/* ==========================================================
       ベース変数（白基調＋濃いグレー＋トープアクセント）
       ========================================================== */
    :root {
      --main: #2a2a2a;          /* 文字メイン（深いグレー） */
      --sub: #5a5a5a;           /* サブ文字 */
      --light: #888;            /* キャプション */
      --taupe: #8C7B6B;         /* ブランドアクセント */
      --deep-taupe: #6B5A4A;    /* 補助 */
      --cream: #F0EADF;         /* 薄背景 */
      --bg: #FFFFFF;
      --line: #e6e6e6;
      --line-dark: #d0d0d0;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html {
      scroll-behavior: smooth;
      /* 固定ヘッダーぶんのオフセット：anchor jump 時にセクションラベルがヘッダーに隠れないように */
      scroll-padding-top: 90px;
    }
    body {
      font-family: 'Noto Sans JP', sans-serif;
      color: var(--main);
      background: var(--bg);
      line-height: 2;             /* 行間を広めに（1.8 → 2.0） */
      letter-spacing: 0.04em;     /* 字間にゆとり */
      font-size: 16px;            /* 基本フォントを大きく（15 → 16） */
      -webkit-font-smoothing: antialiased;
    }
    /* 本文段落の標準スタイル */
    p { line-height: 2.05; }
    img { max-width: 100%; display: block; }
    a { color: inherit; text-decoration: none; }
    .serif-en { font-family: 'DM Serif Display', serif; }
    .serif-jp { font-family: 'Noto Serif JP', serif; }

    /* ==========================================================
       共通：セクション余白・見出し・矢印リンク
       ========================================================== */
    .section { padding: 120px 80px; }
    .section-inner { max-width: 1280px; margin: 0 auto; }

    .label-en {
      font-family: 'DM Serif Display', serif;
      font-size: 13px;
      letter-spacing: 0.4em;
      color: var(--taupe);
      display: inline-block;
      margin-bottom: 16px;
    }
    .heading-jp {
      font-family: 'Noto Serif JP', serif;
      font-weight: 400;
      color: var(--main);
      letter-spacing: 0.06em;
    }

    /* 「VIEW MORE / VIEW ALL」共通CTA */
    .arrow-link {
      display: inline-flex;
      align-items: center;
      gap: 14px;
      font-family: 'DM Serif Display', serif;
      font-size: 13px;
      letter-spacing: 0.3em;
      color: var(--main);
      padding-bottom: 8px;
      border-bottom: 1px solid var(--main);
      transition: color 0.3s, border-color 0.3s, gap 0.3s;
    }
    .arrow-link::after {
      content: '→';
      transition: transform 0.3s;
    }
    .arrow-link:hover { color: var(--taupe); border-color: var(--taupe); gap: 22px; }

    /* ==========================================================
       ヘッダー（白基調・固定追従）
       ========================================================== */
    header {
      position: fixed;
      top: 0; left: 0; right: 0;
      padding: 18px 40px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      z-index: 100;
      background: rgba(255,255,255,0.0);
      transition: background 0.3s, box-shadow 0.3s, padding 0.3s;
    }
    header.scrolled {
      background: rgba(255,255,255,0.97);
      box-shadow: 0 1px 0 var(--line);
      padding: 14px 40px;
    }
    /* ヒーロー上は文字白、scroll後は黒 */
    header .nav-link, header .lang-switch {
      color: #fff;
      transition: color 0.3s;
    }
    header.scrolled .nav-link,
    header.scrolled .lang-switch { color: var(--main); }
    header.scrolled .logo { color: var(--main); }

    /* ロゴ：ダブルライン × SHIKI（ブランドガイド準拠・鳥居モチーフ） */
    .logo {
      display: inline-block;
      line-height: 1;
      color: #fff;
      transition: color 0.3s;
    }
    .logo-line-top {
      width: 90px;
      height: 1px;
      background: currentColor;
    }
    .logo-text {
      font-family: 'DM Serif Display', serif;
      font-size: 22px;
      letter-spacing: 12px;
      padding: 6px 0 4px 0;
      color: currentColor;
    }
    .logo-line-bot {
      width: 90px;
      height: 2px;
      background: currentColor;
    }

    nav ul {
      display: flex;
      gap: 36px;
      list-style: none;
      align-items: center;
    }
    .nav-link {
      font-size: 13px;
      letter-spacing: 0.12em;
      padding: 8px 0;
      transition: color 0.3s;
    }
    .nav-link:hover { color: var(--taupe); }

