/* ========================================
   ページ別CSS: Concept（表示スピード最優先）
   セクションごと画面いっぱい・繋ぎ目なし。PC＝左25%ラベル・見出し／右75%説明文。罫線でリッチに。
   ======================================== */

.concept-wrapper {
    min-height: 100vh;
}

.concept-wrapper .concept-hero,
.concept-wrapper .concept-slogan-section,
.concept-wrapper .concept-section {
    margin: 0;
}

.concept-hero {
    position: relative;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.concept-hero__media {
    position: absolute;
    inset: 0;
}

.concept-hero__img,
.concept-hero__video,
.concept-hero__poster-img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.concept-hero__video {
    position: absolute;
    inset: 0;
}

.concept-hero__poster-img {
    position: absolute;
    inset: 0;
}

.concept-hero__overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse 60% 55% at 50% 50%,
        rgba(var(--f-color-bg-rgb), 0.25) 0%,
        rgba(var(--f-color-bg-rgb), 0.4) 40%,
        rgba(var(--f-color-bg-rgb), 0.65) 70%,
        rgba(var(--f-color-bg-rgb), 0.9) 100%
    );
    pointer-events: none;
}

.concept-hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--f-space-xxl);
}

.concept-hero__title {
    font-family: var(--f-font-accent);
    font-size: clamp(var(--f-font-size-huge-xxl), 8vw, var(--f-font-size-huge-xxxxxl));
    font-weight: var(--f-font-weight-light);
    letter-spacing: var(--f-letter-spacing-widest);
    color: var(--f-color-text);
    text-shadow: var(--f-text-shadow-rich);
    margin: 0 0 var(--f-space-m);
    line-height: var(--f-line-height-tight);
}

.concept-hero__lead {
    font-size: var(--f-font-size-xl);
    letter-spacing: var(--f-letter-spacing-wide);
    color: var(--f-color-accent);
    margin: 0;
    line-height: var(--f-line-height-loose);
    text-shadow: var(--f-text-shadow-subtle);
}

.concept-hero__scroll-down {
    position: absolute;
    bottom: var(--f-space-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: var(--f-color-text);
    font-family: var(--f-font-accent);
    font-size: var(--f-font-size-base);
    letter-spacing: var(--f-letter-spacing-wider);
    text-align: center;
    opacity: 0.8;
}

.concept-hero__scroll-down::after {
    content: "";
    display: block;
    width: 1px;
    height: var(--f-space-huge);
    background: var(--f-color-text);
    margin: var(--f-space-s) auto 0;
    animation: concept-scroll-down 1.5s var(--f-ease-scroll) infinite;
}

@keyframes concept-scroll-down {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    50.1% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

.concept-slogan-section {
    position: relative;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-sizing: border-box;
    background: linear-gradient(
        165deg,
        var(--f-color-bg) 0%,
        var(--f-color-gradient-start) 50%,
        var(--f-color-gradient-end) 100%
    );
}

.concept-slogan-section__inner {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: calc(1200px * 1.3);
    margin: 0 auto;
    padding: 0 10%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: var(--f-space-xxl);
}

.concept-slogan-section__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.concept-slogan-section__header-left {
    font-family: var(--f-font-accent);
    font-size: calc(var(--f-font-size-xl) * 4 * 0.7 * 0.95);
    letter-spacing: var(--f-letter-spacing-normal);
    color: var(--f-color-text);
}

.concept-slogan-section__header-line2 {
    display: inline;
}

.concept-slogan-section__header-accent {
    color: var(--f-color-accent);
}

.concept-slogan-section__header-right {
    font-family: var(--f-font-accent);
    font-size: var(--f-font-size-xl);
    letter-spacing: var(--f-letter-spacing-widest);
    color: var(--f-color-accent);
}

.concept-slogan-section__content {
    padding-top: var(--f-space-huge-xxl);
    padding-bottom: var(--f-space-huge-xxl);
    padding-left: 0;
    padding-right: 0;
    box-sizing: border-box;
    display: grid;
    grid-template-columns: 30% 1fr;
    gap: calc(var(--f-space-huge-xl) * 0.4);
    align-items: center;
}

.concept-slogan-section__left {
    padding-left: 0;
    padding-right: 0;
    margin-left: 0;
    margin-right: 0;
    border-right: 1px solid var(--f-border-subtle);
}

.concept-slogan-section__tagline {
    font-family: var(--f-font-accent);
    font-size: clamp(calc(var(--f-font-size-huge-xxl) * 0.7), 2.24vw, calc(var(--f-font-size-huge-xxxxxl) * 0.7));
    font-weight: var(--f-font-weight-light);
    letter-spacing: var(--f-letter-spacing-wide);
    line-height: var(--f-line-height-loose);
    color: var(--f-color-text);
    margin: 0;
    text-shadow: var(--f-text-shadow-subtle);
}

.concept-slogan-section__tagline br {
    display: block;
}

.concept-slogan-section__right {
    padding-left: var(--f-space-xl);
}

.concept-slogan-section__description {
    font-size: calc(var(--f-font-size-l) * 1.1);
    line-height: var(--f-line-height-relaxed);
    color: var(--f-color-sub-lighter);
    margin: 0;
    padding-bottom: var(--f-space-xl);
    border-bottom: 2px solid var(--f-color-accent);
}

.concept-slogan-section__description::first-line {
    color: var(--f-color-accent);
    font-family: var(--f-font-accent);
    letter-spacing: var(--f-letter-spacing-wide);
}

