.page-about {
  --about-gap: 26px;
  --about-pad: 18px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
  padding-bottom: 48px;
}

.page-about .container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 28px 0 34px;
  border-bottom: 1px solid var(--panel-border);
  background:
    radial-gradient(115% 85% at 86% 0%, rgba(198, 255, 61, 0.13), transparent 62%),
    linear-gradient(168deg, var(--pitch) 0%, var(--ink) 74%);
}

.page-about .hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  filter: saturate(0.62) contrast(1.05);
  -webkit-mask-image: linear-gradient(100deg, transparent 6%, #000 72%);
  mask-image: linear-gradient(100deg, transparent 6%, #000 72%);
  pointer-events: none;
}

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

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

.page-about .breadcrumb span[aria-current="page"] {
  color: var(--paper);
}

.page-about .section-kicker {
  display: inline-block;
  margin: 0;
  padding: 3px 10px;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--ink);
  background: var(--lime);
}

.page-about .about-hero h1 {
  max-width: 18em;
  margin: 16px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.2vw, 3.4rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .hero-lead {
  max-width: 34em;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(234, 247, 217, 0.86);
}

.page-about .hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px dashed rgba(157, 181, 170, 0.34);
}

.page-about .hero-stats li {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.page-about .hero-stats .s-num {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .hero-stats .s-label {
  font-size: 12px;
  color: var(--muted);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .cta-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  background: var(--lime);
  border: 1px solid var(--lime);
  text-decoration: none;
  transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.page-about .cta-link:hover {
  transform: translateY(-2px);
  background: #d9ff74;
}

.page-about .cta-link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-about .cta-link.ghost {
  color: var(--lime);
  background: transparent;
  border-color: rgba(198, 255, 61, 0.4);
}

.page-about .cta-link.ghost:hover {
  background: rgba(198, 255, 61, 0.1);
}

.page-about .chapter-preview {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(30, 107, 79, 0.5);
  border: 1px solid var(--panel-border);
}

.page-about .chapter-preview a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 11px 12px;
  font-size: 13.5px;
  color: rgba(234, 247, 217, 0.86);
  background: rgba(11, 61, 46, 0.9);
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.page-about .chapter-preview a:hover,
.page-about .chapter-preview a:focus-visible {
  color: var(--lime);
  background: var(--moss);
  box-shadow: inset 3px 0 0 var(--lime);
}

.page-about .cp-num {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  color: var(--lime);
  opacity: 0.8;
}

/* ---------- 通用面板 ---------- */
.page-about .about-panel {
  position: relative;
  width: calc(100% - 32px);
  max-width: var(--container);
  margin: var(--about-gap) auto 0;
  padding: 26px var(--about-pad) 30px;
  background: linear-gradient(180deg, rgba(18, 80, 60, 0.42) 0%, rgba(7, 28, 22, 0.66) 100%);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow-panel);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-panel:hover {
  border-color: var(--panel-border-strong);
}

.page-about .rail-note {
  display: none;
  position: absolute;
  left: -30px;
  top: 30px;
  writing-mode: vertical-rl;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--muted);
  opacity: 0.6;
  pointer-events: none;
}

.page-about .panel-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: start;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--panel-border);
}

.page-about .panel-number {
  grid-row: span 2;
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--lime);
}

.page-about .panel-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 4.4vw, 1.85rem);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-about .panel-note {
  grid-column: 2;
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  position: relative;
  display: grid;
  gap: 18px;
  margin: 0;
  padding-left: 28px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--line) 26%, var(--line) 78%, transparent 100%);
  opacity: 0.55;
}

.page-about .tl-node {
  position: relative;
  padding: 16px 16px 18px;
  background: rgba(11, 61, 46, 0.5);
  border: 1px solid var(--panel-border);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .tl-node:hover,
.page-about .tl-node:focus-within {
  transform: translateY(-2px);
  border-color: var(--panel-border-strong);
  background: rgba(18, 80, 60, 0.62);
}

.page-about .tl-node:hover::before,
.page-about .tl-node:focus-within::before {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, 0.16);
}

