:root {
  --bg: #ffffff;
  --surface: #f6f8fb;
  --line: #e6ecf2;
  --text: #1f2d3d;
  --muted: #6b7b8c;
  --brand: #123b68;
  --brand-dark: #0c2d50;
  --accent: #db8d2f;
  --white: #ffffff;
  --shadow: 0 16px 38px rgba(16, 34, 55, 0.08);
  --radius: 18px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; }
.container {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--white);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 24px rgba(12, 34, 55, 0.04);
}
.header-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 86px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand-logo {
  display: block;
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
}
.brand-title,
.brand-subtitle {
  display: block;
}
.brand-title {
  font-size: 17px;
  font-weight: 700;
}
.brand-subtitle {
  color: var(--muted);
  font-size: 12px;
}
.header-hotline {
  margin-left: auto;
  padding: 10px 16px;
  border-radius: 999px;
  background: #f2f6fb;
  color: var(--brand);
  font-weight: 700;
}
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px;
  border-radius: 999px;
  background: var(--brand);
}
.desktop-nav a {
  padding: 10px 16px;
  border-radius: 999px;
  color: rgba(255,255,255,0.82);
}
.desktop-nav a.active,
.desktop-nav a:hover {
  background: rgba(255,255,255,0.12);
  color: var(--white);
}
.mobile-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 12px;
  background: var(--brand);
  cursor: pointer;
  padding: 12px;
}
.mobile-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--white);
}
.mobile-nav {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--white);
}
.mobile-nav a {
  display: block;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
}
.mobile-nav.open {
  display: block;
}
.hero,
.page-banner {
  position: relative;
  min-height: 380px;
  overflow: hidden;
  background: linear-gradient(135deg, #0c2d50 0%, #184874 100%);
}
.hero-slide,
.page-banner {
  background-repeat: no-repeat;
}
.hero-slide {
  position: absolute;
  inset: 0;
  background-position: right 5% center;
  background-size: auto 76%;
  opacity: 0;
  transition: opacity .5s ease;
}
.hero-slide.active {
  opacity: 1;
}
.hero-overlay,
.page-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(12, 45, 80, 0.98) 0%, rgba(12, 45, 80, 0.95) 42%, rgba(12, 45, 80, 0.72) 58%, rgba(12, 45, 80, 0.16) 78%, rgba(12, 45, 80, 0) 100%);
}
.hero-inner,
.page-banner-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  min-height: 380px;
}
.hero-copy,
.page-banner-inner {
  max-width: 760px;
}
.page-heading {
  padding: 42px 0 20px;
  background: linear-gradient(180deg, #f7f9fc 0%, #ffffff 100%);
  border-bottom: 1px solid var(--line);
}
.contact .page-heading {
  padding: 16px 0 0;
  border-bottom: 0;
}
.page-heading-inner {
  max-width: 820px;
}
.page-heading h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  color: var(--brand-dark);
}
.page-heading p {
  margin: 0;
  color: var(--muted);
  line-height: 1.9;
}
.eyebrow {
  display: inline-flex;
  margin-bottom: 16px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.14);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
}
.eyebrow.dark {
  background: #edf4fb;
  color: var(--brand);
}
.hero h1,
.page-banner h1,
.section-head h2 {
  margin: 0 0 16px;
  line-height: 1.15;
}
.hero h1,
.page-banner h1 {
  color: var(--white);
  font-size: clamp(32px, 4.4vw, 48px);
}
.lead,
.page-banner p {
  color: rgba(255,255,255,0.9);
  line-height: 1.9;
  font-size: 16px;
}
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.button,
.button-secondary,
.filter-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 12px 20px;
  transition: all .25s ease;
}
.button {
  background: var(--accent);
  color: var(--white);
  font-weight: 700;
}
.button-secondary {
  border: 1px solid rgba(255,255,255,0.4);
  color: var(--white);
}
.button-secondary.dark {
  border-color: var(--line);
  color: var(--brand);
  background: var(--white);
}
.hero-indicators {
  position: absolute;
  left: 50%;
  bottom: 26px;
  z-index: 2;
  display: flex;
  gap: 10px;
  transform: translateX(-50%);
}
.hero-indicators button {
  width: 12px;
  height: 12px;
  border: 0;
  border-radius: 999px;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
}
.hero-indicators button.active {
  background: var(--accent);
}
section {
  padding: 56px 0;
}
.section-alt {
