.page-about {
  --ab-axis-x: 9px;
  --ab-dot: 10px;
  display: block;
}

.page-about .ab-sec {
  padding: clamp(42px, 6vw, 76px) 0;
  position: relative;
}

.page-about .ab-sec--hero {
  padding-top: clamp(16px, 3vw, 28px);
  overflow: hidden;
}

.page-about .ab-sec--hero::before {
  content: "";
  position: absolute;
  inset: -20% 40% 40% -10%;
  background: radial-gradient(circle at 30% 40%, rgba(47, 224, 208, .14), rgba(47, 224, 208, 0) 62%);
  pointer-events: none;
}

.page-about .ab-sec--wine {
  background: linear-gradient(180deg, rgba(42, 15, 30, .88), rgba(42, 15, 30, .5));
  border-top: 1px solid var(--xb-line-soft);
  border-bottom: 1px solid var(--xb-line-soft);
}

.page-about .ab-sec--teal {
  background: linear-gradient(160deg, rgba(11, 31, 38, .95), rgba(7, 11, 24, .6));
  border-top: 1px solid var(--xb-line-soft);
  border-bottom: 1px solid var(--xb-line-soft);
}

/* ---------- hero ---------- */

.page-about .ab-hero {
  position: relative;
  display: grid;
  gap: 30px;
  align-items: center;
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.22;
}

.page-about .ab-hero__lede {
  margin: 18px 0 0;
  max-width: 40ch;
  color: var(--xb-paper);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .ab-hero__lede .xb-mono {
  color: var(--xb-cyan);
  font-weight: 700;
}

.page-about .ab-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}

.page-about .ab-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 12px;
  border: 1px solid var(--xb-line);
  border-radius: var(--xb-r-md);
  background: linear-gradient(150deg, rgba(232, 238, 245, .06), rgba(232, 238, 245, .012));
}

.page-about .ab-fact__num {
  font-size: 20px;
  font-weight: 700;
  color: var(--xb-cyan);
  letter-spacing: -.01em;
}

.page-about .ab-fact__key {
  font-size: 12px;
  line-height: 1.5;
  color: var(--xb-muted);
}

.page-about .ab-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-hero__art {
  border-radius: var(--xb-r-lg);
  border: 1px solid var(--xb-line);
  background: linear-gradient(165deg, rgba(11, 31, 38, .9), rgba(7, 11, 24, .35));
  padding: 18px;
  overflow: hidden;
}

.page-about .ab-hero__svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
}

/* ---------- section head ---------- */

.page-about .ab-sechead {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .ab-sechead__title {
  margin: 12px 0 0;
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.28;
}

.page-about .ab-sechead__note {
  margin: 14px 0 0;
  color: var(--xb-muted);
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- timeline ---------- */

.page-about .ab-tl {
  display: grid;
  gap: 28px;
}

.page-about .ab-tl__rail {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .ab-tl__figure {
  margin: 0;
  border-radius: var(--xb-r-lg);
  overflow: hidden;
  border: 1px solid var(--xb-line);
  background: rgba(11, 31, 38, .6);
}

.page-about .ab-tl__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 210px;
  object-fit: cover;
}

.page-about .ab-tl__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
  display: grid;
  gap: 10px;
}

.page-about .ab-tl__list::before {
  content: "";
  position: absolute;
  left: var(--ab-axis-x);
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--xb-cyan), rgba(47, 224, 208, .35) 55%, var(--xb-orange));
  transform-origin: top center;
  transform: scaleY(1);
  transition: transform 900ms var(--xb-ease);
}

.page-about .xb-js .ab-tl__list:not(.is-in)::before {
  transform: scaleY(0);
}

.page-about .ab-tl__item {
  margin: 0;
}

.page-about .ab-tl__node {
  position: relative;
  width: 100%;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  grid-template-areas:
    "code label"
    "code hint";
  gap: 2px 12px;
  padding: 13px 14px;
  text-align: left;
  color: inherit;
  background: rgba(232, 238, 245, .02);
  border: 1px solid var(--xb-line);
  border-radius: var(--xb-r-md);
  cursor: pointer;
  font: inherit;
  transition: border-color var(--xb-t) var(--xb-ease), background-color var(--xb-t) var(--xb-ease), transform var(--xb-t) var(--xb-ease);
}

