:root {
    /* プライマリーカラーの設定 */
    --color-ongaku-900: #0B254B;
    --color-ongaku-800: #103875;
    --color-ongaku-700: #144D9E;
    --color-ongaku-600: #185FC9;
    --color-ongaku-500: #1D70EA;
    --color-ongaku-400: #5A9AF5;
    --color-ongaku-300: #93BFFF;
    --color-ongaku-200: #BFD9FF;
    --color-ongaku-100: #DBEAFF;
    --color-ongaku-50: #EFF6FF;

    /* サブカラーの設定 */
    --color-ongaku-sub-900: #623109;
    --color-ongaku-sub-500: #FC961A;
    --color-ongaku-sub-50: #FFF8ED;

    /* フォントファミリー */
    --font-family-en: "Montserrat", sans-serif;

    /* テキストリンク色の設定 */
    --color-text-link: var(--color-ongaku-500);

    /* プライマリーボタン色の設定 */
    --color-btn-ongaku-primary: var(--color-ongaku-900);
    --color-btn-ongaku-primary-text: var(--color-white);
    --color-btn-ongaku-primary-frame: var(--color-white);

    /* サブボタン色の設定 */
    --color-btn-ongaku-sub: var(--color-white);
    --color-btn-ongaku-sub-text: var(--color-ongaku-900);
    --color-btn-ongaku-sub-frame: var(--color-ongaku-900);

    /* シャドウ */
    --frame-shadow: 0px 0px 10px rgba(0, 0, 0, .16);
    --text-shadow: 0 0 20px rgb(0, 0, 0, .25);
}

/* フォント */
[lang="en"] {
    font-family: var(--font-family-en);
}


/* ボタン */
.c-btn.l-btn-primary {
    background-color: var(--color-btn-ongaku-primary);
    color: var(--color-btn-ongaku-primary-text);
    border-color: var(--color-btn-ongaku-primary-frame);
}

.c-btn.l-btn-primary .c-action {
    border-color: var(--color-btn-ongaku-primary-frame);
    background-color: var(--color-btn-ongaku-primary);
}

.c-btn.l-btn-primary .c-action::before,
.c-btn.l-btn-primary .c-action::after {
    background-color: var(--color-btn-ongaku-primary-frame);
}

.c-btn.l-btn-sub {
    background-color: var(--color-btn-ongaku-sub);
    color: var(--color-btn-ongaku-sub-text);
    border-color: var(--color-btn-ongaku-sub-frame);
}

.c-btn.l-btn-sub .c-action {
    border-color: var(--color-btn-ongaku-sub-frame);
    background-color: var(--color-btn-ongaku-sub);
}

.c-btn.l-btn-sub .c-action::before,
.c-btn.l-btn-sub .c-action::after {
    background-color: var(--color-btn-ongaku-sub-frame);
}

@media (any-hover: hover) {
    .c-btn.l-btn-primary:hover {
        background-color: var(--color-ongaku-800);
    }

    .c-btn.l-btn-primary:hover .c-action {
        background-color: var(--color-ongaku-800);
    }

    .c-btn.l-btn-sub:hover {
        background-color: var(--color-ongaku-100);
    }

    .c-btn.l-btn-sub:hover .c-action {
        background-color: var(--color-ongaku-100);
    }
}

/* フォントカラー */
.l-fc-primary-500 {
    color: var(--color-ongaku-500) !important;
}

.l-fc-primary-900 {
    color: var(--color-ongaku-900) !important;
}

.l-fc-sub-500 {
    color: var(--color-ongaku-sub-500) !important;
}

.l-text-shadow {
    text-shadow: var(--text-shadow);
}


/* 背景 */
.l-bg-primary-50 {
    background-color: var(--color-ongaku-50) !important;
}

.l-bg-primary-500 {
    background-color: var(--color-ongaku-500) !important;
}

.l-bg-primary-900 {
    background-color: var(--color-ongaku-900) !important;
}

/* 見出し */
.c-head {
    color: var(--color-ongaku-900);
    font-weight: var(--font-weight-heavy);
    letter-spacing: var(--letter-spacing-m);
    line-height: 1.6;
}

.c-head .c-head-sub {
    color: var(--color-ongaku-500);
    letter-spacing: var(--letter-spacing-m);
    font-size: var(--font-size-xl);
    display: flex;
    align-items: center;
    gap: var(--size-01);
    margin-bottom: 1rem;
    line-height: 1;
}

