.page-about {
  --about-rail-w: 236px;
  --about-cut: rgba(111, 143, 133, .22);
  background: var(--c-night);
  color: var(--c-white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 44px) 0 56px;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(198, 255, 61, .10), transparent 58%),
    linear-gradient(180deg, #0B1F17 0%, #0B1F17 62%, #0E241B 100%);
}

.page-about .about-hero-inner {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-hero-copy .eyebrow {
  margin-bottom: 18px;
}

.page-about .display-1 {
  margin: 0 0 22px;
  letter-spacing: -.01em;
}

.page-about .about-hero .lede {
  max-width: 46ch;
  margin: 0 0 30px;
  color: var(--c-mist);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 38px;
}

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-fact-label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-about .about-fact-value {
  margin: 0;
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1;
  color: var(--c-lime);
}

.page-about .about-hero-media {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 40px 90px -50px rgba(0, 0, 0, .9);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero-tag {
  position: absolute;
  left: 18px;
  bottom: 18px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  background: rgba(11, 31, 23, .78);
  border: 1px solid var(--line-strong);
  color: var(--c-lime);
  font-size: 11px;
  letter-spacing: .14em;
}

/* ---------- 主体分栏 ---------- */
.page-about .about-body-wrap {
  padding-top: 8px;
}

.page-about .about-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-rail-label {
  margin: 0 0 14px;
  color: var(--c-mist);
}

.page-about .about-rail-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: thin;
}

.page-about .about-rail-nav::-webkit-scrollbar {
  height: 4px;
}

.page-about .about-rail-nav::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: var(--radius-pill);
}

.page-about .about-rail .rail-link {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  white-space: nowrap;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  color: var(--c-mist);
  text-decoration: none;
  font-size: 14px;
  transition: color .22s var(--ease), background-color .22s var(--ease), border-color .22s var(--ease);
}

.page-about .about-rail-idx {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-steel);
  transition: color .22s var(--ease);
}

.page-about .about-rail .rail-link:hover {
  color: var(--c-white);
  border-color: var(--line);
}

.page-about .about-rail .rail-link.is-active {
  color: var(--c-lime);
  background: var(--c-lime-soft);
  border-color: rgba(198, 255, 61, .32);
}

.page-about .about-rail .rail-link.is-active .about-rail-idx {
  color: var(--c-lime);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding-top: 52px;
}

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

.page-about .about-section-head {
  max-width: 62ch;
  margin-bottom: 36px;
}

.page-about .about-section-head .eyebrow {
  margin: 0 0 14px;
  color: var(--c-lime);
}

.page-about .about-section-head .display-2 {
  margin: 0 0 16px;
}

.page-about .about-section-lede {
  margin: 0;
  color: var(--c-mist);
  font-size: 17px;
  line-height: 1.85;
}

.page-about .about-curve {
  display: block;
  width: 100%;
  height: 60px;
  margin: 8px 0 -6px;
  color: var(--about-cut);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-stage {
  position: relative;
  padding: 0 0 40px 36px;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 16px;
  bottom: -6px;
  width: 2px;
  background: var(--line);
}

.page-about .about-stage:last-child::before {
  display: none;
}

.page-about .about-stage::after {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-night);
  border: 2px solid var(--c-steel);
  transition: border-color .22s var(--ease);
}

.page-about .about-stage--now::after {
  border-color: var(--c-lime);
  box-shadow: 0 0 0 5px var(--c-lime-soft);
}

.page-about .about-stage-mark {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-steel);
}

.page-about .about-stage--now .about-stage-mark {
  color: var(--c-lime);
}

.page-about .about-stage-title {
  margin: 0 0 10px;
  font-size: clamp(18px, 3.4vw, 22px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-white);
}

.page-about .about-stage p {
  margin: 0;
  max-width: 62ch;
  color: var(--c-mist);
  line-height: 1.85;
}

/* ---------- 内容体系折叠卡 ---------- */
.page-about .about-modules {
  display: grid;
  gap: 14px;
}

.page-about .about-module {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, #123328 0%, #0F2A21 100%);
  overflow: hidden;
  transition: border-color .24s var(--ease);
}

.page-about .about-module[open] {
  border-color: rgba(198, 255, 61, .3);
}

.page-about .about-module-sum {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-module-sum::-webkit-details-marker {
  display: none;
}

.page-about .about-module-sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--c-lime);
  transition: transform .24s var(--ease);
}

.page-about .about-module[open] .about-module-sum::after {
  transform: rotate(45deg);
}

.page-about .about-module-idx {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-steel);
}

.page-about .about-module-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-white);
}

.page-about .about-module-body {
  padding: 0 20px 20px;
}

.page-about .about-module-body p {
  margin: 0 0 12px;
  color: var(--c-mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-module-use {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  color: var(--c-white) !important;
  font-size: 14px !important;
}

