/**
 * Income Strategy Guide — income_strategy_guide.css
 *
 * 設計思想:
 *   - #isg-root 配下のみ完全独立デザイン
 *   - Cocoon / entry-content / article 干渉を完全排除
 *   - CSS カスタムプロパティで全色・全値を管理
 *   - モバイルファースト + clamp() 流体タイポグラフィ
 *   - アニメーションは opacity / transform / filter のみ使用
 *   - カラーパレット: ダークインク（#1a1410）× ゴールド（#c8993a）× アイボリー（#faf7f2）
 *     ライトセクションはウォームペーパー（#faf7f2 / #f2ece0）を使い
 *     プレミアム editorial book の美学を体現する
 *   - フォント: DM Serif Display（欧文Display） + Noto Serif JP + Noto Sans JP
 *
 * @package cocoon-child-master
 */


/* ================================================================
   1. COCOON 干渉リセット
   ================================================================ */
.income_strategy_guide .article,
.income_strategy_guide .entry-content,
.income_strategy_guide .main,
.income_strategy_guide .content,
.income_strategy_guide .wrap,
.income_strategy_guide #main,
.income_strategy_guide #body-in,
.income_strategy_guide #container,
.income_strategy_guide #container-in,
.income_strategy_guide #contents,
.income_strategy_guide #contents-in {
  display: block !important;
  width: 100% !important;
  max-width: 100% !important;
  padding: 0 !important;
  margin: 0 !important;
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  float: none !important;
  position: static !important;
  overflow: visible !important;
  height: auto !important;
  min-height: 0 !important;
  flex: none !important;
}

.income_strategy_guide #sidebar,
.income_strategy_guide .sidebar,
.income_strategy_guide #sidebar-scroll,
.income_strategy_guide .sidebar-top,
.income_strategy_guide .sidebar-bottom {
  display: none !important;
}

.income_strategy_guide #footer:not(.tp-footer),
.income_strategy_guide .site-footer:not(.tp-footer),
.income_strategy_guide .footer:not(.tp-footer) {
  display: none !important;
}

/* scroll-padding: tp-headerの固定高さ分 */
html.income_strategy_guide-html {
  scroll-padding-top: 70px;
}


/* ================================================================
   2. CSS カスタムプロパティ（全色・全値）
   ================================================================ */
#isg-root {
  /* ─ カラーパレット ─ */
  --isg-bg:          #1a1410;
  --isg-bg-2:        #22201c;
  --isg-bg-card:     #2c2824;
  --isg-bg-light:    #faf7f2;
  --isg-bg-warm:     #f2ece0;
  --isg-bg-warm-2:   #e8dfd0;
  --isg-gold:        #c8993a;
  --isg-gold-bright: #e8c060;
  --isg-gold-light:  rgba(200, 153, 58, 0.15);
  --isg-gold-glow:   rgba(200, 153, 58, 0.06);
  --isg-teal:        #1a7a6e;
  --isg-teal-light:  #2ecc71;
  --isg-red:         #c0392b;
  --isg-red-soft:    #e74c3c;
  --isg-blue:        #1e3a5f;
  --isg-blue-mid:    #2980b9;
  --isg-text:        #faf7f2;
  --isg-text-2:      #c8b89a;
  --isg-text-muted:  rgba(250, 247, 242, 0.55);
  --isg-text-ink:    #1a1410;
  --isg-text-ink-2:  #3d3530;
  --isg-text-ink-m:  #6b5f57;
  --isg-rule:        #c8b89a;
  --isg-border:      rgba(200, 153, 58, 0.22);
  --isg-border-ink:  #c8b89a;

  /* ─ タイポグラフィ ─ */
  --isg-font-sans:    'Noto Sans JP', sans-serif;
  --isg-font-serif:   'Noto Serif JP', serif;
  --isg-font-display: 'DM Serif Display', serif;

  /* ─ スペーシング ─ */
  --isg-section-py:    clamp(3.5rem, 7vw, 7rem);
  --isg-container-max: 860px;
  --isg-container-wide: 1100px;
  --isg-radius:         8px;
  --isg-radius-sm:      4px;
  --isg-radius-lg:      20px;

  /* ─ トランジション ─ */
  --isg-transition:      0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --isg-transition-slow: 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}


/* ================================================================
   3. GLOBAL RESET — #isg-root スコープ
   ================================================================ */
#isg-root,
#isg-root *,
#isg-root *::before,
#isg-root *::after {
  box-sizing: border-box;
}

#isg-root h1,
#isg-root h2,
#isg-root h3,
#isg-root h4,
#isg-root h5,
#isg-root h6,
#isg-root p,
#isg-root ul,
#isg-root ol,
#isg-root li,
#isg-root figure,
#isg-root blockquote,
#isg-root dl,
#isg-root dd {
  margin: 0;
  padding: 0;
}

#isg-root ul,
#isg-root ol {
  list-style: none;
}

#isg-root {
  background-color: var(--isg-bg);
  color: var(--isg-text);
  font-family: var(--isg-font-sans);
  font-weight: 300;
  line-height: 1.9;
  overflow-x: clip;
  overflow-y: visible;
  position: relative;
  width: 100%;
  max-width: 100%;
  padding: 0;
  margin: 0;
  overflow-wrap: break-word;
  word-break: normal;
  word-break: auto-phrase;
}

/* ─ Cocoon blockquote 白抜き完全解消 ─ */
#isg-root blockquote {
  background: var(--isg-bg-warm) !important;
  border-left: 5px solid var(--isg-gold) !important;
  border-right: none !important;
  color: var(--isg-text-ink) !important;
  padding: 1.5rem 1.75rem !important;
  margin: 0 !important;
  box-shadow: none !important;
  border-radius: 0 !important;
}

#isg-root blockquote::before,
#isg-root blockquote::after {
  display: none !important;
}


/* ================================================================
   4. レイアウト共通コンポーネント
   ================================================================ */
.isg-container {
  max-width: var(--isg-container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.isg-container--wide {
  max-width: var(--isg-container-wide);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.isg-section {
  padding-block: var(--isg-section-py);
  position: relative;
}

.isg-section--paper {
  background-color: var(--isg-bg-light);
  color: var(--isg-text-ink);
}

.isg-section--warm {
  background-color: var(--isg-bg-warm);
  color: var(--isg-text-ink);
}

/* ================================================================
   5. スクロールリビール
   ================================================================ */
.isg-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity  0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.isg-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.isg-reveal[data-delay="1"] { transition-delay: 0.1s; }
.isg-reveal[data-delay="2"] { transition-delay: 0.2s; }
.isg-reveal[data-delay="3"] { transition-delay: 0.3s; }
.isg-reveal[data-delay="4"] { transition-delay: 0.4s; }
.isg-reveal[data-delay="5"] { transition-delay: 0.5s; }


/* ================================================================
   6. テーブル・blockquote 白抜き対策（必須）
   ================================================================ */
.isg-table-wrap {
  overflow-x: auto;
  margin-block: 1.75rem;
  border: 1px solid var(--isg-border-ink);
  border-radius: 0;
  -webkit-overflow-scrolling: touch;
}

