:root {
  --ink: #122033;
  --muted: #5b6b7f;
  --soft: #f4f8fb;
  --line: #dce6ee;
  --brand: #075da8;
  --brand-2: #0b83c9;
  --deep: #06345d;
  --white: #ffffff;
  --shadow: 0 20px 55px rgba(8, 38, 70, 0.12);
  --radius: 8px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--brand);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--brand-2);
}

.topbar { background: var(--deep); color: rgba(255,255,255,0.86); font-size: 13px; }
.topbar-inner { display: flex; justify-content: space-between; gap: 16px; padding: 8px 0; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(220,230,238,0.85);
}
.header-main { min-height: 76px; display: flex; align-items: center; gap: 22px; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 290px; }
.brand-mark {
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  border-radius: 8px;
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(7,93,168,0.22);
}
.brand strong { display: block; font-size: 17px; line-height: 1.25; }
.brand em { display: block; color: var(--muted); font-style: normal; font-size: 11px; margin-top: 2px; }
.desktop-nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav-link { padding: 24px 10px; color: #27384d; font-weight: 600; font-size: 14px; border-bottom: 2px solid transparent; }
.nav-link:hover, .nav-link.is-active { color: var(--brand); border-bottom-color: var(--brand); }
.header-phone { background: var(--brand); color: white; padding: 10px 16px; border-radius: 6px; font-weight: 700; white-space: nowrap; }
.menu-toggle { display: none; border: 0; background: transparent; padding: 10px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; }
.mobile-nav { display: none; }

.hero { position: relative; min-height: 680px; display: flex; align-items: center; overflow: hidden; color: white; }
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,23,43,0.86), rgba(4,23,43,0.48) 48%, rgba(4,23,43,0.18)); }
.hero-content { position: relative; max-width: var(--container); padding: 90px 0; }
.hero h1 { font-size: clamp(42px, 6vw, 76px); line-height: 1.08; margin: 18px 0 20px; max-width: 820px; }
.hero p { font-size: 19px; max-width: 720px; color: rgba(255,255,255,0.88); margin: 0 0 30px; }
.hero-actions, .detail-actions, .contact-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.hero-points span { border: 1px solid rgba(255,255,255,0.3); background: rgba(255,255,255,0.12); padding: 8px 12px; border-radius: 999px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 20px;
  border-radius: 6px;
  font-weight: 800;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--brand); color: white; box-shadow: 0 14px 30px rgba(7,93,168,0.22); }
.btn-secondary { background: rgba(255,255,255,0.14); color: white; border-color: rgba(255,255,255,0.36); }
.btn-light { background: white; color: var(--brand); }
.btn-ghost { border-color: var(--line); color: var(--brand); background: white; }
.btn-small { min-height: 40px; padding: 9px 14px; }

.section { padding: 86px 0; }
.section-muted { background: var(--soft); }
.section-head { display: flex; justify-content: space-between; gap: 32px; align-items: end; margin-bottom: 34px; }
.section-head h2, .intro-grid h2, .split h2, .page-lead h2, .cta-panel h2 { font-size: clamp(28px, 4vw, 44px); line-height: 1.18; margin: 10px 0 0; }
.section-head p { max-width: 560px; color: var(--muted); margin: 0; }
.intro-band { padding: 54px 0; border-bottom: 1px solid var(--line); }
.intro-grid { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 56px; align-items: center; }
.intro-grid p, .split p, .page-lead p, .article-content p, .quote-box p { color: var(--muted); }
.intro-copy { display: grid; gap: 22px; }
.intro-copy p { margin: 0; font-size: 17px; line-height: 1.82; }
.intro-service-list { margin: 0; display: grid; border-top: 1px solid var(--line); }
.intro-service-list div { display: grid; grid-template-columns: 120px 1fr; gap: 18px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.intro-service-list dt { color: var(--brand); font-weight: 900; }
.intro-service-list dd { margin: 0; color: var(--muted); }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-grid-compact { grid-template-columns: repeat(2, 1fr); }
.product-card {
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(8,38,70,0.06);
  transition: transform .2s ease, box-shadow .2s ease;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.product-img { aspect-ratio: 4 / 3; background: var(--soft); overflow: hidden; }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.product-card:hover .product-img img { transform: scale(1.035); }
.product-card-body { padding: 20px; }
.tag-row { display: flex; gap: 8px; flex-wrap: wrap; min-height: 28px; }
.tag-row span { background: #eaf5fc; color: var(--brand); padding: 3px 8px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.product-card h3 { margin: 12px 0 8px; font-size: 21px; }
.product-card p { color: var(--muted); margin: 0; }
.card-actions { display: flex; justify-content: space-between; gap: 10px; margin-top: 18px; font-weight: 800; color: var(--brand); }

