/* business-engineering 専用。ページ固有のレイアウトと画面幅別の調整。 */
/* ===== Hero ===== */
.hero { min-height: calc(100svh - var(--header-height) - 1px); padding: 64px var(--gutter); display: flex; flex-direction: column; justify-content: center; }
.hero-inner { max-width: var(--content-wide); width: 100%; margin: 0 auto; }
.hero .eyebrow { margin-bottom: 40px; font-size: 12px; letter-spacing: 0.28em; }
.hero h1 { margin-bottom: 56px; font-size: clamp(36px, 5vw, 72px); line-height: 1.35; letter-spacing: 0; }
.hero-body { display: flex; flex-wrap: wrap; gap: 40px 80px; align-items: flex-end; }
.hero-text { flex: 2 1 520px; min-width: 0; }
.hero-lead { margin-bottom: 20px; font-size: 18px; line-height: 1.9; color: var(--color-ink-900); }
.hero-desc { max-width: 720px; font-size: 15px; line-height: 2; }
.hero-cta { flex: 1 1 280px; max-width: 320px; display: flex; flex-direction: column; gap: 12px; }

/* ===== Axis sections ===== */
.screen { display: flex; flex-wrap: wrap; min-height: 100svh; }
.band-surface { background: var(--color-surface); }
.dark { background: var(--color-ink-900); color: var(--color-white); }
.about { border-top: 1px solid var(--color-border); } /* ヒーロー下の横線は軸線と同じ色 */
.col-head {
  flex: 1 1 360px; min-width: 0;
  padding: 96px var(--axis-gap) 96px 0;
  display: flex; flex-direction: column; justify-content: center;
}
.col-body {
  flex: 2 1 560px; min-width: 0;
  padding: 96px 0 96px var(--axis-gap);
  border-left: 1px solid var(--color-border);
  display: flex; flex-direction: column; justify-content: center;
}
/* PC共通：見出し42%・本文58%。文字サイズを変えず、見出しの横幅を確保する */
@media (min-width: 1000px) {
  .col-head { flex: 0 0 42%; }
  .col-body { flex: 1 1 0; }
}
.dark .col-body { border-left-color: var(--color-dark-axis); }
.col-head .label { margin-bottom: 24px; }
.dark .label, .dark .sub { color: var(--color-dark-text-sub); }
.col-head h2 {
  font-size: clamp(30px, 3.2vw, 42px);
  line-height: 1.55;
  /* 見出しは<br>の位置でのみ改行し、収まらない場合だけ折り返す */
  word-break: keep-all;
  overflow-wrap: anywhere;
}
.col-head .intro { margin-top: 24px; font-size: 14px; line-height: 2; }

/* axis dots */
.has-dot { position: relative; }
.dot {
  position: absolute;
  left: calc(-1 * var(--axis-gap) - (var(--axis-dot) / 2));
  top: 8px;
  width: var(--axis-dot); height: var(--axis-dot);
  border-radius: 50%;
  background: var(--color-ink-900);
}
.dot.open { background: var(--color-white); border: 1px solid var(--color-ink-900); }
.dark .dot { background: var(--color-white); }
.dot.end {
  width: var(--axis-dot-end); height: var(--axis-dot-end);
  left: calc(-1 * var(--axis-gap) - (var(--axis-dot-end) / 2));
}

/* about */
.about-body { max-width: 640px; }
.about-body p { margin-bottom: 24px; font-size: 16px; line-height: 2.05; }
.about-body p:last-of-type { margin-bottom: 40px; }

/* business */
.cards { display: flex; flex-wrap: wrap; gap: 16px; }
.cards .dot { top: 38px; }
.card { flex: 1 1 300px; min-width: 0; background: var(--color-white); padding: 36px 32px; display: flex; flex-direction: column; gap: 18px; }
.card h3 { font-size: 22px; line-height: 1.65; }
.card .desc { font-size: 14px; line-height: 2; }
.card .areas { padding-top: 16px; border-top: 1px solid var(--color-surface-strong); font-size: 13px; line-height: 2.1; color: var(--color-ink-900); }
.axis + .text-link { margin-top: 32px; }

