:root{
  --bg:#0d1118;
  --bg2:#121824;
  --panel:#171f2c;
  --panel-2:#1d2736;
  --ink:#f1f4f7;
  --muted:#b8c1cd;
  --amber:#e0b15e;
  --rose:#df6b67;
  --line:rgba(255,255,255,.10);
  --shell:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{
  margin:0;
  font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;
  background:
    radial-gradient(circle at 15% 0%, rgba(224,177,94,.13), transparent 28%),
    radial-gradient(circle at 100% 15%, rgba(223,107,103,.12), transparent 28%),
    linear-gradient(180deg,#0b1017 0,#101722 100%);
  color:var(--ink);
  line-height:1.75;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
button{font:inherit;color:inherit}
p,h1,h2,h3,figure{margin-top:0}
.site-shell{width:min(calc(100% - 44px),var(--shell));margin:auto}
.skip-link{
  position:fixed;left:12px;top:10px;z-index:9999;
  padding:8px 12px;background:var(--amber);color:#18212a;
  transform:translateY(-160%)
}
.skip-link:focus{transform:none}
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(13,17,24,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
}
.header-row{
  min-height:70px;
  display:grid;
  grid-template-columns:auto 1fr auto;
  gap:24px;
  align-items:center;
}
.brand{display:flex;align-items:center;gap:14px}
.brand img{width:42px;height:42px;border-radius:11px}
.brand span{font-size:12px;font-weight:800;letter-spacing:.12em;color:#aab4c1}
.site-nav{display:flex;justify-content:center;gap:22px}
.site-nav a{font-size:13px;font-weight:800;color:#c9d1db}
.top-cta{
  min-height:42px;padding:0 16px;
  display:flex;align-items:center;
  background:var(--amber);color:#18212a;
  font-size:13px;font-weight:900;
}
.menu-toggle{display:none}
.menu-toggle span{width:18px;height:1px;background:#d9e0e8}
.hero{padding:54px 0 60px}
.hero-grid{display:grid;grid-template-columns:.88fr 1.12fr;gap:44px;align-items:center;min-height:560px}
.eyebrow{margin:0 0 12px;color:var(--amber);font-size:10px;font-weight:900;letter-spacing:.18em}
.hero h1,.section-head h2,.faq-shell h2{
  margin:0 0 14px;
  font-size:clamp(40px,5.4vw,78px);
  line-height:.98;
  letter-spacing:-.06em;
}
.lead,.section-head p,.rail-cards p,.route-copy p,.faq-list p,.footer-brand p{color:var(--muted)}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0 24px}
.primary,.secondary,.section-cta{
  min-height:50px;padding:0 18px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:900;
}
.primary,.section-cta{background:var(--amber);color:#18212a}
.secondary{background:rgba(255,255,255,.04);border:1px solid var(--line)}
.hero-strip{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:10px;
}
.hero-strip div{
  padding:14px 16px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
}
.hero-strip strong{display:block;margin-bottom:6px;font-size:12px;letter-spacing:.12em}
.hero-strip span{font-size:13px;color:#9fa9b5}
.hero-panel{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.panel-figure{
  margin:0;
  padding:16px;
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
}
.panel-figure img{width:100%;height:100%;min-height:260px;object-fit:cover;border-radius:14px}
.panel-figure figcaption{padding-top:10px;color:#95a1b1;font-size:11px}
.panel-large{grid-row:span 2}
.panel-large img{min-height:540px}
.panel-grid{display:grid;gap:12px}
.section{padding:84px 0}
.section-rail{background:rgba(255,255,255,.02)}
.section-tone{background:linear-gradient(180deg,#0f1620 0,#141d2a 100%)}
.section-head{max-width:820px;margin-bottom:28px}
.section-head h2{font-size:clamp(30px,3.8vw,44px);line-height:1.15}
.section-head.narrow{max-width:760px}
.rail-grid{
  display:grid;
  grid-template-columns:.76fr 1.24fr;
  gap:54px;
  align-items:center;
}
.rail-cards{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.rail-cards article{
  padding:22px;
  background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--line);
  min-height:170px;
}
.rail-cards span{display:inline-flex;margin-bottom:16px;color:var(--rose);font-size:10px;font-weight:900;letter-spacing:.14em}
.rail-cards h3{margin:0 0 10px;font-size:18px}
.route-grid{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:38px;
  align-items:center;
}
.route-images{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.route-images figure{
  margin:0;
  padding:16px;
  background:var(--panel);
  border:1px solid var(--line);
}
.route-images img{
  width:100%;
  height:290px;
  object-fit:contain;
  background:#0b1119;
}
.route-images figcaption{padding-top:10px;color:#97a2b0;font-size:11px}
.section-cta{margin-top:4px}
.preview-grid{
  display:grid;
  grid-template-columns:1fr 1.1fr 1fr;
  gap:12px;
}
.preview-card{
  margin:0;
  padding:16px;
  background:var(--panel);
  border:1px solid var(--line);
}
.preview-card img{
  width:100%;
  height:300px;
  object-fit:contain;
  background:#0b1119;
}
.preview-card-wide img{height:360px}
.preview-card figcaption{padding-top:10px;color:#97a2b0;font-size:11px}
.faq-shell{display:grid;gap:28px}
.faq-list{
  display:grid;
  gap:10px;
}
.faq-list details{
  padding:0 18px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
}
.faq-list summary{
  min-height:76px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  cursor:pointer;
  font-size:15px;
  font-weight:800;
}
.faq-list summary span{color:var(--amber)}
.faq-list p{padding:0 0 16px;margin:0}
.footer{
  padding:34px 0 20px;
  background:#091018;
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr auto;
  gap:24px;
  align-items:center;
  padding-bottom:18px;
  border-bottom:1px solid var(--line);
}
.footer-brand img{width:44px;height:44px;border-radius:12px;margin-bottom:10px}
.footer-links{display:flex;flex-wrap:wrap;gap:14px}
.footer-links a{font-size:12px;color:#c9d1db}
.footer-bottom{
  min-height:54px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  color:#95a1af;
  font-size:11px;
}
@media (max-width: 980px){
  .site-nav{display:none}
  .menu-toggle{
    width:42px;height:42px;padding:0;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;
    border:1px solid var(--line);background:transparent;
  }
  .hero-grid,.rail-grid,.route-grid,.preview-grid,.footer-grid{grid-template-columns:1fr}
  .hero-panel{grid-template-columns:1fr 1fr}
}
@media (max-width: 720px){
  .hero{padding:38px 0 54px}
  .hero h1{font-size:42px}
  .hero-panel,.rail-cards{grid-template-columns:1fr}
  .panel-figure img,.preview-card img,.route-images img{height:240px;min-height:240px}
  .panel-large img{min-height:240px}
  .preview-card-wide img{height:280px}
}
@media (max-width: 560px){
  html{scroll-padding-top:68px}
  .site-shell{width:min(calc(100% - 36px),var(--shell))}
  .header-row{min-height:64px;gap:12px}
  .brand span{font-size:10px}
  .top-cta{display:none}
  .hero-strip{grid-template-columns:1fr}
  .section{padding:68px 0}
  .rail-cards article,.route-images figure,.preview-card{padding:18px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}