.split { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 46px; align-items: center; }
.process-list { display: grid; gap: 14px; }
.process-card { display: grid; grid-template-columns: 160px 1fr; gap: 18px; padding: 12px; background: white; border: 1px solid var(--line); border-radius: var(--radius); }
.process-card img { width: 160px; height: 112px; object-fit: cover; border-radius: 6px; }
.process-card span { color: var(--brand); font-weight: 900; }
.process-card h3 { margin: 2px 0 4px; }
.process-card p { margin: 0; color: var(--muted); }

.solution-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 20px; }
.feature-card {
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 8px 24px rgba(8,38,70,0.05);
}
.feature-card.large { grid-row: span 2; padding: 0; overflow: hidden; }
.feature-card.large img { height: 300px; width: 100%; object-fit: cover; }
.feature-card.large div { padding: 28px; }
.feature-card h3 { margin: 0 0 8px; font-size: 22px; }
.feature-card p { color: var(--muted); margin: 0 0 12px; }
.feature-card a { color: var(--brand); font-weight: 800; }
.with-image img { width: 100%; height: 220px; object-fit: cover; border-radius: 6px; margin-bottom: 18px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.section-cta { background: var(--deep); color: white; }
.cta-panel { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.cta-panel p { color: rgba(255,255,255,0.75); }

.inner-hero { position: relative; min-height: 340px; display: flex; align-items: end; color: white; overflow: hidden; }
.inner-hero img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.inner-hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,23,43,0.82), rgba(4,23,43,0.36)); }
.inner-hero-content { position: relative; padding: 84px 0 56px; }
.inner-hero h1 { font-size: clamp(34px, 5vw, 58px); margin: 10px 0; line-height: 1.1; }
.inner-hero p { max-width: 720px; color: rgba(255,255,255,0.86); margin: 0; font-size: 18px; }
.breadcrumb { display: flex; gap: 10px; align-items: center; padding-top: 18px; font-size: 14px; color: var(--muted); }
.breadcrumb a { color: var(--brand); }

.layout-with-sidebar { display: grid; grid-template-columns: 260px 1fr; gap: 36px; align-items: start; }
.side-panel { position: sticky; top: 116px; border: 1px solid var(--line); border-radius: var(--radius); background: white; padding: 16px; box-shadow: 0 8px 24px rgba(8,38,70,0.05); }
.side-title { font-weight: 900; font-size: 19px; padding: 6px 8px 12px; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
.side-link { display: block; padding: 12px 10px; border-radius: 6px; color: #30435a; font-weight: 700; }
.side-link:hover, .side-link.is-active { background: #eaf5fc; color: var(--brand); }
.side-cta { margin-top: 16px; background: var(--deep); color: white; padding: 16px; border-radius: 6px; display: grid; gap: 10px; }
.side-cta span { color: rgba(255,255,255,0.75); font-size: 14px; }
.page-lead { margin-bottom: 28px; }

.detail-grid { display: grid; grid-template-columns: 1fr 0.9fr; gap: 34px; align-items: start; }
.detail-gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.detail-gallery img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--line); }
.detail-gallery img:first-child { grid-column: span 2; aspect-ratio: 16 / 9; }
.detail-summary { background: var(--soft); padding: 30px; border-radius: var(--radius); border: 1px solid var(--line); }
.detail-summary h2 { font-size: 36px; margin: 10px 0; }
.check-list { padding: 0; margin: 20px 0; list-style: none; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 24px; }
.check-list li::before { content: ""; position: absolute; left: 0; top: 11px; width: 8px; height: 8px; border-radius: 50%; background: var(--brand-2); }
.info-table { margin-top: 32px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.info-table div { display: grid; grid-template-columns: 160px 1fr; border-bottom: 1px solid var(--line); }
.info-table div:last-child { border-bottom: 0; }
.info-table strong { padding: 16px; background: var(--soft); }
.info-table span { padding: 16px; color: var(--muted); }

.application-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.application-card { display: grid; grid-template-columns: 220px 1fr; gap: 20px; align-items: center; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; background: white; }
.application-card img { height: 160px; width: 220px; object-fit: cover; border-radius: 6px; }
.application-card h3 { margin: 0 0 8px; }
.application-card p { color: var(--muted); margin: 0 0 12px; }
.application-card a { color: var(--brand); font-weight: 800; }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 36px; align-items: start; }
.article-content { background: white; border: 1px solid var(--line); border-radius: var(--radius); padding: 34px; }
.article-content h2 { margin-top: 0; font-size: 28px; }
.quote-box { background: var(--soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; position: sticky; top: 116px; }
.quality-grid, .values-grid, .steps, .resource-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.quality-grid article, .values-grid article, .steps article, .resource-card {
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 8px 24px rgba(8,38,70,0.05);
}
.quality-grid span, .steps strong { color: var(--brand); font-size: 28px; font-weight: 900; }
.round-img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; object-fit: cover; }
.image-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.image-strip img { height: 190px; width: 100%; object-fit: cover; border-radius: var(--radius); }
.resource-grid { grid-template-columns: repeat(2, 1fr); }
.resource-card h3 { margin-top: 0; }
.resource-card p { color: var(--muted); }
.resource-card a { color: var(--brand); font-weight: 800; }
.faq-list { display: grid; gap: 12px; max-width: 900px; }
.faq-list details { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; background: white; }
.faq-list summary { cursor: pointer; font-weight: 800; font-size: 18px; }
.faq-list p { color: var(--muted); margin-bottom: 0; }

