.page-about {
  --about-line: #2A2E3D;
  --about-shadow: #05060A;
  color: var(--txt);
}

/* ============ 面包屑上下文 ============ */
.page-about .breadcrumb {
  padding-block: 20px 4px;
}

/* ============ 通用小节头部 ============ */
.page-about .about-head {
  max-width: 68ch;
  margin-bottom: 32px;
}

.page-about .about-head__title {
  margin: 10px 0 14px;
  font-size: clamp(26px, 4.6vw, 32px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--txt);
}

.page-about .about-head__lede {
  margin: 0;
  color: var(--txt-dim);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-head__note {
  margin: 0;
  color: var(--txt-dim);
  font-size: 15px;
  line-height: 1.75;
  max-width: 42ch;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  padding-block: 24px 56px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
}

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

.page-about .about-hero__title {
  margin: 14px 0 18px;
  font-size: clamp(30px, 7.4vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 900;
  color: var(--txt);
}

.page-about .about-hero__lede {
  color: var(--txt-dim);
  max-width: 60ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  padding: 20px 20px 8px;
  background: var(--ink-2);
  border: var(--bw) solid var(--about-line);
  box-shadow: 8px 10px 0 0 var(--violet);
}

.page-about .about-hero__panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: var(--bw) solid var(--about-line);
  margin-bottom: 6px;
}

.page-about .about-hero__panel-code {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .about-hero__facts {
  margin: 0;
}

.page-about .about-hero__panel .data-row {
  border-bottom: 1px dashed rgba(162, 168, 188, 0.22);
}

.page-about .about-hero__panel .data-row:last-child {
  border-bottom: 0;
}

/* ============ 时间轴 ============ */
.page-about .about-history {
  padding-block: 56px;
  border-top: var(--bw) solid var(--about-line);
}

.page-about .about-history__visual {
  margin: 0 0 44px;
}

.page-about .about-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-rail::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--violet) 0%, var(--cyan) 55%, var(--about-line) 100%);
}

.page-about .about-rail__node {
  position: relative;
  padding: 0 0 34px 40px;
  min-width: 0;
}

.page-about .about-rail__node:last-child {
  padding-bottom: 0;
}

.page-about .about-rail__dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 3px solid var(--about-line);
  background: var(--ink);
  z-index: 1;
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-rail__node:hover .about-rail__dot {
  border-color: var(--cyan);
  background: var(--cyan);
}

.page-about .about-rail__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.page-about .about-rail__year {
  color: var(--cyan);
  font-size: 14px;
  letter-spacing: 0.06em;
}

.page-about .about-rail__title {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--txt);
}

.page-about .about-rail__body p {
  margin: 0;
  color: var(--txt-dim);
  font-size: 15px;
  line-height: 1.75;
  max-width: 62ch;
}

/* ============ 赛区网格 ============ */
.page-about .about-regions {
  padding-block: 56px;
  border-top: var(--bw) solid var(--about-line);
}

.page-about .about-regions__visual {
  margin: 0 0 36px;
}

.page-about .about-region-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-region {
  position: relative;
  min-width: 0;
  padding: 20px 20px 22px;
  background: var(--ink-2);
  border: var(--bw) solid var(--about-line);
  box-shadow: 6px 8px 0 0 var(--about-shadow);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease),
    border-color 180ms var(--ease);
}

.page-about .about-region:hover {
  transform: translateY(-2px);
  border-color: var(--violet-soft);
  box-shadow: 8px 10px 0 0 var(--violet);
}

.page-about .about-region--wide {
  border-width: 3px;
}

.page-about .about-region__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .about-region__code {
  color: var(--violet-soft);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-region__name {
  margin: 0 0 6px;
  font-size: 21px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--txt);
}

.page-about .about-region__cities {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  word-break: break-word;
}

.page-about .about-region__desc {
  margin: 0 0 14px;
  color: var(--txt-dim);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-region__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ============ 合作生态 ============ */
.page-about .about-eco {
  padding-block: 56px;
  border-top: var(--bw) solid var(--about-line);
}

