/* ===========================================================
   Liaison — About Us
   =========================================================== */

.about { position: relative; overflow: hidden; }

.about-bg-mark {
  position: absolute;
  pointer-events: none;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  color: rgba(168,24,72,0.05);
  white-space: nowrap;
  line-height: 0.85;
  font-size: clamp(220px, 28vw, 420px);
  top: -28px; right: -32px;
  letter-spacing: -0.04em;
}

/* ---------- Staggered layout ---------- */
.about-a-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  column-gap: 96px;
  row-gap: 0;
  align-items: start;
  position: relative;
}
.about-a-head { position: sticky; top: 96px; padding-top: 8px; }
.about-a-index {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 24px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.about-a-index::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent);
}
.about-a-en {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(54px, 6.2vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.about-a-en .it {
  font-style: italic;
  font-weight: 300;
  color: var(--accent-ink);
}
.about-a-rule {
  margin-top: 32px;
  width: 56px; height: 1px;
  background: var(--ink);
}

.about-a-lead {
  grid-column: 2;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(26px, 2.6vw, 38px);
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--ink);
  margin-bottom: 64px;
  padding-top: 6px;
}
.about-a-lead em {
  font-style: normal;
}
.about-a-body {
  grid-column: 2;
  margin-top: 28px;
  padding-left: 56px;
  border-left: 1px solid var(--line);
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.about-a-body .about-text {
  font-family: var(--jpsans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-2);
}
.about-cta {
  background: var(--ink);
  color: var(--paper);
}
.about-cta:hover {
  background: var(--accent-ink);
  color: var(--paper);
}

/* ---------- Sub-chapters within About section ---------- */
.about-chapter {
  margin-top: 120px;
  padding-top: 80px;
  border-top: 1px solid var(--line);
  position: relative;
}
.about-chapter-head {
  margin-bottom: 56px;
}
.about-chapter-head .chapter-no {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--ink-3);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.about-chapter-head .chapter-no::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent);
}
.about-chapter-head .chapter-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.2;
  letter-spacing: 0.005em;
  color: var(--ink);
  max-width: 800px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .about-a-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-a-head { position: static; }
  .about-a-lead, .about-a-body { grid-column: auto; padding-left: 0; border-left: 0; max-width: 100%; margin-bottom: 0; }
  .lg-only { display: none; }
}