.page-about {
  --about-rail-w: 156px;
  --about-rail-gap: 40px;
  display: block;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 26px 0 6px;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -90px;
  right: -70px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle at center, rgba(46, 230, 200, .16), rgba(46, 230, 200, 0) 70%);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0 18%, var(--steel) 18% 100%);
  opacity: .7;
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}
.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(29px, 7.6vw, 56px);
  line-height: 1.08;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--snow);
  overflow-wrap: break-word;
}
.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--steel);
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  margin: 0;
  overflow: hidden;
}
.page-about .about-fact {
  background: var(--navy);
  padding: 13px 14px 15px;
}
.page-about .about-fact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
}
.page-about .about-fact dd {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 6px 0 0;
  color: var(--snow);
}
.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}
.page-about .about-fact__unit {
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 34px;
}
.page-about .about-stream {
  min-width: 0;
}

/* ---------- 赛季刻度栏 ---------- */
.page-about .season-rail {
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  background: var(--navy);
  padding: 13px 13px 15px;
}
.page-about .season-rail__title {
  margin: 0 0 11px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--gold);
}
.page-about .season-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .season-rail__item {
  display: flex;
  align-items: center;
  gap: 5px;
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  padding: 3px 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
  white-space: nowrap;
}
.page-about .season-rail__item.is-current {
  border-color: rgba(46, 230, 200, .6);
  color: var(--cyan);
}
.page-about .season-rail__num {
  color: inherit;
  letter-spacing: .06em;
}
.page-about .season-rail__label {
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 11px;
}
.page-about .season-rail__item.is-current .season-rail__label {
  color: var(--snow);
}
.page-about .season-rail__foot {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--steel);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 24px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
  border-left: 2px solid var(--steel);
}
.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 10px;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 20px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--steel);
  border-radius: 1px;
}
.page-about .about-timeline__item:has(.about-node[open])::before {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(46, 230, 200, .14);
}
.page-about .about-node {
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  background: var(--navy);
  overflow: hidden;
}
.page-about .about-node[open] {
  border-color: rgba(46, 230, 200, .5);
}
.page-about .about-node__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 18px;
  align-items: center;
  gap: 10px;
  padding: 13px 14px;
  cursor: pointer;
  list-style: none;
}
.page-about .about-node__head::-webkit-details-marker {
  display: none;
}
.page-about .about-node__head:hover {
  background: rgba(46, 230, 200, .05);
}
.page-about .about-node__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}
.page-about .about-node__stage {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink);
  background: var(--gold);
  border-radius: 2px;
  padding: 3px 6px;
  white-space: nowrap;
}
.page-about .about-node__title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--snow);
}
.page-about .about-node__mark {
  position: relative;
  width: 14px;
  height: 14px;
  justify-self: end;
}
.page-about .about-node__mark::before,
.page-about .about-node__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
}
.page-about .about-node__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}
.page-about .about-node__mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
  transition: transform 200ms ease;
}
.page-about .about-node[open] .about-node__mark::after {
  transform: scaleY(0);
}
.page-about .about-node__body {
  padding: 0 14px 15px;
  border-top: 1px solid var(--steel);
}
.page-about .about-node__body p {
  margin: 13px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 图片组件 ---------- */
.page-about .about-figure {
  margin: 0;
}
.page-about .about-figure--banner {
  margin-top: 26px;
}
.page-about .about-figure--wide {
  margin-top: 28px;
}
.page-about .about-figure__frame {
  position: relative;
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  background: var(--ink);
  overflow: hidden;
}
.page-about .about-figure__frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.88) contrast(1.06);
}
.page-about .about-figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg, rgba(5, 8, 15, .24) 0 1px, rgba(5, 8, 15, 0) 1px 4px);
  opacity: .55;
  pointer-events: none;
}
.page-about .about-figure__tag {
  position: absolute;
  left: 10px;
  bottom: 10px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--paper-ink);
  background: var(--gold);
  border-radius: 2px;
  padding: 4px 8px;
}
.page-about .about-figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 档案体系 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 22px;
}
.page-about .about-split__text > p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-checklist {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--steel);
}
.page-about .about-checklist__item {
  padding: 16px 0;
  border-bottom: 1px solid var(--steel);
}
.page-about .about-checklist__item h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--snow);
}
.page-about .about-checklist__item h3::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 9px;
  background: var(--cyan);
  vertical-align: 2px;
}
.page-about .about-checklist__item p {
  margin: 8px 0 0 17px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 赛事板块 ---------- */
.page-about .league-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .league-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 18px;
  background: var(--navy);
  border: 2px solid var(--steel);
  border-radius: var(--radius);
}
.page-about .league-card::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 38px;
  height: 5px;
  background: var(--cyan);
}
.page-about .league-card:nth-child(3n + 2)::before {
  background: var(--gold);
}
.page-about .league-card:nth-child(3n)::before {
  background: var(--flame);
}
.page-about .league-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--mist);
}
.page-about .league-card__title {
  margin: 0;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--snow);
}
.page-about .league-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}
.page-about .league-card__meta {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--steel);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
}

