.page-about {
  --about-gold: linear-gradient(135deg, #F5D061 0%, #E8A33D 100%);
  --about-card-border: rgba(255, 255, 255, 0.1);
  --about-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  background:
    radial-gradient(ellipse at 20% 0%, rgba(155, 60, 255, 0.16) 0%, transparent 45%),
    radial-gradient(ellipse at 90% 20%, rgba(245, 208, 97, 0.08) 0%, transparent 40%),
    linear-gradient(180deg, var(--navy-deep) 0%, var(--deep-space-blue) 30%, var(--deep-space-blue) 100%);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

.page-about .container {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: 24px;
}

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

.page-about .mono-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: inline-block;
}

.page-about .about-hero {
  padding: 40px 0 32px;
  position: relative;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-start), var(--neon-purple), transparent 70%);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.page-about .breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a[aria-current="page"] {
  color: var(--gold-start);
}

.page-about .about-hero-inner {
  display: grid;
  gap: 32px;
}

.page-about .about-hero-title .mono-label {
  color: var(--neon-purple);
}

.page-about h1 {
  font-family: var(--font-head);
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin: 0 0 24px;
  background: var(--about-gold);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  max-width: 900px;
}

.page-about .about-hero-lead {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 820px;
  margin: 0;
}

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .hero-fact {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--about-card-border);
  border-radius: 16px;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  position: relative;
  overflow: hidden;
}

.page-about .hero-fact::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--about-gold);
}

.page-about .hero-fact-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-start);
}

.page-about .hero-fact-label {
  font-size: 14px;
  color: var(--text-muted);
}

.page-about .about-page-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-bottom: 72px;
}

.page-about .about-index {
  position: static;
  top: 0;
}

.page-about .about-index > .mono-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.page-about .about-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--border-line);
}

.page-about .about-index li {
  position: relative;
}

.page-about .about-index a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 16px;
  font-size: 15px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.page-about .about-index a .mono-label {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
}

.page-about .about-index a::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold-start);
  opacity: 0;
  transform: translateY(-50%);
  transition: opacity 0.2s ease;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--gold-start);
  background: rgba(245, 208, 97, 0.05);
}

.page-about .about-index a:hover::before,
.page-about .about-index a:focus-visible::before {
  opacity: 1;
}

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

.page-about .section {
  padding: 40px 0 56px;
  scroll-margin-top: 96px;
  border-bottom: 1px solid var(--border-line);
}

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

.page-about .section-header {
  margin-bottom: 32px;
}

.page-about .section-index {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--neon-purple);
  margin-bottom: 4px;
}

.page-about .section-title {
  font-family: var(--font-head);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 900;
  margin: 0 0 8px;
}

.page-about .section-desc {
  color: var(--text-muted);
  font-size: 15px;
  margin: 0;
}

.page-about .about-story-layout {
  display: grid;
  gap: 32px;
}

.page-about .about-story-text p {
  margin: 0 0 16px;
  color: var(--text-secondary);
}

.page-about .about-story-principles {
  display: grid;
  gap: 12px;
}

.page-about .principle-item {
  background: var(--bg-panel);
  border: 1px solid var(--about-card-border);
  border-radius: 16px;
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-about .principle-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--about-shadow);
  border-color: rgba(155, 60, 255, 0.45);
}

.page-about .principle-item .mono-label {
  color: var(--neon-purple);
  font-size: 12px;
  margin-bottom: 8px;
}

.page-about .principle-item h3 {
  font-family: var(--font-head);
  font-size: 18px;
  margin: 0 0 8px;
}

.page-about .principle-item p {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
}

.page-about .about-journey-figure,
.page-about .about-engine-figure,
.page-about .case-chart-figure {
  margin: 0 0 32px;
}

