.page-about {
  color: var(--c-ink);
  background:
    radial-gradient(60% 50% at 85% -10%, rgba(138, 43, 226, 0.14), transparent 70%),
    linear-gradient(160deg, transparent 55%, rgba(255, 215, 0, 0.04) 55%),
    var(--c-bg);
  overflow: hidden;
  padding-bottom: clamp(56px, 8vw, 96px);
}

.page-about .breadcrumb {
  margin-top: 24px;
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.06em;
}

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

.page-about .breadcrumb__item {
  display: inline-flex;
  align-items: center;
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "·";
  margin-right: 8px;
  color: var(--c-muted);
}

.page-about .breadcrumb__link {
  color: var(--c-muted);
  text-decoration: none;
  transition: color var(--ease);
}

.page-about .breadcrumb__link:hover {
  color: var(--c-purple-soft);
}

.page-about .breadcrumb__current {
  color: var(--c-purple-soft);
}

.page-about .about-hero {
  position: relative;
  padding-top: clamp(40px, 8vw, 88px);
  padding-bottom: clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(138, 43, 226, 0.28), transparent 62%);
  border-radius: 50%;
  transform: translate(42%, -42%);
  pointer-events: none;
  animation: about-float 7s ease-in-out infinite alternate;
}

@keyframes about-float {
  from {
    transform: translate(42%, -42%) scale(0.94);
  }
  to {
    transform: translate(30%, -28%) scale(1.08);
  }
}

.page-about .about-hero__kicker {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-purple-soft);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--c-gold);
  box-shadow: 0 0 8px rgba(255, 215, 0, 0.5);
}

.page-about .about-hero__title {
  position: relative;
  margin: 0 0 22px 0;
  max-width: 15em;
  font-family: var(--font-sans);
  font-size: clamp(28px, 4.6vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--c-white);
}

.page-about .about-hero__lede {
  position: relative;
  max-width: 54em;
  margin: 0 0 28px 0;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--c-purple-soft);
}

.page-about .about-hero__meta {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
}

.page-about .about-hero__meta .tag-chip {
  font-family: var(--font-sans);
  font-size: 13px;
  margin: 0;
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
  padding-top: clamp(40px, 7vw, 80px);
}

.page-about .about-toc {
  font-family: var(--font-sans);
  border-left: 1px solid var(--c-line);
  padding-left: 18px;
}

.page-about .about-toc__label {
  margin: 0 0 16px 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.page-about .about-toc__list a {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  color: var(--c-ink);
  text-decoration: none;
  transition: color var(--ease);
}

.page-about .about-toc__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--c-purple);
  transform: translateY(-50%);
  opacity: 0.65;
}

.page-about .about-toc__list a:hover {
  color: var(--c-gold);
}

.page-about .about-content {
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: 28px;
  margin-bottom: clamp(40px, 6vw, 72px);
  padding-bottom: clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-section__index {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-gold);
}

.page-about .about-section__title {
  margin: 0 0 16px 0;
  font-family: var(--font-sans);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--c-white);
}

.page-about .about-section__intro {
  max-width: 46em;
  margin: 0 0 28px 0;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-purple-soft);
}

.page-about .about-section__note {
  margin: 24px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--c-purple);
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-muted);
}

.page-about .about-who__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  margin-bottom: 28px;
}

.page-about .about-who__text p {
  margin: 0 0 16px 0;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.88;
  color: var(--c-ink);
}

.page-about .about-who__visual {
  display: flex;
  justify-content: center;
  padding: 22px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at center, rgba(138, 43, 226, 0.2), rgba(10, 14, 39, 0.72));
}

.page-about .about-who__visual svg {
  display: block;
  width: 220px;
  height: 220px;
}

.page-about .about-badges {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 28px 0 32px;
}

.page-about .about-badge {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  transition: transform var(--ease), border-color var(--ease);
}

.page-about .about-badge:hover {
  transform: translateY(-4px);
  border-color: var(--c-purple);
}

.page-about .about-badge__num {
  font-family: var(--font-sans);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 900;
  color: var(--c-gold);
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.28);
}

