#header {
  position: sticky;
  position: -webkit-sticky;
  top: 0;
  z-index: 1071;
  background-color: white;
}
.navbar {
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -ms-flex-align: center;
  -ms-flex-pack: justify;
  padding: 10px 0.25rem 10px;
}

.rounded {
  border-radius: 0 !important;
}

.nav_custom_item {
  display: inline-block;
  margin-right: 12px;
  line-height: inherit;
  white-space: nowrap;
}

.navbar-toggler-icon {
  display: inline-block;
  width: 0.69rem;
  height: 0.58rem;
  vertical-align: middle;
  content: "";
  background: no-repeat center center;
  background-size: 100% 100%;
}

.navbar-light .navbar-toggler {
  border: 0;
}

.navbar-expand-lg .navbar-nav .nav-link {
  padding: 0.1rem;
  text-align: center;
  font-size: 16px;
  font-family: PingFang-SC-Medium, PingFang-SC;
  font-weight: 500;
  color: rgba(51, 51, 51, 1);
  line-height: 22px;
}

.navbar-expand-lg .navbar-nav .nav-link :hover {
  color: rgba(30, 135, 254, 1);
}

.navbar-collapse {
  flex-grow: 0;
}

.contact-item {
  display: flex;
  flex-direction: row;
  align-items: center;
  margin-left: 16px;
}

.contact-item a {
  font-size: 18px;
  font-family: PingFang-SC-Bold, PingFang-SC;
  font-weight: bold;
  color: rgba(51, 51, 51, 1);
  line-height: 25px;
}

.contact-item img {
  width: 23px;
  height: 23px;
}

/* 手机的导航栏样式 */

.navbar-header-phone {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 120px;
  height: 36px;
}

.meun-list-scroll {
  overflow: scroll;
  position: absolute;
  height: calc(100%-100px);
  width: 100%;
  top: 50px;
  bottom: 50px;
}

.mdui-list a {
  width: 100%;
}

.navbar-phone-title {
  font-size: 16px;
  font-weight: bold;
  color: rgba(0, 0, 0, 1);
  line-height: 22px;
}

.navbar-phone-subTitle {
  width: 50%;
  font-size: 14px;
  color: rgba(102, 102, 102, 1);
  line-height: 20px;
}

.mask {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: #000;
  opacity: 0.4;
  z-index: 999;
}

.transition {
  transition: all .3s cubic-bezier(0, 0, .2, 1);
}<!--0.0001368522644043-->