@media (max-width: 650px) {
    .mypage-container {
        &.problem-detail-container {
            > .sec-width {
                padding: 0;
                .breadcrumb {
                    padding: 0 20px;
                }
            }
            .problem-detail-wrap {
                .problem-detail-head {
                    padding-top: 0;
                }
            }
        }
    }
}