.header {
  width: 100%;
  height: 259px;
  background: url(../img/header-bg.png) no-repeat;
  background-size: cover;
}
.header .header-cont {
  width: 1200px;
  height: 100%;
  margin: 0 auto;
  position: relative;
}
.header .header-cont .logo {
  width: 223px;
  height: 93px;
  position: absolute;
  left: 0;
  top: 66px;
}
.header .header-cont .search-box {
  width: 310px;
  height: 40px;
  position: absolute;
  right: 0;
  top: 108px;
  border-radius: 6px;
}
.header .header-cont .search-box .search-logo {
  width: 17px;
  height: 17px;
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
}
.header .header-cont .search-box .search-input {
  width: 228px;
  height: 100%;
  box-sizing: border-box;
  padding-left: 41px;
  border-radius: 6px 0px 0px 6px;
  float: left;
  font-size: 16px;
}
.header .header-cont .search-box .search-btn {
  width: 82px;
  height: 100%;
  background: #1088dc;
  border-radius: 0px 6px 6px 0px;
  border: 0;
  font-family: Microsoft YaHei;
  font-weight: bold;
  font-size: 18px;
  color: #ffffff;
  display: inline-block;
  float: left;
  cursor: pointer;
}
.nav {
  width: 100%;
  height: 70px;
  background: #1088dc;
}
.nav .nav-box {
  width: 1200px;
  height: 100%;
  margin: 0 auto;
}
.nav .nav-box .nav-item {
  display: inline-block;
  float: left;
  height: 100%;
  padding: 23px 36px;
  font-family: Microsoft YaHei;
  font-weight: bold;
  font-size: 20px;
  color: #ffffff;
  box-sizing: border-box;
  text-decoration: none;
}
.nav .nav-box .nav-item:hover {
  background: #0667ab;
}
.nav .nav-box .active {
  background: #0667ab;
}
.topbg {
  width: 100%;
  min-width: 1200px;
}
.topbg img {
  width: 100%;
  display: block;
}