/* 新コーポレートサイト。旧会社ページの company.css とは名前空間を分ける。 */
.corporate-preview-page {
    --preview-sidebar-width: clamp(280px, 36.5vw, 460px);
    --preview-tab-width: clamp(44px, 5.2vw, 66px);
    --preview-ink: #f7f8f8;
    --preview-muted: rgba(247, 248, 248, 0.72);
    --preview-sidebar-bg: #302d2d;
    --preview-vc: #13bd3b;
    --preview-ai: #a87de2;
    --preview-paybridge: #2bc9dd;
    --preview-idol: #ef4cf2;
    --preview-about: #d10c26;
    margin: 0;
    background: var(--preview-sidebar-bg);
    color: var(--preview-ink);
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 400;
    line-height: 1.7;
    overflow-x: hidden;
}

.corporate-preview-page *,
.corporate-preview-page *::before,
.corporate-preview-page *::after {
    box-sizing: border-box;
}

.corporate-preview-page a {
    color: inherit;
}

/* デスクトップでは、左ナビを固定しながら右側の各セクションを確認できる構成にする。 */
.corporate-preview {
    display: grid;
    grid-template-columns: var(--preview-sidebar-width) minmax(0, 1fr);
    min-height: 100vh;
}

.corporate-preview__sidebar {
    background: var(--preview-sidebar-bg);
    min-height: 100vh;
    position: sticky;
    top: 0;
    z-index: 20;
}

.corporate-preview__sidebar-inner {
    display: flex;
    flex-direction: column;
    height: 100svh;
    min-height: 680px;
    padding: clamp(1.75rem, 3vw, 2.8rem) clamp(1.5rem, 3.15vw, 2.8rem) 1.8rem;
}

/* カンプの左上にある NEXIA ENTERTAINMENT のロックアップ。 */
.corporate-preview__brand {
    align-items: flex-start;
    display: inline-flex;
    gap: clamp(0.75rem, 1.4vw, 1.2rem);
    max-width: max-content;
    text-decoration: none;
}

.corporate-preview__mobile-header {
    display: contents;
}

.corporate-preview__menu-toggle {
    display: none;
}

.corporate-preview__brand-mark {
    flex: 0 0 auto;
    height: clamp(3.2rem, 5.5vw, 4.8rem);
    object-fit: contain;
    width: clamp(3.2rem, 5.5vw, 4.8rem);
}

.corporate-preview__brand-copy {
    display: flex;
    flex-direction: column;
    line-height: 0.95;
    padding-top: 0.1rem;
}

.corporate-preview__brand-name {
    color: var(--preview-about);
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(1.45rem, 2.25vw, 2.15rem);
    font-weight: 700;
    letter-spacing: 0.03em;
}

.corporate-preview__brand-name--white {
    color: var(--preview-ink);
}

.corporate-preview__brand-subtitle {
    color: var(--preview-about);
    font-size: clamp(0.56rem, 0.8vw, 0.76rem);
    font-weight: 700;
    letter-spacing: 0.06em;
    line-height: 1.25;
    margin-top: 0.35rem;
    white-space: nowrap;
}

.corporate-preview__description {
    /* コンセプト説明は白文字で表示する。 */
    color: var(--preview-ink);
    font-size: clamp(0.75rem, 0.85vw, 0.86rem);
    line-height: 2;
    margin: clamp(3rem, 5.5vw, 5.2rem) 0 0;
    max-width: 19rem;
}

/* サービス名の左側に色付きの短いラインを配置する。 */
.corporate-preview__nav {
    display: flex;
    flex-direction: column;
    gap: 0.22rem;
    margin-top: clamp(2.2rem, 4.5vw, 4.2rem);
}

.corporate-preview__nav-label {
    color: var(--preview-idol);
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(0.72rem, 0.95vw, 0.9rem);
    letter-spacing: 0.09em;
    margin-bottom: 0.55rem;
    text-transform: none;
}

