.page-about {
  --about-line: rgba(232, 237, 242, 0.14);
  --about-line-soft: rgba(232, 237, 242, 0.06);
  --about-teal-bg: #0F3A42;
  --about-teal-deep: #0C2026;
  --about-index-w: 252px;
  min-height: 100vh;
  padding: 24px 16px 88px;
  background:
    radial-gradient(1180px 520px at 84% -8%, rgba(20, 75, 82, 0.58), transparent 64%),
    linear-gradient(180deg, var(--hy-bg) 0%, var(--about-teal-deep) 44%, var(--hy-bg) 100%);
  color: var(--hy-text);
}

.page-about a {
  color: var(--hy-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 178, 230, 0.28);
  transition: color 0.22s ease, border-color 0.22s ease;
}

.page-about a:hover {
  color: var(--hy-orange);
  border-color: rgba(242, 107, 33, 0.34);
}

.page-about .hy-btn {
  border-bottom: 0;
}

.page-about__shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  max-width: 1440px;
  margin: 0 auto;
}

.page-about__main {
  min-width: 0;
}

.page-about__breadcrumb {
  margin-bottom: 18px;
}

.page-about__index {
  position: relative;
  padding: 20px;
  background: rgba(18, 26, 33, 0.9);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--hy-orange);
}

.page-about__index-head {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--about-line);
  margin-bottom: 14px;
}

.page-about__index-brand-mark {
  display: inline-block;
  padding: 4px 9px 4px 8px;
  background: var(--hy-orange);
  color: var(--hy-bg);
  font-family: var(--hy-font-mono);
  font-size: 0.95rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  clip-path: polygon(0 0, 100% 0, 94% 100%, 6% 100%);
}

.page-about__index-caption {
  font-size: 1rem;
  font-weight: 700;
  color: var(--hy-text);
  margin: 8px 0 0;
}

.page-about__index-sub {
  font-family: var(--hy-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--hy-muted);
}

.page-about__index-nav ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about__index-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-bottom: 1px solid transparent;
  color: var(--hy-body);
  font-size: 0.92rem;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-about__index-nav a:hover {
  color: var(--hy-text);
  border-color: rgba(255, 166, 107, 0.36);
  background: rgba(255, 166, 107, 0.06);
}

.page-about__index-sid {
  font-family: var(--hy-font-mono);
  font-size: 0.74rem;
  color: var(--hy-orange);
}

.page-about__index-foot {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--about-line);
}

.page-about__archive {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: center;
  padding: clamp(24px, 5vw, 52px);
  background: linear-gradient(130deg, rgba(20, 75, 82, 0.74) 0%, rgba(10, 14, 18, 0.84) 62%, rgba(18, 26, 33, 0.9) 100%);
  border: 1px solid rgba(232, 237, 242, 0.14);
  border-left: 4px solid var(--hy-orange);
  overflow: hidden;
}

.page-about__archive::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 20%;
  height: 4px;
  background: var(--hy-blue);
  clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%);
}

.page-about__archive-main {
  min-width: 0;
}

.page-about__kicker {
  font-family: var(--hy-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--hy-orange);
  margin: 0 0 10px;
}

.page-about__title {
  font-family: var(--hy-font-sans);
  font-size: clamp(2.7rem, 6vw, 5.4rem);
  font-weight: 200;
  line-height: 1.06;
  letter-spacing: 0.01em;
  margin: 0 0 0.24em;
  color: var(--hy-text);
}

.page-about__lead {
  font-size: clamp(1.1rem, 1.8vw, 1.35rem);
  line-height: 1.6;
  color: var(--hy-orange-soft);
  margin: 0 0 12px;
}

.page-about__summary {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--hy-body);
  margin: 0;
  max-width: 44em;
}

.page-about__archive-visual {
  margin: 0;
  border: 1px solid rgba(232, 237, 242, 0.14);
  background: rgba(10, 14, 18, 0.34);
  padding: 10px;
}

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

.page-about__archive-visual img {
  width: 100%;
  height: auto;
}

.page-about figcaption {
  font-family: var(--hy-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--hy-muted);
  padding: 10px 2px 0;
}

.page-about__section {
  scroll-margin-top: calc(var(--hy-top-h) + var(--hy-nav-h) + 18px);
  margin-top: clamp(54px, 8vw, 96px);
  padding-top: clamp(26px, 4vw, 46px);
  border-top: 1px solid var(--about-line);
}

.page-about__section-head {
  margin-bottom: 22px;
}

.page-about__section-title {
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  font-weight: 900;
  letter-spacing: 0.01em;
  line-height: 1.2;
  margin: 0;
  color: var(--hy-text);
}

.page-about__section-body p,
.page-about__data-desc p,
.page-about__data-source p,
.page-about__editorial-copy p,
.page-about__compliance-panel p {
  line-height: 1.78;
  color: var(--hy-body);
  margin: 0 0 14px;
}