.page-about .about-module-use .label {
  color: var(--c-lime);
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: 30px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--c-charcoal);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  padding: 16px 20px 18px;
  color: var(--c-mist);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- 编辑与校验 ---------- */
.page-about .about-workflow {
  display: grid;
  gap: 26px;
}

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

.page-about .about-flow-node {
  position: relative;
  padding: 20px 22px 20px 60px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--c-charcoal);
}

.page-about .about-flow-node::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(198, 255, 61, .5), rgba(111, 143, 133, .12));
}

.page-about .about-flow-idx {
  position: absolute;
  left: 16px;
  top: 20px;
  font-size: 12px;
  color: var(--c-lime);
}

.page-about .about-flow-node h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--c-white);
}

.page-about .about-flow-node p {
  margin: 0;
  color: var(--c-mist);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-workflow-aside {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--c-charcoal);
}

.page-about .about-workflow-aside img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-workflow-note {
  padding: 20px 22px 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-workflow-time {
  margin: 0 0 8px;
  font-size: 30px;
  line-height: 1;
  color: var(--c-lime);
}

.page-about .about-workflow-note p:last-child {
  margin: 0;
  color: var(--c-mist);
  font-size: 14px;
  line-height: 1.8;
}

.page-about .about-honors {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 26px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-about .about-honors-note {
  flex: 1 1 280px;
  margin: 0;
  color: var(--c-mist);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 联赛覆盖 ---------- */
.page-about .about-leagues {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-league {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--c-charcoal);
  transition: border-color .24s var(--ease), background-color .24s var(--ease);
}

.page-about .about-league:hover,
.page-about .about-league:focus-within {
  border-color: rgba(198, 255, 61, .34);
  background: #14211C;
}

.page-about .about-league-name {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 4px;
}

.page-about .about-league-note {
  display: block;
  color: var(--c-mist);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-coverage-foot {
  margin: 24px 0 0;
  color: var(--c-mist);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 账户服务 ---------- */
.page-about .about-account {
  display: grid;
  gap: 26px;
}

.page-about .about-account-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-account-list li {
  padding-left: 18px;
  border-left: 2px solid rgba(198, 255, 61, .35);
}

.page-about .about-account-list h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--c-white);
}

.page-about .about-account-list p {
  margin: 0;
  color: var(--c-mist);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-support {
  padding: 26px 24px 24px;
  border-radius: var(--radius-lg);
}

.page-about .about-support-list {
  margin: 14px 0 0;
  display: grid;
  gap: 14px;
}

.page-about .about-support-list dt {
  margin-bottom: 4px;
}

.page-about .about-support-list dd {
  margin: 0;
  font-size: 15px;
  word-break: break-all;
  color: var(--c-white);
}

.page-about .about-support-note {
  margin: 18px 0 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--c-mist);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 合规 ---------- */
.page-about .about-section--last {
  padding-bottom: 72px;
}

.page-about .about-compliance {
  display: grid;
  gap: 24px;
}

.page-about .about-compliance-main p {
  margin: 0 0 14px;
  color: var(--c-mist);
  font-size: 16px;
  line-height: 1.9;
}

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

.page-about .about-compliance-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-compliance-facts li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: var(--c-glass);
}

.page-about .about-compliance-facts .label {
  color: var(--c-mist);
}

.page-about .about-compliance-value {
  font-size: 15px;
  color: var(--c-lime);
}

.page-about .about-cta-line {
  margin: 34px 0 0;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  color: var(--c-mist);
  font-size: 15px;
  line-height: 1.9;
}

.page-about a {
  color: var(--c-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, .35);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about a:hover {
  border-bottom-color: var(--c-lime);
}

.page-about .btn {
  border-bottom: none;
}

.page-about .btn--primary {
  color: #0B1F17;
}

.page-about .btn--ghost {
  color: var(--c-white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 64px) 0 72px;
  }

  .page-about .about-modules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

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

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

  .page-about .about-compliance {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 80px) 0 88px;
  }

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 64px;
  }

  .page-about .about-grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 64px;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .about-rail-nav {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    position: relative;
    padding-left: 20px;
    gap: 4px;
  }

  .page-about .about-rail-nav::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--c-lime), rgba(111, 143, 133, .18));
  }

  .page-about .about-rail .rail-link {
    flex: 1 1 auto;
    white-space: normal;
    padding: 10px 16px;
  }

  .page-about .about-section {
    padding-top: 68px;
  }

  .page-about .about-section--last {
    padding-bottom: 96px;
  }

  .page-about .about-workflow {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 32px;
    align-items: start;
  }

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

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

  .page-about .about-leagues {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-league-note {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .3s var(--ease), opacity .3s var(--ease), margin-top .3s var(--ease);
  }

  .page-about .about-league:hover .about-league-note,
  .page-about .about-league:focus-within .about-league-note {
    max-height: 90px;
    opacity: 1;
    margin-top: 6px;
  }

  .page-about .about-figure {
    margin-top: 40px;
  }
}

@media (min-width: 1320px) {
  .page-about .about-leagues {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
</final_thought>