.page-about {
  --about-radius: 2px;
  --about-shadow: 0 18px 34px -24px rgba(14, 42, 36, 0.85);
  background: var(--paper);
}

.page-about [id] {
  scroll-margin-top: 92px;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(18px, 3vw, 30px) 0 clamp(44px, 7vw, 84px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), 0 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -34%;
  width: min(520px, 62vw);
  height: min(520px, 62vw);
  background: var(--sand);
  opacity: 0.07;
  transform: rotate(20deg);
  border-radius: 42% 0 42% 0;
  pointer-events: none;
}

.page-about .about-hero .breadcrumbs,
.page-about .about-hero .breadcrumbs a,
.page-about .about-hero .breadcrumbs li {
  color: rgba(248, 242, 230, 0.68);
  font-size: 13px;
}

.page-about .about-hero .breadcrumbs a:hover,
.page-about .about-hero .breadcrumbs a:focus-visible {
  color: var(--sand);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  margin-top: clamp(18px, 3vw, 30px);
  position: relative;
  z-index: 1;
}

.page-about .about-hero .eyebrow {
  color: var(--orange);
  letter-spacing: 0.18em;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 14px 0 0;
  color: var(--paper);
}

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(248, 242, 230, 0.84);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero-figure {
  margin: 0;
}

.page-about .about-hero-figure .media-frame {
  box-shadow: 14px 14px 0 rgba(232, 93, 42, 0.5);
  transform: rotate(-1.5deg);
}

.page-about .about-hero-figure figcaption {
  font-size: 12px;
  line-height: 1.6;
}

/* ===== 页内目录 ===== */
.page-about .about-index {
  background: var(--sand);
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-index ol {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 12px max(var(--pad), calc((100% - var(--w)) / 2));
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-index a {
  display: inline-block;
  white-space: nowrap;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* ===== 通用区块 ===== */
.page-about .about-story,
.page-about .about-team,
.page-about .about-notes,
.page-about .about-next {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-about .about-story,
.page-about .about-notes,
.page-about .about-next {
  background: var(--paper);
}

.page-about .about-team {
  background: var(--sand);
}

.page-about .about-timeline {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(46px, 7vw, 90px) 0;
}

.page-about .about-network {
  background: var(--ink-2);
  color: var(--paper);
  padding: clamp(46px, 7vw, 90px) 0;
}

.page-about .section-head {
  max-width: 60ch;
}

.page-about .about-story .eyebrow,
.page-about .about-team .eyebrow,
.page-about .about-notes .eyebrow,
.page-about .about-next .eyebrow {
  color: var(--ink-2);
}

.page-about .about-timeline .eyebrow {
  color: var(--grass);
}

.page-about .about-network .eyebrow {
  color: var(--orange);
}

.page-about .section-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-about .about-timeline .section-title,
.page-about .about-network .section-title {
  color: var(--paper);
}

/* ===== 品牌故事 ===== */
.page-about .story-grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .story-copy p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--char);
}

.page-about .story-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.page-about .story-stats li {
  background: var(--paper);
  padding: 16px 14px 18px;
}

.page-about .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .stat-label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(28, 33, 31, 0.72);
}

.page-about .about-note {
  position: relative;
  background: var(--sand);
  border-left: 4px solid var(--orange);
  padding: 26px 22px 24px;
  transform: rotate(-1.6deg);
  box-shadow: var(--about-shadow);
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-about .about-note::before {
  content: "";
  position: absolute;
  top: -9px;
  left: 50%;
  width: 74px;
  height: 20px;
  transform: translateX(-50%) rotate(-4deg);
  background: rgba(232, 93, 42, 0.32);
}

.page-about .about-note:hover,
.page-about .about-note:focus-within {
  transform: rotate(0deg) translateY(-3px);
  box-shadow: 0 24px 40px -26px rgba(14, 42, 36, 0.9);
}

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

.page-about .note-mark {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
  margin-bottom: 10px !important;
}

/* ===== 时间线 ===== */
.page-about .timeline {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  max-width: 780px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--grass) 58%, var(--slate) 100%);
  opacity: 0.85;
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 clamp(24px, 3.4vw, 34px) 44px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--sand);
  box-sizing: border-box;
}

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

.page-about .timeline-item--now::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(232, 93, 42, 0.28);
}

.page-about .timeline-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 5px 12px;
  background: var(--sand);
  color: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 86% 100%, 0 100%);
}

.page-about .timeline-item--now .timeline-year {
  background: var(--orange);
  color: var(--ink);
}

.page-about .timeline-item h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.1vw, 22px);
  font-weight: 700;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .timeline-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(248, 242, 230, 0.78);
  max-width: 60ch;
}

/* ===== 团队分工 ===== */
.page-about .team-tabs {
  margin-top: clamp(24px, 3.5vw, 38px);
}

