header {
  height: 85px;
  background-color: #fff;
}
/* 当顶部导航处于激活状态下的样式 */
.header-nav-active {
  color: #0093fd;
  border-bottom: 3px solid #0093fd;
}
.header a {
  display: inline-block;
}
.icon-down-outlined {
  display: inline-block;
  font-size: 20px;
  transition: all 0.3s linear;
}
.product-menu:hover .no-active > .icon-down-outlined {
  transform: rotate(180deg);
}
.header-nav-active .icon-down-outlined {
  transform: rotate(180deg);
}
/* 顶部导航的内容区域 */
.header-content {
  width: 1200px;
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
}
/* logo */
.header-logo {
  width: 166px !important;
  height: 60px;
  flex: 1;
}
/* logo下的图片 */
.header-logo img {
  width: 100%;
  height: 100%;
}
/* 顶部导航排列方式 */
.header-nav {
  display: flex;
  height: 100%;
  font-size: 24px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  line-height: 31px;
  color: #333333;
  opacity: 1;
  align-items: center;
}
/* 单个导航的排列定位 */
.header-nav li {
  width: 208px;
  line-height: 82px;
  height: 100%;
  text-align: center;
  cursor: pointer;
}

.product-nav-list {
  transition: all 0.2s ease-out;
  transition-delay: 0.2s;
  position: relative;
  height: 0px;
  z-index: 10;
  width: 212px;
  background-color: #fff;
  visibility: hidden;
  overflow: hidden;
  opacity: 0.6;
  border-radius: 4px;
}
.product-nav-list li {
  height: 80px;
  line-height: 80px;
}

.product-menu:hover .product-nav-list {
  visibility: visible;
  height: 160px;
  opacity: 1;
}

.header-nav li:hover > a {
  color: #0093fd;
}