:root {
  --ink: #132033;
  --muted: #5b6778;
  --line: #d7deea;
  --bg: #f6f8fb;
  --card: #ffffff;
  --navy: #16325c;
  --gold: #b8893a;
  --shadow: 0 10px 30px rgba(19, 32, 51, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--navy);
  color: #fff;
  font-weight: 700;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 18px; }
.brand-text small { color: var(--muted); font-size: 12px; }
.nav { display: flex; gap: 22px; color: var(--muted); }
.nav a:hover { color: var(--navy); }

.hero {
  background:
    linear-gradient(120deg, rgba(22, 50, 92, 0.92), rgba(22, 50, 92, 0.72)),
    radial-gradient(circle at 20% 20%, #2d5a93, #10233f 55%);
  color: #fff;
  padding: 96px 0 88px;
}
.eyebrow {
  letter-spacing: 0.12em;
  color: #d8c08a;
  margin: 0 0 16px;
}
.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.25;
  max-width: 16ch;
}
.lead {
  max-width: 680px;
  color: rgba(255, 255, 255, 0.86);
  margin: 0 0 28px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 128px;
  height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid transparent;
}
.btn-primary { background: var(--gold); color: #fff; }
.btn-ghost { border-color: rgba(255, 255, 255, 0.4); color: #fff; }

.section { padding: 80px 0; }
.section-alt { background: var(--bg); }
.section-head { margin-bottom: 32px; }
.section-head h2 { margin: 0 0 8px; font-size: 28px; }
.section-head p { margin: 0; color: var(--muted); }

.about-grid,
.product-grid {
  display: grid;
  gap: 20px;
}
.about-grid { grid-template-columns: 1.4fr 0.8fr; }
.product-grid { grid-template-columns: repeat(3, 1fr); }
.card, .facts {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.card p { color: var(--muted); }
.facts { display: grid; gap: 18px; }
.fact span { display: block; color: var(--muted); font-size: 13px; }
.fact strong { font-size: 16px; }

.strength-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.strength-list li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
}
.strength-list strong { display: block; margin-bottom: 8px; }
.strength-list span { color: var(--muted); }

.contact-box {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 32px;
}
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.contact-list span { color: var(--muted); }

.footer {
  background: #101826;
  color: rgba(255, 255, 255, 0.78);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer a {
  color: #efd7a2;
  text-decoration: underline;
}

@media (max-width: 860px) {
  .nav { display: none; }
  .about-grid,
  .product-grid,
  .strength-list,
  .contact-box {
    grid-template-columns: 1fr;
  }
  .hero { padding: 72px 0; }
}