.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 28px; align-items: start; }
.contact-card, .inquiry-form { border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; background: white; box-shadow: 0 8px 24px rgba(8,38,70,0.05); }
.contact-card h2 { font-size: 32px; margin: 10px 0; }
.inquiry-form { display: grid; gap: 14px; }
.inquiry-form h2 { margin: 0 0 8px; }
.inquiry-form label { display: grid; gap: 6px; font-weight: 800; }
.inquiry-form input, .inquiry-form textarea, .inquiry-form select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 13px;
  min-height: 46px;
  font: inherit;
  color: var(--ink);
  background: white;
}
.form-note { color: var(--muted); margin: 0; font-size: 14px; }
.form-result { border: 1px solid #b9dbe9; background: #eef9fd; color: var(--deep); padding: 14px; border-radius: 6px; white-space: pre-wrap; }

.site-footer { background: #061f38; color: rgba(255,255,255,0.78); padding: 64px 0 96px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 0.8fr 0.8fr 0.9fr; gap: 34px; }
.footer-brand h2, .site-footer h3 { color: white; margin-top: 0; }
.footer-brand .brand-mark { margin-bottom: 16px; }
.footer-links { display: grid; gap: 8px; }
.footer-links a:hover { color: white; }
.footer-phone { display: inline-flex; color: white; font-weight: 900; margin-top: 8px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; padding-top: 30px; margin-top: 36px; border-top: 1px solid rgba(255,255,255,0.14); font-size: 13px; }
.sticky-actions { display: none; }

.not-found { min-height: 55vh; display: flex; align-items: center; }
.not-found h1 { font-size: 46px; margin: 10px 0; }

@media (max-width: 1080px) {
  .desktop-nav, .header-phone { display: none; }
  .menu-toggle { display: block; margin-left: auto; }
  .mobile-nav { display: none; padding: 0 20px 20px; border-top: 1px solid var(--line); background: white; }
  .mobile-nav.is-open { display: grid; }
  .mobile-nav .nav-link { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .mobile-nav-cta { margin-top: 12px; background: var(--brand); color: white; padding: 12px; border-radius: 6px; text-align: center; font-weight: 800; }
  .product-grid, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .layout-with-sidebar, .split, .intro-grid, .detail-grid, .article-layout, .contact-grid { grid-template-columns: 1fr; }
  .side-panel, .quote-box { position: static; }
  .solution-grid { grid-template-columns: 1fr 1fr; }
  .quality-grid, .values-grid, .steps, .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .container { width: min(100% - 28px, var(--container)); }
  .topbar-inner { flex-direction: column; gap: 2px; }
  .header-main { min-height: 68px; }
  .brand { min-width: 0; }
  .brand strong { font-size: 14px; }
  .brand em { display: none; }
  .hero { min-height: 620px; }
  .hero h1 { font-size: 38px; }
  .hero p { font-size: 16px; }
  .section { padding: 56px 0; }
  .section-head { display: block; }
  .product-grid, .product-grid-compact, .solution-grid, .application-grid, .quality-grid, .values-grid, .steps, .resource-grid, .footer-grid, .image-strip { grid-template-columns: 1fr; }
  .process-card { grid-template-columns: 1fr; }
  .process-card img { width: 100%; height: 190px; }
  .application-card { grid-template-columns: 1fr; }
  .application-card img { width: 100%; height: 210px; }
  .detail-gallery { grid-template-columns: 1fr; }
  .detail-gallery img:first-child { grid-column: auto; }
  .info-table div { grid-template-columns: 1fr; }
  .cta-panel, .footer-bottom { flex-direction: column; align-items: flex-start; }
  .site-footer { padding-bottom: 64px; }
  .sticky-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 12px 14px 18px;
    background: #061f38;
  }
  .sticky-actions a {
    min-height: 46px;
    display: grid;
    place-items: center;
    background: var(--brand);
    color: white;
    border-radius: 6px;
    font-weight: 900;
    box-shadow: var(--shadow);
  }
  .sticky-actions a:first-child { background: var(--deep); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}