.page-about {
  --about-line-color: rgba(57,255,20,.45);
  --about-metric-bg: rgba(27,42,74,.35);
  --about-card-bg: rgba(255,255,255,.025);
  --about-card-border: #1B2A4A;
  --about-card-border-hover: rgba(57,255,20,.4);
  --about-num-size: 1rem;
  background: transparent;
  position: relative;
}

.page-about .container-face {
  position: relative;
  z-index: 1;
}

/* ---------- 页面上下文条 ---------- */
.page-about .about-context {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: var(--space-4);
  padding-bottom: var(--space-2);
  flex-wrap: wrap;
}

.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--color-text-dim);
}

.page-about .about-breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-about .about-breadcrumb a:hover,
.page-about .about-breadcrumb a:focus-visible {
  color: var(--color-text);
  text-decoration: underline;
}

.page-about .about-breadcrumb-sep {
  color: var(--color-border);
  user-select: none;
}

.page-about .about-icp {
  background: var(--about-metric-bg);
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: .75rem;
  border: 1px solid var(--about-card-border);
}

/* ---------- 首屏分屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 40px;
  right: -80px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(57,255,20,.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero-grid {
  display: grid;
  gap: var(--space-6);
  padding-top: var(--space-5);
  padding-bottom: var(--space-8);
  align-items: start;
}

.page-about .about-hero-narrative {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
}

.page-about .about-hero-visual-wrap {
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--about-card-border);
  border-radius: var(--radius-cut);
  background: var(--about-card-bg);
}

.page-about .about-hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  transition: filter var(--transition-base);
}

.page-about .about-hero-visual-wrap:hover .about-hero-img {
  filter: saturate(1.2) contrast(1.05);
}

.page-about .about-lead {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text-dim);
  max-width: 62ch;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---------- 右侧指标面板 ---------- */
.page-about .about-hero-panel {
  min-width: 0;
}

.page-about .about-hero-panel-inner {
  padding: var(--space-5);
  background: var(--about-metric-bg);
  border: 1px solid var(--about-card-border);
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.page-about .about-hero-panel-inner .mono-meta {
  display: block;
  margin-bottom: var(--space-4);
  color: var(--color-accent);
}

.page-about .about-metric-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.page-about .about-metric-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: rgba(255,255,255,.03);
  border-left: 2px solid var(--color-accent);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.page-about .about-metric-item:hover,
.page-about .about-metric-item:focus-within {
  background: rgba(57,255,20,.06);
  border-left-color: var(--color-secondary);
}

.page-about .about-metric-num {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.1;
  letter-spacing: -.02em;
}

.page-about .about-metric-label {
  font-size: .85rem;
  color: var(--color-text-dim);
  line-height: 1.4;
}

/* ---------- 雷达图 ---------- */
.page-about .about-radar-wrap {
  margin-top: var(--space-5);
  display: flex;
  justify-content: center;
}

.page-about .about-radar {
  width: 100%;
  max-width: 240px;
  height: auto;
}

.page-about .about-radar-grid {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 1.5;
}

.page-about .about-radar-grid-mid {
  stroke-width: 1;
}

.page-about .about-radar-data {
  fill: rgba(57,255,20,.2);
  stroke: var(--color-accent);
  stroke-width: 2;
  stroke-linejoin: round;
}

.page-about .about-radar-dot {
  fill: var(--color-accent);
}

.page-about .about-radar-legend {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  font-size: .78rem;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
}

.page-about .about-radar-legend li {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.page-about .legend-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ---------- 品牌使命 ---------- */
.page-about .about-mission {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  border-top: 1px solid rgba(27,42,74,.5);
}

.page-about .about-two-col {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

.page-about .about-mission-copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.page-about .about-mission-copy p {
  line-height: 1.85;
  color: var(--color-text-dim);
  max-width: 70ch;
}

.page-about .about-mission-copy h2,
.page-about .about-timeline h2,
.page-about .about-certifications h2,
.page-about .about-team h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.2;
  color: var(--color-text);
  margin: 0;
}

.page-about .about-mission-quote {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-3);
  border-left: 3px solid var(--color-accent);
  background: rgba(240,244,250,.04);
}

