.page-about {
  background: var(--c-ink);
  color: var(--c-rice);
}

.page-about .about-breadcrumb {
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 32px 24px 0;
}

.page-about h1 {
  font-family: var(--font-head);
  font-size: 36px;
  line-height: 1.12;
  letter-spacing: 1px;
  margin: 16px 0 20px;
  font-weight: 700;
}

.page-about h2 {
  font-family: var(--font-head);
  font-size: 28px;
  line-height: 1.15;
  letter-spacing: 0.5px;
  margin: 0 0 16px;
  position: relative;
  padding-left: 16px;
  font-weight: 700;
}

.page-about h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.24em;
  width: 4px;
  height: 0.68em;
  background: var(--c-primary);
  transform: skewX(-10deg);
}

.page-about h3 {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}

.page-about a {
  color: var(--c-tech);
}

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

.page-about .about-hero {
  padding: 72px 0 56px;
  background: linear-gradient(120deg, var(--c-ink) 0%, #131d29 55%, #1a2634 100%);
  border-bottom: 1px solid rgba(138, 147, 166, 0.18);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
}

.page-about .about-hero__kicker-en {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-rock);
}

.page-about .about-hero__lead {
  max-width: 62ch;
  color: var(--c-rock);
  font-size: 16px;
  line-height: 1.75;
  margin: 0;
}

.page-about .about-hero__side {
  background: rgba(36, 48, 62, 0.55);
  border-left: 3px solid var(--c-primary);
  border-radius: 0 10px 10px 0;
  padding: 24px 26px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
}

.page-about .about-hero__slogan {
  font-family: var(--font-head);
  font-size: 32px;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: 1px;
  margin: 0 0 12px;
  color: var(--c-rice);
}

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

.page-about .about-manifesto {
  padding: 64px 0;
}

.page-about .about-manifesto__inner {
  display: grid;
  gap: 44px;
}

.page-about .about-manifesto__label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-rock);
  margin: 0 0 14px;
}

.page-about .about-manifesto__text p {
  color: var(--c-rock);
  line-height: 1.8;
  margin: 12px 0;
}

.page-about .about-manifesto__nums {
  display: grid;
  gap: 4px;
}

.page-about .about-manifesto__num {
  padding: 20px 0;
  border-bottom: 1px solid rgba(138, 147, 166, 0.2);
}

.page-about .about-manifesto__num:last-child {
  border-bottom: 0;
}

.page-about .about-manifesto__num-label {
  display: block;
  font-size: 14px;
  color: var(--c-rock);
  margin-top: 6px;
}

.page-about .about-unit {
  font-size: 0.5em;
  color: var(--c-rock);
  margin-left: 2px;
  font-weight: 400;
}

.page-about .about-section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-rock);
  margin: 0 0 14px;
}

.page-about .about-section-tag::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--c-primary);
  display: inline-block;
  flex: 0 0 auto;
}

.page-about .about-section-tag--dark {
  color: var(--c-slate);
}

.page-about .about-milestones {
  padding: 64px 0;
  background: linear-gradient(180deg, rgba(11, 20, 32, 0.4), rgba(16, 23, 34, 0.9));
}

.page-about .about-milestones__head,
.page-about .about-ecosystem__head,
.page-about .about-scale__head {
  max-width: 720px;
}

.page-about .about-milestones__head p:not(.about-section-tag),
.page-about .about-ecosystem__head p:not(.about-section-tag),
.page-about .about-scale__head p:not(.about-section-tag) {
  color: var(--c-rock);
  line-height: 1.7;
  margin: 12px 0 0;
}

.page-about .about-milestones__grid {
  display: grid;
  gap: 40px;
  margin-top: 36px;
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 8px 0 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 63px;
  top: 32px;
  bottom: 20px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-primary) 0%, var(--c-tech) 65%, rgba(30, 113, 255, 0.18) 100%);
  border-radius: 2px;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 64px 1fr;
  padding-bottom: 32px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 57px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-ink);
  border: 3px solid var(--c-primary);
  z-index: 1;
}

.page-about .about-timeline__item--now::before {
  border-color: var(--c-gold);
}

.page-about .about-timeline__year {
  text-align: right;
  font-family: var(--font-data);
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--c-rock);
  padding-top: 26px;
}

.page-about .about-timeline__card {
  background: linear-gradient(135deg, rgba(36, 48, 62, 0.85), rgba(16, 22, 32, 0.85));
  border-left: 3px solid var(--c-tech);
  border-radius: 0 10px 10px 0;
  padding: 18px 22px;
  min-height: 88px;
}

.page-about .about-timeline__item--now .about-timeline__card {
  border-left-color: var(--c-gold);
  background: linear-gradient(135deg, rgba(245, 185, 66, 0.14), rgba(36, 48, 62, 0.85) 62%);
}

.page-about .about-timeline__card p {
  color: var(--c-rock);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
}

.page-about .about-milestones__figure {
  margin: 0;
  border-radius: 10px;
  overflow: hidden;
}

.page-about .about-milestones__figure img {
  filter: grayscale(0.2) contrast(1.05);
}

.page-about .about-tech {
  padding: 64px 0;
}

.page-about .about-tech__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-tech__lead {
  color: var(--c-rock);
  line-height: 1.75;
  margin: 0;
}

.page-about .about-tech__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-tech__list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(138, 147, 166, 0.22);
}

.page-about .about-tech__list-title {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--c-tech);
  text-transform: uppercase;
}

.page-about .about-tech__list li span:last-child {
  color: var(--c-rice);
  font-size: 15px;
  line-height: 1.6;
}

.page-about .about-tech__figure {
  margin: 0;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}

.page-about .about-security {
  padding: 64px 0;
  background: var(--c-rice);
  color: var(--c-ink);
}

