.page {
}

.btn-top {
    opacity: 0;
    width: 100px;
    position: fixed;
    top: -200px;
    left: 20px;
    z-index: 1000;
    transition: all 0.8s ease;
}
.btn-top a {
    display: block;
    background: rgba(255,255,255,0.8);
    border-bottom-left-radius: 5px;
    border-bottom-right-radius: 5px;
    overflow: hidden;
}
.btn-top.is_active {
    top: 0px;
    opacity: 1;
}

#introduction,
#story {
    background: #FFF;
}
.introduction-inner {
    display: flex;
    padding-top: 100px;
    padding-bottom: 100px;
    max-width: 1480px;
    margin: 0 auto;
}
#introduction .area-title {
    width: 250px;
    margin-bottom: 30px;
    margin-left: -60px;
}
.introduction-body {
    width: 82%;
}
.introduction-catch {
    width: 18%;
    max-width: 240px;
    margin-top: -100px;
}
.introduction-text {
    padding-left: 20%;
    padding-top: 60px;
}
#introduction p {
    font-family: sans-serif;
    font-size: 14px;
    letter-spacing: 0.035em;
    line-height: 1.7em;
    color: #5b7d8d;
}
@media screen and (min-width: 1480px) {
    .introduction-inner {
        display: flex;
        padding-top: 160px;
    }
}
@media screen and (max-width: 920px) {
    .introduction-inner {
        display: flex;
        flex-direction: column-reverse;
        padding-top: 30px;
        padding-bottom: 60px;
        max-width: 1480px;
        margin: 0 auto;
    }
    .introduction-body {
        width: 100%;
    }
    .introduction-img {
        width: 92%;
        margin-right: auto;
    }
    #introduction .area-title {
        width: 250px;
        margin-bottom: 30px;
        margin-left: 0;
        margin-top: 40px;
    }
    .introduction-catch {
        width: 30%;
        max-width: 240px;
        margin: 0 auto;
    }
    .introduction-text {
        padding: 0 30px;
    }
    .introduction-text p {
        padding: 0 3%;
    }
}

#story {
    position: relative;
}
#story::after {
    content: '';
    display: block;
    position: absolute;
    bottom: -200px;
    left: 0;
    height: 200px;
    width: 100%;
    background: linear-gradient(rgba(255,255,255, 0.8), rgba(255,255,255, 0.8) 20%, transparent 100%);
}
.story-inner {
    padding-bottom: 60px;
    max-width: 1480px;
    margin: 0 auto;
}
#story .area-title {
    width: 136px;
}
#story .story-img {
    width: 82%;
    margin-left: auto;
}
.story-body {
    display: flex;
    flex-direction: row-reverse;
    max-width: 1200px;
    padding: 0 100px;
    margin-top: 60px;
}
.story-body .area-title {
    width: 140px;
}
.story-body p {
    width: calc(100% - 200px);
    margin-right: auto;
    font-family: sans-serif;
    font-size: 14px;
    letter-spacing: 0.035em;
    line-height: 1.7em;
    color: #5b7d8d;
}
@media screen and (min-width: 1480px) {
    .story-inner {
        padding-bottom: 160px;
    }
}
@media screen and (max-width: 920px) {
    #story .story-img {
        width: 92%;
        margin-left: auto;
    }
    #story::after {
        bottom: -30px;
        height: 30px;
    }
    .story-body {
        display: block;
        padding: 0 30px;
        margin-top: 40px;
    }
    .story-body .area-title {
        width: 140px;
    }
    .story-body p {
        width: 100%;
        margin: 1.5em auto 0;
        padding: 0 3%;
    }
}

#profile {
    background: url(../images/about/profile_bg.jpg) no-repeat center top;
    background-attachment: fixed;
    background-size: cover;
}
.profile-inner {
    padding-top: 600px;
    background: linear-gradient(transparent, rgba(0,0,0,0.7) 800px, rgba(0,0,0,0.7) 100%);
}
#profile .area-title {
    color: #FFF;
    width: 170px;
    margin: 0 auto 18px;
}
.casts,
.staffs {
    width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}
.staffs {
    border-top: solid 1px #555365;
    padding: 100px 0 160px;
    margin-top: 100px;
}
.casts .cast {
    width: calc(100% / 3 - 20px);
    padding: 0 10px;
    margin: 50px 0;
}
.casts .cast:nth-child(1),
.casts .cast:nth-child(2) {
    width: calc(100% / 2 - 20px);
}
.cast-img {
    max-width: 180px;
    margin: 0 auto;
}
.casts .cast:nth-child(1) .cast-img,
.casts .cast:nth-child(2) .cast-img {
    max-width: 305px;
}
.cast-name,
.staff-name,
.cast-body,
.staff-body {
    color: #FFF;
}
.cast-name {
    font-family: serif;
    font-size: 23px;
    font-weight: 400;
    letter-spacing: 0.075em;
    text-align: center;
    margin: 0.6em 0 1em;
}
.cast-name .chara {
    display: block;
    font-size: 14px;
}
.cast:nth-child(1) .chara,
.cast:nth-child(2) .chara {
    display: inline-block;
}
.cast-body {
    font-family: sans-serif;
    font-size: 14px;
    letter-spacing: 0.035em;
    line-height: 1.7em;
    color: #a7c2ce;
}

.staffs {
    display: flex;
}
.staff {
    width: calc(100% / 3 - 40px);
    padding: 0 20px;
}
.staff-name {
    font-family: serif;
    font-size: 23px;
    font-weight: 400;
    letter-spacing: 0.075em;
    text-align: center;
    margin: 0.6em 0 1em;
}
.staff-name .chara {
    display: block;
    font-size: 14px;
}
.staff-body {
    font-size: 14px;
    letter-spacing: 0.035em;
    line-height: 1.7em;
    color: #a7c2ce;
}
@media screen and (max-width: 920px) {
    #profile {
        padding-top: calc(100vw / 2732 * 1592);
        background: #111019 url(../images/about/profile_img1.jpg) no-repeat center top;
        background-size: 100% auto;
        background-attachment: scroll;
    }
    #profile .area-title {
        margin: 0 auto;
    }
    .profile-inner {
        padding-top: 0px;
        background: linear-gradient(transparent, rgba(0,0,0,0.7) 800px, rgba(0,0,0,0.7) 100%);
    }
    .casts,
    .staffs {
        width: 100%;
        justify-content: center;
    }
    .staffs {
        padding: 50px 0 80px;
        margin-top: 50px;
    }
    .casts .cast {
        width: 80%;
        padding: 0 10px;
        margin: 50px 0;
    }
    .casts .cast:nth-child(1),
    .casts .cast:nth-child(2) {
        width: 80%;
    }
    .cast-img {
        width: 50%;
        margin: 0 auto;
    }
    .casts .cast:nth-child(1) .cast-img,
    .casts .cast:nth-child(2) .cast-img {
        width: 75%;
    }
    .staffs {
        display: flex;
        flex-wrap: wrap;
    }
    .staff {
        width: 80%;
        margin-bottom: 50px;
        padding: 0 20px;
    }
}