.page-about {
  --about-ink: #0B0B0F;
  --about-card: #16161A;
  --about-line: #2E2E34;
  --about-text: #F5F5F5;
  --about-dim: #A0A0A8;
  --about-primary: #FF4500;
  --about-accent: #00E5FF;
  --about-purple: #7A5AF8;
  --about-light: #E9E9ED;
  --about-display: "Impact", "Haettenschweiler", "Arial Narrow", "Noto Serif SC", "Songti SC", STSong, "SimSun", serif;
  --about-body: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--about-ink);
  color: var(--about-text);
  font-family: var(--about-body);
  line-height: 1.7;
  overflow-x: clip;
}

.page-about__intro {
  position: relative;
  padding: 3rem 0 4rem;
  background:
    radial-gradient(ellipse 80% 60% at 85% 10%, rgba(255, 69, 0, .18), transparent 60%),
    linear-gradient(145deg, var(--about-ink) 0%, #0E0E14 70%, #13131A 100%);
  border-bottom: 1px solid rgba(255, 69, 0, .35);
}

.page-about__intro::after {
  content: "";
  position: absolute;
  right: -4rem;
  top: 20%;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 255, .08), transparent 65%);
  pointer-events: none;
}

.page-about__intro-inner {
  position: relative;
}

.page-about__intro .breadcrumb {
  margin-bottom: 3rem;
}

.page-about__intro-grid {
  display: grid;
  gap: 2.5rem;
}

.page-about__kicker {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.page-about__kicker-text {
  font-size: .8rem;
  letter-spacing: .16em;
  color: var(--about-dim);
  text-transform: uppercase;
}

.page-about__intro-main h1 {
  font-family: var(--about-display);
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  line-height: 1.16;
  letter-spacing: .01em;
  margin: 0 0 1.4rem;
  max-width: 17em;
}

.page-about__intro-main .lede {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--about-dim);
  max-width: 36em;
  margin: 0;
}

.page-about__stat-board {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.page-about__stat-cell {
  background: var(--about-card);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.1rem;
  text-align: center;
  transition: border-color .3s ease, background .3s ease;
}

.page-about__stat-cell:hover {
  border-color: rgba(0, 229, 255, .4);
}

.page-about__stat-cell .stat__value {
  display: block;
  font-family: var(--about-display);
  font-size: 1.9rem;
  line-height: 1.1;
  color: var(--about-primary);
  margin-bottom: .3rem;
}

.page-about__stat-cell .stat__label {
  display: block;
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--about-dim);
}

.page-about__section {
  position: relative;
  padding: clamp(3rem, 7vw, 7rem) 0;
}

.page-about__section-head {
  margin-bottom: 2.5rem;
}

.page-about__num {
  font-family: var(--about-display);
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 1;
  color: rgba(255, 69, 0, .5);
  display: block;
  margin-bottom: .75rem;
  letter-spacing: .04em;
}

.page-about__copy h2,
.page-about__section-head h2 {
  font-family: var(--about-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.22;
  margin: .5rem 0 1.2rem;
}

.page-about__copy p {
  color: var(--about-dim);
  margin: 0 0 1.2rem;
  max-width: 38em;
}

.page-about__copy .btn {
  margin-top: .4rem;
}

.page-about__split {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.page-about__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  background: var(--about-card);
  border: 1px solid var(--about-line);
}

.page-about__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
}

.page-about__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, .12);
  pointer-events: none;
}

.page-about__milestones {
  background:
    radial-gradient(ellipse 70% 50% at 12% 0%, rgba(122, 90, 248, .12), transparent 55%),
    linear-gradient(180deg, var(--about-ink) 0%, #101018 100%);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  overflow: hidden;
}

.page-about__milestones .page-about__section-head {
  max-width: 620px;
}

.page-about__milestones-hero {
  margin: 2rem 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-height: 300px;
  transform: rotate(-1.2deg) scale(1.03);
  border: 1px solid rgba(255, 69, 0, .18);
}

.page-about__milestones-hero img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about__timeline-container {
  padding-top: 1rem;
}

.page-about__timeline {
  position: relative;
  max-width: 780px;
  margin-inline: auto;
  padding-top: 2rem;
}

.page-about__timeline-rail {
  position: absolute;
  left: 6rem;
  top: 0;
  bottom: 0;
  width: 3rem;
  z-index: 0;
  pointer-events: none;
}

.page-about__timeline-rail svg {
  width: 100%;
  height: 100%;
  display: block;
}

.page-about__timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  z-index: 1;
}

.page-about__timeline-item {
  display: grid;
  grid-template-columns: 5.5rem 3rem 1fr;
  gap: .5rem;
  align-items: start;
  padding: 1.75rem 0;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, .05);
}

.page-about__timeline-item:last-child {
  border-bottom: 0;
}

.page-about__timeline-version {
  font-family: var(--about-display);
  font-size: 1.15rem;
  letter-spacing: .05em;
  color: var(--about-accent);
  display: block;
  text-align: right;
  padding-right: .5rem;
  padding-top: .4rem;
  white-space: nowrap;
}

.page-about__timeline-dot {
  position: absolute;
  left: calc(6rem + 1.5rem - 7px);
  top: 2.4rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--about-primary);
  border: 3px solid var(--about-ink);
  box-shadow: 0 0 0 3px rgba(255, 69, 0, .25);
  transition: transform .25s ease, box-shadow .25s ease;
}

