.page-about {
  --about-grid-line: rgba(240, 244, 248, 0.07);
  --about-panel-bg: rgba(255, 255, 255, 0.04);
  --about-border: rgba(240, 244, 248, 0.22);
  --about-gold: var(--c-gold);
  --about-teal: var(--c-teal);
  background: var(--c-primary);
  color: var(--c-text-on-dark);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding: 16px 0;
  background: var(--c-primary);
  border-bottom: 1px solid var(--c-border-dark);
}

.page-about .breadcrumb-inner {
  display: flex;
  align-items: center;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.page-about .breadcrumb ol li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-muted);
}

.page-about .breadcrumb a {
  color: var(--c-teal);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--c-accent);
}

.page-about .breadcrumb .breadcrumb-current {
  color: var(--c-muted);
}

.page-about .about-hero {
  position: relative;
  padding: 48px 0 72px;
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 107, 53, 0.18), transparent 40%),
    linear-gradient(180deg, rgba(0, 194, 168, 0.1), transparent 30%),
    var(--c-primary);
  border-bottom: 2px solid var(--c-accent);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-hero-main {
  min-width: 0;
}

.page-about .about-hero-main .section-index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  border: 1px solid var(--c-border-strong);
  background: rgba(0, 0, 0, 0.25);
  color: var(--c-muted);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  margin-bottom: 24px;
}

.page-about .about-hero-main h1 {
  font-family: var(--font-heading);
  font-size: clamp(38px, 7vw, 72px);
  line-height: 0.98;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin: 0 0 10px;
  color: var(--c-text-on-dark);
}

.page-about .about-hero-subtitle {
  font-family: var(--font-heading);
  font-size: clamp(20px, 3.4vw, 34px);
  line-height: 1.15;
  color: var(--c-accent);
  margin: 0 0 18px;
}

.page-about .about-hero-desc {
  max-width: 560px;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.75;
  margin: 0 0 32px;
}

.page-about .about-hero-numbers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
  max-width: 560px;
}

.page-about .about-stat {
  border: 1px solid var(--c-border-dark);
  border-top: 2px solid var(--c-gold);
  background: rgba(255, 255, 255, 0.03);
  padding: 14px 12px 12px;
  box-shadow: var(--shadow-card);
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-gold);
  line-height: 1.1;
  margin-bottom: 6px;
}

.page-about .about-stat-label {
  font-size: 12px;
  color: var(--c-muted);
  line-height: 1.35;
}

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

.page-about .about-hero-tags .tag {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-about .about-hero-art {
  position: relative;
  margin: 0;
  border: 2px solid var(--c-border-strong);
  box-shadow: var(--shadow-strong);
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--c-dark-teal);
}

.page-about .about-hero-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(0.3) contrast(1.1);
}

.page-about .about-hero-art::after {
  content: "FENGYUN // ARCHIVE";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  background: rgba(11, 30, 59, 0.78);
  color: var(--c-text-on-dark);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.page-about .about-exhibit {
  position: relative;
  padding: 56px 0 64px;
  border-bottom: 1px solid var(--c-border-dark);
}

.page-about .about-exhibit::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(240, 244, 248, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(240, 244, 248, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

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

.page-about .section-head {
  margin-bottom: 32px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--c-accent);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .section-index {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-teal);
  text-transform: uppercase;
}

.page-about .section-title {
  font-family: var(--font-heading);
  font-size: clamp(26px, 4vw, 40px);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0;
  color: var(--c-text-on-dark);
}

.page-about .section-desc {
  margin: 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.6;
  max-width: 680px;
}

.page-about .about-origin-grid {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-about .about-origin-copy p {
  color: var(--c-text-on-dark);
  font-size: 15px;
  line-height: 1.8;
  opacity: 0.88;
  margin: 0 0 16px;
}

.page-about .about-origin-copy p:last-of-type {
  margin-bottom: 24px;
}

.page-about .about-origin-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-origin-card {
  border: 2px solid var(--c-border-strong);
  background: var(--about-panel-bg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  align-self: start;
}

.page-about .about-origin-card-label {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-gold);
  text-transform: uppercase;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-border-dark);
}

.page-about .about-origin-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.page-about .about-origin-list li {
  position: relative;
  padding: 8px 0 8px 22px;
  color: var(--c-text-on-dark);
  font-size: 15px;
  border-bottom: 1px dashed var(--c-border-dark);
}

.page-about .about-origin-list li::before {
  content: "◆";
  position: absolute;
  left: 2px;
  top: 8px;
  color: var(--c-accent);
  font-size: 10px;
}

.page-about .about-timeline-grid {
  display: grid;
  gap: 40px;
  align-items: start;
  margin-top: 16px;
}

.page-about .about-timeline {
  position: relative;
}

.page-about .timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  padding-bottom: 30px;
}

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

.page-about .timeline-item:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 30px;
  bottom: 0;
  width: 2px;
  background: rgba(255, 215, 0, 0.35);
}

.page-about .timeline-node {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

.page-about .timeline-body {
  min-width: 0;
}

.page-about .timeline-body:focus {
  outline: none;
}

.page-about .timeline-body:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 4px;
}

