.page-about {
  --about-gold-glow: rgba(244, 182, 61, 0.35);
  --about-purple-glow: rgba(139, 92, 246, 0.3);
  --about-line: rgba(244, 182, 61, 0.2);
}

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

.page-about [id] {
  scroll-margin-top: 72px;
}

.page-about .about-hero {
  background:
    radial-gradient(ellipse 60% 80% at 20% 10%, rgba(139, 92, 246, 0.18), transparent 60%),
    radial-gradient(ellipse 40% 50% at 80% 20%, rgba(244, 182, 61, 0.1), transparent 60%),
    var(--color-space);
  color: var(--color-moon);
  padding: 112px 18px 40px;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 12% 28%, rgba(248, 250, 252, 0.9), transparent),
    radial-gradient(1px 1px at 31% 62%, rgba(248, 250, 252, 0.6), transparent),
    radial-gradient(1px 1px at 47% 20%, rgba(248, 250, 252, 0.7), transparent),
    radial-gradient(1px 1px at 64% 74%, rgba(248, 250, 252, 0.45), transparent),
    radial-gradient(1.5px 1.5px at 78% 36%, rgba(139, 92, 246, 0.8), transparent),
    radial-gradient(1px 1px at 88% 58%, rgba(248, 250, 252, 0.55), transparent);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(248, 250, 252, 0.6);
  margin-bottom: 40px;
}

.page-about .about-breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color 0.3s;
}

.page-about .about-breadcrumb a:hover {
  color: var(--color-gold-bright);
}

.page-about .about-breadcrumb-sep {
  color: rgba(248, 250, 252, 0.3);
}

.page-about .about-hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about .about-kicker {
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 0 0 12px;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(36px, 8vw, 64px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  color: var(--color-moon);
  text-shadow: 0 0 60px rgba(244, 182, 61, 0.25);
}

.page-about .about-hero-sub {
  font-size: 17px;
  color: rgba(248, 250, 252, 0.75);
  margin: 0 0 12px;
  font-weight: 400;
}

.page-about .about-hero-lead {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-gold);
  margin: 0 0 24px;
  letter-spacing: 0.02em;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-hero-figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  padding: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-hero-figure::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(244, 182, 61, 0.3);
  border-radius: 12px;
  pointer-events: none;
  z-index: 2;
}

.page-about .about-hero-figure::after {
  content: "E114.5° · N38.0°";
  position: absolute;
  right: 28px;
  top: 6px;
  font-size: 11px;
  color: var(--color-gold);
  background: rgba(11, 16, 38, 0.72);
  padding: 2px 8px;
  border-radius: 6px;
  z-index: 3;
  letter-spacing: 0.08em;
}

.page-about .about-hero-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 12px;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 40px 0 0;
  padding: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
}

.page-about .about-stat {
  padding: 12px 14px;
  border-left: 2px solid var(--color-gold);
  background: rgba(248, 250, 252, 0.03);
  border-radius: 8px;
}

.page-about .about-stat dt {
  font-size: 12px;
  color: rgba(248, 250, 252, 0.55);
  margin-bottom: 4px;
}

.page-about .about-stat dd {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  color: var(--color-moon);
}

.page-about .about-stat dd span {
  color: var(--color-gold);
  font-size: 28px;
  margin-right: 2px;
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.page-about .about-jump a {
  font-size: 13px;
  color: rgba(248, 250, 252, 0.75);
  text-decoration: none;
  padding: 8px 16px;
  border: 1px solid rgba(248, 250, 252, 0.14);
  border-radius: 999px;
  transition: all 0.3s;
}

.page-about .about-jump a:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
  background: rgba(244, 182, 61, 0.08);
}

.page-about .about-chapter {
  padding: 72px 18px;
  scroll-margin-top: 72px;
}

.page-about .about-chapter-content {
  max-width: var(--container-width);
  margin: 0 auto;
  position: relative;
}

.page-about .about-chapter-content::before {
  content: attr(data-chapter);
  display: block;
  font-size: 56px;
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px var(--color-gold);
  text-shadow: 0 0 32px var(--about-gold-glow);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.page-about .about-chapter h2 {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0 0 16px;
}

