.page-about {
  background: var(--paper);
  color: var(--ink-deep);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: rgba(5, 20, 15, 0.6);
  margin-bottom: clamp(16px, 3vw, 30px);
}

.page-about .breadcrumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(5, 20, 15, 0.32);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan-deep);
  border-color: var(--cyan-deep);
}

/* ---------- hero ---------- */
.page-about .ab-hero {
  padding: clamp(22px, 4vw, 38px) 0 clamp(38px, 6vw, 76px);
  border-bottom: 2px solid var(--ink-deep);
}

.page-about .ab-hero-grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

.page-about .ab-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 6.6vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0.35em 0 0.5em;
}

.page-about .ab-lead {
  font-size: clamp(1rem, 1.8vw, 1.12rem);
  line-height: 1.85;
  color: rgba(5, 20, 15, 0.82);
  margin: 0;
  max-width: 44em;
}

.page-about .ab-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
}

.page-about .ab-index a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--ink-deep);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 2px solid var(--amber);
}

.page-about .ab-index a:hover,
.page-about .ab-index a:focus-visible {
  color: var(--cyan-deep);
  border-color: var(--cyan-deep);
}

.page-about .figure {
  margin: 0;
  border: 2px solid var(--ink-deep);
  box-shadow: var(--shadow-ghost);
  background: var(--paper-dim);
}

.page-about .figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .ab-hero-figure img {
  aspect-ratio: 16 / 9;
}

.page-about .figure-caption {
  display: block;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: rgba(5, 20, 15, 0.72);
  border-top: 1px solid rgba(5, 20, 15, 0.28);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--ink-deep);
  border: 2px solid var(--ink-deep);
  margin: clamp(24px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-stat {
  background: var(--paper);
  padding: 14px 16px;
}

.page-about .ab-stat .stat-num {
  display: block;
  font-size: clamp(1.55rem, 4vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ink-deep);
}

.page-about .ab-stat-label {
  display: block;
  margin-top: 7px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: rgba(5, 20, 15, 0.66);
}

/* ---------- chapters ---------- */
.page-about .ab-chapter {
  padding: clamp(38px, 7vw, 88px) 0;
  border-bottom: 1px solid rgba(5, 20, 15, 0.24);
}

.page-about .ab-chapter--last {
  border-bottom: 0;
}

.page-about .ab-chapter-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 3vw, 32px);
  align-items: start;
  margin-bottom: clamp(20px, 3.4vw, 38px);
}

.page-about .ab-num {
  font-weight: 700;
  font-size: clamp(2.6rem, 7vw, 4.3rem);
  line-height: 0.85;
  letter-spacing: -0.02em;
  color: var(--ink-deep);
}

.page-about .ab-num::after {
  content: "";
  display: block;
  width: 54px;
  height: 8px;
  margin-top: 12px;
  background: var(--amber);
}

.page-about .ab-chapter h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  line-height: 1.22;
  margin: 0.35em 0 0;
}

.page-about .ab-chapter .eyebrow {
  color: var(--cyan-deep);
  border-color: var(--cyan-deep);
}

.page-about .ab-chapter-body {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.page-about .ab-prose p {
  margin: 0 0 1.15em;
  font-size: clamp(0.98rem, 1.6vw, 1.06rem);
  line-height: 1.85;
  color: rgba(5, 20, 15, 0.86);
  max-width: 44em;
}

.page-about .ab-prose p:last-child {
  margin-bottom: 0;
}

.page-about .ab-side {
  border: 1px solid rgba(5, 20, 15, 0.34);
  border-left: 4px solid var(--cyan-deep);
  padding: 14px 16px;
  font-size: 0.88rem;
  line-height: 1.78;
  color: rgba(5, 20, 15, 0.78);
  align-self: start;
}

.page-about .ab-side p {
  margin: 0;
}

.page-about .ab-side-title {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--ink-deep);
  margin-bottom: 8px;
}

/* ---------- team lines ---------- */
.page-about .ab-lines {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  border-top: 2px solid var(--ink-deep);
}

.page-about .ab-lines li {
  padding: 16px 0;
  border-bottom: 1px solid rgba(5, 20, 15, 0.24);
}

.page-about .ab-lines h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  margin: 0 0 6px;
  color: var(--ink-deep);
}

.page-about .ab-lines p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: rgba(5, 20, 15, 0.78);
}

/* ---------- expand ---------- */
.page-about .ab-inline-expand {
  border: 1px solid rgba(5, 20, 15, 0.34);
  background: rgba(217, 205, 182, 0.4);
}

.page-about .ab-inline-expand .expand-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 14px 16px;
  background: none;
  border: 0;
  color: var(--ink-deep);
  font: inherit;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.page-about .ab-inline-expand .expand-trigger:hover,
.page-about .ab-inline-expand .expand-trigger:focus-visible {
  background: rgba(23, 185, 154, 0.12);
}

.page-about .ab-inline-expand .expand-panel {
  padding: 0 16px 16px;
  border-left: 3px solid var(--cyan-deep);
}

.page-about .ab-inline-expand .expand-panel p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(5, 20, 15, 0.8);
}

/* ---------- flow steps ---------- */
.page-about .ab-media-row {
  display: grid;
  gap: clamp(20px, 3.4vw, 34px);
  align-items: start;
}

.page-about .ab-flow {
  border-top: 2px solid var(--ink-deep);
}

.page-about .ab-step {
  border-bottom: 1px solid rgba(5, 20, 15, 0.24);
}

.page-about .ab-step-trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  width: 100%;
  padding: 15px 6px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .ab-step-trigger:hover,
.page-about .ab-step-trigger:focus-visible {
  background: rgba(23, 185, 154, 0.1);
}

