.u-hidden-pc {
    display: none;
}
@media screen and (max-width: 768px) {
    .u-hidden-pc {
        display: inherit;
    }
}

.u-hidden-sp {
    display: inherit;
}
@media screen and (max-width: 768px) {
    .u-hidden-sp {
        display: none;
    }
}

.u-inline-block {
    display: inline-block;
}

/* piano */
.piano__title {
    font-family: "Noto Serif JP", serif;
    font-optical-sizing: auto;
    font-weight: 600;
    font-size: 48px;
    text-align: center;
    line-height: 3;
    position: relative;
}

@media screen and (max-width: 768px) {
    .piano__title {
        font-size: 24px;
        line-height: 2;
    }
}

.piano__title::before {
    position: absolute;
    content: "";
    width: 4em;
    height: 2px;
    background-color: #C0C971;
    top: 0;
    left: 50%;
    -webkit-transform: translateX(-50%);
    transform: translateX(-50%);
}

.piano__title::after {
    position: absolute;
    content: "";
    width: 4em;
    height: 2px;
    background-color: #C0C971;
    bottom: 0;
    left: 50%;
    -webkit-transform: translateX(-50%);
    transform: translateX(-50%);
}

.piano__title.-price {
    background-image: url(../img/piano-title-price-bg.svg);
    background-size: auto 100%;
    background-repeat: no-repeat;
    background-position: center;
}

/* mv */
.mv.-piano {
    background: inherit;
    width: 100vw;
    max-width: 1440px;
    min-height: inherit;
    margin: 0 auto;
    overflow: hidden;
}

@media screen and (max-width: 768px) {
    .mv.-piano {
       padding-bottom: 40px;
    }
}

/* header */
.header__inner.-piano {
    background-color: rgba(255, 255, 255, 0.5);
}
.header__title.-piano {
    color: #000;
    text-align: center;
}

.header__contact.-piano {
    background-color: #999;
}

/* top */
.top {
    position: relative;
    color: #000;
    padding-bottom: 40px;
}

.top__toon {
    position: absolute;
    min-width: 436px;
    width: 24%;
    z-index: -1;
    top: -112px;
    left: 20%;
}

@media screen and (max-width: 768px) {
    .top__toon {
        min-width: inherit;
        width: 20%;
        top: 0;
        left: 0;
        width: 48%;
    }
}

.top__photo1 {
    position: absolute;
    width: 40%;
    z-index: -1;
    top: 0;
    right: 0;
    transform: translateX(100px) translateZ(0);;
    opacity: 0;
    transition: all 1.0s ease-in-out;
}

@media screen and (max-width: 768px) {
    .top__photo1 {
        width: 60%;
        transform: translateX(50px);
        max-width: 440px;
    }
}

.top__photo2 {
    position: absolute;
    width: 70%;
    z-index: 1;
    top: 21%;
    left: 0;
    transform: translateX(-250px) translateZ(0);;
    opacity: 0;
    transition: all 2.0s ease-in-out;
}

@media screen and (max-width: 768px) {
    .top__photo2 {
        top: 32%;
        width: 100%;
        max-width: 600px;
    }
}

.top__photo3 {
    position: absolute;
    width: 40%;
    z-index: -1;
    bottom: 0;
    right: 0;
    transform: translateX(150px) translateZ(0);;
    opacity: 0;
    transition: all 3.0s ease-in-out;
}

@media screen and (max-width: 768px) {
    .top__photo3 {
        width: 100%;
        max-width: 440px;
        transform: translateX(50px);
    }
}

/* 既存のアニメーション要素にwill-changeとbackface-visibilityを追加 */
.top__photo1,
.top__photo2,
.top__photo3 {
    will-change: transform, opacity;
    backface-visibility: hidden;
    transform: translateZ(0); /* ハードウェアアクセラレーションを強制 */
}

.top__photo1.is-appear,
.top__photo2.is-appear,
.top__photo3.is-appear {
    transform: translateX(0) translateZ(0);;
    opacity: 1;
}

.top__titlebox {
    position: relative;
    z-index: 4;
    background-color: rgba(217, 217, 217, 0.6);
    margin-top: 180px;
    padding: 40px;
}