.page-about .about-section-desc {
  font-size: 16px;
  line-height: 1.8;
  max-width: 680px;
  margin: 0 0 32px;
}

.page-about .about-origin {
  background: var(--color-paper);
  color: var(--color-ink);
}

.page-about .about-origin .about-chapter-content::before {
  -webkit-text-stroke: 2px var(--color-purple);
  text-shadow: 0 0 32px var(--about-purple-glow);
}

.page-about .about-origin-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-origin-main p {
  line-height: 1.9;
  font-size: 16px;
  color: rgba(32, 32, 32, 0.85);
  margin: 0 0 18px;
}

.page-about .about-origin-main .about-lead {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.7;
}

.page-about .about-origin-main a {
  color: var(--color-purple);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-origin-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.page-about .about-fact-card {
  padding: 20px;
  background: var(--color-paper-light);
  border: 1px solid rgba(32, 32, 32, 0.08);
  border-radius: var(--radius);
}

.page-about .about-fact-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--color-purple);
  margin-bottom: 10px;
  font-weight: 700;
}

.page-about .about-fact-value {
  font-size: 28px;
  font-weight: 900;
  color: var(--color-ink);
  margin: 0 0 4px;
  letter-spacing: -0.02em;
}

.page-about .about-fact-label {
  font-size: 13px;
  color: rgba(32, 32, 32, 0.6);
  margin: 0;
}

.page-about .about-milestones {
  background:
    radial-gradient(ellipse 70% 50% at 80% 10%, rgba(139, 92, 246, 0.1), transparent 60%),
    var(--color-space);
  color: var(--color-moon);
}

.page-about .about-milestones .about-section-desc {
  color: rgba(248, 250, 252, 0.7);
}

.page-about .about-timeline-visual {
  max-width: var(--container-width);
  margin: 0 auto 16px;
}

.page-about .about-timeline-visual img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-timeline-track {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 8px 4px 24px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-milestone {
  flex: 0 0 276px;
  scroll-snap-align: start;
  padding: 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  position: relative;
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  right: 22px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-purple));
  border-radius: 2px;
  opacity: 0.75;
}

.page-about .about-milestone-year {
  font-size: 30px;
  font-weight: 900;
  color: var(--color-gold);
  letter-spacing: -0.01em;
  display: block;
  margin-bottom: 12px;
}

.page-about .about-milestone-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-moon);
  margin: 0 0 8px;
}

.page-about .about-milestone-card p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(248, 250, 252, 0.72);
  margin: 0;
}

.page-about .about-tip {
  margin-top: 12px;
}

.page-about .about-tip summary {
  cursor: pointer;
  font-size: 13px;
  color: var(--color-gold);
  list-style: none;
  padding: 4px 0;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-tip[open] summary {
  color: var(--color-gold-bright);
}

.page-about .about-tip p {
  font-size: 13px;
  margin-top: 8px;
  color: rgba(248, 250, 252, 0.6);
  background: rgba(255, 255, 255, 0.05);
  padding: 10px 12px;
  border-radius: 8px;
  border-left: 2px solid var(--color-gold);
}

.page-about .about-certification {
  background: var(--color-paper);
  color: var(--color-ink);
}

.page-about .about-certification .about-chapter-content::before {
  -webkit-text-stroke: 2px var(--color-purple);
  text-shadow: 0 0 32px var(--about-purple-glow);
}

.page-about .about-cert-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

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

.page-about .about-cert-card {
  padding: 24px;
  background: var(--color-paper-light);
  border: 1px solid rgba(32, 32, 32, 0.08);
  border-left: 4px solid var(--color-gold);
  border-radius: var(--radius-sm);
}

.page-about .about-cert-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.16);
  color: #6d28d9;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.page-about .about-cert-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--color-ink);
}

.page-about .about-cert-card p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(32, 32, 32, 0.76);
  margin: 0;
}

.page-about .about-cert-card a {
  color: var(--color-purple);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-cert-visual {
  margin: 0;
}

