.page-about {
  --about-rail: 88px;
  --about-gap: clamp(18px, 3vw, 36px);
  background: var(--turf);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding: clamp(14px, 2vw, 22px) 0 0;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-about .breadcrumb-item a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .breadcrumb-item a:hover,
.page-about .breadcrumb-item a:focus-visible {
  color: var(--lime);
}

.page-about .breadcrumb-current {
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(22px, 4vw, 44px) 0 clamp(34px, 6vw, 76px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(116deg, transparent 0 55%, rgba(200, 255, 61, 0.07) 55% 56.2%, transparent 56.2%),
    radial-gradient(120% 90% at 88% 6%, rgba(124, 255, 178, 0.13), transparent 62%);
}

.page-about .about-hero-inner {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  align-items: end;
}

.page-about .hero-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .kicker-dot {
  width: 8px;
  height: 8px;
  background: var(--lime);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(200, 255, 61, 0.16);
}

.page-about h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6.4vw, 76px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  max-width: 15ch;
}

.page-about .hero-lede {
  margin: 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 26px 0 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-stat:nth-child(2) .stat-num {
  color: var(--mint);
}

.page-about .hero-stat:nth-child(3) .stat-num {
  color: var(--amber);
}

.page-about .stat-label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .hero-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--turf-2);
}

.page-about .hero-figure::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 46px;
  height: 46px;
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  opacity: 0.85;
}

.page-about .hero-figure .media-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 章节索引条 ---------- */
.page-about .about-toc {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(14, 31, 26, 0.78);
}

.page-about .about-toc ol {
  display: flex;
  margin: 0;
  padding: 0 var(--gutter);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc li {
  flex: 0 0 auto;
}

.page-about .about-toc a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 14px 16px;
  font-size: 13px;
  white-space: nowrap;
  color: var(--muted);
  text-decoration: none;
  border-right: 1px solid var(--line);
  transition: color 0.18s ease, background 0.18s ease;
}

.page-about .about-toc li:first-child a {
  border-left: 1px solid var(--line);
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus-visible {
  color: var(--ink);
  background: rgba(200, 255, 61, 0.08);
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-about .about-toc .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--lime);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding: clamp(38px, 6.5vw, 84px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-chapter:first-of-type {
  border-top: 0;
}

.page-about .chapter-grid {
  display: grid;
  gap: 18px;
}

.page-about .chapter-rail {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .rail-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5.5vw, 40px);
  font-weight: 600;
  line-height: 1;
  color: var(--muted);
  opacity: 0.65;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.page-about .rail-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-chapter.is-current .rail-num {
  color: var(--lime);
  opacity: 1;
}

.page-about .about-chapter.is-current .rail-note {
  color: var(--ink);
}

.page-about .chapter-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4vw, 42px);
  line-height: 1.16;
  max-width: 22ch;
}

.page-about .chapter-lede {
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .chapter-cols {
  display: grid;
  gap: 24px;
}

.page-about .chapter-main p {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .chapter-main p:last-child {
  margin-bottom: 0;
}

.page-about .chapter-side {
  border-left: 2px solid var(--lime);
  padding-left: 16px;
}

.page-about .side-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .side-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .side-list li {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .side-list .num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* ---------- 团队矩阵 ---------- */
.page-about .team-matrix {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-about .team-cell {
  padding: 20px 18px 22px;
  background: var(--turf-2);
  border: 1px solid var(--line);
  border-top: 3px solid var(--line);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-about .team-cell:hover {
  background: var(--glass);
  border-top-color: var(--lime);
  transform: translateY(-2px);
}

.page-about .team-count {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .team-cell:nth-child(2) .team-count {
  color: var(--mint);
}

.page-about .team-cell:nth-child(3) .team-count {
  color: var(--amber);
}

.page-about .team-cell:nth-child(4) .team-count {
  color: var(--violet);
}

.page-about .team-cell h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-cell p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 生产流程 ---------- */
.page-about .flow-wrap {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

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

.page-about .flow-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .flow-step:first-child {
  border-top: 2px solid var(--lime);
}

.page-about .flow-idx {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--lime);
}

.page-about .flow-step h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .flow-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .flow-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--turf-2);
}

.page-about .flow-figure .media-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .flow-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- 内容标准 ---------- */
.page-about .standard-grid {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.page-about .standard-item {
  padding: 16px;
  background: rgba(20, 43, 36, 0.55);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
}

