.page-about {
  --about-line: color-mix(in srgb, var(--note) 28%, transparent);
  --about-gap: clamp(34px, 6vw, 68px);
  display: block;
  background: var(--paper);
  color: var(--text);
  overflow-x: clip;
}

/* ---------- 页首引子 ---------- */
.page-about .about-intro {
  position: relative;
  padding: clamp(26px, 4.5vw, 58px) 0 clamp(20px, 3.5vw, 42px);
  border-bottom: 2px solid var(--ink);
  margin-bottom: var(--about-gap);
}

.page-about .intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-2);
  align-items: end;
}

.page-about .intro-copy h1 {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(1.95rem, 8vw, 4.3rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  margin: var(--sp-2) 0 var(--sp-3);
  color: var(--ink);
}

.page-about .intro-lead {
  font-size: clamp(1rem, 2.3vw, 1.14rem);
  line-height: 1.88;
  color: var(--text);
  max-width: 40em;
  margin: 0;
}

.page-about .vertical-note {
  writing-mode: horizontal-tb;
  transform: none;
  font-size: 0.84rem;
  color: var(--note);
  margin: 0;
}

.page-about .intro-hand {
  display: inline-block;
  margin-top: var(--sp-3);
  padding: 8px 15px;
  background: color-mix(in srgb, var(--amber) 22%, transparent);
  border-left: 3px solid var(--amber);
  transform: rotate(-1.4deg);
  font-size: 0.94rem;
  color: var(--ink);
}

/* ---------- 通用节标题 ---------- */
.page-about .section-head {
  max-width: 44em;
  margin-bottom: var(--sp-4);
}

.page-about .section-head h2 {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(1.55rem, 5vw, 2.75rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: var(--sp-2) 0 var(--sp-2);
}

.page-about .section-lead {
  font-size: 1rem;
  line-height: 1.88;
  color: var(--text);
  margin: 0;
}

/* ---------- 01 时间轴 ---------- */
.page-about .timeline-section {
  padding: var(--about-gap) 0;
}

.page-about .timeline-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-4);
}

.page-about .timeline-figure {
  margin: 0;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  position: relative;
  display: grid;
  gap: 12px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(to bottom,
    var(--water) 0%,
    var(--water-lift) 45%,
    var(--cyan) 72%,
    var(--orange) 100%);
}

.page-about .timeline-node {
  position: relative;
}

.page-about .timeline-node::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 20px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--water-lift);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--cyan) 32%, transparent);
  z-index: 2;
}

.page-about .timeline-node details {
  background: var(--paper);
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color .22s ease, box-shadow .22s ease;
}

.page-about .timeline-node details[open] {
  border-color: var(--water);
  box-shadow: 0 8px 22px -16px color-mix(in srgb, var(--ink) 70%, transparent);
}

.page-about .timeline-node summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 15px 18px;
  user-select: none;
}

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

.page-about .timeline-node summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--f-mono);
  color: var(--water);
  font-size: 1rem;
  line-height: 1;
}

.page-about .timeline-node details[open] summary::after {
  content: "－";
}

.page-about .node-year {
  font-family: var(--f-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--water);
  background: color-mix(in srgb, var(--water) 12%, transparent);
  padding: 2px 10px;
  border-radius: var(--r-pill);
}

.page-about .node-title {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--ink);
}

.page-about .timeline-node p {
  margin: 0;
  padding: 0 18px 16px;
  line-height: 1.88;
  font-size: 0.96rem;
}

/* ---------- 02 团队 ---------- */
.page-about .team-section {
  padding: var(--about-gap) 0;
}

.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-3);
}

.page-about .team-figure {
  margin: 0;
}

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

.page-about .team-block {
  border-radius: var(--r-lg);
  padding: var(--sp-3);
  color: var(--paper);
  transition: transform .22s ease, box-shadow .22s ease;
}

.page-about .team-block--water {
  background: var(--water);
}

.page-about .team-block--orange {
  background: var(--orange);
  color: var(--ink);
}

.page-about .team-block--cyan {
  background: var(--cyan);
  color: var(--ink);
}

.page-about .team-block:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 28px -18px var(--ink);
}

.page-about .team-count {
  font-size: clamp(2rem, 6vw, 2.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  margin: 0 0 6px;
}

.page-about .team-block h3 {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 1.14rem;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.page-about .team-block p {
  margin: 0;
  line-height: 1.82;
  font-size: 0.94rem;
}