.page-about .about-journey-figure img,
.page-about .about-engine-figure img,
.page-about .case-chart-figure img {
  width: 100%;
  max-width: 100%;
  border-radius: 20px;
  display: block;
  object-fit: cover;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--gold-start) 0%, var(--neon-purple) 100%);
  opacity: 0.5;
}

.page-about .timeline-item {
  position: relative;
  padding-left: 40px;
  margin-bottom: 24px;
}

.page-about .timeline-dot {
  position: absolute;
  left: 0;
  top: 20px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--gold-start);
  background: var(--deep-space-blue);
  z-index: 1;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .timeline-item:hover .timeline-dot,
.page-about .timeline-item:focus-within .timeline-dot {
  background: var(--gold-start);
  box-shadow: 0 0 0 6px rgba(245, 208, 97, 0.2);
}

.page-about .timeline-meta {
  font-size: 13px;
  color: var(--gold-start);
  font-weight: 600;
  margin-bottom: 8px;
}

.page-about .timeline-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--about-card-border);
  border-radius: 16px;
  padding: 20px 24px;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .timeline-item:hover .timeline-card,
.page-about .timeline-item:focus-within .timeline-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(245, 208, 97, 0.4);
  box-shadow: var(--about-shadow);
}

.page-about .timeline-card h3 {
  font-family: var(--font-head);
  font-size: 16px;
  margin: 0 0 6px;
}

.page-about .timeline-card p {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
}

.page-about .capability-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.page-about .stat-card {
  background: linear-gradient(145deg, rgba(26, 58, 107, 0.7) 0%, rgba(11, 29, 58, 0.9) 100%);
  border: 1px solid var(--about-card-border);
  border-radius: 16px;
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.page-about .stat-card::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 208, 97, 0.15) 0%, transparent 70%);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  background: var(--about-gold);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: 1.1;
  display: block;
  margin-bottom: 8px;
}

.page-about .stat-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
  margin-bottom: 6px;
}

.page-about .stat-detail {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
}

.page-about .capability-meta {
  display: grid;
  gap: 20px;
  background: var(--bg-panel);
  border-radius: 16px;
  padding: 24px;
  border: 1px solid var(--about-card-border);
}

.page-about .capability-meta .mono-label {
  color: var(--text-muted);
  font-size: 12px;
  margin-bottom: 4px;
}

.page-about .capability-meta p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.page-about .honor-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 32px;
}

.page-about .honor-item {
  background: rgba(19, 41, 75, 0.5);
  border: 1px solid var(--about-card-border);
  border-left: 3px solid var(--neon-purple);
  border-radius: 12px;
  padding: 24px;
}

.page-about .honor-item:nth-child(2) {
  border-left-color: var(--gold-start);
}

.page-about .honor-item h3 {
  font-family: var(--font-head);
  font-size: 16px;
  margin: 0 0 8px;
}

.page-about .honor-item p {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
}

.page-about .case-filter-wrap {
  margin-top: 8px;
}

.page-about .case-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .filter-btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--bg-panel);
  border: 1px solid var(--border-line);
  color: var(--text-secondary);
  font-size: 14px;
  font-family: var(--font-body);
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-about .filter-btn:hover {
  border-color: var(--neon-purple);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.page-about .filter-btn.is-active {
  background: var(--neon-purple);
  border-color: var(--neon-purple);
  color: #ffffff;
}

.page-about .case-filter-wrap:has(.case-card:target) .filter-btn,
.page-about .case-filter-wrap:has(.cases-grid:target) .filter-btn {
  background: var(--bg-panel);
  border-color: var(--border-line);
  color: var(--text-secondary);
}

.page-about .case-filter-wrap:has(#case-ecommerce:target) .filter-btn[href="#case-ecommerce"],
.page-about .case-filter-wrap:has(#case-live:target) .filter-btn[href="#case-live"],
.page-about .case-filter-wrap:has(#case-sports:target) .filter-btn[href="#case-sports"],
.page-about .case-filter-wrap:has(#case-social:target) .filter-btn[href="#case-social"],
.page-about .case-filter-wrap:has(#case-media:target) .filter-btn[href="#case-media"],
.page-about .case-filter-wrap:has(.cases-grid:target) .filter-btn[href="#case-all"] {
  background: var(--neon-purple);
  border-color: var(--neon-purple);
  color: #ffffff;
}