  background: var(--surface);
}
.stats-grid,
.product-grid,
.card-grid,
.news-grid,
.detail-grid {
  display: grid;
  gap: 22px;
}
.stats-grid {
  grid-template-columns: repeat(4, 1fr);
  transform: translateY(-56px);
}
.stat-card,
.article-card,
.info-card,
.news-card,
.toolbar,
.detail-content,
.detail-side {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.stat-card {
  padding: 26px 22px;
  text-align: center;
}
.stat-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--brand);
  font-size: 28px;
}
.muted,
.section-head p,
.article-card-content p,
.news-card p,
.info-card p,
.detail-content p,
.footer-note {
  color: var(--muted);
  line-height: 1.85;
}
.section-head {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 28px;
  align-items: end;
  margin-bottom: 24px;
}
.chip,
.card-meta {
  display: inline-flex;
  width: fit-content;
}
.chip {
  padding: 7px 12px;
  border-radius: 999px;
  background: #edf4fb;
  color: var(--brand);
  font-size: 12px;
  font-weight: 700;
}
.product-grid {
  grid-template-columns: repeat(3, 1fr);
}
.article-card {
  overflow: hidden;
}
.product-thumb,
.news-thumb,
.category-thumb,
.detail-thumb {
  aspect-ratio: 1.15 / 1;
  object-fit: cover;
  width: 100%;
  display: block;
}
.article-card-content,
.news-card-content,
.info-card,
.detail-content,
.detail-side,
.toolbar {
  padding: 22px;
}
.article-card h3,
.news-card h3,
.info-card h3 {
  margin: 14px 0 12px;
}
.card-grid {
  grid-template-columns: repeat(3, 1fr);
}
.news-grid {
  grid-template-columns: repeat(3, 1fr);
}
.card-meta {
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
}
.toolbar {
  margin-bottom: 24px;
}
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}
.filter-chip {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--muted);
  cursor: pointer;
}
.filter-chip.active {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--white);
}
.search-box input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  font: inherit;
}
.detail-grid {
  grid-template-columns: 1.25fr .75fr;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
}
.contact-panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}
.contact-highlight {
  background: linear-gradient(135deg, #10345c, #1f4d7e);
  color: rgba(255,255,255,0.92);
}
.contact-highlight h2,
.contact-highlight .contact-item strong,
.contact-highlight .contact-item span {
  color: var(--white);
}
.contact-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}
.contact-item {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
}
.contact-item strong {
  font-size: 13px;
}
.contact-item span {
  line-height: 1.7;
}
.contact-steps {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}
.step-card {
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
}
.step-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--brand);
}
.text-link {
  color: var(--brand);
  font-weight: 700;
}
.site-footer {
  padding: 54px 0;
  background: var(--brand-dark);
  color: rgba(255,255,255,0.86);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr 1fr;
  gap: 28px;
}
.site-footer h3 {
  margin-top: 0;
  color: var(--white);
}
.footer-links a {
  display: block;
  margin-bottom: 10px;
}
@media (max-width: 960px) {
  .header-hotline,
  .desktop-nav {
    display: none;
  }
  .mobile-toggle {
    display: block;
    margin-left: auto;
  }
  .hero,
  .page-banner,
  .hero-inner,
  .page-banner-inner {
    min-height: 360px;
  }
  .hero-slide {
    background-size: auto 62%;
    background-position: right -4px center;
  }
  .stats-grid,
  .product-grid,
  .card-grid,
  .news-grid,
  .detail-grid,
  .contact-grid,
  .footer-grid,
  .section-head {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    transform: translateY(-36px);
  }
}
@media (max-width: 640px) {
  .container {
    width: min(100% - 24px, 1200px);
  }
  .header-bar {
    min-height: 74px;
  }
  .brand-title {
    font-size: 15px;
  }
  .hero h1,
  .page-banner h1 {
    font-size: 28px;
  }
  .lead,
  .page-banner p {
    font-size: 14px;
  }
  .button-row {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-slide {
    background-size: 82% auto;
    background-position: center bottom 18px;
  }
  .hero-overlay {
    background: linear-gradient(180deg, rgba(12, 45, 80, 0.95) 0%, rgba(12, 45, 80, 0.86) 46%, rgba(12, 45, 80, 0.34) 100%);
  }
}