.page-about {
  --rail-w: 200px;
  --about-gap: clamp(28px, 4vw, 60px);
  --about-pad: clamp(18px, 5vw, 56px);
}

/* ---------- 首屏 ---------- */
.page-about .about-masthead {
  position: relative;
  overflow: hidden;
  background: linear-gradient(158deg, #122A54 0%, #0B1524 82%);
  color: var(--paper);
  padding: clamp(28px, 5vw, 56px) 0 clamp(44px, 7vw, 96px);
}

.page-about .about-masthead::before {
  content: "";
  position: absolute;
  right: -120px;
  top: -160px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242,106,33,.3), transparent 66%);
  pointer-events: none;
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 76%;
  height: 46px;
  background: var(--paper);
  clip-path: polygon(0 100%, 100% 42%, 100% 100%);
  opacity: .06;
  pointer-events: none;
}

.page-about .about-masthead .breadcrumbs {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(24px, 4vw, 46px);
}

.page-about .about-masthead .breadcrumb-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .12em;
  color: rgba(246,241,231,.62);
}

.page-about .about-masthead .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(246,241,231,.32);
}

.page-about .about-masthead .breadcrumb-link {
  color: rgba(246,241,231,.72);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s ease, color .18s ease;
}

.page-about .about-masthead .breadcrumb-link:hover,
.page-about .about-masthead .breadcrumb-link:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-about .masthead-grid {
  position: relative;
  z-index: 1;
}

.page-about .masthead-lead {
  max-width: 62rem;
}

.page-about .about-masthead .section-kicker {
  color: var(--gold);
  font-size: 12px;
  letter-spacing: .16em;
  margin: 0 0 16px;
}

.page-about .about-masthead h1 {
  font-size: clamp(32px, 5.2vw, 70px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.012em;
  margin: 0;
  max-width: 17em;
}

.page-about .masthead-deck {
  margin: 24px 0 0;
  max-width: 40em;
  font-size: clamp(15.5px, 1.4vw, 18px);
  line-height: 1.88;
  color: rgba(246,241,231,.82);
}

.page-about .masthead-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 44px;
  margin: 36px 0 0;
  padding-top: 26px;
  border-top: 1px solid rgba(246,241,231,.18);
}

.page-about .stat-cell dt {
  font-size: 12px;
  letter-spacing: .12em;
  color: rgba(246,241,231,.56);
  margin-bottom: 8px;
}

.page-about .stat-cell dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 5px;
}

.page-about .stat-cell .stat-number {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 700;
  color: var(--paper);
  line-height: 1;
}

.page-about .stat-unit {
  font-size: 13px;
  color: rgba(246,241,231,.62);
}

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  display: block;
  padding: clamp(38px, 6vw, 78px) 0 clamp(56px, 8vw, 112px);
}

.page-about .year-rail {
  margin-bottom: 34px;
}

.page-about .rail-title {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gray);
  margin: 0 0 12px;
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .toc-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 0 0 auto;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: var(--paper);
  text-decoration: none;
  color: var(--ink);
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}

.page-about .rail-year {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-about .rail-name {
  font-size: 13px;
  white-space: nowrap;
}

.page-about .toc-link:hover,
.page-about .toc-link:focus-visible {
  border-color: var(--indigo);
  transform: translateY(-2px);
}

.page-about .toc-link.is-active {
  background: var(--indigo);
  border-color: var(--indigo);
}

.page-about .toc-link.is-active .rail-name {
  color: var(--paper);
}

.page-about .toc-link.is-active .rail-year {
  color: var(--gold);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: clamp(30px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section .section-head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-section .section-kicker {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
  margin: 0 0 12px;
}

.page-about .about-section .section-title {
  font-size: clamp(24px, 3.2vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 0;
  max-width: 20em;
}

.page-about .prose p {
  max-width: var(--measure);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 18px;
}

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

.page-about .prose a {
  color: var(--indigo);
  text-decoration: none;
  border-bottom: 1px solid var(--blue);
  transition: color .18s ease, border-color .18s ease;
}

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

.page-about .section-more {
  margin: 26px 0 0;
  font-size: 14px;
  color: var(--gray);
}