/* approach */
.process { max-width: 680px; }
.process .group { margin-bottom: 4px; font-size: 12px; letter-spacing: 0.1em; color: var(--color-ink-900); }
.process ol + .group { margin-top: 32px; }
.step { position: relative; display: flex; gap: 24px; align-items: baseline; padding: 14px 0; border-bottom: 1px solid var(--color-surface-strong); }
.step .dot { top: 22px; }
.step .head { display: contents; }
.step .num { flex: 0 0 24px; font-size: 12px; color: var(--color-ink-500); }
.step .verb { flex: 0 0 96px; font-family: var(--font-heading); font-size: 19px; font-weight: 500; color: var(--color-ink-900); }
.step .what { flex: 1 1 200px; font-size: 14px; line-height: 1.8; color: var(--color-ink-500); }
.process .note { margin-top: 24px; font-size: 13px; color: var(--color-ink-500); }

/* principles */
/* Cormorant Garamondは和文より小さく見えるため、英字見出しは一段大きく組む */
.principles .col-head h2 { font-size: clamp(40px, 4.2vw, 58px); line-height: 1.2; color: var(--color-white); }
.principle-list { display: flex; flex-direction: column; gap: 56px; }
.principle { max-width: 680px; display: flex; flex-wrap: wrap; gap: 8px 40px; }
.principle .dot { top: 26px; }
.principle .title { flex: 1 1 200px; }
.principle .word { margin-bottom: 8px; font-family: var(--font-heading); font-size: clamp(44px, 4.6vw, 64px); font-weight: 500; line-height: 1.1; color: var(--color-white); }
.principle h3 { font-size: 14px; font-weight: 500; color: var(--color-white); }
.principle .desc { flex: 1.6 1 300px; font-size: 14px; line-height: 2; }
.principles .text-link { margin-top: 40px; }

/* contact */
.contact-body { max-width: 640px; }
.contact-body .contact-message { margin-bottom: 32px; max-width: none; font-size: clamp(24px, 2.4vw, 32px); line-height: 1.6; color: var(--color-ink-900); }
.contact-body .dot { top: 16px; }
.contact-body p { max-width: 560px; font-size: 15px; line-height: 2; }
.contact-cta { margin-top: 48px; }
.contact-cta .btn { display: inline-flex; gap: 32px; min-height: 56px; min-width: 260px; padding: 0 32px; font-size: 15px; }

/* ===== Tablet（768〜999px）：見出し列と本文列を上下に積む ===== */
@media (min-width: 768px) and (max-width: 999px) {
  .col-head, .col-body { flex-basis: 100%; }
  .col-head { padding-bottom: 48px; }
  .col-body { padding-top: 0; }
  .col-head h2 { font-size: clamp(36px, 4.6vw, 42px); }
  .principles .col-head h2 { font-size: clamp(48px, 6vw, 58px); }
}

/* ===== Smartphone（〜767px） ===== */
@media (max-width: 767px) {


  .hero { padding: 72px 20px 64px; }
  .hero .eyebrow { margin-bottom: 28px; font-size: 11px; letter-spacing: 0.24em; }
  .hero h1 { margin-bottom: 36px; font-size: 34px; line-height: 1.45; letter-spacing: 0.01em; }
  .hero-body { display: block; }
  .hero-lead { margin-bottom: 16px; font-size: 16px; line-height: 1.85; }
  .hero-desc { margin-bottom: 40px; font-size: 14px; line-height: 1.95; }
  .hero-cta { max-width: none; }

  /* 1画面の高さはファーストビューのみ */
  .screen { display: block; min-height: 0; padding: 64px 20px; }
  .col-head { padding: 0; margin-bottom: 32px; display: block; }
  .col-head .label { margin-bottom: 16px; }
  .col-head h2 { font-size: 28px; }
  .col-head .intro { margin-top: 20px; font-size: 14px; line-height: 1.95; }
  .col-body { padding: 0; border-left: none; display: block; }
  /* スマートフォンの軸は内容の範囲だけに引き、リンク・CTAの手前で終える */
  .axis { border-left: 1px solid var(--color-border); padding-left: var(--axis-gap); }
  .dark .axis { border-left-color: var(--color-dark-axis); }

