.page-about {
  position: relative;
}

.page-about__intro {
  position: relative;
  padding: clamp(1.75rem, 4vw, 3.5rem) 0 var(--ly-space-3);
  overflow: hidden;
}

.page-about__intro::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 85% 15%, rgba(0, 229, 255, 0.14), transparent 60%),
    radial-gradient(ellipse at 15% 85%, rgba(255, 122, 0, 0.06), transparent 50%);
}

.page-about__intro .ly-container {
  position: relative;
  z-index: 1;
}

.page-about .ly-breadcrumb {
  margin-bottom: var(--ly-space-2);
}

.page-about__intro-grid {
  display: grid;
  gap: var(--ly-space-2);
}

.page-about__masthead {
  max-width: 720px;
}

.page-about__masthead-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ly-muted);
  margin-bottom: 1rem;
}

.page-about__masthead-meta .ly-version {
  color: var(--ly-green);
  border: 1px solid rgba(0, 255, 136, 0.35);
  background: rgba(0, 255, 136, 0.06);
  border-radius: 2px 10px 2px 10px;
  padding: 0.15rem 0.5rem;
  letter-spacing: 0.08em;
}

.page-about__masthead h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(3rem, 9vw, 6.25rem);
  font-weight: 200;
  line-height: 0.95;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--ly-text);
}

.page-about__subline {
  color: var(--ly-blue);
  font-size: clamp(1.05rem, 2.4vw, 1.5rem);
  font-weight: 300;
  margin: 0 0 var(--ly-space-2);
  letter-spacing: 0.02em;
}

.page-about__lead {
  color: var(--ly-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin: 0 0 var(--ly-space-2);
}

.page-about__quick-points {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about__quick-points span {
  background: var(--ly-panel);
  border: 1px solid var(--ly-line);
  color: var(--ly-text);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  padding: 0.4rem 0.75rem;
  border-radius: 2px 12px 2px 12px;
}

.page-about__intro-figure {
  margin: 0;
  position: relative;
}

.page-about__intro-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--ly-radius);
  border: 1px solid var(--ly-line);
  object-fit: cover;
}

.page-about__intro-figure figcaption {
  margin-top: 0.75rem;
  color: var(--ly-muted);
  font-size: 0.8rem;
  text-align: right;
  letter-spacing: 0.02em;
}

.page-about__chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ly-space-2);
  align-items: start;
}

.page-about__chapter-num {
  font-size: clamp(4rem, 12vw, 10rem);
  line-height: 1;
  margin-top: 0.25rem;
}

.page-about__chapter .ly-chapter-title {
  display: inline-block;
  position: relative;
  margin: 0 0 var(--ly-space-1);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.page-about__chapter .ly-chapter-title::after {
  content: "";
  display: block;
  width: 3rem;
  height: 3px;
  background: var(--ly-grad-cg);
  margin-top: 0.5rem;
}

.page-about__section-lead {
  color: var(--ly-muted);
  max-width: 640px;
  font-size: 1.05rem;
  line-height: 1.8;
  margin: 0 0 var(--ly-space-2);
}

.page-about__story-outline {
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  font-weight: 300;
  line-height: 1.5;
  color: var(--ly-text);
  max-width: 760px;
  margin: 0 0 var(--ly-space-2);
}

.page-about__story-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ly-space-2);
}

.page-about__story-copy p {
  color: var(--ly-muted);
  line-height: 1.8;
  margin: 0 0 1rem;
}

.page-about__story-points {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--ly-panel);
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius);
  overflow: hidden;
}

.page-about__story-points li {
  padding: var(--ly-space-1);
  border-bottom: 1px solid var(--ly-line);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-about__story-points li:last-child {
  border-bottom: 0;
}

.page-about__story-points span {
  color: var(--ly-green);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

.page-about__story-points p {
  color: var(--ly-muted);
  margin: 0;
  font-size: 0.95rem;
}

.page-about__timeline {
  list-style: none;
  margin: var(--ly-space-2) 0;
  padding: 0;
  position: relative;
}

.page-about__timeline-item {
  position: relative;
  padding: 0 0 var(--ly-space-2) 2.5rem;
}

.page-about__timeline-item::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 1.25rem;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, rgba(0, 229, 255, 0.6), transparent);
}

.page-about__timeline-item:last-child::before {
  display: none;
}

.page-about__timeline-node {
  position: absolute;
  left: 0;
  top: 0.25rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--ly-blue);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.15), 0 0 18px rgba(0, 229, 255, 0.45);
  transition: box-shadow 0.25s ease;
}

.page-about__timeline-item:hover .page-about__timeline-node,
.page-about__timeline-item:focus-within .page-about__timeline-node {
  box-shadow: 0 0 0 6px rgba(0, 229, 255, 0.22), 0 0 28px rgba(0, 229, 255, 0.7);
}

.page-about__timeline-version {
  display: inline-block;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ly-green);
  background: rgba(0, 255, 136, 0.07);
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: 2px 10px 2px 10px;
  padding: 0.2rem 0.55rem;
  margin-bottom: 0.5rem;
}

.page-about__timeline-content h3 {
  margin: 0 0 0.4rem;
  color: var(--ly-text);
  font-weight: 500;
  font-size: 1.1rem;
}

.page-about__timeline-content p {
  color: var(--ly-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  margin: 0;
}

.page-about__milestone-figure {
  margin: var(--ly-space-2) 0 0;
}

.page-about__milestone-figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--ly-radius);
  border: 1px solid var(--ly-line);
}

.page-about__milestone-figure figcaption {
  margin-top: 0.75rem;
  color: var(--ly-muted);
  font-size: 0.8rem;
  text-align: left;
}

