.page-about {
  --about-accent-gold: var(--accent-gold);
  --about-accent-cyan: var(--accent-cyan);
  --about-deep: var(--bg-deep);
  --about-elevated: var(--bg-elevated);
  --about-text: var(--text-primary);
  --about-text-secondary: var(--text-secondary);
  --about-gold-deep: #d4a62f;
  --about-cyan-soft: rgba(0, 229, 255, 0.12);
  --about-gold-soft: rgba(245, 197, 66, 0.16);
  --about-radius-panel: var(--radius-lg);
  --about-radius-card: var(--radius-md);
  position: relative;
  overflow-x: hidden;
  background:
    radial-gradient(1200px 800px at 85% 0%, rgba(0, 229, 255, 0.08), transparent 60%),
    radial-gradient(900px 600px at 10% 30%, rgba(245, 197, 66, 0.06), transparent 55%),
    linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-deep) 45%, #03050f 100%);
}

.page-about .container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.page-about .section {
  padding: 4.5rem 0;
}

.page-about .section--tight {
  padding: 3.5rem 0;
}

.page-about .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-text-secondary);
  margin-bottom: 0.875rem;
}

.page-about .eyebrow::before {
  content: "";
  width: 2rem;
  height: 1px;
  background: currentColor;
  opacity: 0.5;
}

.page-about .eyebrow--gold {
  color: var(--about-accent-gold);
}

.page-about .eyebrow--gold::before {
  background: var(--about-accent-gold);
  opacity: 0.7;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--about-text-secondary);
  margin-bottom: 1.75rem;
}

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

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

.page-about .breadcrumb [aria-current="page"] {
  color: var(--about-accent-gold);
  font-weight: 600;
}

.page-about .display-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--about-text);
  margin: 0 0 1.25rem;
  text-shadow: 0 2px 40px rgba(0, 229, 255, 0.12);
}

.page-about .lead {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--about-text-secondary);
  max-width: 42rem;
}

.page-about .h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--about-text);
  margin: 0 0 1rem;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.page-about .btn--primary {
  background: var(--about-accent-gold);
  color: #0a0e27;
  box-shadow: var(--shadow-gold);
}

.page-about .btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(245, 197, 66, 0.4);
}

.page-about .btn--ghost {
  border: 1px solid rgba(0, 229, 255, 0.5);
  color: var(--about-accent-cyan);
  background: transparent;
}

.page-about .btn--ghost:hover {
  border-color: var(--about-accent-cyan);
  box-shadow: var(--shadow-cyan);
  transform: translateY(-2px);
}

.page-about .tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--about-text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--divider);
}

.page-about .tag--status {
  color: var(--success);
}

.page-about .tag--status::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: about-pulse 2s ease-in-out infinite;
}

/* Hero */
.page-about .about-hero {
  position: relative;
  padding: 5rem 0 4rem;
}

.page-about .about-hero__glow {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 197, 66, 0.2), transparent 65%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding-right: 1.25rem;
  padding-left: 1.25rem;
}

.page-about .about-hero .display-title {
  max-width: 16ch;
  margin-bottom: 1.5rem;
}

.page-about .about-hero .lead {
  max-width: 38rem;
}

.page-about .about-hero__meta {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.page-about .about-hero__trust {
  font-size: 0.875rem;
  color: var(--about-text-secondary);
}

/* 起源区 */
.page-about .about-origin {
  position: relative;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.page-about .about-origin__content .lead {
  margin-bottom: 1.25rem;
}

.page-about .about-origin__content p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--about-text-secondary);
  margin-bottom: 1rem;
  max-width: 38rem;
}

.page-about .about-origin__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .about-origin__stat {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--divider);
  border-radius: var(--radius-card);
  padding: 1rem 1.25rem;
  min-width: 120px;
}

.page-about .about-origin__stat-num {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--about-accent-gold);
  line-height: 1.2;
}

.page-about .about-origin__stat-label {
  font-size: 0.8125rem;
  color: var(--about-text-secondary);
  margin-top: 0.375rem;
}

.page-about .about-origin__figure {
  margin: 0;
  border-radius: var(--radius-panel);
  overflow: hidden;
  border: 1px solid var(--divider);
  position: relative;
  background: var(--about-deep);
}

.page-about .about-origin__figure::after {
  content: "";
  position: absolute;
  inset: auto 1rem 1rem auto;
  width: 64px;
  height: 64px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.25), transparent 70%);
  pointer-events: none;
}