.l-head-center .c-head {
    text-align: center;
    justify-content: center;
}

.l-head-center .c-head .c-head-sub {
    justify-content: center;
}

.c-head .c-head-sub::before {
    content: "";
    width: 1.2rem;
    height: 1.2rem;
    border-radius: 50%;
    background: radial-gradient(circle at center, var(--color-ongaku-200) 0%, var(--color-ongaku-500) 100%);
}

.c-head .c-head-sub.l-head-sub-white::before {
    background: radial-gradient(circle at center, rgb(255 255 255 / 50%) 0%, rgb(255 255 255 / 100%) 100%);
}

.p-head-en,
.c-head .c-head-sub.l-head-en {
    font-family: var(--font-family-figtree);
    color: var(--color-ongaku-500);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-xl);
    font-size: var(--font-size-l);
    font-weight: var(--font-weight-heavy);
    line-height: 1;
}


/* カード */
#page-ongaku .c-card.u-card-bg.u-card-text .c-card-cnt,
#page-ongaku .c-card.u-card-frame.u-card-text .c-card-cnt {
    padding: var(--size-04);
}

.c-card .c-card-dtl {
    font-size: var(--font-size-m);
    line-height: 1.6;
}

#page-ongaku .l-box-inner {
    padding: clamp(3.2rem, 5vw, 4.8rem);
}


/* フレーム */
#page-ongaku .l-frame-rounded {
    border-radius: var(--size-01);
}

#page-ongaku .l-frame-rounded img {
    border-radius: inherit;
}

#page-ongaku .l-l-frame-shadow {
    box-shadow: var(--frame-shadow);
}


/* カラム */
#page-ongaku .l-grid-cnt {
    container-type: inline-size;
}

#page-ongaku .l-top-col {
    display: grid;
    grid-template-columns: 50rem 1fr;
    column-gap: var(--size-08);
    row-gap: var(--size-column);
    align-items: center;
}

#page-ongaku .l-top-col.l-top-il {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
}

#page-ongaku .l-top-col.l-top-il.l-top-col-reverse {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
}

#page-ongaku .l-top-col.l-top-il.l-top-col-reverse .l-top-col-img {
    order: 2;
}

#page-ongaku .l-top-col.l-top-col-reverse .l-top-col-txt {
    order: 1;
}

#page-ongaku .l-top-col .l-top-col-img {
    max-width: 50rem;
    margin-inline: auto;
}

@container (max-width: 102.4rem) {
    #page-ongaku .l-top-col {
        grid-template-columns: minmax(0, 1fr);
    }
}


/* 余白 */
#page-ongaku .l-m-text {
    margin-top: var(--size-01) !important;
}


/* リスト */
#page-ongaku .u-mark-dot::before {
    color: var(--color-ongaku-500, inherit);
}

#page-ongaku .u-mark-line::before {
    color: var(--color-ongaku-500, inherit);
}

#page-ongaku .u-mark-num::before {
    color: var(--color-ongaku-500, inherit);
}

.u-mark-alpha::before {
    color: var(--color-ongaku-500, inherit);
}

.u-mark-arrow::before,
.u-mark-check::before,
.u-mark-anchor::before {
    background-color: var(--color-ongaku-500, #001195);
}


/* ラベル */
#page-ongaku .l-label {
    display: inline-block;
    padding: 0.1em 1em;
    border: 1px solid var(--color-ongaku-500);
    border-radius: 100rem;
    background-color: var(--color-white);
    width: 10rem;
    text-align: center;
}

/* mv */
.l-mv-wrap {
    position: relative;
    isolation: isolate;
    margin-bottom: clamp(14rem, 22vw, 24rem);
}

#sec-mv {
    background:
        linear-gradient(rgb(255 255 255 / 70%),
            rgb(255 255 255 / 70%)),
        linear-gradient(120deg, #ff8a00 0%, #93e393 50%, #0091ff 100%);
    position: relative;
    container-type: inline-size;
    padding-bottom: 0;
}

#sec-mv .l-mv-circle {
    position: absolute;
    display: block;
    aspect-ratio: 1;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
    will-change: transform;
}