.page-about__fact-list {
  list-style: none;
  margin: 22px 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about__fact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  line-height: 1.7;
  color: var(--hy-body);
  background: rgba(18, 26, 33, 0.5);
  border: 1px solid var(--about-line-soft);
  padding: 12px 14px;
}

.page-about__fact-list .hy-tag {
  flex: 0 0 auto;
  margin-top: 3px;
}

.page-about__data-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  margin-top: 10px;
}

.page-about__chart {
  max-width: 340px;
  margin: 0 auto;
}

.page-about__ring {
  display: block;
  width: 100%;
  height: auto;
}

.page-about__ring-seg {
  stroke: rgba(10, 14, 18, 0.72);
  stroke-width: 2;
  transition: opacity 0.25s ease;
}

.page-about__ring-seg:hover {
  opacity: 0.88;
}

.page-about__ring-base {
  fill: none;
  stroke: var(--hy-bg);
  stroke-width: 3;
}

.page-about__data-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about__stat {
  position: relative;
  padding: 18px 16px 16px;
  background: rgba(18, 26, 33, 0.64);
  border: 1px solid rgba(106, 169, 255, 0.18);
}

.page-about__stat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background: var(--hy-orange);
}

.page-about__stat:nth-child(even)::before {
  background: var(--hy-blue);
}

.page-about__stat-num {
  display: block;
  font-family: var(--hy-font-mono);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--hy-text);
}

.page-about__stat-unit {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.88rem;
  color: var(--hy-muted);
}

.page-about__data-desc {
  margin-top: 30px;
}

.page-about__data-source {
  margin-top: 18px;
  padding: 14px 16px;
  background: rgba(20, 75, 82, 0.24);
  border: 1px solid rgba(20, 75, 82, 0.5);
}

.page-about__data-source p {
  margin: 0;
}

.page-about__collapse {
  margin-top: 22px;
}

.page-about .hy-collapse__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  background: rgba(18, 26, 33, 0.72);
  border: 1px solid var(--about-line);
  color: var(--hy-text);
  font-family: var(--hy-font-sans);
  font-size: 0.96rem;
  font-weight: 500;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.22s ease, background 0.22s ease;
}

.page-about .hy-collapse__trigger:hover {
  border-color: rgba(242, 107, 33, 0.42);
  background: rgba(30, 42, 51, 0.8);
}

.page-about .hy-collapse__panel {
  border: 1px solid var(--about-line);
  border-top: 0;
  background: rgba(10, 14, 18, 0.42);
}

.page-about .hy-collapse__inner {
  padding: 16px 18px 20px;
}

.page-about .hy-collapse__inner h3 {
  font-size: 1rem;
  font-weight: 900;
  margin: 0 0 8px;
  color: var(--hy-text);
}

.page-about .hy-collapse__inner p {
  line-height: 1.72;
  color: var(--hy-body);
  margin: 0;
}

.page-about__collapse-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  background: var(--hy-blue);
  transition: transform 0.25s ease, background 0.25s ease;
}

.page-about .hy-collapse__trigger[aria-expanded="true"] .page-about__collapse-dot {
  background: var(--hy-orange);
  transform: rotate(45deg);
}

.page-about__timeline-media {
  margin: 30px 0 8px;
  border: 1px solid rgba(232, 237, 242, 0.14);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 86%, 4% 100%);
}

.page-about__timeline-media img {
  width: 100%;
  height: auto;
}

.page-about__timeline {
  position: relative;
  list-style: none;
  margin: 36px 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid rgba(232, 237, 242, 0.22);
}

.page-about__milestone {
  position: relative;
  padding: 0 0 36px 18px;
  border-bottom: 1px solid rgba(232, 237, 242, 0.07);
}

.page-about__milestone:last-child {
  border-bottom: 0;
  padding-bottom: 2px;
}

.page-about__milestone::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--hy-blue);
  transform: rotate(45deg);
}

.page-about__milestone-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-about__milestone-year {
  font-family: var(--hy-font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  padding: 6px 0 0;
  color: var(--hy-orange);
  border-top: 3px solid var(--hy-orange);
}

.page-about__milestone-ver {
  font-family: var(--hy-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--hy-blue);
  border: 1px solid rgba(0, 178, 230, 0.38);
  padding: 3px 8px 2px;
}

.page-about__milestone-body h3 {
  font-size: 1.06rem;
  font-weight: 900;
  margin: 10px 0 4px;
  color: var(--hy-text);
}

.page-about__milestone-body p {
  line-height: 1.7;
  color: var(--hy-body);
  margin: 0;
}

.page-about__timeline-actions {
  margin-top: 26px;
}

.page-about__timeline .hy-collapse {
  margin-top: 26px;
}

.page-about__editorial-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.page-about__editorial-media {
  margin: 0;
  border: 1px solid rgba(232, 237, 242, 0.14);
  overflow: hidden;
  clip-path: polygon(4% 0, 100% 0, 100% 100%, 0 92%);
}

