.page-about {
  --about-gap: clamp(14px, 2vw, 22px);
  --about-radius: 2px;
  background:
    radial-gradient(900px 520px at 84% -8%, rgba(217, 255, 67, 0.09), transparent 68%),
    linear-gradient(180deg, var(--ink) 0%, var(--turf) 48%, var(--ink) 100%);
  color: var(--mist);
  overflow-x: hidden;
}

.page-about .page-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-about .about-body {
  min-width: 0;
  padding-bottom: var(--gap-l);
}

.page-about .container {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 左侧锚点轨 */
.page-about .anchor-rail {
  display: none;
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--line-faint);
  background: rgba(5, 19, 14, 0.6);
}

.page-about .rail-inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 24px 0;
}

.page-about .rail-title {
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--font-anno);
  font-size: 11px;
  letter-spacing: 0.34em;
  color: var(--sage);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .rail-link {
  position: relative;
  display: block;
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--sage);
  text-decoration: none;
  padding: 4px 0;
  transition: color 0.18s var(--ease);
}

.page-about .rail-link::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 2px;
  bottom: 2px;
  width: 1px;
  background: transparent;
  transition: background 0.18s var(--ease);
}

.page-about .rail-link:hover,
.page-about .rail-link.is-active {
  color: var(--lime);
}

.page-about .rail-link.is-active::before {
  background: var(--lime);
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-top: clamp(14px, 2vw, 24px);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sage);
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

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

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

.page-about .breadcrumb-sep {
  color: var(--line);
}

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

/* 首屏 */
.page-about .about-hero {
  position: relative;
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
  padding: clamp(24px, 4vw, 52px) 0 clamp(30px, 4.5vw, 60px);
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 26px);
  opacity: 0.55;
}

.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-anno);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--lime);
}

.page-about .hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 8.4vw, 84px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--mist);
}

.page-about .hero-lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--sage);
}

.page-about .hero-stats {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-faint);
  border: 1px solid var(--line-faint);
}

.page-about .hero-stats .stat {
  background: var(--ink);
  padding: 14px 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .hero-stats .stat-value {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1;
  color: var(--lime);
}

.page-about .hero-stats .stat-label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sage);
}

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

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

.page-about .hero-media figcaption {
  padding: 10px 12px;
  font-family: var(--font-anno);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sage);
  border-top: 1px solid var(--line-faint);
}

/* 堆叠面板章节 */
.page-about .board {
  display: grid;
  gap: var(--about-gap);
  padding: clamp(30px, 4.6vw, 60px) 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .board--raised {
  background: var(--panel-soft);
  border: 1px solid var(--line-faint);
  border-radius: var(--about-radius);
  padding-inline: clamp(16px, 3vw, 34px);
  margin-block: clamp(24px, 3.4vw, 44px);
}

.page-about .board-head {
  position: relative;
  min-width: 0;
}

.page-about .board-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--lime);
  border-bottom: 1px solid var(--line-lit);
  padding-bottom: 6px;
}

.page-about .board-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .board-anno {
  margin: 14px 0 0;
  font-family: var(--font-anno);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sage);
}

.page-about .board-body {
  min-width: 0;
}

.page-about .board-lead {
  margin: 0 0 clamp(20px, 2.6vw, 30px);
  max-width: 36em;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: var(--mist);
}

/* 年份切换 */
.page-about .year-tabs {
  display: grid;
  gap: var(--about-gap);
  border-top: 1px solid var(--line-faint);
  padding-top: var(--about-gap);
}

.page-about .year-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .tab {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 8px 14px;
  color: var(--sage);
  background: transparent;
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .tab:hover {
  color: var(--mist);
  border-color: var(--line-lit);
}

.page-about .tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .year-panels {
  min-width: 0;
  border: 1px solid var(--line-soft);
  background: var(--panel);
  padding: clamp(16px, 2.4vw, 26px);
}

.page-about .year-panel[hidden] {
  display: none;
}

.page-about .year-panel + .year-panel {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line-faint);
}

.page-about .year-panel-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(18px, 2.4vw, 22px);
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .year-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--sage);
}

.page-about .year-mark {
  margin-top: 14px;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--amber);
  border-left: 2px solid var(--amber);
  padding-left: 10px;
}

.page-about .year-mark .data {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 15px;
}

/* 工作流 */
.page-about .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: flow;
}

.page-about .flow-node {
  position: relative;
  padding: 18px 16px 16px;
  background: rgba(11, 36, 26, 0.72);
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--line);
  border-radius: var(--about-radius);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .flow-node::after {
  counter-increment: flow;
  content: "0" counter(flow);
  position: absolute;
  top: 12px;
  right: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--line);
}

.page-about .flow-node:hover {
  transform: translateY(-2px);
  border-top-color: var(--lime);
  box-shadow: var(--shadow-hover);
}

.page-about .flow-tag {
  display: inline-block;
  font-family: var(--font-anno);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--lime);
  margin-bottom: 10px;
}

.page-about .flow-node h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--mist);
  padding-right: 26px;
}

.page-about .flow-node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .flow-media {
  margin: clamp(20px, 2.8vw, 30px) 0 0;
  border: 1px solid var(--line-soft);
  background: var(--ink);
  overflow: hidden;
}

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

.page-about .flow-media figcaption {
  padding: 10px 12px;
  font-family: var(--font-anno);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sage);
  border-top: 1px solid var(--line-faint);
}

