.page-about {
  background: var(--cream);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 104px 0 0;
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(226, 85, 43, 0.28) 0%, rgba(226, 85, 43, 0) 58%),
    linear-gradient(168deg, #0B1512 0%, var(--pine) 58%, var(--pine-mid) 100%);
  color: var(--white-warm);
}

.page-about .about-hero .breadcrumb-list,
.page-about .about-hero .breadcrumb-item {
  color: var(--river-mist);
}

.page-about .about-hero .breadcrumb-item a {
  color: var(--white-warm);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .hero-split {
  display: grid;
  gap: 32px;
  margin-top: 22px;
  padding-bottom: 48px;
}

.page-about .hero-copy {
  min-width: 0;
}

.page-about .about-hero .eyebrow {
  color: var(--sunset-soft);
}

.page-about .about-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 8.4vw, 76px);
  line-height: 0.98;
  letter-spacing: -0.01em;
  color: var(--white-warm);
  overflow-wrap: anywhere;
}

.page-about .about-title span {
  display: block;
  color: var(--sunset-soft);
}

.page-about .hero-copy .lead {
  margin-top: 22px;
  max-width: 38em;
  color: rgba(255, 251, 244, 0.86);
  font-size: 17px;
  line-height: 1.75;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .hero-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  align-self: end;
  border: 2px solid var(--sunset);
  border-radius: var(--radius);
  background: rgba(11, 21, 18, 0.55);
  box-shadow: 6px 6px 0 rgba(226, 85, 43, 0.85);
}

.page-about .board-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  border-right: 1px solid rgba(168, 203, 224, 0.22);
  border-bottom: 1px solid rgba(168, 203, 224, 0.22);
}

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

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

.page-about .board-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  color: var(--white-warm);
}

.page-about .board-item:first-child .board-num {
  color: var(--sunset-soft);
}

.page-about .board-label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--river-mist);
}

.page-about .hero-figure {
  margin: 0 0 -2px;
  border-top: 3px solid var(--sunset);
}

.page-about .hero-figure img {
  width: 100%;
  height: clamp(180px, 32vw, 320px);
  object-fit: cover;
  display: block;
}

/* ---------- 时间线主干 ---------- */
.page-about .about-track-section {
  padding-top: clamp(40px, 7vw, 76px);
}

.page-about .track-grid {
  display: grid;
  gap: 26px;
}

.page-about .track-index {
  background: var(--white-warm);
  border: 2px solid var(--pine);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  padding: 16px 16px 12px;
}

.page-about .track-index-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pine);
}

.page-about .track-index-list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .track-index-list li {
  flex: 0 0 auto;
}

.page-about .track-index-list a {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 12px;
  border: 2px solid var(--gravel);
  border-radius: var(--radius);
  background: var(--cream);
  color: var(--pine);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.16s ease, color 0.16s ease, background 0.16s ease;
}

.page-about .track-index-list a:hover,
.page-about .track-index-list a:focus-visible {
  border-color: var(--sunset);
  background: #fff;
  color: var(--sunset);
}

.page-about .track-index-list a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .track-index-year {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 13px;
  color: var(--river);
}

.page-about .track-body {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.page-about .track-item {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--white-warm);
  border: 2px solid var(--pine);
  border-left: 8px solid var(--sunset);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  scroll-margin-top: 96px;
}

.page-about .track-year {
  margin: 0;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--sunset);
}

.page-about .track-title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 4.6vw, 30px);
  line-height: 1.18;
  letter-spacing: -0.005em;
  color: var(--pine);
}

.page-about .track-text {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: #23302C;
  max-width: 38em;
}

.page-about .track-figure {
  margin: 20px 0 0;
  border: 2px solid var(--pine);
}

.page-about .track-figure img {
  display: block;
  width: 100%;
  height: clamp(170px, 30vw, 260px);
  object-fit: cover;
}

/* ---------- 区块头 ---------- */
.page-about .section-head {
  max-width: 720px;
  margin-bottom: 28px;
}

.page-about .section-lead {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: #33403B;
}

.page-about .display-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 5.4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--pine);
}

/* ---------- 团队分工 ---------- */
.page-about .crew-section {
  background: linear-gradient(180deg, var(--cream) 0%, #EFE7DA 100%);
  border-top: 2px solid var(--pine);
  border-bottom: 2px solid var(--pine);
}

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

.page-about .crew-card {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--white-warm);
  border: 2px solid var(--pine);
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 var(--pine-mid);
}

.page-about .crew-card:nth-child(odd) {
  border-top: 6px solid var(--river);
}

.page-about .crew-card:nth-child(even) {
  border-top: 6px solid var(--sunset);
}

.page-about .crew-count {
  margin: 0;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 20px;
  color: var(--sunset);
}

.page-about .crew-card:nth-child(odd) .crew-count {
  color: var(--river);
}

.page-about .crew-role {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: 0.01em;
  color: var(--pine);
}

.page-about .crew-desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: #33403B;
}

/* ---------- 四步流程 ---------- */
.page-about .flow-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.page-about .flow-step {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--white-warm);
  border: 2px solid var(--pine);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: repeating-linear-gradient(
    -45deg,
    var(--sunset) 0 10px,
    var(--sunset-soft) 10px 20px
  );
}

.page-about .flow-step::after {
  content: "";
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 22px;
  height: 22px;
  background: var(--pine);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

.page-about .flow-num {
  margin: 4px 0 0;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--sunset);
}

.page-about .flow-name {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.2;
  color: var(--pine);
}

