.partner-block {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
}

.partner-block a {
    width: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 16px;
    height: 50px;
    max-width: 19%;
}

@media only screen and (max-width: 480px) {
    .partner-block a {
        width: calc(50% - 8px);
        margin: 8px 0;
        height: 60px;
        max-width: inherit;
    }
}

.partner-block a img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
}

.kigyou-period {
    text-align: right;
}