.isg-table {
  width: 100%;
  border-collapse: collapse;
  font-size: clamp(0.75rem, 1.4vw, 0.875rem);
  background: transparent !important;
}

.isg-table thead {
  background: var(--isg-bg) !important;
}

.isg-table thead th {
  background: var(--isg-bg) !important;
  color: var(--isg-bg-light) !important;
  padding: 0.875rem 1.125rem;
  text-align: left;
  font-family: var(--isg-font-sans);
  font-weight: 500;
  font-size: clamp(0.7rem, 1.3vw, 0.8125rem);
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--isg-gold);
  white-space: nowrap;
}

.isg-table tbody td {
  background: transparent !important;
  color: var(--isg-text-ink-2) !important;
  padding: 0.75rem 1.125rem;
  border-bottom: 1px solid var(--isg-bg-warm-2);
  vertical-align: top;
  line-height: 1.7;
}

.isg-table tbody td:first-child {
  font-weight: 600;
  color: var(--isg-text-ink) !important;
  white-space: nowrap;
}

.isg-table tbody tr:nth-child(even) td {
  background: var(--isg-bg-warm) !important;
}

.isg-table tbody tr:last-child td {
  border-bottom: none;
}

.isg-table tbody tr:hover td {
  background: var(--isg-bg-warm-2) !important;
}

.isg-table-row--special td {
  background: #fdf8ee !important;
  font-weight: 700 !important;
  color: var(--isg-text-ink) !important;
}

/* 背景が暗いセクション内のテーブル */
.isg-chapter-header .isg-table-wrap,
.isg-cta-mid .isg-table-wrap,
.isg-cta-final .isg-table-wrap {
  border-color: var(--isg-border);
}


/* ================================================================
   7. COVER セクション
   ================================================================ */
.isg-cover {
  background-color: var(--isg-bg);
  color: var(--isg-text);
  min-height: 100svh;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: clamp(5rem, 10vh, 7rem) clamp(1.5rem, 7vw, 6rem) clamp(7rem, 14vh, 10rem);
  position: relative;
  overflow: hidden;
}

/* 横罫線テクスチャ */
.isg-cover__bg-img {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 59px,
      rgba(200, 153, 58, 0.065) 59px,
      rgba(200, 153, 58, 0.065) 60px
    );
  transform-origin: center top;
  will-change: transform;
}

/* 右上ゴールドグロー */
.isg-cover__overlay {
  position: absolute;
  right: -80px;
  top: -80px;
  width: clamp(320px, 50vw, 600px);
  height: clamp(320px, 50vw, 600px);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 153, 58, 0.1) 0%, transparent 68%);
  pointer-events: none;
}

.isg-cover__inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.isg-cover__label {
  font-family: var(--isg-font-sans);
  font-weight: 700;
  font-size: clamp(0.625rem, 1.2vw, 0.6875rem);
  letter-spacing: 0.28em;
  color: var(--isg-gold);
  text-transform: uppercase;
  margin-bottom: 2.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(200, 153, 58, 0.4);
  display: inline-block;
  width: clamp(200px, 40vw, 320px);
}

.isg-cover__title {
  font-family: var(--isg-font-serif);
  font-weight: 900;
  font-size: clamp(2.75rem, 8vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  color: var(--isg-text);
}

.isg-cover__title span {
  color: var(--isg-gold);
}

.isg-cover__subtitle {
  font-family: var(--isg-font-sans);
  font-weight: 300;
  font-size: clamp(0.875rem, 2.2vw, 1rem);
  color: rgba(250, 247, 242, 0.68);
  max-width: 540px;
  line-height: 1.85;
  margin-bottom: 2.5rem;
}

.isg-cover__subtitle em {
  font-family: var(--isg-font-serif);
  font-size: 0.85em;
  opacity: 0.75;
  font-style: italic;
}

.isg-cover__tags {
  display: flex;
  gap: 0.625rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.isg-cover__tag {
  border: 1px solid rgba(200, 153, 58, 0.45);
  color: var(--isg-gold-bright);
  font-size: clamp(0.625rem, 1.3vw, 0.6875rem);
  font-weight: 500;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.75rem;
  font-family: var(--isg-font-sans);
  transition: background-color var(--isg-transition), color var(--isg-transition);
}

.isg-cover__tag:hover {
  background-color: rgba(200, 153, 58, 0.12);
}

/* CTA ブロック */
.isg-cover__cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}

.isg-cover__cta-sub {
  font-size: 0.75rem;
  color: rgba(250, 247, 242, 0.45);
  letter-spacing: 0.08em;
  font-family: var(--isg-font-sans);
}

/* カバーフッター */
.isg-cover__footer {
  position: absolute;
  bottom: clamp(2rem, 5vh, 3.5rem);
  left: clamp(1.5rem, 7vw, 6rem);
  right: clamp(1.5rem, 7vw, 6rem);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  z-index: 1;
  border-top: 1px solid rgba(200, 153, 58, 0.18);
  padding-top: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.isg-cover__footer-text,
.isg-cover__footer-author {
  font-size: clamp(0.6rem, 1.1vw, 0.6875rem);
  letter-spacing: 0.12em;
  color: rgba(250, 247, 242, 0.38);
  font-family: var(--isg-font-sans);
}

.isg-cover__footer-author {
  font-family: var(--isg-font-serif);
  font-size: clamp(0.625rem, 1.2vw, 0.75rem);
}

/* スクロールインジケーター */
.isg-cover__scroll {
  position: absolute;
  right: clamp(1.5rem, 5vw, 4rem);
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.625rem;
  z-index: 1;
}

.isg-cover__scroll-text {
  font-size: 0.5625rem;
  letter-spacing: 0.3em;
  color: rgba(200, 153, 58, 0.55);
  font-family: var(--isg-font-sans);
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.isg-cover__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, rgba(200, 153, 58, 0.5), transparent);
  animation: isg-scroll-pulse 2.2s ease-in-out infinite;
}

@keyframes isg-scroll-pulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50%       { opacity: 0.8; transform: scaleY(1.15); }
}


/* ================================================================
   8. CTA ボタン（共通）
   ================================================================ */
.isg-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--isg-font-serif);
  font-size: clamp(0.9375rem, 2.2vw, 1.0625rem);
  font-weight: 600;
  color: var(--isg-bg) !important;
  letter-spacing: 0.04em;
  padding: 1.125rem clamp(2rem, 5vw, 3.5rem);
  text-decoration: none !important;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--isg-transition), box-shadow var(--isg-transition);
  border-radius: 0;
  min-width: 200px;
  white-space: nowrap;
}

.isg-cta-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 25%,
    rgba(255, 255, 255, 0.22) 50%,
    transparent 75%
  );
  transform: translateX(-110%);
  transition: transform 0.65s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.isg-cta-btn:hover::before {
  transform: translateX(110%);
}

.isg-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(200, 153, 58, 0.32);
}