.page-about .about-security h2 {
  color: var(--c-ink);
}

.page-about .about-security__head {
  max-width: 720px;
}

.page-about .about-security__head p:not(.about-section-tag) {
  color: rgba(11, 20, 32, 0.68);
  line-height: 1.75;
  margin: 12px 0 0;
}

.page-about .about-security__head a,
.page-about .about-security__note a {
  color: var(--c-tech);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-security__grid {
  display: grid;
  gap: 20px;
  margin-top: 36px;
}

.page-about .about-security-card {
  background: #ffffff;
  border: 1px solid rgba(11, 20, 32, 0.14);
  border-radius: 12px;
  transition: box-shadow 0.24s ease;
}

.page-about .about-security-card[open] {
  box-shadow: 0 12px 32px rgba(11, 20, 32, 0.14);
}

.page-about .about-security-card summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
}

.page-about .about-security-card summary::-webkit-details-marker {
  display: none;
}

.page-about .about-security-card summary strong {
  display: block;
  font-size: 17px;
  color: var(--c-ink);
  line-height: 1.35;
}

.page-about .about-security-card summary small {
  display: block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-rock);
  margin-top: 5px;
}

.page-about .about-security-card__icon {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  color: var(--c-primary);
  padding: 10px;
  background: rgba(232, 53, 44, 0.1);
  border-radius: 10px;
}

.page-about .about-security-card__body {
  padding: 0 22px 20px 82px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(11, 20, 32, 0.78);
}

.page-about .about-security-card__body p {
  margin: 0;
}

.page-about .about-security__note {
  margin-top: 24px;
  font-size: 14px;
  color: rgba(11, 20, 32, 0.6);
  line-height: 1.7;
}

.page-about .about-ecosystem {
  padding: 64px 0;
  background: linear-gradient(180deg, var(--c-ink), #101a26);
}

.page-about .about-ecosystem__tags {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 8px 4px 18px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  cursor: grab;
}

.page-about .about-ecosystem-tag {
  flex: 0 0 auto;
  scroll-snap-align: start;
  padding: 10px 22px;
  border: 1px solid rgba(138, 147, 166, 0.4);
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--c-rice);
  background: rgba(36, 48, 62, 0.55);
  white-space: nowrap;
}

.page-about .about-ecosystem__figure {
  margin: 8px 0 0;
  border-radius: 10px;
  overflow: hidden;
}

.page-about .about-ecosystem__note {
  max-width: 680px;
  margin: 18px 0 0;
  color: var(--c-rock);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-scale {
  padding: 64px 0;
  background: linear-gradient(180deg, #0e1620, var(--c-ink));
  border-top: 1px solid rgba(138, 147, 166, 0.12);
}

.page-about .about-scale__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 36px;
}

.page-about .about-scale-card {
  background: rgba(36, 48, 62, 0.5);
  padding: 24px 20px;
  border-radius: var(--radius);
  border-top: 3px solid transparent;
  transition: transform 0.24s ease, background 0.24s ease;
}

.page-about .about-scale-card:nth-child(1) {
  border-top-color: var(--c-primary);
}

.page-about .about-scale-card:nth-child(2) {
  border-top-color: var(--c-gold);
}

.page-about .about-scale-card:nth-child(3) {
  border-top-color: var(--c-tech);
}

.page-about .about-scale-card:nth-child(4) {
  border-top-color: var(--c-moss);
}

.page-about .about-scale-card p {
  color: var(--c-rock);
  font-size: 13px;
  line-height: 1.6;
  margin: 8px 0 0;
}

.page-about .about-scale-card__unit {
  font-size: 0.5em;
  color: var(--c-rock);
  margin-left: 2px;
  font-weight: 400;
}

.page-about .about-trust {
  padding: 64px 0;
  background: linear-gradient(135deg, rgba(232, 53, 44, 0.18) 0%, rgba(36, 48, 62, 0.85) 45%, rgba(11, 20, 32, 0.95) 100%);
  border-top: 1px solid rgba(232, 53, 44, 0.3);
}

.page-about .about-trust__inner {
  max-width: 760px;
}

.page-about .about-trust__inner > p {
  font-size: 20px;
  line-height: 1.8;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin: 0;
}

.page-about .about-trust__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

@media (min-width: 768px) {
  .page-about h1 {
    font-size: 48px;
  }

  .page-about h2 {
    font-size: 36px;
  }

  .page-about .about-hero,
  .page-about .about-manifesto,
  .page-about .about-milestones,
  .page-about .about-tech,
  .page-about .about-security,
  .page-about .about-ecosystem,
  .page-about .about-scale,
  .page-about .about-trust {
    padding: 88px 0;
  }

  .page-about .about-timeline {
    padding-top: 12px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 96px 1fr;
    padding-bottom: 40px;
  }

  .page-about .about-timeline::before {
    left: 95px;
  }

  .page-about .about-timeline__item::before {
    left: 89px;
    top: 28px;
  }

  .page-about .about-timeline__year {
    padding-top: 30px;
  }

  .page-about .about-security__grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
    gap: 64px;
    align-items: end;
  }

  .page-about .about-manifesto__inner {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 72px;
    align-items: center;
  }

  .page-about .about-milestones__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-milestones__figure {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-tech__grid {
    grid-template-columns: 1fr 1.2fr;
    gap: 64px;
  }

  .page-about .about-scale__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .page-about .about-scale-card:hover {
    transform: translateY(-4px);
    background: rgba(45, 60, 78, 0.65);
  }

  .page-about .about-trust__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    max-width: none;
  }

  .page-about .about-trust__actions {
    margin-top: 0;
    flex: 0 0 auto;
  }
}