.page-about .about-mission-quote-text {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--color-text);
  font-style: italic;
}

.page-about .about-mission-quote .mono-note {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--color-text-dim);
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-timeline {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  position: relative;
}

.page-about .about-timeline::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 120px;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0 10px,
    rgba(57,255,20,.03) 10px 12px
  );
  pointer-events: none;
}

.page-about .about-timeline .section-head {
  margin-bottom: var(--space-8);
}

.page-about .about-timeline-layout {
  display: grid;
  gap: var(--space-8);
}

.page-about .about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 8px;
  bottom: 8px;
  width: 4px;
  background: repeating-linear-gradient(
    -45deg,
    rgba(57,255,20,.5) 0 2px,
    transparent 2px 8px
  );
  opacity: .55;
  border-radius: 2px;
}

.page-about .about-timeline-item {
  position: relative;
  padding-left: 68px;
  margin-bottom: var(--space-6);
}

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

.page-about .about-milestone-num {
  position: absolute;
  left: 0;
  top: 4px;
  width: 54px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--about-num-size);
  font-weight: 700;
  color: var(--color-accent);
  background: var(--color-primary);
  border: 2px solid var(--color-accent);
  border-radius: 12px 2px 12px 2px;
  z-index: 1;
  letter-spacing: .04em;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.page-about .about-timeline-item:hover .about-milestone-num {
  background: var(--color-accent);
  color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.page-about .about-milestone-card {
  padding: var(--space-5);
  background: var(--about-card-bg);
  border: 1px solid var(--about-card-border);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.page-about .about-timeline-item:hover .about-milestone-card,
.page-about .about-timeline-item:focus-within .about-milestone-card {
  border-color: var(--about-card-border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateX(4px);
}

.page-about .about-milestone-card h3 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.15rem;
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}

.page-about .about-milestone-card p {
  margin: 0;
  line-height: 1.7;
  color: var(--color-text-dim);
  font-size: .95rem;
}

.page-about .about-milestone-more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin: 0 !important;
  transition: max-height var(--transition-base), opacity var(--transition-base), margin-top var(--transition-base), padding-top var(--transition-base);
}

.page-about .about-timeline-item:hover .about-milestone-more,
.page-about .about-timeline-item:focus-within .about-milestone-more {
  max-height: 120px;
  opacity: 1;
  margin-top: var(--space-3) !important;
  padding-top: var(--space-3);
  border-top: 1px dashed rgba(57,255,20,.2);
}

.page-about .about-timeline-note {
  min-width: 0;
}

.page-about .about-timeline-note-inner {
  padding: var(--space-6);
  background: var(--about-metric-bg);
  border: 1px solid var(--about-card-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: flex-start;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.page-about .about-timeline-note-inner .mono-meta {
  color: var(--color-accent);
  font-size: .78rem;
}

.page-about .about-timeline-note-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
  line-height: 1.5;
}

.page-about .about-timeline-note-inner p:last-child {
  color: var(--color-text-dim);
  line-height: 1.75;
  margin: 0;
}

/* ---------- 资质与认证 ---------- */
.page-about .about-certifications {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  border-top: 1px solid rgba(27,42,74,.5);
  position: relative;
}

.page-about .about-certifications::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(to bottom, rgba(57,255,20,.5), rgba(27,42,74,0));
  opacity: .4;
}

.page-about .about-certifications .section-head {
  margin-bottom: var(--space-8);
}

.page-about .about-cert-grid {
  display: grid;
  gap: var(--space-5);
}

.page-about .about-cert-card {
  padding: var(--space-5);
  background: var(--about-card-bg);
  border: 1px solid var(--about-card-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: flex-start;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.page-about .about-cert-card:hover,
.page-about .about-cert-card:focus-within {
  border-color: var(--about-card-border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.page-about .about-cert-thumb {
  width: 100%;
  max-width: 200px;
  height: auto;
  object-fit: cover;
  border-radius: 8px 2px 8px 2px;
  border: 1px solid var(--about-card-border);
}

.page-about .about-cert-card h3 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.05rem;
  margin: 0;
  color: var(--color-text);
}