.isg-cta-btn:active {
  transform: translateY(0);
}


/* ================================================================
   9. チャプターヘッダー
   ================================================================ */
.isg-chapter-header {
  background-color: var(--isg-bg);
  color: var(--isg-text);
  padding: clamp(4rem, 9vw, 7rem) clamp(1.5rem, 7vw, 6.25rem) clamp(3rem, 6vw, 5rem);
  position: relative;
  overflow: hidden;
  border-left: 5px solid var(--isg-gold);
}

.isg-chapter-header::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(to left, rgba(200, 153, 58, 0.04), transparent);
  pointer-events: none;
}

.isg-chapter-header__number {
  font-family: var(--isg-font-display);
  font-size: clamp(6rem, 16vw, 13rem);
  color: rgba(200, 153, 58, 0.1);
  position: absolute;
  right: clamp(1rem, 5vw, 4rem);
  top: -0.1em;
  line-height: 1;
  letter-spacing: -0.06em;
  pointer-events: none;
  user-select: none;
  font-style: italic;
}

.isg-chapter-header__inner {
  position: relative;
  z-index: 1;
  max-width: var(--isg-container-max);
}

.isg-chapter-header__label {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.625rem, 1.3vw, 0.6875rem);
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--isg-gold);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.isg-chapter-header__title {
  font-family: var(--isg-font-serif);
  font-size: clamp(1.625rem, 4.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.28;
  color: var(--isg-text);
  max-width: 640px;
  margin-bottom: 1rem;
}

.isg-chapter-header__desc {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.8125rem, 1.8vw, 0.9375rem);
  color: rgba(250, 247, 242, 0.55);
  max-width: 520px;
  line-height: 1.75;
  font-weight: 300;
}


/* ================================================================
   10. コンテンツセクション内の見出し・テキスト
   ================================================================ */
.isg-section--paper h2,
.isg-section--warm h2 {
  font-family: var(--isg-font-serif);
  font-size: clamp(1.375rem, 3.5vw, 1.75rem);
  font-weight: 700;
  color: var(--isg-text-ink);
  margin-block: 3rem 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--isg-text-ink);
  line-height: 1.4;
}

.isg-section--paper h3,
.isg-section--warm h3 {
  font-family: var(--isg-font-serif);
  font-size: clamp(1.0625rem, 2.5vw, 1.25rem);
  font-weight: 600;
  color: var(--isg-text-ink-2);
  margin-block: 2.25rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  line-height: 1.45;
}

.isg-section--paper h3::before,
.isg-section--warm h3::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.1em;
  background: var(--isg-gold);
  flex-shrink: 0;
  border-radius: 2px;
}

.isg-section--paper h4,
.isg-section--warm h4 {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.75rem, 1.6vw, 0.875rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--isg-text-ink-m);
  margin-block: 1.5rem 0.5rem;
  text-transform: uppercase;
}

.isg-section--paper p,
.isg-section--warm p {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.875rem, 1.9vw, 0.9375rem);
  color: var(--isg-text-ink-2);
  line-height: 1.95;
  margin-bottom: 1rem;
}

.isg-section--paper strong,
.isg-section--warm strong {
  font-weight: 700;
  color: var(--isg-text-ink);
}

/* 付録セクション */
.isg-appendix {
  background-color: var(--isg-bg-warm);
  color: var(--isg-text-ink);
  padding-block: var(--isg-section-py);
  border-top: 3px solid var(--isg-text-ink);
}

.isg-appendix h2 {
  font-family: var(--isg-font-serif);
  font-size: clamp(1.375rem, 3.5vw, 1.75rem);
  font-weight: 700;
  color: var(--isg-text-ink);
  margin-block: 1rem 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--isg-text-ink);
}

.isg-appendix p {
  color: var(--isg-text-ink-2);
  font-size: 0.9375rem;
  line-height: 1.9;
  margin-bottom: 1rem;
}


/* ================================================================
   11. 前書き・イントロパネル
   ================================================================ */
.isg-intro-panel {
  background: var(--isg-bg-warm);
  border: 1px solid var(--isg-border-ink);
  padding: clamp(1.75rem, 4vw, 2.75rem) clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 3rem;
  position: relative;
}

.isg-intro-panel::before {
  content: '—';
  font-family: var(--isg-font-display);
  font-size: clamp(4rem, 8vw, 6rem);
  color: rgba(200, 153, 58, 0.2);
  position: absolute;
  top: -0.15em;
  left: 1.25rem;
  line-height: 1;
  pointer-events: none;
}

.isg-intro-panel p {
  font-family: var(--isg-font-serif);
  font-size: clamp(0.9375rem, 2.2vw, 1.125rem);
  line-height: 1.95;
  color: var(--isg-text-ink);
  font-weight: 400;
  margin-bottom: 0 !important;
}

/* 目次リスト */
.isg-list-ordered {
  counter-reset: isg-counter;
  padding: 0;
  margin-block: 1.5rem 0;
}

.isg-list-ordered li {
  counter-increment: isg-counter;
  font-family: var(--isg-font-sans);
  font-size: clamp(0.875rem, 1.9vw, 0.9375rem);
  color: var(--isg-text-ink-2);
  padding: 0.625rem 0 0.625rem 2.25rem;
  border-bottom: 1px solid var(--isg-bg-warm-2);
  line-height: 1.7;
  position: relative;
}

.isg-list-ordered li::before {
  content: counter(isg-counter, decimal-leading-zero);
  position: absolute;
  left: 0;
  color: var(--isg-gold);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  top: 0.85rem;
  font-family: var(--isg-font-display);
  font-style: italic;
}

.isg-list-ordered li strong {
  font-weight: 700;
  color: var(--isg-text-ink);
}

/* スタイルドリスト */
.isg-list-styled {
  padding: 0;
  margin-block: 1rem 0;
}

.isg-list-styled li {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.875rem, 1.9vw, 0.9375rem);
  color: var(--isg-text-ink-2);
  padding: 0.625rem 0 0.625rem 1.5rem;
  border-bottom: 1px solid var(--isg-bg-warm-2);
  line-height: 1.75;
  position: relative;
}

.isg-list-styled li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--isg-gold);
  font-size: 0.8125rem;
  top: 0.75rem;
}

.isg-list-styled li strong {
  font-weight: 700;
  color: var(--isg-text-ink);
}

/* ================================================================
   11-B. 目次（Editorial Index Plate）
   ================================================================ */
.isg-toc {
  margin-block: clamp(2rem, 5vw, 3.25rem) 0;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.isg-toc__header {
  text-align: center;
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
  padding-bottom: clamp(1.25rem, 3vw, 1.75rem);
  border-bottom: 1px solid var(--isg-bg-warm-2);
  position: relative;
}

.isg-toc__header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 2px;
  background: var(--isg-gold);
}

.isg-toc__eyebrow {
  font-family: var(--isg-font-display);
  font-style: italic;
  font-size: clamp(0.75rem, 1.6vw, 0.875rem);
  letter-spacing: 0.18em;
  color: var(--isg-gold);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
}

.isg-toc__heading {
  font-family: var(--isg-font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--isg-text-ink);
  line-height: 1.35;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}

.isg-toc__lead {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.75rem, 1.6vw, 0.875rem);
  color: var(--isg-text-ink-m);
  line-height: 1.7;
  letter-spacing: 0.02em;
}

