.page-about {
  --about-gap: clamp(28px, 5vw, 72px);
  --about-panel-line: rgba(123, 92, 255, 0.26);
  --about-cyan-soft: rgba(34, 230, 255, 0.12);
  --about-orange-soft: rgba(255, 138, 42, 0.1);
  background:
    radial-gradient(ellipse at 82% 4%, rgba(123, 92, 255, 0.18), transparent 44%),
    radial-gradient(ellipse at 6% 18%, rgba(34, 230, 255, 0.08), transparent 38%),
    var(--yi-bg);
  color: var(--yi-text);
  overflow-x: clip;
}

.page-about .about-hero {
  padding: clamp(22px, 4vw, 44px) 0 clamp(36px, 6vw, 84px);
  border-bottom: 1px solid var(--yi-line);
  position: relative;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--yi-cyan), var(--yi-violet), transparent);
  opacity: 0.7;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 5vw, 56px);
  align-items: center;
}

.page-about .about-hero__intro {
  min-width: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(32px, 6vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.04em;
  max-width: 12ch;
  color: var(--yi-text);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--yi-muted);
}

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

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 8px 0 0;
  padding: 0;
}

.page-about .about-stat {
  padding: 14px 12px;
  border: 1px solid var(--yi-line);
  border-radius: var(--yi-radius);
  background: linear-gradient(160deg, rgba(26, 16, 51, 0.92), rgba(7, 8, 13, 0.86));
  min-width: 0;
}

.page-about .about-stat dt {
  margin: 0 0 6px;
  font-size: 12px;
  line-height: 1.4;
  color: var(--yi-muted);
  letter-spacing: 0.04em;
}

.page-about .about-stat dd {
  margin: 0;
  font-family: var(--yi-mono);
  font-size: clamp(18px, 4vw, 26px);
  line-height: 1.2;
  color: var(--yi-cyan);
  white-space: nowrap;
}

.page-about .about-hero__visual {
  margin: 0;
  position: relative;
  border-radius: var(--yi-radius-lg);
  overflow: hidden;
  border: 1px solid var(--yi-line);
  background: var(--yi-panel);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
}

.page-about .about-hero__visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(61, 43, 107, 0.26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 43, 107, 0.26) 1px, transparent 1px);
  background-size: 42px 42px;
  pointer-events: none;
  z-index: 1;
  opacity: 0.6;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-hero__visual figcaption {
  position: relative;
  z-index: 2;
  padding: 12px 16px;
  border-top: 1px solid var(--yi-line);
  background: rgba(7, 8, 13, 0.9);
  color: var(--yi-muted);
  font-size: 13px;
  line-height: 1.55;
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  padding-top: clamp(34px, 6vw, 72px);
  padding-bottom: clamp(48px, 8vw, 110px);
}

.page-about .about-index {
  align-self: start;
  border-left: 2px solid var(--yi-line);
  padding-left: 16px;
}

.page-about .about-index__title {
  margin: 0 0 14px;
  font-family: var(--yi-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--yi-violet);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  color: var(--yi-muted);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--yi-ease), border-color 160ms var(--yi-ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--yi-text);
  border-bottom-color: var(--yi-line);
}

.page-about .about-index__num {
  font-family: var(--yi-mono);
  font-size: 11px;
  color: var(--yi-cyan);
  letter-spacing: 0.04em;
}

.page-about .about-index__years {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.page-about .about-index__years a {
  font-family: var(--yi-mono);
  font-size: 12px;
  color: var(--yi-muted);
  text-decoration: none;
  padding: 5px 10px;
  border: 1px solid var(--yi-line);
  border-radius: var(--yi-pill);
  transition: color 160ms var(--yi-ease), border-color 160ms var(--yi-ease);
}

.page-about .about-index__years a:hover,
.page-about .about-index__years a:focus-visible {
  color: var(--yi-cyan);
  border-color: var(--yi-cyan);
}

.page-about .about-body {
  min-width: 0;
  display: grid;
  gap: clamp(44px, 7vw, 96px);
}

.page-about .about-chapter {
  min-width: 0;
  padding-top: clamp(4px, 1vw, 10px);
  border-top: 1px solid var(--yi-line);
}

.page-about .about-chapter__head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-about .about-chapter__head h2 {
  margin: 0;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.03em;
  max-width: 22ch;
}

.page-about .about-chapter__intro {
  margin: 0;
  max-width: 66ch;
  color: var(--yi-muted);
  font-size: 16px;
  line-height: 1.78;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
  display: grid;
  gap: 26px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--yi-cyan), var(--yi-violet), rgba(61, 43, 107, 0.2));
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  gap: 6px;
  scroll-margin-top: 110px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--yi-bg);
  border: 2px solid var(--yi-cyan);
  box-shadow: 0 0 0 4px rgba(34, 230, 255, 0.08);
}

.page-about .timeline__year {
  font-family: var(--yi-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--yi-cyan);
}