    .lang-switch {
      font-size: 12px;
      letter-spacing: 0.1em;
      padding-left: 24px;
      border-left: 1px solid currentColor;
      opacity: 0.85;
    }
    .lang-switch .active { color: var(--taupe); font-weight: 600; }

    /* ==========================================================
       ヒーロー（大型写真＋シンプルコピー）
       ========================================================== */
    .hero {
      position: relative;
      height: 100vh;
      min-height: 640px;
      overflow: hidden;
      color: #fff;
    }
    .hero-bg {
      position: absolute;
      inset: 0;
      background: url('images/hero.jpg') center/cover no-repeat;
      filter: brightness(0.6);
      transform: scale(1.05);
      animation: zoomSlow 18s ease-out infinite alternate;
    }
    @keyframes zoomSlow {
      from { transform: scale(1.05); }
      to { transform: scale(1.15); }
    }
    .hero::after {
      /* 下部にグラデーションを敷きテキスト可読性確保 */
      content: '';
      position: absolute; inset: 0;
      background: linear-gradient(180deg, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.55) 100%);
      pointer-events: none;
    }

    .hero-inner {
      position: relative;
      z-index: 2;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 80px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .hero-tagline {
      font-family: 'DM Serif Display', serif;
      font-size: 13px;
      letter-spacing: 0.5em;
      color: rgba(255,255,255,0.85);
      margin-bottom: 28px;
    }
    .hero-title {
      font-family: 'Noto Serif JP', serif;
      font-weight: 400;
      font-size: clamp(36px, 5.5vw, 76px);
      line-height: 1.5;
      letter-spacing: 0.06em;
      margin-bottom: 32px;
      max-width: 920px;
    }
    .hero-title .accent { color: var(--taupe); }
    .hero-desc {
      max-width: 560px;
      font-size: 16px;
      line-height: 2.2;
      letter-spacing: 0.06em;
      color: rgba(255,255,255,0.9);
      font-weight: 300;
    }

    .scroll-indicator {
      position: absolute;
      bottom: 32px; left: 50%;
      transform: translateX(-50%);
      z-index: 2;
      font-family: 'DM Serif Display', serif;
      font-size: 11px;
      letter-spacing: 0.4em;
      color: rgba(255,255,255,0.7);
      writing-mode: vertical-rl;
    }
    .scroll-indicator::after {
      content: '';
      display: block;
      width: 1px; height: 36px;
      background: rgba(255,255,255,0.5);
      margin: 12px auto 0;
      animation: scrollLine 2s ease-in-out infinite;
    }
    @keyframes scrollLine {
      0%, 100% { transform: scaleY(0.3); transform-origin: top; }
      50% { transform: scaleY(1); }
    }

    /* ==========================================================
       NEWS（ファーストビュー直下）
       ========================================================== */
    .news { padding: 100px 80px; background: var(--bg); }
    .news-head {
      max-width: 1280px;
      margin: 0 auto 60px;
      display: flex;
      justify-content: space-between;
      align-items: flex-end;
      flex-wrap: wrap;
      gap: 24px;
    }
    .news-title {
      font-family: 'Noto Serif JP', serif;
      font-size: clamp(28px, 3.5vw, 44px);
      font-weight: 400;
      margin-top: 8px;
    }
    .news-list {
      max-width: 1280px;
      margin: 0 auto;
      border-top: 1px solid var(--line);
    }
    .news-item {
      display: grid;
      grid-template-columns: 130px 110px 1fr 24px;
      gap: 32px;
      align-items: center;
      padding: 28px 8px;
      border-bottom: 1px solid var(--line);
      transition: background 0.3s, padding 0.3s;
    }
    .news-item:hover { background: #fafafa; padding-left: 16px; }
    .news-date {
      font-family: 'DM Serif Display', serif;
      font-size: 14px;
      letter-spacing: 0.1em;
      color: var(--sub);
    }
    .news-cat {
      font-size: 11px;
      letter-spacing: 0.18em;
      color: var(--main);
      border: 1px solid var(--line-dark);
      padding: 4px 10px;
      text-align: center;
      justify-self: start;
    }
    .news-cat.ir { color: var(--white); background: var(--taupe); border-color: var(--taupe); }
    .news-text { font-size: 15px; line-height: 1.85; color: var(--main); letter-spacing: 0.04em; }
    .news-arrow { color: var(--taupe); font-family: 'DM Serif Display', serif; }