#sec-mv .l-mv-circle-top {
    width: clamp(60rem, 68.1cqw, 120rem);
    top: -24.3cqw;
    left: -11.1cqw;

    background: linear-gradient(135deg,
            rgb(255 255 255 / 90%) 0%,
            rgb(255 255 255 / 10%) 100%);

    animation-name: mv-float-top;
    animation-duration: 19s;
    animation-delay: -3s;
}

#sec-mv .l-mv-circle-left {
    width: clamp(45rem, 55.3cqw, 100rem);
    bottom: -36cqw;
    left: -18.8cqw;

    background: linear-gradient(90deg,
            rgb(255 255 255 / 40%) 0%,
            rgb(255 255 255 / 20%) 100%);

    animation-name: mv-float-center;
    animation-duration: 17s;
    animation-delay: -5s;
}

#sec-mv .l-mv-circle-center {
    width: clamp(40rem, 50.9cqw, 90rem);
    top: 10.4cqw;
    left: 28.5cqw;

    background: linear-gradient(90deg,
            rgb(221 235 255 / 15%) 0%,
            rgb(255 255 255 / 15%) 100%);

    animation-name: mv-float-right;
    animation-duration: 27s;
    animation-delay: -13s;
}

#sec-mv .l-mv-circle-right {
    width: clamp(50rem, 60.3cqw, 110rem);
    top: 6.9cqw;
    right: -23.6cqw;

    background: linear-gradient(135deg,
            rgb(255 255 255 / 12%) 0%,
            rgb(221 235 255 / 30%) 100%);

    animation-duration: 17s;
    animation-delay: -8s;
    --move-x: -8rem;
    --move-y: 7rem;
}

@keyframes mv-float-top {

    0%,
    100% {
        transform: translate3d(0, -5rem, 0);
    }

    40% {
        transform: translate3d(2rem, 6rem, 0);
    }

    75% {
        transform: translate3d(-2rem, 2rem, 0);
    }
}

@keyframes mv-float-left {

    0%,
    100% {
        transform: translate3d(-7rem, 0, 0);
    }

    45% {
        transform: translate3d(8rem, -2rem, 0);
    }

    75% {
        transform: translate3d(3rem, 3rem, 0);
    }
}

@keyframes mv-float-center {

    0%,
    100% {
        transform: translate3d(0, -6rem, 0);
    }

    25% {
        transform: translate3d(7rem, 0, 0);
    }

    50% {
        transform: translate3d(0, 6rem, 0);
    }

    75% {
        transform: translate3d(-7rem, 0, 0);
    }
}

@keyframes mv-float-right {

    0%,
    100% {
        transform: translate3d(5rem, -4rem, 0);
    }

    35% {
        transform: translate3d(-5rem, 5rem, 0);
    }

    70% {
        transform: translate3d(-2rem, -3rem, 0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .l-mv-circle {
        animation: none;
        will-change: auto;
    }
}

#sec-mv .l-mv-sub-ttl {
    font-size: clamp(1.8rem, 3vw, 2.2rem) !important;
    line-height: 1.5;
    width: 100%;
}

#sec-mv h1 {
    max-width: 50rem;
    width: 90%;
}

#sec-mv .l-mv-label {
    background-color: rgb(255, 255, 255, 50%);
    padding-block: var(--size-01);
    margin-block: var(--size-05);
    width: 100%;
    max-width: 50rem;
    border-top: 2px solid var(--color-ongaku-900);
    border-bottom: 2px solid var(--color-ongaku-900);
}

.l-btn-wrap {
    width: 100%;
}

.l-btn-wrap .c-col>.c-col-box:nth-child(1) {
    align-items: flex-end;
}

.l-btn-wrap .c-col>.c-col-box:nth-child(2) {
    align-items: flex-start;
}

#sec-mv>.p-scroll {
    z-index: 1;
}

#sec-mv .l-marquee {
    display: flex;
    overflow: hidden;
    width: 100%;
}

#sec-mv .l-marquee-inner {
    display: flex;
    flex-shrink: 0;
    min-width: 100%;
    animation: marqueeAnime 100s linear infinite;
}

#sec-mv .l-marquee-text {
    font-size: clamp(16rem, 25vw, 20rem);
    line-height: 1.2;
    font-weight: var(--font-weight-black);
    color: var(--color-white);
    white-space: nowrap;
    padding-right: var(--size-06);
    opacity: .7;
}


