@media (max-width:280px) {
    /* body */
    body{
        margin: 0;
        padding: 0;
        width: 100vw;
    }
    .body{
        width: 100%;
        overflow: hidden;
        position: relative;
    }

    /* ヘッダー */
    header{
        position: fixed;
        top: 0;
        z-index: 999;
        width: 100vw;
        height: 34px;
        background-color: white;
        box-shadow: 0 0 8px gray;
    }
    #Genie_header{
        display: flex;
        justify-content: space-between;
    }
    #Genie_header h1{
        margin: 8% 0 2% 20%;
        font-family: serif;
        font-size: 18px;
    }
    /* ハンバーガーメニュー */
    .hamburger{
        width: 16px;
        height: 10px;
        position: relative;
        margin: 0 0 0 auto;
        top: 12px;
        right: 4%;
    }
    .hamburger span{
        margin: 0;
        position: absolute;
        width: 100%;
        height: 1px;
        background-color: black;
        border-radius: 15px;
    }
    .hamburger span:first-of-type{
        top: 0;
    }
    .hamburger span:nth-of-type(2){
        top: 50%;
    }
    .hamburger span:last-of-type{
        top: 100%;
    }
    /* /ここまでハンバーガーメニュー */
    #header_list{
        overflow-x: hidden;
        flex-flow: column;
        position: absolute;
        top: 34px;
        width: 100%;
        height: 160px;
        left: 0;
        text-align: center;
        background-color: #1a1a1a;
        padding: 0;
        margin: 0;
        transform: translateX(100%);
        transition: .5s;
        list-style: none;
    }
    #header_list a{
        font-size: 10px;
        font-family: serif;
        color: #ccc;
        line-height: 400%;
        padding: 0;
        text-decoration: none;
    }
    #header_list a:hover{
        text-decoration: underline;
        color: white;
    }
    .hamburger.active span:first-of-type{
        top:50%;
        transform: rotate(405deg);
        transition: .5s;
    }
    .hamburger.active span:nth-of-type(2){
        opacity: 0;
    }
    .hamburger.active span:last-of-type{
        top:50%;
        transform: rotate(-405deg);
        transition: .5s;
    }
    #header_list.active{
        transform: translateX(0);
        transition: .5s;
    }

    /* TOP画面 */
    #top{
        position: relative;
        margin-top: 34px;
        width: 100%;
    }
    #top_img{
        width: 100%;
        max-width: 100%;
        position: absolute;
        animation :imgfade 25s infinite;
        opacity: 0;
    }
    @keyframes imgfade {
        0%{
            opacity: 0;
        }
        10%{
            opacity: 0.6;
        }
        20%{
            opacity: 0.6;
        }
        30%{
            opacity: 0;
        }
        100%{
            opacity: 0;
        }
    }
    #top img:nth-of-type(1){
        animation-delay: 0s;
    }
    #top img:nth-of-type(2){
        animation-delay: 5s;
    }
    #top img:nth-of-type(3){
        animation-delay: 10s;
    }
    #top img:nth-of-type(4){
        animation-delay: 15s;
    }
    #top img:nth-of-type(5){
        animation-delay: 20s;
    }
    #top h1,#top p{
        position: relative;
    }
    #top h1{
        padding-top: 14%;
        left: 45%;
        font-size: 20px;
        font-weight: bold;
        color: black;
        line-height: 120%;
        font-family: serif;
    }
    #top p{
        top: 50%;
        left: 45%;
        margin-right: 55%;
        font-size: 8px;
        line-height: 16px;
        color: black;
        font-family: sans-serif;
    }
    h2{
        font-size: 16px;
        font-family: serif;
        display: flex;
        align-items: center;
        padding-top: 12%;
        margin-top: -2%;
        margin-bottom: 4%;
    }
    h2:before,h2:after{
        content: "";
        height: 1px;
        flex-grow: 1;
        background-color: black;
        margin-left: 20px;
        margin-right: 20px;
    }
    h2:before{
        margin-right: 10px;
    }
    h2:after{
        margin-left: 10px;
    }

    /* Corporate Philosophy（企業理念） */
    #corporate{
        margin-top: 14%;
    }
    #corporate p{
        font-size: 8px;
        line-height: 16px;
        padding-left: 10%;
        padding-right: 10%;
        color: black;
        font-family: sans-serif;
    }

    /* Business（事業内容） */
    .business{
        background-color: rgb(250, 250, 200, 0.2);
        margin: 5% 5% 0 5%;
        padding: 2% 7% 5% 7%;
        box-shadow: 0 0 8px gray;
    }
    .business_retail{
        margin-bottom: 50px;
        display: flex;
        display: -webkit-box;
    }
    .business_retail h3,
    .business_training h3{
        font-size: 16px;
        font-family: serif;
        text-decoration: underline;
        text-decoration-thickness: 1px;
        margin-bottom: 0;
    }
    .business_retail p{
        margin-left: 7%;
        width: 90%;
        font-size: 8px;
        line-height: 16px;
        font-family: sans-serif;
    }
    .retail_text{
        display: flex;
        flex-flow: column;
        width: 55%;
    }
    .business_retail img{
        width: 30%;
        position: absolute;
        left: 58%;
        margin-top: 35px;
        float: right;
        padding: 5px;
        border-top: 1px solid #ccc;
        border-left: 1px solid #ccc;
        border-right: 1px solid #c2c2c2;
        border-bottom: 1px solid #c2c2c2;
        box-shadow: 0 0 8px gray;
        background: #fff;
    }
    *{
        box-sizing: border-box;
    }
    .training_item{
        position: relative;
        overflow: hidden;
        width: 100%;
    }
    .school_img{
        width: 100%;
    }
    .training_item p{
        font-size: 8px;
        position: absolute;
        top: 10%;
        margin-left: 7%;
        padding: 10px 20px 10px 10px;
        background-color: rgba(255, 255, 255, 0.7);
        border-radius: 7px;
        font-family: sans-serif;
    }

    /* About（企業情報） */
    #about{
        margin-bottom: 70px;
    }
    .about_list{
        height: 250px;
        border-spacing: 0;
        border-top: 1px solid silver;
        width: 85%;
        margin: 0 auto;
    }
    .about_list01{
        width: 35%;
        text-align: center;
    }
    .about_list02{
        width: 65%;
    }
    .about_list td{
        border-bottom: 1px solid silver;
        font-size: 8px;
        font-weight: 100;
        color: black;
        font-family: sans-serif;
    }


    /* フッター */
    footer{
        background-color: #1a1a1a;
        display: flex;
        flex-flow: column;
        justify-content: center;
        align-items: center;
        margin-bottom: 0;
    }
    .footer_item{
        display: flex;
        justify-content: space-between;
        padding-top: 6%;
        padding-bottom: 4%;
        width: 100%;
    }
    .footer_item01 a,
    .footer_item02 a{
        display: flex;
        color: #ccc;
        font-family: serif;
        font-size: 8px;
        text-decoration: none;
    }
    .footer_item01{
        margin-left: 12%;
    }
    .footer_item02{
        margin-right: 12%;
    }
    .footer_item03{
        display: flex;
        margin-bottom: 2%;
    }
    .footer_item a{
        text-decoration: none;
        padding-bottom: 6%;
    }
    .footer_item a:hover{
        text-decoration: underline;
        color: white;
    }
    footer h4{
        color: #ccc;
        font-family: serif;
        font-size: 8px;
        transform: scale(0.8);
        transform-origin: center;
    }
}