:root {
  --navy: #0d1822;
  --blue: #0b4f86;
  --muted: #5f6f7e;
  --line: #dce4ec;
  --soft: #f3f6f9;
  --gold: #f4b400;
  --white: #fff;
  --shadow: 0 14px 34px rgba(13, 24, 34, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--navy);
  background: #fff;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
.wrap { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.topbar { background: var(--navy); color: #fff; font-size: 14px; }
.topbar .wrap,
.navbar .wrap { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.topbar .wrap { padding: 10px 0; }
.navbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 24px rgba(13, 24, 34, 0.06);
}
.navbar .wrap { padding: 16px 0; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo-box {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: #fff;
  box-shadow: 0 8px 18px rgba(13, 24, 34, 0.08);
  overflow: hidden;
}
.logo-box img { width: 32px; height: 32px; object-fit: contain; }
.brand-title { display: block; font-weight: 800; font-size: 20px; }
.brand-subtitle { display: block; color: var(--muted); font-size: 13px; }
.navlinks { display: flex; align-items: center; gap: 24px; font-weight: 700; }
.navlinks a { white-space: nowrap; }
.quote-btn,
.solid-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gold);
  color: #101820;
  border: 0;
  border-radius: 4px;
  padding: 14px 22px;
  font-weight: 900;
}
.outline-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--navy);
  border-radius: 4px;
  padding: 13px 22px;
  font-weight: 900;
}
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 14px;
}
.breadcrumbs a { color: var(--blue); font-weight: 800; }
.eyebrow {
  color: var(--gold);
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 13px;
}
.catalog-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  padding: 34px 0 70px;
}
.catalog-sidebar { position: sticky; top: 92px; align-self: start; }
.sidebar-panel { border: 1px solid var(--line); border-radius: 10px; background: #fff; overflow: hidden; }
.sidebar-panel h3 { margin: 0; padding: 18px 20px; background: var(--navy); color: #fff; font-size: 18px; }
.catalog-list { padding: 12px; }
.catalog-group { border-bottom: 1px solid #edf2f6; }
.catalog-group:last-child { border-bottom: 0; }
.catalog-group summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 8px;
  font-weight: 800;
}
.catalog-group summary::-webkit-details-marker { display: none; }
.catalog-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #eef5fb;
  color: var(--blue);
  flex: 0 0 auto;
}
.catalog-icon svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.catalog-children { padding: 0 0 12px 38px; display: grid; gap: 4px; }
.catalog-children a {
  display: block;
  padding: 9px 10px;
  border-left: 2px solid var(--line);
  color: #536679;
  font-weight: 700;
  font-size: 14px;
}
.catalog-children a:hover,
.catalog-children a.active { color: var(--blue); border-left-color: var(--gold); background: #f7fafc; }
.product-hero,
.section-block {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.product-hero { background: linear-gradient(135deg, #fff, #f8fafc); }
.hero-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 34px;
  align-items: center;
  padding: 36px;
}
.hero-copy h1 { font-size: clamp(36px, 5vw, 58px); line-height: 1.04; margin: 10px 0; }
.hero-copy h2 { font-size: 23px; line-height: 1.3; margin: 0 0 16px; color: var(--blue); }
.hero-copy p { color: var(--muted); font-size: 18px; margin: 0 0 24px; }
.spec-pills {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}
.spec-pills li { border: 1px solid #f1d27b; background: #fff8dd; border-radius: 10px; padding: 12px 14px; font-weight: 900; color: #4c3b00; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; }
.image-card { margin: 0; border: 1px solid var(--line); border-radius: 14px; background: #fff; overflow: hidden; box-shadow: 0 12px 28px rgba(13, 24, 34, 0.06); }
.image-card img { width: 100%; height: 100%; object-fit: contain; }
.image-card.cover img { object-fit: cover; }
.hero-image { height: 430px; padding: 22px; }
.section-block { margin-top: 28px; }
.section-title { padding: 24px; border-bottom: 1px solid var(--line); background: #fff; }
.section-title h2 { font-size: 30px; line-height: 1.2; margin: 0; }
.section-title p { max-width: 760px; color: var(--muted); margin: 7px 0 0; }
.overview,
.application,
.oem-split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
  padding: 24px;
  align-items: center;
}
.overview p,
.application p,
.oem-split p { font-size: 18px; color: var(--muted); margin: 0 0 18px; }
.highlight { border-left: 4px solid var(--gold); background: #f8fafc; padding: 16px 18px; font-weight: 900; color: #263747; }
.feature-grid,
.related-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; padding: 24px; }
.feature-card,
.related-card,
.faq-item { border: 1px solid var(--line); border-radius: 12px; padding: 20px; background: #fff; }
.feature-icon { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: #fff1d2; color: #4c3b00; font-weight: 900; margin-bottom: 14px; }
.feature-card h3,
.related-card h3 { font-size: 19px; line-height: 1.22; margin: 0; }
.gallery-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; padding: 24px; }
