.page-about {
  --about-panel-radius: 32px;
  --about-panel-pad: clamp(1.5rem, 4vw, 3.25rem);
}

/* ===== 页面目录 ===== */
.page-about .about-toc-wrap {
  margin-top: 1.5rem;
}
.page-about .about-toc-wrap .toc {
  overflow-x: auto;
  scrollbar-width: thin;
  flex-wrap: nowrap;
  justify-content: flex-start;
}
.page-about .about-toc-wrap .toc::-webkit-scrollbar {
  height: 4px;
}
.page-about .about-toc-wrap .toc::-webkit-scrollbar-thumb {
  background: var(--color-line);
  border-radius: 4px;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: clamp(2rem, 6vw, 4.5rem) 0 0;
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -140px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(255, 107, 0, 0.14), rgba(255, 107, 0, 0) 68%);
  border-radius: 50%;
  pointer-events: none;
}
.page-about .about-hero-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
  padding-top: 1.5rem;
}
.page-about .about-hero h1 {
  margin: 1rem 0;
  font-size: clamp(2.1rem, 5vw, 3.55rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.page-about .about-hero-lead {
  color: var(--color-muted);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.75;
  max-width: 36em;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}
.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem 1rem;
  margin: 2.5rem 0 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--color-line);
}
.page-about .about-hero-stats div {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.page-about .about-hero-stats dt {
  font-size: 0.75rem;
  color: var(--color-muted);
}
.page-about .about-hero-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-ink);
}
.page-about .about-hero-stats .stat-num {
  font-size: inherit;
}

/* ===== 媒体容器（页面专属） ===== */
.page-about .about-media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-line);
  box-shadow: var(--shadow-card);
}
.page-about .about-media img {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-media figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  background: var(--color-surface);
  text-align: center;
}

/* ===== 品牌定位 ===== */
.page-about .about-position {
  padding: clamp(3rem, 8vw, 5.5rem) 0;
}
.page-about .about-position-inner {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--about-panel-radius);
  box-shadow: var(--shadow-card);
  padding: var(--about-panel-pad);
  overflow: hidden;
}
.page-about .about-position-inner::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2.5rem;
  bottom: 2.5rem;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-primary));
}
.page-about .about-position-lead {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.75;
  color: var(--color-ink);
  font-weight: 500;
}
.page-about .about-position-body p {
  line-height: 1.75;
}
.page-about .about-quote {
  margin: 2rem 0 0;
  padding: 1.5rem 1.75rem;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--color-primary-dark);
}
.page-about .about-quote p {
  margin: 0;
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestones {
  background: var(--color-bg);
  padding: clamp(3rem, 8vw, 5.5rem) 0;
}
.page-about .about-spikes {
  display: block;
  width: min(320px, 100%);
  height: auto;
  margin: 1.5rem auto 0;
}
.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 1rem;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.75rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--color-primary) 0 6px,
    var(--color-line) 6px 12px
  );
}
.page-about .timeline-item {
  position: relative;
  padding-left: 2.5rem;
}
.page-about .timeline-node {
  position: absolute;
  left: 0;
  top: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.page-about .timeline-dot {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--color-surface);
  border: 3px solid var(--color-primary);
  flex: 0 0 auto;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}
.page-about .timeline-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-primary);
  background: var(--color-surface);
  border-radius: var(--radius-pill);
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--color-line);
  white-space: nowrap;
}
.page-about .timeline-card {
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.page-about .timeline-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}
.page-about .timeline-card p {
  margin: 0;
  line-height: 1.7;
}
.page-about .timeline-detail {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 0.9rem;
  transition: color 0.25s ease, border-top-color 0.25s ease;
}
.page-about .timeline-item:hover .timeline-dot,
.page-about .timeline-item:focus-within .timeline-dot {
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: scale(1.15);
}
.page-about .timeline-item:hover .timeline-card,
.page-about .timeline-item:focus-within .timeline-card {
  border-color: var(--color-primary);
  box-shadow: 0 18px 40px -18px rgba(0, 82, 204, 0.3);
}
.page-about .timeline-item:hover .timeline-detail,
.page-about .timeline-item:focus-within .timeline-detail {
  color: var(--color-ink);
  border-top-color: var(--color-accent);
}