.page-about .about-team .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-team .tab {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  padding: 11px 18px;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-team .tab:hover {
  background: var(--sand-deep);
}

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

.page-about .about-team .tab:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

.page-about .about-team .tabpanel {
  margin-top: 20px;
}

.page-about .team-panel {
  display: grid;
  gap: clamp(12px, 2vw, 22px);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  padding: clamp(20px, 3vw, 34px);
  box-shadow: var(--about-shadow);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .team-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(48px, 8vw, 76px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .team-body h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about .team-body p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--char);
}

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

.page-about .team-points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}

.page-about .team-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--grass);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-flow {
  margin-top: clamp(26px, 4vw, 40px);
  padding: clamp(20px, 3vw, 30px);
  background: var(--ink);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .flow-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  color: var(--sand);
}

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

.page-about .flow-steps li {
  position: relative;
  padding-left: 34px;
  counter-increment: flow;
}

.page-about .flow-steps li::before {
  content: counter(flow);
  position: absolute;
  left: 0;
  top: 0;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  background: var(--grass);
  border-radius: 50%;
}

.page-about .flow-step {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .flow-desc {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(248, 242, 230, 0.7);
  margin-top: 2px;
}

/* ===== 批注方法 ===== */
.page-about .notes-grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .notes-figure {
  margin: 0;
}

.page-about .notes-figure figcaption {
  font-size: 12px;
  line-height: 1.6;
}

.page-about .notes-board {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .notes-board .section-title {
  margin-bottom: 6px;
}

.page-about .board-card {
  padding: 18px 20px;
}

.page-about .board-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .board-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--char);
}

.page-about .panel--ink.board-card {
  color: var(--paper);
}

.page-about .panel--ink.board-card h3 {
  color: var(--sand);
}

.page-about .panel--ink.board-card dt {
  color: var(--grass);
}

.page-about .panel--ink.board-card dd {
  color: rgba(248, 242, 230, 0.8);
}

.page-about .term-list {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .term-list dt {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .term-list dd {
  margin: 3px 0 0;
  font-size: 14px;
  line-height: 1.75;
}

.page-about .board-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 12px !important;
}

.page-about .board-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 2px;
}

.page-about .board-links a:hover,
.page-about .board-links a:focus-visible {
  color: var(--orange);
}

/* ===== 协作网络 ===== */
.page-about .network-grid {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  margin-top: clamp(22px, 3vw, 34px);
  align-items: start;
}

.page-about .network-copy p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(248, 242, 230, 0.82);
  max-width: 58ch;
}

.page-about .cadence {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(248, 242, 230, 0.16);
  border: 1px solid rgba(248, 242, 230, 0.16);
}

.page-about .cadence li {
  background: var(--ink-2);
  padding: 12px 14px;
  display: grid;
  gap: 2px;
}

.page-about .cadence-when {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--grass);
  letter-spacing: 0.02em;
}

.page-about .cadence-what {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(248, 242, 230, 0.82);
}

.page-about .network-map {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 24px 0 0;
}

.page-about .network-figure {
  margin: 0;
}

.page-about .network-figure .media-frame {
  box-shadow: -14px 14px 0 rgba(115, 184, 74, 0.35);
}

.page-about .network-figure figcaption {
  font-size: 12px;
  line-height: 1.6;
}

/* ===== 继续了解 ===== */
.page-about .next-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .next-card {
  display: block;
  padding: 22px 20px 24px;
  background: var(--sand);
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  background: var(--sand-deep);
  transform: translateY(-4px);
  box-shadow: 0 20px 34px -24px rgba(14, 42, 36, 0.9);
}

.page-about .next-card:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

.page-about .next-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about .next-card p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(28, 33, 31, 0.76);
}

.page-about .next-go {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--orange);
}

/* ===== 响应式 ===== */
@media (min-width: 620px) {
  .page-about .story-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
  }

  .page-about .story-grid {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
    align-items: start;
  }

  .page-about .notes-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .network-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .team-panel {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: start;
  }

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

@media (min-width: 1080px) {
  .page-about .timeline {
    max-width: 820px;
  }

  .page-about .about-hero-figure .media-frame {
    transform: rotate(-2deg);
  }
}

@media (max-width: 899px) {
  .page-about .about-hero-figure .media-frame {
    transform: none;
    box-shadow: 10px 10px 0 rgba(232, 93, 42, 0.45);
  }

  .page-about .news-figure,
  .page-about .network-figure .media-frame {
    box-shadow: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-note,
  .page-about .next-card,
  .page-about .about-index a,
  .page-about .about-team .tab {
    transition: none;
  }

  .page-about .next-card:hover,
  .page-about .about-note:hover {
    transform: none;
  }
}
<<<END>>>

严格输出规定的标记结构，不要添加解释性文字，只需输出 HTML 和 CSS。