.page-about .ab-tl__node::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 50%;
  width: var(--ab-dot);
  height: var(--ab-dot);
  margin-top: calc(var(--ab-dot) / -2);
  border-radius: 50%;
  background: var(--xb-muted);
  opacity: .55;
  transition: background-color var(--xb-t) var(--xb-ease), opacity var(--xb-t) var(--xb-ease), box-shadow var(--xb-t) var(--xb-ease);
}

.page-about .ab-tl__node:hover,
.page-about .ab-tl__node:focus-visible {
  border-color: rgba(47, 224, 208, .5);
  background: rgba(47, 224, 208, .06);
  outline: none;
}

.page-about .ab-tl__node:focus-visible {
  box-shadow: 0 0 0 2px rgba(47, 224, 208, .45);
}

.page-about .ab-tl__node.is-active {
  border-color: rgba(255, 122, 47, .55);
  background: linear-gradient(120deg, rgba(255, 122, 47, .12), rgba(47, 224, 208, .05));
}

.page-about .ab-tl__node.is-active::before {
  background: var(--xb-orange);
  opacity: 1;
  box-shadow: 0 0 0 5px rgba(255, 122, 47, .18);
}

.page-about .ab-tl__code {
  grid-area: code;
  align-self: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--xb-cyan);
  letter-spacing: .04em;
}

.page-about .ab-tl__node.is-active .ab-tl__code {
  color: var(--xb-orange);
}

.page-about .ab-tl__label {
  grid-area: label;
  font-size: 15px;
  font-weight: 700;
  color: var(--xb-paper);
  line-height: 1.4;
}

.page-about .ab-tl__hint {
  grid-area: hint;
  font-size: 12px;
  color: var(--xb-muted);
  line-height: 1.5;
}

.page-about .ab-tl__panels {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .ab-tl__panel {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--xb-line);
  border-radius: var(--xb-r-lg);
  background: linear-gradient(155deg, rgba(11, 31, 38, .78), rgba(7, 11, 24, .45));
}

.page-about .ab-tl__panel[hidden] {
  display: none;
}

.page-about .ab-tl__panel h3 {
  margin: 0 0 12px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--xb-paper);
}

.page-about .ab-tl__panel p {
  margin: 0;
  color: var(--xb-paper);
  font-size: 15.5px;
  line-height: 1.8;
  max-width: 42ch;
}

.page-about .ab-tl__points {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-tl__points li {
  position: relative;
  padding-left: 20px;
  color: var(--xb-muted);
  font-size: 14.5px;
  line-height: 1.7;
}

.page-about .ab-tl__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 2px;
  border-radius: 2px;
  background: var(--xb-cyan);
}

/* ---------- team ---------- */

.page-about .ab-team {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-about .ab-team__main {
  display: grid;
  gap: 20px;
}

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

.page-about .ab-team__panels {
  display: grid;
  gap: 14px;
}

.page-about .ab-team__panel {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--xb-line);
  border-radius: var(--xb-r-lg);
  background: linear-gradient(150deg, rgba(232, 238, 245, .07), rgba(232, 238, 245, .015));
}

.page-about .ab-team__panel[hidden] {
  display: none;
}

.page-about .ab-team__count {
  display: inline-block;
  margin: 0 0 10px;
  padding: 4px 12px;
  border-radius: var(--xb-pill);
  border: 1px solid rgba(47, 224, 208, .4);
  color: var(--xb-cyan);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .06em;
}

.page-about .ab-team__panel h3 {
  margin: 0 0 10px;
  font-weight: 800;
  color: var(--xb-paper);
}

.page-about .ab-team__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--xb-paper);
  max-width: 42ch;
}

.page-about .ab-team__figure {
  margin: 0;
}

.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--xb-r-lg);
  border: 1px solid var(--xb-line);
  object-fit: cover;
}

.page-about .ab-team__figure .xb-figure__caption {
  margin-top: 12px;
  color: var(--xb-muted);
  font-size: 13px;
  line-height: 1.65;
}

/* ---------- flow ---------- */

.page-about .ab-flow {
  display: grid;
  gap: 20px;
}

.page-about .ab-flow__block {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--xb-line);
  border-radius: var(--xb-r-lg);
  background: linear-gradient(150deg, rgba(232, 238, 245, .05), rgba(232, 238, 245, .012));
}

