.page-about {
  --about-flow: clamp(2.5rem, 6vw, 4.5rem);
  --about-axis: 2.75rem;
  background: var(--paper);
  color: var(--graphite);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about > .breadcrumbs {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(0.9rem, 3vw, 1.4rem) var(--gutter) 0;
}

/* ---------- hero ---------- */
.page-about .about-hero {
  padding-block: clamp(1.5rem, 4vw, 2.75rem) clamp(2.25rem, 6vw, 4rem);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-display);
  line-height: 1.06;
  letter-spacing: -0.01em;
  max-width: 15ch;
}

.page-about .about-hero__lede {
  margin: 1.25rem 0 0;
  max-width: 34em;
  font-size: var(--fs-md);
  line-height: 1.78;
  color: var(--graphite-soft);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.75rem;
  margin: 1.5rem 0 0;
  padding: 1.15rem 0 0;
  list-style: none;
  border-top: var(--line);
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: var(--fs-lg);
  font-weight: 500;
  color: var(--ink-700);
  letter-spacing: 0.03em;
}

.page-about .about-fact__txt {
  font-size: var(--fs-sm);
  color: var(--graphite-soft);
}

.page-about .about-hero__aside {
  position: relative;
  padding: clamp(2.25rem, 5vw, 2.75rem) clamp(1.4rem, 4vw, 2rem);
  background: linear-gradient(155deg, var(--ink-700), var(--ink-900) 72%);
  color: var(--paper);
  clip-path: polygon(0 3%, 100% 0, 100% 97%, 0 100%);
}

.page-about .about-hero__aside::after {
  content: "";
  position: absolute;
  left: clamp(1.4rem, 4vw, 2rem);
  top: clamp(1.5rem, 3.5vw, 1.9rem);
  width: 2.25rem;
  height: 2px;
  background: var(--amber-500);
}

.page-about .about-hero__aside-label {
  margin: 0;
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--amber-300);
}

.page-about .about-hero__stats {
  display: grid;
  gap: 1.1rem;
  margin: 1.35rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  display: grid;
  gap: 0.15rem;
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: rgba(247, 244, 236, 0.85);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: clamp(1.6rem, 3.2vw, 2.1rem);
  letter-spacing: 0.02em;
  color: var(--paper);
}

/* ---------- section frame ---------- */
.page-about .about-section {
  padding-block: var(--about-flow);
  border-top: var(--line);
}

.page-about .section-head {
  position: relative;
  margin-bottom: clamp(1.25rem, 3.5vw, 2rem);
  padding-top: 0.9rem;
}

.page-about .section-head::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 2.25rem;
  height: 2px;
  background: var(--amber-500);
}

.page-about .section-head__index {
  display: block;
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--ink-500);
}

.page-about .section-head__title {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-2xl);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-about .section-head__note {
  margin: 0.7rem 0 0;
  max-width: 36em;
  font-size: var(--fs-base);
  line-height: 1.78;
  color: var(--graphite-soft);
}

/* ---------- origin ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-origin .section-head {
  margin-bottom: 0;
}

.page-about .about-origin__body p {
  margin: 0 0 1rem;
  font-size: var(--fs-md);
  line-height: 1.8;
  color: var(--graphite);
  max-width: 36em;
}

.page-about .about-origin__body p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-origin__sign {
  display: inline-block;
  margin-top: 1.35rem;
  padding: 0.5rem 0.85rem;
  font-size: var(--fs-sm);
  letter-spacing: 0.06em;
  color: var(--ink-700);
  background: var(--paper-2);
  border: var(--line);
  border-left: 3px solid var(--amber-500);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

/* ---------- timeline ---------- */
.page-about .about-timeline__banner {
  margin: 0 0 clamp(1.5rem, 4vw, 2.5rem);
  background: var(--ink-900);
}

.page-about .about-timeline__banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-timeline__list {
  position: relative;
  margin: 0;
  padding: 0 0 0 var(--about-axis);
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75rem;
  bottom: 2rem;
  width: 1px;
  background: var(--stone-200);
}

