:root{
  --bg:#0b1220;
  --card:#101a2f;
  --text:#eaf0ff;
  --muted:#a9b6d3;
  --line:rgba(255,255,255,.10);
  --primary:#6aa9ff;
  --primary2:#7cf3d0;
  --shadow: 0 18px 60px rgba(0,0,0,.35);
  --radius:18px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC","Microsoft YaHei", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% 0%, rgba(106,169,255,.25), transparent 60%),
              radial-gradient(900px 500px at 90% 10%, rgba(124,243,208,.18), transparent 55%),
              var(--bg);
  color:var(--text);
}

a{color:inherit; text-decoration:none;}
.container{width:min(1100px, 92%); margin:0 auto;}

.header{
  position:sticky; top:0; z-index:50;
  backdrop-filter: blur(12px);
  background: rgba(11,18,32,.70);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
}

.brand{display:flex; align-items:center; gap:10px; font-weight:800;}
.brand-dot{
  width:12px; height:12px; border-radius:99px;
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  box-shadow: 0 0 0 6px rgba(106,169,255,.10);
}
.brand-text{letter-spacing:.5px;}

.nav{display:flex; gap:18px; align-items:center;}
.nav a{
  padding:10px 12px;
  border-radius:12px;
  color:var(--muted);
}
.nav a:hover{background: rgba(255,255,255,.06); color:var(--text);}
.nav-toggle{
  display:none;
  background: rgba(255,255,255,.06);
  border:1px solid var(--line);
  color:var(--text);
  border-radius:12px;
  padding:8px 12px;
  cursor:pointer;
}

.section{padding:70px 0;}
.section.alt{
  background: linear-gradient(180deg, rgba(255,255,255,.05), transparent 80%);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}

.section-head{margin-bottom:22px;}
.section-head h2{margin:0 0 10px; font-size:28px;}
.section-head p{margin:0; color:var(--muted); line-height:1.8;}

.hero{padding:70px 0 50px;}
.hero-grid{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap:26px;
  align-items:center;
}
.hero-text h1{
  font-size:42px;
  line-height:1.12;
  margin:0 0 14px;
}
.lead{color:var(--muted); line-height:1.9; margin:0 0 20px;}

.hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin-bottom:14px;}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 16px;
  border-radius:14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.06);
  color:var(--text);
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
}
.btn.primary{
  border-color: rgba(106,169,255,.45);
  background: linear-gradient(135deg, rgba(106,169,255,.28), rgba(124,243,208,.18));
}
.btn.ghost{background: transparent;}
.btn:hover{transform: translateY(-1px); transition: .18s ease;}

.badges{display:flex; gap:10px; flex-wrap:wrap;}
.badge{
  font-size:13px;
  color:var(--muted);
  padding:8px 10px;
  border:1px solid var(--line);
  border-radius:999px;
  background: rgba(255,255,255,.04);
}

.hero-media img{
  width:100%;
  border-radius: var(--radius);
  border:1px solid var(--line);
  box-shadow: var(--shadow);
}

.card{
  border:1px solid var(--line);
  background: rgba(16,26,47,.78);
  border-radius: var(--radius);
  padding:18px 18px;
  box-shadow: 0 14px 50px rgba(0,0,0,.28);
}

.about-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:16px;
  align-items:stretch;
}
.about-media{display:flex; align-items:center; justify-content:center;}
.about-media img{width:100%; border-radius: var(--radius); border:1px solid var(--line);}

.list{margin:12px 0 0; padding-left:18px; color:var(--muted); line-height:1.9;}
.timeline .timeline-item{
  display:flex; gap:12px; align-items:flex-start;
  padding:12px 0;
  border-top:1px dashed rgba(255,255,255,.10);
}
.timeline .timeline-item:first-of-type{border-top:none;}
.timeline .dot{
  width:10px; height:10px; border-radius:99px;
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  margin-top:6px;
}
.time{font-weight:700;}
.desc{color:var(--muted); line-height:1.7;}

.products-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:16px;
}
.product img{
  width:44px; height:44px;
  margin-bottom:10px;
}
.product h3{margin:6px 0 8px;}
.product p{margin:0; color:var(--muted); line-height:1.8;}
.full{grid-column: 1 / -1;}
.muted{color:var(--muted);}

.contact-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:16px;
}
.kv{margin:8px 0; color:var(--muted); line-height:1.8;}
.kv span:first-child{display:inline-block; min-width:90px; color:var(--text);}
.tip{margin-top:10px; color:var(--muted); font-size:13px; line-height:1.7;}

.mini-faq h4{margin:12px 0 10px;}
details{
  border:1px solid rgba(255,255,255,.10);
  border-radius:14px;
  padding:10px 12px;
  margin:10px 0;
  background: rgba(255,255,255,.04);
}
summary{cursor:pointer; color:var(--text);}
details p{margin:8px 0 0; color:var(--muted); line-height:1.8;}

.footer{
  border-top:1px solid var(--line);
  padding:22px 0;
  color:var(--muted);
}
.footer-inner{display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap;}
.footer-links a{color:var(--muted); margin-left:12px;}
.footer-links a:hover{color:var(--text);}

/* 移动端适配 */
@media (max-width: 860px){
  .hero-grid{grid-template-columns:1fr; }
  .about-grid{grid-template-columns:1fr;}
  .products-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .nav{display:none; position:absolute; right:4%; top:58px; flex-direction:column; width:220px;
       background: rgba(11,18,32,.92); border:1px solid var(--line); border-radius:16px; padding:10px;}
  .nav a{width:100%;}
  .nav-toggle{display:inline-flex;}
  .nav.open{display:flex;}
  .hero-text h1{font-size:34px;}
}