.page-about {
  background: var(--white);
}

.page-about__crumbs {
  padding-top: 20px;
}

/* ===== 头部终端面板 ===== */
.page-about__hero {
  margin-top: 20px;
  padding: 32px 24px;
  background:
    radial-gradient(circle at 85% 10%, rgba(0, 163, 255, 0.35) 0%, transparent 42%),
    linear-gradient(140deg, var(--deep-space) 0%, #1e2a4a 70%, #0f1b33 100%);
  border-radius: 12px;
  color: var(--white);
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 28px;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--sky-blue) 0%, var(--neon-green) 100%);
}

.page-about__hero-copy {
  position: relative;
  z-index: 1;
}

.page-about__hero .eyebrow {
  color: var(--neon-green);
  margin-bottom: 12px;
}

.page-about__hero .page-title {
  color: var(--white);
  font-size: 2rem;
  line-height: 1.25;
  margin-bottom: 14px;
}

.page-about__hero .page-lead {
  color: rgba(255, 255, 255, 0.82);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 0;
}

.page-about__hero-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 0;
}

.page-about__hero-stat {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  padding: 14px 16px;
  min-width: 0;
}

.page-about__hero-stat .stat-label {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  display: block;
  margin-bottom: 4px;
}

.page-about__hero-stat .stat-value {
  color: var(--neon-green);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

/* ===== 主体布局 ===== */
.page-about__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding: 32px 0 56px;
}

.page-about__side-inner {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  gap: 14px;
  align-items: flex-start;
  scrollbar-width: none;
}

.page-about__side-inner::-webkit-scrollbar {
  display: none;
}

.page-about__toc {
  background: var(--light-mist);
  border-left: 3px solid var(--sky-blue);
  padding: 16px 18px;
  flex: 0 0 auto;
  min-width: 200px;
}

.page-about__toc-title {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--sky-blue);
  margin-bottom: 10px;
}

.page-about__toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}

.page-about__toc li {
  white-space: nowrap;
}

.page-about__toc a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 0;
  color: var(--ink);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border-bottom: 1px dashed rgba(15, 23, 42, 0.12);
}

.page-about__toc a:hover {
  color: var(--sky-blue);
}

.page-about__toc a .mono {
  font-size: 0.72rem;
  color: var(--sky-blue);
}

.page-about__side-card {
  display: none;
}

.page-about__content {
  min-width: 0;
}

/* ===== 章节通用 ===== */
.page-about .section {
  margin-bottom: 52px;
}

.page-about__section-lead {
  font-size: 1.05rem;
  line-height: 1.7;
  color: #475569;
  margin: 12px 0 22px;
}

/* ===== 故事 / 时间线 ===== */
.page-about__story-media {
  margin: 0 0 28px;
}

.page-about__story-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  object-fit: cover;
}

.page-about__timeline {
  position: relative;
  padding-left: 26px;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--sky-blue) 0 8px,
    transparent 8px 16px
  );
}

.page-about__timeline-item {
  position: relative;
  margin-bottom: 28px;
}

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

.page-about__timeline-dot {
  position: absolute;
  left: -26px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--neon-green);
  border: 3px solid var(--deep-space);
  box-shadow: 0 0 0 2px var(--sky-blue);
}

.page-about__timeline-card {
  background: var(--light-mist);
  border-radius: 10px;
  padding: 20px;
  border: 1px solid var(--sky-soft);
}

.page-about__timeline-year {
  color: var(--sky-blue);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.page-about__timeline-card h3 {
  font-size: 1.12rem;
  margin-bottom: 8px;
}

.page-about__timeline-card p:last-child {
  margin-bottom: 0;
  color: #475569;
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ===== 关键数据 ===== */
.page-about__numbers-hero {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 20px;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
}

.page-about__numbers-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about__numbers-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.25) 0%, rgba(15, 23, 42, 0.78) 100%);
}

.page-about__numbers-grid {
  position: relative;
  z-index: 1;
  width: 100%;
  margin: 0;
  padding: 30px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.page-about__numbers-grid .stat-label {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.75rem;
  display: block;
  margin-bottom: 4px;
}

