.menu {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 20px 0px;
}

@media only screen and (max-width: 767px) {
    nav {
        display: none ! important;
    }
    .menu {
        padding: 0px 0px;
    }
    .home-ban .ban-text .left::before {
        left: -90px;
        width: calc(100% + 70px);
    }
}