.site-header {
  background: #fff;
  border-bottom: none;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
.header-logo {
  display: block;
  margin: 0 auto 2rem auto;
  height: 110px;
}
.site-header .container {
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.header-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  justify-content: center;
  width: 100%;
}
.header-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 180px;
  min-height: 60px;
  font-size: 1.4rem;
  font-weight: 500;
  color: #fff;
  background: #7a8fa3;
  border-radius: 5px;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
  margin: 0;
  text-align: center;
  padding: 0 1.75rem;
}
.header-link.active {
  background: #e75b2b;
  color: #fff;
}
.header-link:nth-child(2) {
  background: #425d77;
}
.header-link:nth-child(3) {
  background: #2175bc;
}
.header-link:nth-child(4),
.header-link:nth-child(5) {
  background: #bfc3c7;
  color: #fff;
}
.header-link:hover {
  filter: brightness(0.95);
}

@media (max-width: 1400px) {
  .header-link {
    min-width: 160px;
    min-height: 55px;
    font-size: 1.3rem;
    padding: 0 1.5rem;
  }
}

@media (max-width: 1200px) {
  .header-link {
    min-width: 140px;
    min-height: 50px;
    font-size: 1.2rem;
    padding: 0 1.25rem;
  }
  .header-nav {
    gap: 1rem;
  }
}

@media (max-width: 992px) {
  .header-link {
    min-width: 120px;
    min-height: 45px;
    font-size: 1.1rem;
    padding: 0 1rem;
  }
  .header-nav {
    gap: 0.75rem;
  }
}

@media (max-width: 768px) {
  .header-link {
    min-width: 100px;
    min-height: 40px;
    font-size: 1rem;
    padding: 0 0.75rem;
  }
  .header-nav {
    gap: 0.5rem;
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .header-link {
    min-width: 80px;
    min-height: 35px;
    font-size: 0.9rem;
    padding: 0 0.5rem;
  }
  .header-nav {
    gap: 0.4rem;
  }
}