.about-page {
  padding: 5rem 0 6rem;
}

.about-hero {
  padding-top: calc(5rem + 4rem); /* ヘッダー高さ + セクション余白 */
}

.about-card {
  background: #fff;
  border-radius: 1.5rem;
  box-shadow: var(--shadow-sm);
  padding: clamp(2.5rem, 4vw, 4rem);
  border: 1px solid var(--color-border);
  display: grid;
  gap: 2.5rem;
}

.about-card h2,
.about-card h3 {
  color: var(--color-navy);
  margin-top: 0;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.about-card h2 {
  margin-bottom: 1.25rem;
  font-weight: 700;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.about-card h3 {
  margin-bottom: 1rem;
  font-weight: 600;
  padding-left: 0.75rem;
  border-left: 3px solid var(--color-primary);
}

.about-card section {
  display: grid;
  gap: 1rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #e5e7eb;
}

.about-card section:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.about-card p {
  margin: 0;
  color: #4b5563;
  line-height: 1.75;
}

.about-card strong {
  color: var(--color-navy);
}

.about-card ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
  color: #4b5563;
  line-height: 1.7;
}

.about-card li {
  padding-left: 1.75rem;
  position: relative;
}

.about-card li::before {
  content: '•';
  position: absolute;
  left: 0.5rem;
  top: 0.1em;
  color: #4b5563;
  font-weight: bold;
  font-size: 1.2em;
  line-height: 1;
}

.about-card li span {
  color: var(--color-navy);
  font-weight: 600;
}

.about-card__closing {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  margin-top: 1rem;
}

.about-card__signature {
  margin: 1.75rem 0 0;
  font-weight: 700;
  color: var(--color-navy);
}

/* Utility classes for text emphasis */
.text-bold {
  font-weight: 600;
  color: #374151;
}