:root{
  --brand:#0e5cff;
  --brand-dark:#0a3fb0;
  --ink:#101828;
  --ink-2:#475467;
  --line:#e4e7ec;
  --bg:#ffffff;
  --bg-alt:#f7f9fc;
  --radius:14px;
  --container:1140px;
}

*{box-sizing:border-box}

html{scroll-behavior:smooth}

body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}

a{color:inherit;text-decoration:none}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}

/* header */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.9);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:68px;
  gap:16px;
}

.brand{display:flex;align-items:center;gap:10px;font-weight:700}

.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;height:38px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--brand),#3f8bff);
  color:#fff;
  font-size:14px;
  letter-spacing:1px;
}

.brand-text{font-size:16px;letter-spacing:.5px}

.site-nav{display:flex;gap:28px;font-size:15px;color:var(--ink-2)}
.site-nav a{position:relative;padding:6px 0;transition:color .2s}
.site-nav a:hover{color:var(--brand)}
.site-nav a::after{
  content:"";
  position:absolute;left:0;bottom:0;
  width:0;height:2px;background:var(--brand);
  transition:width .25s;
}
.site-nav a:hover::after{width:100%}

.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:40px;height:40px;
  border:1px solid var(--line);
  border-radius:10px;
  background:#fff;
  cursor:pointer;
}
.nav-toggle span{display:block;height:2px;width:18px;margin:0 auto;background:var(--ink)}

/* hero */
.hero{
  position:relative;
  padding:96px 0 88px;
  background:
    radial-gradient(900px 420px at 85% -10%,rgba(14,92,255,.14),transparent 60%),
    radial-gradient(700px 380px at 5% 10%,rgba(63,139,255,.10),transparent 60%),
    var(--bg-alt);
  border-bottom:1px solid var(--line);
}

.hero-inner{max-width:820px}

.hero-eyebrow{
  display:inline-block;
  margin:0 0 18px;
  padding:6px 14px;
  border-radius:999px;
  background:rgba(14,92,255,.10);
  color:var(--brand-dark);
  font-size:13px;
  letter-spacing:.5px;
}

.hero h1{
  margin:0 0 20px;
  font-size:clamp(28px,4.4vw,46px);
  line-height:1.28;
  letter-spacing:.5px;
}

.hero-desc{
  margin:0 0 32px;
  max-width:720px;
  font-size:16px;
  color:var(--ink-2);
}

.hero-actions{display:flex;flex-wrap:wrap;gap:14px}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:46px;
  padding:0 26px;
  border-radius:10px;
  font-size:15px;
  transition:transform .15s,box-shadow .2s,background .2s,color .2s;
}

.btn-primary{
  background:var(--brand);
  color:#fff;
  box-shadow:0 8px 20px rgba(14,92,255,.24);
}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}

.btn-ghost{
  background:#fff;
  color:var(--ink);
  border:1px solid var(--line);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}

/* sections */
.section{padding:78px 0}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

.section-head{margin-bottom:44px;max-width:760px}

.section-tag{
  display:inline-block;
  margin-bottom:10px;
  color:var(--brand);
  font-size:13px;
  font-weight:600;
  letter-spacing:2px;
}

.section-head h2{
  margin:0;
  font-size:clamp(22px,2.8vw,32px);
  line-height:1.35;
}

/* about */
.about-grid{
  display:grid;
  grid-template-columns:1.4fr .9fr;
  gap:40px;
  align-items:start;
}

.about-text p{margin:0 0 16px;color:var(--ink-2)}

.about-points{
  margin:22px 0 0;
  padding:0;
  list-style:none;
}
.about-points li{
  position:relative;
  padding-left:24px;
  margin-bottom:10px;
  color:var(--ink);
}
.about-points li::before{
  content:"";
  position:absolute;left:0;top:11px;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--brand);
}

.about-facts{
  display:grid;
  gap:14px;
  padding:26px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:0 10px 30px rgba(16,24,40,.05);
}
.fact{display:flex;flex-direction:column;gap:4px}
.fact strong{font-size:13px;color:var(--ink-2);font-weight:600}
.fact span{font-size:15px;font-weight:600}

/* cards */
.cards{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}

.card{
  padding:26px 22px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(14,92,255,.35);
  box-shadow:0 16px 34px rgba(16,24,40,.08);
}

.card-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;height:40px;
  margin-bottom:14px;
  border-radius:10px;
  background:rgba(14,92,255,.10);
  color:var(--brand);
  font-weight:700;
  font-size:14px;
}

.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--ink-2);font-size:14.5px}

/* advantages */
.adv-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.adv-item{
  padding-left:18px;
  border-left:2px solid var(--brand);
}
.adv-item h3{margin:0 0 6px;font-size:17px}
.adv-item p{margin:0;color:var(--ink-2);font-size:14.5px}

/* contact */
.section-contact{background:var(--bg-alt);border-top:1px solid var(--line)}

.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}

.contact-card{
  padding:30px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.contact-card h3{margin:0 0 18px;font-size:18px}

.contact-list{
  margin:0;
  padding:0;
  list-style:none;
}
.contact-list li{
  display:flex;
  gap:16px;
  padding:12px 0;
  border-bottom:1px dashed var(--line);
  font-size:15px;
}
.contact-list li:last-child{border-bottom:none}
.contact-list span{flex:0 0 84px;color:var(--ink-2)}
.contact-list b{font-weight:600}

.contact-note{margin:18px 0 0;font-size:14px;color:var(--ink-2)}

.steps{
  margin:0;
  padding-left:20px;
  color:var(--ink-2);
}
.steps li{margin-bottom:12px}
.steps li:last-child{margin-bottom:0}
.steps b{color:var(--ink)}

/* footer */
.site-footer{
  padding:38px 0;
  background:#0c1220;
  color:#c3cad6;
  font-size:14px;
}
.footer-inner{
  display:flex;
  flex-wrap:wrap;
  gap:20px;
  justify-content:space-between;
  align-items:center;
}
.footer-brand strong{display:block;color:#fff;font-size:15px;margin-bottom:4px}
.footer-brand p{margin:0;font-size:13.5px;color:#98a2b3}
.footer-meta{text-align:right;font-size:13.5px}
.footer-meta p{margin:0 0 4px}
.footer-meta a{color:#c3cad6;transition:color .2s}
.footer-meta a:hover{color:#fff}
.dot{margin:0 8px;color:#5c6879}

/* responsive */
@media (max-width:992px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr}
}

@media (max-width:768px){
  .nav-toggle{display:flex}
  .site-nav{
    position:absolute;
    top:68px;left:0;right:0;
    flex-direction:column;
    gap:0;
    padding:8px 24px 16px;
    background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:0 12px 24px rgba(16,24,40,.08);
    display:none;
  }
  .site-nav.open{display:flex}
  .site-nav a{padding:12px 0;border-bottom:1px solid var(--line)}
  .site-nav a:last-child{border-bottom:none}

  .hero{padding:64px 0 60px}
  .section{padding:56px 0}
  .contact-grid{grid-template-columns:1fr}
  .footer-inner{flex-direction:column;align-items:flex-start}
  .footer-meta{text-align:left}
}

@media (max-width:480px){
  .cards,.adv-grid{grid-template-columns:1fr}
  .brand-text{font-size:14.5px}
}