.page-about {
  --about-accent: var(--c-accent);
  --about-hot: var(--c-accent-hot);
  --about-gold: var(--c-gold);
  --about-gold-dim: var(--c-gold-dim);
  --about-bg2: var(--c-bg2);
  --about-bg3: var(--c-bg3);
  --about-text: var(--c-text);
  --about-dim: var(--c-text-dim);
  --about-line: var(--c-line);
}

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

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 48px;
  background:
    radial-gradient(circle at 84% 18%, rgba(224, 20, 20, 0.16), transparent 44%),
    linear-gradient(180deg, var(--c-bg) 0%, var(--c-bg2) 100%);
  border-bottom: 1px solid rgba(224, 20, 20, 0.3);
}

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

.page-about .about-hero-speedline-1,
.page-about .about-hero-speedline-2 {
  position: absolute;
  display: block;
  height: 2px;
  width: 320px;
  transform: rotate(-18deg);
  background: linear-gradient(90deg, transparent, var(--c-accent), var(--c-gold), transparent);
  opacity: 0.45;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero-speedline-1 {
  top: 168px;
  left: -60px;
}

.page-about .about-hero-speedline-2 {
  top: 210px;
  left: 24px;
  width: 180px;
  background: linear-gradient(90deg, transparent, var(--c-gold-dim), transparent);
  opacity: 0.3;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

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

.page-about .about-hero h1.page-title {
  font-size: clamp(2.3rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 8px 0 12px;
}

.page-about .about-hero-lead {
  font-family: var(--f-head);
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--c-text);
  margin: 0 0 12px;
  line-height: 1.6;
}

.page-about .about-hero-desc {
  font-family: var(--f-body);
  font-size: 0.94rem;
  color: var(--c-text-dim);
  line-height: 1.85;
  margin: 0;
  max-width: 66ch;
  border-left: 2px solid rgba(245, 184, 61, 0.45);
  padding-left: 14px;
}

.page-about .about-hero-aside {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-hero-fact {
  position: relative;
  overflow: hidden;
  background: var(--c-bg2);
  border: 1px solid rgba(232, 73, 73, 0.28);
  padding: 14px 12px;
}

.page-about .about-hero-fact:last-child {
  grid-column: 1 / -1;
}

.page-about .about-hero-fact::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, transparent 50%, var(--c-accent) 50%);
}

.page-about .about-hero-fact-num {
  display: block;
  font-family: var(--f-data);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.4vw, 1.8rem);
  color: var(--c-accent);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.page-about .about-hero-fact-label {
  display: block;
  font-family: var(--f-ui);
  font-size: 0.75rem;
  color: var(--c-text-dim);
  margin-top: 5px;
  line-height: 1.4;
}

.page-about .about-body {
  padding: 40px 0 0;
}

.page-about .about-main-grid {
  align-items: start;
  gap: 28px;
}

.page-about .about-index {
  margin-bottom: 28px;
}

.page-about .about-index-note {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(232, 73, 73, 0.3);
}

.page-about .about-index-note p {
  font-family: var(--f-ui);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gold-dim);
  margin: 0 0 10px;
}

.page-about .about-index-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-articles {
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 20px);
  border-top: 1px solid rgba(224, 20, 20, 0.4);
  padding-top: 30px;
  position: relative;
}

.page-about .about-section-head {
  margin-bottom: 18px;
}

.page-about .about-section-head .chapter-label {
  font-family: var(--f-ui);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gold-dim);
  margin: 0 0 8px;
}

.page-about .about-section-head .chapter-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 900;
  color: var(--c-text);
  line-height: 1.28;
  margin: 0;
  position: relative;
  padding-left: 14px;
}

.page-about .about-section-head .chapter-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 5px;
  width: 4px;
  background: linear-gradient(180deg, var(--c-accent), var(--c-gold));
  transform: skewX(-18deg);
}

.page-about .about-section-lead {
  font-size: 0.94rem;
  color: var(--c-text-dim);
  line-height: 1.85;
  max-width: 64ch;
  margin: 0 0 24px;
}

.page-about .about-positioning {
  display: grid;
  gap: 18px;
}

.page-about .position-main {
  background: linear-gradient(135deg, var(--c-bg2), var(--c-bg3));
  border-left: 3px solid var(--c-accent);
  padding: 18px;
}