.isg-toc__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  counter-reset: isg-toc-counter;
}

.isg-toc__item {
  border-bottom: 1px solid var(--isg-bg-warm-2);
  background: transparent;
  transition: background-color var(--isg-transition);
}

.isg-toc__item:first-child {
  border-top: 1px solid var(--isg-bg-warm-2);
}

.isg-toc__item:hover {
  background-color: rgba(200, 153, 58, 0.04);
}

.isg-toc__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(0.875rem, 2.5vw, 1.5rem);
  padding: clamp(1rem, 2.5vw, 1.25rem) clamp(0.5rem, 2vw, 1rem);
  text-decoration: none;
  color: inherit;
  transition: transform var(--isg-transition), color var(--isg-transition);
}

.isg-toc__link:hover,
.isg-toc__link:focus-visible {
  text-decoration: none;
  outline: none;
}

.isg-toc__link:focus-visible {
  background-color: rgba(200, 153, 58, 0.08);
  box-shadow: inset 0 0 0 2px var(--isg-gold);
}

.isg-toc__num {
  font-family: var(--isg-font-display);
  font-style: italic;
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  color: var(--isg-gold);
  line-height: 1;
  font-weight: 400;
  min-width: 2.4em;
  text-align: left;
  letter-spacing: -0.02em;
  transition: color var(--isg-transition);
}

.isg-toc__body {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.isg-toc__chapter {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.625rem, 1.3vw, 0.6875rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--isg-text-ink-m);
  line-height: 1.4;
}

.isg-toc__title {
  font-family: var(--isg-font-serif);
  font-weight: 700;
  font-size: clamp(1rem, 2.4vw, 1.1875rem);
  color: var(--isg-text-ink);
  line-height: 1.45;
  letter-spacing: 0.02em;
}

.isg-toc__desc {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.78125rem, 1.7vw, 0.875rem);
  color: var(--isg-text-ink-2);
  line-height: 1.65;
  letter-spacing: 0.01em;
  font-weight: 300;
}

.isg-toc__arrow {
  font-family: var(--isg-font-sans);
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  color: var(--isg-gold);
  opacity: 0.55;
  transform: translateX(0);
  transition: transform var(--isg-transition), opacity var(--isg-transition);
  font-weight: 300;
  line-height: 1;
}

.isg-toc__link:hover .isg-toc__arrow,
.isg-toc__link:focus-visible .isg-toc__arrow {
  opacity: 1;
  transform: translateX(6px);
}

.isg-toc__link:hover .isg-toc__title,
.isg-toc__link:focus-visible .isg-toc__title {
  color: var(--isg-gold);
}

/* 11章（最終章）アクセント */
.isg-toc__item--accent {
  background: linear-gradient(
    90deg,
    rgba(200, 153, 58, 0.05) 0%,
    rgba(200, 153, 58, 0.02) 50%,
    transparent 100%
  );
}

.isg-toc__item--accent .isg-toc__title {
  color: var(--isg-text-ink);
}

/* タブレット以上：2カラム化 */
@media (min-width: 768px) {
  .isg-toc__list {
    grid-template-columns: 1fr 1fr;
    column-gap: clamp(1.5rem, 3vw, 2.25rem);
  }
  .isg-toc__item {
    border-bottom: 1px solid var(--isg-bg-warm-2);
  }
  /* 11章は2カラム時に1行を独占（センター揃え） */
  .isg-toc__item--accent {
    grid-column: 1 / -1;
    max-width: 540px;
    margin-inline: auto;
    border-top: 1px solid var(--isg-bg-warm-2);
    margin-top: 0.5rem;
  }
}

/* モバイル：矢印非表示でコンパクトに */
@media (max-width: 480px) {
  .isg-toc__arrow { display: none; }
  .isg-toc__link {
    grid-template-columns: auto 1fr;
    gap: 0.875rem;
    padding: 0.875rem 0.25rem;
  }
  .isg-toc__num { font-size: 1.5rem; min-width: 2em; }
}

/* ================================================================
   11-C. 戦略カードグリッド（Strategic Cards Grid）
   ================================================================ */
.isg-strategy-block {
  margin-block: clamp(2.5rem, 5vw, 3.5rem) clamp(1.5rem, 4vw, 2.25rem);
  max-width: var(--isg-container-max);
  margin-left: auto;
  margin-right: auto;
}

.isg-strategy-block__header {
  text-align: center;
  margin-bottom: clamp(1.5rem, 3.5vw, 2.25rem);
  padding-bottom: clamp(1.25rem, 3vw, 1.75rem);
  position: relative;
}

.isg-strategy-block__header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  height: 1.5px;
  background: var(--isg-gold);
}

.isg-strategy-block__eyebrow {
  font-family: var(--isg-font-display);
  font-style: italic;
  font-size: clamp(0.75rem, 1.5vw, 0.875rem);
  color: var(--isg-gold);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.isg-strategy-block__title {
  font-family: var(--isg-font-serif);
  font-weight: 700;
  font-size: clamp(1.25rem, 3.2vw, 1.625rem);
  color: var(--isg-text-ink);
  line-height: 1.45;
  letter-spacing: 0.03em;
  margin-bottom: 0.65rem;
}

.isg-strategy-block__title span {
  color: var(--isg-gold);
}

.isg-strategy-block__lead {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.8125rem, 1.7vw, 0.9375rem);
  color: var(--isg-text-ink-2);
  line-height: 1.85;
  max-width: 580px;
  margin-inline: auto;
}

.isg-strategy-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 2.5vw, 1.25rem);
}

@media (min-width: 768px) {
  .isg-strategy-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
}

.isg-strategy-card {
  position: relative;
  background: #faf7f2;
  border: 1px solid var(--isg-bg-warm-2);
  border-left: 3px solid var(--isg-gold);
  padding: clamp(1.5rem, 3.5vw, 1.875rem) clamp(1.25rem, 3vw, 1.75rem) clamp(1.25rem, 3vw, 1.625rem);
  transition: transform var(--isg-transition), box-shadow var(--isg-transition), border-color var(--isg-transition);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.isg-strategy-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(26, 20, 16, 0.08);
  border-left-color: var(--isg-gold-bright);
}

.isg-strategy-card__num {
  font-family: var(--isg-font-display);
  font-style: italic;
  font-size: clamp(1.625rem, 3.8vw, 2rem);
  color: var(--isg-gold);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 0.1rem;
}

.isg-strategy-card__tag {
  display: inline-block;
  font-family: var(--isg-font-sans);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--isg-gold);
  background: rgba(200, 153, 58, 0.1);
  padding: 0.25rem 0.625rem;
  border-radius: 2px;
  align-self: flex-start;
  line-height: 1;
}

.isg-strategy-card__title {
  font-family: var(--isg-font-serif);
  font-weight: 700;
  font-size: clamp(1.0625rem, 2.4vw, 1.1875rem);
  color: var(--isg-text-ink);
  line-height: 1.5;
  letter-spacing: 0.02em;
  margin: 0;
}

