.file_label {
    position: relative;
    cursor: pointer;
    font-weight: normal;
    display: inline-block;
}

.file_label > input {
    width: 70px;
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
}

.file_label > img {
    width: auto;
    height: auto;
    max-height: 100px;
    background-color: white;
    border: 1px solid #e4e7ed;
    position: relative;
    z-index: 1;
}
.file_label>.hover-tip{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    justify-content: center;
    align-items: center;
    background-color: rgba(0,0,0,0.3);
    font-size: 14px;
    color: white;
    display: none;
}
.file_label:hover>.hover-tip{
    display: flex;
}