:root{
  --bg:#07111f;
  --bg-deep:#030712;
  --bg-soft:#0b1629;
  --card:#0e1b31;
  --card-2:#101f39;
  --line:rgba(148,163,184,.18);
  --text:#e5eefc;
  --muted:#9fb0cc;
  --primary:#3b82f6;
  --primary-2:#60a5fa;
  --cyan:#22d3ee;
  --green:#34d399;
  --white:#ffffff;
  --shadow:0 20px 60px rgba(2,8,23,.45);
  --radius:20px;
  --radius-sm:14px;
  --max:1240px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:
    radial-gradient(circle at 20% 0%, rgba(59,130,246,.20), transparent 35%),
    radial-gradient(circle at 80% 20%, rgba(34,211,238,.12), transparent 25%),
    linear-gradient(180deg,#08111f 0%,#050b16 100%);
  color:var(--text);
  line-height:1.75;
  overflow-x:hidden;
  position: relative;
}

a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{padding-left:18px}
.container{width:min(var(--max),92%);margin:0 auto;position:relative;z-index:2}
.section{padding:96px 0}
.grid{display:grid;gap:24px}

/* 背景粒子层 */
html, body {
  min-height: 100%;
}

body {
  position: relative;
  z-index: 0;
}

.site-bg{
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
  overflow: hidden;
}

#bg-particles{
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw !important;
  height: 100vh !important;
  display: block;
}

.site-overlay{
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(circle at center, transparent 35%, rgba(0,0,0,.10) 100%),
    linear-gradient(180deg, rgba(3,7,18,.10) 0%, rgba(3,7,18,.18) 100%);
}

/* 卡片和通用模块 */
.card{
  background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.015));
  border:1px solid var(--line);
  backdrop-filter: blur(12px);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.small-card{
  background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.01));
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 14px;
  border:1px solid rgba(96,165,250,.24);
  border-radius:999px;
  color:#c9dcff;
  font-size:13px;
  letter-spacing:.5px;
  background:rgba(59,130,246,.08);
  margin-bottom:18px;
}
.eyebrow.center{
  display:table;
  margin:0 auto 16px;
}
.eyebrow::before{
  content:"";
  width:8px;
  height:8px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--cyan),var(--primary));
  box-shadow:0 0 18px rgba(34,211,238,.75);
}
.section-title{
  font-size:40px;
  line-height:1.2;
  font-weight:800;
  text-align:center;
  margin-bottom:16px;
  color:#f8fbff;
}
.section-subtitle{
  max-width:860px;
  margin:0 auto 48px;
  text-align:center;
  color:var(--muted);
  font-size:17px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 24px;
  border-radius:12px;
  font-size:15px;
  font-weight:700;
  transition:.3s ease;
  cursor:pointer;
  border:none;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  box-shadow:0 12px 28px rgba(59,130,246,.28);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.05)}
.btn-ghost{
  color:#dce9ff;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(148,163,184,.18);
}
.btn-ghost:hover{border-color:rgba(96,165,250,.45);color:#fff}
.text-muted{color:var(--muted)}
.text-center{text-align:center}
.mt-20{margin-top:20px}
.mt-30{margin-top:30px}
.mt-40{margin-top:40px}

/* 导航 */
header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(3,7,18,.65);
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(148,163,184,.12);
}
.nav{
  min-height:78px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.logo{
  display:flex;
  align-items:center;
  gap:12px;
  font-weight:800;
  font-size:22px;
  color:#fff;
  letter-spacing:.3px;
}
.logo-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  box-shadow:0 10px 30px rgba(59,130,246,.35);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:16px;font-weight:900;
}
.nav-menu{
  display:flex;align-items:center;gap:22px;
  color:#dbe7ff;font-size:15px;
  flex-wrap: wrap;
}
.nav-menu a{opacity:.88}
.nav-menu a:hover,.nav-menu a.active{color:#8ec5ff;opacity:1}
.nav-cta{
  display:flex;gap:12px;align-items:center;
}
.mobile-toggle{
  display:none;
  background:none;
  border:none;
  color:#fff;
  font-size:24px;
  cursor:pointer;
}

/* 首页 Hero */
.hero{
  position:relative;
  padding:84px 0 64px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 15% 18%, rgba(59,130,246,.10), transparent 22%),
    radial-gradient(circle at 88% 22%, rgba(34,211,238,.08), transparent 18%),
    radial-gradient(circle at 50% 110%, rgba(59,130,246,.10), transparent 36%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:34px;
  align-items:center;
}
.hero h1{
  font-size:58px;
  line-height:1.08;
  letter-spacing:-1.2px;
  margin-bottom:20px;
  color:#fff;
  font-weight:900;
}
.hero p{
  font-size:18px;
  color:#b9c9e5;
  max-width:760px;
  margin-bottom:26px;
}
.hero-tags{
  display:flex;flex-wrap:wrap;gap:12px;
  margin-bottom:30px;
}
.tag{
  padding:8px 14px;
  border-radius:999px;
  border:1px solid rgba(148,163,184,.18);
  background:rgba(255,255,255,.03);
  color:#d9e6fb;
  font-size:13px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:8px}