.isg-strategy-card__desc {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.8125rem, 1.7vw, 0.875rem);
  color: var(--isg-text-ink-2);
  line-height: 1.85;
  font-weight: 300;
  margin: 0;
}

.isg-strategy-block__note {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  font-family: var(--isg-font-sans);
  font-size: clamp(0.6875rem, 1.4vw, 0.75rem);
  color: var(--isg-text-ink-m);
  line-height: 1.75;
  text-align: center;
  padding: 0.875rem 1rem;
  background: rgba(200, 153, 58, 0.05);
  border-top: 1px solid var(--isg-bg-warm-2);
  border-bottom: 1px solid var(--isg-bg-warm-2);
}

.isg-strategy-block__note strong {
  color: var(--isg-text-ink-2);
  font-weight: 600;
}

/* ================================================================
   11-D. 著者ノート（改修4：誤解防止 disclaimer card）
   ================================================================ */
.isg-author-note {
  margin-block: clamp(2rem, 4.5vw, 2.75rem) 0;
  padding: clamp(1.5rem, 3.5vw, 2rem) clamp(1.25rem, 3vw, 1.75rem);
  background: #f5f0e6;
  border: 1px solid var(--isg-bg-warm-2);
  border-left: 3px solid var(--isg-gold);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

.isg-author-note__head {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 0.875rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(200, 153, 58, 0.25);
}

.isg-author-note__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--isg-gold);
  color: #faf7f2;
  font-size: 0.875rem;
  font-family: var(--isg-font-display);
  font-style: italic;
  line-height: 1;
  flex-shrink: 0;
}

.isg-author-note__label {
  font-family: var(--isg-font-display);
  font-style: italic;
  font-size: clamp(0.8125rem, 1.7vw, 0.9375rem);
  color: var(--isg-text-ink);
  letter-spacing: 0.08em;
  margin: 0;
  font-weight: 400;
}

.isg-author-note__body {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.8125rem, 1.7vw, 0.875rem);
  color: var(--isg-text-ink-2);
  line-height: 1.95;
  margin: 0 0 0.65rem;
  letter-spacing: 0.01em;
  font-weight: 300;
}

.isg-author-note__body:last-child {
  margin-bottom: 0;
}

.isg-author-note__body strong {
  color: var(--isg-text-ink);
  font-weight: 600;
}

.isg-author-note__body--strong {
  margin-top: 0.875rem;
  padding-top: 0.875rem;
  border-top: 1px dashed rgba(200, 153, 58, 0.35);
  color: var(--isg-text-ink);
  font-weight: 400;
}

/* ================================================================
   11-E. 専門家相談リマインダー（小型disclaimer）
   ================================================================ */
.isg-expert-reminder {
  display: block !important;
  margin-left: auto !important;
  margin-right: auto !important;
  margin-top: 2rem !important;
  margin-bottom: 2rem !important;
  max-width: 720px !important;
  width: auto !important;
  padding: 1.25rem 1.5rem !important;
  text-align: center !important; /* テキストを強制中央寄せ */
  background: rgba(200, 153, 58, 0.06) !important;
  border: 1px dashed rgba(200, 153, 58, 0.4) !important;
  border-radius: 4px !important;
  position: relative !important;
  float: none !important;        /* 万が一floatがかかっていた場合の解除 */
}

.isg-expert-reminder strong {
  color: var(--isg-text-ink);
  font-weight: 600;
}

.isg-expert-reminder strong{
  color:var(--isg-text-ink);

  font-weight:600;

  display:inline;

  white-space:normal;

  word-break:keep-all;
}

.isg-expert-reminder-line{

  display: block; /* ブロック要素にして中央寄せを確実に適用 */

  margin-top: .35rem;

}


/* ================================================================
   12. プルクォート
   ================================================================ */
.isg-pull-quote {
  border-left: 5px solid var(--isg-gold) !important;
  padding: 1.5rem 2rem !important;
  margin-block: 2.5rem !important;
  background: var(--isg-bg-warm) !important;
  font-family: var(--isg-font-serif) !important;
  font-size: clamp(1rem, 2.5vw, 1.25rem) !important;
  font-weight: 400 !important;
  line-height: 1.75 !important;
  color: var(--isg-text-ink) !important;
  font-style: italic !important;
  border-right: none !important;
  border-radius: 0 !important;
  box-shadow: none !important;
}

.isg-pull-quote strong {
  font-style: normal;
  font-weight: 700;
  color: var(--isg-text-ink);
}


/* ================================================================
   13. コールアウトボックス
   ================================================================ */
.isg-callout {
  padding: 1.625rem 1.875rem;
  margin-block: 2rem;
  position: relative;
}

.isg-callout-label {
  font-family: var(--isg-font-sans);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.625rem;
  display: block;
}

.isg-callout p {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.8125rem, 1.8vw, 0.875rem);
  line-height: 1.8;
  margin-bottom: 0.5rem;
  color: inherit;
}

.isg-callout p:last-child { margin-bottom: 0; }

.isg-callout strong { font-weight: 700; }

/* Warning */
.isg-callout--warning {
  background: #fff8f8;
  border: 1px solid #f5c6c6;
  border-left: 5px solid var(--isg-red);
}
.isg-callout--warning .isg-callout-label { color: var(--isg-red); }
.isg-callout--warning p { color: var(--isg-text-ink-2); }

/* Success */
.isg-callout--success {
  background: #f4faf8;
  border: 1px solid #aaddd5;
  border-left: 5px solid var(--isg-teal);
}
.isg-callout--success .isg-callout-label { color: var(--isg-teal); }
.isg-callout--success p { color: var(--isg-text-ink-2); }

/* Info */
.isg-callout--info {
  background: #f4f7fc;
  border: 1px solid #b8ccdf;
  border-left: 5px solid var(--isg-blue-mid);
}
.isg-callout--info .isg-callout-label { color: var(--isg-blue-mid); }
.isg-callout--info p { color: var(--isg-text-ink-2); }

/* Gold */
.isg-callout--gold {
  background: #fdf8ee;
  border: 1px solid #e8d598;
  border-left: 5px solid var(--isg-gold);
}
.isg-callout--gold .isg-callout-label { color: #a07020; }
.isg-callout--gold p { color: var(--isg-text-ink-2); }


/* ================================================================
   14. フローダイアグラム
   ================================================================ */
.isg-flow {
  background: var(--isg-bg-warm);
  border: 1px solid var(--isg-border-ink);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  margin-block: 2rem;
}

.isg-flow__title {
  font-family: var(--isg-font-serif);
  font-size: clamp(0.9375rem, 2.2vw, 1.125rem);
  font-weight: 700;
  color: var(--isg-text-ink);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--isg-border-ink);
}

.isg-flow__row {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin-bottom: 0.625rem;
}

.isg-flow__node {
  background: var(--isg-bg);
  color: var(--isg-text);
  padding: 0.875rem 1.125rem;
  font-family: var(--isg-font-sans);
  font-size: clamp(0.75rem, 1.7vw, 0.875rem);
  font-weight: 500;
  min-width: clamp(140px, 22vw, 200px);
  max-width: clamp(140px, 22vw, 200px);
  display: flex;
  align-items: center;
  line-height: 1.45;
  flex-shrink: 0;
}

