.page-about {
  --ab-line: rgba(45, 226, 230, 0.24);
  --ab-soft: #b9c6d8;
  background-color: var(--night-950);
  color: var(--paper-50);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- hero ---------- */
.page-about .ab-hero {
  position: relative;
  padding: calc(var(--header-h) + 44px) 0 52px;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(255, 59, 48, 0.2), transparent 62%),
    radial-gradient(90% 80% at -10% 110%, rgba(45, 226, 230, 0.16), transparent 68%),
    linear-gradient(180deg, var(--night-950) 0%, var(--night-900) 100%);
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(138, 151, 168, 0.16) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(0deg, rgba(138, 151, 168, 0.1) 0 1px, transparent 1px 76px);
  opacity: 0.65;
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 8%;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, transparent, rgba(45, 226, 230, 0.45), transparent);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.4vw, 74px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  max-width: 16ch;
}

.page-about .ab-hero__title span {
  display: block;
  color: var(--red-500);
}

.page-about .ab-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  color: var(--ab-soft);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .ab-stats {
  list-style: none;
  margin: 32px 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--slate-700);
  border: 1px solid var(--slate-700);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.page-about .ab-stats__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(11, 18, 32, 0.94);
}

.page-about .ab-stats__value {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--cyan-400);
  line-height: 1.1;
}

.page-about .ab-stats__label {
  font-size: 12.5px;
  color: var(--slate-400);
  letter-spacing: 0.02em;
}

/* ---------- section shell ---------- */
.page-about .ab-sec {
  padding: clamp(48px, 7vw, 92px) 0;
  border-top: 1px solid rgba(59, 70, 88, 0.6);
}

.page-about .ab-sec__head {
  max-width: 70ch;
}

.page-about .ab-h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.page-about .ab-lede {
  margin: 14px 0 0;
  color: var(--ab-soft);
  font-size: 15.5px;
  line-height: 1.8;
  max-width: 66ch;
}

.page-about .ab-link {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 226, 230, 0.45);
  padding-bottom: 1px;
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--cyan-200);
  border-bottom-color: var(--cyan-200);
}

/* ---------- origin ---------- */
.page-about .ab-origin__grid {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-about .ab-origin__text p {
  margin: 0 0 16px;
  color: var(--ab-soft);
  font-size: 16px;
  line-height: 1.85;
  max-width: 68ch;
}

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

.page-about .ab-topics {
  padding: 20px;
  border: 1px solid var(--slate-700);
  border-radius: var(--radius-card);
  background: linear-gradient(165deg, rgba(18, 28, 46, 0.96), rgba(7, 12, 22, 0.92));
}

.page-about .ab-topics__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-about .ab-topics__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-topics__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(59, 70, 88, 0.7);
}

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

.page-about .ab-topics__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber-400);
  grid-row: span 2;
  padding-top: 3px;
}

.page-about .ab-topics__list strong {
  font-size: 15px;
  font-weight: 700;
}

.page-about .ab-topics__list span:not(.ab-topics__num) {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--slate-400);
}

/* ---------- flow ---------- */
.page-about .ab-flow {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-about .ab-flow__step {
  position: relative;
  padding: 20px 18px;
  border: 1px solid var(--slate-700);
  border-radius: 4px 14px 14px 14px;
  background: linear-gradient(160deg, rgba(18, 28, 46, 0.96), rgba(11, 18, 32, 0.9));
}

.page-about .ab-flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  background: var(--red-500);
  border-radius: 3px;
}

.page-about .ab-flow__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

.page-about .ab-flow__title {
  margin: 8px 0 8px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

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

.page-about .ab-flow__figure,
.page-about .ab-version__figure,
.page-about .ab-team__figure {
  margin: 30px 0 0;
}

.page-about .ab-flow__figure img,
.page-about .ab-version__figure img,
.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-card);
  border: 1px solid var(--slate-700);
  filter: saturate(0.9);
}

.page-about .ab-version__figure img {
  max-height: 300px;
  object-position: center;
}

.page-about .ab-flow__figure figcaption,
.page-about .ab-version__figure figcaption,
.page-about .ab-team__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate-400);
}

/* ---------- timeline ---------- */
.page-about .ab-timeline {
  margin-top: 32px;
}

