.page-about {
  --about-accent: var(--cyan);
  --about-rail: 210px;
  display: block;
  overflow-x: clip;
}

.page-about .about-hero {
  padding: 20px 0 0;
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(20px, 4vw, 44px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 110% at 10% 0%, rgba(40, 240, 210, .12), transparent 58%),
    radial-gradient(90% 90% at 100% 100%, rgba(139, 92, 255, .14), transparent 60%),
    linear-gradient(165deg, #101A33 0%, #070B1A 72%);
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 30px 100%, 0 calc(100% - 30px));
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}

.page-about .about-hero__copy h1 {
  margin: 14px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(34px, 7.6vw, 66px);
  line-height: .98;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .about-hero__lead {
  max-width: 56ch;
  margin: 0;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.75;
}

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

.page-about .about-hero__console {
  border-left: 1px solid var(--line);
  padding-left: clamp(0px, 3vw, 28px);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 22px;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-about .about-stats__num {
  display: block;
  font-size: clamp(22px, 3vw, 30px);
  color: var(--cyan);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  color: var(--mist);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-about .about-hero__band {
  display: block;
  width: 96px;
  margin-top: 26px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 55%, var(--lava));
}

/* switcher */
.page-about .switcher {
  position: relative;
  display: block;
  border: 1px solid var(--line-strong);
  background: rgba(11, 20, 40, .78);
  padding: 18px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .switcher__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .switcher__tab {
  cursor: pointer;
  padding: 7px 12px;
  border: 1px solid var(--line);
  color: var(--mist);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .switcher__tab:hover {
  color: var(--silver);
  border-color: var(--line-strong);
}

.page-about #view-transfer:checked ~ .switcher__tabs label[for="view-transfer"],
.page-about #view-form:checked ~ .switcher__tabs label[for="view-form"],
.page-about #view-version:checked ~ .switcher__tabs label[for="view-version"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about #view-transfer:focus-visible ~ .switcher__tabs label[for="view-transfer"],
.page-about #view-form:focus-visible ~ .switcher__tabs label[for="view-form"],
.page-about #view-version:focus-visible ~ .switcher__tabs label[for="view-version"] {
  outline: 2px solid var(--lava);
  outline-offset: 2px;
}

.page-about .switcher__panel {
  display: none;
  padding-top: 16px;
}

.page-about #view-transfer:checked ~ .switcher__panels .switcher__panel[data-panel="transfer"],
.page-about #view-form:checked ~ .switcher__panels .switcher__panel[data-panel="form"],
.page-about #view-version:checked ~ .switcher__panels .switcher__panel[data-panel="version"] {
  display: block;
}

.page-about .switcher__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .switcher__text {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .switcher__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .switcher__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .switcher__facts .data-num {
  font-size: 24px;
  color: var(--cyan);
}

.page-about .switcher__facts span:last-child {
  color: var(--mist);
  font-size: 12px;
  letter-spacing: .06em;
}

/* .page-about layout */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: clamp(36px, 6vw, 70px);
}

.page-about .about-rail {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  color: var(--mist);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  color: var(--mist);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--silver);
  border-color: var(--cyan);
}

.page-about .about-rail__list .mono {
  color: var(--violet);
  font-size: 12px;
}

.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(46px, 7vw, 92px);
  min-width: 0;
}

.page-about .about-chapter {
  --chapter-accent: var(--cyan);
  position: relative;
  padding-top: 26px;
  border-top: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--chapter-accent), rgba(124, 141, 181, .2) 60%, transparent) 1;
}

.page-about .about-chapter--violet { --chapter-accent: var(--violet); }
.page-about .about-chapter--lava { --chapter-accent: var(--lava); }

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .about-chapter__no {
  color: var(--chapter-accent);
  font-size: 13px;
  letter-spacing: .22em;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.05;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .about-chapter__lead {
  max-width: 62ch;
  margin: 16px 0 0;
  color: var(--mist);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
}

