.page-about {
  --ab-pad: clamp(72px, 10vw, 132px);
  --ab-gap: clamp(36px, 6vw, 64px);
  --ab-red-deep: #B31226;
  background: var(--c-space);
  overflow-x: hidden;
  font-family: var(--font-body);
  color: var(--c-text);
}

.page-about .tf-container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Hero ---------- */
.page-about .ab-hero {
  position: relative;
  min-height: min(680px, 96vh);
  display: flex;
  align-items: center;
  padding: 112px 0 48px;
  isolation: isolate;
}

.page-about .ab-hero__img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.page-about .ab-hero__shade {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0.78), rgba(11, 27, 43, 0.94));
}

.page-about .ab-hero__inner {
  max-width: 1120px;
  margin-inline: auto;
  position: relative;
}

.page-about .ab-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  font-size: 0.85rem;
  color: rgba(230, 240, 250, 0.62);
}

.page-about .ab-breadcrumb__item + .ab-breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(230, 240, 250, 0.35);
}

.page-about .ab-breadcrumb__item a {
  color: var(--c-text);
  text-decoration: none;
}

.page-about .ab-breadcrumb__item a:hover {
  color: var(--c-green);
}

.page-about .ab-hero__frame {
  position: relative;
  padding: clamp(28px, 5vw, 56px);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 4px;
  backdrop-filter: blur(12px);
}

.page-about .ab-hero__corner {
  position: absolute;
  width: 26px;
  height: 26px;
  border-color: var(--c-cyan);
  opacity: 0.75;
}

.page-about .ab-hero__corner--tl {
  top: 10px;
  left: 10px;
  border-top: 2px solid;
  border-left: 2px solid;
}

.page-about .ab-hero__corner--tr {
  top: 10px;
  right: 10px;
  border-top: 2px solid;
  border-right: 2px solid;
}

.page-about .ab-hero__corner--bl {
  bottom: 10px;
  left: 10px;
  border-bottom: 2px solid;
  border-left: 2px solid;
}

.page-about .ab-hero__corner--br {
  bottom: 10px;
  right: 10px;
  border-bottom: 2px solid;
  border-right: 2px solid;
}

.page-about .ab-hero__scale {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--c-cyan);
  text-transform: uppercase;
  margin: 0 0 18px;
}

.page-about .ab-hero__title {
  font-family: var(--font-head);
  font-size: var(--fs-hero);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: var(--c-text);
}

.page-about .ab-hero__lede {
  margin: 0;
  max-width: 680px;
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(230, 240, 250, 0.76);
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .ab-hero__stat {
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.06);
  border-left: 2px solid var(--c-green);
  border-radius: 0 12px 12px 0;
}

.page-about .ab-hero__stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 600;
  line-height: 1.2;
  color: var(--c-cyan);
}

.page-about .ab-hero__stat span {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: rgba(230, 240, 250, 0.72);
}

/* ---------- TOC ---------- */
.page-about .ab-toc {
  background: rgba(255, 255, 255, 0.03);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px 0;
}

.page-about .ab-toc__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--c-text-dim);
  text-align: center;
  margin: 0 0 14px;
}

.page-about .ab-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 24px;
}

.page-about .ab-toc__item a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--c-text);
  text-decoration: none;
  font-size: 0.92rem;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}

.page-about .ab-toc__item a:hover {
  color: var(--c-green);
  border-color: var(--c-green);
}

.page-about .ab-toc__no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--c-green);
}

/* ---------- Chapter shell ---------- */
.page-about .ab-chapter {
  position: relative;
  padding: var(--ab-pad) 0;
  scroll-margin-top: 88px;
}

.page-about .ab-chapter::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: min(132px, 34vw);
  height: 4px;
  background: linear-gradient(90deg, var(--c-green), var(--c-red));
  border-radius: 4px;
}

.page-about .ab-chapter--dark {
  background: var(--c-space);
  color: var(--c-text);
}

.page-about .ab-chapter--light {
  background: var(--c-light);
  color: var(--c-ink);
}

.page-about .ab-chapter--dark::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(125, 249, 255, 0.035) 1px, transparent 1px);
  background-size: 100% 48px;
  pointer-events: none;
}

.page-about .ab-chapter--light::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(11, 27, 43, 0.04) 1px, transparent 1px);
  background-size: 100% 44px;
  pointer-events: none;
}

.page-about .ab-chapter > .tf-container {
  position: relative;
  z-index: 1;
}

.page-about .ab-chapter__head {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: var(--ab-gap);
}

.page-about .ab-chapter__no {
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 5vw, 4.4rem);
  line-height: 1;
  font-weight: 500;
  min-width: 1.4em;
  color: var(--c-green);
  transition: transform var(--transition), color var(--transition);
}

.page-about .ab-chapter__kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

.page-about .ab-chapter--dark .ab-chapter__kicker {
  color: var(--c-text-dim);
}

.page-about .ab-chapter--light .ab-chapter__kicker {
  color: rgba(0, 27, 46, 0.55);
}

.page-about .ab-chapter__title {
  font-family: var(--font-head);
  font-size: var(--fs-section);
  font-weight: 800;
  line-height: 1.2;
  margin: 0;
}

.page-about .ab-chapter--dark .ab-chapter__title {
  color: var(--c-text);
}

.page-about .ab-chapter--light .ab-chapter__title {
  color: var(--c-ink);
}

.page-about .ab-chapter:target .ab-chapter__no {
  color: var(--c-green);
  transform: translateX(8px);
}

/* ---------- Philosophy ---------- */
.page-about .ab-philosophy__grid {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-philosophy__quote {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 2.2vw, 1.65rem);
  line-height: 1.5;
  color: var(--c-text);
  border-left: 3px solid var(--c-green);
  padding-left: 18px;
}