.page-about .about-year {
  position: relative;
  padding-block: 0.25rem 0.9rem;
}

.page-about .about-year::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--about-axis) - 5.5px);
  top: 1.05rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--amber-500);
  box-shadow: 0 0 0 3px var(--paper);
}

.page-about .about-year--past::before {
  background: var(--paper);
  border: 2px solid var(--sage-500);
}

.page-about .about-year__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 0.65rem;
  padding-block: 0.35rem;
  list-style: none;
  cursor: pointer;
}

.page-about .about-year__head::-webkit-details-marker {
  display: none;
}

.page-about .about-year__head:hover .about-year__label {
  color: var(--ink-700);
}

.page-about .about-year__num {
  font-size: clamp(1.25rem, 4vw, 1.6rem);
  font-weight: 300;
  letter-spacing: 0.05em;
  color: var(--ink-700);
}

.page-about .about-year__label {
  font-size: var(--fs-base);
  font-weight: 600;
  line-height: 1.55;
  color: var(--graphite);
  transition: color var(--dur) var(--ease);
}

.page-about .about-year__sign {
  display: inline-block;
  width: 1.35rem;
  text-align: center;
}

.page-about .about-year__sign::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--fs-lg);
  line-height: 1;
  color: var(--ink-500);
}

.page-about .about-year__details[open] .about-year__sign::before {
  content: "\2212";
  color: var(--amber-500);
}

.page-about .about-year__body {
  padding: 0.3rem 0 0.85rem;
  max-width: 52ch;
}

.page-about .about-year__body p {
  margin: 0;
  font-size: var(--fs-base);
  line-height: 1.78;
  color: var(--graphite-soft);
}

/* ---------- habits ---------- */
.page-about .about-habits__grid {
  display: grid;
  gap: 1rem;
}

.page-about .about-habit {
  padding: 1.35rem 1.25rem;
  background: var(--paper-2);
  border: var(--line);
  border-radius: var(--radius-s);
  box-shadow: var(--shadow-sheet);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-habit:nth-child(2) {
  margin-inline-start: 0.75rem;
}

.page-about .about-habit:nth-child(3) {
  margin-inline-start: 1.5rem;
}

.page-about .about-habit:hover,
.page-about .about-habit:focus-within {
  transform: translateY(-12px);
  box-shadow: var(--shadow-float);
}

.page-about .about-habit__no {
  margin: 0;
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--amber-500);
}

.page-about .about-habit__title {
  margin: 0.4rem 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-xl);
  line-height: 1.25;
  color: var(--ink-900);
}

.page-about .about-habit__text {
  margin: 0;
  font-size: var(--fs-base);
  line-height: 1.78;
  color: var(--graphite-soft);
}

.page-about .about-habit__how {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--ink-500);
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease), margin var(--dur) var(--ease);
}

.page-about .about-habit:hover .about-habit__how,
.page-about .about-habit:focus-within .about-habit__how {
  max-height: 12rem;
  opacity: 1;
  margin-top: 0.9rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--stone-200);
}

/* ---------- team ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-team__media {
  margin: 0;
}

.page-about .about-team__media img,
.page-about .about-network__plot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-team__text {
  margin: 0 0 1rem;
  max-width: 38em;
  font-size: var(--fs-base);
  line-height: 1.8;
  color: var(--graphite-soft);
}

.page-about .about-team__list {
  display: grid;
  gap: 0.9rem;
  margin: 1.35rem 0 0;
  padding: 1.15rem 0 0;
  list-style: none;
  border-top: var(--line);
}

.page-about .about-team__item {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
}

.page-about .about-team__num {
  min-width: 2.2rem;
  font-size: var(--fs-xl);
  font-weight: 300;
  letter-spacing: 0.03em;
  color: var(--ink-700);
}

.page-about .about-team__cap {
  font-size: var(--fs-sm);
  line-height: 1.65;
  color: var(--graphite-soft);
}

/* ---------- network ---------- */
.page-about .about-network__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-network__text {
  margin: 0 0 1.5rem;
  max-width: 38em;
  font-size: var(--fs-base);
  line-height: 1.8;
  color: var(--graphite-soft);
}