    /* ==========================================================
       MISSION（旧Vision・三菱地所のMISSION風に左右分割）
       ========================================================== */
    .mission { background: #fafafa; }
    .mission-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 80px;
      align-items: center;
    }
    .mission-image {
      height: 540px;
      background: url('images/mission.jpg') center/cover no-repeat;
      position: relative;
    }
    .mission-image::after {
      content: '';
      position: absolute; inset: 0;
      background: linear-gradient(135deg, rgba(140,123,107,0.08), rgba(0,0,0,0.15));
    }
    .mission-heading {
      font-size: clamp(28px, 3.8vw, 48px);
      line-height: 1.6;
      margin-bottom: 32px;
    }
    .mission-heading .accent { color: var(--taupe); }
    .mission-body p {
      font-size: 16px;
      line-height: 2.3;
      letter-spacing: 0.05em;
      color: var(--sub);
      margin-bottom: 24px;
    }
    .mission-body p:last-of-type { margin-bottom: 36px; }
    .mission-tagline {
      padding: 20px 0 0;
      border-top: 1px solid var(--line);
      margin-top: 28px;
    }
    .mission-tagline .tagline-en {
      font-family: 'DM Serif Display', serif;
      font-size: 14px;
      letter-spacing: 0.4em;
      color: var(--taupe);
    }
    .mission-tagline .tagline-jp {
      font-size: 12px;
      color: var(--light);
      letter-spacing: 0.1em;
    }

    /* ==========================================================
       BUSINESS（画像上＋テキスト下のカード型）
       ========================================================== */
    .business { background: var(--bg); }
    .business-head {
      max-width: 1280px;
      margin: 0 auto 60px;
    }
    .business-title {
      font-size: clamp(28px, 3.5vw, 44px);
      margin-top: 8px;
    }
    .business-grid {
      max-width: 1080px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 40px;
    }
    .biz-card { display: block; transition: opacity 0.3s; }
    .biz-card:hover { opacity: 0.85; }
    .biz-card:hover .biz-image-inner { transform: scale(1.05); }
    .biz-image {
      width: 100%;
      aspect-ratio: 4/3;
      overflow: hidden;
      position: relative;
      background: var(--cream);
    }
    .biz-image-inner {
      position: absolute; inset: 0;
      background-size: cover;
      background-position: center;
      transition: transform 0.6s ease-out;
    }
    .biz-num {
      position: absolute;
      top: 20px; left: 20px;
      z-index: 2;
      font-family: 'DM Serif Display', serif;
      font-size: 13px;
      letter-spacing: 0.3em;
      color: #fff;
      background: rgba(0,0,0,0.4);
      padding: 6px 14px;
    }
    .biz-body { padding: 28px 4px 0; }
    .biz-en {
      font-family: 'DM Serif Display', serif;
      font-size: 12px;
      letter-spacing: 0.3em;
      color: var(--taupe);
      margin-bottom: 10px;
    }
    .biz-concept {
      font-family: 'Noto Serif JP', serif;
      font-size: 19px;
      font-weight: 500;
      line-height: 1.6;
      letter-spacing: 0.05em;
      color: var(--main);
      margin-bottom: 12px;
      min-height: 60px;
    }
    .biz-name {
      font-size: 13px;
      font-weight: 500;
      margin-bottom: 10px;
      color: var(--sub);
      letter-spacing: 0.06em;
    }
    .biz-target {
      font-size: 11px;
      letter-spacing: 0.2em;
      color: var(--taupe);
      margin-bottom: 14px;
      padding: 4px 10px;
      border: 1px solid var(--taupe);
      display: inline-block;
    }
    .biz-desc {
      font-size: 14px;
      line-height: 2.05;
      letter-spacing: 0.04em;
      color: var(--sub);
      margin-bottom: 24px;
    }
    .biz-more {
      font-family: 'DM Serif Display', serif;
      font-size: 11px;
      letter-spacing: 0.3em;
      color: var(--main);
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .biz-more::after { content: '→'; color: var(--taupe); }