@keyframes marqueeAnime {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-100%);
    }
}

.l-mv-img {
    position: absolute;
    width: min(90%, 100rem);
    left: 50%;
    bottom: 0;
    transform: translate(-50%, 50%);
    z-index: 2;
    padding: 0;
}

.l-mv-img img {
    max-width: 90%;
    margin: 0 auto;
}

/* problem */
#sec-problem {
    position: relative;
    z-index: 1;
}

#sec-problem::after {
    content: "";
    position: absolute;
    top: 99%;
    left: 50%;
    transform: translateX(-50%);
    width: 10rem;
    height: 4rem;
    background-color: var(--color-white);
    clip-path: polygon(0 0, 100% 0, 50% 100%);
}

#sec-problem .l-problem-inner {
    display: grid;
    grid-template-columns: 15rem 1fr;
    gap: var(--size-03);
    align-items: center;
}

#sec-problem .l-problem-img {
    max-width: 15rem;
    margin: 0 auto;
}

/* solution */
#sec-solution .l-sol-box {
    background-color: rgb(255 255 255 / 70%);
}

#sec-solution .l-sol-head {
    display: grid;
    grid-template-columns: 20rem 1fr;
    gap: var(--size-04);
    align-items: center;
}

#sec-solution .l-sol-head .l-sol-logo {
    max-width: 20rem;
    margin: 0 auto;
}

@container (max-width: 60rem) {
    #sec-solution .l-sol-head {
        grid-template-columns: 1fr;
        justify-items: center;
    }
}

#sec-solution .c-card-cnt.l-sol-item {
    position: relative;
    padding-top: var(--size-08) !important;
}

#sec-solution .l-sol-ttl {
    position: absolute;
    transform: translateX(-50%);
    top: 0;
    left: 50%;
    width: 8em;
    border-radius: 0 0 100rem 100rem;
}

#sec-solution .l-sol-ttl h3 {
    line-height: 2;
}

#sec-solution .l-sol-dtl {
    display: grid;
    grid-template-columns: 10rem minmax(0, max-content);
    gap: var(--size-column);
    width: fit-content;
    max-width: 100%;
    margin-inline: auto;
    align-items: center;
}

#sec-solution .l-sol-dtl .l-sol-img {
    max-width: 10rem;
    margin: 0 auto;
}

#sec-solution .l-sol-dtl .c-list {
    margin-left: -0.5em;
}

@container (max-width: 30rem) {
    #sec-solution .l-sol-dtl {
        grid-template-columns: 1fr;
        justify-items: center;
    }
}

#sec-solution .l-sol-op-box {
    background-color: rgb(245 245 245 / 70%);
}

#sec-solution .l-sol-op-box .l-sol-dtl {
    grid-template-columns: 9rem 1fr;
}

#sec-solution .l-sol-op-box .l-sol-dtl .l-sol-img {
    max-width: 9rem;
}

@container (max-width: 30rem) {
    #sec-solution .l-sol-op-box .l-sol-dtl {
        grid-template-columns: 1fr;
    }
}

#sec-solution .l-sol-divider {
    position: relative;
    display: flex;
    justify-content: center;
    margin-block: var(--size-03);
}

#sec-solution .l-sol-divider::before {
    content: "";
    position: absolute;
    transform: translateY(-50%) translateX(-50%);
    top: 50%;
    left: 50%;
    width: 1px;
    height: calc(var(--size-06) + 1lh);
    background-color: var(--color-ongaku-500);
    z-index: 0;
}

#sec-solution .l-sol-divider span {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    gap: var(--size-01);
    padding: 0 var(--size-03);
    border: 1px solid var(--color-ongaku-500);
    border-radius: 100rem;
    line-height: 2;
}

#sec-solution .l-sol-divider span::before {
    content: "+";
    display: grid;
    place-items: center;
    width: 1.8rem;
    height: 1.8rem;
    border: 1px solid currentColor;
    border-radius: 50%;
    font-size: var(--font-size-s);
    font-weight: var(--font-weight-regular);
    line-height: 1;
}


/* about */
#sec-about .l-about-item {
    display: flex;
    align-items: center;
    gap: var(--size-column);
}