.corporate-preview__nav-label--about {
    margin-bottom: 0.55rem;
    margin-top: clamp(1.5rem, 3vw, 2.5rem);
}

.corporate-preview-page .corporate-preview__nav-link {
    align-items: center;
    color: rgba(247, 248, 248, 0.48);
    display: grid;
    font-size: clamp(0.82rem, 0.98vw, 0.98rem);
    gap: 0.85rem;
    grid-template-columns: 2.2rem minmax(0, 1fr);
    letter-spacing: 0.08em;
    min-height: 2.1rem;
    text-decoration: none;
    transition: color 180ms ease, transform 180ms ease;
}

.corporate-preview__nav-link:hover,
.corporate-preview__nav-link:focus-visible,
.corporate-preview__nav-link.is-active {
    color: var(--preview-ink);
}

.corporate-preview__nav-link:focus-visible,
.corporate-preview__nav-link.is-active {
    font-size: clamp(0.94rem, 1.1vw, 1.12rem);
    font-weight: 600;
    letter-spacing: 0.1em;
}

.corporate-preview__nav-link:hover,
.corporate-preview__nav-link:focus-visible {
    transform: translateX(0.25rem);
}

.corporate-preview__nav-line {
    background: currentColor;
    display: block;
    height: 2px;
    opacity: 0.85;
    transition: background 180ms ease, opacity 180ms ease, width 180ms ease;
    width: 1.2rem;
}

.corporate-preview__nav-link.is-active .corporate-preview__nav-line,
.corporate-preview__nav-link:hover .corporate-preview__nav-line,
.corporate-preview__nav-link:focus-visible .corporate-preview__nav-line {
    opacity: 1;
    width: 2.2rem;
}

.corporate-preview__nav-link--vc .corporate-preview__nav-line {
    background: var(--preview-vc);
}

.corporate-preview__nav-link--ai .corporate-preview__nav-line {
    background: var(--preview-ai);
}

.corporate-preview__nav-link--paybridge .corporate-preview__nav-line {
    background: var(--preview-paybridge);
}

.corporate-preview__nav-link--idol .corporate-preview__nav-line {
    background: var(--preview-idol);
}

.corporate-preview__nav-link--about .corporate-preview__nav-line {
    background: var(--preview-about);
}

.corporate-preview__copyright {
    color: rgba(247, 248, 248, 0.5);
    font-size: 0.58rem;
    margin: auto 0 0;
}

/* 右側は、縦タブと背景セクションを一組にして並べる。 */
.corporate-preview__row {
    display: grid;
    grid-template-columns: var(--preview-tab-width) minmax(0, 1fr);
    min-height: clamp(680px, 64.5vw, 820px);
    scroll-margin-top: 0;
}

.corporate-preview__tab {
    align-items: center;
    color: rgba(255, 255, 255, 0.84);
    display: flex;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(0.9rem, 1.45vw, 1.35rem);
    justify-content: center;
    letter-spacing: 0.08em;
    min-height: 100%;
    overflow: hidden;
    text-align: center;
    writing-mode: vertical-rl;
}

.corporate-preview__row--vc .corporate-preview__tab {
    background: var(--preview-vc);
}

.corporate-preview__row--ai .corporate-preview__tab {
    background: var(--preview-ai);
}

.corporate-preview__row--paybridge .corporate-preview__tab {
    background: var(--preview-paybridge);
}

.corporate-preview__row--idol .corporate-preview__tab {
    background: var(--preview-idol);
}

.corporate-preview__row--about .corporate-preview__tab {
    background: var(--preview-about);
}

/* 各サービスの背景画像に薄い幕を重ね、文字を読みやすくする。 */
.corporate-preview__service {
    background-color: #03132a;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    isolation: isolate;
    min-height: 100%;
    overflow: hidden;
    position: relative;
}

.corporate-preview__service::before {
    background: linear-gradient(90deg, rgba(1, 8, 21, 0.05), rgba(1, 8, 21, 0.18) 72%, rgba(1, 8, 21, 0.32));
    content: '';
    inset: 0;
    pointer-events: none;
    position: absolute;
    z-index: -1;
}