@media screen and (max-width: 768px) {
    .top__titlebox {
        margin-top: 40%;
        padding: 20px;
    }
}

.top__title-text {
    display: flex;
    gap: 10%;;
    max-width: 1200px;
    margin: 0 auto;
}

@media screen and (max-width: 768px) {
    .top__title-text {
        flex-direction: column;
        gap: 20px;
    }
}

.top__company {
    font-family: "Noto Serif JP", serif;
    font-size: 72px;
    color: #fff;
}

@media screen and (max-width: 1000px) {
    .top__company {
        font-size: 32px;
    }
}

@media screen and (max-width: 768px) {
    .top__company {
        font-size: 24px;
    }
}

.top__title {
    font-family: "Noto Serif JP", serif;
    font-size: 72px;
    font-weight: bold;
}

@media screen and (max-width: 1000px) {
    .top__title {
        font-size: 32px;
    }
}

@media screen and (max-width: 768px) {
    .top__title {
        font-size: 24px;
    }
}

.top__catch {
    position: relative;
    z-index: 5;
    margin-top: 172px;
    padding: 60px 0;
    text-align: center;
    font-family: "Noto Serif JP", serif;
    font-size: 40px;
    font-weight: bold;
    background: radial-gradient(ellipse 120% 50%, #fff 30%, rgba(255, 255, 255, 0) 70%);
    transform: translateY(100px) translateZ(0);
    opacity: 0;
    transition: all 4.0s ease-in-out;
    will-change: transform, opacity;
    backface-visibility: hidden;
}

@media screen and (max-width: 768px) {
    .top__catch {
        margin-top: 80px;
        padding: 20px 0;
        background: radial-gradient(ellipse 88% 50%, #fff 60%, rgba(255, 255, 255, 0) 90%);
        font-size: 16px;
    }
}

.top__catch.is-appear {
    transform: translateY(0) translateZ(0);
    opacity: 1;
}

.top__text {
    position: relative;
    z-index: 5;
    margin-top: 10%;
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.8);
    text-align: center;
    font-family: "Noto Serif JP", serif;
    font-size: 28px;
    font-weight: bold;
}

@media screen and (max-width: 768px) {
    .top__text {
        background-color: rgba(255, 255, 255, 0.7);
        margin-top: 12px;
        font-size: 14px;
    }
}
/* about */
.about.-piano {
    background-color: inherit;
    color: #000;
    padding-block: 0;
}
.about.-piano::before {
    background: url(../img/about-piano_bg2.webp) no-repeat top left / contain;
    width: 100%;
}

.about__lead.-piano {
    margin-top: 60px;
    font-family: "Noto Serif JP", serif;
    font-size: 24px;
    color: #999;
}

@media screen and (max-width: 768px) {
    .about__lead.-piano {
        font-size: 14px;
        margin-top: 40px;
    }
}

.aboutFeatures__list.-piano {
    margin-top: 120px;
}

@media screen and (max-width: 768px) {
    .aboutFeatures__list.-piano {
        margin-top: 40px;
        gap: 20px;
    }
}

.aboutFeatures__item.-piano {
    align-items: flex-start;
}

@media screen and (max-width: 1000px) {
    .aboutFeatures__item.-piano {
        flex-direction: row;
        padding: 20px;
        border: 1px solid #C0C971;
    }
}

@media screen and (max-width: 1000px) {
    .aboutFeatures__item.-piano.-even {
        flex-direction: row-reverse;
    }
}

@media screen and (max-width: 768px) {
    .aboutFeatures__item.-piano.-even {
        flex-direction: column;
    }
}

@media screen and (max-width: 768px) {
    .aboutFeatures__item.-piano {
        flex-direction: column;
        gap: 12px;
    }
}

.aboutFeatures__item.-piano img {
    width: 72%;
}

.aboutFeatures__item-img.-piano {
    width: 48%;
    background-image: url(../img/piano-photo-bg2.svg);
    background-repeat: no-repeat;
    background-position: top left;
    background-size: auto 100%;
}

@media screen and (max-width: 768px) {
    .aboutFeatures__item-img.-piano {
        width: 100%;
    }
    
