#header {
    position: relative;
}
#header, .header_fixed{
    height: 88px;
}
.header_fixed{
    background-color: #000;
    color: #fff;
    width: 100%;
    position: fixed;
    z-index: 10;
}
.header_content {
    height: 100%;
    width: 1000px;
    max-width: 100%;
    margin: auto;
    display: flex;
}
.header_content > div{
    padding: 0 20px;
}
.header_content > div:nth-child(1){
    text-align: left;
    flex-grow: 6;
    align-self: center;
    font-size: 20px;
    font-style: normal;
    font-weight: 600;
    height: 22px;
    letter-spacing: -1.5px;
}
.header_content > div:nth-child(2){
    text-align: right;
    flex-grow: 6;
    align-self: center;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.header_content > div:nth-child(2) a{
    font-size: 14px;
}
.main_content {
    width: 1000px;
    max-width: 100%;
    margin: auto;
    position: relative;
    height: calc(100% - 88px);
}
@media only screen and (max-width: 690px){
    #header, .header_fixed{
        height: 50px;
    }
    .main_content {
        padding: 20px 0;
    }
}