    /* ==========================================================
       MESSAGE（代表メッセージ：株主への手紙風）
       ========================================================== */
    .message { background: var(--cream); padding: 140px 80px; }
    .message-inner {
      max-width: 880px;            /* テキスト中心レイアウト：写真なし、中央寄せ */
      margin: 0 auto;
    }
    .message-portrait {
      position: relative;
      aspect-ratio: 4/5;
      background: url('images/message.jpg') center/cover no-repeat;
      overflow: hidden;
    }
    .message-portrait::before {
      /* 画像にダークグラデーションを重ね、左下キャプションを読みやすく */
      content: '';
      position: absolute; inset: 0;
      background: linear-gradient(180deg, rgba(0,0,0,0) 50%, rgba(0,0,0,0.55) 100%);
    }
    .message-portrait::after {
      content: 'AKUTSU TADASHI';
      position: absolute;
      bottom: 28px; left: 28px;
      font-family: 'DM Serif Display', serif;
      font-size: 11px;
      letter-spacing: 0.4em;
      color: rgba(255,255,255,0.95);
      z-index: 2;
    }
    .message-body {
      padding-top: 8px;
    }
    .message-title {
      font-family: 'Noto Serif JP', serif;
      font-size: clamp(28px, 3.5vw, 44px);
      font-weight: 400;
      line-height: 1.5;
      color: var(--main);
      letter-spacing: 0.06em;
      margin-top: 16px;
      margin-bottom: 36px;
    }
    .message-title .accent { color: var(--taupe); }
    .message-text p {
      font-size: 16px;
      line-height: 2.25;
      letter-spacing: 0.05em;
      color: var(--sub);
      margin-bottom: 26px;
    }
    .message-text p:last-of-type { margin-bottom: 0; }
    .message-sign {
      margin-top: 40px;
      padding-top: 28px;
      border-top: 1px solid var(--line);
    }
    .message-sign-role {
      font-size: 12px;
      color: var(--light);
      letter-spacing: 0.04em;    /* 緩めの字間に修正（0.15em→0.04em） */
      margin-bottom: 6px;
    }
    .message-sign-name {
      font-family: 'Noto Serif JP', serif;
      font-size: 22px;
      font-weight: 500;
      color: var(--main);
      letter-spacing: 0.05em;    /* 緩めの字間に修正（0.15em→0.05em） */
    }
    .message-sign-en {
      font-family: 'DM Serif Display', serif;
      font-size: 11px;
      letter-spacing: 0.3em;
      color: var(--taupe);
      margin-top: 4px;
    }

