/* Index Page Styles */

/* Main Visual */
.index__mv {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
}

.index__mv__slider {
    height: 100%;
}

.index__mv__slide {
    height: 100%;
    background-size: cover;
    background-position: center;
    position: relative;
}

.index__mv__slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.4));
}

.index__mv__content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--color-bg-white);
    z-index: 1;
}

.index__mv__title {
    animation: fadeInUp 1s ease-out;
}

.index__mv__title--en {
    display: block;
    font-family: var(--font-family-en);
    font-size: 2rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.index__mv__title--jp {
    display: block;
    font-family: var(--font-family-heading);
    font-size: 4.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.index__mv__scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: bounce 2s infinite;
}

.index__mv__scroll span {
    display: block;
    font-family: var(--font-family-en);
    font-size: 1.2rem;
    letter-spacing: 0.1em;
    color: var(--color-bg-white);
    writing-mode: vertical-rl;
}

.index__mv__scroll::after {
    content: '';
    display: block;
    width: 1px;
    height: 60px;
    background-color: var(--color-bg-white);
    margin: 10px auto 0;
    animation: scrollLine 2s infinite;
}

/* Swiper Pagination */
.index__mv .swiper-pagination {
    bottom: 80px;
}

.index__mv .swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background-color: rgba(255, 255, 255, 0.5);
    opacity: 1;
    margin: 0 6px;
    transition: var(--transition-base);
}

.index__mv .swiper-pagination-bullet-active {
    background-color: var(--color-bg-white);
    transform: scale(1.2);
}

/* News Section */
.index__news {
    padding: 10rem 0;
    background-color: var(--color-bg-light);
}

.index__news__content {
    max-width: 800px;
    margin: 0 auto;
}

.index__news__list {
    background-color: var(--color-bg-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.index__news__item {
    border-bottom: 1px solid var(--color-border);
}

.index__news__item:last-child {
    border-bottom: none;
}

.index__news__item a {
    display: flex;
    align-items: center;
    padding: 2rem 3rem;
    transition: var(--transition-base);
}

.index__news__item a:hover {
    background-color: var(--color-bg-light);
}

.index__news__date {
    font-family: var(--font-family-en);
    font-size: 1.4rem;
    color: var(--color-text-light);
    margin-right: 2rem;
    min-width: 100px;
}

.index__news__category {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-bg-white);
    padding: 0.4rem 1.2rem;
    font-size: 1.2rem;
    border-radius: 3px;
    margin-right: 2rem;
    min-width: 80px;
    text-align: center;
}

.index__news__title {
    flex: 1;
    font-size: 1.6rem;
    font-weight: 500;
}

.index__news .btn-more {
    margin-top: 3rem;
    display: block;
    text-align: center;
}

/* Concept Section */
.index__concept {
    padding: 10rem 0;
}

.index__concept__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8rem;
    align-items: center;
}

.index__concept__lead {
    font-family: var(--font-family-heading);
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.6;
    margin-bottom: 3rem;
}

.index__concept__desc {
    font-size: 1.6rem;
    line-height: 2;
    color: var(--color-text-light);
    margin-bottom: 4rem;
}

.index__concept__image {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
}

.index__concept__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.index__concept__image:hover img {
    transform: scale(1.05);
}

/* Features Section */
.index__features {
    padding: 10rem 0;
    background-color: var(--color-bg-light);
}

.index__features__list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4rem;
}

.index__features__item {
    background-color: var(--color-bg-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition-base);
}

.index__features__item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.1);
}

.index__features__image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.index__features__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.index__features__item:hover .index__features__image img {
    transform: scale(1.1);
}

.index__features__title {
    font-size: 2rem;
    font-weight: 700;
    margin: 2rem 2rem 1rem;
}

.index__features__desc {
    font-size: 1.5rem;
    line-height: 1.8;
    color: var(--color-text-light);
    padding: 0 2rem 3rem;
}

/* Works Section */
.index__works {
    padding: 10rem 0;
}

.index__works__list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 6rem;
}

.index__works__item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
}

.index__works__item a {
    display: block;
}

.index__works__image {
    aspect-ratio: 4 / 3;
    overflow: hidden;
}

.index__works__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.index__works__item:hover .index__works__image img {
    transform: scale(1.1);
}

.index__works__title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-top: 1.5rem;
}

.index__works__info {
    font-size: 1.4rem;
    color: var(--color-text-light);
    margin-top: 0.5rem;
}

.index__works .btn-more {
    display: block;
    text-align: center;
}

/* Flow Section */
.index__flow {
    padding: 10rem 0;
    background-color: var(--color-bg-light);
}

.index__flow__list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.index__flow__item {
    background-color: var(--color-bg-white);
    padding: 3rem;
    border-radius: 8px;
    text-align: center;
    position: relative;
}

.index__flow__number {
    font-family: var(--font-family-en);
    font-size: 4rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 2rem;
}

.index__flow__title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.index__flow__desc {
    font-size: 1.5rem;
    line-height: 1.8;
    color: var(--color-text-light);
}

/* Model House Section */
.index__modelhouse {
    padding: 10rem 0;
}

.index__modelhouse__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8rem;
    align-items: center;
}

.index__modelhouse__image {
    overflow: hidden;
    border-radius: 8px;
}

.index__modelhouse__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.index__modelhouse__title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.index__modelhouse__desc {
    font-size: 1.6rem;
    line-height: 2;
    color: var(--color-text-light);
    margin-bottom: 3rem;
}

.index__modelhouse__info {
    background-color: var(--color-bg-light);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 3rem;
}

.index__modelhouse__info dt {
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.index__modelhouse__info dd {
    margin-bottom: 1.5rem;
    padding-left: 1rem;
}

.index__modelhouse__info dd:last-child {
    margin-bottom: 0;
}

/* CTA Section */
.index__cta {
    padding: 8rem 0;
    background-color: var(--color-bg-light);
    text-align: center;
}

.index__cta__title {
    font-family: var(--font-family-heading);
    font-size: 3.6rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.index__cta__desc {
    font-size: 1.8rem;
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: 4rem;
}

.index__cta__buttons {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scrollLine {
    0% {
        transform: scaleY(0);
        transform-origin: top;
    }
    50% {
        transform: scaleY(1);
        transform-origin: top;
    }
    51% {
        transform-origin: bottom;
    }
    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .index__concept__inner,
    .index__modelhouse__inner {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .index__features__list,
    .index__flow__list {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .index__works__list {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 640px) {
    .index__mv {
        height: 70vh;
        min-height: 500px;
    }
    
    .index__mv__title--en {
        font-size: 1.6rem;
    }
    
    .index__mv__title--jp {
        font-size: 3.2rem;
    }
    
    .index__news,
    .index__concept,
    .index__features,
    .index__works,
    .index__flow,
    .index__modelhouse,
    .index__cta {
        padding: 6rem 0;
    }
    
    .index__news__item a {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .index__news__date,
    .index__news__category {
        margin-bottom: 1rem;
    }
    
    .index__concept__lead {
        font-size: 2.2rem;
    }
    
    .index__features__list,
    .index__works__list,
    .index__flow__list {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .index__cta__title {
        font-size: 2.8rem;
    }
    
    .index__cta__buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary--large,
    .btn-secondary--large {
        width: 100%;
        max-width: 300px;
    }
}