.page-about .ab-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .ab-timeline__node {
  position: relative;
  padding-left: 22px;
  border-left: 2px solid rgba(45, 226, 230, 0.28);
}

.page-about .ab-node__trigger {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 48px;
  padding: 10px 44px 10px 14px;
  position: relative;
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 700;
  text-align: left;
  color: var(--paper-50);
  background: var(--panel-800);
  border: 1px solid var(--slate-700);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease;
}

.page-about .ab-node__trigger::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan-400);
  transition: transform 0.18s ease;
}

.page-about .ab-node__trigger[aria-expanded="true"]::after {
  transform: translateY(-50%) rotate(45deg);
}

.page-about .ab-node__trigger:hover,
.page-about .ab-node__trigger:focus-visible {
  border-color: var(--cyan-400);
  background: #16223a;
  outline: none;
}

.page-about .ab-node__trigger:focus-visible {
  box-shadow: 0 0 0 3px rgba(45, 226, 230, 0.35);
}

.page-about .ab-node__trigger[aria-expanded="true"] {
  border-color: var(--cyan-400);
}

.page-about .ab-node__ver {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--cyan-400);
  flex: none;
}

.page-about .ab-node__name {
  flex: 1 1 auto;
}

.page-about .ab-node__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ab-soft);
}

.page-about .ab-node__panel {
  margin-top: 12px;
  padding: 14px 16px;
  border-left: 2px solid var(--cyan-400);
  border-radius: 0 10px 10px 0;
  background: rgba(18, 28, 46, 0.7);
}

.page-about .ab-node__panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--ab-soft);
}

/* ---------- teams ---------- */
.page-about .ab-teams {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-about .ab-team {
  padding: 20px 18px 22px;
  border: 1px solid var(--slate-700);
  border-radius: 14px 14px 14px 4px;
  background: linear-gradient(150deg, rgba(18, 28, 46, 0.98), rgba(7, 12, 22, 0.9));
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-about .ab-team:hover,
.page-about .ab-team:focus-within {
  border-color: rgba(45, 226, 230, 0.7);
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.4);
}

.page-about .ab-team__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber-400);
}

.page-about .ab-team__title {
  margin: 8px 0 6px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .ab-team__stat {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--cyan-400);
  padding: 5px 9px;
  display: inline-block;
  border: 1px solid rgba(45, 226, 230, 0.35);
  border-radius: 999px;
}

.page-about .ab-team__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ab-soft);
}

/* ---------- light band ---------- */
.page-about .ab-band-light {
  background: var(--paper-50);
  color: var(--night-900);
  padding: clamp(48px, 7vw, 88px) 0;
  border-top: 1px solid #dbe3ee;
  border-bottom: 1px solid #dbe3ee;
}

.page-about .ab-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red-700);
}

.page-about .ab-order__grid {
  display: grid;
  gap: 26px;
}

.page-about .ab-order__text .ab-h2 {
  color: var(--night-900);
  margin-top: 10px;
}

.page-about .ab-order__text p {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: #2c3849;
  max-width: 62ch;
}

.page-about .ab-order__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 22px;
}

.page-about .ab-order__actions .ab-link {
  color: var(--red-700);
  border-bottom-color: rgba(184, 31, 25, 0.45);
}

.page-about .ab-order__actions .ab-link:hover,
.page-about .ab-order__actions .ab-link:focus-visible {
  color: var(--night-900);
  border-bottom-color: var(--night-900);
}

.page-about .ab-console {
  padding: 18px;
  background: #ffffff;
  border: 1px solid #d8e0ec;
  border-radius: 12px 12px 12px 2px;
  box-shadow: 0 12px 26px rgba(7, 12, 22, 0.08);
}

.page-about .ab-console__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: #6b788a;
}

.page-about .ab-console__label:not(:first-child) {
  margin-top: 18px;
}

.page-about .ab-console__row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-console__tag {
  padding: 7px 12px;
  font-size: 13px;
  border-radius: 999px;
  border: 1px solid rgba(45, 226, 230, 0.9);
  background: #eafcfc;
  color: #0b1220;
}

.page-about .ab-console__tag--plain {
  border-color: #d8e0ec;
  background: #f4f7fb;
  color: #3b4658;
}

.page-about .ab-console__result {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed #d8e0ec;
  font-size: 13.5px;
  line-height: 1.7;
  color: #3b4658;
}