.page-about__numbers-grid .stat-value {
  color: var(--neon-green);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-about__numbers-cards {
  margin-top: 20px;
}

.page-about__card-code {
  color: var(--sky-blue);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  margin-bottom: 8px;
}

/* ===== 资质 ===== */
.page-about__cert-grid {
  display: grid;
  gap: 24px;
}

.page-about__cert-list {
  display: grid;
  gap: 16px;
}

.page-about__cert-item {
  display: flex;
  gap: 16px;
  background: var(--light-mist);
  border-radius: 10px;
  padding: 20px;
  border-left: 3px solid var(--sky-blue);
}

.page-about__cert-badge {
  flex: 0 0 auto;
  min-width: 56px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--deep-space);
  color: var(--neon-green);
  font-weight: 700;
  border-radius: 6px;
  padding: 0 10px;
}

.page-about__cert-body h3 {
  font-size: 1.02rem;
  margin-bottom: 6px;
}

.page-about__cert-body p {
  margin: 0;
  color: #475569;
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-about__cert-figure {
  margin: 0;
}

.page-about__cert-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
}

/* ===== 团队 ===== */
.page-about__team-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  background: var(--light-mist);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
}

.page-about__team-count {
  font-size: 2rem;
  font-weight: 800;
  color: var(--sky-blue);
  white-space: nowrap;
  margin: 0;
}

.page-about__team-summary p:last-child {
  margin: 0;
  flex: 1;
  min-width: 220px;
  color: #475569;
  line-height: 1.7;
}

.page-about__team-cards {
  margin-bottom: 20px;
}

.page-about__team-cards .card-glass {
  height: 100%;
}

.page-about__team-role {
  color: var(--neon-green-deep);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  margin-bottom: 8px;
}

.page-about__philosophy {
  background: var(--deep-space);
  border-radius: 12px;
  color: var(--white);
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
}

.page-about__philosophy::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 163, 255, 0.35) 0%, transparent 70%);
}

.page-about__philosophy h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.page-about__philosophy p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ===== CTA ===== */
.page-about__cta {
  margin-top: 8px;
}

.page-about__cta-inner {
  background: linear-gradient(135deg, var(--sky-blue) 0%, #0077cc 100%);
  border-radius: 12px;
  color: var(--white);
  padding: 32px 24px;
  text-align: center;
}

.page-about__cta-inner h2 {
  font-size: 1.4rem;
  margin-bottom: 10px;
}

.page-about__cta-inner p {
  margin: 0 auto 20px;
  max-width: 520px;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.7;
}

.page-about__cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* ===== 桌面端 ===== */
@media (min-width: 1024px) {
  .page-about__hero {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    padding: 44px 48px;
    gap: 48px;
  }

  .page-about__hero .page-title {
    font-size: 2.5rem;
  }

  .page-about__hero .page-lead {
    font-size: 1.05rem;
  }

  .page-about__hero-stats {
    gap: 16px;
  }

  .page-about__layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 48px;
    padding-top: 44px;
  }

  .page-about__side {
    position: sticky;
    top: 24px;
    align-self: start;
  }

  .page-about__side-inner {
    display: block;
    overflow: visible;
    gap: 0;
  }

  .page-about__toc {
    margin-bottom: 20px;
  }

  .page-about__toc ul {
    display: block;
  }

  .page-about__toc li {
    white-space: normal;
  }

  .page-about__toc a {
    display: flex;
    width: 100%;
  }

  .page-about__side-card {
    display: block;
    padding: 18px;
  }

  .page-about__side-card p:first-child {
    color: var(--sky-blue);
    font-weight: 800;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
  }

  .page-about__side-card p:nth-child(2) {
    font-size: 0.85rem;
    color: #475569;
    line-height: 1.6;
    margin-bottom: 14px;
  }

  .page-about__numbers-hero {
    min-height: 360px;
  }

  .page-about__numbers-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding: 36px 32px;
  }

  .page-about__numbers-grid .stat-value {
    font-size: 2.2rem;
  }

  .page-about__cert-grid {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 32px;
    align-items: start;
  }

  .page-about__cert-figure {
    position: sticky;
    top: 24px;
  }
}