.page-about .about-origin__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  display: block;
}

.page-about .about-origin__figure figcaption {
  padding: 0.875rem 1.25rem;
  font-size: 0.8125rem;
  color: var(--about-text-secondary);
  border-top: 1px solid var(--divider);
  background: rgba(20, 26, 51, 0.6);
}

/* 里程碑 */
.page-about .about-milestones {
  position: relative;
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background:
    radial-gradient(600px 300px at 50% 0%, rgba(245, 197, 66, 0.08), transparent 60%),
    radial-gradient(500px 400px at 90% 100%, rgba(0, 229, 255, 0.07), transparent 60%);
  pointer-events: none;
}

.page-about .about-milestones__header {
  position: relative;
  max-width: 40rem;
  margin-bottom: 3rem;
}

.page-about .about-milestones__header p {
  color: var(--about-text-secondary);
  line-height: 1.75;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 2rem;
  max-width: 52rem;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.875rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--divider);
  border-radius: var(--radius-panel);
  padding: 1.5rem;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.page-about .about-timeline__item:hover {
  border-color: rgba(245, 197, 66, 0.4);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3), 0 0 20px rgba(245, 197, 66, 0.06);
  transform: translateY(-2px);
}

.page-about .about-timeline__year {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 200;
  line-height: 1;
  color: var(--about-accent-gold);
  letter-spacing: -0.02em;
  position: relative;
}

.page-about .about-timeline__marker {
  position: absolute;
  left: 1.25rem;
  top: 2.75rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--about-accent-cyan);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.6);
}

.page-about .about-timeline__card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--about-text);
  margin: 0 0 0.5rem;
}

.page-about .about-timeline__card p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--about-text-secondary);
  margin: 0;
}

.page-about .about-milestones__footnote {
  margin-top: 2.5rem;
  padding: 1.25rem 1.5rem;
  background: rgba(245, 197, 66, 0.06);
  border: 1px solid rgba(245, 197, 66, 0.2);
  border-radius: var(--radius-card);
  max-width: 52rem;
}

.page-about .about-milestones__footnote p {
  font-size: 0.9375rem;
  color: var(--about-text);
  margin: 0;
  line-height: 1.7;
}

/* 技术保障 */
.page-about .about-tech {
  background: linear-gradient(160deg, rgba(10, 14, 39, 0.9), rgba(5, 8, 20, 0.95));
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
}

.page-about .about-tech__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.page-about .about-tech__content .lead {
  margin-bottom: 1.5rem;
}

.page-about .about-tech__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.25rem;
}

.page-about .about-tech__list li {
  display: grid;
  gap: 0.25rem;
  padding-left: 1rem;
  border-left: 2px solid var(--about-accent-cyan);
  background: rgba(0, 229, 255, 0.02);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 0.625rem 1rem;
}

.page-about .about-tech__list strong {
  font-size: 1rem;
  font-weight: 700;
  color: var(--about-text);
}

.page-about .about-tech__list span {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--about-text-secondary);
}

.page-about .about-tech__figure {
  margin: 0;
  border-radius: var(--radius-panel);
  overflow: hidden;
  border: 1px solid var(--divider);
  background: var(--about-deep);
}

.page-about .about-tech__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.page-about .about-tech__figure figcaption {
  padding: 0.875rem 1.25rem;
  font-size: 0.8125rem;
  color: var(--about-text-secondary);
  border-top: 1px solid var(--divider);
}

.page-about .about-tech__metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 2.5rem;
}

.page-about .about-tech__metric {
  text-align: center;
  padding: 1.5rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--divider);
  border-radius: var(--radius-card);
  transition: border-color var(--transition), background var(--transition);
}

.page-about .about-tech__metric:hover {
  border-color: rgba(0, 229, 255, 0.35);
  background: rgba(0, 229, 255, 0.04);
}

.page-about .about-tech__metric-num {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--about-accent-cyan);
  line-height: 1.2;
}

.page-about .about-tech__metric-label {
  font-size: 0.8125rem;
  color: var(--about-text-secondary);
}

/* 团队文化 */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-panel);
  overflow: hidden;
  border: 1px solid var(--divider);
  background: var(--about-deep);
}

.page-about .about-team__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.page-about .about-team__figure figcaption {
  padding: 0.875rem 1.25rem;
  font-size: 0.8125rem;
  color: var(--about-text-secondary);
  border-top: 1px solid var(--divider);
  background: rgba(245, 197, 66, 0.05);
}

