.pill{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--indigo);background:#fff;border:1px solid var(--line);padding:7px 14px;border-radius:999px;box-shadow:var(--shadow);margin-bottom:22px}
.hero h1{font-size:clamp(32px,4.6vw,52px);line-height:1.16;letter-spacing:-1px}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin-top:20px;color:var(--muted);font-size:17px;max-width:560px}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.stats{display:flex;gap:30px;margin-top:38px;flex-wrap:wrap}
.stat b{display:block;font-size:28px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13px;color:var(--muted)}

/* panel mock */
.panel{background:#0f172a;color:#e6ebf5;border-radius:22px;padding:22px;box-shadow:0 26px 60px rgba(15,23,42,.30)}
.panel-top{display:flex;align-items:center;gap:10px;font-weight:700}
.panel-top .dot{width:9px;height:9px;border-radius:50%;background:#34d399;box-shadow:0 0 0 4px rgba(52,211,153,.22)}
.panel-top em{margin-left:auto;font-style:normal;font-size:12px;font-weight:700;color:#34d399;background:rgba(52,211,153,.14);padding:4px 10px;border-radius:999px}
.gauge{position:relative;margin:14px auto 6px;width:200px}
.gauge-val{position:absolute;left:0;right:0;bottom:6px;text-align:center}
.gauge-val b{font-size:34px}
.gauge-val small{display:block;font-size:11px;color:#9fb0c9}
.panel-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:8px 0 14px}
.panel-stats div{background:rgba(255,255,255,.06);border-radius:12px;padding:10px;text-align:center}
.panel-stats b{display:block;font-size:16px}
.panel-stats span{font-size:11px;color:#9fb0c9}
.panel-nodes{display:flex;flex-wrap:wrap;gap:8px}
.node{font-size:12px;font-weight:600;color:#cdd8ee;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.10);padding:8px 12px;border-radius:10px}
.node.on{color:#fff;background:var(--grad);border-color:transparent}
.panel-btn{margin-top:16px;width:100%;text-align:center;background:rgba(255,255,255,.10);color:#fff;font-weight:700;padding:12px;border-radius:12px;font-size:14px}

/* cards grid */
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d6e0f2}
.ico{width:50px;height:50px;border-radius:14px;background:rgba(79,70,229,.10);display:grid;place-items:center;font-size:24px;margin-bottom:16px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14.5px}

/* scenario */
.sce{display:flex;gap:16px;align-items:flex-start}
.sce .badge{flex:none;width:46px;height:46px;border-radius:12px;background:var(--grad);color:#fff;display:grid;place-items:center;font-size:22px}
.sce h3{font-size:17px;margin-bottom:6px}
.sce p{color:var(--muted);font-size:14px}

/* steps */
.steps{counter-reset:s}
.step{display:flex;gap:18px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.step .sn{flex:none;width:42px;height:42px;border-radius:12px;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px}
.step h3{font-size:16px;margin-bottom:4px}
.step p{color:var(--muted);font-size:14px}

/* faq */
.faq details{border:1px solid var(--line);border-radius:14px;padding:0 20px;margin-bottom:12px;background:#fff}
.faq summary{cursor:pointer;list-style:none;font-weight:700;padding:18px 0;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--indigo);font-weight:700}
.faq details[open] summary::after{content:"\2212"}
.faq details p{padding:0 0 18px;color:var(--muted);font-size:14.5px}

/* news placeholder */
.news .card{min-height:150px;display:flex;flex-direction:column;justify-content:space-between}
.news .meta{font-size:12px;color:var(--muted)}
.news .ph{height:10px;border-radius:6px;background:linear-gradient(90deg,#eef2f9,#e2e9f5);margin-top:12px}
.news .ph.s{width:60%}

/* testimonials */
.qa{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.qa p{color:var(--muted);font-size:14.5px}
.qa .who{display:flex;align-items:center;gap:10px;margin-top:16px}
.qa .av{width:38px;height:38px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:700}
.qa .who b{font-size:14px}
.qa .who span{display:block;font-size:12px;color:var(--muted)}

/* cta */
.cta{background:var(--grad);color:#fff;border-radius:26px;padding:56px 40px;text-align:center;position:relative;overflow:hidden}
.cta h2{font-size:clamp(26px,3.4vw,36px)}
.cta p{margin:14px auto 28px;max-width:560px;opacity:.92}
.cta .row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.cta .btn-ghost{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.35)}
.cta .btn-ghost:hover{background:rgba(255,255,255,.28);color:#fff}

/* footer */
.foot{padding:46px 0 34px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
.foot-in{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center}
.foot .brand{color:var(--ink)}
.foot a{color:var(--muted)}
.foot a:hover{color:var(--indigo)}

@media(max-width:880px){
  .hero-in{grid-template-columns:1fr;gap:38px}
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:1fr}
  .menu{display:none}
}
@media(max-width:520px){
  .g4{grid-template-columns:1fr}
  .section{padding:60px 0}
  .stats{gap:20px}
}