.header {
    width: 100%;
    background-color: #161616;
    position: fixed;
    display: flex;
    top: 0;
    z-index: 999;
  }
  
  .header > div {
    width: 1180px;
    margin: 0 auto;
    height: 100%;
  }
  .header > div:first-child{
    height: 54px;
  }
  .header .logo {
    float: left;
    height: 100%;
    display: flex;
    align-items: center;
  }
  .header .logo img{
      width: 173px;
  }
  .header .nav {
    float: right;
  }
  .header .nav a {
    color: #AAAAAA;
    font-size: 14px;
    float: left;
    margin-left: 70px;
    line-height: 54px;
    height: 54px;
    text-decoration:none
  }
  .header .nav a:first-child {
    margin-left: 0;
  }
  .header .nav a:hover, .header .nav a.cur {
    color: #fff;
  }