}

.aboutFeatures__item-img.-piano.-odd {
    text-align: right;
    background-position:  top left;
}

.aboutFeatures__item-img.-piano.-even {
    text-align: left;
    background-position:  top right;
}

.aboutFeatures__item-title.-piano span {
    background-color: #FBFCEE;
    color: #000;
    font-size: 28px;
}

@media screen and (max-width: 768px) {
    .aboutFeatures__item-title.-piano span {
        font-size: 14px;
    }
}

.aboutFeatures__item-label.-piano {
    position: relative;
    color: #C0C971
}

@media screen and (max-width: 768px) {
    .aboutFeatures__item-label.-piano::before,
    .aboutFeatures__item-label.-piano::after {
        content: none !important;
    }
}

.aboutFeatures__item-label.-piano.-odd::before {
    content: "";
    position: absolute;
    display: inline-block;
    width: 100px;
    height: 2px;
    background-color: #C0C971;
    left: -112px;
    top: 20px;
}

.aboutFeatures__item-label.-piano.-even::after {
    content: "";
    position: absolute;
    display: inline-block;
    width: 200px;
    height: 2px;
    background-color: #C0C971;
    right: -220px;
    top: 20px;
}

.aboutFeatures__item-desc.-piano {
    color: #000;
    font-size: 16px;
}

@media screen and (max-width: 768px) {
    .aboutFeatures__item-desc.-piano {
        font-size: 12px;
    }
    
}

.about__bottom.-piano {
    padding-top: 120px;
    padding-bottom: 100px;
    background-image: url(../img/piano-camera-bg.webp);
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    text-align: center;
    font-family: "Noto Serif JP", serif;
    font-size: 24px;
    font-weight: bold;
}

@media screen and (max-width: 768px) {
    .about__bottom.-piano {
        padding-top: 40px;
        padding-bottom: 40px;
        font-size: 16px;
    }
    
}



/* footer */
.footer.-piano {
    background-color: #444444;
}

.footer__copyright.-piano {
    background-color: #C0C971;
}

/* flow */
.flow.-piano {
    padding: 0 0 120px;
    background: url(../img/piano-flow-bg.webp) no-repeat bottom right;
    background-size: 40% auto;
    background-color: #fafafa;
}

@media screen and (max-width: 768px) {
    .flow.-piano {
        background-size: 80% auto;
        padding-bottom: 60px;
    }
    
}

.flow__box.-piano {
    padding: 80px;
    background-color: rgba(255, 255, 255, 0.5);
}

@media screen and (max-width: 768px) {
    .flow__box.-piano {
        padding: 40px 20px 40px 24px;
    }
}

@media screen and (max-width: 768px) {
    .flow__list.-piano {
        padding-left: 24px;
    }
}

.flow__list.-piano::after {
    background-color: #EEE;
}

@media screen and (max-width: 768px) {
    .flow__list.-piano::after {
        left: -1px;
    }
    
}

.flow__item.-piano {
    background-color: #fff;
    border: 1px solid #000;
    color: #000;
    font-family: "Noto Serif JP", serif;
}

.flow__item.-piano::after {
    background-color: #999;
}

.flow__item.-piano:first-of-type::after {
    background-color: #C0C971;
}

.flow__item.-piano:last-of-type::after {
    background-color: #C0C971;
}

.flow__item:last-of-type.-piano {
    border: none;
    background-image: inherit;
    background-color: #C0C971;
    color: #fff;
}

.flow__item-label.-piano {
    background-image: inherit;
    background-color: #999;
    height: 2.8em;
}

@media screen and (max-width: 768px) {
    .flow__item-label.-piano {
        max-width: 100px;
        width: 30%;
    }
}

@media screen and (max-width: 768px) {
    .flow__item-text.-piano {
        font-size: 14px;
    }
}

/* price */
.price-piano {
    position: relative;
    background: url(../img/price-piano_bg1.webp);
    background-color: #fafafa;
    background-repeat: no-repeat;
    background-position: bottom left;
    background-size: 50% auto;
    padding-bottom: 80px;
    color: #000;
}