.page-about .about-cert-card p {
  margin: 0;
  line-height: 1.75;
  color: var(--color-text-dim);
  font-size: .92rem;
}

.page-about .about-cert-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(57,255,20,.06);
  border: 1px solid rgba(57,255,20,.25);
  border-radius: 14px 2px 14px 2px;
}

.page-about .about-cert-icon-svg {
  width: 48px;
  height: 48px;
  display: block;
}

/* ---------- 团队与规模 ---------- */
.page-about .about-team {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  border-top: 1px solid rgba(27,42,74,.5);
}

.page-about .about-team-layout {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

.page-about .about-team-copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
}

.page-about .about-team-copy h2 {
  margin-bottom: var(--space-1);
}

.page-about .about-team-copy p {
  color: var(--color-text-dim);
  line-height: 1.85;
  max-width: 68ch;
}

.page-about .about-team-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-2);
}

.page-about .about-team-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  background: var(--about-metric-bg);
  border: 1px solid var(--about-card-border);
  border-left: 3px solid var(--color-accent);
  min-width: 120px;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.page-about .about-team-stat:hover,
.page-about .about-team-stat:focus-within {
  border-color: var(--about-card-border-hover);
  background: rgba(57,255,20,.05);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.05;
  letter-spacing: -.02em;
}

.page-about .about-stat-label {
  font-size: .85rem;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
}

.page-about .about-team-visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: flex-start;
}

.page-about .about-team-img-wrap {
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--about-card-border);
  border-radius: var(--radius-cut);
  background: var(--about-card-bg);
}

.page-about .about-team-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform var(--transition-base), filter var(--transition-base);
}

.page-about .about-team-img-wrap:hover .about-team-img {
  transform: scale(1.02);
  filter: saturate(1.15);
}

.page-about .about-team-caption {
  font-size: .8rem;
  color: var(--color-text-dim);
}

/* ---------- 行动号召 ---------- */
.page-about .about-cta {
  padding-top: var(--space-8);
  padding-bottom: var(--space-10);
  border-top: 1px solid rgba(27,42,74,.5);
}

.page-about .about-cta-panel {
  padding: var(--space-8) var(--space-6);
  background: linear-gradient(135deg, rgba(27,42,74,.55) 0%, rgba(10,25,47,.92) 70%);
  border: 1px solid var(--about-card-border);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
  position: relative;
  overflow: hidden;
}

.page-about .about-cta-panel::before {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 180px;
  height: 180px;
  border: 2px dashed rgba(57,255,20,.18);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .about-cta-panel::after {
  content: "";
  position: absolute;
  right: 20px;
  bottom: -30px;
  width: 100px;
  height: 60px;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0 6px,
    rgba(255,51,51,.2) 6px 8px
  );
  pointer-events: none;
}

.page-about .about-cta-panel h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.25;
  color: var(--color-text);
  margin: 0;
  max-width: 22ch;
}

.page-about .about-cta-panel p {
  color: var(--color-text-dim);
  line-height: 1.75;
  margin: 0;
  max-width: 62ch;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
  position: relative;
  z-index: 1;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.15fr .85fr;
    gap: var(--space-8);
  }

  .page-about .about-two-col {
    grid-template-columns: 1.2fr .8fr;
    gap: var(--space-8);
  }

  .page-about .about-timeline-layout {
    grid-template-columns: 1.2fr .8fr;
    gap: var(--space-8);
  }

  .page-about .about-cert-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }

  .page-about .about-team-layout {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
  }

  .page-about .about-cta-panel {
    padding: var(--space-10) var(--space-8);
  }

  .page-about .about-metric-list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .page-about .about-metric-list {
    grid-template-columns: 1fr;
  }

  .page-about .about-milestone-num {
    width: 46px;
    font-size: .88rem;
  }

  .page-about .about-timeline-item {
    padding-left: 58px;
  }

  .page-about .about-timeline-list::before {
    left: 23px;
  }

  .page-about .about-team-stats {
    flex-direction: column;
    width: 100%;
  }

  .page-about .about-team-stat {
    min-width: 0;
  }
}