.isg-flow__node--gold { background: var(--isg-gold); color: var(--isg-bg); }
.isg-flow__node--teal { background: var(--isg-teal); }
.isg-flow__node--red  { background: var(--isg-red); }
.isg-flow__node--blue { background: var(--isg-blue); }
.isg-flow__node--muted{ background: #6b5f57; }

.isg-flow__arrow {
  display: flex;
  align-items: center;
  padding-inline: 0.5rem;
  font-size: 1.125rem;
  color: var(--isg-gold);
  font-weight: 700;
  flex-shrink: 0;
}

.isg-flow__result {
  flex: 1;
  background: white;
  border: 1px solid var(--isg-border-ink);
  border-left: none;
  padding: 0.875rem 1.125rem;
  font-family: var(--isg-font-sans);
  font-size: clamp(0.75rem, 1.7vw, 0.8125rem);
  color: var(--isg-text-ink-2);
  line-height: 1.65;
  display: flex;
  align-items: center;
}

.isg-flow__result strong { color: var(--isg-text-ink); font-weight: 700; }


/* ================================================================
   15. タイムライン
   ================================================================ */
.isg-timeline {
  margin-block: 2rem;
}

.isg-timeline__item {
  display: flex;
  gap: 0;
  margin-bottom: 0;
}

.isg-timeline__period {
  background: var(--isg-bg);
  color: var(--isg-text);
  min-width: clamp(120px, 18vw, 160px);
  max-width: clamp(120px, 18vw, 160px);
  padding: 1.25rem 1rem;
  font-family: var(--isg-font-serif);
  font-size: clamp(0.8125rem, 1.8vw, 0.9375rem);
  font-weight: 600;
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.35;
  flex-shrink: 0;
}

.isg-timeline__period small {
  font-family: var(--isg-font-sans);
  font-weight: 300;
  font-size: 0.6875rem;
  opacity: 0.6;
  margin-bottom: 0.25rem;
  letter-spacing: 0.05em;
  display: block;
}

.isg-timeline__connector {
  height: 2px;
  background: var(--isg-border-ink);
  margin-left: 0;
  width: 100%;
}

.isg-timeline__content {
  flex: 1;
  background: var(--isg-bg-warm);
  border: 1px solid var(--isg-border-ink);
  border-left: none;
  padding: 1.25rem 1.5rem;
}

.isg-timeline__content h4 {
  font-family: var(--isg-font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--isg-gold) !important;
  margin-bottom: 0.625rem;
  margin-top: 0;
}

.isg-timeline__content ul {
  list-style: none;
  padding: 0;
}

.isg-timeline__content ul li {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.75rem, 1.7vw, 0.8125rem);
  color: var(--isg-text-ink-2);
  padding: 0.2rem 0 0.2rem 1rem;
  line-height: 1.65;
  position: relative;
}

.isg-timeline__content ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--isg-gold);
  font-size: 0.6875rem;
  top: 0.25rem;
}


/* ================================================================
   16. 比較カード
   ================================================================ */
.isg-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  margin-block: 2rem;
}

.isg-compare-grid--3col {
  grid-template-columns: repeat(3, 1fr);
}

.isg-compare-card {
  background: var(--isg-bg-warm);
  border: 1px solid var(--isg-border-ink);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  transition: transform var(--isg-transition);
}

.isg-compare-card:hover { transform: translateY(-2px); }

/* 境界ボーダー上部 */
.isg-compare-card--border-gold { border-top: 4px solid var(--isg-gold); }
.isg-compare-card--border-teal { border-top: 4px solid var(--isg-teal); }
.isg-compare-card--border-red  { border-top: 4px solid var(--isg-red); }

/* Featured (dark) */
.isg-compare-card--featured {
  background: var(--isg-bg);
  color: var(--isg-text);
  border-color: var(--isg-bg);
}

.isg-compare-card__title {
  font-family: var(--isg-font-serif);
  font-size: clamp(1rem, 2.4vw, 1.125rem);
  font-weight: 700;
  color: var(--isg-text-ink);
  margin-bottom: 1.125rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--isg-border-ink);
  line-height: 1.4;
}

.isg-compare-card--featured .isg-compare-card__title {
  color: var(--isg-gold);
  border-color: rgba(200, 153, 58, 0.28);
}

.isg-compare-card ul {
  list-style: none;
  padding: 0;
}

.isg-compare-card ul li {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.75rem, 1.7vw, 0.8125rem);
  padding: 0.375rem 0 0.375rem 1.25rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  line-height: 1.55;
  position: relative;
  color: var(--isg-text-ink-2);
}

.isg-compare-card--featured ul li {
  border-color: rgba(255, 255, 255, 0.05);
  color: rgba(250, 247, 242, 0.78);
}

.isg-compare-card ul li::before {
  content: '◆';
  position: absolute;
  left: 0;
  font-size: 0.5rem;
  top: 0.6rem;
}

.isg-compare-card ul li.pro::before  { color: var(--isg-teal); }
.isg-compare-card ul li.con::before  { color: var(--isg-red); }
.isg-compare-card ul li.neutral::before { color: var(--isg-gold); }

.isg-compare-card--featured ul li.pro::before { color: var(--isg-teal-light); }
.isg-compare-card--featured ul li.con::before { color: #ff8080; }


/* ================================================================
   17. 統計カード
   ================================================================ */
.isg-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin-block: 2rem;
}

.isg-stat-card {
  color: var(--isg-text);
  padding: clamp(1.25rem, 3vw, 1.75rem) 1.25rem;
  text-align: center;
}

.isg-stat-card--dark  { background: var(--isg-bg); }
.isg-stat-card--gold  { background: var(--isg-gold); color: var(--isg-bg); }
.isg-stat-card--blue  { background: var(--isg-blue); }
.isg-stat-card--teal  { background: var(--isg-teal); }

.isg-stat-number {
  font-family: var(--isg-font-display);
  font-size: clamp(2.5rem, 6vw, 3.25rem);
  line-height: 1;
  margin-bottom: 0.5rem;
  font-style: italic;
}

.isg-stat-unit {
  font-size: 0.45em;
  vertical-align: middle;
}

.isg-stat-label {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.625rem, 1.3vw, 0.6875rem);
  opacity: 0.75;
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1.55;
}

.isg-stat-card--gold .isg-stat-label { opacity: 0.65; }


/* ================================================================
   18. バッジ
   ================================================================ */
.isg-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-family: var(--isg-font-sans);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.isg-badge--gold  { background: #fdf0d2; color: #a07020; }
.isg-badge--green { background: #d4f4ed; color: var(--isg-teal); }
.isg-badge--gray  { background: #e8e5e0; color: var(--isg-text-ink-m); }
.isg-badge--red   { background: #fde8e8; color: var(--isg-red); }