.page-about .position-main p {
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--c-text);
  margin: 0;
}

.page-about .position-rules {
  display: grid;
  gap: 12px;
}

.page-about .rule-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--c-bg2);
  border: 1px solid rgba(160, 160, 184, 0.16);
  padding: 14px;
}

.page-about .rule-num {
  font-family: var(--f-data);
  font-weight: 800;
  font-size: 0.88rem;
  color: var(--c-gold);
  line-height: 1.6;
  flex: 0 0 auto;
}

.page-about .rule-item p {
  font-size: 0.88rem;
  color: var(--c-text-dim);
  line-height: 1.7;
  margin: 0;
}

.page-about .about-media {
  margin: 26px 0 0;
}

.page-about .about-media img {
  display: block;
  width: 100%;
  object-fit: cover;
  border: 1px solid rgba(160, 160, 184, 0.2);
}

.page-about .about-media-archive {
  margin-top: 4px;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 22px;
  margin-top: 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-accent), var(--c-gold-dim), rgba(245, 184, 61, 0));
}

.page-about .timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding-left: 40px;
}

.page-about .timeline-marker {
  position: absolute;
  left: 9px;
  top: 10px;
  width: 10px;
  height: 10px;
  background: var(--c-gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(245, 184, 61, 0.18);
}

.page-about .timeline-year {
  font-family: var(--f-data);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--c-text);
  background: linear-gradient(120deg, var(--c-text), var(--c-text-dim));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: background 0.3s ease;
}

.page-about .timeline-card {
  position: relative;
  background: var(--c-bg2);
  border: 1px solid rgba(160, 160, 184, 0.14);
  padding: 18px;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .timeline-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 3px;
  background: linear-gradient(180deg, var(--c-accent), var(--c-gold));
  opacity: 0.85;
}

.page-about .timeline-item:hover .timeline-card {
  border-color: rgba(224, 20, 20, 0.45);
  transform: translateX(4px);
  box-shadow: var(--shadow-1);
}

.page-about .timeline-item:hover .timeline-year {
  background: linear-gradient(120deg, var(--c-accent), var(--c-gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .timeline-title {
  font-family: var(--f-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 8px;
}

.page-about .timeline-desc {
  font-size: 0.9rem;
  color: var(--c-text-dim);
  line-height: 1.75;
  margin: 0 0 12px;
}

.page-about .timeline-fact {
  display: flex;
  align-items: baseline;
  gap: 10px;
  border-top: 1px solid rgba(232, 73, 73, 0.35);
  padding-top: 10px;
}

.page-about .timeline-fact-num {
  font-family: var(--f-data);
  font-weight: 800;
  font-size: 1.45rem;
  line-height: 1;
  color: var(--c-accent);
  white-space: nowrap;
}

.page-about .timeline-fact-label {
  font-size: 0.8rem;
  color: var(--c-text-dim);
}

.page-about .data-scale-layout {
  display: grid;
  gap: 28px;
}

.page-about .data-donut-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
}

.page-about .data-donut-chart {
  position: relative;
  width: 200px;
  height: 200px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
}

.page-about .data-donut-ring {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: conic-gradient(
    var(--c-accent) 0 41.7%,
    var(--c-gold) 41.7% 50%,
    var(--c-line) 50% 66.7%,
    var(--c-bg3) 66.7% 100%
  );
}

.page-about .data-donut-ring::after {
  content: "";
  position: absolute;
  inset: 21%;
  border-radius: 50%;
  background: var(--c-bg);
  border: 1px solid rgba(232, 73, 73, 0.3);
}

.page-about .data-donut-center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  z-index: 1;
  pointer-events: none;
}

.page-about .data-donut-center-num {
  font-family: var(--f-data);
  font-weight: 800;
  font-size: 2rem;
  line-height: 1;
  color: var(--c-gold);
}

.page-about .data-donut-center-label {
  font-family: var(--f-ui);
  font-size: 0.72rem;
  color: var(--c-text-dim);
  margin-top: 4px;
}

.page-about .data-donut-legend {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .data-donut-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.86rem;
  color: var(--c-text-dim);
}

