.page-about {
  --about-line: rgba(36, 72, 59, .55);
  --about-line-light: rgba(216, 207, 184, .28);
  --about-paper-hover: #EDE4D0;
  --about-body-w: 62ch;
}

.page-about .about-crumb-wrap {
  padding-top: 20px;
  padding-bottom: 4px;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--moss-500);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(47, 208, 255, .16) 0%, rgba(47, 208, 255, 0) 58%),
    radial-gradient(90% 80% at 0% 100%, rgba(255, 106, 26, .18) 0%, rgba(255, 106, 26, 0) 60%),
    var(--ink-900);
  color: var(--cream-50);
  padding: 36px 0 48px;
  border-bottom: 2px solid var(--orange-500);
}

.page-about .hero-grid {
  display: grid;
  gap: 36px;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--blue-400);
  margin: 0 0 18px;
}

.page-about .hero-copy h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 60px);
  line-height: 1.14;
  letter-spacing: -.02em;
  max-width: 20ch;
}

.page-about .lede {
  margin: 20px 0 0;
  max-width: 40ch;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255, 248, 236, .78);
}

.page-about .hero-stats {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--about-line-light);
}

.page-about .hero-stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-line-light);
}

.page-about .hero-stat dt {
  font-size: 13px;
  letter-spacing: .06em;
  color: rgba(255, 248, 236, .66);
  order: 2;
}

.page-about .hero-stat dd {
  margin: 0;
  order: 1;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .hero-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1;
  color: var(--orange-500);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-stat:nth-child(2) .hero-num {
  color: var(--cream-50);
}

.page-about .hero-stat:nth-child(3) .hero-num {
  color: var(--blue-400);
}

.page-about .hero-unit {
  font-size: 14px;
  color: rgba(255, 248, 236, .6);
}

.page-about .hero-annot {
  display: none;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  padding: 52px 0 56px;
  position: relative;
}

.page-about .about-sec--paper {
  background: var(--paper-100);
  color: var(--ink-900);
}

.page-about .about-sec--ink {
  background: var(--ink-900);
  color: var(--cream-50);
}

.page-about .about-sec--cut::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--orange-500);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 0);
  opacity: .9;
}

.page-about .sec-grid {
  display: grid;
  gap: 14px;
}

.page-about .sec-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--orange-deep);
  display: block;
}

.page-about .about-sec--ink .sec-num {
  color: var(--orange-500);
}

.page-about .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.28;
  letter-spacing: -.01em;
  max-width: 22ch;
}

.page-about .sec-intro {
  margin: 14px 0 0;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-sec--paper .sec-intro {
  color: rgba(7, 19, 15, .72);
}

.page-about .about-sec--ink .sec-intro {
  color: var(--muted);
}

.page-about .sec-body {
  max-width: var(--about-body-w);
}

.page-about .prose p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-sec--paper .prose p {
  color: rgba(7, 19, 15, .82);
}

.page-about .about-sec--ink .prose p {
  color: rgba(255, 248, 236, .78);
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.page-about .tl-item {
  position: relative;
  flex: none;
  padding: 0 0 26px 22px;
  border-left: 1px solid var(--about-line);
  outline: none;
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .tl-dot {
  position: absolute;
  top: 5px;
  left: -5px;
  width: 9px;
  height: 9px;
  background: var(--orange-500);
  border-radius: 50%;
  transition: transform .18s var(--ease);
}

.page-about .tl-item:hover .tl-dot,
.page-about .tl-item:focus-within .tl-dot {
  transform: scale(1.9);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, .18);
}

.page-about .tl-year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: .04em;
  color: var(--blue-400);
}

.page-about .tl-title {
  margin: 6px 0 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .tl-text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 版本对照 ---------- */
.page-about .ver-layout {
  margin-top: 30px;
  display: grid;
  gap: 26px;
}

.page-about .ver-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--about-line);
  -webkit-overflow-scrolling: touch;
}

.page-about .ver-table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.65;
}

.page-about .ver-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--orange-deep);
  background: var(--paper-100);
  border-bottom: 1px solid var(--about-line);
}

.page-about .ver-table thead th {
  background: var(--paper-300);
  color: var(--ink-900);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .ver-table tbody th,
.page-about .ver-table tbody td {
  padding: 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(36, 72, 59, .28);
  background: var(--paper-100);
  transition: background .16s linear;
}

.page-about .ver-table tbody tr:last-child th,
.page-about .ver-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .ver-table th:first-child,
.page-about .ver-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 1;
}

.page-about .ver-table tbody tr:hover th,
.page-about .ver-table tbody tr:hover td,
.page-about .ver-table tbody tr:focus-within th,
.page-about .ver-table tbody tr:focus-within td {
  background: var(--about-paper-hover);
}

.page-about .ver-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .06em;
  padding: 3px 8px;
  border: 1px solid var(--moss-500);
  color: var(--ink-900);
}

.page-about .ver-tag--home {
  border-color: var(--orange-deep);
  color: var(--orange-deep);
}

.page-about .ver-tag--away {
  border-color: #1D7F9C;
  color: #1D7F9C;
}

.page-about .ver-tag--now {
  background: var(--orange-500);
  border-color: var(--orange-500);
  color: var(--ink-900);
}

.page-about .ver-year {
  font-family: var(--font-mono);
  color: rgba(7, 19, 15, .7);
}