/* ================================================================
   19. セクションラベル・区切り線
   ================================================================ */
.isg-section-label {
  display: inline-block;
  background: var(--isg-gold);
  color: var(--isg-bg);
  font-family: var(--isg-font-sans);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  padding: 0.25rem 0.75rem;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.isg-rule {
  border: none;
  border-top: 1px solid var(--isg-border-ink);
  margin-block: 3rem;
}


/* ================================================================
   20. MID-CTA セクション
   ================================================================ */
.isg-cta-mid {
  background: var(--isg-bg-2);
  color: var(--isg-text);
  padding-block: clamp(3.5rem, 7vw, 6rem);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.isg-cta-mid::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 59px,
      rgba(200, 153, 58, 0.04) 59px,
      rgba(200, 153, 58, 0.04) 60px
    );
  pointer-events: none;
}

.isg-cta-mid__inner {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.isg-cta-mid__eyebrow {
  font-family: var(--isg-font-sans);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--isg-gold);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.isg-cta-mid__title {
  font-family: var(--isg-font-serif);
  font-size: clamp(1.375rem, 3.8vw, 2rem);
  font-weight: 700;
  color: var(--isg-text);
  line-height: 1.35;
  margin-bottom: 1.25rem;
}

.isg-cta-mid__title span {
  color: var(--isg-gold);
}

.isg-cta-mid__body {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.875rem, 2vw, 0.9375rem);
  color: rgba(250, 247, 242, 0.65);
  line-height: 1.85;
  margin-bottom: 2rem;
}

.isg-cta-mid__sub {
  font-family: var(--isg-font-sans);
  font-size: 0.75rem;
  color: rgba(250, 247, 242, 0.38);
  letter-spacing: 0.06em;
  margin-top: 0.75rem;
}


/* ================================================================
   21. FINAL CTA — Editorial Closing Spread
   ================================================================ */
.isg-cta-final {
  background: var(--isg-bg);
  color: var(--isg-text);
  padding-block: clamp(5rem, 11vw, 9rem);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.isg-cta-final__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 0%,  rgba(200, 153, 58, 0.12) 0%, transparent 62%),
    radial-gradient(ellipse 90% 45% at 50% 100%, rgba(200, 153, 58, 0.06) 0%, transparent 70%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 59px,
      rgba(200, 153, 58, 0.05) 59px,
      rgba(200, 153, 58, 0.05) 60px
    );
  pointer-events: none;
}

.isg-cta-final__grain {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(rgba(200, 153, 58, 0.05) 1px, transparent 1px);
  background-size: 3px 3px;
  opacity: 0.7;
  mix-blend-mode: screen;
}

.isg-cta-final__inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

/* ── ファイナルプレート（No.装飾） ── */
.isg-cta-final__plate {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.875rem;
  margin: 0 auto 1.25rem;
  max-width: 280px;
}

.isg-cta-final__plate-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(200, 153, 58, 0.5), transparent);
}

.isg-cta-final__plate-mark {
  font-family: var(--isg-font-display);
  font-style: italic;
  font-size: 0.875rem;
  letter-spacing: 0.18em;
  color: var(--isg-gold);
  text-transform: uppercase;
}

.isg-cta-final__eyebrow {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.6875rem, 1.4vw, 0.8125rem);
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--isg-gold);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.isg-cta-final__title {
  font-family: var(--isg-font-serif);
  font-size: clamp(1.625rem, 4.5vw, 2.625rem);
  font-weight: 700;
  color: var(--isg-text);
  line-height: 1.45;
  letter-spacing: 0.03em;
  margin-bottom: 1.25rem;
}

.isg-cta-final__title span {
  color: var(--isg-gold);
  display: inline-block;
  margin-top: 0.4rem;
}

/* ── 装飾ディバイダー ── */
.isg-cta-final__divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin: 0 auto 1.75rem;
  max-width: 260px;
}

.isg-cta-final__divider span {
  flex: 1;
  height: 1px;
  background: rgba(200, 153, 58, 0.35);
}

.isg-cta-final__divider em {
  font-family: var(--isg-font-display);
  font-style: italic;
  font-size: 0.6875rem;
  letter-spacing: 0.25em;
  color: var(--isg-gold);
  text-transform: uppercase;
}

.isg-cta-final__body {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.875rem, 2vw, 0.9375rem);
  color: rgba(250, 247, 242, 0.78);
  line-height: 2;
  margin-bottom: 2.25rem;
  font-weight: 300;
}

.isg-cta-final__body strong {
  color: var(--isg-gold-bright);
  font-weight: 500;
}

.isg-cta-final__body em {
  display: inline-block;
  margin-top: 0.5rem;
  font-family: var(--isg-font-serif);
  font-style: italic;
  font-size: 0.875rem;
  color: rgba(250, 247, 242, 0.55);
}

/* ── ベネフィット2カラム ── */
.isg-cta-final__benefits {
  list-style: none;
  padding: 0;
  margin: 0 auto 2.5rem;
  max-width: 620px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.875rem;
  text-align: left;
}

@media (min-width: 640px) {
  .isg-cta-final__benefits {
    grid-template-columns: 1fr 1fr;
  }
  .isg-cta-final__benefits li:nth-child(5) {
    grid-column: 1 / -1;
    max-width: 320px;
    margin-inline: auto;
  }
}

.isg-cta-final__benefits li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  background: rgba(200, 153, 58, 0.05);
  border: 1px solid rgba(200, 153, 58, 0.18);
  border-radius: 3px;
  transition: background var(--isg-transition), border-color var(--isg-transition);
}

.isg-cta-final__benefits li:hover {
  background: rgba(200, 153, 58, 0.08);
  border-color: rgba(200, 153, 58, 0.35);
}

.isg-cta-final__benefits li::before {
  content: none;
}

.isg-cta-final__check {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--isg-gold);
  color: var(--isg-bg);
  font-size: 0.75rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.1rem;
}

.isg-cta-final__bn-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
  flex: 1;
}

.isg-cta-final__bn-title {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.8125rem, 1.7vw, 0.875rem);
  font-weight: 600;
  color: var(--isg-text);
  line-height: 1.5;
  letter-spacing: 0.02em;
}

.isg-cta-final__bn-sub {
  font-family: var(--isg-font-sans);
  font-size: clamp(0.6875rem, 1.4vw, 0.75rem);
  color: rgba(250, 247, 242, 0.55);
  line-height: 1.6;
  font-weight: 300;
}

/* ── CTAボタン + メタ情報 ── */
.isg-cta-final__cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.isg-cta-final__btn {
  font-size: clamp(0.9375rem, 2.4vw, 1.125rem);
  padding: 1.25rem clamp(2.5rem, 6vw, 4.5rem);
}

.isg-cta-final__sub {
  font-family: var(--isg-font-sans);
  font-size: 0.75rem;
  color: rgba(250, 247, 242, 0.42);
  letter-spacing: 0.08em;
  margin-top: 0.25rem;
}

/* メタチップ（完全無料・メール登録のみ・1分で完了） */
.isg-cta-final__meta {
  list-style: none;
  padding: 0;
  margin: 0.5rem auto 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 1rem;
  max-width: 460px;
}

.isg-cta-final__meta li {
  font-family: var(--isg-font-sans);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: rgba(250, 247, 242, 0.62);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
}