.corporate-preview__row--vc .corporate-preview__service {
    background-image: url('../img/company-preview/nexia-vc-space-background.jpg');
}

.corporate-preview__row--ai .corporate-preview__service {
    background-image: url('../img/company-preview/nexia-ai-grid-background.jpg');
}

.corporate-preview__row--paybridge .corporate-preview__service {
    background-image: url('../img/company-preview/paybridge-factoring-background.jpg');
}

.corporate-preview__row--idol .corporate-preview__service {
    background-image: url('../img/company-preview/idol-record-background.jpg');
}

.corporate-preview__service-inner {
    display: flex;
    flex-direction: column;
    margin: 0 auto;
    max-width: 50rem;
    min-height: 100%;
    padding: clamp(4.2rem, 8.5vw, 7rem) clamp(2rem, 9vw, 8rem) clamp(3.8rem, 6vw, 5.5rem);
    position: relative;
    width: 100%;
    z-index: 1;
}

.corporate-preview__copy {
    max-width: 29rem;
}

.corporate-preview__title,
.corporate-preview__about-title {
    font-family: 'Barlow Condensed', 'Noto Sans JP', sans-serif;
    font-size: clamp(2.85rem, 4.6vw, 4.45rem);
    font-weight: 700;
    letter-spacing: 0.065em;
    line-height: 0.92;
    margin: 0 0 clamp(1.8rem, 3.2vw, 2.8rem);
    color: var(--preview-ink);
}

.corporate-preview__title-accent {
    color: var(--preview-ink);
}

.corporate-preview__row--vc .corporate-preview__title-accent {
    color: var(--preview-vc);
}

.corporate-preview__row--ai .corporate-preview__title-accent {
    color: var(--preview-ai);
}

.corporate-preview__row--paybridge .corporate-preview__title-accent {
    color: var(--preview-paybridge);
}

.corporate-preview__row--idol .corporate-preview__title {
    font-size: clamp(2.4rem, 4.2vw, 3.9rem);
}

.corporate-preview__row--idol .corporate-preview__title-accent {
    color: var(--preview-idol);
}

.corporate-preview__lead {
    color: rgba(255, 255, 255, 0.92);
    font-size: clamp(1rem, 1.48vw, 1.36rem);
    font-weight: 500;
    letter-spacing: 0.05em;
    line-height: 1.82;
    margin: 0;
}

.corporate-preview__body {
    color: rgba(255, 255, 255, 0.75);
    font-size: clamp(0.74rem, 0.86vw, 0.9rem);
    letter-spacing: 0.035em;
    line-height: 1.95;
    margin: clamp(1.4rem, 2.5vw, 2.2rem) 0 0;
}

.corporate-preview__media {
    margin: clamp(2.3rem, 4.5vw, 4rem) auto 0;
    max-width: 31rem;
    width: 100%;
}

.corporate-preview__media img {
    display: block;
    height: auto;
    width: 100%;
}

/* PayBridge とアイドルレコードの3枚カード。背景に馴染む暗い面と色付きの上線で整理する。 */
.corporate-preview__cards {
    display: grid;
    gap: clamp(0.45rem, 1vw, 0.8rem);
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: clamp(2rem, 3.5vw, 3.2rem);
    width: 100%;
}

.corporate-preview__card {
    background: rgba(40, 37, 38, 0.86);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-top: 2px solid currentColor;
    min-height: 10rem;
    padding: clamp(0.8rem, 1.3vw, 1.1rem) clamp(0.65rem, 1.1vw, 0.95rem);
}

.corporate-preview__row--paybridge .corporate-preview__card {
    color: var(--preview-paybridge);
}

.corporate-preview__row--idol .corporate-preview__card {
    color: var(--preview-idol);
}

.corporate-preview__card-number {
    display: block;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(1.5rem, 2.3vw, 2.1rem);
    letter-spacing: 0.08em;
    line-height: 1;
    opacity: 0.76;
}