.gallery-grid .image-card { height: 260px; padding: 14px; background: #f8fafc; }
.model-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; padding: 24px; }
.model-card { border: 1px solid var(--line); border-radius: 14px; background: #fff; overflow: hidden; box-shadow: 0 10px 24px rgba(13, 24, 34, 0.06); }
.model-card .image-card { border: 0; border-bottom: 1px solid var(--line); border-radius: 0; height: 260px; padding: 16px; box-shadow: none; background: #f8fafc; }
.model-card-body { padding: 20px; }
.model-card-body h3 { margin: 0 0 8px; font-size: 25px; line-height: 1.15; }
.model-card-body p { margin: 0 0 14px; color: var(--muted); }
.model-specs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.model-specs span { border: 1px solid #f1d27b; background: #fff8dd; border-radius: 8px; padding: 8px 10px; color: #4c3b00; font-weight: 900; font-size: 14px; }
.comparison-table th { padding: 14px 15px; border-bottom: 1px solid var(--line); background: var(--navy); color: #fff; text-align: left; white-space: nowrap; }
.table-section { padding: 24px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; }
.spec-table { width: 100%; min-width: 640px; border-collapse: collapse; background: #fff; }
.spec-table td { padding: 13px 15px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.spec-table tr:last-child td { border-bottom: 0; }
.spec-table td:first-child { font-weight: 900; color: var(--navy); width: 260px; background: #f7fafc; }
.application .image-card { height: 370px; }
.application-tags,
.service-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.application-tags span,
.service-list span { border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; color: #415366; font-weight: 800; background: #f8fafc; }
.faq-wrap { display: grid; gap: 14px; padding: 24px; }
.faq-item h3 { margin: 0 0 8px; font-size: 20px; }
.faq-item p { margin: 0; color: var(--muted); }
.final-cta {
  margin-top: 28px;
  border-radius: 14px;
  background: linear-gradient(135deg, #0d1822, #17324c);
  color: #fff;
  padding: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  overflow: hidden;
}
.final-cta h2 { font-size: 30px; line-height: 1.18; margin: 0 0 8px; }
.final-cta p { margin: 0; color: #d9e3eb; }
.site-footer { background: var(--navy); color: #d7e0e8; padding: 52px 0 28px; }
.site-footer .footer-grid { display: grid; grid-template-columns: 1.35fr 1fr 1fr 1.15fr; gap: 34px; align-items: start; }
.site-footer h3 { margin: 0 0 16px; color: #fff; font-size: 18px; }
.site-footer p { margin: 12px 0 0; color: #b8c4cf; }
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.footer-brand img { width: 42px; height: 42px; object-fit: contain; background: #fff; border-radius: 10px; padding: 6px; }
.footer-title,
.footer-subtitle { display: block; }
.footer-title { color: #fff; font-weight: 900; font-size: 20px; }
.footer-subtitle { color: #b8c4cf; font-size: 13px; margin-top: 2px; }
.footer-links { display: grid; gap: 9px; }
.footer-links a,
.footer-links span { color: #d7e0e8; }
.footer-links a:hover { color: var(--gold); }
.footer-inquiry-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; margin-top: 18px; padding: 12px 18px; border-radius: 4px; background: var(--gold); color: #101820 !important; font-weight: 900; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 34px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.14); color: #aebbc7; font-size: 14px; }
.fuxin-whatsapp-float { position: fixed; right: 22px; bottom: 22px; z-index: 10000; display: inline-flex; align-items: center; gap: 10px; min-height: 54px; padding: 13px 18px; border-radius: 999px; background: #25d366; color: #fff !important; font-size: 15px; font-weight: 900; box-shadow: 0 14px 34px rgba(13,24,34,.22); }
.fuxin-whatsapp-float svg { width: 27px; height: 27px; display: block; fill: currentColor; }
@media (max-width: 980px) {
  .topbar { display: none; }
  .navlinks { display: none; }
  .catalog-shell { grid-template-columns: 1fr; }
  .catalog-sidebar { position: relative; top: auto; }
  .hero-grid,
  .overview,
  .application,
  .oem-split { grid-template-columns: 1fr; }
  .feature-grid,
  .related-grid,
  .model-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .gallery-grid { grid-template-columns: 1fr; }
  .site-footer .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .wrap { width: min(1180px, calc(100% - 28px)); }
  .quote-btn { padding: 11px 14px; }
  .catalog-shell { padding: 24px 0 52px; }
  .hero-grid,
  .overview,
  .application,
  .oem-split,
  .section-title,
  .feature-grid,
  .table-section,
  .related-grid,
  .faq-wrap,
  .final-cta,
  .gallery-grid { padding: 18px; }
  .hero-copy h1 { font-size: 34px; }
  .spec-pills,
  .feature-grid,
  .related-grid,
  .model-grid { grid-template-columns: 1fr; }
  .hero-image { height: 310px; }
  .application .image-card { height: 260px; }
  .final-cta { display: block; }
  .final-cta .solid-btn { margin-top: 18px; }
  .site-footer .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .footer-bottom { display: grid; gap: 10px; }
  .fuxin-whatsapp-float { right: 16px; bottom: 16px; min-height: 50px; padding: 12px 14px; }
  .fuxin-whatsapp-float span { display: none; }
}