.page-about .section-more a {
  color: var(--indigo);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: border-color .18s ease, color .18s ease;
}

.page-about .section-more a:hover,
.page-about .section-more a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 使命 ---------- */
.page-about .split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .split-media {
  margin: 0;
  position: relative;
}

.page-about .split-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: contrast(1.04) saturate(.94);
}

.page-about .split--media-right .split-media img {
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

.page-about .media-frame--tall img {
  aspect-ratio: 3 / 4;
}

.page-about .media-frame__caption {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gray);
}

.page-about .mission-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 28px 0 0;
}

/* ---------- 教练履历 ---------- */
.page-about .about-section--career {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(234,225,210,.55) 0%, rgba(246,241,231,0) 100%);
}

.page-about .career-bg {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(115deg, rgba(18,42,84,.07) 0 2px, transparent 2px 34px),
    radial-gradient(circle at 88% 12%, rgba(224,179,65,.2), transparent 58%);
  pointer-events: none;
}

.page-about .career-intro {
  position: relative;
  z-index: 1;
  margin-bottom: 26px;
}

.page-about .career-track {
  position: relative;
  z-index: 1;
  overflow-x: auto;
  overflow-y: hidden;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  padding: 18px 22px 10px;
  box-shadow: var(--shadow);
  scrollbar-width: thin;
}

.page-about .career-track:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.page-about .career-svg {
  display: block;
  width: 1180px;
  min-width: 1180px;
  height: auto;
}

.page-about .career-tick {
  font-family: var(--font-mono);
  font-size: 15px;
  fill: #6B7480;
}

.page-about .career-legend {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  align-items: center;
  margin-top: 16px;
  font-size: 13px;
  color: var(--ink);
}

.page-about .legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .legend-swatch {
  width: 22px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
}

.page-about .legend-swatch--long {
  background: var(--indigo);
}

.page-about .legend-swatch--short {
  background: var(--green);
}

.page-about .legend-hint {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gray);
}

.page-about .career-notes {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .note-panel {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 0;
}

.page-about .note-panel summary {
  cursor: pointer;
  padding: 14px 18px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--indigo);
  list-style: none;
}

.page-about .note-panel summary::-webkit-details-marker {
  display: none;
}

.page-about .note-panel summary::after {
  content: "＋";
  float: right;
  font-weight: 400;
  color: var(--orange);
}

.page-about .note-panel[open] summary::after {
  content: "－";
}

.page-about .note-panel p {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink);
  max-width: var(--measure);
}

/* ---------- 发展历程 ---------- */
.page-about .history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .history-node {
  border: 1px solid var(--line);
  border-left: 4px solid var(--indigo);
  background: var(--paper);
  transition: border-left-color .18s ease, box-shadow .18s ease;
}

.page-about .history-node[open] {
  border-left-color: var(--orange);
  box-shadow: var(--shadow);
}

.page-about .history-node summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .history-node summary::-webkit-details-marker {
  display: none;
}

.page-about .history-year {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 700;
  color: var(--indigo);
  flex: 0 0 auto;
  min-width: 4.6em;
}

.page-about .history-node[open] .history-year {
  color: var(--orange);
}

.page-about .history-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
}

.page-about .history-node p {
  margin: 0;
  padding: 0 20px 20px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  max-width: var(--measure);
}

/* ---------- 团队 ---------- */
.page-about .about-section--team {
  background: linear-gradient(180deg, rgba(18,42,84,.05) 0%, rgba(246,241,231,0) 100%);
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .team-figure {
  margin: 0;
  max-width: 260px;
}

.page-about .team-figure svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .team-figure circle {
  transition: stroke-width .18s ease, opacity .18s ease;
}

.page-about .team-figure circle:hover {
  stroke-width: 37;
}

.page-about .team-figure-num {
  font-family: var(--font-mono);
  font-size: 46px;
  font-weight: 700;
  fill: #0B1524;
}

.page-about .team-figure-cap {
  font-size: 12px;
  fill: #6B7480;
  letter-spacing: .1em;
}

