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

    /* 開催情報について */
    #title {
        font-size: 44px;
        text-align: center;
        border-bottom: solid green 3px;
        width: 70%;
        margin: 50px auto 20px;
        padding-bottom: 6px;
    }

    .date-place {
        text-align: center;
        font-size: 20px;
        font-weight: bold;
    }

    /* レイアウト */
    .flex-wrap-ex {
        width: 80%;
        margin: 30px auto;
        padding: 0px;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .top-content {
        margin-block-start: 1em;
        margin-block-end: 1em;
        padding-inline-start: 20px;
        padding-inline-end: 20px;
        font-size: 20px;
    }

    .flex-wrap {
        justify-content: space-around;
    }

    .top-list {
        width: 35vw;
        padding: 0px;
        margin: 0px;
        display: inline-block;
        text-decoration: none;
    }

    /* 個々の項目 */
    .plan-h2 {
        width: 70vw;
        margin: auto;
    }

    #news-list {
        margin-block-start: 1em;
        margin-block-end: 1em;
        padding-inline-start: 40px;
        font-size: 19px;
        width: 85%;
        height: 10em;
    }

    #tech {
        width: 100%;
        height: 200px;
        margin-top: 60px 15px 15px 15px;
    }

    #tech-link {
        text-decoration: none;
        color: black;
        font-size: 22px;
        display: inline-flex;
        font-weight: bold;
    }

    #tech-img {
        height: 110%;
        width: auto;
        display: inline-block;
        margin-right: 5%;
    }

    #SNS {
        margin-top: 60px;
        width: 35vw;
        margin: 15px;
    }

    #instagram {
        height: 70px;
        width: 70px;
        padding: 7px;
        background-color: rgb(226, 17, 174);
        display: inline-block;
        box-sizing: border-box;
    }

    #twitter {
        height: 70px;
        width: 70px;
        padding: 5px;
        background-color: rgb(12, 148, 238);
        display: inline-block;
        box-sizing: border-box;
    }

    #twitter-img {
        position: relative;
        top: -3px;
        left: -2px;
        height: 110%;
        width: auto;
        text-align: center;
        margin: auto;
    }

    #youtube {
        height: 70px;
    }

    #facebook {
        height: 80px;
        width: 80px;
        margin: 0px 30px;
    }

    #mini-list {
        height: 200px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    .mini-list-letter {
        font-size: 33px;
        margin: 20px;
        font-weight: bold;
        text-decoration: none;
    }

    .mini-list-sideletter {
        font-size: 20px;
        margin: 20px;
        font-weight: bold;
        text-decoration: none;
    }

    #voiceactor {
        width: 40vw;
        height: auto;
        margin: 100px auto auto;
    }

    #voiceactor-img {
        width: 100%;
        height: auto;
    }
}