  .about-body p { margin-bottom: 20px; font-size: 15px; line-height: 2; }
  .about-body p:last-of-type { margin-bottom: 24px; }

  .cards { flex-direction: column; gap: 12px; }
  .cards .dot { top: 30px; }
  .card { padding: 28px 24px; gap: 14px; }
  .card h3 { font-size: 20px; line-height: 1.6; }
  .card .desc { line-height: 1.95; }
  .axis + .text-link { margin-top: 24px; }

  .step { display: block; }
  .step .dot { top: 19px; }
  .step .head { display: flex; gap: 12px; align-items: baseline; margin-bottom: 4px; }
  .step .num, .step .verb { flex: none; }
  .step .verb { font-size: 18px; }
  .process ol + .group { margin-top: 28px; }
  .process .note { margin-top: 20px; line-height: 1.8; }

  .principles.screen { padding: 72px 20px; }
  .principles .col-head { margin-bottom: 40px; }
  .principle-list { gap: 40px; }
  .principle { display: block; }
  .principles .col-head h2 { font-size: 38px; line-height: 1.25; }
  .principle .dot { top: 18px; }
  .principle .word { margin-bottom: 6px; font-size: 44px; }
  .principle h3 { margin-bottom: 12px; }
  .principle .desc { line-height: 1.95; }
  .principles .text-link { margin-top: 32px; }

  .contact.screen { padding: 80px 20px 88px; }
  .contact-body .contact-message { margin-bottom: 24px; font-size: 22px; line-height: 1.6; }
  .contact-body .dot { top: 12px; }
  .contact-body p { font-size: 14px; line-height: 1.95; }
  .contact-cta { margin-top: 36px; }
  .contact-cta .btn { display: flex; min-width: 0; padding: 0 24px; }

}



/* ===================================================================
  共通の追加（SERVICE以降のページで使用）
  =================================================================== */
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.dark .col-head h2 { color: var(--color-white); }
/* 見出し内の数字：Cormorant Garamondの数字は小さく低いため、和文見出しの書体で組む */
.heading .num-ja { font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", YuMincho, serif; }
/* 親階層の現在地（SERVICE）とスマートフォンメニューの現在地は線を常に表示する */
.global-nav a[aria-current="true"]::after,
.sp-menu a[aria-current="page"]::after { transform: scaleX(1); }

/* パンくずリスト（ヘッダー直下・1行、収まらない場合は折り返す） */
.breadcrumb .container { padding-top: 16px; }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; font-family: var(--font-label); font-size: 11px; letter-spacing: 0.14em; color: var(--color-ink-500); }
.breadcrumb li { display: flex; align-items: center; min-height: 28px; }
.breadcrumb li + li::before { content: "/"; content: "/" / ""; margin: 0 12px; color: var(--color-border); }
.breadcrumb a { color: var(--color-ink-500); text-decoration: underline; text-decoration-color: var(--color-border); text-underline-offset: 4px; }
.breadcrumb a:hover { color: var(--color-ink-900); text-decoration-color: currentColor; }
.breadcrumb [aria-current="page"] { color: var(--color-ink-900); }

/* ===================================================================
  Business Engineering
  =================================================================== */
.page-hero { min-height: calc(100svh - var(--header-height) - 45px); }
.page-hero .hero-desc { max-width: 720px; }
.page-hero .hero-desc + .hero-desc { margin-top: 16px; }
/* ボタンはサブテキストの下に置く（PCも左右に分けない） */
.page-hero .hero-body { display: block; }
.page-hero .hero-cta { margin-top: 40px; max-width: 380px; }
.page-hero .hero-cta .btn { white-space: nowrap; }
.hero-key { margin-bottom: 28px; font-size: clamp(20px, 2vw, 26px); line-height: 1.7; color: var(--color-ink-900); }

/* 4段階の循環：課題設定 → 実装 → 利用 → 改善 → 次の課題設定へ */
.cycle { margin-top: 72px; }
.cycle ol { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--color-border); }
.cycle-item { position: relative; padding: 28px 24px 0 0; }
.cycle .dot { left: 0; top: calc(-1 * var(--axis-dot) / 2 - 0.5px); }
.cycle-item .num { display: block; margin-bottom: 8px; }
.cycle-item .name { font-family: var(--font-heading); font-size: 22px; font-weight: 500; line-height: 1.4; color: var(--color-ink-900); }
.cycle-note { margin-top: 24px; font-size: 13px; color: var(--color-ink-500); }

