.header {
    width: 100%;
    max-width: 800
px
;
    height: 60
px
;
    line-height: 60px;
    font-size: 14px;
    color: #fff;
    background: #8A2BE2;
    margin: auto;
    left: 0;
    right: 0;
    top: 0;
    z-index: 2;
}