.isg-cta-final__meta li span {
  font-size: 0.45rem;
  color: var(--isg-gold);
  line-height: 1;
}

/* Disclaimer（改修4対応） */
.isg-cta-final__disclaimer {
  margin: 1.75rem auto 0;
  max-width: 540px;
  font-family: var(--isg-font-sans);
  font-size: clamp(0.6875rem, 1.4vw, 0.75rem);
  color: rgba(250, 247, 242, 0.5);
  line-height: 1.85;
  letter-spacing: 0.02em;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(200, 153, 58, 0.18);
  text-align: center;
}

.isg-cta-final__disclaimer strong {
  color: rgba(250, 247, 242, 0.78);
  font-weight: 600;
}



/* ================================================================
   22. レスポンシブ — タブレット（768px〜）
   ================================================================ */
@media (min-width: 768px) {

  .isg-cover {
    padding-left: clamp(4rem, 9vw, 7rem);
  }

  .isg-flow__node {
    font-size: 0.875rem;
  }

  .isg-compare-grid--3col {
    grid-template-columns: repeat(3, 1fr);
  }
}


/* ================================================================
   23. レスポンシブ — モバイル（〜767px）
   ================================================================ */
@media (max-width: 767px) {

  .isg-cover {
    padding: 5.5rem 1.5rem 6.5rem;
    align-items: flex-start;
  }

  .isg-cover__scroll {
    display: none;
  }

  .isg-cover__footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    left: 1.5rem;
    right: 1.5rem;
  }

  .isg-chapter-header {
    padding: 3.5rem 1.5rem 2.5rem;
  }

  .isg-chapter-header__number {
    font-size: 5rem;
    right: 1rem;
    top: 0.5rem;
  }

  /* 比較グリッド: モバイルは1カラム */
  .isg-compare-grid,
  .isg-compare-grid--3col {
    grid-template-columns: 1fr;
  }

  /* 統計グリッド: モバイルは1カラム */
  .isg-stat-grid {
    grid-template-columns: 1fr;
  }

  /* フローダイアグラム: モバイル対応 */
  .isg-flow__row {
    flex-direction: column;
  }

  .isg-flow__node {
    max-width: 100%;
    min-width: unset;
  }

  .isg-flow__arrow {
    transform: rotate(90deg);
    width: 2rem;
    padding-block: 0.25rem;
    justify-content: center;
  }

  .isg-flow__result {
    border-left: 1px solid var(--isg-border-ink);
  }

  /* タイムライン: モバイル対応 */
  .isg-timeline__item {
    flex-direction: column;
  }

  .isg-timeline__period {
    max-width: 100%;
    min-width: unset;
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
  }

  .isg-timeline__period small {
    margin-bottom: 0;
  }

  .isg-timeline__content {
    border-left: 1px solid var(--isg-border-ink);
  }

  /* テーブル: モバイル対応 */
  .isg-table thead {
    display: none;
  }

  .isg-table tbody tr {
    display: block;
    border-bottom: 2px solid var(--isg-bg-warm-2);
    padding: 0.75rem 0;
  }

  .isg-table tbody td {
    display: block;
    padding: 0.25rem 0.75rem;
    border-bottom: none;
    white-space: normal;
  }

  .isg-table tbody td:first-child {
    white-space: normal;
    color: var(--isg-gold) !important;
    font-size: 0.75rem;
    letter-spacing: 0.04em;
  }

  .isg-table-row--special td:first-child {
    color: var(--isg-text-ink) !important;
  }

  .isg-intro-panel {
    padding: 1.5rem 1.25rem 1.5rem 2rem;
  }

  .isg-intro-panel::before {
    font-size: 3.5rem;
  }

  .isg-pull-quote {
    font-size: 1rem !important;
  }

  .isg-cta-btn {
    width: 100%;
    max-width: 360px;
  }

  .isg-cta-mid__title {
    font-size: 1.375rem;
  }
}


/* ================================================================
   24. デスクトップ（1024px〜）
   ================================================================ */
@media (min-width: 1024px) {

  .isg-chapter-header {
    padding-left: clamp(5rem, 8vw, 7rem);
  }

  .isg-chapter-header__inner {
    max-width: 700px;
  }
}


/* ================================================================
   25. ワイドデスクトップ（1280px〜）
   ================================================================ */
@media (min-width: 1280px) {

  .isg-cover__inner {
    max-width: 860px;
  }
}


/* ================================================================
   26. アクセシビリティ — reduced-motion
   ================================================================ */
@media (prefers-reduced-motion: reduce) {

  .isg-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .isg-cover__scroll-line {
    animation: none;
    opacity: 0.5;
  }

  .isg-cta-btn::before {
    display: none;
  }
}

/* ================================================================
   KEY VISUAL（画像配置）— 追加ブロック
   ================================================================ */

/* 章扉直後・本文冒頭に置く16:9のキービジュアル写真 */
.isg-keyvisual {
  position: relative;
  width: 100%;
  max-width: var(--isg-container-max);
  margin: 0 auto clamp(2rem, 5vw, 3.5rem);
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 4px;
  box-shadow:
    0 30px 60px -25px rgba(26, 20, 16, 0.35),
    0 8px 20px -10px rgba(26, 20, 16, 0.2);
  background-color: #1a1410;
}

.isg-keyvisual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 1.4s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

.isg-keyvisual:hover img {
  transform: scale(1.035);
}

.isg-keyvisual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(26, 20, 16, 0) 60%,
    rgba(26, 20, 16, 0.22) 100%
  );
  pointer-events: none;
}

/* 図解専用：明るい紙背景に馴染ませる */
.isg-figure {
  position: relative;
  width: 100%;
  max-width: var(--isg-container-max);
  margin: clamp(2rem, 5vw, 3rem) auto;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 4px;
  border: 1px solid rgba(200, 153, 58, 0.18);
  background-color: #ffffff;
  box-shadow: 0 18px 40px -22px rgba(26, 20, 16, 0.18);
}

.isg-figure img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
  background-color: #ffffff;
}

.isg-figure__caption {
  display: block;
  text-align: center;
  font-family: var(--isg-font-sans);
  font-size: clamp(0.6875rem, 1.2vw, 0.8125rem);
  letter-spacing: 0.12em;
  color: rgba(26, 20, 16, 0.55);
  margin-top: 0.9rem;
  font-weight: 500;
}

/* COVER背景に写真を載せるためのオーバーライド */
.isg-cover__bg-img.isg-cover__bg-img--photo {
  background-image:
    linear-gradient(
      180deg,
      rgba(26, 20, 16, 0.55) 0%,
      rgba(26, 20, 16, 0.72) 60%,
      rgba(26, 20, 16, 0.88) 100%
    ),
    url('https://www.turning-point.today/wp-content/uploads/2026/06/income_strategy_guide_1.webp');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  filter: saturate(0.92);
}

/* モバイル微調整 */
@media (max-width: 640px) {
  .isg-keyvisual,
  .isg-figure {
    border-radius: 3px;
    margin-inline: clamp(0rem, 2vw, 1rem);
  }
}