.n-page-desc{
    width: 1400px;
    margin: 16px auto 0;
}

#anli-1 .n-anli-content {
    padding: 16px 24px 16px 0px;
}
#challenge2 .n-challenge-content {
    align-items: flex-start;
}
.n-products {
    justify-content: center;
}
#contactus {
    margin: 0px 0 0;
}
@media screen and (max-width: 1600px) {
    .n-page-desc{
        width: 1200px;
    }
}
@media screen and (max-width: 1280px) {
    .n-page-desc{
        width: 1080px;
    }
}
@media screen and (max-width: 768px) {
    .n-page-desc{
        width: 100%;
        padding: 0 20px;
    }
}