.page-about .about-chapter .grid {
  margin-top: clamp(24px, 3.5vw, 40px);
}

.page-about .about-note {
  margin: 24px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--chapter-accent);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(40, 240, 210, .5);
}

/* cards */
.page-about .about-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
}

.page-about .about-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 21px;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .about-card__text {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-card__points {
  margin: 6px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .about-card__points li {
  position: relative;
  padding-left: 16px;
  color: var(--silver);
  font-size: 13px;
  letter-spacing: .02em;
}

.page-about .about-card__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-card.panel--tint-violet .about-card__points li::before { background: var(--violet); }
.page-about .about-card.panel--tint-lava .about-card__points li::before { background: var(--lava); }

/* system */
.page-about .about-system {
  align-items: start;
}

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

.page-about .about-system__body {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

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

.page-about .about-system__item {
  position: relative;
  padding: 16px 18px 16px 22px;
  border: 1px solid var(--line);
  background: linear-gradient(100deg, rgba(16, 26, 51, .92), rgba(11, 20, 40, .5));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}

.page-about .about-system__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  background: var(--cyan);
}

.page-about .about-system__item:nth-child(2)::before { background: var(--lava); }
.page-about .about-system__item:nth-child(3)::before { background: var(--violet); }

.page-about .about-system__item:hover,
.page-about .about-system__item:focus-within {
  border-color: var(--line-strong);
  transform: translateX(4px);
}

.page-about .about-system__item h3 {
  margin: 10px 0 6px;
  font-size: 17px;
  letter-spacing: .03em;
  color: var(--silver);
}

.page-about .about-system__item p {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-system__deliver {
  padding: 18px;
  border: 1px dashed var(--line-strong);
  background: rgba(139, 92, 255, .07);
}

.page-about .about-system__deliver-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--violet);
  font-size: 14px;
}

.page-about .about-system__deliver p {
  margin: 0 0 16px;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}

/* timeline */
.page-about .timeline {
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0 0 0 22px;
  list-style: none;
  position: relative;
  display: grid;
  gap: 16px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--violet) 55%, var(--lava));
  opacity: .7;
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: rgba(16, 26, 51, .6);
  transition: transform .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 24px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 12px rgba(40, 240, 210, .55);
}

.page-about .timeline__item:hover,
.page-about .timeline__item:focus-within,
.page-about .timeline__item:focus {
  transform: translateX(6px);
  border-color: rgba(40, 240, 210, .55);
  background: rgba(16, 26, 51, .95);
  outline: none;
}

.page-about .timeline__item:nth-child(3)::before { border-color: var(--violet); box-shadow: 0 0 12px rgba(139, 92, 255, .55); }
.page-about .timeline__item:nth-child(4)::before { border-color: var(--lava); box-shadow: 0 0 12px rgba(255, 107, 53, .55); }

.page-about .timeline__year {
  color: var(--cyan);
  font-size: 18px;
  letter-spacing: .14em;
}

.page-about .timeline__item:nth-child(3) .timeline__year { color: var(--violet); }
.page-about .timeline__item:nth-child(4) .timeline__year { color: var(--lava); }

.page-about .timeline__title {
  margin: 0 0 6px;
  font-size: 17px;
  letter-spacing: .03em;
  color: var(--silver);
}

.page-about .timeline__text {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-history__fig {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

/* team */
.page-about .about-team {
  align-items: start;
}

.page-about .about-team__chart {
  padding: 18px;
  background: rgba(11, 20, 40, .72);
}

.page-about .about-radar {
  display: block;
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
}

.page-about .about-radar__grid {
  fill: rgba(40, 240, 210, .05);
  stroke: var(--line-strong);
  stroke-width: 1;
}

.page-about .about-radar__grid--mid {
  fill: none;
  stroke-dasharray: 4 6;
}

.page-about .about-radar__axis {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .about-radar__shape {
  fill: rgba(139, 92, 255, .28);
  stroke: var(--violet);
  stroke-width: 2;
  stroke-linejoin: round;
}

