.page-about {
  --about-measure: 34em;
  --about-space: clamp(32px, 4.5vw, 80px);
  background: var(--night);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-about .wrap {
  max-width: var(--wrap);
  padding-inline: max(var(--gut), 20px);
  margin-inline: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(24px, 5vw, 64px);
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  margin-bottom: clamp(28px, 5vw, 56px);
}

.page-about .breadcrumb a {
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

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

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

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

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mint);
  margin: 0 0 14px;
}

.page-about .about-h1 {
  font-size: clamp(32px, 7.4vw, 64px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 0 0 22px;
  max-width: 14em;
}

.page-about .about-lead {
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 32em;
  margin: 0;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 2px solid var(--line);
  background: var(--stand);
  box-shadow: var(--shadow);
}

.page-about .stat {
  padding: 18px 16px 20px;
  border-bottom: 2px solid var(--line);
  border-right: 2px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .stat:nth-child(2n) {
  border-right: 0;
}

.page-about .stat:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
}

.page-about .stat-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-3);
}

.page-about .about-fig {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--stand);
  box-shadow: var(--shadow-sm);
}

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

.page-about .about-fig figcaption {
  padding: 12px 14px;
  border-top: 2px solid var(--line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-3);
}

.page-about .about-fig--hero {
  margin-top: clamp(32px, 5vw, 56px);
  box-shadow: var(--shadow);
}

/* ---------- 章节目录 ---------- */
.page-about .about-index {
  margin-top: clamp(28px, 4vw, 44px);
}

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

.page-about .about-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 14px;
  border: 2px solid var(--line);
  background: var(--night);
  color: var(--ink-2);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  border-color: var(--mint);
  color: var(--mint);
  transform: translateY(-2px);
}

.page-about .about-index .idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
}

/* ---------- 章节骨架 ---------- */
.page-about .section {
  padding-block: var(--about-space);
}

.page-about .about-chapter-head {
  display: flex;
  align-items: flex-start;
  gap: clamp(14px, 3vw, 28px);
  padding-bottom: 18px;
  border-bottom: 2px solid var(--line);
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .chapter-num {
  font-family: var(--font-serif);
  font-size: clamp(52px, 11vw, 96px);
  line-height: 0.86;
  color: var(--track);
  -webkit-text-stroke: 1px var(--line);
  letter-spacing: -0.03em;
  flex: 0 0 auto;
}

.page-about .about-chapter-titles {
  padding-top: 6px;
}

.page-about .chapter-title {
  font-size: clamp(24px, 4.6vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0;
  color: var(--ink);
}

.page-about .about-body,
.page-about .prose {
  max-width: var(--about-measure);
}

.page-about .about-body p {
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 1.2em;
}

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

.page-about .about-body strong {
  color: var(--mint);
  font-weight: 600;
}

.page-about .h3 {
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin: 0 0 10px;
}

/* ---------- 赛季刻度 ---------- */
.page-about .season-ruler {
  list-style: none;
  display: flex;
  margin: clamp(30px, 4vw, 52px) 0 0;
  padding: 0 0 6px;
  border-top: 2px solid var(--line);
  overflow-x: auto;
  scrollbar-color: var(--track) var(--night);
}

.page-about .season-ruler li {
  flex: 1 0 auto;
  min-width: 116px;
  padding: 18px 14px 8px;
  border-left: 2px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
}

.page-about .season-ruler li::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 14px;
  width: 2px;
  height: 12px;
  background: var(--mint);
}

.page-about .season-label {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  color: var(--mint);
  letter-spacing: 0.02em;
}

.page-about .season-note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-3);
}

/* ---------- 分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

/* ---------- 流程轨道 ---------- */
.page-about .flow {
  margin-top: clamp(30px, 4vw, 52px);
}

.page-about .flow-track {
  display: block;
  width: 100%;
  height: 40px;
  margin-bottom: 6px;
}

.page-about .flow-track-line {
  stroke: var(--line);
  stroke-width: 2;
  stroke-dasharray: 6 10;
}

.page-about .flow-track-dot {
  fill: var(--night);
  stroke: var(--mint);
  stroke-width: 2;
}

.page-about .flow-rail {
  list-style: none;
  margin: 0;
  padding: 4px 4px 20px;
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-color: var(--track) var(--night);
}

.page-about .flow-step {
  scroll-snap-align: start;
  flex: 0 0 82%;
  min-width: 0;
  padding: 22px 20px 24px;
  border: 2px solid var(--line);
  background: var(--stand);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .flow-step:hover,
.page-about .flow-step:focus-within {
  border-color: var(--mint);
  transform: translateY(-2px);
}