/* ===== 核心团队 ===== */
.page-about .about-team {
  padding: clamp(3rem, 8vw, 5.5rem) 0;
}
.page-about .about-team-panel {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #ffffff;
  border-radius: var(--about-panel-radius);
  padding: var(--about-panel-pad);
  display: grid;
  gap: 2rem;
  overflow: hidden;
}
.page-about .about-team-panel .eyebrow {
  color: var(--color-highlight);
}
.page-about .about-team-panel h2 {
  color: #ffffff;
}
.page-about .about-team-panel > .about-team-content > p {
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.7;
}
.page-about .about-team-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}
.page-about .about-team-list li {
  border-left: 2px solid rgba(255, 255, 255, 0.3);
  padding-left: 1.25rem;
}
.page-about .about-team-list h3 {
  color: #ffffff;
  font-size: 1.1rem;
  margin: 0 0 0.35rem;
}
.page-about .about-team-list p {
  color: rgba(255, 255, 255, 0.82);
  margin: 0;
  line-height: 1.65;
}
.page-about .about-media-team {
  border: 4px solid rgba(255, 255, 255, 0.2);
  box-shadow: none;
}
.page-about .about-media-team figcaption {
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.85);
}

/* ===== 技术平台 ===== */
.page-about .about-technology {
  padding: 0 0 clamp(3rem, 8vw, 5.5rem);
}
.page-about .about-tech-frame {
  background: var(--color-ink);
  color: var(--color-surface);
  border-radius: var(--about-panel-radius);
  padding: var(--about-panel-pad);
}
.page-about .about-tech-frame .eyebrow {
  color: var(--color-highlight);
}
.page-about .about-tech-frame h2 {
  color: #ffffff;
}
.page-about .about-tech-frame > .section-head p:last-child {
  color: rgba(255, 255, 255, 0.7);
}
.page-about .about-tech-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}
.page-about .about-tech-copy > p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.75;
}
.page-about .about-tech-points {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.75rem;
}
.page-about .about-tech-point {
  border-left: 3px solid var(--color-accent);
  padding-left: 1.25rem;
}
.page-about .about-tech-point h3 {
  color: #ffffff;
  font-size: 1.05rem;
  margin: 0 0 0.35rem;
}
.page-about .about-tech-point p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.78);
}
.page-about .about-tech-index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-highlight);
  display: block;
  margin-bottom: 0.25rem;
}
.page-about .about-tech-point .badge-live {
  display: inline-block;
  margin-bottom: 0.35rem;
}
.page-about .about-media-tech {
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: none;
}
.page-about .about-media-tech figcaption {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.65);
}

/* ===== 合作伙伴 ===== */
.page-about .about-partners {
  padding: clamp(3rem, 8vw, 5.5rem) 0;
}
.page-about .about-partner-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2.5rem;
}
.page-about .about-partner-item {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.5rem;
  text-align: center;
  outline: none;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.page-about .about-partner-item:hover,
.page-about .about-partner-item:focus-within {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: 0 16px 36px -20px rgba(0, 82, 204, 0.35);
}
.page-about .about-partner-logo {
  display: inline-grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-bg);
  color: var(--color-primary);
  margin-bottom: 1rem;
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1), background 0.35s ease, color 0.35s ease;
}
.page-about .about-partner-item:hover .about-partner-logo,
.page-about .about-partner-item:focus-within .about-partner-logo {
  transform: rotate(10deg) scale(1.06);
  background: var(--color-accent);
  color: #ffffff;
}
.page-about .about-partner-item h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}
.page-about .about-partner-item p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.65;
  font-size: 0.92rem;
}

/* ===== 荣誉证书 ===== */
.page-about .about-honors {
  padding: 0 0 clamp(3rem, 8vw, 5.5rem);
}
.page-about .about-honor-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2.5rem;
}
.page-about .about-honor-card {
  background: var(--color-surface);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-card);
}
.page-about .about-honor-num {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.5rem;
}
.page-about .about-honor-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}
.page-about .about-honor-card p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.65;
  font-size: 0.92rem;
}
.page-about .about-honor-note {
  margin: 2rem 0 0;
  color: var(--color-muted);
  line-height: 1.7;
}
.page-about .about-honors .btn {
  margin-top: 1.25rem;
}

/* ===== 桌面端布局增强 ===== */
@media (min-width: 768px) {
  .page-about .about-toc-wrap .toc {
    flex-wrap: wrap;
    justify-content: center;
    overflow: visible;
  }
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
  .page-about .about-hero-stats dd {
    font-size: 1.5rem;
  }
  .page-about .about-media-hero {
    transform: rotate(-1.5deg);
  }
  .page-about .about-timeline {
    gap: 2.25rem;
  }
  .page-about .about-timeline::before {
    left: 1rem;
  }
  .page-about .timeline-item {
    padding-left: 3.5rem;
  }
  .page-about .timeline-dot {
    width: 2rem;
    height: 2rem;
  }
  .page-about .timeline-year {
    font-size: 1rem;
    padding: 0.35rem 1rem;
  }
  .page-about .about-team-panel {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }
  .page-about .about-tech-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  }
  .page-about .about-partner-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-honor-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-partner-logo,
  .page-about .timeline-dot {
    transition: none;
    transform: none;
  }
}