.time_line {
    display: flex;
    flex-direction: column;
    position: relative;
    --space: 50px;
    margin-top: 80px;
}

.time_line::before {
    content: "";
    display: inline-block;
    width: 1px;
    height: 100%;
    background-color: #dbdbdb;
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
}

.time_line li {
    width: calc(50% - var(--space));
    cursor: pointer;
}

.time_line li:nth-child(even) {
    align-self: flex-start;
    text-align: end;
}

.time_line li:nth-child(odd) {
    align-self: flex-end;
}

.time_line .date {
    position: relative;
    font-size: 38px;
    font-family: "Noto Sans CJK KR";
    font-weight: bold;
    color: #000002;
}

.time_line li:hover .date {
    color: rgb(28, 91, 178);
}

.time_line .date::before {
    content: "";
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: #dbdbdb;
    border-radius: 50%;
    position: absolute;
    top: 50%;
}

.time_line li:hover .date::before {
    background-color: #1c5bb2;
}

.time_line .date::after {
    content: "";
    display: none;
    width: 16px;
    height: 16px;
    background-color: #1c5bb233;
    border-radius: 50%;
    position: absolute;
    top: 50%;
}

.time_line li:hover .date::after {
    display: inline-block;
}

.time_line li:nth-child(even) .date::before {
    right: calc(0px - var(--space));
    transform: translate(50%, -50%);
}

.time_line li:nth-child(even) .date::after {
    right: calc(0px - var(--space));
    transform: translate(50%, -50%);
}

.time_line li:nth-child(odd) .date::before {
    left: calc(0px - var(--space));
    transform: translate(-50%, -50%);
}

.time_line li:nth-child(odd) .date::after {
    left: calc(0px - var(--space));
    transform: translate(-50%, -50%);
}

.time_line .descr {
    font-size: 18px;
    font-family: "Noto Sans CJK KR";
    color: rgb(117, 117, 117);
    line-height: 1.889;
}

@media screen and (max-width: 850px) {

    .history .greeting_main {
        padding: 3.4615rem 0 0;
    }

    .time_line {
        display: flex;
        flex-direction: column;
        position: relative;
        --space: 2.3077rem;
        margin-top: 2.6923rem;
        margin-bottom: 6.1538rem;
        --dot_width: 0.3077rem;
    }

    .time_line::before {
        content: "";
        display: inline-block;
        width: 1px;
        height: 100%;
        background-color: #dbdbdb;
        position: absolute;
        left: 10%;
        top: 0;
        transform: translateX(-50%);
    }

    /*.time_line_m::before {*/
    /*    content: "";*/
    /*    display: inline-block;*/
    /*    width: 1px;*/
    /*    height: 96%;*/
    /*    background-color: #dbdbdb;*/
    /*    position: absolute;*/
    /*    left: 10%;*/
    /*    top: 0;*/
    /*    transform: translateX(-50%);*/
    /*}*/

    .time_line li {
        width: calc(90% - var(--space));
        cursor: pointer;
        margin-top: 3.8462rem;
    }

    .time_line li:nth-child(even) {
        align-self: flex-end;
        text-align: start;
    }

    .time_line li:nth-child(odd) {
        align-self: flex-end;
    }


    .time_line .date {
        position: relative;
        font-size: 1.8462rem;
    }


    .time_line .date::before {
        content: "";
        display: inline-block;
        width: 0.3077rem;
        height: 0.3077rem;
        top: 50%;
    }


    .time_line .date::after {
        content: "";
        display: none;
        width: 0.6154rem;
        height: 0.6154rem;
    }

    .time_line li:hover .date::after {
        display: inline-block;
    }

    .time_line li:nth-child(even) .date::before {
        left: calc(0px - var(--space));
        transform: translate(-48%, -50%);
    }

    .time_line li:nth-child(even) .date::after {
        left: calc(0px - var(--space));
        transform: translate(-48%, -50%);
    }

    .time_line li:nth-child(odd) .date::before {
        right: calc(0px - var(--space));
        transform: translate(-50%, -50%);
    }

    .time_line li:nth-child(odd) .date::after {
        right: calc(0px - var(--space));
        transform: translate(-50%, -50%);
    }

    .time_line .descr {
        font-size: 1.0769rem;
        font-family: "Noto Sans CJK KR";
        color: rgb(117, 117, 117);
        line-height: 1.3;
        margin-top: 0.9615rem;
    }
}