.page-about .timeline__content {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border: 1px solid var(--yi-line);
  border-radius: var(--yi-radius);
  background: linear-gradient(150deg, rgba(26, 16, 51, 0.72), rgba(7, 8, 13, 0.5));
}

.page-about .timeline__content h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.45;
}

.page-about .timeline__content p {
  margin: 0;
  color: var(--yi-muted);
  font-size: 15px;
  line-height: 1.72;
}

.page-about .timeline__content .yi-tag {
  justify-self: start;
}

.page-about .about-figure {
  margin: 26px 0 0;
  border: 1px solid var(--yi-line);
  border-radius: var(--yi-radius-lg);
  overflow: hidden;
  background: var(--yi-panel);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure--wide img {
  aspect-ratio: 2 / 1;
}

.page-about .about-figure--tall img {
  aspect-ratio: 5 / 4;
}

.page-about .about-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--yi-line);
  color: var(--yi-muted);
  font-size: 13px;
  line-height: 1.55;
  background: rgba(7, 8, 13, 0.72);
}

.page-about .coverage-board {
  display: grid;
  gap: 18px;
}

.page-about .coverage-map {
  position: relative;
  min-height: 260px;
  border: 1px solid var(--yi-line);
  border-radius: var(--yi-radius-lg);
  background:
    linear-gradient(rgba(61, 43, 107, 0.24) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 43, 107, 0.24) 1px, transparent 1px),
    radial-gradient(circle at 34% 38%, rgba(34, 230, 255, 0.12), transparent 26%),
    radial-gradient(circle at 72% 64%, rgba(123, 92, 255, 0.18), transparent 30%),
    var(--yi-panel);
  background-size: 34px 34px, 34px 34px, auto, auto, auto;
  overflow: hidden;
}

.page-about .coverage-map::after {
  content: "五大赛区 · 12 个次级联赛";
  position: absolute;
  right: 14px;
  bottom: 12px;
  font-family: var(--yi-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--yi-muted);
}

.page-about .coverage-node {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border-radius: var(--yi-pill);
  border: 1px solid var(--about-panel-line);
  background: rgba(26, 16, 51, 0.92);
  font-family: var(--yi-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--yi-text);
  white-space: nowrap;
}

.page-about .coverage-node::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--yi-cyan);
  box-shadow: 0 0 8px rgba(34, 230, 255, 0.8);
}

.page-about .coverage-node--a { left: 8%; top: 22%; }
.page-about .coverage-node--b { left: 56%; top: 16%; }
.page-about .coverage-node--c { left: 32%; top: 50%; }
.page-about .coverage-node--d { left: 66%; top: 52%; }
.page-about .coverage-node--e { left: 12%; top: 72%; }
.page-about .coverage-node--f {
  right: 8%;
  top: 78%;
  border-color: rgba(255, 138, 42, 0.48);
}
.page-about .coverage-node--f::before {
  background: var(--yi-orange);
  box-shadow: 0 0 8px rgba(255, 138, 42, 0.78);
}

.page-about .coverage-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.page-about .coverage-stats > div {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--yi-line);
  border-radius: var(--yi-radius);
  background: rgba(36, 22, 64, 0.42);
}

.page-about .coverage-stats dt {
  margin-bottom: 4px;
  color: var(--yi-muted);
  font-size: 12px;
  line-height: 1.5;
}

.page-about .coverage-stats dd {
  margin: 0;
  font-family: var(--yi-mono);
  font-size: clamp(17px, 3.4vw, 22px);
  color: var(--yi-cyan);
  white-space: nowrap;
}

.page-about .coverage-notes {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .coverage-notes li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 13px 16px;
  border-left: 2px solid var(--yi-violet);
  background: linear-gradient(90deg, rgba(123, 92, 255, 0.12), transparent);
}

.page-about .coverage-notes strong {
  color: var(--yi-text);
  font-size: 15px;
}

.page-about .coverage-notes span {
  color: var(--yi-muted);
  font-size: 14px;
  line-height: 1.7;
}

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

.page-about .team-bar {
  padding: 16px 18px;
  border: 1px solid var(--yi-line);
  border-radius: var(--yi-radius);
  background: linear-gradient(150deg, rgba(26, 16, 51, 0.8), rgba(7, 8, 13, 0.52));
  transition: border-color 180ms var(--yi-ease), transform 180ms var(--yi-ease);
}

.page-about .team-bar:hover,
.page-about .team-bar:focus-within {
  border-color: rgba(34, 230, 255, 0.5);
  transform: translateY(-2px);
}

.page-about .team-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 9px;
}

.page-about .team-bar__name {
  font-size: 16px;
  color: var(--yi-text);
}

.page-about .team-bar__num {
  font-family: var(--yi-mono);
  font-size: 18px;
  color: var(--yi-cyan);
  white-space: nowrap;
}

.page-about .team-bar__track {
  height: 8px;
  border-radius: var(--yi-pill);
  background: rgba(61, 43, 107, 0.46);
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  width: var(--bar);
  height: 100%;
  border-radius: inherit;
  transform-origin: left center;
  animation: about-bar-in 900ms var(--yi-ease) both;
}

