/* ─────────────────────────────────────────────────────────
   about.css ─ 会社概要ページ専用スタイル
   コーポレートサイトの "About / Company" にあたる、堅実・公式トーン。
   - news.css と同様の中央寄せヒーロー
   - 情報は罫線でくぎられた表形式
   - 余白広め、装飾は最小限
   ───────────────────────────────────────────────────────── */

body.about-page {
    background: var(--paper);
}
body.about-page main {
    padding-top: 84px;
}
body.about-page .reveal,
body.about-page .reveal[data-stagger] > * {
    opacity: 1;
    transform: none;
}

/* ─────────── パンくず ─────────── */
.about-breadcrumb {
    border-bottom: 1px solid var(--rule-2);
    background: var(--paper);
}
.about-breadcrumb-inner {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 0;
    font-size: 11.5px;
    color: var(--ink-3);
    letter-spacing: 0.04em;
}
.about-breadcrumb a {
    color: var(--ink-3);
    text-decoration: none;
    transition: color 0.2s ease;
}
.about-breadcrumb a:hover {
    color: var(--accent);
}
.about-breadcrumb .sep {
    opacity: 0.55;
    font-size: 10px;
}
.about-breadcrumb .current {
    color: var(--ink-2);
    font-weight: 500;
}

/* ─────────── ページヒーロー(中央寄せ・公式調) ─────────── */
.about-hero {
    background: var(--paper);
    padding: clamp(64px, 9vw, 120px) 0 clamp(56px, 7vw, 96px);
    border-bottom: 1px solid var(--rule);
    text-align: center;
}
.about-hero .eyebrow {
    justify-content: center;
    margin-bottom: 28px;
}
.about-hero-title {
    font-size: clamp(44px, 6.2vw, 88px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: 0.06em;
    color: rgba(15, 20, 25, 0.14);
    margin: 0 0 18px;
    font-family: "Inter", "Noto Sans JP", sans-serif;
    text-transform: uppercase;
}
.about-hero-title .jp {
    font-family: "Noto Sans JP", sans-serif;
    font-weight: 500;
    letter-spacing: 0.08em;
    font-size: 0.32em;
    display: block;
    margin-top: 18px;
    color: var(--ink-2);
    text-transform: none;
}
.about-hero-lede {
    font-size: 14.5px;
    line-height: 2;
    color: var(--ink-2);
    max-width: 56ch;
    margin: 32px auto 0;
    font-weight: 500;
}

/* ─────────── 共同事業メッセージ(両社ロゴ並列・グラスモーフィズム) ─────────── */
.about-joint {
    padding: clamp(72px, 10vw, 120px) 0;
    border-bottom: 1px solid var(--rule);
    /* グラス効果のための淡い青系グラデ背景 */
    background:
        radial-gradient(circle at 12% 18%, rgba(37, 99, 235, 0.10) 0%, transparent 45%),
        radial-gradient(circle at 88% 82%, rgba(139, 92, 246, 0.10) 0%, transparent 50%),
        linear-gradient(180deg, #eef3fb 0%, #f4f6fa 100%);
    position: relative;
    overflow: hidden;
}
.about-joint-inner {
    text-align: center;
    position: relative;
    z-index: 1;
}
.about-joint .eyebrow {
    justify-content: center;
    margin-bottom: 28px;
}
.about-joint-title {
    font-size: clamp(22px, 2.6vw, 32px);
    font-weight: 700;
    line-height: 1.6;
    letter-spacing: 0.04em;
    color: var(--ink);
    margin: 0 0 56px;
}
.about-joint-brands {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: clamp(32px, 5vw, 64px);
    align-items: stretch;
    max-width: 920px;
    margin: 0 auto;
}
@media (max-width: 740px) {
    .about-joint-brands {
        grid-template-columns: 1fr;
    }
}
.about-joint-brand {
    /* ガラスデザイン:角丸 + 半透明 + ぼかし + 薄い枠 */
    border: 1px solid rgba(255, 255, 255, 0.55);
    background: rgba(255, 255, 255, 0.48);
    backdrop-filter: blur(22px) saturate(160%);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
    border-radius: 20px;
    padding: 40px 36px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    text-align: left;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.7),
        0 6px 14px -4px rgba(15, 20, 25, 0.08),
        0 24px 48px -16px rgba(15, 20, 25, 0.18);
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
                box-shadow 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.about-joint-brand:hover {
    transform: translateY(-4px);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.8),
        0 10px 22px -6px rgba(15, 20, 25, 0.12),
        0 36px 64px -20px rgba(15, 20, 25, 0.24);
}
.about-joint-brand-role {
    font-family: "Inter", sans-serif;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.about-joint-brand-logo {
    height: 32px;
    width: auto;
    align-self: flex-start;
    margin: 6px 0 14px;
}
.about-joint-brand-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.02em;
}
.about-joint-brand-desc {
    font-size: 13px;
    line-height: 1.95;
    color: var(--ink-2);
    margin: 0;
    font-weight: 500;
}
.about-joint-x {
    align-self: center;
    justify-self: center;
    font-family: "Noto Sans JP", sans-serif;
    font-size: 28px;
    font-weight: 300;
    color: var(--ink-3);
    line-height: 1;
}
@media (max-width: 740px) {
    .about-joint-x {
        padding: 12px 0;
    }
}