.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .team-item {
  position: relative;
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.page-about .team-dot {
  position: absolute;
  left: -6px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.page-about .team-dot--a { background: var(--indigo); }
.page-about .team-dot--b { background: var(--orange); }
.page-about .team-dot--c { background: var(--green); }
.page-about .team-dot--d { background: var(--gold); }

.page-about .team-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink);
  max-width: var(--measure);
}

/* ---------- 协作 ---------- */
.page-about .partner-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 48px;
  margin: 34px 0 0;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-about .partner-stats dt {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gray);
  margin-bottom: 8px;
}

.page-about .partner-stats dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 5px;
}

.page-about .partner-stats .stat-number {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 700;
  color: var(--indigo);
  line-height: 1;
}

.page-about .partner-stats .stat-unit {
  font-size: 13px;
  color: var(--gray);
}

/* ---------- 档案 ---------- */
.page-about .archive-lead {
  margin-bottom: 26px;
}

.page-about .archive-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
}

.page-about .archive-table caption {
  text-align: left;
  padding: 0 0 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gray);
}

.page-about .archive-table th,
.page-about .archive-table td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.page-about .archive-table thead th {
  background: var(--ink);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .12em;
  font-weight: 600;
}

.page-about .archive-table tbody th {
  font-weight: 700;
  color: var(--indigo);
}

.page-about .archive-table tbody tr:nth-child(even) {
  background: rgba(234,225,210,.5);
}

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

.page-about .archive-meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 28px;
}

.page-about .meta-cell {
  padding: 16px 18px;
  border-top: 3px solid var(--gold);
  background: var(--sand);
}

.page-about .meta-label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gray);
}

.page-about .meta-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  margin-top: clamp(24px, 4vw, 44px);
  padding: clamp(28px, 4vw, 48px) var(--about-pad);
  background: var(--indigo);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -100px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242,106,33,.34), transparent 68%);
  pointer-events: none;
}

.page-about .cta-kicker {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-cta h2 {
  margin: 0;
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight: 800;
  line-height: 1.25;
  max-width: 22em;
  position: relative;
  z-index: 1;
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
  position: relative;
  z-index: 1;
}

.page-about .about-cta .btn-primary {
  background: var(--orange);
  color: var(--ink);
  border-color: var(--orange);
}

.page-about .about-cta .btn-primary:hover,
.page-about .about-cta .btn-primary:focus-visible {
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .about-cta .btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(246,241,231,.46);
}

.page-about .about-cta .btn-ghost:hover,
.page-about .about-cta .btn-ghost:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 700px) {
  .page-about .split--media-right {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .split:not(.split--media-right) {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
  }

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

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

  .page-about .team-figure {
    max-width: 240px;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

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

/* ---------- 桌面：左窄右宽编辑部网格 ---------- */
@media (min-width: 980px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    column-gap: var(--about-gap);
    align-items: start;
  }

  .page-about .year-rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    margin-bottom: 0;
    padding-right: 4px;
    border-right: 1px solid var(--line);
  }

  .page-about .rail-list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .toc-link {
    border: 0;
    border-left: 3px solid transparent;
    background: transparent;
    padding: 9px 10px 9px 14px;
    transition: border-color .18s ease, background .18s ease, transform .18s ease;
  }

  .page-about .toc-link:hover,
  .page-about .toc-link:focus-visible {
    background: rgba(234,225,210,.6);
    transform: translateX(4px);
  }

  .page-about .toc-link.is-active {
    background: rgba(18,42,84,.06);
    border-left-color: var(--orange);
  }

  .page-about .toc-link.is-active .rail-name {
    color: var(--indigo);
  }

  .page-about .about-column {
    min-width: 0;
  }

  .page-about .about-section + .about-section {
    margin-top: 6px;
  }
}

@media (min-width: 1180px) {
  .page-about .masthead-deck {
    font-size: 18.5px;
  }

  .page-about .history-node summary {
    padding: 20px 26px;
  }

  .page-about .history-node p {
    padding: 0 26px 24px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .toc-link,
  .page-about .history-node,
  .page-about .team-figure circle {
    transition: none;
  }
}
<<<END>>>