.page-about .data-donut-legend em {
  font-style: normal;
  font-family: var(--f-data);
  font-weight: 600;
  color: var(--c-text);
  margin-left: auto;
  padding-left: 24px;
}

.page-about .legend-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  transform: skewX(-18deg);
}

.page-about .legend-swatch-a {
  background: var(--c-accent);
}

.page-about .legend-swatch-b {
  background: var(--c-gold);
}

.page-about .legend-swatch-c {
  background: var(--c-line);
}

.page-about .legend-swatch-d {
  background: var(--c-bg3);
  border: 1px solid rgba(232, 73, 73, 0.35);
}

.page-about .data-scale-list {
  display: grid;
  gap: 12px;
}

.page-about .scale-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--c-bg2);
  border-left: 3px solid var(--c-accent);
  padding: 14px 16px;
}

.page-about .scale-num {
  font-family: var(--f-data);
  font-weight: 800;
  font-size: clamp(1.3rem, 2.6vw, 1.8rem);
  color: var(--c-accent);
  min-width: 96px;
  white-space: nowrap;
}

.page-about .scale-copy strong {
  display: block;
  font-family: var(--f-head);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .scale-copy span {
  font-size: 0.82rem;
  color: var(--c-text-dim);
  line-height: 1.5;
}

.page-about .data-tools {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
}

.page-about .tool-card {
  position: relative;
  overflow: hidden;
  background: var(--c-bg3);
  border: 1px solid rgba(160, 160, 184, 0.12);
  padding: 18px;
}

.page-about .tool-card::before {
  content: "";
  position: absolute;
  right: -22px;
  top: -22px;
  width: 60px;
  height: 60px;
  background: rgba(224, 20, 20, 0.2);
  transform: rotate(45deg);
}

.page-about .tool-card h3 {
  font-family: var(--f-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 8px;
}

.page-about .tool-card p {
  font-size: 0.88rem;
  color: var(--c-text-dim);
  line-height: 1.7;
  margin: 0;
}

.page-about .about-catalog-tree {
  margin-top: 20px;
  background: var(--c-bg2);
  border: 1px solid rgba(160, 160, 184, 0.18);
}

.page-about .catalog-details[open] .catalog-summary {
  background: var(--c-bg3);
}

.page-about .catalog-summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: var(--f-head);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-text);
  padding: 16px;
  transition: background-color 0.2s ease;
}

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

.page-about .catalog-summary::after {
  content: "+";
  font-family: var(--f-data);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--c-gold);
  transition: transform 0.2s ease;
}

.page-about .catalog-details[open] .catalog-summary::after {
  content: "–";
}

.page-about .catalog-tree {
  padding: 4px 16px 16px;
}

.page-about .catalog-tree ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .catalog-tree > ul {
  padding-left: 2px;
}

.page-about .catalog-tree li {
  position: relative;
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--c-text-dim);
  padding-left: 16px;
}

.page-about .catalog-tree li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52em;
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  transform: skewX(-18deg);
}

.page-about .catalog-tree li > span {
  font-family: var(--f-head);
  font-weight: 700;
  color: var(--c-text);
}

.page-about .catalog-tree li ul {
  margin-top: 8px;
  padding-left: 6px;
}

.page-about .about-team {
  display: grid;
  gap: 20px;
  margin: 24px 0 0;
}

.page-about .team-block {
  position: relative;
  overflow: hidden;
  background: var(--c-bg2);
  border: 1px solid rgba(232, 73, 73, 0.24);
  padding: 22px 18px;
}

.page-about .team-block::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, transparent 50%, rgba(224, 20, 20, 0.35) 50%);
}

.page-about .team-block-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .team-block-count {
  font-family: var(--f-data);
  font-weight: 800;
  font-size: 1.45rem;
  color: var(--c-gold);
  line-height: 1;
}

.page-about .team-block h3 {
  font-family: var(--f-head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 10px;
}

.page-about .team-block p {
  font-size: 0.9rem;
  color: var(--c-text-dim);
  line-height: 1.75;
  margin: 0 0 14px;
}

.page-about .team-block-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .team-block-list li {
  position: relative;
  padding-left: 14px;
  font-size: 0.85rem;
  color: var(--c-text-dim);
  line-height: 1.65;
}