.page-about__data {
  position: relative;
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.05) 25%, transparent 25%) 0 0 / 36px 36px,
    linear-gradient(315deg, rgba(255, 255, 255, 0.02) 25%, transparent 25%) 0 0 / 36px 36px;
}

.page-about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: var(--ly-space-2) 0;
}

.page-about__stat {
  background: linear-gradient(145deg, var(--ly-panel), var(--ly-bg));
  border: 1px solid var(--ly-line);
  border-top: 2px solid var(--ly-blue);
  border-radius: var(--ly-radius);
  padding: var(--ly-space-1);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: border-color 0.25s ease;
}

.page-about__stat:hover {
  border-color: var(--ly-line-acc);
}

.page-about__stat:nth-child(2) .page-about__stat-num {
  color: var(--ly-green);
  text-shadow: 0 0 28px rgba(0, 255, 136, 0.35);
}

.page-about__stat:nth-child(3) .page-about__stat-num {
  color: var(--ly-blue);
  text-shadow: 0 0 28px rgba(0, 229, 255, 0.35);
}

.page-about__stat:nth-child(4) .page-about__stat-num {
  color: var(--ly-orange);
  text-shadow: 0 0 28px rgba(255, 122, 0, 0.35);
}

.page-about__stat-num {
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  font-weight: 100;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--ly-blue);
  text-shadow: 0 0 28px rgba(0, 229, 255, 0.35);
  opacity: 0;
  animation: leyu-about-num-in 0.7s ease forwards;
}

.page-about__stat:nth-child(1) .page-about__stat-num {
  animation-delay: 0.1s;
}

.page-about__stat:nth-child(2) .page-about__stat-num {
  animation-delay: 0.2s;
}

.page-about__stat:nth-child(3) .page-about__stat-num {
  animation-delay: 0.3s;
}

.page-about__stat:nth-child(4) .page-about__stat-num {
  animation-delay: 0.4s;
}

@keyframes leyu-about-num-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-about__stat-label {
  color: var(--ly-text);
  font-weight: 500;
  font-size: 0.9rem;
}

.page-about__stat-note {
  color: var(--ly-muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.page-about__data-figure {
  margin: var(--ly-space-2) 0 0;
}

.page-about__data-figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--ly-radius);
  border: 1px solid var(--ly-line);
  object-fit: cover;
}

.page-about__data-figure figcaption {
  margin-top: 0.75rem;
  color: var(--ly-muted);
  font-size: 0.8rem;
  text-align: left;
}

.page-about__team-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: var(--ly-space-2);
}

.page-about__team-card {
  background: var(--ly-panel);
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius);
  padding: var(--ly-space-1);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about__team-card:hover,
.page-about__team-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--ly-line-acc);
  box-shadow: 0 8px 30px rgba(0, 229, 255, 0.08);
}

.page-about__team-card svg {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--ly-blue);
}

.page-about__team-card h3 {
  color: var(--ly-text);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
}

.page-about__team-card p {
  color: var(--ly-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

.page-about__cert-list {
  list-style: none;
  margin: var(--ly-space-2) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about__cert-item {
  background: linear-gradient(135deg, rgba(255, 122, 0, 0.08), rgba(255, 45, 120, 0.04));
  border: 1px solid rgba(255, 122, 0, 0.22);
  border-left: 4px solid var(--ly-orange);
  border-radius: 2px 16px 2px 16px;
  padding: var(--ly-space-1);
}

.page-about__cert-tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ly-orange);
  border: 1px solid rgba(255, 122, 0, 0.35);
  background: rgba(255, 122, 0, 0.08);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  margin-bottom: 0.75rem;
}

.page-about__cert-item h3 {
  color: var(--ly-text);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
}

.page-about__cert-item p {
  color: var(--ly-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  margin: 0;
}

.page-about__closing {
  padding-top: 0;
}

.page-about__closing-card {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(0, 255, 136, 0.05)), var(--ly-panel);
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius);
  padding: clamp(1.75rem, 5vw, 4rem);
  text-align: center;
}

.page-about__closing-card h2 {
  margin: 0 0 var(--ly-space-1);
  font-weight: 300;
  font-size: clamp(1.75rem, 4.5vw, 3rem);
  letter-spacing: -0.02em;
  color: var(--ly-text);
  text-transform: uppercase;
}

.page-about__closing-card p {
  color: var(--ly-muted);
  max-width: 580px;
  margin: 0 auto var(--ly-space-2);
  line-height: 1.8;
}

.page-about__closing-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

@media (prefers-reduced-motion: reduce) {
  .page-about__stat-num {
    opacity: 1;
    animation: none;
  }
}

@media (min-width: 768px) {
  .page-about__chapter {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .page-about__intro-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }

  .page-about__story-grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    align-items: start;
  }

  .page-about__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about__team-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

@media (min-width: 1024px) {
  .page-about__timeline {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--ly-space-2);
    margin-top: var(--ly-space-2);
    padding-top: 2rem;
    position: relative;
  }

  .page-about__timeline-item {
    padding: 0;
  }

  .page-about__timeline-item::before {
    content: none;
  }

  .page-about__timeline-item::after {
    content: "";
    position: absolute;
    top: 0.86rem;
    left: 1.375rem;
    width: calc(100% + var(--ly-space-2));
    height: 2px;
    background: linear-gradient(to right, rgba(0, 229, 255, 0.7), rgba(0, 229, 255, 0.15));
  }

  .page-about__timeline-item:last-child::after {
    display: none;
  }

  .page-about__timeline-node {
    top: 0.86rem;
    left: 0.75rem;
    transform: translateY(-50%);
  }

  .page-about__timeline-version {
    margin-bottom: 0.75rem;
  }

  .page-about__timeline-content {
    padding-top: 1.25rem;
  }
}