/* 学习视频管理页面样式补充 */
#video-table th:nth-child(2), #video-table td:nth-child(2) {
    width: 60px;
    text-align: center;
}

#video-table th:nth-child(4), #video-table td:nth-child(4) {
    width: 120px;
    text-align: center;
}

#video-table th:nth-child(5), #video-table td:nth-child(5) {
    width: 100px;
    text-align: center;
}

#video-table th:nth-child(6), #video-table td:nth-child(6) {
    width: 130px;
    text-align: center;
}

#video-table th:nth-child(7), #video-table td:nth-child(7) {
    width: 100px;
    text-align: center;
}

#video-table th:nth-child(8), #video-table td:nth-child(8) {
    width: 100px;
    text-align: center;
}

#video-table th:last-child, #video-table td:last-child {
    width: 150px;
    text-align: center;
}

/* 视频时长格式化样式 */
.duration-format {
    color: #666;
    font-size: 13px;
}

/* 视频封面预览 */
.cover-preview {
    width: 100px;
    height: 60px;
    margin-top: 10px;
    border-radius: 4px;
    object-fit: cover;
    display: none;
}