.page-about {
  --about-rail: 152px;
  --about-gap: clamp(24px, 3.4vw, 48px);
}

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

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(32px, 6vw, 76px) 0 clamp(36px, 6vw, 72px);
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(34, 211, 238, 0.16), transparent 58%),
    radial-gradient(90% 70% at 6% 112%, rgba(255, 107, 44, 0.14), transparent 62%),
    var(--ink-950);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: 48vw;
  height: 48vw;
  background: conic-gradient(from 210deg at 50% 50%, rgba(34, 211, 238, 0.22), rgba(255, 107, 44, 0.18), transparent 70%);
  filter: blur(64px);
  opacity: 0.9;
  pointer-events: none;
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-about .about-hero .eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
}

.page-about .about-hero .display {
  margin: 0 0 18px;
  max-width: 20ch;
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
  font-weight: 800;
}

.page-about .about-hero .lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--steel);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(21, 42, 82, 0.55);
}

.page-about .about-hero__num {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: 0.02em;
  line-height: 1;
}

.page-about .about-hero__lab {
  font-size: 13px;
  color: var(--steel);
}

/* ---------- Chapter shell ---------- */
.page-about .about-chapter {
  position: relative;
  padding: clamp(44px, 7vw, 92px) 0;
}

.page-about .about-chapter--tint {
  background: linear-gradient(180deg, rgba(21, 42, 82, 0.5), rgba(11, 22, 51, 0));
}

.page-about .about-band {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 24px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-band::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan) 0 18%, var(--orange) 18% 32%, rgba(143, 163, 196, 0.18) 32% 100%);
}

.page-about .about-band__index {
  display: flex;
  align-items: baseline;
  gap: 14px;
  min-width: 0;
}

.page-about .about-band__no {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .about-band__title {
  margin: 0;
  font-size: clamp(19px, 2.3vw, 26px);
  line-height: 1.3;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-band__content {
  max-width: 74ch;
  min-width: 0;
}

.page-about .about-band__lede {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.82;
  color: var(--steel);
}

.page-about .about-band__content p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 247, 251, 0.84);
}

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

/* ---------- Figure / media ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(32px, 5vw, 56px);
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(21, 42, 82, 0.72), rgba(11, 22, 51, 0.5));
}

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

.page-about .about-figure .media__caption {
  display: block;
  padding: 12px 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
  background: rgba(11, 22, 51, 0.66);
  border-top: 1px solid var(--line);
}

/* ---------- Region matrix ---------- */
.page-about .region-matrix {
  list-style: none;
  margin: 0 0 clamp(32px, 5vw, 56px);
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .region-tile {
  position: relative;
  padding: 20px 18px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(21, 42, 82, 0.94), rgba(11, 22, 51, 0.7));
  cursor: pointer;
  transition: transform 220ms ease, border-color 220ms ease, background 220ms ease;
}

.page-about .region-tile::before {
  content: "";
  position: absolute;
  top: 0;
  left: 18px;
  right: 18px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(34, 211, 238, 0));
}

.page-about .region-tile:nth-child(even)::before {
  background: linear-gradient(90deg, var(--orange), rgba(255, 107, 44, 0));
}

.page-about .region-tile:hover,
.page-about .region-tile:focus-visible {
  transform: translateY(-4px);
  border-color: var(--cyan-line);
  background: linear-gradient(150deg, rgba(34, 211, 238, 0.16), rgba(21, 42, 82, 0.96));
}

.page-about .region-tile:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .region-tile__code {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin-bottom: 10px;
}

.page-about .region-tile__name {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 8px;
}

.page-about .region-tile__tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  border-radius: var(--r-pill);
  background: rgba(34, 211, 238, 0.14);
  border: 1px solid var(--cyan-line);
  color: var(--cyan);
}

.page-about .region-tile__detail {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 280ms ease, opacity 280ms ease, margin-top 280ms ease;
}

.page-about .region-tile:hover .region-tile__detail,
.page-about .region-tile:focus-visible .region-tile__detail,
.page-about .region-tile:focus-within .region-tile__detail {
  max-height: 220px;
  opacity: 1;
}

/* ---------- Timeline ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 30px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--orange));
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 20px;
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: -30px;
  top: 20px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--ink-950);
  border: 3px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.12);
}

.page-about .about-timeline__item:nth-child(even) .about-timeline__dot {
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 44, 0.14);
}

.page-about .about-timeline__card {
  padding: 18px 20px 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(21, 42, 82, 0.55);
}

.page-about .about-timeline__card .chip {
  display: inline-block;
  padding: 3px 11px;
  font-size: 12px;
  border-radius: var(--r-pill);
  color: var(--orange);
  background: rgba(255, 107, 44, 0.16);
  border: 1px solid rgba(255, 107, 44, 0.38);
}

.page-about .about-timeline__card h3 {
  margin: 12px 0 8px;
  font-size: 17px;
  line-height: 1.45;
  color: var(--paper);
  font-weight: 700;
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- Skills ---------- */
.page-about .about-skills {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-skill {
  position: relative;
  padding: 22px 20px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
  background: var(--ink-900);
}

.page-about .about-skill:nth-child(2) { border-top-color: var(--orange); }
.page-about .about-skill:nth-child(3) { border-top-color: var(--green); }
.page-about .about-skill:nth-child(4) { border-top-color: var(--amber); }

.page-about .about-skill__no {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--steel);
}

.page-about .about-skill h3 {
  margin: 0 0 10px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
  font-weight: 700;
}

.page-about .about-skill p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- Team ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .about-team__label {
  display: block;
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

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

.page-about .about-team__list li {
  padding: 14px 0;
  border-bottom: 1px dashed var(--line-2);
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .about-team__list li:first-child {
  padding-top: 0;
}

.page-about .about-team__list li strong {
  display: inline-block;
  margin-right: 8px;
  color: var(--paper);
  font-weight: 700;
}

.page-about .about-team__col--note p {
  margin: 0;
  padding: 20px 20px 20px 22px;
  border-radius: var(--r-lg);
  border-left: 3px solid var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- Facts ---------- */
.page-about .about-facts {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-facts__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts__row dt {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.page-about .about-facts__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-facts .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-about .about-facts__note {
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- Reveal (progressive enhancement) ---------- */
.js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.js .page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (min-width: 560px) {
  .page-about .region-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 760px) {
  .page-about .about-skills {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-band {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-band__index {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 34px;
  }

  .page-about .about-facts__row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

@media (min-width: 960px) {
  .page-about .region-matrix {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .about-skills {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-skill:nth-child(2),
  .page-about .about-skill:nth-child(4) {
    margin-top: 30px;
  }
}

@media (hover: none) {
  .page-about .region-tile__detail {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .region-tile,
  .page-about .region-tile__detail {
    transition: none;
  }

  .js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}