.hero-panel{
  padding:28px;
  min-height:480px;
  position:relative;
  overflow:hidden;
}
.hero-panel::after{
  content:"";
  position:absolute;
  right:-60px;top:-40px;
  width:220px;height:220px;
  background:radial-gradient(circle, rgba(96,165,250,.18), transparent 60%);
  border-radius:50%;
  pointer-events:none;
}
.signal{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
  margin-top:8px;
}
.signal-item{
  padding:18px;
  border-radius:16px;
  background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.01));
  border:1px solid rgba(148,163,184,.14);
}
.signal-item h4{font-size:14px;color:#dbeafe;margin-bottom:8px}
.signal-item p{font-size:13px;color:#98a9c5;margin:0}
.hero-metrics{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  margin-top:24px;
}
.metric{
  padding:18px;
  border-radius:16px;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(148,163,184,.14);
  text-align:center;
}
.metric strong{
  display:block;
  font-size:28px;
  color:#fff;
  margin-bottom:4px;
}
.metric span{
  color:#9ab0d0;
  font-size:13px;
}

/* 通用布局 */
.stats{padding-top:14px}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.stat{padding:26px 24px;text-align:left}
.stat h3{
  font-size:34px;
  color:#fff;
  margin-bottom:8px;
  font-weight:800;
}
.stat p{color:var(--muted);font-size:14px}

.about-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:24px;
  align-items:stretch;
}
.about-main,.about-side{padding:34px}
.about-main h3,.about-side h3{
  font-size:24px;
  margin-bottom:14px;
  color:#fff;
}
.about-main p,.about-side p,.about-side li{color:var(--muted);font-size:15px}
.timeline{
  margin-top:22px;
  display:grid;
  gap:14px;
}
.timeline-item{
  padding:18px 18px 18px 20px;
  border-left:3px solid var(--primary-2);
  background:rgba(255,255,255,.02);
  border-radius:0 14px 14px 0;
}
.timeline-item strong{
  color:#fff;
  display:block;
  margin-bottom:4px;
  font-size:15px;
}
.timeline-item span{color:var(--muted);font-size:14px}

.business-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.business-card{
  padding:28px;
  transition:.3s ease;
  position:relative;
  overflow:hidden;
}
.business-card:hover{
  transform:translateY(-6px);
  border-color:rgba(96,165,250,.34);
  box-shadow:0 24px 50px rgba(2,8,23,.48);
}
.business-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(96,165,250,.6),transparent);
}
.business-icon{
  width:54px;height:54px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(59,130,246,.20),rgba(34,211,238,.12));
  border:1px solid rgba(96,165,250,.2);
  font-size:24px;
  margin-bottom:18px;
}
.business-card h3{
  font-size:22px;
  margin-bottom:10px;
  color:#fff;
}
.business-card p{
  color:var(--muted);
  font-size:15px;
  margin-bottom:14px;
}
.business-card ul{
  padding-left:18px;
  color:#9fb0cc;
  font-size:14px;
}

.solution-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:22px;
}
.solution-card{
  padding:30px;
  background:
    linear-gradient(180deg,rgba(59,130,246,.08),rgba(255,255,255,.02)),
    linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,.01));
  border:1px solid rgba(96,165,250,.18);
  border-radius:20px;
}
.solution-card h3{
  color:#fff;
  font-size:23px;
  margin-bottom:10px;
}
.solution-card p{
  color:var(--muted);
  margin-bottom:12px;
  font-size:15px;
}
.solution-card ul{
  padding-left:18px;
  color:#afc0da;
  font-size:14px;
}

.ai-section{
  background:
    radial-gradient(circle at 15% 50%, rgba(34,211,238,.06), transparent 22%),
    radial-gradient(circle at 90% 0%, rgba(59,130,246,.08), transparent 24%);
}
.ai-grid{
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:22px;
}
.ai-card{padding:28px}
.ai-card h3{
  color:#fff;
  font-size:21px;
  margin-bottom:10px;
}
.ai-card p{
  color:var(--muted);
  font-size:15px;
  margin-bottom:10px;
}

.customer-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.customer-item{
  padding:24px 20px;
  text-align:center;
  color:#d9e6fb;
  font-size:15px;
}

.case-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.case-card{padding:28px}
.case-card h3{
  font-size:21px;
  color:#fff;
  margin-bottom:10px;
}
.case-card p{
  color:var(--muted);
  font-size:15px;
  margin-bottom:12px;
}
.case-tag-wrap{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.case-tag{
  font-size:12px;
  color:#d8e8ff;
  padding:6px 10px;
  border-radius:999px;
  background:rgba(59,130,246,.10);
  border:1px solid rgba(96,165,250,.16);
}

.adv-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.adv-item{padding:26px}
.adv-item h3{
  color:#fff;
  font-size:18px;
  margin-bottom:10px;
}
.adv-item p{
  color:var(--muted);
  font-size:14px;
}

