.page-about {
  --about-gap: 24px;
  --about-radius: 14px;
  --about-accent: #00E5FF;
  --about-pink: #FF3E8E;
  --about-grad-blue: linear-gradient(135deg, rgba(30, 58, 138, 0.8), rgba(109, 40, 217, 0.5));
  --about-panel: rgba(17, 24, 39, 0.72);
  --about-line: rgba(233, 239, 249, 0.14);
  --about-line-strong: rgba(0, 229, 255, 0.5);
}

.page-about .breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  padding: 12px 20px;
}

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

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

.page-about .breadcrumb__sep {
  margin: 0 8px;
  opacity: 0.6;
}

.page-about .breadcrumb span[aria-current='page'] {
  color: var(--text);
}

.page-about .about-hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  background: var(--bg-deep);
  margin: 0 0 calc(var(--about-gap) * 2);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  z-index: 0;
  opacity: 0.65;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: 64px 20px 44px;
  background: linear-gradient(to top, rgba(11, 12, 16, 0.96) 0%, rgba(11, 12, 16, 0.72) 50%, transparent 100%);
}

.page-about .about-hero__tags {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.page-about .about-hero__title {
  font-size: clamp(2.2rem, 7vw, 4.2rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  color: var(--text);
}

.page-about .about-hero__kicker {
  display: block;
  font-size: 0.38em;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--about-accent);
  margin-bottom: 8px;
}

.page-about .about-hero__lead {
  font-size: clamp(1.1rem, 2.6vw, 1.6rem);
  font-weight: 500;
  color: var(--about-accent);
  margin: 0 0 14px;
  line-height: 1.4;
}

.page-about .about-hero__desc {
  max-width: 56ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-dim);
  margin: 0 0 20px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--about-line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
}

.page-about .about-hero__stat strong {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
}

.page-about .about-hero__stat span {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.page-about .about-hero__scan {
  position: absolute;
  top: 12px;
  left: 16px;
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.12em;
  z-index: 3;
}

.page-about .section {
  padding: 40px 20px;
}

.page-about .section-head {
  margin-bottom: 28px;
}

.page-about .section-head .mono-label {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--about-accent);
}

.page-about .section-title {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 800;
  margin: 0 0 8px;
}

.page-about .section-note {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin: 0;
}

.page-about .about-intro {
  padding-top: 20px;
}

.page-about .about-intro__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-intro__statement p {
  line-height: 1.8;
  color: var(--text-dim);
  margin: 0 0 14px;
}

.page-about .about-intro__statement p:first-of-type {
  color: var(--text);
  font-size: 1.05rem;
}

.page-about .about-intro__statement a {
  color: var(--about-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
  transition: border-color 0.3s ease;
}

.page-about .about-intro__statement a:hover {
  border-color: var(--about-accent);
}

.page-about .about-intro__principles {
  display: grid;
  gap: 14px;
}

.page-about .about-intro__principle {
  padding: 18px;
  border-radius: 12px;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.page-about .about-intro__principle.is-highlight {
  border-color: var(--about-line-strong);
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.35), rgba(109, 40, 217, 0.22));
}

.page-about .about-intro__principle .mono-label {
  font-size: 0.72rem;
  color: var(--about-accent);
}

.page-about .about-intro__principle h3 {
  font-size: 1.1rem;
  margin: 6px 0 6px;
}

.page-about .about-intro__principle p {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.65;
  margin: 0;
}

.page-about .about-timeline {
  position: relative;
  padding: calc(var(--about-gap) * 2) 20px;
  margin-top: 20px;
  background: linear-gradient(to bottom, transparent, rgba(30, 58, 138, 0.14) 12%, rgba(109, 40, 217, 0.1) 50%, rgba(30, 58, 138, 0.12) 88%, transparent);
}

.page-about .about-timeline__viewport {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 12px 4px 28px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-color: rgba(0, 229, 255, 0.7) rgba(255, 255, 255, 0.08);
  scrollbar-width: thin;
}

.page-about .about-timeline__track {
  display: flex;
  gap: 16px;
  width: max-content;
  padding: 58px 0 0;
  position: relative;
}

.page-about .about-timeline__rail {
  position: absolute;
  top: 52px;
  left: 20px;
  right: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--about-accent) 0%, rgba(109, 40, 217, 0.9) 40%, rgba(0, 229, 255, 0.4) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  flex: 0 0 82vw;
  max-width: 320px;
  scroll-snap-align: start;
  padding: 24px 20px;
  border-radius: 14px;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.page-about .about-timeline__item:hover {
  box-shadow: var(--shadow);
  border-color: var(--about-line-strong);
  transform: translateY(-2px);
}

