:root {
  --bg: #f5f6f8;
  --white: #ffffff;
  --dark: #121826;
  --text: #374151;
  --muted: #6b7280;
  --line: #e5e7eb;
  --primary: #0f4aa3;
  --primary-dark: #0a2c66;
  --accent: #d9b36a;
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
  --radius: 18px;
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Noto Sans SC', Arial, sans-serif;
  line-height: 1.7;
}
img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
a { color: inherit; text-decoration: none; }
.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(229,231,235,.9);
}
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 84px;
}
.brand {
  font-size: 26px;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: .2px;
}
.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
}
.main-nav a {
  font-size: 15px;
  font-weight: 500;
  color: #374151;
}
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0b1730 0%, #103b82 55%, #1d5fc4 100%);
  color: var(--white);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(255,255,255,.15), transparent 35%);
}
.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 44px;
  align-items: center;
  padding: 96px 0 90px;
}
.eyebrow, .section-kicker {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.hero h1 {
  margin: 0 0 20px;
  font-size: 54px;
  line-height: 1.15;
  font-weight: 800;
}
.hero-desc {
  max-width: 760px;
  font-size: 18px;
  color: rgba(255,255,255,.88);
  margin-bottom: 30px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
}
.btn-primary {
  background: var(--white);
  color: var(--primary-dark);
}
.btn-secondary {
  border: 1px solid rgba(255,255,255,.35);
  color: var(--white);
}
.hero-card img,
.section-media img,
.product-card img,
.news-card img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.intro-strip {
  margin-top: -36px;
  position: relative;
  z-index: 3;
}
.intro-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.intro-box {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.intro-box h3 {
  margin: 0 0 10px;
  font-size: 22px;
  color: var(--dark);
}
.section {
  padding: 88px 0;
}
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.section-head.center {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 42px;
}
h2 {
  margin: 0 0 18px;
  color: var(--dark);
  font-size: 40px;
  line-height: 1.2;
}
.section-copy p,
.section-head p,
.product-body p,
.adv-card p,
.news-body p,
.contact-list li {
  font-size: 16px;
  color: var(--text);
}
.product-grid,
.news-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.product-card,
.news-card,
.adv-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.product-body,
.news-body {
  padding: 22px;
}
.product-body h3,
.news-body h3,
.adv-card h3 {
  margin: 0 0 12px;
  color: var(--dark);
  font-size: 22px;
  line-height: 1.3;
}
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.adv-card {
  padding: 28px;
}
.contact-layout {
  align-items: start;
}
.contact-list {
  padding-left: 20px;
}
.site-footer {
  background: #111827;
  color: rgba(255,255,255,.82);
  padding: 36px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}
.floating-contact {
  position: fixed;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.contact-item {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}
.icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: 999px;
  background: var(--white);
  box-shadow: var(--shadow);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex: 0 0 auto;
}
.icon-wrap img {
  width: 24px;
  height: 24px;
  object-fit: contain;
}
.label {
  max-width: 0;
  opacity: 0;
  overflow: hidden;
  white-space: nowrap;
  background: var(--white);
  color: var(--dark);
  padding: 14px 0;
  border-radius: 999px;
  box-shadow: var(--shadow);
  transition: all .28s ease;
  font-size: 14px;
  font-weight: 600;
}
.contact-item:hover .label {
  max-width: 320px;
  opacity: 1;
  padding: 14px 18px;
}
@media (max-width: 1100px) {
  .product-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-content, .two-col { grid-template-columns: 1fr; }
}
@media (max-width: 780px) {
  .container { width: min(var(--container), calc(100% - 28px)); }
  .nav-bar { padding: 16px 0; min-height: auto; }
  .main-nav { display: none; }
  .hero-content { padding: 72px 0 76px; }
  .hero h1 { font-size: 36px; }
  h2 { font-size: 30px; }
  .intro-grid, .product-grid, .news-grid, .advantage-grid { grid-template-columns: 1fr; }
  .floating-contact { right: 10px; bottom: 18px; top: auto; transform: none; }
  .label { display: none; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}