.page-about {
  --about-rail-w: 200px;
  background: var(--bg);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--c-night);
  color: var(--c-bone);
  border-bottom: 3px solid var(--c-rock);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -20%;
  bottom: -20%;
  left: -30%;
  right: -30%;
  background: repeating-linear-gradient(
    90deg,
    rgba(215, 25, 32, 0.22) 0 12px,
    rgba(215, 25, 32, 0) 12px 42px
  );
  transform: skewX(-12deg);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
  padding-block: 26px 34px;
}

.page-about .about-hero .breadcrumb-list,
.page-about .about-hero .breadcrumb-list a {
  color: var(--c-mist);
}

.page-about .about-hero .breadcrumb-list a {
  text-decoration: none;
  border-bottom: 1px solid rgba(244, 241, 234, 0.35);
}

.page-about .about-hero .breadcrumb-list a:hover,
.page-about .about-hero .breadcrumb-list a:focus-visible {
  color: var(--c-lime);
  border-bottom-color: var(--c-lime);
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 18px 0 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-lime);
}

.page-about .about-kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-lime);
}

.page-about .about-h1 {
  margin: 0 0 16px;
  font-family: var(--font-narrow);
  font-weight: 900;
  font-size: clamp(1.85rem, 6.6vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: #fff;
  transform: skewX(-2deg);
  transform-origin: left bottom;
  text-wrap: balance;
}

.page-about .about-lead {
  max-width: 54ch;
  margin: 0 0 22px;
  font-size: 1rem;
  line-height: 1.65;
  color: #cdd5dd;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
}

.page-about .about-hero-actions .link-arrow {
  color: var(--c-lime);
  font-size: 0.9rem;
  font-weight: 700;
}

.page-about .hero-media {
  margin: 0;
  border: 3px solid var(--c-red);
  background: var(--c-steel);
  line-height: 0;
}

.page-about .hero-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 团队数字带 ---------- */
.page-about .about-stats {
  background: var(--c-red);
  color: #fff;
  border-bottom: 3px solid var(--c-rock);
}

.page-about .about-stats-grid {
  display: grid;
  gap: 0;
}

.page-about .stat-total {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  padding: 24px 0 20px;
  border-bottom: 2px solid rgba(0, 0, 0, 0.25);
}

.page-about .stat-num {
  font-family: var(--font-narrow);
  font-weight: 900;
  font-size: clamp(3rem, 12vw, 5.5rem);
  line-height: 0.82;
  letter-spacing: -0.03em;
  color: #fff;
}

.page-about .stat-cap {
  max-width: 17ch;
  font-size: 0.85rem;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.9);
}

.page-about .stat-rows {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .stat-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 13px 0;
  border-bottom: 2px solid rgba(0, 0, 0, 0.18);
}

.page-about .stat-row:last-child {
  border-bottom: 0;
  padding-bottom: 20px;
}

.page-about .stat-key {
  min-width: 2.6ch;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  color: var(--c-lime);
}

.page-about .stat-name {
  font-size: 0.95rem;
  font-weight: 800;
  color: #fff;
}

.page-about .stat-desc {
  font-size: 0.85rem;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.88);
}

/* ---------- 正文骨架 ---------- */
.page-about .about-body {
  padding-block: 30px 10px;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(215, 25, 32, 0.045) 0 6px,
    rgba(215, 25, 32, 0) 6px 26px
  );
}

.page-about .about-content {
  min-width: 0;
}

.page-about .about-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 0 16px;
  margin-bottom: 24px;
  border-bottom: var(--rule);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-about .about-rail::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail .rail-link {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 11px;
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
  text-decoration: none;
  color: var(--c-rock);
  background: var(--c-paper);
  border: 2px solid var(--c-rock);
  border-radius: var(--radius);
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-rail .rail-link .mono {
  font-size: 0.68rem;
  color: var(--c-clay);
}

.page-about .about-rail .rail-link[aria-current="true"] {
  background: var(--c-red);
  border-color: var(--c-red);
  color: #fff;
}

.page-about .about-rail .rail-link[aria-current="true"] .mono {
  color: var(--c-lime);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  position: relative;
  padding-bottom: 34px;
  margin-bottom: 34px;
  border-bottom: 2px solid var(--c-paper);
}

.page-about .about-section:last-child {
  border-bottom: 0;
  margin-bottom: 0;
}

.page-about .section-flag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--c-clay);
}

.page-about .section-flag::after {
  content: "";
  width: 42px;
  height: 2px;
  background: var(--c-clay);
}

.page-about .about-section h2 {
  margin: 0 0 16px;
  font-family: var(--font-narrow);
  font-weight: 900;
  font-size: clamp(1.4rem, 4.6vw, 2.1rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--c-steel);
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .about-section p {
  max-width: 64ch;
  margin: 0 0 14px;
  font-size: 1rem;
  line-height: 1.62;
  color: var(--c-rock);
}

.page-about .takeaway {
  margin: 20px 0 0;
  padding: 13px 16px;
  max-width: 60ch;
  background: var(--c-steel);
  color: var(--c-bone);
  border-left: 6px solid var(--c-lime);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.5;
}

