.public_w {
  max-width: 1400px;
  width: 85%;
  margin: 0 auto;
}

.header{
  width: 100%;
  height: calc(40px + 2.5rem);
  /* border: 1px solid #000; */
}
.header .head_navBox {
  width: 90%;
  height: 100%;
  display: flex;
  align-items: center;
}
.header .head_navBox>.logo img{
  width: calc(133px + 10rem);
}
.header .head_navBox>div{
  /* width: 90%; */
  flex: 1;
  height: 100%;
  display: flex;
  justify-content: space-between;
  margin-left: calc(60px + 5rem);
}
.header .head_navBox .nav {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header .head_navBox .nav li:nth-last-of-type(1){
  margin-right: 0;
}
.header .head_navBox .head_nav {
  flex: 1;
  position: relative;
  /* width: calc(100px + 1rem); */
  height: 100%;
  /* margin-right: 2.5rem; */
  /* margin-right: calc(24px + 2.5rem); */
  transition: 0.3s;

}
.header .head_navBox .head_nav a {
  display: flex;
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: center;
  font-size: calc(10px + 0.4rem);
  font-family: PingFang_SC;
  font-weight: 500;
  color: #252525;
}
.header .head_navBox .head_nav.ativeHove>a,
.header .head_navBox .head_nav:hover>a{
  color: #e60012;
}


.header .head_navBox .head_nav .drop_down {
  width: 100%;
  position: absolute;
  top: 100%;
  left: 0;
  display: none;
  z-index: 500;
  background: #fff;
  /* border: 1px #f00 solid; */
}
.header .head_navBox .head_nav .drop_down > li {
  width: 100%;
  height: calc(25px + 1rem);
  font-size: calc(7px + 0.35rem);
  color: #252525;
}
.header .head_navBox .head_nav .drop_down > li > a {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(10px + 0.3rem);
}
.header .head_navBox .head_nav .drop_down > li:hover>a {
  /* background: #0069b8; */
  color: #e60012;
}