.page-about {
  --track-w: 132px;
}

/* ----- 首屏：品牌定位 ----- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  margin-bottom: 2.5rem;
  padding: 2rem 1.25rem;
  background:
    linear-gradient(145deg, rgba(255, 107, 53, 0.16) 0%, transparent 42%),
    linear-gradient(115deg, var(--navy) 55%, var(--slate) 100%);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-md);
}

.page-about .about-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 46px solid var(--orange);
  border-left: 46px solid transparent;
  opacity: 0.92;
}

.page-about .hero-copy,
.page-about .hero-meta {
  position: relative;
  z-index: 1;
}

.page-about .hero-copy .mono-label {
  color: var(--gold);
  letter-spacing: 0.08em;
}

.page-about .hero-copy h1 {
  margin: 0.6rem 0 0.9rem;
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 4.6vw, 2.7rem);
  line-height: 1.12;
  color: var(--cream);
  letter-spacing: 0.01em;
}

.page-about .hero-lede {
  margin: 0;
  max-width: 44rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--smoke);
}

.page-about .hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-about .hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  margin-top: 1.75rem;
}

.page-about .hero-meta::before {
  content: '';
  grid-column: 1 / -1;
  display: block;
  height: 6px;
  border-radius: 3px;
  background: repeating-linear-gradient(135deg, var(--orange) 0 10px, transparent 10px 20px);
  opacity: 0.75;
}

.page-about .hero-stat {
  padding: 0.9rem 0.75rem;
  background: rgba(18, 24, 32, 0.42);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-sm);
  text-align: center;
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(1.2rem, 3.4vw, 1.9rem);
  line-height: 1.1;
  color: var(--orange);
}

.page-about .stat-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.72rem;
  color: var(--smoke);
  letter-spacing: 0.03em;
}

/* ----- 侧边时间轨与内容主体 ----- */
.page-about .about-track-wrap {
  display: block;
}

.page-about .about-track {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.65rem;
  margin-bottom: 1.75rem;
  scroll-snap-type: x proximity;
}

.page-about .about-track::-webkit-scrollbar,
.page-about .timeline-scroll::-webkit-scrollbar {
  height: 4px;
}

.page-about .about-track::-webkit-scrollbar-thumb,
.page-about .timeline-scroll::-webkit-scrollbar-thumb {
  background: var(--slate);
  border-radius: 4px;
}

.page-about .track-node {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.85rem;
  border: 1px solid var(--line-faint);
  border-radius: 999px;
  color: var(--smoke);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s var(--ease-nav), border-color 0.25s var(--ease-nav), background 0.25s var(--ease-nav);
}

.page-about .track-node:hover,
.page-about .track-node:focus {
  color: var(--orange);
  border-color: var(--orange);
  background: rgba(255, 107, 53, 0.08);
}

.page-about .track-node:active {
  background: rgba(255, 107, 53, 0.12);
}

.page-about .track-line {
  display: none;
}

.page-about .about-track-main {
  display: flex;
  flex-direction: column;
}

.page-about .about-section {
  padding: 0.25rem 0 1rem;
}

.page-about .section-head {
  margin-bottom: 0.75rem;
}

.page-about .section-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 2.4vw, 1.8rem);
  line-height: 1.2;
  color: var(--cream);
  letter-spacing: 0.02em;
}

.page-about .section-lead {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .about-section p {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--smoke);
}

/* ----- 品牌故事要点 ----- */
.page-about .story-points {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.page-about .story-point {
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--orange);
  background: rgba(46, 58, 74, 0.35);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .story-point .mono-label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--gold);
  font-size: 0.74rem;
}

.page-about .story-point p {
  margin: 0;
  font-size: 0.88rem;
}

/* ----- 横向时间线 ----- */
.page-about .timeline-scroll {
  margin: 1.5rem 0;
  padding-bottom: 0.5rem;
  overflow-x: auto;
}

.page-about .timeline-track {
  display: flex;
  gap: 1rem;
  min-width: max-content;
  list-style: none;
  margin: 0;
  padding: 2rem 0 0.5rem;
  position: relative;
}

.page-about .timeline-track::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 24px;
  height: 2px;
  background: var(--line-faint);
}

.page-about .timeline-item {
  position: relative;
  flex: 0 0 210px;
}

.page-about .tl-year {
  position: absolute;
  top: -2rem;
  left: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-about .tl-dot {
  position: absolute;
  top: 16px;
  left: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--navy);
  border: 2px solid var(--orange);
  z-index: 1;
}

