:root{
  --ink:#0f172a;
  --steel:#1e293b;
  --muted:#64748b;
  --line:#e2e8f0;
  --bg:#f8fafc;
  --paper:#ffffff;
  --accent:#c2410c;
  --radius:14px;
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}

.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.93);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.5px}
.brand-mark{
  width:34px;height:34px;border-radius:8px;
  background:linear-gradient(135deg,#0f172a,#334155);
  color:#fff;display:grid;place-items:center;font-size:13px;
}
.brand small{display:block;font-weight:400;color:var(--muted);font-size:11px;letter-spacing:2px}
.nav{display:flex;gap:22px;font-size:14px;color:#334155}
.nav a:hover{color:var(--accent)}

.hero{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(1200px 500px at 80% -10%,rgba(234,88,12,.28),transparent 60%),
    linear-gradient(135deg,#0b1220,#1e293b 60%,#0f172a);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:linear-gradient(to bottom,black,transparent 85%);
  mask-image:linear-gradient(to bottom,black,transparent 85%);
}
.hero-inner{position:relative;padding:88px 0 76px}
.tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border:1px solid rgba(255,255,255,.25);
  border-radius:999px;font-size:12px;letter-spacing:1px;color:#e2e8f0;
}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.15;margin:22px 0 18px;letter-spacing:-.5px}
.hero p.lead{max-width:640px;color:#cbd5e1;font-size:17px;margin:0 0 28px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 22px;border-radius:10px;font-weight:600;font-size:14px;
  border:1px solid transparent;cursor:pointer;
}
.btn-primary{background:linear-gradient(135deg,#ea580c,#c2410c);color:#fff}
.btn-ghost{border-color:rgba(255,255,255,.3);color:#fff}
.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:46px;max-width:760px}
.stat{border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);border-radius:12px;padding:16px 18px}
.stat b{display:block;font-size:22px;letter-spacing:-.5px}
.stat span{font-size:12px;color:#94a3b8}

.section{padding:72px 0}
.section-head{max-width:720px;margin-bottom:34px}
.section-head h2{font-size:clamp(24px,3vw,34px);margin:0 0 10px;letter-spacing:-.3px}
.section-head p{color:var(--muted);margin:0}
.kicker{color:var(--accent);font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;margin:0}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;transition:transform .2s,box-shadow .2s;
}
.card:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(15,23,42,.08)}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted);font-size:14px}
.card .more{display:inline-block;margin-top:16px;color:var(--accent);font-size:13px;font-weight:600}

.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:#fff;margin:12px 0 8px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#f1f5f9;font-weight:600;color:#334155;white-space:nowrap}
tr:last-child td{border-bottom:none}

.faq{display:grid;gap:12px}
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 18px}
summary{cursor:pointer;padding:16px 0;font-weight:600;list-style:none}
summary::-webkit-details-marker{display:none}
details p{margin:0 0 16px;color:#475569;font-size:14px}

.footer{background:#0b1220;color:#94a3b8;padding:44px 0 34px;font-size:13px}
.footer a:hover{color:#fff}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px}
.footer h4{color:#e2e8f0;font-size:13px;letter-spacing:1px;margin:0 0 12px}
.footer p{margin:0 0 8px}
.demo-note{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);color:#64748b;font-size:12px}

.breadcrumb{font-size:13px;color:var(--muted);padding:22px 0 0}
.breadcrumb a:hover{color:var(--accent)}
.page-head{padding:26px 0 8px}
.page-head h1{font-size:clamp(28px,3.6vw,42px);margin:12px 0 14px}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 8px}
.badge{font-size:12px;padding:5px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#475569}

.two-col{display:grid;grid-template-columns:1.35fr .65fr;gap:26px;align-items:start}
.quick-answer{background:#fff7ed;border:1px solid #fed7aa;border-radius:12px;padding:18px 20px;margin:22px 0}
.quick-answer b{color:#9a3412}
.article h2{font-size:22px;margin:34px 0 10px}
.article h3{font-size:17px;margin:24px 0 8px}
.article p{margin:0 0 14px;color:#334155}
.article ul{padding-left:20px;color:#334155}
.related{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.related a{font-size:13px;padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:#fff}
.related a:hover{border-color:var(--accent);color:var(--accent)}

.contact-box{background:#0f172a;color:#fff;border-radius:var(--radius);padding:28px}
.contact-box p{color:#cbd5e1;font-size:14px}
.contact-box a{color:#fdba74}
.form{display:grid;gap:10px;margin-top:16px}
.form input,.form textarea{
  width:100%;padding:10px 12px;border-radius:8px;border:1px solid #334155;
  background:#0b1220;color:#fff;font:inherit;font-size:14px;
}
.form button{margin-top:4px}

@media(max-width:860px){
  .grid{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr}
  .nav{display:none}
  .hero-inner{padding:64px 0 56px}
  .section{padding:52px 0}
}