body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    margin: 0;
}

h1 {
    text-align: center;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #f2f2f2;
}

.pagination button {
    padding: 8px 12px;
    margin: 0 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #fff;
    color: #333;
    cursor: pointer;
    transition: background-color 0.3s;
}

.pagination button:hover {
    background-color: #e1e1e1;
}

.pagination span {
    margin: 0 5px;
    font-weight: bold;
}

/* 默认情况下隐藏操作按钮 */
/*.operateAction .operateDisplay {*/
/*    display: none;*/
/*}*/

/*!* 当鼠标悬停在包含操作按钮的单元格上时显示操作按钮 *!*/
/*.operateAction:hover .operateDisplay {*/
/*    display: block;*/
/*}*/

/* 表头吸顶，滚动容器内生效 */
thead th {  
    position: sticky;
    top: 0;
    z-index: 2;
    background: #8aa0ee;
    color: #fff;
}

/* 滚动容器，避免使用 tbody display:block 破坏列对齐 */
.table-scroll {
    max-height: 65vh;
    overflow: auto;
}

/* 居中工具类 */
.text-center { text-align: center; }

/* 表格 tbody 单元格居中 */
#mediaRecord td { text-align: center; }
#record td { text-align: center; }
#fileRecord td { text-align: center; }

/* 媒体画廊（创造结果列） */
.media-gallery {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.media-gallery-track {
    display: flex;
    transition: transform 0.3s ease;
    will-change: transform;
}

.media-gallery-item {
    flex: 0 0 calc(100% / 3);
    box-sizing: border-box;
    padding: 4px;
}

/* 当图片数量少于3个时居中显示 */
.media-gallery.centered .media-gallery-track {
    justify-content: center;
}

.media-gallery.centered .media-gallery-item {
    flex: 0 0 auto;
    max-width: calc(100% / 3);
}

/* 当只有1个图片时，设置合适的宽度 */
.media-gallery.single-item .media-gallery-item {
    flex: 0 0 auto;
    max-width: 200px;
}

/* 当有2个图片时，设置合适的宽度 */
.media-gallery.double-item .media-gallery-item {
    flex: 0 0 auto;
    max-width: calc(50% - 8px);
}

.media-gallery-item img,
.media-gallery-item video {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 6px;
}

.media-gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(0,0,0,0.5);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    user-select: none;
}

.media-gallery-nav.prev { left: 6px; }
.media-gallery-nav.next { right: 6px; }

.media-gallery-nav[disabled] {
    opacity: 0.35;
    pointer-events: none;
}

/* 预览容器（图片/视频放大） */
.media-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: transparent;
}