:root {
  --primary: #0a66c2;
  --primary-dark: #004182;
  --ink: #102033;
  --muted: #64748b;
  --line: #e2e8f0;
  --surface: #fff;
  --soft: #f5f8fc;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: Inter, sans-serif;
  color: var(--ink);
  background: #f8fafc;
  min-height: 100vh;
}
button,
input,
select,
textarea {
  font: inherit;
}
button {
  cursor: pointer;
}
a {
  color: inherit;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.85);
}
.header-inner {
  width: min(1180px, 92%);
  height: 76px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  line-height: 0;
}
.brand img {
  width: auto;
  height: 44px;
  max-width: 180px;
  object-fit: contain;
  display: block;
}
nav ul {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}
nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 13px;
  border-radius: 10px;
  text-decoration: none;
  color: #475569;
  font-size: 13px;
  font-weight: 600;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}
nav a:hover {
  color: var(--primary);
  background: #eff6ff;
}
nav a i {
  font-size: 14px;
}
nav .nav-cta {
  padding: 11px 18px;
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(10, 102, 194, 0.2);
}
nav .nav-cta:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
}
.menu-btn {
  display: none;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 22px;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  transition: 0.2s;
}
.menu-btn:hover {
  background: #eff6ff;
  color: var(--primary);
}
main {
  min-height: calc(100vh - 76px);
}
.footer {
  margin-top: 80px;
  background: #0b1729;
  color: #fff;
}
.footer-container {
  width: min(1180px, 92%);
  margin: auto;
  padding: 60px 0 48px;
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr 1fr;
  gap: 48px;
}
.footer-brand {
  max-width: 340px;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  margin-bottom: 18px;
  text-decoration: none;
}
.footer-logo img {
  width: auto;
  max-width: 155px;
  height: auto;
  display: block;
}
.footer-brand p {
  color: #94a3b8;
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 22px;
}
.footer-column {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-column h3 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}
.footer-column a,
.footer-contact p {
  color: #94a3b8;
  text-decoration: none;
  font-size: 13px;
  line-height: 1.6;
  transition:
    color 0.2s ease,
    transform 0.2s ease;
}
.footer-column a:hover {
  color: #fff;
  transform: translateX(3px);
}
.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-contact i {
  color: #60a5fa;
  width: 16px;
  text-align: center;
}
.footer-social {
  display: flex;
  gap: 9px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  border: 1px solid #26364d;
  border-radius: 10px;
  display: grid;
  place-items: center;
  text-decoration: none;
  color: #94a3b8;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}
.footer-social a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.footer-bottom {
  width: min(1180px, 92%);
  margin: auto;
  padding: 20px 0;
  border-top: 1px solid #203047;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #64748b;
  font-size: 12px;
}
@media (max-width: 800px) {
  .header-inner {
    height: 68px;
  }
  .menu-btn {
    display: flex;
  }
  .site-header nav {
    position: absolute;
    top: 76px;
    left: 4%;
    right: 4%;
    display: none;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 8px;
  }
  .site-header nav.active {
    display: block;
  }
  .site-header nav ul {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .site-header nav li,
  .site-header nav a {
    width: 100%;
  }
  .site-header nav a {
    padding: 13px 15px;
  }
  .site-header nav a i {
    width: 20px;
    text-align: center;
  }
  .site-header nav .nav-cta {
    margin-top: 4px;
    text-align: center;
    justify-content: center;
  }
  .footer-container {
    grid-template-columns: 1fr 1fr;
    gap: 35px;
  }
  .footer-brand {
    grid-column: 1/-1;
    max-width: 500px;
  }
}
@media (max-width: 520px) {
  .header-inner {
    width: 90%;
  }
  .brand img {
    height: 40px;
    max-width: 160px;
  }
  .footer-container {
    grid-template-columns: 1fr;
    padding: 48px 0 38px;
  }
  .footer-brand {
    grid-column: auto;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}