/* 01 定義 */
.definition { max-width: 680px; }
.definition-quote { margin-bottom: 40px; font-size: clamp(24px, 2.4vw, 30px); line-height: 1.65; color: var(--color-ink-900); }
.definition .dot { top: 16px; }
.definition-body p { margin-bottom: 20px; font-size: 15px; line-height: 2.05; }
.definition-summary { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--color-border); font-size: 20px; line-height: 1.7; color: var(--color-ink-900); }

/* 02 3つのサービス領域 */
.col-head .intro + .intro { margin-top: 12px; }
.area-list { display: flex; flex-direction: column; gap: 16px; }
.area-card { position: relative; background: var(--color-white); padding: 36px 32px; }
.area-card .dot { top: 44px; }
.area-card .num { margin-bottom: 8px; }
.area-card h3 { margin-bottom: 20px; font-size: 24px; line-height: 1.5; }
.area-card dl { margin: 0; }
.area-card dt { padding-top: 14px; border-top: 1px solid var(--color-surface-strong); font-size: 12px; font-weight: 500; color: var(--color-ink-900); }
.area-card dd { margin: 6px 0 16px; font-size: 14px; line-height: 1.95; color: var(--color-ink-500); }
.area-card dd:last-child { margin-bottom: 0; }

/* 03 伴走型開発（暗いセクション） */
.col-head .kicker { margin-bottom: 8px; font-size: 13px; color: var(--color-dark-text-sub); }
.col-head .tagline { margin-top: 24px; font-size: 20px; line-height: 1.75; color: var(--color-white); }
.approach-text { max-width: 680px; margin-bottom: 56px; }
.approach-text p { font-size: 15px; line-height: 2.05; color: var(--color-white); }
.approach-text p + p { margin-top: 16px; }
.approach-text .sub { font-size: 14px; }
.approach-list { display: flex; flex-direction: column; gap: 40px; }
.approach-item { max-width: 680px; }
.approach-item .dot { top: 14px; }
.approach-item .num { margin-bottom: 8px; }
.approach-item h3 { margin-bottom: 14px; font-size: 22px; line-height: 1.5; color: var(--color-white); }
.approach-item .desc { font-size: 14px; line-height: 2; }
.roles-title { margin-top: 64px; margin-bottom: 16px; font-size: 13px; letter-spacing: 0.1em; color: var(--color-white); }
.roles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; max-width: 680px; }
.role { padding: 24px; border: 1px solid var(--color-dark-axis); }
.role h4 { margin: 0 0 10px; font-size: 14px; font-weight: 500; color: var(--color-white); }
.role p { font-size: 13px; line-height: 1.9; }

/* 04 支援の進め方（HOMEのステップ表現を流用） */
.process .step .verb { flex-basis: 120px; }
.process .note { line-height: 1.9; }

/* 05 実現する変化 */
.changes { position: relative; max-width: 680px; }
.changes .dot { top: 26px; }
.changes ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 32px; }
.changes li { padding: 20px 0; border-top: 1px solid var(--color-border); }
.changes li .num { display: block; margin-bottom: 6px; }
.changes li .text { font-size: 15px; line-height: 1.85; color: var(--color-ink-900); }

