:root{
  --bg:#f5f8fc;
  --card:#ffffff;
  --ink:#12233d;
  --muted:#5d6f87;
  --primary:#123d73;
  --primary-2:#0d2b52;
  --accent:#ea5b2a;
  --accent-2:#ff8f52;
  --line:#d8e2ef;
  --success:#0f766e;
  --shadow:0 18px 40px rgba(18,35,61,.08);
  --radius:18px;
  --container:min(1180px, calc(100vw - 32px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:linear-gradient(180deg,#f6f9fd 0%,#eef4fb 100%);
  line-height:1.75;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:none}
img{max-width:100%;display:block}
.container{width:var(--container);margin:0 auto}
.site-header{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(14px);
  background:rgba(255,255,255,.92);
  border-bottom:1px solid rgba(216,226,239,.85);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:20px}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink)}
.brand-mark{
  width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),#28599a);
  color:#fff;font-weight:800;font-size:24px;box-shadow:var(--shadow)
}
.brand-text strong{display:block;font-size:17px}
.brand-text small{display:block;color:var(--muted);letter-spacing:.08em}
.main-nav{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.main-nav a{font-size:14px;color:var(--ink)}
.main-nav .nav-phone{
  background:var(--accent);color:#fff;padding:10px 14px;border-radius:999px;font-weight:700
}
.hero{
  background:
    radial-gradient(circle at top right, rgba(234,91,42,.18), transparent 30%),
    radial-gradient(circle at top left, rgba(18,61,115,.16), transparent 32%);
  padding:38px 0 22px;
}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:14px}
.breadcrumb a{color:var(--muted)}
h1{font-size:clamp(30px,4vw,48px);line-height:1.18;margin:0 0 12px}
.hero-intro{
  max-width:920px;
  font-size:18px;
  color:#2c405d;
  margin:0 0 22px;
}
.hero-cta-row{display:flex;flex-wrap:wrap;gap:12px}
.contact-strip{padding:0 0 12px}
.contact-strip-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px 18px;
  box-shadow:var(--shadow)
}
.contact-strip-copy{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center}
.contact-strip-copy strong{font-size:15px}
.contact-strip-copy a{color:var(--accent)}
.contact-strip-copy span{color:var(--muted);font-size:14px}
.contact-strip-actions{display:flex;gap:10px;flex-wrap:wrap}
.contact-strip-actions a{
  display:inline-flex;align-items:center;justify-content:center;min-height:40px;
  padding:0 14px;border-radius:999px;border:1px solid var(--line);background:#f8fbff;font-weight:700
}
.contact-strip-actions a:first-child{background:var(--accent);border-color:var(--accent);color:#fff}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:0 18px;border-radius:999px;font-weight:700;border:1px solid transparent
}
.btn-primary{background:var(--accent);color:#fff}
.btn-secondary{background:var(--primary);color:#fff}
.btn-outline{background:#fff;border-color:var(--line);color:var(--primary)}
.content-section{padding:28px 0}
.section-head{margin-bottom:18px}
.section-head h2,.prose h2,.faq-section h2,.related-section h2,.cta-panel h2{font-size:clamp(24px,3vw,34px);line-height:1.25;margin:0 0 12px}
.section-head p{margin:0;color:var(--muted)}
.prose{
  background:var(--card);padding:28px;border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow)
}
.prose p{margin:0 0 16px}
.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:18px;
}
.card-link{
  display:block;background:var(--card);padding:22px;border-radius:var(--radius);
  border:1px solid var(--line);box-shadow:var(--shadow);min-height:100%
}
.card-link h3{margin:0 0 10px;font-size:20px;line-height:1.3}
.card-link p{margin:0;color:var(--muted)}
.cta-panel{padding:30px 0 42px}
.cta-grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:22px;
  background:linear-gradient(135deg,#0e2f5a,#153d71 65%,#1f5797);
  color:#fff;padding:28px;border-radius:24px;box-shadow:var(--shadow)
}
.icon-list{padding-left:18px;margin:10px 0 0}
.lead-form{
  background:#fff;color:var(--ink);padding:20px;border-radius:20px;
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px
}
.lead-form label{display:flex;flex-direction:column;font-weight:600;font-size:14px;gap:8px}
.lead-form label:last-of-type{grid-column:1/-1}
.lead-form input,.lead-form textarea{
  width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;
  font:inherit;background:#f8fbff
}
.lead-form button{grid-column:1/-1}
.form-note{grid-column:1/-1;margin:0;color:var(--muted);font-size:12px}
.faq-list{display:grid;gap:14px}
.faq-list details{
  background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px 18px;box-shadow:var(--shadow)
}
.faq-list summary{font-weight:700;cursor:pointer}
.faq-answer p{margin:12px 0 0;color:var(--muted)}
.related-links{display:flex;flex-wrap:wrap;gap:10px}
.related-links a{
  background:#fff;border:1px solid var(--line);padding:10px 14px;border-radius:999px;
  box-shadow:var(--shadow);font-size:14px
}
.site-footer{
  background:#0b1d37;color:#d9e6f6;padding:40px 0 96px;margin-top:26px
}
.footer-grid{
  display:grid;grid-template-columns:1.2fr 1fr 1fr 1.2fr;gap:24px
}
.site-footer h3{margin:0 0 12px;color:#fff}
.footer-links{display:flex;flex-wrap:wrap;gap:10px}
.footer-links a{color:#d9e6f6;background:rgba(255,255,255,.06);padding:8px 12px;border-radius:999px}
.footer-contact a{color:#fff}
.mobile-cta-bar{
  position:fixed;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(3,1fr);
  background:rgba(11,29,55,.96);backdrop-filter:blur(10px);z-index:80
}
.mobile-cta-bar a{
  color:#fff;text-align:center;padding:13px 10px;font-weight:700;border-right:1px solid rgba(255,255,255,.12)
}
.mobile-cta-bar a:last-child{border-right:none;background:var(--accent)}
.wechat-qr{max-width:220px;border-radius:20px;box-shadow:var(--shadow);border:1px solid var(--line)}
.split-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px}
@media (max-width:980px){
  .cta-grid,.split-grid,.footer-grid{grid-template-columns:1fr}
  .lead-form{grid-template-columns:1fr}
  .contact-strip-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:760px){
  .nav-wrap{align-items:flex-start;flex-direction:column}
  .main-nav{width:100%}
  .main-nav a{font-size:13px}
  .hero{padding-top:26px}
  .card-grid{grid-template-columns:1fr}
  body{padding-bottom:68px}
}