.page-about {
  --ab-corner: 24px;
  background: var(--color-bg-dark);
  color: var(--color-text-light);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

.page-about .ab-wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: clamp(20px, 4vw, 48px);
  padding-right: clamp(20px, 4vw, 48px);
}

.page-about section {
  padding: clamp(72px, 12vw, 136px) 0;
}

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

.page-about .ab-hero {
  position: relative;
  padding-top: clamp(48px, 8vw, 96px);
  padding-bottom: clamp(64px, 10vw, 120px);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 40%, var(--color-purple-start) 100%);
}

.page-about .ab-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .ab-hero-title {
  font-family: var(--font-title);
  font-size: clamp(2.75rem, 7vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  margin: 18px 0 0;
  text-wrap: balance;
}

.page-about .ab-hero-kicker {
  margin-top: 18px;
}

.page-about .ab-hero-lead {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 720px;
  margin: 24px 0 0;
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.page-about .ab-hero-visual {
  position: relative;
}

.page-about .ab-hero-visual::before {
  content: "";
  position: absolute;
  right: 8px;
  top: -16px;
  width: 112px;
  height: 112px;
  background: var(--color-primary);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  z-index: 0;
}

.page-about .ab-hero-img-wrap {
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 96% 100%, 4% 100%);
  background: var(--color-bg-card);
  z-index: 1;
}

.page-about .ab-hero-img {
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-section-head {
  margin-bottom: clamp(40px, 7vw, 64px);
}

.page-about .ab-section-title {
  font-family: var(--font-title);
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.06;
  margin: 14px 0 0;
  text-wrap: balance;
}

.page-about .ab-mission {
  position: relative;
  background: var(--color-bg-light);
  color: var(--color-bg-dark);
  overflow: hidden;
}

.page-about .ab-mission .ab-section-title {
  color: var(--color-bg-dark);
}

.page-about .ab-mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .ab-mission-main p,
.page-about .ab-mission-scene p {
  margin: 0 0 16px;
  font-size: clamp(1rem, 2vw, 1.1rem);
}

.page-about .ab-mission-main {
  background: var(--color-bg-dark);
  color: var(--color-text-light);
  border-radius: var(--ab-corner);
  padding: clamp(28px, 5vw, 48px);
  position: relative;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
}

.page-about .ab-mission-main::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
  border-radius: 6px 0 0 6px;
}

.page-about .ab-mission-scene {
  align-self: end;
  border-left: 4px solid var(--color-primary);
  padding-left: 24px;
}

.page-about .ab-timeline {
  position: relative;
}

.page-about .ab-timeline-list {
  position: relative;
  display: grid;
  gap: 56px;
  margin: 0;
}

.page-about .ab-timeline-list::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 10px;
  width: 3px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent) 50%, var(--color-bg-card));
  border-radius: 4px;
}

.page-about .ab-tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding-left: 32px;
}

.page-about .ab-tl-item::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 18px;
  height: 18px;
  background: var(--color-accent);
  border: 4px solid var(--color-primary);
  transform: rotate(45deg);
  z-index: 2;
}

.page-about .ab-tl-num {
  font-family: var(--font-title);
  font-size: clamp(3rem, 6vw, 6rem);
  line-height: 1;
  color: var(--color-primary);
}

.page-about .ab-tl-body {
  position: relative;
}

.page-about .ab-tl-body h3 {
  font-family: var(--font-title);
  font-size: 1.6rem;
  margin: 8px 0;
}

.page-about .ab-tl-body p {
  color: var(--color-text-muted);
  margin: 0;
}

.page-about .ab-data {
  background: var(--color-bg-card);
  position: relative;
  overflow: hidden;
}

.page-about .ab-data::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, var(--color-purple-start), var(--color-purple-end));
  opacity: 0.3;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.page-about .ab-data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .ab-data-img-frame {
  position: relative;
  border-bottom: 6px solid var(--color-primary);
}