.page-about .flow-num {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 34px;
  line-height: 1;
  color: var(--track);
  -webkit-text-stroke: 1px var(--mint);
  margin-bottom: 12px;
}

.page-about .flow-step p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
  margin: 0 0 12px;
}

.page-about .flow-out {
  border-top: 2px solid var(--line);
  padding-top: 12px;
}

.page-about .flow-k {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber);
  margin-bottom: 4px;
}

.page-about .flow-more {
  margin-top: 6px;
}

.page-about .flow-more summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mint);
  padding: 6px 0;
}

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

.page-about .flow-more summary::before {
  content: "+";
  font-size: 15px;
  line-height: 1;
  color: var(--mint);
}

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

.page-about .flow-more p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-3);
  margin: 6px 0 0;
}

/* ---------- 团队分工 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .team-card {
  border: 2px solid var(--line);
  background: var(--stand);
  transition: border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-about .team-card[open] {
  border-color: var(--mint);
  box-shadow: var(--shadow-sm);
}

.page-about .team-card summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .team-card summary::-webkit-details-marker {
  display: none;
}

.page-about .team-count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .team-name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .team-card p {
  margin: 0;
  padding: 0 18px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

/* ---------- 引用 ---------- */
.page-about .about-quote {
  margin: clamp(32px, 4vw, 52px) 0 0;
  padding: 24px 22px 22px;
  border-left: 6px solid var(--mint);
  border-top: 2px solid var(--line);
  border-right: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
  background: var(--track);
  box-shadow: var(--shadow-sm);
  max-width: 40em;
}

.page-about .about-quote blockquote {
  margin: 0;
}

.page-about .about-quote blockquote p {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.65;
  color: var(--ink);
  margin: 0;
}

.page-about .about-quote figcaption {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* ---------- 共建名单 ---------- */
.page-about .partner-list {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .partner-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  align-items: baseline;
  padding: 18px 18px 20px;
  border: 2px solid var(--line);
  border-left: 6px solid var(--amber);
  background: var(--stand);
}

.page-about .partner-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  grid-row: span 2;
}

.page-about .partner-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .partner-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-3);
}

/* ---------- 长期标准 ---------- */
.page-about .standard-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: std;
}

.page-about .standard-list li {
  counter-increment: std;
  padding: 22px 0 24px;
  border-top: 2px solid var(--line);
  display: grid;
  gap: 10px;
}

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

.page-about .standard-list li::before {
  content: "0" counter(std);
  font-family: var(--font-serif);
  font-size: 24px;
  line-height: 1;
  color: var(--track);
  -webkit-text-stroke: 1px var(--mint);
}

.page-about .standard-list p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-2);
  margin: 0;
  max-width: var(--about-measure);
}

/* ---------- 行动入口 ---------- */
.page-about .about-cta {
  margin-top: clamp(36px, 5vw, 64px);
  padding: clamp(22px, 3.6vw, 40px);
  border: 2px solid var(--line);
  background: var(--stand);
  box-shadow: var(--shadow);
}

.page-about .cta-title {
  font-size: clamp(22px, 3.6vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
}

.page-about .cta-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .cta-links li {
  border-top: 2px solid var(--line);
}

.page-about .cta-links a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 14px 4px 14px 0;
  color: var(--ink-2);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.6;
  transition: color 0.22s var(--ease), padding-left 0.22s var(--ease);
}

.page-about .cta-links a::after {
  content: "→";
  color: var(--mint);
  margin-left: auto;
}

.page-about .cta-links a:hover,
.page-about .cta-links a:focus-visible {
  color: var(--mint);
  padding-left: 8px;
}

.page-about .cta-k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
  flex: 0 0 auto;
}

/* ---------- 焦点可见 ---------- */
.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

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

  .page-about .partner-list li {
    grid-template-columns: 1fr;
    gap: 8px;
    align-content: start;
  }

  .page-about .partner-num {
    grid-row: auto;
  }

  .page-about .cta-links {
    grid-template-columns: 1fr 1fr;
    column-gap: 28px;
  }

  .page-about .cta-links li:nth-child(2) {
    border-top: 2px solid var(--line);
  }
}

@media (min-width: 980px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .about-split--reverse figure {
    order: -1;
  }

  .page-about .flow-step {
    flex-basis: 44%;
  }

  .page-about .about-quote {
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .flow-step,
  .page-about .cta-links a,
  .page-about .team-card {
    transition: none;
  }

  .page-about .about-index a:hover,
  .page-about .about-index a:focus-visible,
  .page-about .flow-step:hover,
  .page-about .flow-step:focus-within {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>