    /* ==========================================================
       OUR COMMITMENT（関係者への4つの約束）
       ========================================================== */
    .commitment {
      position: relative;
      padding: 140px 80px;
      color: #fff;
      overflow: hidden;
      background: #1a1513;
    }
    .commitment-bg {
      position: absolute; inset: 0;
      background: url('images/commitment.jpg') center/cover no-repeat;
      filter: brightness(0.45);
    }
    .commitment::after {
      content: '';
      position: absolute; inset: 0;
      background: linear-gradient(180deg, rgba(0,0,0,0.6) 0%, rgba(26,21,19,0.85) 100%);
    }
    .commitment-inner {
      position: relative;
      z-index: 2;
      max-width: 1280px;
      margin: 0 auto;
    }
    .commitment-head { text-align: center; margin-bottom: 64px; }
    .commitment-label {
      font-family: 'DM Serif Display', serif;
      font-size: 13px;
      letter-spacing: 0.5em;
      color: var(--taupe);
      display: inline-block;
      margin-bottom: 16px;
    }
    .commitment-title {
      font-family: 'Noto Serif JP', serif;
      font-size: clamp(28px, 3.8vw, 48px);
      font-weight: 400;
      line-height: 1.6;
      letter-spacing: 0.06em;
    }
    .commitment-title .accent { color: var(--taupe); }
    .commitment-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .commitment-card {
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.12);
      padding: 40px 28px;
      transition: background 0.3s, border-color 0.3s, transform 0.3s;
      backdrop-filter: blur(4px);
    }
    .commitment-card:hover {
      background: rgba(140,123,107,0.12);
      border-color: rgba(140,123,107,0.5);
      transform: translateY(-4px);
    }
    .commitment-card-num {
      font-family: 'DM Serif Display', serif;
      font-size: 11px;
      letter-spacing: 0.4em;
      color: var(--taupe);
      margin-bottom: 16px;
    }
    .commitment-card-target {
      font-family: 'Noto Serif JP', serif;
      font-size: 18px;
      font-weight: 500;
      color: #fff;
      letter-spacing: 0.08em;
      margin-bottom: 8px;
    }
    .commitment-card-en {
      font-family: 'DM Serif Display', serif;
      font-size: 11px;
      letter-spacing: 0.3em;
      color: rgba(255,255,255,0.6);
      margin-bottom: 22px;
      padding-bottom: 22px;
      border-bottom: 1px solid rgba(255,255,255,0.15);
    }
    .commitment-card-text {
      font-size: 14px;
      line-height: 2.1;
      letter-spacing: 0.04em;
      color: rgba(255,255,255,0.88);
      font-weight: 300;
    }

    /* ==========================================================
       CORPORATE LINKS（会社情報・IR・採用 3カラム）
       ========================================================== */
    .corp-links { padding: 0; }
    .corp-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);  /* 3カード横並び */
    }
    .corp-link {
      position: relative;
      padding: 100px 56px;
      min-height: 360px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      color: #fff;
      overflow: hidden;
      transition: padding 0.4s;
    }
    .corp-link:hover { padding-left: 70px; }
    .corp-link::before {
      content: '';
      position: absolute; inset: 0;
      background-size: cover; background-position: center;
      transition: transform 0.6s;
    }
    .corp-link:hover::before { transform: scale(1.08); }
    .corp-link::after {
      content: '';
      position: absolute; inset: 0;
      background: linear-gradient(180deg, rgba(0,0,0,0.45) 0%, rgba(0,0,0,0.65) 100%);
      transition: background 0.4s;
    }
    .corp-link:hover::after {
      background: linear-gradient(180deg, rgba(0,0,0,0.35) 0%, rgba(140,123,107,0.6) 100%);
    }
    .corp-link > * { position: relative; z-index: 2; }

    .corp-link.company::before { background-image: url('images/corp_company.jpg'); }
    .corp-link.business::before{ background-image: url('images/biz02.jpg'); }
    .corp-link.careers::before { background-image: url('images/corp_careers.jpg'); }
    .corp-link.contact::before { background-image: url('images/commitment.jpg'); }
    /* 旧クラス互換：必要に応じて維持 */
    .corp-link.ir::before      { background-image: url('images/corp_values.jpg'); }

    .corp-en {
      font-family: 'DM Serif Display', serif;
      font-size: 13px;
      letter-spacing: 0.4em;
      color: var(--taupe);
      margin-bottom: 16px;
    }
    .corp-jp {
      font-family: 'Noto Serif JP', serif;
      font-size: 28px;
      font-weight: 400;
      letter-spacing: 0.08em;
      margin-bottom: 16px;
    }
    .corp-desc {
      font-size: 14px;
      line-height: 2.05;
      letter-spacing: 0.04em;
      color: rgba(255,255,255,0.85);
      max-width: 340px;
      flex: 1;
    }
    .corp-arrow {
      font-family: 'DM Serif Display', serif;
      font-size: 12px;
      letter-spacing: 0.3em;
      display: inline-flex;
      align-items: center;
      gap: 12px;
      margin-top: 24px;
    }
    .corp-arrow::after { content: '→'; transition: transform 0.3s; }
    .corp-link:hover .corp-arrow::after { transform: translateX(8px); }

