.section-why-adapt__heading {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-3);
}
.section-why-adapt__lead {
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
  margin-bottom: var(--space-8);
  max-width: 680px;
}
.section-why-adapt__pillars {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: var(--space-8);
}

/* pillar-card (Pillar 01–03) */
.pillar-card {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-4);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
}
.pillar-card:last-of-type {
  border-bottom: 1px solid var(--color-border);
}
.pillar-card__number {
  font-family: var(--font-en);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-accent);
  padding-top: 6px;
}
.pillar-card__heading {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-2);
}
.pillar-card__body {
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
  max-width: 60ch;
}

/* ── Pillar Highlight (Pillar 04: 還元率) ─────────── */
.pillar-highlight {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1.4fr;
  gap: var(--space-6);
  align-items: center;
  padding: var(--space-8);
  background: linear-gradient(135deg, var(--color-accent-light) 0%, rgba(237, 233, 255, 0.4) 100%);
  border: 1px solid rgba(107, 92, 231, 0.18);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.pillar-highlight::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(107, 92, 231, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.pillar-highlight__left {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.pillar-highlight__number {
  font-family: var(--font-en);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}
.pillar-highlight__label {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-medium);
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  line-height: 1.3;
}
.pillar-highlight__center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.pillar-highlight__figure {
  font-family: var(--font-en);
  font-size: 7.5rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.06em;
  line-height: 1;
  color: var(--color-text-primary);
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 80%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.pillar-highlight__unit {
  font-size: 4rem;
  font-weight: var(--font-weight-medium);
  vertical-align: top;
  margin-left: 0.1em;
}
.pillar-highlight__caption {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
  letter-spacing: 0.08em;
}
.pillar-highlight__right {
  position: relative;
  z-index: 1;
}
.pillar-highlight__body {
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
  font-size: var(--text-base);
}

@media (max-width: 768px) {
  .pillar-card { grid-template-columns: 48px 1fr; }
  .pillar-highlight {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding: var(--space-6);
  }
  .pillar-highlight__figure { font-size: 5rem; }
  .pillar-highlight__unit { font-size: 2.5rem; }
}