.page-about {
  --about-rail: 168px;
  --about-note: 48px;
  --about-edge: #0a1c2d;

  position: relative;
  background: var(--abyss);
  color: var(--ice);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(14px, 2.6vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(22px, 4vw, 46px) 0 clamp(44px, 7vw, 86px);
  border-bottom: 1px solid var(--grid);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.24;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(130% 96% at 10% 0%, #000 8%, transparent 74%);
  mask-image: radial-gradient(130% 96% at 10% 0%, #000 8%, transparent 74%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -24%;
  right: -12%;
  width: min(640px, 76vw);
  height: min(640px, 76vw);
  background: radial-gradient(circle, rgba(43, 232, 200, 0.14) 0%, rgba(43, 232, 200, 0) 62%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
  align-items: end;
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(200px, 268px) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  max-width: 320px;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--grid);
  filter: saturate(0.94) contrast(1.06);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 62px;
  height: 62px;
  border-top: 2px solid var(--cyan);
  border-right: 2px solid var(--cyan);
  pointer-events: none;
}

.page-about .about-hero__caption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  letter-spacing: 0.04em;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 5.6vw, 4.05rem);
  line-height: 1.07;
  letter-spacing: -0.022em;
  color: var(--ice);
}

.page-about .about-hero__title em {
  position: relative;
  font-style: normal;
  color: var(--cyan);
}

.page-about .about-hero__title em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.05em;
  height: 2px;
  background: var(--cyan);
  opacity: 0.42;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: clamp(0.95rem, 1.5vw, 1.06rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--grid);
  border: 1px solid var(--grid);
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-stats__item {
  background: var(--abyss);
  padding: 14px 16px 16px;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.3rem, 3vw, 1.85rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  position: relative;
  padding: clamp(48px, 8vw, 104px) 0;
  border-bottom: 1px solid var(--grid);
}

.page-about .about-sec--panel {
  background: linear-gradient(180deg, var(--panel) 0%, #08182a 100%);
}

.page-about .about-sec__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.6vw, 26px);
}

@media (min-width: 940px) {
  .page-about .about-sec__grid {
    grid-template-columns: var(--about-rail) var(--about-note) minmax(0, 1fr);
    column-gap: 28px;
    align-items: start;
  }
}

.page-about .about-sec__index {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(3.2rem, 9vw, 6.2rem);
  font-weight: 700;
  line-height: 0.84;
  letter-spacing: -0.05em;
  color: rgba(22, 55, 79, 0.62);
  -webkit-text-stroke: 1px rgba(43, 232, 200, 0.3);
  user-select: none;
}

.page-about .about-sec__note {
  display: none;
}

@media (min-width: 940px) {
  .page-about .about-sec__note {
    display: block;
    align-self: start;
    margin-top: 8px;
    padding-left: 12px;
    border-left: 1px solid var(--grid);
    writing-mode: vertical-rl;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.3em;
    color: var(--mist);
  }
}

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

.page-about .about-sec__title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.4vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -0.018em;
  color: var(--ice);
}

.page-about .about-sec__text {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-sec__text--tail {
  margin-top: 26px;
}

.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 200, 0.45);
  padding-bottom: 1px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--ice);
  border-bottom-color: var(--ice);
}

/* ---------- 演进折线 ---------- */
.page-about .about-chart {
  position: relative;
  margin: 30px 0 0;
  padding: 20px 16px 12px;
  background: rgba(12, 35, 56, 0.6);
  border: 1px solid var(--grid);
}

.page-about .about-chart::before {
  content: "COVERAGE / SEASONS";
  position: absolute;
  top: 8px;
  left: 16px;
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: rgba(143, 169, 190, 0.7);
}

.page-about .about-chart__svg {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 8px;
}

.page-about .about-chart__gridlines line {
  stroke: var(--grid);
  stroke-width: 1;
}

.page-about .about-chart__area {
  fill: url(#aboutAreaFill);
}

.page-about .about-chart__line {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 700;
  stroke-dashoffset: 0;
}

.page-about .about-chart__dot {
  fill: var(--abyss);
  stroke: var(--cyan);
  stroke-width: 2;
  opacity: 0;
  transition: opacity 0.36s ease;
}

.page-about .about-chart__dot--last {
  fill: var(--cyan);
  stroke: var(--amber);
  stroke-width: 2;
}

