.header {
  position: sticky;
  top:0;
  z-index: 9;
  display: flex;
  align-items: center;
  width:100%;
  height: 90px;
  /*no*/
  margin: auto;
  background-color: #10163b;
  min-width: 1300px;
}
.header .nav {
  display: flex;
  width: 1200px;
  /*no*/
  margin: auto;
}
.header .nav .site_logo {
  display: flex;
  align-items: center;
}
.header .nav ul {
  float: right;
  display: inline-flex;
  align-items: center;
  position: relative;
  margin: 0;
  padding: 0;
  margin-top: -4px;
  /*no*/
  padding-left: 110px;
  /*no*/
  height: 90px;
  /*no*/
}
.header .nav ul .nav_item {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
  position: relative;
  margin-right: 60px;
  /*no*/
  list-style-type: none;
  font-size: 18px;
  /*no*/
  color: #ffffff;
  height: 100%;
}
.header .nav ul .nav_item a {
  text-decoration: none;
  color: inherit;
  font-size: inherit;
}
.header .nav ul .nav_item a:hover {
  color: #fbdb7d;
}
.header .nav ul .nav_item .under_line {
  position: absolute;
  bottom: 0;
  left: 50%;
  margin: auto;
  margin-left: -25px;
  padding-bottom: 15px;
  /*no*/
  width: 50px;
  /*no*/
  height: 0;
  border-bottom: 3px solid transparent;
  /*no*/
}
.header .nav ul .nav_item_actived a {
  color: #fbdb7d;
}
.header .nav ul .nav_drop .icon_arrow {
  margin-left: 5px;
  transform: rotate(180deg);
}
.header .nav ul .nav_drop .drop_menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 135px;
  height: 0px;
  background-color: #fff;
  border-radius: 4px;
  transition: height 0.45s linear;
  overflow: hidden;
  box-shadow: 0 0 10px 0 #eee;
}
.header .nav ul .nav_drop .drop_menu .menu_item {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 16px;
  background-color: #fff;
  font-size: 16px;
  color: #333333;
  cursor: pointer;
}
.header .nav ul .nav_drop .drop_menu .menu_item:hover {
  background-color: #fbdb7d;
  color: #000000;
}
.header .nav ul .nav_drop .drop_menu ul {
  display: block;
  padding: 0;
  margin: 10px 0;
  height: auto;
}
.header .nav ul .nav_drop .drop_menu .left_menu {
  box-sizing: border-box;
  width: 100%;
  text-align: center;
}
.header .nav ul .nav_drop .drop_menu .right_menu {
  padding-left: 20px;
  padding-right: 15px;
  width: 50%;
  float: left;
}
.header .nav ul .nav_drop .drop_menu::after {
  content: "";
  display: block;
  clear: both;
}
.header .nav ul .access .drop_menu {
  width: 190px;
}
.header .nav ul .access .drop_menu .left_menu {
  width: auto;
  border-right: none;
}
.header .nav ul .access .drop_menu .left_menu .menu_item {
  white-space: nowrap;
  cursor: pointer;
}
.header .nav ul .contact {
  position: relative;
}
.header .nav ul .contact:hover .contact_box {
  display: block;
  transition: all 0.3s ease-in;
}
.header .nav ul .contact:hover .under_line {
  border-bottom: 3px solid transparent;
  /*no*/
}
.header .nav ul .contact .contact_box {
  display: none;
  position: absolute;
  top: 40px;
  /*no*/
  left: 0;
  width: 175px;
  /*no*/
  height: 70px;
  /*no*/
  border: 1px solid #cfcfcf;
  /*no*/
  border-radius: 5px;
  /*no*/
  margin-left: -37.5px;
  /*no*/
  background-color: #fff;
}
.header .nav ul .contact .contact_box .angle {
  margin: auto;
  margin-top: -6px;
  /*no*/
  width: 12px;
  /*no*/
  height: 12px;
  /*no*/
  border-top-right-radius: 5px;
  /*no*/
  border-top: 1px solid #cfcfcf;
  /*no*/
  border-right: 1px solid #cfcfcf;
  /*no*/
  transform: rotateZ(-45deg);
  background-color: #fff;
}
.header .nav ul .contact .contact_box .contact_text {
  width: 100%;
  color: #4a4a4a;
  font-size: 17px;
  /*no*/
  text-align: center;
  display: flex;
  align-items: center;
  line-height: 28px;
  /*no*/
}