.corporate-preview__card h3 {
    color: rgba(255, 255, 255, 0.88);
    font-size: clamp(0.78rem, 0.95vw, 0.98rem);
    font-weight: 500;
    line-height: 1.6;
    margin: 1rem 0 0;
}

.corporate-preview__card p {
    color: rgba(255, 255, 255, 0.58);
    font-size: clamp(0.64rem, 0.74vw, 0.76rem);
    letter-spacing: 0.025em;
    line-height: 1.65;
    margin: 0.8rem 0 0;
}

/* ABOUT は明るい面に切り替え、会社情報を同じ赤でまとめる。 */
.corporate-preview__row--about {
    min-height: clamp(700px, 70vw, 900px);
}

.corporate-preview__about {
    background: #d8d8da;
    color: var(--preview-about);
    min-height: 100%;
}

.corporate-preview__about-inner {
    margin: 0 auto;
    max-width: 50rem;
    padding: clamp(5rem, 10vw, 9rem) clamp(2rem, 9vw, 8rem) 5rem;
    width: 100%;
}

.corporate-preview__about-title {
    color: var(--preview-about);
    margin-bottom: clamp(2rem, 3.5vw, 3.2rem);
}

.corporate-preview__details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 0;
}

.corporate-preview__details div {
    margin: 0;
}

.corporate-preview__details dt {
    height: 1px;
    overflow: hidden;
    position: absolute;
    width: 1px;
}

.corporate-preview__details dd {
    color: var(--preview-about);
    font-size: clamp(0.72rem, 0.9vw, 0.92rem);
    font-weight: 500;
    line-height: 1.8;
    margin: 0;
}

.corporate-preview__details a {
    text-decoration: none;
}

.corporate-preview__details a:hover,
.corporate-preview__details a:focus-visible {
    text-decoration: underline;
}

/* 狭い画面では左ナビを上部にまとめ、縦タブを横長の見出しへ変換する。 */
@media (max-width: 900px) {
    .corporate-preview {
        display: block;
    }

    .corporate-preview__sidebar {
        min-height: 0;
        position: static;
    }

    .corporate-preview__sidebar-inner {
        display: block;
        height: auto;
        min-height: 0;
        padding: 1rem 1.25rem 0;
    }

    .corporate-preview__mobile-header {
        align-items: center;
        display: flex;
        gap: 0.75rem;
        justify-content: space-between;
    }

    .corporate-preview__brand {
        align-items: center;
        gap: 0.65rem;
    }

    .corporate-preview__brand-mark {
        height: 2.7rem;
        width: 2.7rem;
    }

    .corporate-preview__brand-name {
        font-size: 1.25rem;
    }

    .corporate-preview__brand-subtitle {
        font-size: 0.56rem;
        margin-top: 0.2rem;
    }

    .corporate-preview__menu-toggle {
        align-items: center;
        background: transparent;
        border: 1px solid rgba(247, 248, 248, 0.45);
        border-radius: 0.2rem;
        color: var(--preview-ink);
        cursor: pointer;
        display: inline-flex;
        flex: 0 0 auto;
        height: 2.75rem;
        justify-content: center;
        padding: 0;
        transition: background-color 180ms ease, border-color 180ms ease;
        width: 2.75rem;
    }

    .corporate-preview__menu-toggle:hover,
    .corporate-preview__menu-toggle:focus-visible,
    .corporate-preview__menu-toggle[aria-expanded='true'] {
        background: rgba(247, 248, 248, 0.12);
        border-color: var(--preview-ink);
    }

    .corporate-preview__menu-icon {
        display: grid;
        gap: 0.28rem;
        width: 1.1rem;
    }

    .corporate-preview__menu-icon span {
        background: currentColor;
        display: block;
        height: 2px;
        transition: transform 180ms ease, opacity 180ms ease;
        width: 100%;
    }

    .corporate-preview__menu-toggle[aria-expanded='true'] .corporate-preview__menu-icon span:nth-child(1) {
        transform: translateY(0.4rem) rotate(45deg);
    }