/* ---------- 团队小节 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 22px;
}

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

.page-about .team-media {
  margin: 0;
  border: 2px solid var(--c-rock);
  box-shadow: var(--shadow-hard);
  background: var(--c-paper);
  line-height: 0;
}

.page-about .team-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 访问结构 ---------- */
.page-about .reach-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 4px 0 22px;
}

.page-about .reach-cell {
  padding: 18px 16px;
  background: var(--c-paper);
  border: 2px solid var(--c-rock);
  box-shadow: var(--shadow-hard);
}

.page-about .reach-cell--hot {
  background: var(--c-steel);
  border-color: var(--c-steel);
  color: var(--c-bone);
}

.page-about .reach-figure {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 10px;
}

.page-about .reach-num {
  font-family: var(--font-narrow);
  font-weight: 900;
  font-size: clamp(2.1rem, 8vw, 3rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--c-red);
}

.page-about .reach-cell--hot .reach-num {
  color: var(--c-lime);
}

.page-about .reach-unit {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-clay);
}

.page-about .reach-cell--hot .reach-unit {
  color: rgba(244, 241, 234, 0.8);
}

.page-about .reach-label {
  max-width: none;
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--c-rock);
}

.page-about .reach-cell--hot .reach-label {
  color: rgba(244, 241, 234, 0.88);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline-media {
  margin: 0 0 24px;
  border: 2px solid var(--c-rock);
  background: var(--c-steel);
  line-height: 0;
}

.page-about .timeline-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .milestones {
  position: relative;
  list-style: none;
  margin: 0 0 18px;
  padding: 0 0 0 30px;
}

.page-about .milestones::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--c-rock);
  opacity: 0.4;
}

.page-about .milestone {
  position: relative;
  padding-bottom: 22px;
}

.page-about .milestone:last-child {
  padding-bottom: 0;
}

.page-about .milestone::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  background: var(--c-moss);
  border: 2px solid var(--c-rock);
  border-radius: 50%;
}

.page-about .milestone-year {
  display: block;
  margin-bottom: 4px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-clay);
}

.page-about .milestone h3 {
  margin: 0 0 5px;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 800;
  color: var(--c-steel);
}

.page-about .milestone p {
  max-width: 58ch;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--c-rock);
}

/* ---------- 页尾行动 ---------- */
.page-about .about-outro-wrap {
  padding-bottom: 40px;
}

.page-about .about-outro {
  border-top: 3px solid var(--c-rock);
  padding-top: 26px;
}

.page-about .about-outro h2 {
  margin: 0 0 12px;
  font-family: var(--font-narrow);
  font-weight: 900;
  font-size: clamp(1.35rem, 4.4vw, 1.9rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--c-steel);
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .about-outro p {
  max-width: 64ch;
  margin: 0 0 18px;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--c-rock);
}

.page-about .outro-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
}

.page-about .outro-links .link-arrow {
  color: var(--c-steel);
  font-size: 0.9rem;
  font-weight: 700;
}

/* ---------- 平板以上 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero-grid {
    padding-block: 34px 44px;
    gap: 30px;
  }

  .page-about .about-lead {
    font-size: 1.0625rem;
  }

  .page-about .about-body {
    padding-block: 40px 12px;
  }

  .page-about .reach-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .reach-cell--hot {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 46px;
    padding-block: 50px 58px;
  }

  .page-about .about-stats-grid {
    grid-template-columns: 280px minmax(0, 1fr);
    align-items: stretch;
  }

  .page-about .stat-total {
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    padding: 28px 30px 28px 0;
    border-bottom: 0;
    border-right: 2px solid rgba(0, 0, 0, 0.25);
  }

  .page-about .stat-rows {
    padding-left: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .page-about .stat-row:last-child {
    padding-bottom: 13px;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 30px;
  }

  .page-about .reach-grid {
    grid-template-columns: 1.35fr 1fr 1fr;
  }

  .page-about .reach-cell--hot {
    grid-column: auto;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: 52px;
    align-items: start;
    padding-block: 52px 20px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 128px;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    margin-bottom: 0;
    padding: 0;
    border-bottom: 0;
  }

  .page-about .about-rail .rail-link {
    border: 0;
    border-left: 2px solid var(--c-paper);
    border-radius: 0;
    background: transparent;
    padding: 10px 0 10px 14px;
    font-size: 0.84rem;
    font-weight: 500;
    color: var(--c-cement);
  }

  .page-about .about-rail .rail-link:hover {
    color: var(--c-rock);
    background: transparent;
  }

  .page-about .about-rail .rail-link[aria-current="true"] {
    background: transparent;
    border-left-color: var(--c-red);
    color: var(--c-red);
    font-weight: 800;
  }

  .page-about .about-section {
    padding-bottom: 44px;
    margin-bottom: 44px;
  }

  .page-about .milestones {
    padding-left: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail .rail-link {
    transition: none;
  }
}
<<<END>>>