.product-nav-header {
  width: 100%;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
}
.product-nav-wrap {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding-left: 108px;
  height: 80px;
  box-sizing: border-box;
}
.product-nav-logo {
  display: block;
  margin-right: 168px;
}
.product-nav-logo img {
  height: 48px;
  display: block;
}
.product-nav {
  display: flex;
  justify-content: flex-start;
}
.product-nav-list {
  display: flex;
  gap: 40px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.product-nav-link {
  color: #222;
  font-size: 18px;
  text-decoration: none;
  padding: 8px 0;
  transition: color 0.2s;
  font-weight: 500;
}
.product-nav-link:hover,
.product-nav-link.active {
  color: #30688E;
  border-bottom: 2px solid #30688E;
}
body {
  padding-top: 80px;
}