.page-about .timeline-year {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--c-gold);
  font-weight: 700;
  background: rgba(255, 215, 0, 0.08);
  border: 1px solid rgba(255, 215, 0, 0.35);
  padding: 2px 8px;
  margin-bottom: 8px;
}

.page-about .timeline-title {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 700;
  color: var(--c-text-on-dark);
  margin: 0 0 6px;
}

.page-about .timeline-text {
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

.page-about .timeline-detail {
  color: var(--c-teal);
  font-size: 13px;
  line-height: 1.55;
  margin: 0;
  max-height: none;
}

.page-about .about-timeline-figure {
  margin: 0;
  border: 2px solid var(--c-border-strong);
  box-shadow: var(--shadow-card);
}

.page-about .about-fig-note {
  padding: 10px 14px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-muted);
  background: rgba(255, 255, 255, 0.05);
  border-top: 1px solid var(--c-border-dark);
}

.page-about .about-team-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0 0 40px;
}

.page-about .about-metric {
  border: 1px solid var(--c-border-dark);
  border-top: 2px solid var(--c-accent);
  background: rgba(255, 255, 255, 0.03);
  padding: 16px 12px 14px;
  text-align: center;
}

.page-about .about-team-grid {
  display: grid;
  gap: 16px;
}

.page-about .about-dept {
  border: 1px solid var(--c-border-strong);
  background: rgba(255, 255, 255, 0.04);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

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

.page-about .about-dept svg {
  color: var(--c-teal);
  margin-bottom: 16px;
  display: block;
}

.page-about .about-dept-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text-on-dark);
  margin: 0 0 8px;
}

.page-about .about-dept-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-muted);
  margin: 0;
}

.page-about .about-cert-grid {
  display: grid;
  gap: 16px;
}

.page-about .about-cert-item {
  position: relative;
  border: 2px solid var(--c-border-strong);
  background: rgba(255, 255, 255, 0.04);
  padding: 28px 24px 24px;
  box-shadow: var(--shadow-card);
}

.page-about .about-cert-item::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-top: 3px solid var(--c-gold);
  border-right: 3px solid var(--c-gold);
}

.page-about .about-cert-no {
  display: block;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--c-accent);
  letter-spacing: 0.14em;
  margin-bottom: 12px;
}

.page-about .about-cert-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text-on-dark);
  margin: 0 0 10px;
}

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

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

.page-about .about-partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-partner-list li {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--c-border-dark);
}

.page-about .about-partner-list li:first-child {
  padding-top: 0;
}

.page-about .about-partner-icon {
  flex: 0 0 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--c-accent);
  color: var(--c-accent);
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 18px;
  background: rgba(255, 107, 53, 0.08);
  box-shadow: 3px 3px 0 rgba(255, 107, 53, 0.2);
}

.page-about .about-partner-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-text-on-dark);
  margin: 0 0 6px;
}

.page-about .about-partner-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-muted);
  margin: 0;
}

.page-about .about-partner-figure {
  margin: 0;
  border: 2px solid var(--c-border-strong);
  box-shadow: var(--shadow-strong);
}

.page-about .about-honor-grid {
  display: grid;
  gap: 20px;
}

.page-about .about-honor {
  position: relative;
  border: 2px solid var(--c-border-strong);
  background: rgba(255, 255, 255, 0.05);
  padding: 32px 24px 28px;
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
  box-shadow: var(--shadow-card);
}

.page-about .about-honor::before {
  content: "★";
  position: absolute;
  right: 16px;
  top: 14px;
  color: var(--c-gold);
  font-size: 18px;
}

.page-about .about-honor-year {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 26px;
  font-weight: 700;
  color: var(--c-gold);
  line-height: 1;
  margin-bottom: 14px;
}

.page-about .about-honor-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text-on-dark);
  margin: 0 0 10px;
}

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

.page-about .about-cta {
  padding: 72px 0;
  background:
    radial-gradient(circle at 10% 20%, rgba(255, 107, 53, 0.18), transparent 40%),
    linear-gradient(135deg, rgba(0, 194, 168, 0.08), transparent 60%),
    var(--c-primary);
  border-top: 2px solid var(--c-accent);
}

.page-about .about-cta-inner {
  text-align: center;
}

.page-about .about-cta .section-index {
  margin-bottom: 12px;
}

.page-about .about-cta-inner .section-title {
  font-size: clamp(26px, 5vw, 42px);
  margin-bottom: 12px;
}

.page-about .about-cta-desc {
  max-width: 620px;
  margin: 0 auto 28px;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

@media (min-width: 760px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about .about-honor-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}

@media (min-width: 860px) {
  .page-about .about-origin-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
  }

  .page-about .about-hero {
    padding: 72px 0 96px;
  }

  .page-about .about-hero-main h1 {
    font-size: 68px;
  }

  .page-about .about-timeline-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
  }

  .page-about .timeline-detail {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.35s ease, margin-top 0.35s ease;
  }

  .page-about .timeline-item:hover .timeline-detail,
  .page-about .timeline-item:focus-within .timeline-detail {
    max-height: 120px;
    opacity: 1;
    margin-top: 6px;
  }

  .page-about .about-partner-grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }
}