.header{
    position: fixed;
    z-index: 1000;
    top:0;
    width: 100%;
    height: 74px;
    background-color: #65ACCA ! important;
    text-align: center;
    font-size: 15px;
    color: #ffffff;
    -moz-user-select: none;
    -webkit-user-select: none;
}
.header .heart {
    width: 999px;
    height: 100%;
    margin: 0 auto;
    position: relative;
}

.header .logo_img {
    position: absolute;
    height: 60px;
    top: 30%;
    margin-top: -16px;
    margin-left: -8%;
    left: 0;
}

.nav{
    height:100%;
    width:100%;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-end;
    align-items: center;
}


.nav .box{
    width:47px;
    height:100%;
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
}
.nav .map_box{
    margin-left: 22px;
}
.nav .matrix_box{
    margin-left: 22px;
}
.nav .split{
    width:1px;
    height: 30px;
    margin-left: 22px;
    background-color: #FFFFFF;
}
.nav .polity_box{
    margin-left: 22px;
}
.nav .burst_box{
    margin-left: 22px;
}
.nav .login{
    margin-left: 22px;
    width: 68px;
    height: 30px;
    color: #ffffff;
    line-height: 30px;
    border-left: 1px solid #fff;
    border-right: 1px solid #fff;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}



.nav .box img{
    width:34px;
    height:34px;
    margin-bottom: 5px;
}

.nav .choice span{
    color: #FFFFFF;
}

.nav .box:hover{
    cursor: pointer;
}