.page-about .tl-watermark {
  position: absolute;
  top: -14px;
  right: 6px;
  font-family: var(--font-display);
  font-size: 74px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--lime);
  opacity: 0.08;
  pointer-events: none;
}

.page-about .tl-year {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .tl-node h3 {
  position: relative;
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .tl-node p {
  position: relative;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(234, 247, 217, 0.82);
}

.page-about .tl-more {
  position: relative;
  margin-top: 12px;
}

.page-about .tl-more summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 2px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lime);
  border-bottom: 1px solid rgba(198, 255, 61, 0.35);
  cursor: pointer;
  list-style: none;
}

.page-about .tl-more summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-more summary::before {
  content: "+";
  font-family: var(--font-display);
  font-weight: 800;
}

.page-about .tl-more[open] summary::before {
  content: "–";
}

.page-about .tl-more summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-about .tl-more ul {
  margin: 10px 0 0;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 22px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--panel-border);
  filter: saturate(0.78) contrast(1.04);
}

.page-about .timeline-figure img {
  aspect-ratio: 2 / 1;
}

.page-about .media-caption {
  margin: 8px 0 0;
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--muted);
}

/* ---------- 观察方法 ---------- */
.page-about .method-lead {
  margin: 20px 0 18px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(234, 247, 217, 0.86);
}

.page-about .method-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-about .mf-item {
  padding: 14px 14px 12px;
  background: rgba(18, 80, 60, 0.45);
  border: 1px solid var(--panel-border);
}

.page-about .mf-num {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .mf-num small {
  margin-left: 2px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
}

.page-about .mf-label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--muted);
}

.page-about .method-steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: mstep;
}

.page-about .method-steps li {
  position: relative;
  padding-left: 38px;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(234, 247, 217, 0.84);
  counter-increment: mstep;
}

.page-about .method-steps li::before {
  content: counter(mstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 24px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  color: var(--lime);
  border: 1px solid rgba(198, 255, 61, 0.3);
  background: rgba(7, 28, 22, 0.6);
}

/* ---------- 团队矩阵 ---------- */
.page-about .shift-matrix {
  overflow-x: auto;
  border: 1px solid var(--panel-border);
  font-size: 13px;
}

.page-about .shift-row {
  display: grid;
  grid-template-columns: minmax(104px, 1.3fr) repeat(3, minmax(74px, 1fr));
  min-width: 330px;
  border-top: 1px solid rgba(30, 107, 79, 0.45);
}

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

.page-about .shift-row > span {
  padding: 11px 8px;
  text-align: center;
  font-size: 12.5px;
  line-height: 1.5;
  border-left: 1px solid rgba(30, 107, 79, 0.45);
}

.page-about .shift-row > span:first-child {
  text-align: left;
  color: var(--paper);
  border-left: 0;
  font-size: 13px;
}

.page-about .shift-head {
  background: var(--moss);
}

.page-about .shift-head > span {
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .lv1 {
  background: rgba(43, 76, 66, 0.5);
  color: var(--muted);
}

.page-about .lv2 {
  background: rgba(30, 107, 79, 0.42);
  color: var(--paper);
}

.page-about .lv3 {
  background: rgba(198, 255, 61, 0.15);
  color: var(--lime);
  font-weight: 600;
}

.page-about .role-list {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .role-list details {
  padding: 10px 14px;
  background: rgba(7, 28, 22, 0.55);
  border: 1px solid var(--panel-border);
  transition: border-color 0.18s ease;
}

.page-about .role-list details:hover {
  border-color: var(--panel-border-strong);
}

.page-about .role-list summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14.5px;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

.page-about .role-list summary::-webkit-details-marker {
  display: none;
}

.page-about .role-list summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-about .role-count {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--lime);
}

.page-about .role-list p {
  margin: 9px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 合作生态 ---------- */
.page-about .eco-lead {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(234, 247, 217, 0.86);
}