.page-about .about-filter__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .about-chip {
  min-height: 2.5rem;
  padding: 0.45rem 0.95rem;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  color: var(--graphite);
  background: var(--paper-2);
  border: 1px solid var(--stone-200);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-chip:hover {
  border-color: var(--amber-500);
  color: var(--ink-700);
}

.page-about .about-chip[aria-pressed="true"] {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--paper);
}

.page-about .about-chip:focus-visible {
  outline: 2px solid var(--amber-500);
  outline-offset: 2px;
}

.page-about .about-filter__count {
  margin: 0.85rem 0 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--graphite-soft);
}

.page-about .about-industries {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-industry {
  padding: 1rem 1.1rem;
  background: var(--sage-100);
  border-left: 3px solid var(--sage-500);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

.page-about .about-industry[data-filtered="out"] {
  display: none;
}

.page-about .about-industry__name {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-base);
  color: var(--ink-900);
}

.page-about .about-industry__text {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: var(--graphite);
}

.page-about .about-network__plot {
  position: relative;
  margin: 0;
  padding: 0.9rem;
  background-color: var(--stone-100);
  background-image: radial-gradient(var(--stone-200) 1px, transparent 1px);
  background-size: 14px 14px;
  border: var(--line);
  border-radius: var(--radius-s);
}

.page-about .about-network__plot img {
  border-radius: var(--radius-s);
}

/* ---------- now ---------- */
.page-about .about-now__grid {
  display: grid;
  gap: 1rem;
}

.page-about .about-now__card {
  padding: 1.35rem 1.25rem 1.1rem;
  background: linear-gradient(168deg, var(--ink-700), var(--ink-900));
  color: var(--paper);
  border-radius: var(--radius-s);
  border-top: 3px solid var(--amber-500);
}

.page-about .about-now__no {
  margin: 0;
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--amber-300);
}

.page-about .about-now__title {
  margin: 0.5rem 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-lg);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-now__text {
  margin: 0 0 1.1rem;
  font-size: var(--fs-sm);
  line-height: 1.76;
  color: rgba(247, 244, 236, 0.82);
}

.page-about .about-now__link {
  display: inline-block;
  font-size: var(--fs-sm);
  color: var(--amber-300);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 200, 121, 0.5);
  padding-bottom: 0.15rem;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-now__link:hover {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- cta ---------- */
.page-about .about-cta {
  border-top: var(--line);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.75rem, 4.5vw, 2.75rem);
  background: var(--paper-2);
  border: var(--line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-sheet);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-xl);
  line-height: 1.28;
  color: var(--ink-900);
}

.page-about .about-cta__text {
  margin: 0.8rem 0 0;
  max-width: 40em;
  font-size: var(--fs-base);
  line-height: 1.78;
  color: var(--graphite-soft);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-start;
}

/* ---------- breakpoints ---------- */
@media (min-width: 720px) {
  .page-about .about-habits__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-habit:nth-child(2) {
    margin-inline-start: 0;
    margin-top: 1.25rem;
  }

  .page-about .about-habit:nth-child(3) {
    margin-inline-start: 0;
    margin-top: 0;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.78fr);
    align-items: end;
  }

  .page-about .about-hero__aside {
    clip-path: polygon(0 0, 100% 0, 100% 88%, 9% 100%);
    padding-block: 3rem 3.5rem;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .about-habits__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-habit:nth-child(2) {
    margin-top: 1.5rem;
  }

  .page-about .about-habit:nth-child(3) {
    margin-top: 3rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-network__plot {
    margin-top: 0.5rem;
  }

  .page-about .about-now__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.35fr) auto;
    align-items: center;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (hover: none) {
  .page-about .about-habit__how {
    max-height: none;
    opacity: 1;
    margin-top: 0.9rem;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--stone-200);
  }

  .page-about .about-habit:hover,
  .page-about .about-habit:focus-within {
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-habit,
  .page-about .about-habit__how,
  .page-about .about-chip,
  .page-about .about-now__link,
  .page-about .about-year__label {
    transition: none;
  }
}