.page-about .about-cert-visual img {
  width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid rgba(32, 32, 32, 0.08);
  background: var(--color-paper-light);
}

.page-about .about-partners {
  background:
    radial-gradient(ellipse 60% 60% at 10% 90%, rgba(244, 182, 61, 0.08), transparent 60%),
    var(--color-space-deep);
  color: var(--color-moon);
}

.page-about .about-partners .about-section-desc {
  color: rgba(248, 250, 252, 0.72);
}

.page-about .about-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 28px;
}

.page-about .about-filter-btn {
  padding: 8px 18px;
  border: 1px solid rgba(248, 250, 252, 0.18);
  background: rgba(248, 250, 252, 0.05);
  color: var(--color-moon);
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
}

.page-about .about-filter-btn:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.page-about .about-filter-btn.is-active {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-ink);
  font-weight: 700;
}

.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-partner-card {
  padding: 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
}

.page-about .about-partner-type {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--color-purple-light);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.page-about .about-partner-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-moon);
  margin: 0 0 10px;
}

.page-about .about-partner-card p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(248, 250, 252, 0.72);
  margin: 0;
}

.page-about .about-team {
  background: var(--color-paper);
  color: var(--color-ink);
}

.page-about .about-team .about-chapter-content::before {
  -webkit-text-stroke: 2px var(--color-gold);
}

.page-about .about-team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-team-intro p {
  font-size: 16px;
  line-height: 1.9;
  color: rgba(32, 32, 32, 0.82);
  margin: 0 0 16px;
}

.page-about .about-team-intro a {
  color: var(--color-purple);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-team-groups {
  border-top: 2px solid rgba(32, 32, 32, 0.08);
}

.page-about .about-group-row {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(32, 32, 32, 0.08);
}

.page-about .about-group-num {
  flex: 0 0 36px;
  font-size: 18px;
  font-weight: 900;
  color: var(--color-purple);
  font-variant-numeric: tabular-nums;
}

.page-about .about-group-row h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--color-ink);
}

.page-about .about-group-row p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(32, 32, 32, 0.7);
  margin: 0;
}

.page-about .about-more {
  background:
    radial-gradient(ellipse 50% 80% at 80% 20%, rgba(139, 92, 246, 0.14), transparent 60%),
    var(--color-space-deep);
  color: var(--color-moon);
  padding: 72px 18px;
}

.page-about .about-more-inner {
  max-width: var(--container-width);
  margin: 0 auto;
}

.page-about .about-more h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  margin: 0 0 28px;
  color: var(--color-moon);
}

.page-about .about-more-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-more-links a {
  padding: 14px 24px;
  border: 1px solid rgba(248, 250, 252, 0.16);
  border-radius: 999px;
  color: var(--color-moon);
  text-decoration: none;
  font-size: 15px;
  transition: all 0.3s;
}

.page-about .about-more-links a:hover {
  background: var(--color-gold);
  color: var(--color-ink);
  border-color: var(--color-gold);
}

@media (min-width: 768px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
    padding: 24px;
  }

  .page-about .about-origin-facts {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-cert-layout {
    grid-template-columns: 1.4fr 0.6fr;
    align-items: center;
  }

  .page-about .about-cert-visual img {
    max-height: 520px;
    object-fit: cover;
  }

  .page-about .about-partner-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-team-layout {
    grid-template-columns: 0.8fr 1.2fr;
    align-items: start;
    gap: 48px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 128px 24px 64px;
  }

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

  .page-about .about-chapter {
    padding: 96px 24px;
  }

  .page-about .about-chapter-content {
    padding-left: 150px;
  }

  .page-about .about-chapter-content::before {
    position: absolute;
    left: 0;
    top: 4px;
    font-size: 104px;
    margin-bottom: 0;
  }

  .page-about .about-origin-layout {
    grid-template-columns: 1.6fr 0.8fr;
    gap: 56px;
  }

  .page-about .about-milestone {
    flex-basis: 300px;
  }

  .page-about .about-team-groups {
    padding-left: 32px;
  }
}