/* 缩略图 */
main .thumbnail_box {
    position: fixed;
    top: 0px;
    left: 0px;
    background: rgba(0, 0, 0, 0.4);
    width: 100%;
    height: 100%;
    z-index: 101;
    color: #ffffff;
    display: none;
}

main .thumbnail_box .thumbnail_list_box {
    width: 100%;
    height: 70%;
    position: absolute;
    top: 15%;
    left: 0px;
    padding: 0px 20px;
    overflow-x: hidden;
    overflow-y: auto;

    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 20px;
}

main .thumbnail_box .thumbnail_list_box .thumbnail_item_box {
    width: 100%;
    height: fit-content;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #ffffff;
}

main .thumbnail_box .thumbnail_list_box .thumbnail_item_box .thumbnail_img {
    width: 100%;
    border: 2px solid #0f71ac;
    margin-bottom: 5px;
}

main .thumbnail_box .thumbnail_close_box {
    width: 30px;
    height: 30px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    padding: 4px;
    position: absolute;
    left: calc(50% - 15px);
    bottom: 10%;
}