.page-about {
  --page-accent: #00E676;
  --page-accent-2: #FF6A00;
  --page-ink: #0F1B33;
  --page-card: #1B2A4A;
  --page-deep: #0A1128;
  --page-mist: #B0BEC5;
  --page-steel: #4FC3F7;
  --page-bolt: #9C27B0;
  --page-gold: #FFD600;
  --page-line: 2px;
  --page-shadow: 7px 7px 0 rgba(0, 0, 0, 0.35);
  background-color: var(--page-deep);
  color: #FFFFFF;
  overflow-x: hidden;
}

.page-about .container {
  max-width: var(--content-max, 1200px);
  margin: 0 auto;
  padding-left: var(--gutter, 16px);
  padding-right: var(--gutter, 16px);
}

.page-about .container--narrow {
  max-width: 860px;
}

.page-about .breadcrumb {
  max-width: var(--content-max, 1200px);
  margin: 0 auto;
  padding: 16px var(--gutter, 16px) 0;
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif);
  font-size: 0.875rem;
  color: var(--page-mist);
  display: flex;
  gap: 8px;
}

.page-about .breadcrumb__link {
  color: var(--page-steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .breadcrumb__link:hover {
  border-bottom-color: var(--page-steel);
  color: var(--page-accent);
}

/* hero */
.page-about .about-hero {
  padding: clamp(40px, 7vw, 80px) 0 40px;
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    linear-gradient(120deg, rgba(0, 230, 118, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 20%, rgba(79, 195, 247, 0.12) 0%, transparent 50%),
    linear-gradient(180deg, transparent 60%, rgba(10, 17, 40, 0.6) 100%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.page-about .about-hero__eyebrow {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--page-accent);
  border: 2px solid rgba(0, 230, 118, 0.5);
  padding: 6px 12px;
  display: inline-block;
}

.page-about .about-hero h1 {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: clamp(1.75rem, 4vw, 3.125rem);
  font-weight: 900;
  line-height: 1.15;
  margin: 0;
  max-width: 760px;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--page-mist);
  max-width: 640px;
  margin: 0;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 8px;
}

.page-about .about-hero__visual {
  border: var(--page-line) solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--page-shadow);
  position: relative;
}

.page-about .about-hero__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 16 / 9.5;
  max-width: 100%;
}

.page-about .about-hero__signal {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(10, 17, 40, 0.82);
  border-top: 2px solid rgba(0, 230, 118, 0.4);
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif);
  font-size: 0.8125rem;
  backdrop-filter: blur(4px);
}

.page-about .about-hero__signal-text {
  color: #FFFFFF;
  letter-spacing: 0.08em;
}

/* chapter nav */
.page-about .chapter-nav {
  position: relative;
  z-index: 2;
  margin-top: 24px;
  margin-bottom: 24px;
  border: 2px solid rgba(176, 190, 197, 0.25);
  background: rgba(27, 42, 74, 0.7);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.25);
  padding: 16px 20px;
}

.page-about .chapter-nav__label {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--page-accent);
  margin: 0 0 10px;
}

.page-about .chapter-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.page-about .chapter-nav__link {
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--page-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}

.page-about .chapter-nav__link:hover {
  color: var(--page-accent);
  border-bottom-color: var(--page-accent);
}

/* shared section rhythm */
.page-about .section {
  padding: clamp(48px, 8vw, 96px) 0;
  position: relative;
}

.page-about .section--card {
  background-color: rgba(27, 42, 74, 0.55);
  border-top: 2px solid rgba(255, 255, 255, 0.08);
  border-bottom: 2px solid rgba(255, 255, 255, 0.08);
}

.page-about .section--ink {
  background-color: var(--page-ink);
  border-top: 2px solid rgba(255, 255, 255, 0.08);
  border-bottom: 2px solid rgba(255, 255, 255, 0.08);
}

.page-about .section__eyebrow {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--page-accent-2);
  margin: 0 0 12px;
}

.page-about .section__head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 40px;
}

.page-about .section__title {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: clamp(1.625rem, 3.2vw, 2.5rem);
  font-weight: 900;
  line-height: 1.2;
  margin: 0;
  max-width: 700px;
}

.page-about .section__lede {
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--page-mist);
  margin: 0;
  max-width: 560px;
}

