/* オフィス紹介
 */
.about_top {
    width: 100%;
    height: 380px;
    text-align: center;
}

.about_top img {
    max-width: 1920px;
    width: 100%;
}

.about_title {
    text-align: center;
    font-size: 4rem;
    font-family: "Italianno","Adobe Handwriting Ernie", 'BIZ UDPGothic', sans-serif;
    opacity: 20%;
    margin-top: 70px;
}

/* 大阪 */

.osaka,
.tokyo,
.RD {
    text-align: center;
    margin: 180px 5% 0;
}

.osaka {
    margin-top: 100px;
}

.osaka_title h1,
.tokyo_title h1,
.RD_title h1 {
    font-size: 2.5rem;
    text-align: initial;
}

.osaka_title p,
.tokyo_title p,
.RD_title p {
    font-size: 1.25rem;
    margin-top: 39px;
    line-height: 35px;
    text-align: initial;
}

.osaka_title p:last-child,
.tokyo_title p:last-child,
.RD_title p:last-child {
    font-size: 1.25rem;
    line-height: 35px;
}

.osaka_img,
.tokyo_img,
.RD_img {
    margin-top: 40px;
}

.osaka .osaka_title a,
.tokyo .tokyo_title a,
.RD .RD_title a:visited {
    color: blue;
}

/* スライドショーの周りの要素 */
.hako_slide {
    width: 80%;
    max-width: 1400px;
    margin: 110px auto 0;
}

.RD .hako_slide {
    margin-bottom: 240px;
}

/*===　サムネイル表示のためのcss　*/

.gallery {
    /*ベースになるギャラリーを横並びに*/
    display: flex;
    justify-content: center;
    width: 100%;
}

.gallery li {
    width: 33.333%;
    padding: 0 10px;
}

/*画像の横幅を100%にしてレスポンシブ化*/
img {
    max-width: 100%;
    height: auto;
    vertical-align: bottom;
    /*画像の下にできる余白を削除*/
}

/* Lightbox */
.gallery__list {
    list-style-type: none;
    display: flex;
    justify-content: center;
}

ul.gallery__list {
    display: flex;
    align-items: baseline;
}

.gallery__item {
    width: calc(95% / 2);
}

.gallery__item:not(:nth-child(-n+2)) {
    margin-top: 20px;
}

.gallery__item img {
    width: 100%;
    height: auto;
}

.gallery__item a {
    transition: .5s;
}

.gallery__item a:hover {
    filter: opacity(0.7);
}

.gallery__item a:hover img {
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.15);
}

.gallery:nth-child(3) {
    margin-bottom: 100px;
}

.osaka .osaka_title a,
.tokyo .tokyo_title a,
.RD .RD_title a {
    text-decoration: none;
}

/* ここまでLightbox */

@media screen and (max-width:1080px) {
    .about_title {
        font-size: 3rem;
    }

    .osaka,
    .tokyo,
    .RD {
        margin-top: 20px;
    }

    .osaka_title p,
    .tokyo_title p,
    .RD_title p {
        font-size: 1rem;
    }

    .osaka_title p:last-child,
    .tokyo_title p:last-child,
    .RD_title p:last-child {
        font-size: 1rem;
    }
}

@media screen and (max-width:821px) {

    .osaka,
    .tokyo,
    .RD {
        margin-top: -10px;
    }

    .osaka_title p,
    .tokyo_title p,
    .RD_title p {
        font-size: 0.9rem;
    }

    .osaka_title p:last-child,
    .tokyo_title p:last-child,
    .RD_title p:last-child {
        font-size: 1rem;
    }

}

@media screen and (max-width:769px) {
    .about_title {
        font-size: 2rem;
        margin-top: 40px;
    }

    .osaka_title h1,
    .tokyo_title h1,
    .RD_title h1 {
        font-size: 1.875rem;
        text-align: initial;
    }

    .osaka_title p,
    .tokyo_title p,
    .RD_title p {
        font-size: 0.8rem;
        line-height: 25px;
        margin-top: 20px;
        text-align: initial;
    }

    .osaka_title p:last-child,
    .tokyo_title p:last-child,
    .RD_title p:last-child {
        font-size: 0.8rem;
        line-height: 25px;
    }

    .osaka {
        margin-top: -125px;
    }
}

@media screen and (max-width:550px) {

    /* 大阪 */
    .osaka {
        margin-top: -170px;
    }

    .osaka .hako_slide {
        margin-top: 40px;
    }


    .tokyo .hako_slide {
        margin-top: 40px;
    }

    .RD .hako_slide {
        margin-top: 40px;
    }

    .gallery:nth-child(3) {
        margin-bottom: 60px;
    }
}

@media screen and (max-width:401px) {
    .about_title {
        font-size: 2rem;
        margin-top: 40px;
    }

    .osaka_title h1,
    .tokyo_title h1,
    .RD_title h1 {
        font-size: 1.25rem;
        text-align: initial;
    }

    .osaka_title p,
    .tokyo_title p,
    .RD_title p {
        font-size: 0.5rem;
        line-height: 15px;
        text-align: start;
    }

    .osaka_title p:last-child,
    .tokyo_title p:last-child,
    .RD_title p:last-child {
        font-size: 0.5rem;
        line-height: 15px;
    }

    .osaka_img,
    .tokyo_img,
    .RD_img {
        margin-top: 15px;
    }

    /* LightBox */
    .gallery:nth-child(3) {
        margin-bottom: 100px;
    }

    .gallery li {
        padding: 0 3px;
    }
}