.page-about .ab-data-img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .ab-data-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.page-about .ab-data-item {
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  padding: 22px 18px;
  position: relative;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .ab-data-item:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.page-about .ab-data-item dt {
  font-family: var(--font-title);
  font-size: clamp(1.6rem, 4vw, 3rem);
  line-height: 1;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.page-about .ab-data-item dd {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.page-about .ab-certs {
  background: var(--color-bg-dark);
}

.page-about .ab-certs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .ab-cert-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: linear-gradient(135deg, var(--color-bg-card), rgba(18, 41, 75, 0.4));
  border: 1px solid var(--color-border);
  padding: 32px;
  position: relative;
  overflow: hidden;
  min-height: 220px;
}

.page-about .ab-cert-card::after {
  content: "";
  position: absolute;
  right: -16px;
  bottom: -16px;
  width: 80px;
  height: 80px;
  border-right: 6px solid var(--color-accent);
  border-bottom: 6px solid var(--color-accent);
  opacity: 0.6;
}

.page-about .ab-cert-mark {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary);
  font-family: var(--font-title);
  font-size: 1.1rem;
  color: var(--color-bg-dark);
  margin-bottom: 24px;
}

.page-about .ab-cert-card:nth-child(2) .ab-cert-mark {
  background: var(--color-accent);
}

.page-about .ab-cert-card:nth-child(3) .ab-cert-mark {
  background: linear-gradient(135deg, var(--color-purple-start), var(--color-purple-end));
  color: #fff;
}

.page-about .ab-cert-card:nth-child(4) .ab-cert-mark {
  background: var(--color-text-light);
}

.page-about .ab-cert-card h3 {
  font-family: var(--font-title);
  font-size: 1.3rem;
  margin: 0 0 10px;
}

.page-about .ab-cert-card p {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 0.95rem;
}

.page-about .ab-team {
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-card) 70%, rgba(139, 92, 246, 0.2) 100%);
}

.page-about .ab-team-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.page-about .ab-team-lead {
  max-width: 640px;
}

.page-about .ab-team-roles {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 24px 0 32px;
}

.page-about .ab-team-roles li {
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
  padding: 8px 14px;
  font-size: 0.9rem;
}

.page-about .ab-team-roles li::before {
  content: "●";
  color: var(--color-primary);
  margin-right: 6px;
  font-size: 0.7rem;
}

.page-about .ab-team-img-frame {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
}

.page-about .ab-team-img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.page-about .ab-team-img-frame:hover .ab-team-img {
  transform: scale(1.03);
}

.page-about .ab-outro {
  position: relative;
}

.page-about .ab-outro::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
}

.page-about .ab-outro-box {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 8px solid var(--color-primary);
  padding: clamp(32px, 6vw, 64px);
  position: relative;
  overflow: hidden;
}

.page-about .ab-outro-box::after {
  content: "BAOWEI";
  position: absolute;
  right: -8px;
  bottom: -30px;
  font-family: var(--font-title);
  font-size: 6rem;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(244, 248, 252, 0.08);
  line-height: 1;
  z-index: 0;
}

.page-about .ab-outro-box h2 {
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin: 0;
}

.page-about .ab-outro-box p {
  color: var(--color-text-muted);
  margin: 0;
  max-width: 720px;
}

.page-about .ab-outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
  position: relative;
  z-index: 2;
}

@media (min-width: 620px) {
  .page-about .ab-data-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 720px) {
  .page-about .ab-certs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 860px) {
  .page-about .ab-mission-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 72px;
  }

  .page-about .ab-timeline-list {
    gap: 80px;
  }

  .page-about .ab-timeline-list::before {
    left: 260px;
  }

  .page-about .ab-tl-item {
    grid-template-columns: 260px 1fr;
    gap: 60px;
    padding-left: 0;
  }

  .page-about .ab-tl-item::after {
    left: 251px;
  }

  .page-about .ab-tl-num {
    text-align: right;
    padding-right: 60px;
  }
}

@media (min-width: 920px) {
  .page-about .ab-hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 64px;
    align-items: center;
  }

  .page-about .ab-hero-copy {
    margin-bottom: 0;
  }

  .page-about .ab-team-inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 80px;
  }
}

@media (min-width: 960px) {
  .page-about .ab-data-grid {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 80px;
    align-items: center;
  }
}