.page-about .eco-grid {
  display: grid;
  gap: 22px;
}

.page-about .eco-group-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .eco-hexes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .eco-hex {
  display: grid;
  place-items: center;
  width: 52px;
  height: 58px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--lime);
  background: rgba(198, 255, 61, 0.16);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  transition: background-color 0.18s ease, transform 0.18s ease;
}

.page-about .eco-group:nth-child(2) .eco-hex {
  color: var(--paper);
  background: rgba(30, 107, 79, 0.6);
}

.page-about .eco-hex:hover {
  transform: translateY(-2px);
  background: rgba(198, 255, 61, 0.32);
}

.page-about .eco-group:nth-child(2) .eco-hex:hover {
  background: rgba(30, 107, 79, 0.9);
}

.page-about .workshop-line {
  margin: 24px 0 0;
  padding: 14px 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(234, 247, 217, 0.9);
  background: rgba(18, 80, 60, 0.42);
  border-left: 3px solid var(--lime);
}

.page-about .workshop-line strong {
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--lime);
}

/* ---------- 覆盖 ---------- */
.page-about .reach-layout {
  display: grid;
  gap: 22px;
}

.page-about .reach-copy p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(234, 247, 217, 0.85);
}

.page-about .reach-copy p:last-child {
  margin-bottom: 0;
}

.page-about .reach-figure {
  padding: 18px;
  background: rgba(11, 61, 46, 0.55);
  border: 1px solid var(--panel-border);
}

.page-about .reach-big {
  margin: 0;
  font-family: var(--font-display);
  font-size: 54px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--lime);
}

.page-about .reach-big-label {
  margin: 4px 0 16px;
  font-size: 12.5px;
  color: var(--muted);
}

.page-about .province-dots {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .province-dots li {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: rgba(198, 255, 61, 0.18);
  border: 1px solid rgba(198, 255, 61, 0.34);
}

/* ---------- 下一步 ---------- */
.page-about .next-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .next-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  padding: 14px 0;
  border-top: 1px dashed rgba(30, 107, 79, 0.6);
}

.page-about .next-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .next-tag {
  padding: 2px 8px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--yellow);
}

.page-about .next-list li:nth-child(2) .next-tag {
  background: var(--lime);
}

.page-about .next-list li:nth-child(3) .next-tag {
  color: var(--paper);
  background: var(--line);
}

.page-about .next-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(234, 247, 217, 0.85);
}

.page-about .next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about {
    --about-pad: 26px;
    --about-gap: 30px;
  }

  .page-about .about-hero {
    padding: 36px 0 42px;
  }

  .page-about .chapter-preview {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-panel {
    padding: 30px var(--about-pad) 34px;
  }

  .page-about .panel-number {
    font-size: 42px;
  }

  .page-about .method-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .eco-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 64px;
    row-gap: 30px;
    padding-left: 0;
  }

  .page-about .timeline::before {
    left: 50%;
    top: 10px;
    bottom: 10px;
  }

  .page-about .tl-node:nth-child(odd) {
    grid-column: 1;
    text-align: right;
  }

  .page-about .tl-node:nth-child(even) {
    grid-column: 2;
  }

  .page-about .tl-node::before {
    left: auto;
    right: -37px;
  }

  .page-about .tl-node:nth-child(even)::before {
    left: -37px;
    right: auto;
  }

  .page-about .tl-node:nth-child(odd) .tl-watermark {
    right: auto;
    left: 8px;
  }

  .page-about .tl-node:nth-child(odd) .tl-more ul {
    padding-left: 0;
    padding-right: 16px;
  }

  .page-about .reach-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
    gap: 30px;
  }

  .page-about .timeline-figure {
    max-width: 860px;
    margin-left: auto;
  }
}

@media (min-width: 1100px) {
  .page-about {
    --about-gap: 34px;
    --about-pad: 40px;
  }

  .page-about .rail-note {
    display: block;
  }

  .page-about .panel-head {
    gap: 6px 20px;
  }

  .page-about .panel-number {
    font-size: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }

  .page-about .tl-node:hover,
  .page-about .eco-hex:hover,
  .page-about .cta-link:hover {
    transform: none;
  }
}
<<<END>>>