.page-about .about-chart__caption {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--grid);
  font-size: 12px;
  line-height: 1.65;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-about .about-chart.is-in .about-chart__line {
  animation: about-draw 1.15s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

.page-about .about-chart.is-in .about-chart__dot {
  opacity: 1;
}

.page-about .about-chart.is-in .about-chart__dot:nth-child(1) { transition-delay: 0.08s; }
.page-about .about-chart.is-in .about-chart__dot:nth-child(2) { transition-delay: 0.22s; }
.page-about .about-chart.is-in .about-chart__dot:nth-child(3) { transition-delay: 0.36s; }
.page-about .about-chart.is-in .about-chart__dot:nth-child(4) { transition-delay: 0.5s; }
.page-about .about-chart.is-in .about-chart__dot:nth-child(5) { transition-delay: 0.64s; }
.page-about .about-chart.is-in .about-chart__dot:nth-child(6) { transition-delay: 0.78s; }
.page-about .about-chart.is-in .about-chart__dot:nth-child(7) { transition-delay: 0.92s; }

@keyframes about-draw {
  from { stroke-dashoffset: 700; }
  to { stroke-dashoffset: 0; }
}

/* ---------- 赛季阶段 ---------- */
.page-about .about-stages {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--grid);
  border: 1px solid var(--grid);
}

@media (min-width: 720px) {
  .page-about .about-stages {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .about-stages {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-stages__item {
  position: relative;
  background: var(--abyss);
  padding: 22px 18px 24px;
  transition: background 0.25s ease;
}

.page-about .about-stages__item::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(43, 232, 200, 0) 82%);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.55s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.page-about .about-stages__item.is-in::before {
  transform: scaleX(1);
}

.page-about .about-stages__item:hover {
  background: var(--about-edge);
}

.page-about .about-stages__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .about-stages__title {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ice);
}

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

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 40px);
  margin-top: 28px;
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .about-team__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--grid);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 25 / 16;
  object-fit: cover;
  filter: saturate(0.92);
}

.page-about .about-team__caption {
  padding: 12px 14px;
  border-top: 1px solid var(--grid);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--mist);
  background: rgba(6, 19, 32, 0.7);
}

.page-about .about-nodes {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-nodes__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--grid);
}

.page-about .about-nodes__item:last-child {
  border-bottom: 1px solid var(--grid);
}

.page-about .about-nodes__num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--coral);
  padding-top: 3px;
}

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

.page-about .about-nodes__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ice);
}

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

/* ---------- 合作与备案 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 40px);
  margin-top: 28px;
}

@media (min-width: 900px) {
  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

.page-about .about-partners__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--grid);
  align-self: stretch;
}

.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 220px;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.9) brightness(0.92);
}

.page-about .about-partners__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--grid);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--mist);
  background: rgba(6, 19, 32, 0.72);
}

.page-about .about-topics {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-topics__item {
  position: relative;
  padding: 0 0 18px 18px;
  border-left: 1px solid var(--grid);
}

.page-about .about-topics__item:last-child {
  padding-bottom: 4px;
}

.page-about .about-topics__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 6px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-topics__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ice);
}

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

.page-about .about-facts {
  margin-top: 36px;
  border-top: 1px solid var(--grid);
}

.page-about .about-facts__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--grid);
}

@media (min-width: 620px) {
  .page-about .about-facts__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

.page-about .about-facts__key {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-facts__val {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ice);
  word-break: break-word;
}

.page-about .about-facts__val.num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.page-about .about-facts__row--note .about-facts__val {
  color: var(--mist);
  font-size: 14px;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(44px, 7vw, 88px) 0 clamp(52px, 8vw, 96px);
  background:
    linear-gradient(135deg, rgba(155, 123, 255, 0.14) 0%, rgba(6, 19, 32, 0) 58%),
    var(--abyss);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 40px);
  align-items: center;
}

@media (min-width: 860px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 48px;
  }
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--ice);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

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

.page-about .about-cta__actions .btn {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-chart__line {
    stroke-dasharray: none;
    stroke-dashoffset: 0;
  }

  .page-about .about-chart.is-in .about-chart__line {
    animation: none;
  }

  .page-about .about-chart__dot {
    opacity: 1;
    transition: none;
  }

  .page-about .about-stages__item::before {
    transform: scaleX(1);
    transition: none;
  }
}
<<<END>>>