#sec-about .l-about-item:not(:last-child) {
    padding-bottom: var(--size-025);
    border-bottom: 1px solid var(--color-gray-200);
}

#sec-about .l-about-item:not(:first-child) {
    padding-top: var(--size-025);
}

#sec-about .l-about-num {
    font-family: var(--font-family-en);
}


/* concept */
#sec-concept {
    position: relative;
    overflow: hidden;
}

#sec-concept .l-concept-box {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--size-06);
}

#sec-concept .l-concept-box::before {
    content: "";
    display: block;
    width: 32rem;
    aspect-ratio: 1/1;
    background-image: url(/bunkyo/img/on-gaku/logo-white-circle.svg);
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
    position: absolute;
    right: var(--size-04);
    bottom: var(--size--14);
    opacity: .2;
}

#sec-concept .l-concept-box .l-concept-img {
    max-width: 32rem;
    margin: var(--size-01) auto 0;
}

/* feature */
#sec-feature .l-feat-item {
    display: grid;
    grid-template-columns: 9rem 1fr;
    gap: var(--size-column);
}

#sec-feature .l-feat-item .l-feat-img {
    max-width: 9rem;
    margin: var(--size-01) auto 0;
}

@container (max-width: 40rem) {
    #sec-feature .l-feat-item {
        grid-template-columns: 1fr;
    }
}


/* cnt-sub */
#sec-cta-sub .l-cta-sub-box {
    display: grid;
    grid-template-columns: 3fr 4fr;
    column-gap: var(--size-06);
    row-gap: var(--size-column);
    align-items: center;
}


/* function */
#sec-function .l-func-tab>.c-tab-list {
    display: flex;
    width: fit-content;
    max-width: 100%;
    margin-inline: auto;
    padding: var(--size-01);
    border: 1px solid var(--color-ongaku-900);
    border-radius: 100rem;
    gap: var(--size-04);
}

#sec-function .l-func-tab>.c-tab-list .c-tab-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex: 1;
    min-width: 10rem;
    padding: var(--size-01) var(--size-03);
    border-radius: 100rem;
    color: var(--color-ongaku-900);
    line-height: 1.4;

}

#sec-function .c-tab-btn span[lang="en"] {
    font-family: var(--font-family-en);
}

#sec-function .l-func-tab>.c-tab-list .c-tab-btn[aria-selected="true"] {
    background-color: var(--color-ongaku-500);
    color: var(--color-white);
}

#sec-function .c-slider-control {
    margin-top: 0;
}

#sec-function .c-slider-control .c-action {
    border-color: var(--color-ongaku-500);
}

#sec-function .c-slider-control .c-slider-prev:hover,
#sec-function .c-slider-control .c-slider-next:hover {
    border-color: var(--color-ongaku-500);
    background-color: var(--color-ongaku-500);
}

#sec-function .c-slider-control .c-slider-dot {
    background: var(--color-ongaku-300);
}

#sec-function .c-slider-control .c-slider-dot:hover {
    background-color: var(--color-ongaku-500);
}

#sec-function .c-slider-control .c-slider-dot.is-active {
    background-color: var(--color-ongaku-500);
}

#sec-function .c-action::before,
#sec-function .c-action::after {
    background-color: var(--color-ongaku-500);
}

@media (any-hover: hover) {

    #sec-function a:hover .c-action::before,
    #sec-function button:hover .c-action::before {
        background-color: var(--color-white);
    }
}

#sec-function .l-func-box {
    display: grid;
    grid-template-columns: 4fr 3fr;
    column-gap: var(--size-06);
    row-gap: var(--size-04);
    align-items: center;
}

#sec-function .l-func-text h3 {
    line-height: 1.6;
    row-gap: var(--size-02);
}

#sec-function .l-func-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: var(--size-column);
    padding: var(--size-03);
}

#sec-function .l-func-img .swiper {
    padding: 2rem;
}

@container (max-width: 50rem) {
    #sec-function .l-func-list {
        grid-template-columns: 1fr;
    }
}

