*{
    margin:0px;
    padding: 0px;
}
.nav{
    width: 1200px;
    height: 70px;
    background-color: #15244b;
    position: absolute;
    top: 0px;
    left: 50%;
    transform: translate(-50%,0);
}
.nav{
    display: flex;
    align-items: center;
}

.nav a{
    color: #3575C0;
    text-decoration: none;
    font-size: 20px;
    padding: 0px 30px;
    line-height: 75px;
    margin: 0 10px;
    font-family: MicrosoftYaHei;
}
.nav .ac{
    background-color: #13e2f4;
    color: #ffffff;
    height: 60px;
    line-height: 60px
}
.nav span{
    color: #ffffff;
    font-size: 20px;
}
.logo{
    margin: 0 20px;
}
.clearfix{overflow:auto;zoom:1}
.left{
    float:left;
}
.right{
    float: right;
}
a{
    text-decoration: none;
    color: #ffffff;
}
.footer{
    height: 120px;
    background: rgba(0,0,0,.5);
    text-align: center;
    color: #ffffff;
    padding: 55px;
    font-size: 18px;
}
.footer p{
    margin: 10px 0 ;
}
.footer p span{
    display: inline-block;
    width: 26px;
}