/* ─────────── 会社概要 共通スタイル(セクションヘッダー) ─────────── */
.about-section {
    padding: clamp(72px, 10vw, 120px) 0;
    border-bottom: 1px solid var(--rule);
}
.about-section-head {
    margin-bottom: clamp(40px, 5vw, 64px);
    padding-bottom: 20px;
    border-bottom: 1px solid var(--ink);
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}
.about-section-head-left {
    display: flex;
    align-items: baseline;
    gap: 18px;
}
.about-section-num {
    font-family: "Inter", sans-serif;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--ink-3);
}
.about-section h2 {
    font-size: clamp(22px, 2.6vw, 30px);
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.04em;
    margin: 0;
}
.about-section-head-en {
    font-family: "Inter", sans-serif;
    font-size: 11.5px;
    font-weight: 500;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--ink-3);
}

/* ─────────── 概要テーブル(罫線で構造化) ─────────── */
.about-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.about-table th,
.about-table td {
    padding: 22px 18px;
    text-align: left;
    border-bottom: 1px solid var(--rule);
    vertical-align: top;
    line-height: 1.9;
    color: var(--ink);
}
.about-table th {
    width: 26%;
    font-weight: 700;
    color: var(--ink-2);
    background: transparent;
    letter-spacing: 0.04em;
    font-size: 12.5px;
}
.about-table td {
    font-weight: 500;
    color: var(--ink);
}
.about-table td strong {
    font-weight: 700;
}
.about-table .sub {
    display: block;
    margin-top: 4px;
    color: var(--ink-3);
    font-size: 12px;
    letter-spacing: 0.02em;
}
.about-table a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid currentColor;
    transition: opacity 0.2s ease;
}
.about-table a:hover {
    opacity: 0.7;
}
@media (max-width: 640px) {
    .about-table th,
    .about-table td {
        display: block;
        width: 100%;
        padding: 12px 4px;
    }
    .about-table th {
        border-bottom: 0;
        padding-bottom: 4px;
        font-size: 11.5px;
    }
    .about-table td {
        padding-top: 0;
    }
}

/* ─────────── FPT 概要(2列レイアウト) ─────────── */
.about-fpt {
    background: var(--paper-2);
    border-bottom: 1px solid var(--rule);
}
.about-fpt-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(40px, 5vw, 64px);
    align-items: start;
}
@media (max-width: 880px) {
    .about-fpt-grid {
        grid-template-columns: 1fr;
    }
}
.about-fpt-logo {
    height: clamp(48px, 6vw, 72px);
    width: auto;
    display: block;
    margin: 0 0 32px;
}
.about-fpt-intro p {
    font-size: 14px;
    line-height: 2;
    color: var(--ink-2);
    margin: 0 0 20px;
    font-weight: 500;
}
.about-fpt-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
    padding: 12px 22px;
    border: 1px solid var(--ink);
    color: var(--ink);
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    border-radius: 9999px;
    background: var(--paper);
    transition: all 0.2s ease;
}
.about-fpt-cta:hover {
    background: var(--ink);
    color: var(--paper);
}
.about-fpt-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    background: transparent;
    border: 0;
}
.about-fpt-stat {
    background: var(--paper);
    padding: 28px 26px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    border-radius: 14px;
    border: 1px solid var(--rule);
    box-shadow:
        0 2px 4px rgba(15, 20, 25, 0.04),
        0 12px 24px -10px rgba(15, 20, 25, 0.10);
    transition:
        transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    position: relative;
    overflow: hidden;
}
.about-fpt-stat::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent) 0%, rgba(37, 99, 235, 0.3) 100%);
}
.about-fpt-stat:hover {
    transform: translateY(-3px);
    box-shadow:
        0 4px 8px rgba(15, 20, 25, 0.06),
        0 18px 32px -10px rgba(15, 20, 25, 0.16);
}
.about-fpt-stat-label {
    font-family: "Inter", sans-serif;
    font-size: 10.5px;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.about-fpt-stat-num {
    font-family: "Inter", sans-serif;
    font-size: clamp(28px, 3.6vw, 40px);
    font-weight: 300;
    color: var(--ink);
    line-height: 1.1;
    letter-spacing: 0.01em;
}
.about-fpt-stat-num .unit {
    font-size: 0.5em;
    font-weight: 500;
    color: var(--ink-2);
    margin-left: 4px;
    letter-spacing: 0.04em;
}
.about-fpt-stat-note {
    font-size: 11px;
    color: var(--ink-3);
    letter-spacing: 0.02em;
    line-height: 1.7;
}

