header{
    width: 100vw;
    height: 46px;
    background-color: rgba(255,255,255,0.7);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 500;
}
header .header-content{
    margin: 0 auto;
    width: var(--hualu-content-width-m);
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 7px;
}