:root {
  --bg: #f4f6f8;
  --text: #1f2933;
  --muted: #52606d;
  --primary: #1f4f7a;
  --card: #ffffff;
  --border: #d9e2ec;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
.container { width: min(1100px, 92%); margin: 0 auto; }
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
}
.nav-wrap { display: flex; justify-content: space-between; align-items: center; padding: 1rem 0; }
.logo { color: var(--primary); font-weight: 700; text-decoration: none; }
.nav-list { list-style: none; display: flex; gap: 1rem; margin: 0; padding: 0; }
.nav-list a { text-decoration: none; color: var(--muted); font-weight: 600; }
.nav-list a.active, .nav-list a:hover { color: var(--primary); }
.hero { padding: 4rem 0 2rem; }
.hero h1 { font-size: 2.2rem; margin-bottom: 0.8rem; }
.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 0.7rem 1rem;
  text-decoration: none;
  border: 0;
  border-radius: 4px;
  cursor: pointer;
}
.grid-3, .grid-2 { display: grid; gap: 1rem; margin: 2rem auto; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.2rem;
}
.page { padding: 2rem 0; }
.rfq-form { max-width: 700px; }
.rfq-form label { font-weight: 600; margin-top: 1rem; display: block; }
.rfq-form input, .rfq-form textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-top: 0.4rem;
}
.alert { padding: 0.8rem; border-radius: 6px; }
.alert.success { background: #e3f9e5; color: #207227; }
.alert.error { background: #ffe3e3; color: #8a1f1f; }
.site-footer {
  background: #0f1720;
  color: #cbd2d9;
  margin-top: 3rem;
  padding-top: 2rem;
}
.site-footer a { color: #d9e2ec; text-decoration: none; }
.footer-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.footer-bottom { text-align: center; padding: 1rem 0; border-top: 1px solid #243b53; margin-top: 1rem; }