/* ─────────── 沿革(タイムライン) ─────────── */
.about-history-list {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
}
.about-history-item {
    display: grid;
    grid-template-columns: 140px 18px 1fr;
    gap: 28px;
    padding: 24px 0;
    border-bottom: 1px solid var(--rule);
    align-items: baseline;
}
.about-history-item:last-child {
    border-bottom: 0;
}
.about-history-year {
    font-family: "Inter", sans-serif;
    font-size: 18px;
    font-weight: 500;
    color: var(--ink);
    letter-spacing: 0.04em;
    line-height: 1.4;
}
.about-history-year .month {
    color: var(--ink-3);
    font-size: 13px;
    font-weight: 500;
    margin-left: 6px;
}
.about-history-dot {
    align-self: center;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--paper);
    border: 2px solid var(--accent);
    margin-top: 4px;
}
.about-history-text {
    font-size: 14px;
    line-height: 1.95;
    color: var(--ink-2);
    margin: 0;
    font-weight: 500;
}
.about-history-text strong {
    color: var(--ink);
    font-weight: 700;
}
@media (max-width: 640px) {
    .about-history-item {
        grid-template-columns: 100px 14px 1fr;
        gap: 14px;
    }
    .about-history-year {
        font-size: 15px;
    }
    .about-history-year .month {
        display: block;
        margin-left: 0;
    }
}

/* ─────────── アクセス ─────────── */
.about-access-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
}
@media (max-width: 880px) {
    .about-access-grid {
        grid-template-columns: 1fr;
    }
}
.about-access-info dl {
    margin: 0;
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 12px 24px;
    font-size: 13.5px;
    line-height: 1.9;
}
.about-access-info dt {
    color: var(--ink-3);
    letter-spacing: 0.04em;
    font-weight: 500;
    padding: 14px 0;
    border-bottom: 1px solid var(--rule-2);
}
.about-access-info dd {
    margin: 0;
    color: var(--ink);
    font-weight: 500;
    padding: 14px 0;
    border-bottom: 1px solid var(--rule-2);
}
.about-access-map {
    aspect-ratio: 4 / 3;
    background:
        linear-gradient(135deg, #eef1f5 0%, #f7f9fc 100%);
    border: 1px solid var(--rule);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink-3);
    font-size: 12px;
    letter-spacing: 0.04em;
    position: relative;
    overflow: hidden;
}
.about-access-map::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(0deg, transparent 0 38px, rgba(15, 20, 25, 0.04) 38px 39px),
        repeating-linear-gradient(90deg, transparent 0 38px, rgba(15, 20, 25, 0.04) 38px 39px);
    pointer-events: none;
}
.about-access-map-pin {
    position: relative;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 8px rgba(37, 99, 235, 0.15);
}
.about-access-map-pin::after {
    content: "東京本社";
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--paper);
    padding: 4px 10px;
    border: 1px solid var(--rule);
    font-size: 11px;
    color: var(--ink);
    white-space: nowrap;
    letter-spacing: 0.04em;
    font-family: "Noto Sans JP", sans-serif;
}
.about-access-map--embed {
    background: none;
    display: block;
    padding: 0;
}
.about-access-map--embed::before {
    display: none;
}
.about-access-map--embed iframe {
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
}

/* ─────────── お問い合わせCTA(article.htmlと共通) ─────────── */
.about-contact {
    position: relative;
    overflow: hidden;
    color: var(--paper);
    padding: clamp(96px, 14vw, 160px) 0;
    background:
        radial-gradient(circle at 18% 22%, rgba(56, 189, 248, 0.18) 0%, transparent 50%),
        radial-gradient(circle at 82% 78%, rgba(139, 92, 246, 0.18) 0%, transparent 55%),
        linear-gradient(135deg, #0B1426 0%, #1a2b5e 50%, #0B1426 100%);
}
.about-contact > .container-narrow {
    position: relative;
    z-index: 1;
    text-align: center;
}
.about-contact .eyebrow,
.about-contact .eyebrow .jp {
    color: var(--paper);
    justify-content: center;
}
.about-contact .eyebrow::before {
    background: rgba(255, 255, 255, 0.4);
}
.about-contact .section-bg-label {
    font-size: clamp(32px, 4vw, 60px);
    color: rgba(255, 255, 255, 0.10);
}
.about-contact h2 {
    font-size: clamp(28px, 3.6vw, 44px);
    font-weight: 700;
    line-height: 1.5;
    letter-spacing: 0.02em;
    margin: 32px auto 24px;
    color: var(--paper);
    max-width: 24ch;
}
.about-contact-lede {
    font-size: 14.5px;
    line-height: 2;
    color: rgba(255, 255, 255, 0.75);
    max-width: 52ch;
    margin: 0 auto 48px;
    font-weight: 500;
}
.about-contact .btn-final-cta {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 50%, #1e40af 100%);
    color: #fff;
    padding: 20px 44px;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-decoration: none;
    border: 0;
    border-radius: 9999px;
    transition: transform 0.25s ease, background 0.25s ease;
}
.about-contact .btn-final-cta:hover {
    transform: translateY(-2px);
    background: linear-gradient(135deg, #2563eb 0%, #3b82f6 50%, #2563eb 100%);
}