.page-about .ab-flow__block--test {
  background: linear-gradient(150deg, rgba(42, 15, 30, .6), rgba(7, 11, 24, .4));
}

.page-about .ab-flow__block h3 {
  margin: 0 0 18px;
  font-weight: 800;
  color: var(--xb-paper);
}

.page-about .ab-deflist {
  margin: 0;
  display: grid;
  gap: 2px;
}

.page-about .ab-deflist__row {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-top: 1px solid var(--xb-line-soft);
}

.page-about .ab-deflist__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .ab-deflist__row dt {
  font-size: 13px;
  font-weight: 700;
  color: var(--xb-cyan);
  letter-spacing: .04em;
}

.page-about .ab-deflist__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--xb-paper);
}

.page-about .ab-deflist__row dd .xb-mono {
  color: var(--xb-orange);
  font-weight: 700;
}

.page-about .ab-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-steps__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--xb-r-md);
  border: 1px solid var(--xb-line);
  background: rgba(232, 238, 245, .03);
}

.page-about .ab-steps__no {
  font-size: 13px;
  font-weight: 700;
  color: var(--xb-orange);
  letter-spacing: .06em;
}

.page-about .ab-steps__txt {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--xb-paper);
}

.page-about .ab-flow__foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--xb-muted);
}

/* ---------- reach ---------- */

.page-about .ab-reach {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .ab-reach__copy h2 {
  margin: 12px 0 0;
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.3;
}

.page-about .ab-reach__copy p {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--xb-paper);
  max-width: 44ch;
}

.page-about .ab-reach__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.page-about .ab-reach__figure {
  margin: 0;
}

.page-about .ab-reach__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--xb-r-lg);
  border: 1px solid var(--xb-line);
  object-fit: cover;
}

.page-about .ab-reach__figure .xb-figure__caption {
  margin-top: 12px;
  color: var(--xb-muted);
  font-size: 13px;
  line-height: 1.65;
}

/* ---------- next ---------- */

.page-about .ab-plan {
  align-items: stretch;
}

.page-about .ab-plan__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  border-radius: var(--xb-r-lg);
  transition: transform var(--xb-t) var(--xb-ease), border-color var(--xb-t) var(--xb-ease);
}

.page-about .ab-plan__card:hover {
  transform: translateY(-4px);
  border-color: rgba(47, 224, 208, .45);
}

.page-about .ab-plan__no {
  font-size: 13px;
  font-weight: 700;
  color: var(--xb-orange);
  letter-spacing: .12em;
}

.page-about .ab-plan__card h3 {
  margin: 0;
  font-weight: 800;
  color: var(--xb-paper);
}

.page-about .ab-plan__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--xb-muted);
}

.page-about .ab-close {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--xb-line);
  border-radius: var(--xb-r-lg);
  background: linear-gradient(120deg, rgba(47, 224, 208, .1), rgba(255, 122, 47, .07));
  display: grid;
  gap: 18px;
}

.page-about .ab-close__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--xb-paper);
  max-width: 46ch;
}

.page-about .ab-close__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- responsive ---------- */

@media (min-width: 760px) {
  .page-about .ab-flow {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .ab-flow__block--test {
    margin-top: 44px;
  }

  .page-about .ab-tl__figure img {
    max-height: 260px;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
    gap: 56px;
    padding-top: 8px;
  }

  .page-about .ab-hero__art {
    padding: 26px;
  }

  .page-about .ab-tl {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-tl__rail {
    position: sticky;
    top: 84px;
  }

  .page-about .ab-tl__figure img {
    max-height: 200px;
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 44px;
  }

  .page-about .ab-reach {
    grid-template-columns: minmax(0, 1fr) minmax(0, .95fr);
    gap: 48px;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-sechead {
    margin-bottom: 48px;
  }
}

@media (max-width: 520px) {
  .page-about .ab-hero__facts,
  .page-about .ab-reach__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-tl__list {
    padding-left: 22px;
  }

  .page-about .ab-tl__node {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 2px 10px;
    padding: 12px;
  }

  .page-about .ab-tl__node::before {
    left: -18px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tl__list::before,
  .page-about .ab-tl__node,
  .page-about .ab-plan__card {
    transition: none;
  }

  .page-about .ab-plan__card:hover {
    transform: none;
  }
}