.page-about {
  --about-ink-soft: #4A515B;
  --about-chapter-gap: 22px;
}

/* 面包屑留白 */
.page-about .about-crumbs-wrap {
  padding-top: 22px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 32px 0 52px;
}

.page-about .about-hero-inner {
  display: grid;
  gap: 34px;
}

.page-about .about-kicker {
  margin: 0 0 16px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange);
  text-transform: uppercase;
}

.page-about .about-title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(31px, 6.4vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-lede {
  margin: 0;
  max-width: 40ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-fact {
  background: var(--panel);
  padding: 18px 16px;
}

.page-about .about-fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.2;
  color: var(--orange);
  margin-bottom: 6px;
}

.page-about .about-fact-label {
  display: block;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: 52px 0;
}

.page-about .about-section--rail {
  background: var(--ink-850);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-section--paper {
  background: var(--paper);
  color: var(--paper-ink);
}

.page-about .about-chapter {
  display: grid;
  gap: 12px;
}

.page-about .about-chapter .section-index {
  margin: 0;
  color: var(--orange);
  font-size: 13px;
  letter-spacing: 0.12em;
}

.page-about .about-chapter .section-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(25px, 4.6vw, 33px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-section--paper .about-chapter .section-title {
  color: var(--paper-ink);
}

.page-about .about-chapter .section-sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
  max-width: 46ch;
}

.page-about .about-section--paper .about-chapter .section-sub {
  color: var(--about-ink-soft);
}

.page-about .about-chapter-cols {
  display: grid;
  gap: 18px;
  margin-top: 6px;
}

.page-about .about-chapter-cols .prose {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  max-width: 42ch;
}

.page-about .prose {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-section--paper .prose {
  color: var(--about-ink-soft);
}

/* ---------- 视觉图 ---------- */
.page-about .about-visual {
  margin: 30px 0 0;
  position: relative;
}

.page-about .about-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--ink-700);
}

.page-about .about-section--paper .about-visual img {
  border-color: var(--paper-line);
}

.page-about .about-visual--wide img {
  aspect-ratio: 16 / 9;
}

.page-about .about-visual--square img {
  aspect-ratio: 1 / 1;
}

.page-about .about-visual--team {
  margin-top: 0;
}

.page-about .about-visual--team img {
  aspect-ratio: 3 / 2;
}

.page-about .about-visual figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-section--paper .about-visual figcaption {
  color: var(--about-ink-soft);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}

.page-about .season {
  position: relative;
  padding: 0 0 34px 42px;
}

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

.page-about .season::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 4px;
  width: 15px;
  height: 15px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--ink-850);
  border: 2px solid var(--line);
}

.page-about .season--now::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 90, 31, 0.18);
}

.page-about .season-tag {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .season--now .season-tag {
  color: var(--orange);
}

.page-about .season-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .season-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
  max-width: 48ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: 32px;
  margin-top: 26px;
}

.page-about .about-role {
  border-top: 1px solid var(--paper-line);
  padding: 16px 0 18px;
}

.page-about .about-role:last-child {
  border-bottom: 1px solid var(--paper-line);
}

.page-about .about-role-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .about-role-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--paper-ink);
}

.page-about .about-role-count {
  font-size: 14px;
  color: var(--orange);
}

.page-about .about-role-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--about-ink-soft);
}

/* ---------- 协作关系图 ---------- */
.page-about .about-flow {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 16px;
  max-width: 460px;
}

.page-about .about-flow-line {
  stroke: var(--paper-line);
  stroke-width: 1.5;
  stroke-dasharray: 4 4;
}

.page-about .about-flow-dot {
  fill: var(--paper);
  stroke: var(--orange);
  stroke-width: 2;
}

.page-about .about-flow-dot--last {
  stroke: var(--cyan);
}

.page-about .about-flow-num {
  fill: var(--paper-ink);
  font-family: var(--font-mono);
  font-size: 15px;
  text-anchor: middle;
}

.page-about .about-flow-label {
  fill: var(--paper-ink);
  font-family: var(--font-body);
  font-size: 14px;
  text-anchor: middle;
}

.page-about .about-flow-meta {
  fill: var(--about-ink-soft);
  font-size: 12px;
  text-anchor: middle;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

.page-about .about-coverage-lead {
  display: grid;
  gap: 16px;
}

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

.page-about .about-coverage-item {
  background: var(--panel);
  padding: 16px 18px;
  display: grid;
  gap: 4px;
}

.page-about .about-coverage-num {
  font-size: 24px;
  line-height: 1.2;
  color: var(--orange);
}

.page-about .about-coverage-label {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text);
}

/* ---------- 内容标准 ---------- */
.page-about .about-standards {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

.page-about .about-standards-text {
  display: grid;
  gap: 16px;
}

.page-about .about-standards .about-visual--square {
  margin-top: 0;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 26px;
}

.page-about .about-partner {
  background: var(--panel);
  padding: 22px 20px;
}

.page-about .about-partner-num {
  display: block;
  font-size: 24px;
  line-height: 1.2;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .about-partner-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-partner-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 结尾出口 ---------- */
.page-about .about-cta {
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-about .about-cta-text {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  max-width: 44ch;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-chapter-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
  }

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

@media (min-width: 900px) {
  .page-about .about-crumbs-wrap {
    padding-top: 28px;
  }

  .page-about .about-hero {
    padding: 44px 0 68px;
  }

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 56px;
  }

  .page-about .about-section {
    padding: 76px 0;
  }

  .page-about .about-chapter {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 0;
    align-items: start;
  }

  .page-about .about-chapter-body {
    max-width: 760px;
  }

  .page-about .about-timeline {
    max-width: 820px;
    margin-left: 72px;
  }

  .page-about .season {
    padding-bottom: 42px;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
    margin-top: 34px;
  }

  .page-about .about-coverage {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 54px;
    align-items: start;
  }

  .page-about .about-standards {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: center;
  }

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

  .page-about .about-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
  }

  .page-about .about-cta-text {
    margin: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow-line {
    stroke-dasharray: none;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>