@media (max-width: 768px) {
    .el_book_list {
        display: none !important;
    }
    .left_link {
        display: none !important;
    }
    .pc_login {
        display: none !important;
    }
    #new_books_header {
        display: none !important;
    }
}

@media (min-width: 769px) {
    .smp_login {
        display: none !important;
    }
}