.pic-preview-box{
    width: 200px;
    height: 200px;
    background: #fff;
    border: 1px solid #ddd;
    box-shadow: 0 2px 6px rgba(0,0,0,.15);
    position: absolute;
    display: none;
    overflow: hidden;
    box-sizing: border-box;
    z-index: 9999;
}
.pic-preview-box .img-box{
    height: 170px;          /* 给文字留 30px */
    display: flex;
    align-items: center;
    justify-content: center;
}
.pic-preview-box img{
    max-width: 100%;
    max-height: 100%;
}
.pic-preview-box .img-tip{
    height: 30px;
    line-height: 30px;
    text-align: center;
    font-size: 12px;
    color: #666;
    background: #fff;
}

.tables:hover {
    background: #ccc;
}