.page-about .about-radar__dot {
  fill: var(--cyan);
}

.page-about .about-radar__label {
  fill: var(--mist);
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-about .about-team__caption {
  margin: 12px 0 0;
  color: var(--mist);
  font-size: 13px;
  line-height: 1.7;
  text-align: center;
}

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

.page-about .about-roles__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  background: rgba(16, 26, 51, .55);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .about-roles__item:hover,
.page-about .about-roles__item:focus-within,
.page-about .about-roles__item:focus {
  border-left-color: var(--cyan);
  background: rgba(16, 26, 51, .95);
  outline: none;
}

.page-about .about-roles__num {
  font-size: 30px;
  color: var(--cyan);
  line-height: 1;
}

.page-about .about-roles__title {
  margin: 0 0 6px;
  font-size: 16px;
  letter-spacing: .04em;
  color: var(--silver);
}

.page-about .about-roles__item p {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.7;
}

/* partners */
.page-about .about-partners {
  align-items: start;
}

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

.page-about .about-network {
  padding: 18px;
  background: rgba(11, 20, 40, .72);
}

.page-about .about-network__svg {
  display: block;
  width: 100%;
}

.page-about .about-network__link {
  stroke: rgba(40, 240, 210, .45);
  stroke-width: 1.5;
  stroke-dasharray: 5 6;
}

.page-about .about-network__core {
  fill: rgba(40, 240, 210, .12);
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-about .about-network__core-text {
  fill: var(--silver);
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-about .about-network__node {
  fill: rgba(7, 11, 26, .9);
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-about .about-network__node--violet {
  stroke: var(--violet);
}

.page-about .about-network__node-text {
  fill: var(--mist);
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .04em;
}

.page-about .about-network__caption {
  margin: 14px 0 0;
  color: var(--mist);
  font-size: 13px;
  line-height: 1.7;
}

.page-about .about-facts {
  margin-top: 26px;
}

.page-about .about-fact {
  padding: 18px;
  border-top: 2px solid var(--violet);
  background: rgba(139, 92, 255, .06);
}

.page-about .about-fact__num {
  display: block;
  font-size: clamp(30px, 5vw, 44px);
  color: var(--violet);
}

.page-about .about-fact__text {
  margin: 10px 0 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-award {
  margin-top: 26px;
  padding: 22px;
}

.page-about .about-award h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 24px;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--lava);
}

.page-about .about-award p {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}

/* service */
.page-about .about-service {
  align-items: stretch;
}

.page-about .about-service__item {
  padding: 20px;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(16, 26, 51, .92), rgba(7, 11, 26, .6));
  clip-path: polygon(22px 0, 100% 0, 100% 100%, 0 100%, 0 22px);
}

.page-about .about-service__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .about-service__item p {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-cta {
  margin-top: 28px;
  padding: clamp(22px, 3vw, 34px);
  display: grid;
  gap: 22px;
  border-color: rgba(40, 240, 210, .4);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(255, 107, 53, .14), transparent 60%),
    linear-gradient(150deg, rgba(16, 26, 51, .95), rgba(7, 11, 26, .8));
}

.page-about .about-cta h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 30px);
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 60ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

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

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

  .page-about .timeline__item {
    grid-template-columns: 92px 1fr;
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.15fr .85fr;
  }

  .page-about .about-cta {
    grid-template-columns: 1.4fr .9fr;
    align-items: center;
  }

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

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    border-top: none;
    border-left: 1px solid var(--line);
    padding: 4px 0 4px 16px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-about .about-rail__list a {
    border-color: transparent;
    padding-left: 0;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    border-color: transparent;
    color: var(--cyan);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-system__item,
  .page-about .timeline__item,
  .page-about .about-roles__item,
  .page-about .switcher__tab {
    transition: none;
  }

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