.page-about .about-timeline__item.is-current {
  border-color: rgba(255, 62, 142, 0.5);
  background: linear-gradient(160deg, rgba(30, 58, 138, 0.3), rgba(109, 40, 217, 0.2));
}

.page-about .about-timeline__marker {
  position: absolute;
  top: -52px;
  left: 20px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--about-accent);
  background: linear-gradient(135deg, #6B7280, #E5E7EB);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.18), 0 0 20px rgba(0, 229, 255, 0.4);
}

.page-about .about-timeline__year {
  font-size: 0.75rem;
  font-weight: 700;
  color: #0B0C10;
}

.page-about .about-timeline__item h3 {
  font-size: 1.15rem;
  margin: 0 0 8px;
}

.page-about .about-timeline__item p {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-dim);
  margin: 0 0 12px;
}

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

.page-about .about-versions__layout {
  display: grid;
  gap: 28px;
}

.page-about .media-frame {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--about-panel);
  margin: 0;
}

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

.page-about .media-frame figcaption {
  padding: 8px 12px;
  font-size: 0.72rem;
  color: var(--text-dim);
  border-top: 1px solid var(--about-line);
}

.page-about .about-versions__note {
  margin-top: 16px;
  padding: 16px;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-dim);
  border-radius: 12px;
  border: 1px solid var(--about-line);
}

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

.page-about .about-versions__row {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 8px 16px;
  padding: 16px;
  border-radius: 12px;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  align-items: start;
}

.page-about .about-versions__row .tag {
  grid-column: 1 / -1;
  justify-self: start;
}

.page-about .about-versions__row.is-current {
  border-color: rgba(0, 229, 255, 0.55);
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.3), rgba(109, 40, 217, 0.16));
}

.page-about .about-versions__ver {
  font-size: 0.72rem;
  color: var(--about-accent);
  white-space: nowrap;
  padding-top: 2px;
}

.page-about .about-versions__body h3 {
  font-size: 1.05rem;
  margin: 0 0 6px;
}

.page-about .about-versions__body p {
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--text-dim);
  margin: 0 0 6px;
}

.page-about .about-versions__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-team {
  padding-bottom: 60px;
}

.page-about .about-team__layout {
  display: grid;
  gap: 28px;
}

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

.page-about .about-team__visual .media-frame {
  border-color: rgba(233, 239, 249, 0.2);
}

.page-about .about-team__visual .media-frame::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 14px;
  border: 1px solid rgba(0, 229, 255, 0.25);
  pointer-events: none;
  animation: page-about-team-pulse 4s ease-in-out infinite;
}

.page-about .about-team__content > p {
  line-height: 1.8;
  color: var(--text-dim);
  margin: 0 0 16px;
}

.page-about .about-team__roles {
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
}

.page-about .about-team__role {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--about-line);
}

.page-about .about-team__role-index {
  color: var(--about-pink);
  font-size: 0.72rem;
  margin-top: 4px;
}

.page-about .about-team__role h3 {
  font-size: 1rem;
  margin: 0 0 4px;
}

.page-about .about-team__role p {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin: 0;
}

.page-about .btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  text-decoration: none;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .btn--ghost {
  border: 1px solid var(--about-line);
  color: var(--text);
}

.page-about .btn--ghost:hover {
  border-color: var(--about-accent);
  color: var(--about-accent);
}

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

.page-about .btn--accent:hover {
  border-color: var(--about-accent);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
}

@keyframes page-about-team-pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__visual .media-frame::after,
  .page-about .about-timeline__item,
  .page-about .about-versions__row,
  .page-about .about-intro__principle,
  .page-about .btn {
    transition: none;
    animation: none;
  }
}

@media (min-width: 640px) {
  .page-about .section {
    padding: 48px 24px;
  }
  .page-about .about-hero__inner {
    padding-left: 32px;
    padding-right: 32px;
  }
  .page-about .about-hero__stats {
    grid-template-columns: repeat(5, 1fr);
  }
  .page-about .about-timeline__item {
    flex-basis: 320px;
    max-width: 320px;
  }
  .page-about .about-team__roles {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  .page-about .about-versions__row {
    grid-template-columns: max-content 1fr max-content;
    align-items: center;
  }
  .page-about .about-versions__row .tag {
    grid-column: auto;
    justify-self: auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-intro__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: start;
  }
  .page-about .about-versions__layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 40px;
    align-items: start;
  }
  .page-about .about-team__layout {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 48px;
    align-items: center;
  }
  .page-about .about-timeline__viewport {
    padding-bottom: 24px;
  }
  .page-about .section {
    padding: 60px 32px;
  }
}