.page-about .about-badge__label {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--c-muted);
}

.page-about .about-figure {
  position: relative;
  margin: 28px 0 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-card);
}

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

.page-about .about-figure--tall {
  height: clamp(320px, 52vh, 460px);
  margin-top: 32px;
}

.page-about .about-figure--tall img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.page-about .about-timeline {
  position: relative;
  margin: 36px 0 16px;
  padding-left: 22px;
  border-left: 1px solid var(--c-line);
}

.page-about .about-timeline__node {
  position: relative;
  overflow: hidden;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm) var(--radius-md) var(--radius-md) var(--radius-sm);
  transition: border-color var(--ease);
}

.page-about .about-timeline__node:hover {
  border-color: rgba(138, 43, 226, 0.6);
}

.page-about .about-timeline__node + .about-timeline__node {
  margin-top: 14px;
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 20px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-purple), var(--c-gold));
  box-shadow: 0 0 14px rgba(138, 43, 226, 0.7);
}

.page-about .about-timeline__toggle {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 12px;
  width: 100%;
  padding: 15px 16px;
  border: 0;
  background: none;
  font-family: var(--font-sans);
  text-align: left;
  cursor: pointer;
  color: var(--c-white);
}

.page-about .about-timeline__toggle::after {
  content: "−";
  margin-left: auto;
  font-size: 18px;
  line-height: 1;
  color: var(--c-purple-soft);
}

.page-about .about-timeline__node:not([data-open]) .about-timeline__toggle::after {
  content: "+";
  color: var(--c-purple);
}

.page-about .about-timeline__range {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-timeline__period {
  padding: 3px 10px;
  border: 1px solid rgba(255, 215, 0, 0.36);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-gold);
}

.page-about .about-timeline__body {
  padding: 0 16px 16px;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .about-timeline__node:not([data-open]) .about-timeline__body {
  display: none;
}

.page-about .about-timeline__node[data-open] .about-timeline__body {
  display: block;
}

.page-about .about-library-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 28px 0 12px;
}

.page-about .about-library-card {
  padding: 20px 18px;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  transition: transform var(--ease), border-color var(--ease);
}

.page-about .about-library-card:hover {
  transform: translateY(-3px);
  border-color: var(--c-purple);
}

.page-about .about-library-card__code {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--c-gold);
}

.page-about .about-library-card h3 {
  margin: 0 0 8px 0;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  color: var(--c-white);
}

.page-about .about-library-card p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

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

.page-about .about-shield {
  display: flex;
  justify-content: center;
  padding: 28px 16px;
  background: radial-gradient(circle at center, rgba(18, 26, 58, 0.85), rgba(10, 14, 39, 0.6));
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
}

.page-about .about-shield svg {
  display: block;
  width: 200px;
  height: 240px;
  animation: about-shield-turn 8s ease-in-out infinite alternate;
}

@keyframes about-shield-turn {
  from {
    transform: rotate(-4deg) scale(0.97);
  }
  to {
    transform: rotate(4deg) scale(1.03);
  }
}

.page-about .about-compliance-copy p {
  margin: 0 0 16px 0;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.88;
  color: var(--c-ink);
}

.page-about .about-compliance-copy p:last-child {
  margin-bottom: 0;
}

.page-about .about-compliance-copy a {
  color: var(--c-purple-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--ease);
}

.page-about .about-compliance-copy a:hover {
  color: var(--c-gold);
}

@media (min-width: 640px) {
  .page-about .about-badges {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-library-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: 200px minmax(0, 860px);
    justify-content: center;
    gap: clamp(48px, 7vw, 80px);
  }

  .page-about .about-toc {
    position: sticky;
    top: 32px;
    align-self: start;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    gap: 14px;
  }

  .page-about .about-toc__list a {
    font-size: 15px;
  }

  .page-about .about-who__grid {
    grid-template-columns: minmax(0, 1.2fr) 320px;
    gap: 48px;
  }

  .page-about .about-who__visual svg {
    width: 260px;
    height: 260px;
  }

  .page-about .about-figure--tall {
    height: 520px;
  }

  .page-about .about-compliance-wrap {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 48px;
  }
}