.oi_sp-none{
    display: none;
}
.oi_pc-none{
    display: block;
}
@media screen and (min-width: 768px) {
    .oi_sp-none{
        display: block;
    }
    .oi_pc-none{
        display: none;
    }
}

/* 背景画像 */
.oi-container{
    position: relative;
    width: 375px;
}
.oi-inner{
    top: 0;
    left: 0;
    width: 100%;
    clip-path: inset(0);
}
.oi-bg::before{
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100%;
    background-color: #f2f2f2;
    background-image: url(/challenge/innovation/images/img_bg_sp.png);
    background-size: 100%;
    background-position-y: 0;
    z-index: -1;
}
@media screen and (min-width: 768px) {
    #content-body .section{
        width: 100vw;
    }
    .oi-bg::before{
        background-image: url(/challenge/innovation/images/img_bg_pc.png);
    }
}


/* ページ・コンテンツブロックタイトル */
.oi-contents-title{
    width: 100%;
    border-bottom: 3px solid;
    border-image: linear-gradient(-90deg, #40C8F4, #0071BC) 1;
    margin-bottom: 30px;
}
.oi-contents-title__text{
    font-size: 150%;
    font-weight: bold;
    background: linear-gradient(-90deg, #40C8F4, #0071BC);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    color: #0071BC;
    position: relative;
}
.oi-contents-title__text::before{
    content: "";
    display: block;
    height: 59px;
    background-repeat: no-repeat;
    background-size: contain;
    position: absolute;
    top: 2px;
    left: -44px;
}
.oi-contents-title__text--cases::before{
    width: 210px;
    background-image: url(/challenge/innovation/images/img_cases_01.png);
    top: -9px;
}
.oi-contents-title__text--vision:before{
    width: 557px;
    background-image: url(/challenge/innovation/images/img_vision_01.png);
    top: -10px;
}
.oi-contents-title__text--release::before{
    width: 649px;
    background-image: url(/challenge/innovation/images/img_release_01.png);
}
@media screen and (min-width: 768px) {
    .oi-contents-title__text{
        font-size: 286%;
        line-height: 1.3;
        margin-bottom: 10px;
    }
    .oi-contents-title__text::before{
        height: 211px;
        top: -80px;
        left: -264px;
    }
    .oi-contents-title__text--cases::before{
        width: 754px;
    }
    .oi-contents-title--vision{
        margin-bottom: 62px;
    }
    .oi-contents-title__text--vision:before{
        width: 2030px;
        top: -50px;
    }
    .oi-contents-title--release{
        margin-bottom: 62px;
    }
    .oi-contents-title__text--release::before{
        width: 2324px;
        top: -50px;
    }
}



/* TOPページへ戻るボタン */
.oi-back-btn__link{
    display: block;
    width: 180px;
    height: 42px;
    margin: 50px 0 0 auto;
    border: #000000 solid 2px;
    border-radius: 23px;
}
.oi-back-btn__text{
    display: flex;
    align-items: center;
    justify-content: flex-end;
    font-size: 117%;
    font-weight: bold;
    text-align: center;
    color: #000000;
    padding: 8px;
}
.oi-back-btn__text::after{
    content: "";
    display: block;
    width: 28px;
    height: 28px;
    background-image: url(/challenge/innovation/images/img_back-btn_icon.png);
    background-repeat: no-repeat;
    background-size: contain;
    margin-left: 8px;
}
@media screen and (min-width: 768px) {
    .oi-back-btn__link{
        width: 226px;
        height: 52px;
        margin-top: 110px;
        border-radius: 28px;
        overflow: hidden;
        position: relative;
        z-index: 1;
    }
    .oi-back-btn__text{
        font-size: 114%;
        padding: 12px;
        transition: 0.3s all;
    }
    .oi-back-btn__text::after{
        width: 32px;
        height: 32px;
        margin-left: 16px;
        position: relative;
        top: -2px;
        transition: 0.3s all;
    }
    .oi-back-btn__link:hover{
        text-decoration: none;
    }
    .oi-back-btn__link::before{
        background: #000000;
        position: absolute;
        top: 0;
        left: 0;
        content: '';
        width: 100%;
        height: 250%;
        transform: skewY(-30deg) scale(1, 0);
        transform-origin: left top;
        transition: .2s cubic-bezier(0.45, 0, 0.55, 1);
        z-index: -1;
    }
    .oi-back-btn__link:hover::before{
        transform: skewY(-10deg) scale(1, 1);
    }
    .oi-back-btn__link:hover .oi-back-btn__text{
        color: #FFFFFF;
    }
    .oi-back-btn__link:hover .oi-back-btn__text::after{
        background-image: url(/challenge/innovation/images/img_back-btn-hover_icon.png);
    }
}