.page-about .cases-grid {
  display: grid;
  gap: 24px;
}

.page-about .cases-grid:has(.case-card:target) .case-card {
  display: none;
}

.page-about .cases-grid:has(.case-card:target) .case-card:target {
  display: block;
}

.page-about .cases-grid:target .case-card {
  display: block;
}

.page-about .case-card {
  background: linear-gradient(145deg, rgba(19, 41, 75, 0.9) 0%, rgba(11, 29, 58, 0.85) 100%);
  border: 1px solid var(--about-card-border);
  border-radius: 20px;
  padding: 28px;
  scroll-margin-top: 100px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .case-card:target {
  border-color: var(--gold-start);
  box-shadow: 0 0 0 1px rgba(245, 208, 97, 0.3), var(--about-shadow);
}

.page-about .case-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.page-about .case-card-head h3 {
  font-family: var(--font-head);
  font-size: 18px;
  margin: 0;
}

.page-about .case-card-head .mono-label {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
}

.page-about .case-card > p {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0 0 20px;
}

.page-about .case-bars {
  display: grid;
  gap: 12px;
}

.page-about .case-bar-row {
  display: grid;
  grid-template-columns: 76px 1fr 52px;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.page-about .case-bar-label {
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.page-about .case-bar-track {
  display: block;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.page-about .case-bar-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--gold-start), var(--gold-end));
}

.page-about .case-bar-fill.purple {
  background: linear-gradient(90deg, var(--neon-purple), #c084fc);
}

.page-about .case-bar-value {
  text-align: right;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-weight: 600;
}

.page-about .about-cta {
  background: linear-gradient(135deg, var(--deep-space-blue-light) 0%, var(--deep-space-blue) 100%);
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  padding: 56px 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::before {
  content: "V8.0";
  position: absolute;
  font-family: var(--font-mono);
  font-size: clamp(80px, 16vw, 220px);
  font-weight: 700;
  color: rgba(245, 208, 97, 0.06);
  right: -20px;
  top: -30px;
  pointer-events: none;
  line-height: 1;
}

.page-about .about-cta .mono-label {
  color: var(--neon-purple);
  font-size: 12px;
}

.page-about .about-cta h2 {
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 900;
  margin: 0 0 12px;
}

.page-about .cta-keyword-link {
  color: var(--gold-start);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 208, 97, 0.4);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .cta-keyword-link:hover {
  border-color: var(--gold-start);
}

.page-about .about-cta p {
  color: var(--text-secondary);
  margin: 0 0 24px;
  max-width: 720px;
}

.page-about .about-cta p a {
  color: var(--gold-start);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 208, 97, 0.35);
  transition: border-color 0.2s ease;
}

.page-about .about-cta p a:hover {
  border-color: var(--gold-start);
}

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

.page-about .cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.page-about .cta-btn:hover {
  transform: translateY(-1px);
}

.page-about .cta-btn-primary {
  background: var(--neon-purple);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(155, 60, 255, 0.4);
}

.page-about .cta-btn-outline {
  border: 1px solid var(--border-line);
  color: var(--text-primary);
  background: transparent;
}

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

@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 64px 0 48px;
  }

  .page-about .about-hero-inner {
    gap: 40px;
  }

  .page-about .about-hero-facts {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

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

@media (min-width: 768px) {
  .page-about .about-story-layout {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .honor-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .page-about .capability-meta {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-page-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 120px;
    max-height: calc(100vh - 160px);
    overflow-y: auto;
  }

  .page-about .section {
    padding: 56px 0 72px;
  }

  .page-about .capability-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }
}