/* story start */
.page-about .story-start .rich-text p {
  margin: 0 0 1.2em;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.88);
}

.page-about .story-quote {
  margin: 32px 0 0;
  padding: 20px 24px;
  border-left: 4px solid var(--page-accent);
  background: rgba(0, 230, 118, 0.06);
}

.page-about .story-quote p {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  font-weight: 700;
  line-height: 1.5;
  margin: 0;
  color: #FFFFFF;
}

/* timeline */
.page-about .timeline {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-bottom: 48px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 10px;
  width: 3px;
  background: linear-gradient(180deg, var(--page-accent) 0%, var(--page-steel) 50%, var(--page-accent-2) 100%);
  opacity: 0.5;
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  position: relative;
  padding-left: 28px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 6px;
  width: 20px;
  height: 20px;
  background: var(--page-deep);
  border: 3px solid var(--page-accent);
  z-index: 1;
}

.page-about .timeline__marker {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--page-accent);
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.page-about .timeline__panel {
  border: 2px solid rgba(176, 190, 197, 0.3);
  background: rgba(15, 27, 51, 0.7);
  padding: 18px 20px;
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.3);
}

.page-about .timeline__title {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 1.0625rem;
  font-weight: 800;
  margin: 0 0 8px;
  color: #FFFFFF;
}

.page-about .timeline__panel p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--page-mist);
}

.page-about .timeline-photo {
  border: 2px solid rgba(255, 255, 255, 0.15);
  box-shadow: var(--page-shadow);
}

.page-about .media-frame {
  display: block;
  margin: 0;
}

.page-about .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-frame--169 .media-frame__img {
  aspect-ratio: 16 / 9;
}

.page-about .media-frame__caption {
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif);
  font-size: 0.8125rem;
  color: var(--page-mist);
  padding: 10px 12px;
  background: rgba(15, 27, 51, 0.8);
  border-top: 2px solid rgba(0, 230, 118, 0.25);
}

/* data */
.page-about .data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 40px;
}

.page-about .data-card {
  border: 2px solid rgba(255, 255, 255, 0.15);
  background: linear-gradient(145deg, rgba(27, 42, 74, 0.85) 0%, rgba(15, 27, 51, 0.9) 100%);
  padding: 24px 22px;
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}

.page-about .data-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--page-accent);
}

.page-about .data-card:nth-child(even)::after {
  background: var(--page-accent-2);
}

.page-about .data-card__value {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 900;
  line-height: 1.1;
  margin: 0 0 6px;
  color: #FFFFFF;
}

.page-about .data-card:nth-child(even) .data-card__value {
  color: var(--page-accent-2);
}

.page-about .data-card__label {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0 0 8px;
  color: var(--page-accent);
}

.page-about .data-card:nth-child(even) .data-card__label {
  color: var(--page-steel);
}

.page-about .data-card__desc {
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif);
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--page-mist);
  margin: 0;
}

.page-about .data-visual {
  border: 2px solid rgba(255, 255, 255, 0.15);
  box-shadow: var(--page-shadow);
}

/* ecosystem */
.page-about .ecosystem-grid {
  row-gap: 20px;
}

.page-about .panel--pad-lg {
  padding: 24px 22px;
  border: 2px solid rgba(176, 190, 197, 0.2);
  background: rgba(27, 42, 74, 0.7);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.3);
}

.page-about .panel__title {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 1.125rem;
  font-weight: 800;
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(0, 230, 118, 0.4);
  color: #FFFFFF;
}

.page-about .ecosystem-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .ecosystem-list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
}

.page-about .ecosystem-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  background: var(--page-accent-2);
}

.page-about .ecosystem-note {
  margin-top: 28px;
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--page-mist);
  padding: 14px 16px;
  border: 2px dashed rgba(176, 190, 197, 0.35);
  background: rgba(10, 17, 40, 0.5);
}

/* team */
.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.page-about .team-chart {
  border: 2px solid rgba(176, 190, 197, 0.25);
  background: rgba(15, 27, 51, 0.75);
  box-shadow: var(--page-shadow);
  padding: 24px 18px;
}