    /* ==========================================================
       COMPANY（会社概要テーブル）
       ========================================================== */
    .company { background: #fafafa; }
    .company-head { text-align: center; margin-bottom: 60px; }
    .company-title { font-size: clamp(28px, 3.5vw, 44px); margin-top: 8px; }
    .company-table {
      max-width: 960px;
      margin: 0 auto;
      width: 100%;
      border-collapse: collapse;
    }
    .company-table tr { border-bottom: 1px solid var(--line); }
    .company-table tr:first-child { border-top: 1px solid var(--line); }
    .company-table th {
      width: 200px;
      text-align: left;
      padding: 22px 16px 22px 0;
      font-family: 'Noto Serif JP', serif;
      font-weight: 500;
      font-size: 14px;
      color: var(--main);
      vertical-align: top;
      letter-spacing: 0.1em;
    }
    .company-table td {
      padding: 24px 0;
      font-size: 15px;
      line-height: 2.1;
      letter-spacing: 0.04em;
      color: var(--sub);
    }
    .company-table td .note {
      display: block;
      font-size: 12px;
      color: var(--light);
      margin-top: 4px;
    }

    /* ==========================================================
       CONTACT（白基調・上品）
       ========================================================== */
    .contact {
      text-align: center;
      background: var(--bg);
    }
    .contact-title {
      font-size: clamp(26px, 3.2vw, 40px);
      margin-bottom: 20px;
      margin-top: 8px;
    }
    .contact-desc {
      max-width: 640px;
      margin: 0 auto 40px;
      font-size: 15px;
      line-height: 2.15;
      letter-spacing: 0.05em;
      color: var(--sub);
    }
    .contact-cta {
      display: inline-flex;
      align-items: center;
      gap: 16px;
      padding: 20px 56px;
      background: var(--main);
      color: #fff;
      font-size: 13px;
      letter-spacing: 0.3em;
      transition: background 0.3s;
    }
    .contact-cta::after { content: '→'; }
    .contact-cta:hover { background: var(--taupe); }

    /* ==========================================================
       フッター（多段リンク群＋日英ロゴ）
       ========================================================== */
    footer {
      background: #1a1513;
      color: rgba(255,255,255,0.7);
      padding: 80px 80px 32px;
      font-size: 12px;
    }
    .footer-top {
      max-width: 1280px;
      margin: 0 auto 56px;
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 48px;
    }
    /* フッター住所表記 */
    .footer-address {
      margin-top: 18px;
      font-size: 12px;
      line-height: 2;
      color: rgba(240, 234, 223, 0.7);
      letter-spacing: 0.05em;
    }

    /* フッターロゴ：ダブルライン × SHIKI（白） */
    .footer-logo {
      display: inline-block;
      color: #fff;
      margin-bottom: 24px;
    }
    .footer-logo-line-top {
      width: 80px;
      height: 1px;
      background: rgba(255,255,255,0.7);
    }
    .footer-logo-text {
      font-family: 'DM Serif Display', serif;
      font-size: 20px;
      letter-spacing: 11px;
      padding: 6px 0 4px 0;
      color: #fff;
    }
    .footer-logo-line-bot {
      width: 80px;
      height: 2px;
      background: rgba(255,255,255,0.7);
    }
    .footer-tagline {
      font-size: 11px;
      letter-spacing: 0.2em;
      color: rgba(255,255,255,0.5);
    }
    .footer-col-title {
      font-family: 'DM Serif Display', serif;
      font-size: 12px;
      letter-spacing: 0.3em;
      color: #fff;
      margin-bottom: 18px;
    }
    .footer-col ul { list-style: none; }
    .footer-col li { margin-bottom: 10px; }
    .footer-col a {
      color: rgba(255,255,255,0.65);
      font-size: 12px;
      transition: color 0.3s;
    }
    .footer-col a:hover { color: var(--taupe); }
    .footer-bottom {
      max-width: 1280px;
      margin: 0 auto;
      border-top: 1px solid rgba(255,255,255,0.12);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 11px;
      letter-spacing: 0.1em;
      color: rgba(255,255,255,0.5);
    }