/* ---------- brand signals ---------- */
.page-about .ab-swatches {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .ab-swatch {
  border: 1px solid var(--slate-700);
  border-radius: 12px;
  overflow: hidden;
  background: var(--panel-800);
}

.page-about .ab-swatch__btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 48px;
  padding: 12px 40px 12px 12px;
  position: relative;
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 700;
  color: var(--paper-50);
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.16s ease;
}

.page-about .ab-swatch__btn::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--cyan-400);
  transition: transform 0.18s ease;
}

.page-about .ab-swatch__btn[aria-expanded="true"]::after {
  transform: translateY(-50%) rotate(45deg);
}

.page-about .ab-swatch__btn:hover,
.page-about .ab-swatch__btn:focus-visible {
  background: rgba(45, 226, 230, 0.08);
  outline: none;
  box-shadow: inset 0 0 0 1px rgba(45, 226, 230, 0.55);
}

.page-about .ab-swatch__chip {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid rgba(244, 247, 251, 0.18);
}

.page-about .ab-swatch__chip--night {
  background: linear-gradient(140deg, #0b1220, #070c16);
}

.page-about .ab-swatch__chip--red {
  background: var(--red-500);
}

.page-about .ab-swatch__chip--cyan {
  background: var(--cyan-400);
}

.page-about .ab-swatch__name {
  flex: 1 1 auto;
}

.page-about .ab-swatch__ratio {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate-400);
  flex: none;
}

.page-about .ab-swatch__panel {
  padding: 0 16px 16px;
}

.page-about .ab-swatch__panel p {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid rgba(59, 70, 88, 0.8);
  font-size: 14px;
  line-height: 1.78;
  color: var(--ab-soft);
}

/* ---------- contact ---------- */
.page-about .ab-contact {
  margin-top: 34px;
  padding: 22px 18px;
  display: grid;
  gap: 22px;
  border: 1px solid var(--slate-700);
  border-radius: var(--radius-card);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(255, 59, 48, 0.16), transparent 60%),
    linear-gradient(160deg, rgba(18, 28, 46, 0.98), rgba(7, 12, 22, 0.94));
}

.page-about .ab-contact__title {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .ab-contact__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ab-soft);
  max-width: 60ch;
}

.page-about .ab-contact__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin: 18px 0 0;
}

.page-about .ab-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-contact__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan-400);
  margin-bottom: 3px;
}

.page-about .ab-contact__value {
  display: block;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--paper-50);
  word-break: break-word;
}

/* ---------- responsive ---------- */
@media (min-width: 620px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .ab-swatch__btn {
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .page-about .ab-swatch__name {
    flex-basis: 100%;
  }
}

@media (min-width: 800px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .ab-flow__step::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -17px;
    width: 10px;
    height: 10px;
    border-top: 2px solid var(--red-500);
    border-right: 2px solid var(--red-500);
    transform: translateY(-50%) rotate(45deg);
  }

  .page-about .ab-flow__step:last-child::after {
    display: none;
  }

  .page-about .ab-contact {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 28px;
    padding: 28px;
  }

  .page-about .ab-order__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
    gap: 40px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding: calc(var(--header-h) + 64px) 0 72px;
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    margin-top: 40px;
  }

  .page-about .ab-origin__grid {
    grid-template-columns: 6fr 5fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .ab-timeline {
    position: relative;
    padding-top: 34px;
  }

  .page-about .ab-timeline::before {
    content: "";
    position: absolute;
    top: 8px;
    left: 6px;
    right: 6px;
    height: 2px;
    background: linear-gradient(90deg, var(--red-500), var(--cyan-400));
    opacity: 0.55;
  }

  .page-about .ab-timeline__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .ab-timeline__node {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .ab-timeline__node::before {
    content: "";
    position: absolute;
    top: -34px;
    left: 0;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--cyan-400);
    box-shadow: 0 0 0 4px rgba(45, 226, 230, 0.18);
  }

  .page-about .ab-teams {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .ab-flow__figure img {
    max-height: 360px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-team,
  .page-about .ab-node__trigger,
  .page-about .ab-node__trigger::after,
  .page-about .ab-swatch__btn,
  .page-about .ab-swatch__btn::after {
    transition: none;
  }

  .page-about .ab-team:hover,
  .page-about .ab-team:focus-within {
    transform: none;
  }
}
<<<END>>>