html {
        font-size: 100%;
        /* 16px */
    }
    
    body {
        font-family: 'Noto Sans JP', "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
        ;
        color: #727171;
        font-weight: 300;
        letter-spacing: 1px;
    }
    /* 初期設定解除 */
    
    a {
        text-decoration: none;
        color: #4c4948;
    }
    
    a:focus {
        outline: none;
    }
    
    p {
        font-size: 1rem;
        padding-bottom: 10px;
    }
    
    h1 {
        font-size: 1.3rem;
        font-weight: 400;
        padding-bottom: 20px;
        text-align: center;
    }
    
    h2 {
        font-size: 1.1rem;
        font-weight: 400;
        padding-bottom: 5px;
    }
    
    img {
        border: none;
        max-width: 100%
    }
    
    ul {
        padding: 0px;
    }
    
    li {
        list-style: none;
        font-size: 1rem;
    }
    
    dt,
    dd {
        padding: 10px 20px;
    }
    /* ここから個別設定 */
    
    .wrapper {
        max-width: 960px;
        margin: 0 auto;
        padding: 0px 25px;
        line-height: 170%;
    }
    /* ナビ */
    
    .nav {
        margin-top: 20px;
        display: flex;
        justify-content: flex-end;
        align-items: center;
    }
    
    .nav ul {
        display: flex;
        justify-content: flex-end;
    }
    
    .nav ul li {
        margin-right: 10px;
        display: flex;
        align-items: center;
    }
    
    .nav ul li img {
        margin-right: 5px;
    }
    /* バックナンバー */
    
    .backno_title {
        font-size: 1.8rem;
        font-weight: 700;
        vertical-align: middle;
        margin: 10px 0px 20px 0px;
        text-align: center;
    }
    
    .backno_title span {
        font-size: 1rem;
        vertical-align: middle;
        color: darkgreen;
    }
    
    .backno_box {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
    }
    
    .backno_box_xxx {
        width: 24%;
        height: auto;
        margin-bottom: 10px;
    }
    
    .backno_box_coming {
        width: 24%;
        height: auto;
        margin-bottom: 10px;
        position: relative;
    }
    
    .backno_box_empty {
        width: 24%;
        height: auto;
        margin-bottom: 10px;
    }
    
    .backno_box_coming img {
        opacity: .3;
    }
    
    .backno_box_coming span {
        white-space: nowrap;
        font-weight: 400;
        position: absolute;
        opacity: 1;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        -webkit-transform: translate(-50%, -50%);
        -ms-transform: translate(-50%, -50%);
    }
    
    .backno_box img {
        width: 100%;
        height: auto;
    }
    /*--------------------------------
// レスポンシブル
----------------------------------*/
    
    @media screen and (max-width: 600px) {
        .wrapper {
            width: 100%;
            margin: 0 auto;
        }
        .nav {
            margin-top: 10px;
        }
        .backno_title {
            margin: 0px 0px 20px 0px;
        }
        .backno_box {
            width: 100%
        }
        .backno_box_xxx {
            width: 48%;
            height: auto;
            margin-bottom: 10px;
        }
        .backno_box_coming {
            width: 48%;
            height: auto;
            margin-bottom: 10px;
        }
        .backno_box_coming span {
            font-size: .8rem;
        }
        .backno_box_empty {
            display: none;
        }
        .nav .box {
            width: 35%;
        }
    }