.page-about .flow-time {
  display: inline-block;
  margin: 10px 0 0;
  padding: 4px 9px;
  background: var(--pine);
  color: var(--white-warm);
  border-radius: 2px;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.03em;
}

.page-about .flow-desc {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: #33403B;
}

/* ---------- 覆盖范围 ---------- */
.page-about .coverage-section {
  background: var(--pine);
  color: var(--white-warm);
}

.page-about .coverage-section .eyebrow {
  color: var(--sunset-soft);
}

.page-about .coverage-section .display-title {
  color: var(--white-warm);
}

.page-about .coverage-section .section-lead {
  color: rgba(255, 251, 244, 0.82);
}

.page-about .coverage {
  display: grid;
  gap: 2px;
  border: 2px solid var(--pine-mid);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 30px;
}

.page-about .metric-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4px 14px;
  padding: 14px 16px;
  background: rgba(255, 251, 244, 0.06);
}

.page-about .metric-label {
  font-size: 14px;
  color: var(--river-mist);
}

.page-about .metric-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 19px;
  color: var(--sunset-soft);
  white-space: nowrap;
}

.page-about .metric-bar {
  grid-column: 1 / -1;
  display: block;
  height: 6px;
  background: rgba(168, 203, 224, 0.2);
  border-radius: 2px;
  overflow: hidden;
}

.page-about .metric-bar i {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--river) 0%, var(--sunset) 100%);
}

.page-about .field-list {
  background: rgba(11, 21, 18, 0.4);
  border: 2px solid var(--pine-mid);
  border-radius: var(--radius);
  padding: 20px 18px 22px;
}

.page-about .field-list-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--white-warm);
}

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

.page-about .field-list li {
  position: relative;
  padding: 9px 10px 9px 24px;
  border: 1px solid var(--pine-mid);
  border-radius: 2px;
  font-size: 14px;
  color: var(--white-warm);
}

.page-about .field-list li::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  background: var(--cyan);
}

.page-about .field-note {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(255, 251, 244, 0.85);
}

.page-about .field-note a,
.page-about .partner-text a,
.page-about .closing-text a,
.page-about .contact-note a {
  color: var(--white-warm);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .field-note a:hover,
.page-about .partner-text a:hover,
.page-about .closing-text a:hover,
.page-about .contact-note a:hover {
  color: var(--sunset-soft);
}

/* ---------- 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 28px;
}

.page-about .partner-copy {
  min-width: 0;
}

.page-about .partner-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .partner-list li {
  padding: 14px 16px;
  background: var(--white-warm);
  border: 2px solid var(--pine);
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 var(--gravel);
  font-size: 14.5px;
  line-height: 1.72;
  color: #33403B;
}

.page-about .partner-list strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--pine);
}

.page-about .partner-text {
  margin: 20px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: #33403B;
}

.page-about .partner-text a {
  color: var(--river);
}

.page-about .partner-text a:hover {
  color: var(--sunset);
}

.page-about .partner-figure {
  margin: 0;
  border: 3px solid var(--pine);
  box-shadow: var(--shadow-hard);
}

.page-about .partner-figure img {
  display: block;
  width: 100%;
  height: clamp(220px, 52vw, 420px);
  object-fit: cover;
}

/* ---------- 收束区 ---------- */
.page-about .closing-section {
  border-top: 6px solid var(--sunset);
}

.page-about .eyebrow--light {
  color: var(--sunset-soft);
}

.page-about .closing-grid {
  display: grid;
  gap: 30px;
}

.page-about .closing-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 6vw, 46px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--white-warm);
}

.page-about .closing-text {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 251, 244, 0.86);
}

.page-about .closing-contact {
  border: 2px solid var(--pine-mid);
  border-radius: var(--radius);
  background: rgba(11, 21, 18, 0.42);
  padding: 6px 18px 18px;
}

.page-about .contact-row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--pine-mid);
}

.page-about .contact-row:last-of-type {
  border-bottom: 0;
}

.page-about .contact-key {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--river-mist);
}

.page-about .contact-val {
  font-size: 16px;
  line-height: 1.6;
  color: var(--white-warm);
  overflow-wrap: anywhere;
}

.page-about .contact-row:nth-child(3) .contact-val,
.page-about .contact-row:nth-child(4) .contact-val {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--sunset-soft);
}

.page-about .contact-note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(255, 251, 244, 0.78);
}

/* ---------- 滚动显现 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- 中等屏 ---------- */
@media (min-width: 620px) {
  .page-about .crew-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .contact-row {
    grid-template-columns: 104px 1fr;
    align-items: baseline;
    gap: 14px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 128px;
  }

  .page-about .hero-split {
    grid-template-columns: 1.4fr 1fr;
    align-items: end;
    gap: 48px;
    padding-bottom: 56px;
  }

  .page-about .hero-figure img {
    height: 320px;
  }

  .page-about .track-grid {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .track-index {
    position: sticky;
    top: 92px;
    padding: 18px 16px;
  }

  .page-about .track-index-list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .track-index-list a {
    width: 100%;
    padding: 9px 10px;
    border-color: transparent;
    background: transparent;
    border-left: 3px solid var(--gravel);
    border-radius: 0;
  }

  .page-about .track-index-list a:hover,
  .page-about .track-index-list a:focus-visible {
    border-left-color: var(--sunset);
    background: rgba(226, 85, 43, 0.08);
  }

  .page-about .track-item {
    padding: 28px 30px 30px;
  }

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

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

  .page-about .partner-grid {
    grid-template-columns: 1fr 0.85fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .closing-grid {
    grid-template-columns: 1.1fr 1fr;
    gap: 52px;
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-about .crew-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
<<<END>>>