.main-tit {
    font-size: 26px;
}
.head-nav .logo {
    max-width: 200px;
}
.head-nav .logo img {
    width: 96%;
    max-width: 100%;
}
.nav-box .nav-li {
    padding: 0 15px;
}
.head-nav .head-nav-con {
    max-width: 1740px;
    width: 98%;
}
@media screen and (max-width: 1540px) {
    .head-nav .logo {
        max-width: 180px;
    }
    .nav-box .nav-li > a {
        font-size: 14px;
    }
    .head-nav .head-btn .btn {
        font-size: 13px;
        padding: 8px 8px;
    }
}

@media screen and (max-width: 1366px) {
    .nav-box .nav-li {
        padding: 0 10px;
    }
}