/* ---------- 03 主场地图 ---------- */
.page-about .map-section {
  padding: var(--about-gap) 0;
}

.page-about .map-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-3);
  align-items: center;
}

.page-about .map-copy p {
  line-height: 1.88;
  margin: 0 0 var(--sp-3);
}

.page-about .map-fields {
  list-style: none;
  margin: 0 0 var(--sp-3);
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .map-fields li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 14px;
  border-radius: var(--r-sm);
  background: color-mix(in srgb, var(--ink) 6%, transparent);
  border-left: 3px solid var(--cyan);
  font-size: 0.94rem;
  line-height: 1.7;
}

.page-about .map-fields .mono {
  color: var(--water);
  font-weight: 700;
  font-size: 0.84rem;
  letter-spacing: 0.06em;
}

.page-about .map-hand {
  display: inline-block;
  transform: rotate(1.2deg);
  color: var(--water);
  font-size: 0.92rem;
  margin: 0;
}

.page-about .map-figure {
  margin: 0;
}

/* ---------- 04 多联赛统计 ---------- */
.page-about .stats-section {
  padding: var(--about-gap) 0;
}

.page-about .stats-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .stat-card {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-lg);
  padding: var(--sp-4) var(--sp-3);
}

.page-about .stat-card::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -50px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 32%,
    color-mix(in srgb, var(--cyan) 42%, transparent),
    transparent 72%);
  pointer-events: none;
}

.page-about .stat-num {
  font-size: clamp(2rem, 7vw, 3.1rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.05em;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-about .stat-label {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 1rem;
  margin: 0 0 12px;
  color: var(--paper);
}

.page-about .stat-card p:last-child {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.84;
  opacity: .88;
  position: relative;
  z-index: 1;
}

/* ---------- 05 版本节奏带 ---------- */
.page-about .versions-section {
  padding: var(--about-gap) 0;
}

.page-about .version-band {
  list-style: none;
  margin: 0;
  padding: 0 0 var(--sp-2);
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .version-band li {
  flex: 0 0 auto;
  scroll-snap-align: start;
  min-width: 124px;
  padding: 16px 18px;
  border-radius: var(--r-md);
  background: var(--ink);
  color: var(--paper);
  border: 1px solid color-mix(in srgb, var(--cyan) 26%, transparent);
  display: grid;
  gap: 8px;
}

.page-about .version-band li:last-child {
  background: var(--water);
  border-color: var(--cyan);
}

.page-about .band-year {
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--cyan);
}

.page-about .version-band li:last-child .band-year {
  color: var(--paper);
}

.page-about .band-tag {
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  opacity: .9;
}

/* ---------- 06 长期做法 ---------- */
.page-about .principles-section {
  padding: var(--about-gap) 0;
}

.page-about .principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-3);
}

.page-about .principle {
  border-top: 3px solid var(--water);
  padding-top: 16px;
}

.page-about .principle:nth-child(2) {
  border-top-color: var(--orange);
}

.page-about .principle:nth-child(3) {
  border-top-color: var(--cyan);
}

.page-about .principle h3 {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 1.18rem;
  margin: 0 0 10px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about .principle p {
  margin: 0;
  line-height: 1.88;
  font-size: 0.96rem;
}

/* ---------- 收尾入口 ---------- */
.page-about .about-cta {
  margin: var(--about-gap) 0 var(--sp-5);
  padding: var(--sp-4) var(--sp-3);
  border-radius: var(--r-lg);
  background: var(--ink);
  color: var(--paper);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-3);
}

.page-about .about-cta h2 {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 4vw, 1.95rem);
  line-height: 1.15;
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0;
  line-height: 1.86;
  font-size: 0.96rem;
  opacity: .9;
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

.page-about .cta-links .btn {
  border-color: color-mix(in srgb, var(--paper) 42%, transparent);
  color: var(--paper);
  background: transparent;
}

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

/* ---------- 图片与响应式 ---------- */
.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

@media (min-width: 760px) {
  .page-about .vertical-note {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: 0.78rem;
    letter-spacing: 0.2em;
    justify-self: end;
  }

  .page-about .intro-grid {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--sp-3);
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .map-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }

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

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

@media (min-width: 1024px) {
  .page-about .timeline-wrap {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: center;
    padding: var(--sp-5) var(--sp-4);
  }

  .page-about .cta-links {
    justify-content: flex-end;
  }

  .page-about .timeline-node summary {
    padding: 17px 22px;
  }

  .page-about .timeline-node p {
    padding: 0 22px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }

  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}
<<<END>>>