.page-about .ab-philosophy__text p {
  margin: 18px 0 0;
  line-height: 1.8;
  color: var(--c-text-dim);
}

.page-about .ab-principles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-principles__item {
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.page-about .ab-principles__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--c-cyan);
}

.page-about .ab-principles__item h3 {
  margin: 8px 0 6px;
  font-size: 1.08rem;
  color: var(--c-text);
}

.page-about .ab-principles__item p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--c-text-dim);
}

/* ---------- History / Timeline ---------- */
.page-about .ab-history__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .ab-timeline-wrap {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 18px;
  padding: clamp(24px, 4vw, 40px);
  backdrop-filter: blur(14px);
}

.page-about .ab-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-green), var(--c-red));
  border-radius: 2px;
}

.page-about .ab-timeline__item {
  position: relative;
  padding: 0 0 34px 30px;
}

.page-about .ab-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .ab-timeline__dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-light);
  border: 3px solid var(--c-green);
  box-shadow: 0 0 0 4px rgba(0, 196, 140, 0.18);
}

.page-about .ab-timeline__year {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--ab-red-deep);
}

.page-about .ab-timeline__card {
  padding: 6px 0 0;
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .ab-timeline__item:hover .ab-timeline__card {
  transform: translateX(6px);
}

.page-about .ab-timeline__card h3 {
  margin: 6px 0 6px;
  font-size: 1.05rem;
  color: var(--c-ink);
}

.page-about .ab-timeline__card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.65;
  color: rgba(0, 27, 46, 0.68);
}

/* ---------- Shared media ---------- */
.page-about .ab-media {
  margin: 0;
}

.page-about .ab-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(11, 27, 43, 0.14);
}

.page-about .ab-media figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: rgba(0, 27, 46, 0.52);
}

/* ---------- Capability ---------- */
.page-about .ab-capability__grid {
  list-style: none;
  margin: 0 0 40px;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .ab-capability__metric {
  padding: 22px 16px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
}

.page-about .ab-capability__metric strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  line-height: 1;
  color: var(--c-cyan);
}

.page-about .ab-capability__metric span {
  display: block;
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--c-text-dim);
}

.page-about .ab-capability__desc {
  display: grid;
  gap: 16px;
  max-width: 960px;
}

.page-about .ab-capability__desc p {
  margin: 0;
  line-height: 1.8;
  color: var(--c-text-dim);
}

.page-about .ab-capability__desc strong {
  color: var(--c-text);
  font-weight: 600;
}

.page-about .ab-capability__tags {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .ab-capability__tags li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--c-cyan);
  background: rgba(125, 249, 255, 0.06);
  border: 1px solid rgba(125, 249, 255, 0.18);
  padding: 7px 12px;
  border-radius: 999px;
}

/* ---------- Team ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .ab-team__intro p {
  margin: 0 0 24px;
  line-height: 1.8;
  color: rgba(0, 27, 46, 0.72);
}

.page-about .ab-team__intro strong {
  color: var(--c-ink);
}

.page-about .ab-team__roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.page-about .ab-team__role {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 18px 16px;
  background: rgba(255, 255, 255, 0.65);
  border-left: 3px solid var(--c-green);
  border-radius: 0 14px 14px 0;
}

.page-about .ab-team__role-count {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1;
  min-width: 56px;
  color: var(--c-ink);
}

.page-about .ab-team__role h3 {
  margin: 2px 0 6px;
  font-size: 1rem;
  color: var(--c-ink);
}

.page-about .ab-team__role p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(0, 27, 46, 0.65);
}

/* ---------- Honor ---------- */
.page-about .ab-honor__grid {
  display: grid;
  gap: 20px;
}

.page-about .ab-honor__panel {
  padding: 30px 26px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
}

.page-about .ab-honor__panel-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--c-yellow);
  margin: 0 0 18px;
}

.page-about .ab-honor__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-honor__list li {
  position: relative;
  padding: 12px 0 12px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  line-height: 1.6;
  color: var(--c-text);
}

.page-about .ab-honor__list li:last-child {
  border-bottom: 0;
}

.page-about .ab-honor__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--c-green);
}

/* ---------- Outro ---------- */
.page-about .ab-outro {
  background: linear-gradient(180deg, rgba(11, 27, 43, 0.96), rgba(11, 27, 43, 0.98));
  color: var(--c-text);
  padding: var(--ab-pad) 0;
  text-align: center;
}

.page-about .ab-outro__kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--c-cyan);
  margin: 0 0 12px;
}

.page-about .ab-outro__title {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  line-height: 1.25;
  margin: 0 0 18px;
  color: var(--c-text);
}

.page-about .ab-outro__text {
  max-width: 680px;
  margin: 0 auto 32px;
  line-height: 1.7;
  color: var(--c-text-dim);
}

.page-about .ab-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.page-about .tf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.page-about .tf-btn:hover {
  transform: translateY(-2px);
}

.page-about .tf-btn--primary {
  background: linear-gradient(135deg, #00C48C, #00A97B);
  color: #001B2E;
}

.page-about .tf-btn--ghost {
  border: 1px solid rgba(230, 240, 250, 0.35);
  background: transparent;
  color: var(--c-text);
}

.page-about .tf-btn--ghost:hover {
  border-color: var(--c-green);
  color: var(--c-green);
}

/* ---------- Desktop breakpoints ---------- */
@media (min-width: 680px) {
  .page-about .ab-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 820px) {
  .page-about .ab-capability__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .ab-philosophy__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
  }

  .page-about .ab-history__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: 48px;
  }

  .page-about .ab-team__grid {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 48px;
  }
}