:root {
  --blue: #174e78;
  --blue-dark: #0e3455;
  --teal: #0b7f78;
  --ink: #1f2933;
  --muted: #617487;
  --line: #d8e4ec;
  --soft: #f2f7fa;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--soft);
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  min-height: 72px;
  padding: 0 7vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.brand img {
  display: block;
  width: 230px;
  height: 44px;
  object-fit: contain;
  object-position: left center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: #355168;
  font-size: 14px;
  white-space: nowrap;
}

.hero {
  min-height: 560px;
  padding: 78px 7vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(135deg, #0e3455 0%, #174e78 55%, #0b7f78 100%);
  color: #fff;
}

.hero-logo {
  width: 280px;
  height: 56px;
  object-fit: contain;
  object-position: left center;
  margin-bottom: 56px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
}

.hero .eyebrow {
  color: #aee6df;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 22px;
  font-size: 56px;
  line-height: 1.08;
}

h2 {
  margin-bottom: 12px;
  color: var(--blue-dark);
  font-size: 32px;
  line-height: 1.22;
}

.hero-lead {
  max-width: 780px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 18px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 700;
  white-space: nowrap;
}

.primary-action {
  color: #fff;
  background: var(--blue);
}

.hero .primary-action {
  color: var(--blue-dark);
  background: #fff;
}

.secondary-action {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.section {
  padding: 64px 7vw;
}

.product {
  background: #fff;
}

.product-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: center;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.product-row p,
.contact p {
  max-width: 760px;
  color: var(--muted);
  line-height: 1.7;
}

.contact {
  background: var(--soft);
}

.contact-lines {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.contact-lines span {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #365168;
}

.site-footer {
  min-height: 76px;
  padding: 22px 7vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #fff;
}

.site-footer img {
  width: 220px;
  height: 42px;
  object-fit: contain;
  object-position: left center;
}

@media (max-width: 720px) {
  .site-header {
    padding: 0 20px;
  }

  .brand img {
    width: 168px;
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 56px 20px;
  }

  .hero-logo {
    width: 210px;
    margin-bottom: 44px;
  }

  h1 {
    font-size: 40px;
  }

  h2 {
    font-size: 26px;
  }

  .section {
    padding: 44px 20px;
  }

  .product-row {
    grid-template-columns: 1fr;
    padding: 22px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 22px 20px;
  }
}