.page-about .standard-item:nth-child(1) {
  border-left-color: var(--lime);
}

.page-about .standard-item:nth-child(2) {
  border-left-color: var(--ember);
}

.page-about .standard-item:nth-child(3) {
  border-left-color: var(--amber);
}

.page-about .standard-item:nth-child(4) {
  border-left-color: var(--mint);
}

.page-about .standard-item:nth-child(5) {
  border-left-color: var(--violet);
}

.page-about .standard-key {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.page-about .standard-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .standard-note {
  margin-top: 22px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--turf-2);
}

.page-about .standard-note p {
  margin: 0 0 16px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--ink);
}

/* ---------- 发展里程 ---------- */
.page-about .milestone-wrap {
  margin-top: 22px;
}

.page-about .timeline-scroll {
  overflow-x: auto;
  padding: 8px 0 18px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.page-about .timeline-scroll:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
}

.page-about .timeline-track {
  position: relative;
  display: flex;
  gap: 14px;
  min-width: max-content;
  padding-top: 34px;
}

.page-about .timeline-track::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 12px;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--line) 0 18px, transparent 18px 36px);
}

.page-about .timeline-node {
  position: relative;
  flex: 0 0 auto;
  width: 220px;
  padding: 16px;
  background: var(--turf-2);
  border: 1px solid var(--line);
  scroll-snap-align: start;
}

.page-about .timeline-node::before {
  content: "";
  position: absolute;
  left: 16px;
  top: -28px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, 0.14);
}

.page-about .timeline-node:nth-child(3)::before {
  background: var(--ember);
  box-shadow: 0 0 0 4px rgba(255, 106, 61, 0.16);
}

.page-about .timeline-year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  line-height: 1;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}

.page-about .timeline-node h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .timeline-node p {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--muted);
}

.page-about .milestone-figure {
  margin: 20px 0 0;
  max-width: 320px;
  border: 1px solid var(--line);
  background: var(--turf-2);
}

.page-about .milestone-figure .media-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

/* ---------- 合作生态 ---------- */
.page-about .partner-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .partner-tag {
  max-width: 100%;
  border: 1px solid var(--line);
  background: var(--turf-2);
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-about .partner-tag summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 16px;
  font-size: 14px;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.page-about .partner-tag summary::-webkit-details-marker {
  display: none;
}

.page-about .partner-tag summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}

.page-about .partner-tag[open] summary::after {
  content: "−";
  color: var(--lime);
}

.page-about .partner-tag summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-about .partner-tag .pnum {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .partner-tag:nth-child(3n) .pnum {
  color: var(--mint);
}

.page-about .partner-tag p {
  margin: 0;
  padding: 0 16px 14px;
  max-width: 44ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}

.page-about .partner-tag[open] {
  border-color: var(--lime);
  background: var(--glass);
}

.page-about .eco-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin-top: 26px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: rgba(20, 43, 36, 0.7);
}

.page-about .eco-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}

.page-about .eco-label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 服务与联系 ---------- */
.page-about .contact-grid {
  display: grid;
  gap: 22px;
  margin-top: 20px;
}

.page-about .contact-body p {
  margin: 0 0 16px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .contact-points {
  display: grid;
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-about .contact-points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .contact-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--lime);
}

.page-about .contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .contact-card {
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--glass);
  align-self: start;
}

.page-about .contact-row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.page-about .contact-row:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .contact-val {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .team-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .hero-lede {
    font-size: 17px;
  }

  .page-about .chapter-grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .chapter-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding-top: 6px;
  }

  .page-about .rail-note {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
  }

  .page-about .chapter-cols {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .chapter-main p {
    font-size: 17px;
  }

  .page-about .flow-wrap {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 34px;
  }

  .page-about .contact-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 34px;
  }

  .page-about .milestone-figure {
    max-width: 360px;
  }
}

@media (min-width: 1080px) {
  .page-about .team-matrix {
    grid-template-columns: 1.7fr 1.35fr 1fr 1fr;
  }

  .page-about .standard-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .standard-item {
    grid-column: span 2;
  }

  .page-about .standard-item:nth-child(-n + 2) {
    grid-column: span 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-cell,
  .page-about .partner-tag,
  .page-about .rail-num,
  .page-about .about-toc a {
    transition: none;
  }

  .page-about .team-cell:hover {
    transform: none;
  }
}
<<<END>>>