.page-about__timeline-item:hover .page-about__timeline-dot {
  transform: scale(1.35);
  box-shadow: 0 0 0 6px rgba(255, 69, 0, .2);
}

.page-about__timeline-card {
  background: var(--about-card);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.5rem;
  transition: border-color .3s ease, box-shadow .3s ease, transform .3s ease;
}

.page-about__timeline-card:hover {
  border-color: rgba(0, 229, 255, .45);
  box-shadow: var(--shadow-accent);
}

.page-about__timeline-card--current {
  border-left: 4px solid var(--about-purple);
  background: linear-gradient(135deg, var(--about-card), #1B1B22);
}

.page-about__timeline-card h3 {
  font-family: var(--about-display);
  font-size: 1.15rem;
  margin: .4rem 0 .55rem;
  color: var(--about-text);
}

.page-about__timeline-card p {
  color: var(--about-dim);
  font-size: .92rem;
  margin: 0;
}

.page-about__timeline-tag {
  display: inline-block;
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--about-primary);
  border: 1px solid rgba(255, 69, 0, .35);
  padding: .18rem .7rem;
  border-radius: var(--radius-pill);
}

.page-about__altitude {
  background:
    linear-gradient(120deg, rgba(255, 69, 0, .04), transparent 45%),
    var(--about-light);
  color: var(--about-ink);
}

.page-about__altitude .page-about__num {
  color: rgba(255, 69, 0, .45);
}

.page-about__altitude .eyebrow {
  color: var(--about-primary);
}

.page-about__altitude .page-about__copy h2 {
  color: var(--about-ink);
}

.page-about__altitude .page-about__copy p {
  color: #333338;
}

.page-about__altitude-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .75rem;
  margin-top: 2rem;
}

.page-about__altitude-stats .stat {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 1.2rem .9rem;
  text-align: center;
  border: 1px solid rgba(0, 0, 0, .08);
}

.page-about__altitude-stats .stat__value {
  display: block;
  font-family: var(--about-display);
  font-size: 1.45rem;
  color: var(--about-primary);
  line-height: 1.2;
}

.page-about__altitude-stats .stat__label {
  display: block;
  font-size: .72rem;
  color: #55555C;
  letter-spacing: .05em;
  margin-top: .3rem;
}

.page-about__altitude-note {
  background: var(--about-ink);
  color: var(--about-text);
  border-radius: var(--radius-lg);
  padding: 2rem 2.1rem;
  position: relative;
  overflow: hidden;
}

.page-about__altitude-note::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: linear-gradient(180deg, var(--about-primary), var(--about-accent));
}

.page-about__note-kicker {
  font-family: var(--about-display);
  font-size: 1.2rem;
  color: var(--about-accent);
  margin: 0 0 1.3rem;
  letter-spacing: .02em;
}

.page-about__note-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .85rem;
}

.page-about__note-list li {
  position: relative;
  padding-left: 1.3rem;
  color: var(--about-dim);
  font-size: .95rem;
}

.page-about__note-list li::before {
  content: "◆";
  position: absolute;
  left: 0;
  color: var(--about-primary);
  font-size: .62rem;
  top: .4rem;
}

.page-about__philosophy {
  border-top: 1px solid var(--about-line);
}

.page-about__philosophy .page-about__copy h2 {
  max-width: 12em;
}

.page-about__cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 1.6rem;
}

@media (min-width: 768px) {
  .page-about__intro {
    padding: 4.5rem 0 5rem;
  }

  .page-about__intro-grid {
    grid-template-columns: 1.35fr 1fr;
    gap: 4rem;
    align-items: end;
  }

  .page-about__stat-board {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.1rem;
  }

  .page-about__split {
    grid-template-columns: 1fr 1fr;
    gap: clamp(2.5rem, 5vw, 5rem);
  }

  .page-about__origins .page-about__figure {
    order: 2;
  }

  .page-about__origins .page-about__copy {
    order: 1;
  }

  .page-about__philosophy .page-about__figure {
    order: 1;
  }

  .page-about__philosophy .page-about__copy {
    order: 2;
  }

  .page-about__milestones-hero {
    margin: 2.5rem auto 0;
    max-height: 460px;
    width: 100%;
    transform: rotate(-.8deg) scale(1.02);
  }

  .page-about__timeline {
    max-width: 940px;
    padding-top: 3rem;
  }

  .page-about__timeline-rail {
    left: 10.5rem;
    width: 4rem;
  }

  .page-about__timeline-item {
    grid-template-columns: 9rem 4rem 1fr;
    gap: 1.5rem;
    padding: 2.25rem 0;
  }

  .page-about__timeline-version {
    font-size: 1.5rem;
    padding-top: .8rem;
    color: var(--about-accent);
  }

  .page-about__timeline-dot {
    left: calc(10.5rem + 2rem - 7px);
    top: 2.45rem;
  }

  .page-about__timeline-card {
    padding: 1.7rem 2rem;
  }

  .page-about__altitude-note {
    padding: 2.4rem 2.6rem;
  }

  .page-about__altitude-stats {
    gap: 1rem;
  }
}

@media (min-width: 1024px) {
  .page-about__intro-grid {
    gap: 5rem;
  }

  .page-about__stat-board {
    gap: 1.25rem;
  }

  .page-about__stat-cell {
    padding: 1.6rem 1.3rem;
  }

  .page-about__stat-cell .stat__value {
    font-size: 2.2rem;
  }

  .page-about__split {
    gap: 4.5rem;
  }

  .page-about__milestones-hero {
    max-height: 520px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}