.page-about .ver-figure {
  margin: 0;
  border: 1px solid var(--about-line);
}

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

.page-about .ver-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: rgba(7, 19, 15, .66);
  border-top: 1px solid var(--about-line);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  margin-top: 30px;
  display: grid;
  gap: 1px;
  background: var(--about-line-light);
  border: 1px solid var(--about-line-light);
}

.page-about .team-card {
  background: var(--ink-700);
  padding: 22px 20px 24px;
  transition: background .18s linear;
}

.page-about .team-card:hover {
  background: #123028;
}

.page-about .team-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 44px;
  line-height: 1;
  color: var(--orange-500);
  font-variant-numeric: tabular-nums;
}

.page-about .team-role {
  margin: 10px 0 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cream-50);
}

.page-about .team-card p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .team-note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--blue-400);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 248, 236, .72);
  max-width: 60ch;
}

/* ---------- 数据流程 ---------- */
.page-about .flow-grid {
  margin-top: 30px;
  display: grid;
  gap: 26px;
}

.page-about .flow-media {
  margin: 0;
  border: 1px solid var(--about-line);
  background: var(--paper-300);
}

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

.page-about .flow-media figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: rgba(7, 19, 15, .68);
  border-top: 1px solid var(--about-line);
}

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

.page-about .flow-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(36, 72, 59, .24);
}

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

.page-about .flow-step {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  color: var(--orange-deep);
  letter-spacing: .04em;
  padding-top: 2px;
}

.page-about .flow-title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .flow-item p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(7, 19, 15, .76);
}

/* ---------- 覆盖范围 ---------- */
.page-about .cov-media {
  margin: 28px 0 0;
  border: 1px solid var(--about-line-light);
  position: relative;
}

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

.page-about .cov-media figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--about-line-light);
}

.page-about .cov-tags {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .cov-tag {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 16px;
  border: 1px solid var(--about-line-light);
  font-size: 13px;
  line-height: 1.5;
  color: rgba(255, 248, 236, .74);
  background: rgba(14, 33, 27, .72);
  flex: 1 1 200px;
}

.page-about .cov-tag b {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--blue-400);
}

.page-about .cov-tag--home b {
  color: var(--orange-500);
}

.page-about .cov-tag--away b {
  color: var(--cream-50);
}

.page-about .cov-link {
  margin: 26px 0 0;
}

/* ---------- 合作 ---------- */
.page-about .partner-grid {
  margin-top: 30px;
  display: grid;
  gap: 20px;
}

.page-about .partner-col {
  padding: 20px 18px 22px;
  border-top: 2px solid var(--orange-deep);
  background: rgba(255, 255, 255, .42);
}

.page-about .partner-col:nth-child(2) {
  border-top-color: #1D7F9C;
}

.page-about .partner-col:nth-child(3) {
  border-top-color: var(--moss-500);
}

.page-about .partner-title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink-900);
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .partner-title .num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--orange-deep);
}

.page-about .partner-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .partner-list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(7, 19, 15, .78);
}

.page-about .partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 5px;
  height: 5px;
  background: var(--orange-deep);
}

.page-about .about-cta {
  margin-top: 34px;
  padding: 24px 20px;
  background: var(--ink-900);
  color: var(--cream-50);
  display: grid;
  gap: 18px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), 0 100%);
}

.page-about .about-cta p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 248, 236, .82);
  max-width: 56ch;
}

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

/* ---------- 媒体查询 ---------- */
@media (min-width: 720px) {
  .page-about .about-sec {
    padding: 64px 0 72px;
  }

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

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

  .page-about .about-cta {
    padding: 30px 28px;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 52px 0 64px;
  }

  .page-about .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .hero-annot {
    display: block;
    position: absolute;
    top: 64px;
    right: 18px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .3em;
    color: rgba(255, 248, 236, .38);
  }

  .page-about .sec-grid {
    grid-template-columns: 56px minmax(0, 1fr);
    column-gap: 28px;
    align-items: start;
  }

  .page-about .sec-num {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    padding-top: 4px;
  }

  .page-about .about-sec {
    padding: 76px 0 84px;
  }

  /* 横向时间轴 */
  .page-about .tl {
    flex-direction: row;
    margin-top: 40px;
    padding-bottom: 12px;
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .page-about .tl-item {
    flex: 0 0 244px;
    border-left: 0;
    border-top: 1px solid var(--about-line);
    padding: 26px 22px 4px 0;
  }

  .page-about .tl-item:last-child {
    border-left: 0;
    border-top-color: var(--about-line);
  }

  .page-about .tl-dot {
    top: -5px;
    left: 0;
  }

  .page-about .tl-text {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .28s var(--ease), opacity .2s linear;
  }

  .page-about .tl-item:hover .tl-text,
  .page-about .tl-item:focus-within .tl-text,
  .page-about .tl-item:focus .tl-text {
    max-height: 130px;
    opacity: 1;
  }

  .page-about .ver-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 28px;
    align-items: start;
  }

  .page-about .flow-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 40px;
    align-items: start;
    margin-top: 40px;
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 1180px) {
  .page-about .ver-layout {
    grid-template-columns: minmax(0, 1fr) 340px;
  }

  .page-about .about-sec {
    padding: 88px 0 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-dot,
  .page-about .tl-text,
  .page-about .team-card,
  .page-about .ver-table tbody th,
  .page-about .ver-table tbody td {
    transition: none;
  }

  .page-about .tl-item:hover .tl-dot,
  .page-about .tl-item:focus-within .tl-dot {
    transform: none;
  }
}
<<<END>>>