@media (max-width: 768px) {
    .concept-slogan-section {
        padding: var(--f-space-s) 0;
        align-items: center;
        overflow: hidden;
        box-sizing: border-box;
    }

    .concept-slogan-section__inner {
        padding-left: 8%;
        padding-right: 8%;
        gap: var(--f-space-l);
        flex: 0 1 auto;
        max-height: calc(100vh - 2 * var(--f-space-s));
        justify-content: center;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .concept-slogan-section__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--f-space-m);
    }

    .concept-slogan-section__header-left {
        display: flex;
        flex-direction: column;
        gap: var(--f-space-xs);
        font-size: calc(var(--f-font-size-xl) * 4 * 0.7 * 0.95 * 0.8);
        line-height: calc(var(--f-line-height-tight) * 0.7);
    }

    .concept-slogan-section__header-line2 {
        display: block;
    }

    .concept-slogan-section__header-right {
        margin-top: var(--f-space-xxxl);
        margin-bottom: var(--f-space-s);
    }

    .concept-slogan-section__content {
        grid-template-columns: 1fr;
        gap: var(--f-space-m);
        padding-top: var(--f-space-l);
        padding-bottom: var(--f-space-l);
    }

    .concept-slogan-section__left {
        padding-right: 0;
        padding-bottom: var(--f-space-m);
        border-right: none;
        border-bottom: 1px solid var(--f-border-subtle);
    }

    .concept-slogan-section__tagline {
        text-align: left;
        font-size: clamp(calc(var(--f-font-size-huge-xl) * 0.7 * 1.2), 5.04vw, calc(var(--f-font-size-huge-xxxl) * 0.7 * 1.2));
    }

    .concept-slogan-section__right {
        padding-left: 0;
    }

    .concept-slogan-section__description {
        padding-bottom: var(--f-space-l);
    }
}

.concept-section {
    position: relative;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-sizing: border-box;
}

.concept-section__bg {
    position: absolute;
    inset: 0;
    background-image: var(--concept-bg-pc);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

@media (max-width: 768px) {
    .concept-section__bg {
        background-image: var(--concept-bg-sp);
    }
}

.concept-section__overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse 60% 55% at 50% 50%,
        rgba(var(--f-color-bg-rgb), 0.25) 0%,
        rgba(var(--f-color-bg-rgb), 0.4) 40%,
        rgba(var(--f-color-bg-rgb), 0.65) 70%,
        rgba(var(--f-color-bg-rgb), 0.9) 100%
    );
    pointer-events: none;
}

.concept-section__content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--f-space-huge-xxl) 10%;
    box-sizing: border-box;
    display: grid;
    grid-template-columns: 25% 1fr;
    gap: var(--f-space-huge-xl);
    align-items: center;
}

.concept-section__left {
    padding-right: var(--f-space-xxl);
    border-right: 1px solid var(--f-border-subtle);
}

.concept-section__label {
    display: block;
    font-family: var(--f-font-accent);
    font-size: var(--f-font-size-m);
    letter-spacing: var(--f-letter-spacing-widest);
    color: var(--f-color-accent);
    margin-bottom: var(--f-space-l);
    padding-bottom: var(--f-space-s);
    border-bottom: 1px solid var(--f-border-subtle);
}

.concept-section__title {
    font-family: var(--f-font-accent);
    font-size: clamp(var(--f-font-size-huge-l), 4vw, var(--f-font-size-huge-xxxl));
    font-weight: var(--f-font-weight-light);
    letter-spacing: var(--f-letter-spacing-wide);
    color: var(--f-color-text);
    text-shadow: var(--f-text-shadow-rich);
    margin: 0;
    line-height: var(--f-line-height-tight);
}

.concept-section__title br {
    display: block;
}

.concept-section__right {
    padding-left: var(--f-space-xxl);
}

.concept-section__description {
    font-size: var(--f-font-size-l);
    line-height: var(--f-line-height-relaxed);
    color: var(--f-color-sub-lighter);
    margin: 0;
    text-shadow: var(--f-text-shadow-subtle);
    padding-left: var(--f-space-xl);
    border-left: 2px solid var(--f-border-medium);
}

@media (max-width: 768px) {
    .concept-section__content {
        grid-template-columns: 1fr;
        gap: var(--f-space-xxl);
        padding: var(--f-space-huge-xl) 8%;
    }

    .concept-section__left {
        padding-right: 0;
        padding-bottom: var(--f-space-xl);
        border-right: none;
        border-bottom: 1px solid var(--f-border-subtle);
    }

    .concept-section__label {
        text-align: left;
    }

    .concept-section__title {
        text-align: left;
    }

    .concept-section__right {
        padding-left: 0;
    }

    .concept-section__description {
        padding-left: var(--f-space-l);
        border-left: 2px solid var(--f-border-medium);
    }
}

.concept-cta-section {
    position: relative;
    width: 100%;
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--f-space-huge-xxl) 10%;
    box-sizing: border-box;
}

.concept-cta-section__inner {
    text-align: center;
}

.concept-cta-section__text {
    font-family: var(--f-font-accent);
    font-size: var(--f-font-size-xl);
    letter-spacing: var(--f-letter-spacing-wide);
    color: var(--f-color-accent);
    margin: 0 0 var(--f-space-xxl);
}

.concept-cta-section .c-button-group {
    justify-content: center;
}