.page-about .team-bar__fill--cyan {
  background: linear-gradient(90deg, var(--yi-cyan), var(--yi-violet));
}

.page-about .team-bar__fill--violet {
  background: linear-gradient(90deg, var(--yi-violet), #b79cff);
}

.page-about .team-bar__fill--orange {
  background: linear-gradient(90deg, var(--yi-orange), #ffc37a);
}

.page-about .team-bar__desc {
  margin: 10px 0 0;
  color: var(--yi-muted);
  font-size: 14px;
  line-height: 1.68;
}

@keyframes about-bar-in {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.page-about .cadence-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: cadence;
}

.page-about .cadence-step {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 14px;
  position: relative;
  padding-bottom: 18px;
}

.page-about .cadence-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 18px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--yi-cyan), rgba(61, 43, 107, 0.2));
}

.page-about .cadence-step__dot {
  width: 12px;
  height: 12px;
  margin-top: 4px;
  border-radius: 50%;
  border: 2px solid var(--yi-cyan);
  background: var(--yi-bg);
  box-shadow: 0 0 0 4px var(--about-cyan-soft);
}

.page-about .cadence-step__time {
  margin: 0 0 4px;
  font-family: var(--yi-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--yi-orange);
}

.page-about .cadence-step h3 {
  margin: 0 0 4px;
  font-size: 17px;
  line-height: 1.45;
}

.page-about .cadence-step p {
  margin: 0;
  color: var(--yi-muted);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .cadence-note {
  margin: 10px 0 0;
  padding: 13px 16px;
  border-radius: var(--yi-radius);
  border: 1px dashed var(--about-panel-line);
  background: var(--about-orange-soft);
  color: var(--yi-muted);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
}

.page-about .partner-grid .about-figure {
  margin-top: 0;
}

.page-about .partner-panel {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-about .partner-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.page-about .partner-stats > div {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--yi-line);
  border-radius: var(--yi-radius);
  background: var(--yi-panel);
}

.page-about .partner-stats dt {
  margin-bottom: 4px;
  color: var(--yi-muted);
  font-size: 12px;
  line-height: 1.5;
}

.page-about .partner-stats dd {
  margin: 0;
  font-family: var(--yi-mono);
  font-size: clamp(17px, 3.4vw, 22px);
  color: var(--yi-cyan);
  white-space: nowrap;
}

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

.page-about .partner-scenes li {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-radius: var(--yi-radius-sm);
  background: rgba(36, 22, 64, 0.42);
  border-left: 2px solid var(--yi-cyan);
}

.page-about .partner-scenes strong {
  font-size: 15px;
  color: var(--yi-text);
}

.page-about .partner-scenes span {
  font-size: 14px;
  line-height: 1.66;
  color: var(--yi-muted);
}

.page-about .about-cta {
  margin-top: 28px;
  display: grid;
  gap: 18px;
  padding: clamp(20px, 3.4vw, 30px);
  border: 1px solid var(--yi-line);
  border-radius: var(--yi-radius-lg);
  background:
    radial-gradient(ellipse at 90% 0%, rgba(34, 230, 255, 0.14), transparent 40%),
    linear-gradient(140deg, var(--yi-panel-2), var(--yi-bg-deep));
}

.page-about .about-cta h3 {
  margin: 0 0 8px;
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.3;
}

.page-about .about-cta p {
  margin: 0;
  color: var(--yi-muted);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 720px) {
  .page-about .coverage-board {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: stretch;
  }

  .page-about .coverage-map {
    min-height: 300px;
  }

  .page-about .coverage-stats {
    grid-template-columns: 1fr;
  }

  .page-about .coverage-stats > div {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
  }

  .page-about .coverage-stats dt {
    margin: 0;
  }

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

  .page-about .partner-stats {
    grid-template-columns: 1fr;
  }

  .page-about .partner-stats > div {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
  }

  .page-about .partner-stats dt {
    margin: 0;
  }

  .page-about .coverage-notes li {
    grid-template-columns: 150px 1fr;
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }

  .page-about .about-hero__visual {
    transform: translateY(14px);
  }

  .page-about .about-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 118px;
  }

  .page-about .about-body {
    padding-left: clamp(0px, 2vw, 26px);
  }

  .page-about .timeline {
    padding-left: 30px;
  }

  .page-about .timeline::before {
    left: 7px;
  }

  .page-about .timeline__item::before {
    left: -30px;
    width: 14px;
    height: 14px;
  }

  .page-about .timeline__content {
    padding: 18px 22px;
  }

  .page-about .cadence-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .cadence-step {
    grid-template-columns: 16px 1fr;
    padding-bottom: 0;
  }

  .page-about .cadence-step:not(:last-child)::before {
    display: none;
  }

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

@media (min-width: 1140px) {
  .page-about .about-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 52px;
  }

  .page-about .about-chapter__intro {
    max-width: 72ch;
  }

  .page-about .coverage-map {
    min-height: 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-bar__fill {
    animation: none;
  }

  .page-about .team-bar {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --bar: 1rem;
}