header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 7% 0 7%;
  position: fixed;
  top: 0;
  box-sizing: border-box;
  height: 72px;
  z-index: 99;
  background: #fff;
}
header .logo {
  width: 15%;
  height: 100%;
  padding-right: 2%;
  box-sizing: border-box;
  display: flex;
  align-items: center;
}
header .logo img {
  max-width: 100%;
  vertical-align: text-bottom;
  max-height: 88%;
}
header .logo .h_logo {
  display: block;
}
header .nav {
  width: 60%;
  height: 100%;
  display: flex;
}
header .nav > li {
  flex: 1;
  height: 72px;
  line-height: 72px;
  text-align: center;
  position: relative;
}
header .nav > li > a {
  color: #555;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.3s;
  position: relative;
  padding: 6px 0;
}
header .nav > li .son {
  width: 100%;
  background: #FFFFFF;
  position: absolute;
  left: 0;
  top: 72px;
  display: none;
}
header .nav > li .son a {
  display: block;
  color: #666;
  height: 40px;
  line-height: 40px;
  font-size: 13px;
}
header .nav > li .son a:hover {
  color: #2E4AB4;
}
header .right {
  display: flex;
  height: 100%;
}
header .right .img {
  padding: 0 35px;
  border-left: 1px solid #e1e1e15c;
  display: flex;
  align-items: center;
  cursor: pointer;
  display: none;
}
header .right .img img {
  width: 24px;
}
header .right .img .black {
  display: none;
}
header .right .phone {
  color: #1a3a6b;
  font-size: 14px;
  font-weight: 600;
  line-height: 72px;
}
header .right .phone a {
  color: #1a3a6b;
  font-size: 14px;
  font-weight: 600;
  line-height: 72px;
  display: block;
}
.menu_big {
  width: 100%;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 100%;
  z-index: 999;
  background: rgba(46, 74, 180, 0.85);
  padding: 50px;
  box-sizing: border-box;
  clear: both;
  transition: all 0.5s;
}
.menu_big .close {
  text-align: center;
  font-size: 12px;
  color: #FFFFFF;
  width: 50px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  float: right;
  clear: both;
  cursor: pointer;
}
.menu_big .menu_logo {
  display: block;
  margin: 150px auto 100px;
  vertical-align: text-bottom;
}
.menu_big ul {
  display: flex;
  justify-content: center;
}
.menu_big ul li {
  width: 12%;
  padding-left: 15px;
  border-left: 1px solid #FFFFFF;
  box-sizing: border-box;
}
.menu_big ul li a {
  display: block;
  color: #FFFFFF;
  font-size: 14px;
  line-height: 30px;
}
.menu_big ul li a.top {
  margin-bottom: 20px;
  font-size: 16px;
  font-weight: bold;
}
.menu_big .search {
  display: flex;
  justify-content: center;
  margin-top: 100px;
}
.menu_big .search input {
  height: 40px;
  border: none;
  outline: none;
  background: #FFFFFF;
  width: 300px;
  padding: 0 10px;
  box-sizing: border-box;
}
.menu_big .search .btn {
  width: 80px;
  border-left: 1px solid #ddd;
  color: #fff;
  cursor: pointer;
  background-color: #2E4AB4;
}
@media screen and (max-width: 768px) {
  header {
    height: 60px;
    padding-left: 2%;
    padding-right: 2%;
    background: #fff;
  }
  header .logo {
    width: 30%;
    border-right: none;
  }
  header .nav {
    display: none;
  }
  header .right .img {
    padding: 0 10px;
    display: flex;
  }
  header .right .img .black {
    display: block;
  }
  header .right .phone {
    padding: 0 10px;
    display: flex;
    height: 60px;
    line-height: 60px;
  }
  header .right .phone a {
    height: 60px;
    line-height: 60px;
  }
  .menu_big {
    padding: 10px;
    background: rgba(26, 58, 107, 0.95);
  }
  .menu_big .menu_logo {
    width: 35%;
    margin: 70px auto 15px;
  }
  .menu_big ul {
    flex-direction: column;
  }
  .menu_big ul li {
    border-left: none;
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    border-bottom: 1px dashed #8299be;
    padding: 5px 0;
    box-sizing: border-box;
  }
  .menu_big ul li a {
    display: inline-block;
    margin-right: 20px;
  }
  .menu_big ul li a.top {
    display: block;
    width: 100%;
    margin-bottom: 0;
  }
  .menu_big .search {
    margin-top: 20px;
  }
}