:root{
  --primary:#0066ff;
  --primary-dark:#0047b3;
  --accent:#00d4aa;
  --bg-dark:#0b1020;
  --bg-panel:#111832;
  --bg-card:#ffffff;
  --text-dark:#1a2333;
  --text-light:#c9d3ee;
  --text-muted:#5a6b8c;
  --gradient: linear-gradient(135deg,#0066ff 0%,#00d4aa 100%);
  --shadow: 0 20px 40px rgba(0,0,0,0.08);
  --radius: 20px;
  --radius-sm: 12px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter','PingFang SC','Microsoft YaHei',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:#fff;color:var(--text-dark);line-height:1.6;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit;transition:all .2s}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(0,0,0,0.05)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--text-dark)}
.brand img{height:36px;width:auto}
.nav-links{display:flex;list-style:none;gap:28px}
.nav-links a{font-size:15px;font-weight:500;color:#3a4a6b;padding:8px 4px;position:relative}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:3px;background:var(--gradient);border-radius:3px}
.nav-links a:hover{color:var(--primary)}
.nav-actions{display:flex;align-items:center;gap:18px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 28px;border-radius:50px;font-weight:700;font-size:16px;transition:all .3s;border:none;cursor:pointer}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 8px 20px rgba(0,102,255,0.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,102,255,0.45)}
.btn-outline{background:transparent;border:2px solid var(--primary);color:var(--primary)}
/* Hero */
.hero{position:relative;overflow:hidden;background:var(--bg-dark);color:#fff;padding:80px 0 100px}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:0.25}
.hero-content{position:relative;z-index:1;text-align:center;max-width:820px;margin:0 auto}
.eyebrow{display:inline-block;background:rgba(255,255,255,0.12);border:1px solid rgba(255,255,255,0.25);padding:6px 18px;border-radius:50px;font-size:13px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:#cce0ff;margin-bottom:24px}
.hero h1{font-size:54px;line-height:1.15;font-weight:900;margin-bottom:24px;background:linear-gradient(135deg,#fff 30%,#a0c4ff 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero .tagline{font-size:20px;color:var(--text-light);max-width:640px;margin:0 auto 40px}
.hero-stats{display:flex;justify-content:center;gap:60px;margin-top:60px;flex-wrap:wrap}
.stat .num{font-size:44px;font-weight:800;color:#fff}
.stat .lbl{font-size:15px;color:#b8c7e0;margin-top:4px}
/* Sections */
section{padding:80px 0}
.panel-dark{background:var(--bg-dark);color:#fff}
.panel-dark .eyebrow{background:rgba(255,255,255,0.1);border-color:rgba(255,255,255,0.2)}
.panel-dark h2{color:#fff}
.panel-dark p{color:#c9d3ee}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-head h2{font-size:40px;font-weight:800;margin-bottom:16px;letter-spacing:-0.5px}
.section-head p{font-size:18px;color:var(--text-muted)}
/* 修复：深色背景下 section-head 段落文字颜色 */
.panel-dark .section-head p{color:#c9d3ee}
/* Features base */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{background:#fff;border-radius:var(--radius);padding:32px 24px;box-shadow:var(--shadow);transition:all .3s;border:1px solid rgba(0,0,0,0.04)}
.feature-card:hover{transform:translateY(-6px);border-color:var(--accent)}
.feature-card .ico{font-size:44px;margin-bottom:20px}
.feature-card h4{font-size:20px;font-weight:700;margin-bottom:12px}
.feature-card p{color:var(--text-muted);font-size:15px}
/* Enterprise specific */
.pain-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;margin-top:40px}
.pain-card{background:#fff;border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);transition:all .3s;border:1px solid rgba(0,0,0,0.04)}
.pain-card:hover{transform:translateY(-6px);border-color:var(--accent)}
.pain-card .ico{font-size:44px;margin-bottom:16px}
.pain-card h4{font-size:20px;margin-bottom:10px}
.pain-card p{color:var(--text-muted);font-size:15px}
.solution-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;margin-top:40px}
.solution-item{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);border-radius:var(--radius);padding:32px;transition:all .3s}
.solution-item:hover{background:rgba(255,255,255,0.12);transform:translateY(-4px)}
.solution-item .ico{font-size:48px;margin-bottom:16px}
.solution-item h4{color:#fff;font-size:22px;margin-bottom:12px}
.solution-item p{color:#c9d3ee;font-size:15px}
.deploy-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:40px}
.step-card{background:#fff;border-radius:var(--radius);padding:36px 24px;text-align:center;box-shadow:var(--shadow);position:relative}
.step-card .step-num{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:50%;background:var(--gradient);color:#fff;font-size:22px;font-weight:800;margin-bottom:20px}
.step-card h4{font-size:20px;margin-bottom:12px}
.step-card p{color:var(--text-muted);font-size:15px}
.security-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:40px}
.security-item{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);border-radius:var(--radius-sm);padding:24px;color:#c9d3ee;transition:all .3s}
.security-item:hover{background:rgba(255,255,255,0.12)}
.security-item h5{color:#fff;font-size:18px;margin-bottom:10px}
.security-item p{font-size:15px}
.scenario-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;margin-top:40px}
.scenario-card{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);border-radius:var(--radius);padding:32px;text-align:center;transition:all .3s}
.scenario-card:hover{background:rgba(255,255,255,0.12);transform:translateY(-4px)}
.scenario-card .ico{font-size:48px;margin-bottom:16px}
.scenario-card h4{color:#fff;font-size:20px;margin-bottom:10px}
.scenario-card p{color:#c9d3ee;font-size:15px}
/* FAQ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:900px;margin:0 auto}
.faq-item{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);border-radius:var(--radius-sm);padding:24px;text-align:left}
.faq-item h4{color:#fff;font-size:18px;margin-bottom:10px}
.faq-item p{color:#c9d3ee;font-size:15px}
/* Footer */
.site-footer{background:#080c18;color:#b8c7e0;padding:60px 0 20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand p{color:#8a9bb8;margin-top:16px;font-size:15px}
.footer-col h5{color:#fff;font-size:16px;margin-bottom:16px}
.footer-col a{display:block;color:#8a9bb8;font-size:15px;margin-bottom:10px}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:20px;text-align:center;font-size:14px;color:#6a7b9a}
/* Responsive */
@media (max-width: 992px){
  .nav-links{display:none}
  .hero h1{font-size:38px}
  .product-family,.features,.pain-grid,.solution-grid,.deploy-steps,.scenario-grid,.faq-grid{grid-template-columns:1fr}
  .hero-stats{gap:30px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width: 576px){
  .hero h1{font-size:30px}
  .stat .num{font-size:32px}
  .section-head h2{font-size:30px}
  .footer-grid{grid-template-columns:1fr}
}