@media screen and (max-width: 768px) {
    .price-piano {
        background-size: 80% auto;
        background-position: center left;
        padding-bottom: 40px;
    }
}

.price-piano__inner {
    font-family: "Noto Serif JP", serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
    position: relative;
    z-index: 2;
    background-color: rgba(255, 255, 255, 0.8);
    margin-top: 80px;
    padding: 80px;
}

@media screen and (max-width: 768px) {
    .price-piano__inner {
        margin-top: 40px;
        padding: 20px 20px;
    }
}

.price-piano__box {
    background-color: #fff;
    width: 100%;
    padding: 20px 0;
    border: 2px solid #EEE;
    text-align: center;
    position: relative;
    transform: translateY(50px) translateZ(0);
    opacity: 0;
    transition: all 0.5s ease-in-out;
    will-change: transform, opacity;
    backface-visibility: hidden;
}

.price-piano__box.is-appear {
    transform: translateY(0) translateZ(0);;
    opacity: 1;
}

.price-piano__box-title {
    background-color: #C0C971;
    padding: 20px;
    color: #fff;
    font-weight: bold;
    margin-bottom: 20px;
}

@media screen and (max-width: 768px) {
    .price-piano__box-title {
        padding: 12px;
    }
    
}

.price-piano__box-title.-silver {
    background-color: #999;
}

.price-piano__box-text {
    font-weight: bold;
    font-size: 28px;
}

@media screen and (max-width: 768px) {
    .price-piano__box-text {
        font-size: 14px;
        line-height: 2;
    }
}

.price-piano__box-text.-mt {
    margin-top: 20px;
}

.price-piano__box-text.-left {
    text-align: left;
}

.price-piano__box-small {
    font-family: "Noto Serif JP", serif;
}

.price-piano__box-price {
    font-size: 48px;
}

@media screen and (max-width: 768px) {
    .price-piano__box-price {
        font-size: 24px;
    }
}

.price-piano__box-plus {
    max-width: 60px;
}

.price-piano__box-flex {
    display: flex;
    gap: 12px;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
    margin-top: 20px;
}

.price-piano__bg2 {
    position: absolute;
    bottom: 0;
    right: 0;
    z-index: 0;
    width: 40%;
    opacity: 0.8;
}

@media screen and (max-width: 768px) {
    .price-piano__bg2 {
        width: 50%;
    }
}

/* contact */
.contact.-piano {
    background-image: url(../img/piano-contact_bg.webp);
    background-repeat: no-repeat;
    background-position: top right;
    background-size: 50% auto;
    background-color: #FBFCEE;
}

.contact__text.-piano {
    font-family: "Noto Serif JP", serif;
    font-size: 24px;
    color: #000;
    text-align: center;
    margin-top: 40px;
    margin-bottom: 40px;
}

@media screen and (max-width: 768px) {
    .contact__text.-piano {
        font-size: 14px;
        margin: 20px 0;
    }
}

.contact__form.-piano {
    padding: 80px;
}

@media screen and (max-width: 768px) {
    .contact__form.-piano {
        padding: 40px 20px;
    }
}

.contact__form.-piano .formSubmitBtn {
    background-color: #C0C971;
    min-width: 280px;
}

.contact__form.-piano input::placeholder {
    color: #CCC !important;
}

.contact__form.-piano textarea::placeholder {
    color: #CCC !important;
}

@media screen and (max-width: 768px) {
    .contact__form.-piano .formSubmitBtn {
        min-width: inherit;
    }
}

.contact__form.-piano .formItem__doui {
    font-weight: bold;
    text-align: center;
    margin: 0 auto;
}

@media screen and (max-width: 768px) {
    .contact__form.-piano .formItem__doui {
        text-align: left;
    }
}

@media screen and (max-width: 768px) {
    .contact__form.-piano .formItem__doui span {
        margin-left: 0;
    }
}

.contact__form.-piano .formItem__link {
    color: #C0C971;
    text-decoration: underline;
}

/* アニメーション完了後にwill-changeをリセット */
.top__photo1.animation-complete,
.top__photo2.animation-complete,
.top__photo3.animation-complete,
.top__catch.animation-complete,
.price-piano__box.animation-complete {
    will-change: auto;
}