#sec-function .l-func-img {
    max-width: 45rem;
    margin: 0 auto;
}

#sec-function .l-func-img .c-slider-control {
    justify-content: center;
}


/* ai */
#sec-ai.c-sec {
    padding-bottom: 20rem !important;
}

#sec-ai .l-ai-text h3 {
    line-height: 1.6;
    row-gap: var(--size-015);
}


/* option */
#sec-option {
    position: relative;
}

#sec-option.c-sec {
    padding-top: 20rem !important;
}

#sec-option .l-photo-marquee {
    display: flex;
    width: 100%;
    overflow: hidden;
    margin-bottom: var(--size-08);
    position: absolute;
    transform: translateY(-50%);
    top: 0;
    padding: 2rem 0;
}

#sec-option .l-photo-marquee-group {
    display: flex;
    flex-shrink: 0;
    gap: var(--size-03);
    padding-right: var(--size-03);
    animation: photo-marquee 40s linear infinite;
}

#sec-option .l-photo-marquee-group picture {
    display: block;
    flex-shrink: 0;
    width: clamp(24rem, 25vw, 36rem);
    aspect-ratio: 3 / 2;
    overflow: hidden;
    border-radius: var(--size-01);
}

#sec-option .l-photo-marquee-group img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@keyframes photo-marquee {
    from {
        transform: translateX(0);
    }

    to {
        transform: translateX(-100%);
    }
}

@media (prefers-reduced-motion: reduce) {
    #sec-option .l-photo-marquee-group {
        animation: none;
    }

    #sec-option .l-photo-marquee-group[aria-hidden="true"] {
        display: none;
    }

    #sec-option .l-photo-marquee {
        overflow-x: auto;
    }
}


/* journey */
#sec-journey {
    background-image: linear-gradient(0deg, var(--color-white) 0%, var(--color-ongaku-50) 100%);
}

#sec-journey .l-jour-box {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--size-04);
    align-items: stretch;
    padding-top: var(--size-08);
    padding-bottom: 9rem;
}

#sec-journey .l-jour-box>.c-card:nth-child(1) {
    transform: translateY(9rem);
}

#sec-journey .l-jour-box>.c-card:nth-child(2) {
    transform: translateY(6rem);
}

#sec-journey .l-jour-box>.c-card:nth-child(3) {
    transform: translateY(3rem);
}

#sec-journey .l-jour-box>.c-card:nth-child(4) {
    transform: translateY(0);
}

#sec-journey .l-jour-stage-01 {
    background-color: var(--color-ongaku-100);
}

#sec-journey .l-jour-stage-02 {
    background-color: var(--color-ongaku-200);
}

#sec-journey .l-jour-stage-03 {
    background-color: var(--color-ongaku-300);
}

#sec-journey .l-jour-stage-04 {
    background-color: var(--color-ongaku-500);
}

#sec-journey .c-card.u-card-text.u-card-num .c-card-cnt {
    padding-top: var(--size-04);
}

#sec-journey .c-card.u-card-num .c-card-num {
    top: clamp(-2rem, calc(1rem - 2.34375vw), -1.4rem);
    font-size: clamp(2.8rem, calc(4.6875vw - 2rem), 4rem);
    font-family: var(--font-family-en);
    paint-order: stroke;
    -webkit-text-stroke: var(--size-005) var(--color-white);
}

#sec-journey .l-jour-box .c-card-box {
    flex: 1;
}

#sec-journey .l-jour-box>.c-card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

#sec-journey .l-jour-box>.c-card:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: calc(var(--size-04) / -2);
    transform: translate(50%, -50%);
    width: 0;
    height: 0;
    border-top: 2.5rem solid transparent;
    border-bottom: 2.5rem solid transparent;
    border-left: 1.5rem solid var(--color-gray-200);
    z-index: 2;
}


/* cta */
#sec-cta-main {
    background-image: linear-gradient(135deg, #0091FF 0%, #93E393 50%, #FF8A00 100%);
}


@media screen and (max-width: 1024px) {

    /* mv */
    .l-mv-circle-top {
        width: clamp(45rem, 78cqw, 80rem);
        top: -20rem;
        left: -25rem;
    }

    .l-mv-circle-left {
        width: clamp(35rem, 54cqw, 55rem);
        bottom: -20rem;
        left: -20rem;
    }

    .l-mv-circle-center {
        width: clamp(35rem, 54cqw, 55rem);
        top: 30%;
        left: 15%;
    }

    .l-mv-circle-right {
        width: clamp(40rem, 63cqw, 65rem);
        top: 15%;
        right: -25rem;
    }

