.header_nav {
  background: rgba(3, 82, 148, 1);
}

.nav_ul {
  display: flex;
  justify-content: space-between;
  line-height: 60px;
  height: 60px;
}

.nav_ul li {
  width: 12%;
  text-align: center;
}

.nav_ul a {
  font-size: 22px;
  font-weight: 700;
  color: rgba(255, 255, 255, 1);
}

.nav_ul li:hover {
  background: rgba(3, 65, 115, 1);
}

.navon {
  background: rgba(3, 65, 115, 1);
}

.logo {
  margin: 44px auto 0px;
  text-align: center;
}

.logo img {
  width: 42%;
}

.header .search dl {
  position: relative;
  width: 100%;
  background-color: #fff;
}

.search {
  width: 76%;
  margin: 0 auto;
  position: relative;
}

.search::before {
  content: "";
  width: 100%;
  height: 107.58px;
  display: block;
  background: url(../images/public/head_bg.png) no-repeat center;
}

.header .search dl dd input[type="text"] {
  padding: 13px;
  height: 56px;
  width: 100%;
  font-size: 18px;
  color: #999;
  border: 0;
  vertical-align: top;
  background: rgba(255, 255, 255, 1);
  box-sizing: border-box;
  border: 1px solid rgba(25, 82, 132, 1);
}

.header .search dl dt.button {
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  height: 30px;
  line-height: 30px;
}

.header .search dl dt input.searchBtn {
  color: #fff;
  background: url(../images/public/search_icon.png) no-repeat center
    rgba(3, 82, 148, 1);
  -webkit-appearance: none;
  border: none;
  vertical-align: top;
  cursor: pointer;
  width: 115px;
  height: 56px;
  opacity: 1;
  background-size: 30px 30px;
}

@media (max-width: 1280px) {
  .nav_ul li {
    width: 16%;
  }
}

@media (max-width: 992px) {
  .nav_ul {
    flex-wrap: wrap;
    height: auto;
  }

  .nav_ul li {
    width: 33.3%;
  }
}

@media (max-width: 480px) {
  .nav_ul li {
    width: 50%;
  }

  .logo img {
    width: 81%;
  }

  .search {
    width: 90%;
  }

  .header .search dl dt.button {
    right: 34px;
  }

  .header .search dl dt input.searchBtn {
    width: 80px;
  }

  .search::before {
    height: 83.58px;
  }
}