.page-about .tl-card {
  margin-top: 2.2rem;
  padding: 1rem 1.1rem;
  background: rgba(46, 58, 74, 0.4);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-sm);
  transition: border-color 0.25s var(--ease-nav), transform 0.25s var(--ease-nav);
}

.page-about .timeline-item:hover .tl-card,
.page-about .timeline-item:focus-within .tl-card {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.page-about .tl-card h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-head);
  font-size: 0.98rem;
  line-height: 1.3;
  color: var(--cream);
}

.page-about .tl-card p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--smoke);
}

/* ----- 视觉框架图片 ----- */
.page-about .visual-frame {
  margin: 1.5rem 0 0;
}

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

/* ----- 团队卡片 ----- */
.page-about .team-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(104px, 1fr));
  gap: 0.85rem;
  margin: 1.5rem 0;
}

.page-about .team-card {
  padding: 1.15rem 0.6rem;
  text-align: center;
  background: rgba(46, 58, 74, 0.4);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-md);
}

.page-about .team-card .mono-label {
  display: block;
  font-size: 0.72rem;
  color: var(--gold);
}

.page-about .team-card strong {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-head);
  font-size: 1.8rem;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .team-card span:last-child {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.75rem;
  color: var(--smoke);
}

.page-about .about-media-row {
  margin-top: 0.5rem;
}

/* ----- 资质与荣誉 ----- */
.page-about .honor-list {
  list-style: none;
  margin: 1.25rem 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

.page-about .honor-item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.65rem 0.85rem;
  font-size: 0.88rem;
  color: var(--smoke);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-sm);
}

.page-about .honor-mark {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}

.page-about .honors-split {
  margin-top: 0.25rem;
}

.page-about .data-band {
  margin: 1.5rem 0;
  padding: 1.1rem 1rem;
  background: var(--deep);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-md);
}

.page-about .data-row {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr) 4.2rem;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 0;
}

.page-about .data-name {
  font-size: 0.78rem;
  color: var(--smoke);
}

.page-about .data-bar {
  height: 7px;
  background: rgba(220, 227, 234, 0.12);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .data-bar span {
  display: block;
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--orange), #ff8350);
}

.page-about .data-val {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--cream);
  text-align: right;
}

.page-about .honor-note {
  margin-top: 1.25rem;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--smoke);
}

/* ----- 联系引导 ----- */
.page-about .about-contact {
  margin-top: 2rem;
  padding: 1.75rem 1.35rem;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(201, 162, 39, 0.08) 0%, transparent 55%);
}

.page-about .about-contact p {
  margin: 0 0 1.1rem;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--smoke);
}

.page-about .contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ----- 桌面端增强 ----- */
@media (min-width: 960px) {
  .page-about .about-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 2.5rem;
    align-items: end;
    padding: 3rem;
  }

  .page-about .hero-meta {
    margin-top: 0;
  }

  .page-about .about-track-wrap {
    display: grid;
    grid-template-columns: var(--track-w) minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-track {
    position: sticky;
    top: calc(var(--topbar-h) + var(--strip-h) + 2rem);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: visible;
    margin: 0;
    padding: 0;
  }

  .page-about .about-track::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background: var(--line-faint);
  }

  .page-about .track-node {
    position: relative;
    display: block;
    border: none;
    border-radius: 0;
    padding: 0.55rem 1rem 0.55rem 2rem;
    white-space: normal;
    background: transparent;
  }

  .page-about .track-node::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.7rem;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--navy);
    border: 2px solid var(--slate);
    transition: background 0.25s var(--ease-nav), border-color 0.25s var(--ease-nav);
  }

  .page-about .track-node:hover,
  .page-about .track-node:focus {
    background: transparent;
  }

  .page-about .track-node:hover::before,
  .page-about .track-node:focus::before {
    background: var(--orange);
    border-color: var(--orange);
  }

  .page-about .track-year {
    color: var(--smoke);
    transition: color 0.25s var(--ease-nav);
  }

  .page-about .track-node:hover .track-year,
  .page-about .track-node:focus .track-year {
    color: var(--orange);
  }

  .page-about .about-section {
    padding-top: 0.9rem;
  }

  .page-about .about-media-row {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 1.5rem;
    align-items: start;
  }

  .page-about .about-media-row .visual-frame {
    margin-top: 0;
  }

  .page-about .honors-split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 1.5rem;
    align-items: start;
  }

  .page-about .honors-split .data-band {
    margin-top: 1.25rem;
  }

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

  .page-about .data-row {
    grid-template-columns: 7rem minmax(0, 1fr) 4.8rem;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero {
    padding: 3.5rem;
  }
}