*{
    margin: 0;
    padding: 0;
    list-style: none;
    text-decoration: none;
}

.w{
    width: 1200px;
    margin: 0 auto;
}

.title{
    text-align: center;
    margin: 60px auto 40px;
}
.title h2{
    font-size: 24px;
    color: #333;
}
.title .line{
    width: 56px;
    height: 4px;
    background: #333;
    margin: 10px auto 0;
}

@media screen and (max-width: 1330px){
    .w{
        width: 636px;
        margin: 0 auto;
    }
    .nav{
        display: none;
    }
}
@media screen and (max-width: 768px){
    .w{
        width: 348px;
        margin: 0 auto;
    }
}