/* 06 支援実績 */
.case-intro { max-width: 680px; margin-bottom: 32px; font-size: 14px; line-height: 2; }
.case { position: relative; max-width: 680px; padding: 40px; background: var(--color-surface); }
.case .dot { top: 52px; }
.case-name { margin-bottom: 8px; font-family: var(--font-heading); font-size: 36px; font-weight: 500; line-height: 1.2; color: var(--color-ink-900); }
.case h3 { margin-bottom: 24px; font-size: 22px; line-height: 1.6; }
.case-meta { display: grid; grid-template-columns: auto 1fr; gap: 10px 20px; margin: 0 0 32px; font-size: 13px; }
.case-meta dt { font-size: 12px; color: var(--color-ink-500); }
.case-meta dd { margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.tag { display: inline-block; padding: 4px 10px; border: 1px solid var(--color-border); background: var(--color-white); font-size: 12px; line-height: 1.6; color: var(--color-ink-900); }
.case-section { padding-top: 20px; margin-top: 20px; border-top: 1px solid var(--color-surface-strong); }
.case-section h4 { margin: 0 0 8px; font-size: 13px; font-weight: 500; color: var(--color-ink-900); }
.case-section p { font-size: 14px; line-height: 2; color: var(--color-ink-700); }
.case-section p + p { margin-top: 12px; }
.case-section ul { margin: 0; padding: 0; list-style: none; }
.case-section li { position: relative; padding-left: 20px; font-size: 14px; line-height: 2; color: var(--color-ink-700); }
.case-section li::before { content: ""; position: absolute; left: 0; top: 1em; width: 10px; height: 1px; background: var(--color-ink-500); }

@media (min-width: 768px) and (max-width: 999px) {
  .cycle { margin-top: 56px; }
}

@media (max-width: 767px) {
  .page-hero { min-height: 0; }
  .hero-key { margin-bottom: 20px; font-size: 20px; }
  .page-hero .hero-desc { margin-bottom: 0; }
  .page-hero .hero-cta { margin-top: 36px; max-width: none; }
  .page-hero .hero-cta .btn { white-space: normal; }
  /* 長いボタン文言が1行に収まるよう、スマートフォンでは文字と余白を詰める */
  .page-hero .btn, .contact-cta .btn { gap: 12px; padding: 0 20px; font-size: 14px; }

  /* 循環は縦に4ステップ、最後に「次の課題設定へ戻る」 */
  .cycle { margin-top: 48px; }
  .cycle ol { grid-template-columns: 1fr; border-top: none; border-left: 1px solid var(--color-border); padding-left: var(--axis-gap); }
  .cycle-item { padding: 0 0 20px; }
  .cycle-item:last-child { padding-bottom: 0; }
  .cycle .dot { left: calc(-1 * var(--axis-gap) - (var(--axis-dot) / 2)); top: 2px; }
  .cycle-item .num { display: inline-block; margin: 0 12px 0 0; }
  .cycle-item .name { display: inline; font-size: 20px; }
  .cycle-note { margin-top: 20px; }

  .definition-quote { margin-bottom: 28px; font-size: 22px; }
  .definition .dot { top: 12px; }
  .definition-body p { font-size: 14px; line-height: 1.95; }
  .definition-summary { margin-top: 28px; font-size: 18px; }

  .area-list { gap: 12px; }
  .area-card { padding: 28px 24px; }
  .area-card .dot { top: 36px; }
  .area-card h3 { font-size: 21px; margin-bottom: 16px; }

  .col-head .tagline { margin-top: 20px; font-size: 18px; }
  .approach-text { margin-bottom: 40px; }
  .approach-text p { font-size: 14px; line-height: 1.95; }
  .approach-list { gap: 32px; }
  .approach-item { display: block; }
  .approach-item .dot { top: 12px; }
  .approach-item h3 { margin-bottom: 10px; font-size: 20px; }
  .roles-title { margin-top: 48px; }
  .roles { grid-template-columns: 1fr; }

  .process .step .verb { flex-basis: auto; }

  .changes .dot { top: 26px; }
  .changes ol { gap: 0 20px; }
  .changes li .text { font-size: 14px; }

  .case { padding: 28px 24px; }
  .case .dot { top: 38px; }
  .case-name { font-size: 30px; }
  .case h3 { font-size: 19px; margin-bottom: 20px; }
  .case-meta { grid-template-columns: 1fr; gap: 6px; }
  .case-meta dd { margin-bottom: 8px; }
}
/* 内容が長いセクション（PC）：見出し列を上端に置き、スクロール中も見出しを表示し続ける */
@media (min-width: 1000px) {
  .is-long > .col-head { justify-content: flex-start; align-self: flex-start; position: sticky; top: 0; }
}
/* 320〜359px：実現する変化は1列 */
@media (max-width: 359px) {
  .changes ol { grid-template-columns: 1fr; }
}