.page-about .team-block-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52em;
  width: 6px;
  height: 6px;
  background: var(--c-line);
  transform: skewX(-18deg);
}

.page-about .about-ecosystem {
  display: grid;
  gap: 14px;
  align-items: center;
  margin-top: 20px;
  padding: 22px;
  background: linear-gradient(120deg, rgba(224, 20, 20, 0.12), transparent 72%);
  border: 1px solid rgba(232, 73, 73, 0.2);
}

.page-about .ecosystem-meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .ecosystem-num {
  font-family: var(--f-data);
  font-weight: 800;
  font-size: 2.8rem;
  line-height: 1;
  color: var(--c-accent);
}

.page-about .ecosystem-label {
  font-family: var(--f-head);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-text);
}

.page-about .about-ecosystem p {
  font-size: 0.88rem;
  color: var(--c-text-dim);
  line-height: 1.75;
  margin: 0;
}

.page-about .about-schedule {
  display: grid;
  gap: 0;
}

.page-about .schedule-block {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 18px 0 18px 20px;
  border-left: 1px solid rgba(232, 73, 73, 0.4);
}

.page-about .schedule-block::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 22px;
  width: 7px;
  height: 7px;
  background: var(--c-gold);
  transform: skewX(-18deg);
}

.page-about .schedule-time {
  font-family: var(--f-data);
  font-weight: 800;
  font-size: 1.55rem;
  line-height: 1.15;
  color: var(--c-accent);
  letter-spacing: -0.01em;
}

.page-about .schedule-body h3 {
  font-family: var(--f-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 6px;
}

.page-about .schedule-body p {
  font-size: 0.88rem;
  color: var(--c-text-dim);
  line-height: 1.7;
  margin: 0;
  max-width: 64ch;
}

.page-about .about-outro {
  margin-top: 56px;
  padding: 40px 0 48px;
  background: linear-gradient(180deg, transparent, rgba(224, 20, 20, 0.08));
}

.page-about .outro-card {
  position: relative;
  overflow: hidden;
  background: var(--c-bg2);
  border: 1px solid rgba(224, 20, 20, 0.3);
  padding: 28px;
}

.page-about .outro-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-gold), transparent);
}

.page-about .outro-label {
  font-family: var(--f-ui);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-gold-dim);
  margin: 0 0 8px;
}

.page-about .outro-title {
  font-family: var(--f-head);
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 900;
  line-height: 1.3;
  color: var(--c-text);
  margin: 0 0 12px;
}

.page-about .outro-desc {
  font-size: 0.9rem;
  color: var(--c-text-dim);
  line-height: 1.75;
  margin: 0 0 20px;
  max-width: 62ch;
}

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

@media (min-width: 760px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

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

  .page-about .about-hero-fact:last-child {
    grid-column: auto;
  }

  .page-about .about-hero-desc {
    font-size: 1rem;
  }

  .page-about .about-timeline::before {
    left: 132px;
  }

  .page-about .timeline-item {
    grid-template-columns: 120px 24px minmax(0, 1fr);
    gap: 16px;
    padding-left: 0;
  }

  .page-about .timeline-marker {
    left: 127px;
    top: 16px;
  }

  .page-about .timeline-year {
    text-align: right;
    font-size: clamp(2.4rem, 5vw, 4rem);
    padding-top: 4px;
  }

  .page-about .data-donut-block {
    justify-content: center;
  }

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

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

  .page-about .about-ecosystem {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .page-about .schedule-block {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 24px;
    padding-left: 28px;
  }

  .page-about .schedule-block::before {
    top: 22px;
    left: -4px;
  }

  .page-about .schedule-time {
    text-align: right;
    padding-top: 2px;
  }

  .page-about .outro-card {
    padding: 36px;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-body {
    padding-top: 52px;
  }

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

  .page-about .about-articles {
    gap: 72px;
  }

  .page-about .about-section {
    padding-top: 38px;
  }

  .page-about .about-positioning {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .position-rules {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .position-main {
    padding: 22px;
  }

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

  .page-about .rule-item {
    flex-direction: column;
    gap: 4px;
  }

  .page-about .data-scale-layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 36px;
    align-items: center;
  }

  .page-about .about-outro {
    margin-top: 80px;
  }
}