.page-about .team-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  border: 2px solid rgba(0, 230, 118, 0.5);
  padding: 16px 12px;
  background: rgba(27, 42, 74, 0.7);
}

.page-about .team-node--lead {
  border-color: var(--page-accent);
}

.page-about .team-node__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.page-about .team-node__icon svg {
  display: block;
}

.page-about .team-node__text {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 0.9375rem;
  font-weight: 800;
  color: #FFFFFF;
}

.page-about .team-node__meta {
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif);
  font-size: 0.75rem;
  color: var(--page-mist);
}

.page-about .team-chart__branches {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 16px;
  position: relative;
  padding-top: 16px;
}

.page-about .team-chart__branches::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 16px;
  background: var(--page-steel);
  transform: translateX(-50%);
}

.page-about .team-branch {
  position: relative;
}

.page-about .team-node--sub {
  border-color: rgba(79, 195, 247, 0.5);
  grid-template-columns: 1fr;
}

.page-about .team-culture__title {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 1.35rem;
  font-weight: 800;
  margin: 0 0 14px;
  color: var(--page-accent);
}

.page-about .team-culture p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin: 0 0 14px;
}

.page-about .team-cta {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
  padding: 24px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  background: linear-gradient(120deg, rgba(0, 230, 118, 0.08) 0%, rgba(79, 195, 247, 0.08) 100%);
}

.page-about .team-cta__text {
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 1.125rem;
  font-weight: 800;
  margin: 0;
  color: #FFFFFF;
}

.page-about .team-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* shared component classes used */
.page-about .btn {
  display: inline-block;
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 0.875rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-decoration: none;
  padding: 12px 22px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.page-about .btn--flame {
  background-color: var(--page-accent-2);
  border-color: var(--page-accent-2);
  color: #0A1128;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.3);
}

.page-about .btn--flame:hover {
  background-color: #FF7D26;
  border-color: #FF7D26;
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.35);
}

.page-about .btn--ghost {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  color: #FFFFFF;
}

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

.page-about .btn--steel {
  background-color: var(--page-steel);
  border-color: var(--page-steel);
  color: #0A1128;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.3);
}

.page-about .btn--steel:hover {
  background-color: #68CDEB;
  border-color: #68CDEB;
  transform: translate(-1px, -1px);
}

.page-about .tag {
  display: inline-block;
  font-family: var(--font-display, "Montserrat", "Noto Sans SC", Arial, sans-serif);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 5px 10px;
  border: 2px solid transparent;
}

.page-about .tag--steel {
  border-color: rgba(79, 195, 247, 0.6);
  color: var(--page-steel);
  background: rgba(79, 195, 247, 0.08);
}

.page-about .tag--flame {
  border-color: rgba(255, 106, 0, 0.6);
  color: #FF8A3D;
  background: rgba(255, 106, 0, 0.08);
}

.page-about .tag--bolt {
  border-color: rgba(156, 39, 176, 0.6);
  color: #CE6AE0;
  background: rgba(156, 39, 176, 0.08);
}

.page-about .live-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--page-accent);
}

.page-about .live-tag__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--page-accent);
  box-shadow: 0 0 0 rgba(0, 230, 118, 0.6);
  animation: page-live-pulse 2s ease-in-out infinite;
}

.page-about .grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap, 16px);
}

@media (min-width: 600px) {
  .page-about .data-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .team-chart__branches {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .team-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero {
    padding-top: 56px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .chapter-nav {
    padding: 18px 28px;
  }

  .page-about .timeline__item {
    grid-template-columns: 160px 1fr;
    gap: 20px;
    padding-left: 0;
  }

  .page-about .timeline::before {
    left: 170px;
  }

  .page-about .timeline__item::before {
    left: 158px;
  }

  .page-about .section__head {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }

  .page-about .section__lede {
    text-align: right;
  }

  .page-about .timeline {
    gap: 36px;
  }
}

@media (min-width: 992px) {
  .page-about .container {
    padding-left: 24px;
    padding-right: 24px;
  }

  .page-about .grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .team-layout {
    grid-template-columns: 1fr 0.9fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .ecosystem-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .live-tag__dot {
    animation: none;
  }

  .page-about .btn {
    transition: none;
  }
}

@keyframes page-live-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.5);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(0, 230, 118, 0);
  }
}