.post-detail_header {
    margin-top: 40px;
    border-top: solid 1px #ccc;
    border-bottom: solid 1px #ccc;
}
.post-detail_category {
    border-right: solid 1px #ccc;
    font-family: 'Times New Roman', Times, serif;
    font-size: 21px;
}
.post-detail_title {
    font-family: 'Times New Roman', Times, serif;
    font-size: 21px;
}

textarea img, iframe {
    max-width: 100%;
}

.post-detail_content table a {
    color: blue !important;
    text-decoration: underline;
}

@media (max-width: 768px) {
    .post-detail_category {
        font-size: 24px;
        font-weight: bold;
        text-align: center;
        margin-bottom: 16px;
        padding-bottom: 24px;
        border-right: none;
        border-bottom: 1px #ccc solid;
    }

    .post-detail_header {
        margin-top: 0;
    }

    .post-detail_title {
        font-size: 16px;
        text-align: center;
    }
}