.page-about .about-team__content .lead {
  margin-bottom: 1rem;
}

.page-about .about-team__content p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--about-text-secondary);
  margin-bottom: 1rem;
  max-width: 38rem;
}

.page-about .about-team__values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.875rem;
  margin-top: 1.75rem;
}

.page-about .about-team__value {
  display: grid;
  gap: 0.25rem;
  background: rgba(245, 197, 66, 0.06);
  border: 1px solid rgba(245, 197, 66, 0.2);
  border-radius: var(--radius-card);
  padding: 1rem 0.875rem;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--about-text);
}

.page-about .about-team__value-num {
  font-size: 0.75rem;
  color: var(--about-accent-gold);
  font-weight: 700;
}

/* 结尾区域 */
.page-about .about-outro {
  padding: 3.5rem 0 5rem;
}

.page-about .about-outro__panel {
  background: linear-gradient(135deg, rgba(245, 197, 66, 0.12), rgba(0, 229, 255, 0.08));
  border: 1px solid rgba(245, 197, 66, 0.25);
  border-radius: var(--radius-xl);
  padding: 2.5rem 1.75rem;
  text-align: center;
}

.page-about .about-outro__panel .eyebrow {
  justify-content: center;
}

.page-about .about-outro__panel h2 {
  margin-bottom: 0.75rem;
}

.page-about .about-outro__panel p {
  color: var(--about-text-secondary);
  line-height: 1.7;
  max-width: 36rem;
  margin: 0 auto 1.75rem;
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.875rem;
}

/* 动画 */
@keyframes about-pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 8px var(--success);
  }
  50% {
    opacity: 0.6;
    box-shadow: 0 0 2px var(--success);
  }
}

/* 滚动显现 */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* 桌面端适配 */
@media (min-width: 768px) {
  .page-about .section {
    padding: 5.5rem 0;
  }

  .page-about .section--tight {
    padding: 4rem 0;
  }

  .page-about .about-hero {
    padding: 7rem 0 5.5rem;
  }

  .page-about .about-hero .display-title {
    font-size: clamp(3rem, 7vw, 5.25rem);
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 3rem;
  }

  .page-about .about-timeline {
    gap: 0;
    margin-left: 1.5rem;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 7rem 1fr;
    padding: 0;
    background: transparent;
    border: none;
    gap: 1.25rem;
  }

  .page-about .about-timeline__item:hover {
    border-color: transparent;
    box-shadow: none;
    transform: none;
  }

  .page-about .about-timeline__item::before {
    content: "";
    position: absolute;
    left: 3.5rem;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, rgba(245, 197, 66, 0.4), rgba(0, 229, 255, 0.2));
  }

  .page-about .about-timeline__item:last-child::before {
    bottom: auto;
    height: 3.75rem;
  }

  .page-about .about-timeline__year {
    font-size: 4.25rem;
    text-align: right;
    padding-right: 1.75rem;
    position: relative;
    z-index: 1;
    min-width: 7rem;
  }

  .page-about .about-timeline__marker {
    left: calc(7rem - 4px);
    top: 1.25rem;
    z-index: 2;
  }

  .page-about .about-timeline__card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--divider);
    border-radius: var(--radius-panel);
    padding: 1.5rem 1.75rem;
    margin-left: 1.75rem;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  }

  .page-about .about-timeline__card:hover {
    border-color: rgba(0, 229, 255, 0.35);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25), 0 0 16px rgba(0, 229, 255, 0.05);
    transform: translateX(4px);
  }

  .page-about .about-tech__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 3rem;
  }

  .page-about .about-tech__metrics {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 3rem;
  }

  .page-about .about-team__figure {
    order: 1;
  }

  .page-about .about-team__content {
    order: 2;
  }

  .page-about .about-outro__panel {
    padding: 3.5rem 3rem;
  }
}

@media (min-width: 1024px) {
  .page-about .container {
    padding-right: 2rem;
    padding-left: 2rem;
  }

  .page-about .about-milestones__header {
    margin-bottom: 3.5rem;
  }

  .page-about .about-timeline {
    max-width: 60rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .tag--status::before {
    animation: none;
  }

  .page-about .about-timeline__card:hover {
    transform: none;
  }

  .page-about .btn:hover {
    transform: none;
  }
}

.page-about {
  --radius-card: var(--radius-md);
  --radius-panel: var(--about-radius-panel);
}