.nav-box {
  height: 36px;
  border-bottom: 1px solid #e5e9ea;
  -webkit-box-shadow: 0px 1px 2px 0px rgba(0, 0, 0, 0.05);
          box-shadow: 0px 1px 2px 0px rgba(0, 0, 0, 0.05);
}

.nav-container {
  line-height: 36px;
  background-color: #fff;
}

.nav_phone,
.nav_title {
  color: #999;
}

.nav_phone {
  margin-left: 40px;
}

.search_right {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  float: right;
  height: 100%;
  font-size: 15px;
  color: #999;
}

.search_ielts, .search_toefl {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  margin-right: 30px;
}

.search_ielts::before, .search_toefl::before {
  content: '';
  margin-right: 5px;
  width: 30px;
  height: 27px;
  background: url(../img/teach_icon01.png) center no-repeat;
}

.search_toefl::before {
  background: url(../img/teach_icon02.png) center no-repeat;
}

.search_phone {
  font-size: 34px;
  font-weight: bolder;
  color: #1a7af8;
}

.search_phone::before {
  margin-right: 10px;
  width: 34px;
  height: 34px;
  background: url(../img/teach_icon03.png) no-repeat;
}
.index_nav {
  font-size: 14px;
  width: 1200px;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
 // padding-left: 260px;
  line-height: 40px;
  margin: 0 auto
}

.index_nav_item {
  display: inline-block;
  padding: 0 25px
}

.index_nav_link {
  font-size: 16px;
  color: #fff;
  -webkit-transition: all .2s ease-in-out;
  transition: all .2s ease-in-out
}

.index_nav_link:hover {
//  color: #4a97ff
}

.index_nav_item:first-child{
margin-left: -10px;
}

.index_container_A {
    background: #4A97FF;
}
.index_nav_item:hover {
	position: relative;
}
.index_nav_item:hover .nav_down_link {
	display: block;
}
.nav_down_item {
  top: 40px;
  position: absolute;
  margin: auto;
  z-index: 3;
  white-space: nowrap;
  background: 0 0;
  text-align: left;
}
.nav_down_link {
  display: none;
  min-width: 92px;
  padding: 0 16px;
  font-size: 14px;
  height: 40px;
  background: #fff;
  border-bottom: 1px solid #fff;
}
.nav_down_link:hover {
	color: #4a97ff;
}