/* 更新节奏 */
.page-about .cadence-grid {
  display: grid;
  gap: 12px;
}

.page-about .cadence-card {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--lime);
  border-radius: var(--about-radius);
}

.page-about .cadence-card--flare {
  border-left-color: var(--flare);
}

.page-about .cadence-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(46px, 9vw, 72px);
  line-height: 0.9;
  color: var(--lime);
}

.page-about .cadence-card--flare .cadence-num {
  color: var(--flare);
}

.page-about .cadence-unit {
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--sage);
  margin-left: 8px;
}

.page-about .cadence-card h3 {
  margin: 14px 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .cadence-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--sage);
}

.page-about .band {
  margin-top: clamp(18px, 2.4vw, 26px);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--line-faint);
  border-left: 3px solid var(--amber);
  background: rgba(255, 200, 87, 0.05);
}

.page-about .band-label {
  font-family: var(--font-anno);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--amber);
}

.page-about .band-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .band-text .data {
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--lime);
}

/* 覆盖 */
.page-about .spread-grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .spread-figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  background: var(--ink);
  overflow: hidden;
}

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

.page-about .spread-figure figcaption {
  padding: 10px 12px;
  font-family: var(--font-anno);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sage);
  border-top: 1px solid var(--line-faint);
}

.page-about .spread-side {
  min-width: 0;
}

.page-about .heat-grid {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 4px;
  margin-bottom: 18px;
}

.page-about .heat-grid span {
  display: block;
  aspect-ratio: 1 / 1;
  background: rgba(217, 255, 67, 0.07);
  border: 1px solid rgba(44, 98, 74, 0.35);
}

.page-about .heat-grid .hot {
  background: rgba(217, 255, 67, 0.55);
  border-color: var(--lime);
}

.page-about .spread-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-faint);
  border: 1px solid var(--line-faint);
}

.page-about .spread-stats li {
  background: var(--ink);
  padding: 12px 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.page-about .spread-value {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 22px;
  line-height: 1;
  color: var(--lime);
  min-width: 76px;
}

.page-about .spread-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--sage);
}

/* 协作与栏目 */
.page-about .partner-grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .partner-panel {
  min-width: 0;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
}

.page-about .panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-faint);
  margin-bottom: 14px;
}

.page-about .panel-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(17px, 2.2vw, 20px);
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .panel-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .partner-panel > p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--sage);
}

.page-about .partner-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .partner-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--sage);
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-faint);
}

.page-about .partner-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 3px 8px;
  border: 1px solid currentColor;
  border-radius: var(--about-radius);
  white-space: nowrap;
}

.page-about .tag-lime {
  color: var(--lime);
}

.page-about .tag-amber {
  color: var(--amber);
}

.page-about .tag-flare {
  color: var(--flare);
}

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

.page-about .topic-list li {
  position: relative;
  padding-left: 14px;
}

.page-about .topic-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 5px;
  height: 5px;
  background: var(--lime);
}

.page-about .topic-list h4 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .topic-list p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--sage);
}

.page-about .partner-actions {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 联系 */
.page-about .board--contact {
  border-bottom: 0;
}

.page-about .contact-grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line-soft);
  background: var(--panel);
}

.page-about .contact-list li {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .contact-list li:last-child {
  border-bottom: 0;
}

.page-about .contact-key {
  font-family: var(--font-anno);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--sage);
}

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

.page-about .contact-val.data {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-about .contact-side {
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--lime);
  background: var(--panel-soft);
}

.page-about .contact-side p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--sage);
}

.page-about .contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 11px 18px;
  border-radius: var(--about-radius);
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .btn:hover {
  transform: translateY(-2px);
}

.page-about .btn-primary {
  background: var(--lime);
  color: var(--ink);
  border-color: var(--lime);
}

.page-about .btn-ghost {
  background: transparent;
  color: var(--mist);
  border-color: var(--line-soft);
}

.page-about .btn-ghost:hover {
  border-color: var(--lime);
  color: var(--lime);
}

/* 断点：平板及以上 */
@media (min-width: 680px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .contact-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
  }

  .page-about .board {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.55fr);
    gap: var(--gap-l);
    align-items: start;
  }

  .page-about .board-head {
    position: sticky;
    top: 24px;
  }

  .page-about .board-anno {
    writing-mode: vertical-rl;
    margin-top: 20px;
    letter-spacing: 0.24em;
  }

  .page-about .year-tabs {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: clamp(16px, 2vw, 26px);
  }

  .page-about .year-tablist {
    flex-direction: column;
    align-items: stretch;
  }

  .page-about .year-tab {
    text-align: left;
  }

  .page-about .year-panels {
    border-left: 1px solid var(--line-soft);
  }

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

  .page-about .spread-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.85fr);
    gap: var(--gap-m);
    align-items: start;
  }

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

@media (min-width: 1040px) {
  .page-about .page-shell {
    grid-template-columns: var(--rail) minmax(0, 1fr);
  }

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

@media (min-width: 1280px) {
  .page-about .board {
    grid-template-columns: minmax(0, 0.66fr) minmax(0, 1.6fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow-node,
  .page-about .btn,
  .page-about .tab,
  .page-about .rail-link {
    transition: none;
  }

  .page-about .flow-node:hover,
  .page-about .btn:hover {
    transform: none;
  }
}
<<<END>>>

等等，上面多写了 `<<<END>>>`，需要去掉。按协议只输出两个标记。重新输出正确版本。