@charset "UTF-8";
#history .sub_image {
    position: absolute;
    left: 0;
    z-index: 0;
    margin-top: 5rem;
}

#history .sub_image img {
    width: 100%;
    max-width: 1000px;
}

.history_list {
    width: 100%;
    position: relative;
    z-index: 100;
    margin-top: 3rem;
}

.history_list dl {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}

.history_list dt {
    font-size: 2.8rem;
    letter-spacing: 2px;
    text-align: right;
}

.history_list dd {
    margin-bottom: 0;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 2rem;
}

.history_list dd .month {
    border-bottom: 1px solid;
    margin-right: 1rem;
}

.history_list dd .txt {
    font-weight: 600;
    font-size: 1.1rem;
}

.company_list ul {
    list-style: none;
    margin: 0;
    padding: 0 0 0 1.2em;
}

.company_list ul li {
    text-indent: -1.25em;
}

.company_list ul li:before {
    content: "●";
    padding-right: 0.1em;
}

.company_list {
    margin: 3rem 0 0 auto;
    width: 100%;
}

.company_list dl {
    padding: 2rem;
    position: relative;
    display: flex;
    background: #eee;
}

.company_list dl:nth-of-type(2n) {
    background: #ddd;
}

.company_list dt {
    margin-bottom: 0.5rem;
    width: 10rem;
}

.company_list dd {
    margin-bottom: 0;
}

.company_list dd div {
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.company_list dd ul {
    margin-bottom: 1.5rem;
}

@media screen and (max-width: 780px) {
    #introduction {
        margin-top: 0;
    }

    .company_list dl {
        display: block;
        padding: 1rem;
    }

    .company_list dt {
        margin-bottom: 1rem;
    }
}