.cta{
  padding:38px;
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:20px;
  align-items:center;
  background:
    linear-gradient(135deg, rgba(59,130,246,.18), rgba(34,211,238,.10)),
    rgba(255,255,255,.02);
  border:1px solid rgba(96,165,250,.18);
}
.cta h2{
  font-size:34px;
  line-height:1.2;
  margin-bottom:12px;
  color:#fff;
}
.cta p{
  color:#bdd0ef;
  font-size:16px;
}
.cta-actions{
  display:flex;
  gap:14px;
  justify-content:flex-end;
  flex-wrap:wrap;
}

.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.contact-card{padding:32px}
.contact-card h3{
  color:#fff;
  font-size:24px;
  margin-bottom:14px;
}
.contact-card p,.contact-card li{
  color:var(--muted);
  font-size:15px;
}
.contact-list{
  display:grid;
  gap:14px;
  margin-top:20px;
}
.contact-list .item{
  padding:16px 18px;
  background:rgba(255,255,255,.02);
  border:1px solid rgba(148,163,184,.12);
  border-radius:14px;
}
form{
  display:grid;
  gap:14px;
  margin-top:16px;
}
input,textarea{
  width:100%;
  border:none;
  outline:none;
  padding:15px 16px;
  border-radius:12px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(148,163,184,.14);
  color:#fff;
  font-size:15px;
}
input::placeholder,textarea::placeholder{color:#7f94b5}
input:focus,textarea:focus{
  border-color:rgba(96,165,250,.55);
  box-shadow:0 0 0 4px rgba(59,130,246,.10);
}
textarea{min-height:140px;resize:vertical}

.page-hero{
  padding:72px 0 40px;
}
.page-hero .page-title{
  font-size:48px;
  line-height:1.15;
  font-weight:900;
  margin-bottom:16px;
  text-align:center;
}
.page-hero .page-desc{
  max-width:860px;
  margin:0 auto;
  text-align:center;
  color:var(--muted);
  font-size:17px;
}

/* 页脚 */
footer{
  position: relative;
  z-index: 2;
  border-top:1px solid rgba(148,163,184,.12);
  padding:30px 0 18px;
  color:#8ea2c2;
  font-size:14px;
  background:rgba(2,6,15,.68);
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap:18px;
  flex-wrap:wrap;
}
.footer-brand{
  max-width: 420px;
}
.footer-brand h4{
  color:#fff;
  font-size:18px;
  margin-bottom:8px;
}
.footer-brand p{
  color:#8ea2c2;
  font-size:14px;
}
.footer-links{
  display:grid;
  gap:8px;
}
.footer-links a{
  color:#9fb0cc;
}
.footer-links a:hover{
  color:#d9e8ff;
}
.footer-contact{
  display:grid;
  gap:6px;
  color:#9fb0cc;
}
.footer-records{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid rgba(148,163,184,.12);
  display:flex;
  flex-wrap:wrap;
  gap:14px 24px;
  color:#8ea2c2;
  font-size:13px;
}
.footer-records a:hover{
  color:#d9e8ff;
}

/* 404 */
.notfound-wrap{
  min-height: calc(100vh - 140px);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:60px 0;
  position: relative;
  z-index: 2;
}
.notfound-card{
  width:min(760px, 92%);
  padding:44px;
  text-align:center;
}
.notfound-code{
  font-size:96px;
  line-height:1;
  font-weight:900;
  margin-bottom:14px;
  background:linear-gradient(135deg, #60a5fa, #22d3ee);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.notfound-title{
  font-size:32px;
  color:#fff;
  font-weight:800;
  margin-bottom:14px;
}
.notfound-desc{
  color:var(--muted);
  font-size:16px;
  margin-bottom:24px;
}
.notfound-actions{
  display:flex;
  justify-content:center;
  gap:14px;
  flex-wrap:wrap;
}

/* 响应式 */
@media (max-width: 1100px){
  .hero-grid,.about-grid,.cta,.contact-grid{grid-template-columns:1fr}
  .business-grid,.adv-grid,.customer-grid,.stats-grid,.ai-grid,.solution-grid,.case-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:48px}
  .cta-actions{justify-content:flex-start}
}
@media (max-width: 760px){
  .nav-menu,.nav-cta{display:none}
  .mobile-toggle{display:block}
  .nav.mobile-open{
    flex-wrap:wrap;
    padding:14px 0;
  }
  .nav.mobile-open .nav-menu{
    display:flex;
    width:100%;
    flex-direction:column;
    align-items:flex-start;
    gap:14px;
    padding:12px 0 4px;
  }
  .nav.mobile-open .nav-cta{
    display:flex;
    width:100%;
    justify-content:flex-start;
    margin-top:6px;
  }

  .business-grid,.adv-grid,.customer-grid,.stats-grid,.ai-grid,.solution-grid,.signal,.hero-metrics,.case-grid{grid-template-columns:1fr}
  .section{padding:76px 0}
  .hero{padding:64px 0 40px}
  .hero h1{font-size:38px}
  .section-title{font-size:30px}
  .page-hero .page-title{font-size:34px}
  .about-main,.about-side,.business-card,.solution-card,.contact-card,.hero-panel,.cta,.case-card,.notfound-card{padding:24px}
  .footer-inner{grid-template-columns:1fr}
}