.page-about .ab-step-num {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--cyan-deep);
}

.page-about .ab-step-text strong {
  display: block;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.02rem;
  color: var(--ink-deep);
}

.page-about .ab-step-text em {
  display: block;
  margin-top: 4px;
  font-style: normal;
  font-size: 0.82rem;
  line-height: 1.6;
  color: rgba(5, 20, 15, 0.62);
}

.page-about .ab-step .expand-panel {
  padding: 0 6px 18px 40px;
}

.page-about .ab-step .expand-panel p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.82;
  color: rgba(5, 20, 15, 0.8);
}

/* ---------- inverted block ---------- */
.page-about .ab-invert {
  background: var(--ink-deep);
  color: var(--white);
  padding: clamp(42px, 7vw, 92px) 0;
  border-top: 2px solid var(--ink-deep);
  border-bottom: 2px solid var(--ink-deep);
}

.page-about .ab-invert .ab-num {
  color: var(--white);
}

.page-about .ab-invert h2 {
  color: var(--white);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  line-height: 1.22;
  margin: 0.35em 0 0;
}

.page-about .ab-invert .eyebrow {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .ab-invert p {
  max-width: 46em;
  margin: 0 0 1.1em;
  font-size: clamp(0.97rem, 1.6vw, 1.05rem);
  line-height: 1.85;
  color: rgba(247, 251, 248, 0.82);
}

.page-about .ab-cover {
  display: grid;
  gap: 2px;
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  background: rgba(61, 245, 208, 0.28);
  border: 1px solid rgba(61, 245, 208, 0.28);
}

.page-about .ab-cover-item {
  background: var(--grass);
  padding: 15px 16px;
  font-size: 0.92rem;
  line-height: 1.72;
  color: rgba(247, 251, 248, 0.78);
}

.page-about .ab-cover-item strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .ab-duties {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  border-top: 1px solid rgba(61, 245, 208, 0.3);
}

.page-about .ab-duty {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(61, 245, 208, 0.3);
  transition: border-color var(--t-mid) ease;
}

.page-about .ab-duty-name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.03rem;
  color: var(--white);
  transition: color var(--t-fast) ease;
}

.page-about .ab-duty-note {
  font-size: 0.9rem;
  line-height: 1.76;
  color: rgba(247, 251, 248, 0.7);
}

.page-about .ab-duty:hover,
.page-about .ab-duty:focus-within {
  border-color: var(--cyan);
}

.page-about .ab-duty:hover .ab-duty-name {
  color: var(--cyan);
}

.page-about .ab-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 6px;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  border: 1px solid var(--violet);
  color: var(--violet);
  vertical-align: middle;
}

.page-about .ab-invert-tail {
  margin-top: clamp(24px, 3.4vw, 36px);
  padding-left: 16px;
  border-left: 4px solid var(--amber);
  font-size: 0.95rem;
  line-height: 1.82;
  color: rgba(247, 251, 248, 0.85);
}

/* ---------- rhythm ---------- */
.page-about .ab-rhythm {
  display: grid;
  gap: 2px;
  grid-template-columns: minmax(0, 1fr);
  background: var(--ink-deep);
  border: 2px solid var(--ink-deep);
  list-style: none;
  margin: 0 0 clamp(22px, 3.4vw, 34px);
  padding: 0;
}

.page-about .ab-rhythm li {
  background: var(--paper);
  padding: 16px;
}

.page-about .ab-rhythm .stat-num {
  display: block;
  font-size: clamp(1.3rem, 3.4vw, 1.75rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan-deep);
}

.page-about .ab-rhythm p {
  margin: 7px 0 0;
  font-size: 0.88rem;
  line-height: 1.74;
  color: rgba(5, 20, 15, 0.76);
}

/* ---------- next ---------- */
.page-about .ab-next-grid {
  display: grid;
  gap: clamp(22px, 3.6vw, 36px);
}

.page-about .ab-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .ab-entries {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--ink-deep);
}

.page-about .ab-entry {
  border-bottom: 1px solid rgba(5, 20, 15, 0.24);
}

.page-about .ab-entry a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 15px 6px;
  color: inherit;
  text-decoration: none;
  transition: background-color var(--t-fast) ease;
}

.page-about .ab-entry a:hover,
.page-about .ab-entry a:focus-visible {
  background: rgba(23, 185, 154, 0.12);
}

.page-about .ab-entry-num {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--cyan-deep);
}

.page-about .ab-entry-title {
  display: block;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.04rem;
  color: var(--ink-deep);
}

.page-about .ab-entry a:hover .ab-entry-title {
  color: var(--cyan-deep);
}

.page-about .ab-entry-desc {
  display: block;
  margin-top: 5px;
  font-size: 0.86rem;
  line-height: 1.7;
  color: rgba(5, 20, 15, 0.66);
}

@media (prefers-reduced-motion: no-preference) {
  .page-about .ab-invert {
    animation: ab-invert-lift var(--t-slow) ease-out both;
  }
}

@keyframes ab-invert-lift {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- responsive ---------- */
@media (min-width: 720px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-cover {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-duty {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

  .page-about .ab-rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-lines li {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .ab-lines h3 {
    margin-bottom: 0;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
  }

  .page-about .ab-chapter-body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 220px);
    gap: clamp(26px, 4vw, 48px);
  }

  .page-about .ab-media-row {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-about .ab-next-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  }

  .page-about .ab-prose {
    padding-right: 12px;
  }
}