/* ---------- 生产流程 ---------- */
.page-about .flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .flow__step {
  position: relative;
  padding: 20px 18px 22px;
  background: linear-gradient(180deg, rgba(20, 38, 58, .9), rgba(11, 18, 32, .9));
  border: 2px solid var(--steel);
  border-radius: var(--radius);
}
.page-about .flow__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--flame);
  border: 1px solid rgba(255, 90, 43, .5);
  border-radius: 2px;
  padding: 2px 6px;
}
.page-about .flow__title {
  margin: 12px 0 0;
  font-size: 20px;
  font-weight: 900;
  color: var(--snow);
}
.page-about .flow__text {
  margin: 9px 0 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .team-strip {
  margin-top: 22px;
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  background: var(--navy);
  overflow: hidden;
}
.page-about .team-strip__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 18px 16px;
  border-bottom: 2px solid var(--steel);
  background: repeating-linear-gradient(90deg, rgba(46, 230, 200, .07) 0 1px, rgba(46, 230, 200, 0) 1px 34px);
}
.page-about .team-strip__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--mist);
}
.page-about .team-strip__num {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--gold);
}
.page-about .team-strip__num span {
  font-size: 14px;
  color: var(--mist);
}
.page-about .team-strip__list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .team-unit {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--steel);
}
.page-about .team-unit:last-child {
  border-bottom: 0;
}
.page-about .team-unit__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}
.page-about .team-unit__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--snow);
}
.page-about .team-unit__bar {
  grid-column: 1 / -1;
  display: block;
  height: 6px;
  background: var(--steel);
  border-radius: 1px;
  overflow: hidden;
}
.page-about .team-unit__fill {
  display: block;
  height: 100%;
  border-radius: 1px;
}
.page-about .team-unit__fill--cyan {
  background: var(--cyan);
}
.page-about .team-unit__fill--gold {
  background: var(--gold);
}
.page-about .team-unit__fill--flame {
  background: var(--flame);
}
.page-about .team-unit__desc {
  grid-column: 1 / -1;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 协作生态 ---------- */
.page-about .coop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .coop-card {
  padding: 20px 18px;
  border: 2px solid var(--steel);
  border-left-width: 5px;
  border-radius: var(--radius);
  background: var(--navy);
}
.page-about .coop-card:nth-child(1) {
  border-left-color: var(--cyan);
}
.page-about .coop-card:nth-child(2) {
  border-left-color: var(--gold);
}
.page-about .coop-card:nth-child(3) {
  border-left-color: var(--barley);
}
.page-about .coop-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--snow);
}
.page-about .coop-card__label {
  margin: 8px 0 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--cyan);
}
.page-about .coop-card:nth-child(2) .coop-card__label {
  color: var(--gold);
}
.page-about .coop-card:nth-child(3) .coop-card__label {
  color: var(--barley);
}
.page-about .coop-card__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}
.page-about .coop-note {
  margin: 20px 0 0;
  padding: 16px 18px;
  border: 2px dashed var(--steel);
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.75;
  color: var(--snow);
}
.page-about .coop-note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 长期运营 ---------- */
.page-about .ops-panel {
  margin-top: 22px;
  padding: 22px 20px 20px;
  border-radius: var(--radius);
}
.page-about .ops-panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 2px solid rgba(42, 33, 24, .35);
}
.page-about .ops-panel__stamp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: #5b4a35;
}
.page-about .ops-panel__version {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: #2a2118;
}
.page-about .ops-panel__list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ops-panel__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(42, 33, 24, .22);
}
.page-about .ops-panel__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: #7a6446;
}
.page-about .ops-panel__v {
  font-size: 15px;
  line-height: 1.7;
  color: #2a2118;
}
.page-about .ops-panel__foot {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: #4a3b28;
}

/* ---------- 尾部行动区 ---------- */
.page-about .about-cta {
  margin-top: 34px;
  padding: 26px 20px 28px;
  border: 2px solid var(--steel);
  border-top: 4px solid var(--flame);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(255, 90, 43, .1), rgba(11, 18, 32, .4) 55%);
}
.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(22px, 5vw, 32px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--snow);
}
.page-about .about-cta__text {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 640px) {
  .page-about .league-grid,
  .page-about .coop-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ops-panel__item {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
  .page-about .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .flow__step::after {
    content: "";
    position: absolute;
    top: 27px;
    right: -16px;
    width: 16px;
    height: 2px;
    background: var(--steel);
  }
  .page-about .flow__step:last-child::after {
    display: none;
  }
  .page-about .about-figure--banner .about-figure__frame img {
    max-height: 420px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 40px 0 12px;
  }
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 52px;
    align-items: end;
  }
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 38px;
    align-items: start;
  }
  .page-about .about-figure--wide .about-figure__frame img {
    max-height: 380px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-rail-gap);
    padding-top: 52px;
  }
  .page-about .season-rail {
    position: sticky;
    top: 92px;
    align-self: start;
  }
  .page-about .season-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }
  .page-about .season-rail__item {
    border: 0;
    border-left: 2px solid var(--steel);
    border-radius: 0;
    padding: 6px 0 6px 11px;
    position: relative;
  }
  .page-about .season-rail__item.is-current {
    border-left-color: var(--cyan);
    color: var(--cyan);
  }
  .page-about .season-rail__item.is-current::before {
    content: "";
    position: absolute;
    left: -2px;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 5px;
    background: var(--cyan);
  }
  .page-about .league-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .team-unit {
    grid-template-columns: 60px minmax(0, 1fr);
    align-items: baseline;
  }
  .page-about .team-unit__bar {
    grid-column: 2;
  }
  .page-about .team-unit__desc {
    grid-column: 2;
  }
}

@media (min-width: 1180px) {
  .page-about .about-node__title {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__mark::after {
    transition: none;
  }
}
<<<END>>>