    /* problem */
    #sec-problem .l-problem-inner {
        grid-template-columns: 1fr;
        gap: var(--size-03);
        align-items: center;
    }


    /* cnt-sub */
    #sec-cta-sub h2,
    #sec-cta-sub .l-lead {
        text-align: center;
    }

    #sec-cta-sub .l-cta-sub-box {
        grid-template-columns: 1fr;
    }


    /* function */
    #sec-function .l-func-tab {
        display: flex;
        flex-direction: column;
        gap: var(--size-06);
    }

    #sec-function .l-func-tab>.c-tab-panel {
        display: block !important;
        width: 100%;
        margin: 0;
        animation: none;
        padding-block: 0;
    }

    #sec-function .l-func-box {
        grid-template-columns: 1fr;
    }

    #sec-function .l-func-box> :first-child {
        order: 2;
    }

    #sec-function .l-func-box> :nth-child(2) {
        order: 1;
    }

    #sec-function .l-func-tab>.c-tab-list {
        display: none;
    }

    #sec-function .l-func-text br.u-view-pc {
        display: none !important;
    }


    /* journey */
    #sec-journey .l-jour-box {
        grid-template-columns: 1fr;
        gap: var(--size-10);
        padding-block: 0;
    }

    #sec-journey .l-jour-box>.c-card {
        transform: translateY(0) !important;
    }

    #sec-journey .l-jour-box>.c-card:not(:last-child)::after {
        top: auto;
        right: auto;
        bottom: calc(var(--size-10) / -2);
        left: 50%;
        transform: translate(-50%, 50%);
        border-top: 1.5rem solid var(--color-gray-200);
        border-right: 2.5rem solid transparent;
        border-bottom: none;
        border-left: 2.5rem solid transparent;
    }

    #sec-journey .c-card.u-card-num .c-card-num {
        top: -2rem;
        font-size: var(--size-05);
    }
}

@media screen and (max-width: 768px) {
    #page-ongaku .l-top-col.l-top-il {
        padding-top: var(--size-05);
    }

    #page-ongaku .l-top-col.l-top-il,
    #page-ongaku .l-top-col.l-top-il.l-top-col-reverse {
        grid-template-columns: 1fr;
        position: relative;
    }

    #page-ongaku .l-top-col.l-top-il .l-top-col-img {
        position: absolute !important;
        width: 16rem;
        transform: translateY(-50%);
        top: var(--size--04);
        right: 0;
        z-index: 1;
    }

    #page-ongaku .l-top-col.l-top-il.l-top-col-reverse .l-top-col-img,
    #page-ongaku .l-top-col.l-top-il.l-top-col-reverse .l-top-col-txt {
        order: initial;
    }

    .l-btn-wrap .c-col>.c-col-box:nth-child(1) {
        align-items: center;
    }

    .l-btn-wrap .c-col>.c-col-box:nth-child(2) {
        align-items: center;
    }

    /* problem */
    #sec-problem .l-problem-inner {
        grid-template-columns: 15rem 1fr;
    }

    /* concept */
    #sec-concept .l-concept-box {
        grid-template-columns: 1fr;
    }

    #sec-concept .l-concept-box::before {
        width: 24rem;
        right: var(--size--01);
        bottom: var(--size--09);
    }

    #sec-function .l-func-tab>.c-tab-list .c-tab-btn {
        min-width: 0;
        padding: var(--size-01) var(--size-02);
    }
    

    /* function */
    #sec-function {
        padding-bottom: var(--size-08);
    }


    /* ai */
    #sec-ai.c-sec {
        padding-bottom: 14rem !important;
    }

    /* option */
    #sec-option.c-sec {
        padding-top: 14rem !important;
        padding-bottom: var(--size-08);
    }

}

@media screen and (max-width: 520px) {
    .l-mv-circle-left {
        width: clamp(35rem, 54cqw, 55rem);
        bottom: -20rem;
        left: -20rem;
    }

    .l-mv-circle-center {
        width: clamp(35rem, 54cqw, 55rem);
        top: 30%;
        left: 15%;
    }

    .l-mv-circle-right {
        width: clamp(40rem, 63cqw, 65rem);
        top: 15%;
        right: -25rem;
    }

    /* problem */
    #sec-problem .l-problem-inner {
        grid-template-columns: 1fr;
    }
}