    /* ==========================================================
       レスポンシブ
       ========================================================== */
    @media (max-width: 1024px) {
      header, .section, .news, .commitment, .message, footer { padding-left: 32px; padding-right: 32px; }
      /* message-inner はもとから1カラム（写真なし）なので調整不要 */
      .commitment-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
      .hero-inner { padding: 0 32px; }
      nav ul { gap: 22px; }
      .mission-grid { grid-template-columns: 1fr; gap: 40px; }
      .mission-image { height: 360px; }
      .business-grid { grid-template-columns: repeat(2, 1fr); }
      .corp-grid { grid-template-columns: repeat(2, 1fr); }
      .corp-link { min-height: 240px; padding: 56px 32px; }
      .news-item { grid-template-columns: 100px 100px 1fr 24px; gap: 16px; }
      .footer-top { grid-template-columns: 1fr 1fr 1fr; }
    }
    @media (max-width: 640px) {
      header { padding: 12px 20px; }
      nav ul li:not(.lang-switch-li) { display: none; }
      .hero-inner { padding: 0 20px; }
      .section, .news, .commitment, .message, footer { padding-left: 20px; padding-right: 20px; padding-top: 80px; padding-bottom: 80px; }
      .commitment-grid { grid-template-columns: 1fr; }
      .business-grid { grid-template-columns: 1fr; }
      .corp-grid { grid-template-columns: 1fr; }
      .news-item { grid-template-columns: 1fr; gap: 6px; padding: 18px 0; }
      .company-table th, .company-table td { display: block; width: 100%; padding: 12px 0; }
      .company-table th { padding-bottom: 4px; }
      .footer-top { grid-template-columns: 1fr 1fr; }
    }

    /* ==========================================================
       モバイル用ハンバーガーメニュー
       ========================================================== */
    .nav-toggle {
      display: none;
      width: 36px;
      height: 36px;
      cursor: pointer;
      position: relative;
      z-index: 200;
      background: transparent;
      border: none;
      padding: 0;
      color: #fff;
      transition: color 0.3s;
    }
    header.scrolled .nav-toggle { color: var(--main); }
    .nav-toggle span {
      display: block;
      width: 28px;
      height: 1.5px;
      background: currentColor;
      margin: 8px auto;
      transition: transform 0.3s, opacity 0.3s;
    }
    /* メニュー開いた状態 → ×印 */
    .nav-toggle.open { color: #fff; }
    .nav-toggle.open span:nth-child(1) { transform: translateY(10px) rotate(45deg); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

    @media (max-width: 640px) {
      .nav-toggle { display: block; }

      /* nav 全体を全画面オーバーレイに */
      header nav {
        position: fixed;
        top: 0; left: 0; right: 0;
        height: 100vh;
        background: rgba(26,21,19,0.97);
        backdrop-filter: blur(8px);
        transform: translateX(100%);
        transition: transform 0.4s ease-out;
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 150;
      }
      header nav.open { transform: translateX(0); }
      header nav ul {
        flex-direction: column;
        gap: 28px !important;
        text-align: center;
        padding: 40px 0;
      }
      /* 隠れていた li を表示する */
      header nav ul li,
      header nav ul li:not(.lang-switch-li) { display: block !important; }
      header nav ul li a.nav-link {
        color: #fff !important;
        font-size: 18px;
        letter-spacing: 0.2em;
        padding: 8px 16px;
      }
      /* スクロールロック（メニュー開時） */
      body.menu-open { overflow: hidden; }
    }