.page-about__editorial-media img {
  width: 100%;
  height: auto;
}

.page-about__editorial-copy {
  align-self: center;
}

.page-about__team-list {
  margin-top: 30px;
  border-bottom: 1px solid var(--about-line);
}

.page-about__team-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 0;
  border-top: 1px solid var(--about-line-soft);
}

.page-about__team-code {
  font-family: var(--hy-font-mono);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--hy-orange);
}

.page-about__team-body h3 {
  font-size: 1.04rem;
  font-weight: 900;
  margin: 0 0 4px;
  color: var(--hy-text);
}

.page-about__team-body p {
  line-height: 1.7;
  color: var(--hy-body);
  margin: 0;
}

.page-about__review-block {
  margin-top: 30px;
  padding: 20px 18px;
  background: rgba(20, 75, 82, 0.2);
  border: 1px solid rgba(20, 75, 82, 0.48);
}

.page-about__review-block h3 {
  font-size: 1.02rem;
  font-weight: 900;
  margin: 0 0 12px;
  color: var(--hy-text);
}

.page-about__review {
  list-style: none;
  counter-reset: review;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about__review li {
  counter-increment: review;
  display: flex;
  align-items: baseline;
  gap: 12px;
  line-height: 1.65;
  color: var(--hy-body);
}

.page-about__review li::before {
  content: counter(review, decimal-leading-zero);
  font-family: var(--hy-font-mono);
  font-size: 0.8rem;
  color: var(--hy-blue);
}

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

.page-about__plain-list li {
  position: relative;
  padding-left: 16px;
  line-height: 1.65;
  color: var(--hy-body);
}

.page-about__plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--hy-blue);
  transform: rotate(45deg);
}

.page-about__section-link {
  margin-top: 22px;
  line-height: 1.7;
  color: var(--hy-body);
}

.page-about__compliance-panel {
  padding: clamp(20px, 4vw, 34px);
  background:
    repeating-linear-gradient(-45deg, rgba(232, 237, 242, 0.012) 0 1px, transparent 1px 14px),
    rgba(12, 31, 38, 0.64);
  border: 1px solid rgba(232, 237, 242, 0.14);
  margin-top: 12px;
}

.page-about__badge-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 28px 0 8px;
}

.page-about__badge {
  padding: 18px 16px;
  background: rgba(10, 14, 18, 0.42);
  border: 1px solid rgba(106, 169, 255, 0.2);
  border-top: 3px solid var(--hy-orange);
}

.page-about__badge:nth-child(even) {
  border-top-color: var(--hy-blue);
}

.page-about__badge-key {
  display: block;
  font-family: var(--hy-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--hy-muted);
  margin-bottom: 8px;
}

.page-about__badge strong {
  display: block;
  font-size: 1.5rem;
  font-weight: 900;
  line-height: 1.15;
  color: var(--hy-text);
}

.page-about__badge p {
  margin: 8px 0 0;
  font-size: 0.86rem;
  color: var(--hy-body);
}

.page-about__subhead {
  font-size: 1.06rem;
  font-weight: 900;
  margin: 30px 0 10px;
  color: var(--hy-text);
}

.page-about__plain-list--split {
  display: grid;
  gap: 10px;
}

.page-about__outro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--about-line);
}

.page-about__outro-note {
  margin: 0;
  font-family: var(--hy-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--hy-muted);
}

@media (max-width: 479px) {
  .page-about {
    padding-left: 12px;
    padding-right: 12px;
  }

  .page-about__stat-num {
    font-size: 1.45rem;
  }

  .page-about__timeline {
    padding-left: 18px;
  }

  .page-about__milestone {
    padding-left: 14px;
  }
}

@media (min-width: 680px) {
  .page-about__data-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about__team-row {
    grid-template-columns: 96px minmax(0, 1fr);
  }

  .page-about__editorial-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about__badge-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about__plain-list--split {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about__archive-visual {
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
  }
}

@media (min-width: 1024px) {
  .page-about {
    padding: 32px 28px 96px;
  }

  .page-about__shell {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 68px);
    align-items: start;
  }

  .page-about__index {
    position: sticky;
    top: calc(var(--hy-top-h) + var(--hy-nav-h) + 20px);
    margin-top: 6px;
  }

  .page-about__index-nav ol {
    flex-direction: column;
    gap: 0;
  }

  .page-about__index-nav a {
    padding: 12px 8px;
  }

  .page-about__archive {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.9fr);
    gap: 34px;
  }

  .page-about__archive-visual {
    max-width: none;
  }

  .page-about__data-wrap {
    grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
  }

  .page-about__chart {
    margin: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about a,
  .page-about .hy-collapse__trigger,
  .page-about__collapse-dot,
  .page-about__ring-seg {
    transition: none;
  }
}