    .corporate-preview__menu-toggle[aria-expanded='true'] .corporate-preview__menu-icon span:nth-child(2) {
        opacity: 0;
    }

    .corporate-preview__menu-toggle[aria-expanded='true'] .corporate-preview__menu-icon span:nth-child(3) {
        transform: translateY(-0.4rem) rotate(-45deg);
    }

    .corporate-preview__description {
        font-size: 0.75rem;
        line-height: 1.7;
        margin: 0.9rem 0 0;
        max-width: none;
    }

    .corporate-preview__nav {
        display: none;
        gap: 0.2rem 0.5rem;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        margin: 0.7rem -1.25rem 0;
        padding: 0.6rem 1.25rem 0.8rem;
    }

    .corporate-preview__nav.is-open {
        display: grid;
    }

    .corporate-preview__nav-label {
        display: none;
    }

    .corporate-preview-page .corporate-preview__nav-link {
        min-width: 0;
        font-size: 0.8rem;
        gap: 0.35rem;
        grid-template-columns: 1.7rem minmax(0, 1fr);
        min-height: 2.75rem;
        padding: 0 0.45rem;
        line-height: 1.35;
        white-space: normal;
    }

    .corporate-preview__nav-link:focus-visible,
    .corporate-preview__nav-link.is-active {
        font-size: 0.92rem;
        letter-spacing: 0.1em;
    }

    .corporate-preview__nav-line {
        width: 0.7rem;
    }

    .corporate-preview__nav-link.is-active .corporate-preview__nav-line,
    .corporate-preview__nav-link:hover .corporate-preview__nav-line,
    .corporate-preview__nav-link:focus-visible .corporate-preview__nav-line {
        width: 1.7rem;
    }

    .corporate-preview__copyright {
        display: none;
    }

    .corporate-preview__row {
        display: block;
        min-height: 0;
    }

    .corporate-preview__tab {
        align-items: center;
        font-size: 0.82rem;
        justify-content: flex-start;
        letter-spacing: 0.12em;
        min-height: 2.15rem;
        padding: 0 1.25rem;
        text-align: left;
        writing-mode: horizontal-tb;
    }

    .corporate-preview__service {
        min-height: 0;
    }

    .corporate-preview__service-inner {
        min-height: 0;
        padding: 3.4rem 1.4rem 4rem;
    }

    .corporate-preview__title {
        font-size: clamp(3rem, 11.2vw, 4.45rem);
    }

    .corporate-preview__row--idol .corporate-preview__title {
        font-size: clamp(2.5rem, 9.5vw, 3.9rem);
    }

    .corporate-preview__lead {
        font-size: 1.08rem;
    }

    .corporate-preview__body {
        font-size: 0.8rem;
        line-height: 1.9;
    }

    .corporate-preview__media {
        margin-top: 2.6rem;
    }

    .corporate-preview__cards {
        grid-template-columns: 1fr;
    }

    .corporate-preview__card {
        min-height: 0;
    }

    .corporate-preview__row--about {
        min-height: 0;
    }

    .corporate-preview__about-inner {
        padding: 4rem 1.4rem 5rem;
    }
}

/* 320px前後では、長いサービス名を確実に収めるためナビを1列にする。 */
@media (max-width: 360px) {
    .corporate-preview__nav {
        grid-template-columns: 1fr;
    }
}

/* 901〜1100pxではサイドバーを保ちつつ、本文とカードの幅を確保する。 */
@media (min-width: 901px) and (max-width: 1100px) {
    .corporate-preview__service-inner,
    .corporate-preview__about-inner {
        padding-left: clamp(2rem, 5.5vw, 4.5rem);
        padding-right: clamp(2rem, 5.5vw, 4.5rem);
    }
}

@media (prefers-reduced-motion: reduce) {
    .corporate-preview__menu-toggle,
    .corporate-preview__menu-icon span,
    .corporate-preview__nav-link,
    .corporate-preview__nav-line {
        transition: none;
    }
}