.page-about .about-eco__grid {
  display: grid;
  gap: 34px;
}

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

.page-about .about-ring {
  display: block;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  overflow: visible;
}

.page-about .about-ring circle {
  transition: stroke 180ms var(--ease), stroke-width 180ms var(--ease),
    transform 180ms var(--ease);
  transform-origin: 170px 170px;
  cursor: pointer;
}

.page-about .about-ring__inner {
  stroke: var(--magenta);
}

.page-about .about-ring__mid {
  stroke: var(--violet);
}

.page-about .about-ring__outer {
  stroke: var(--about-line);
}

.page-about .about-ring__core {
  fill: var(--cyan);
}

.page-about .about-ring circle:hover {
  stroke: var(--cyan);
  stroke-width: 16;
}

.page-about .about-eco__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 20px 0 0;
  font-size: 12px;
  color: var(--txt-dim);
  letter-spacing: 0.04em;
}

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

.page-about .about-eco__lede {
  margin: 12px 0 26px;
  color: var(--txt-dim);
  font-size: 16px;
  line-height: 1.75;
  max-width: 56ch;
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--bw) solid var(--about-line);
}

.page-about .about-eco__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px dashed rgba(162, 168, 188, 0.24);
}

.page-about .about-eco__item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  color: var(--txt);
  letter-spacing: -0.01em;
}

.page-about .about-eco__item p {
  margin: 0;
  color: var(--txt-dim);
  font-size: 14px;
  line-height: 1.72;
}

.page-about .about-eco__idx {
  color: var(--yellow);
  font-size: 13px;
  padding-top: 3px;
}

/* ============ 能力数据 ============ */
.page-about .about-capacity {
  padding-block: 56px;
  border-top: var(--bw) solid var(--about-line);
}

.page-about .about-stat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  background: var(--about-line);
  border: var(--bw) solid var(--about-line);
}

.page-about .about-stat {
  padding: 22px 20px 24px;
  background:
    linear-gradient(135deg, rgba(108, 77, 246, 0.14), transparent 62%),
    var(--ink-2);
  min-width: 0;
}

.page-about .about-stat__num {
  display: block;
  font-size: clamp(28px, 6vw, 38px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
  line-height: 1.1;
}

.page-about .about-stat__lab {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--txt);
}

.page-about .about-stat__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--txt-dim);
}

/* ============ 团队 ============ */
.page-about .about-team {
  padding-block: 56px;
  border-top: var(--bw) solid var(--about-line);
}

.page-about .about-team__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-team__figure {
  margin: 0;
}

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

.page-about .about-team__lede {
  margin: 12px 0 26px;
  color: var(--txt-dim);
  font-size: 16px;
  line-height: 1.75;
  max-width: 56ch;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-team__item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 16px 18px;
  background: var(--ink-2);
  border-left: 3px solid var(--violet);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-team__item:hover {
  border-left-color: var(--magenta);
  background: #181B26;
}

.page-about .about-team__item h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--txt);
}

.page-about .about-team__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--txt-dim);
}

.page-about .about-team__no {
  color: var(--magenta);
  font-size: 13px;
  padding-top: 2px;
}

/* ============ 数据与合规 ============ */
.page-about .about-trust {
  padding-block: 56px;
  border-top: var(--bw) solid var(--about-line);
}

.page-about .about-trust__panel {
  padding: 28px 24px 26px;
  background: var(--paper);
  color: var(--ink);
  border: var(--bw) solid var(--ink);
  box-shadow: 8px 10px 0 0 var(--yellow);
}

.page-about .about-trust__eyebrow {
  color: var(--violet);
}

.page-about .about-trust__title {
  margin: 10px 0 22px;
  font-size: clamp(24px, 4.4vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-trust__cols {
  display: grid;
  gap: 22px;
}

.page-about .about-trust__col h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--ink);
  padding-left: 10px;
  border-left: 4px solid var(--violet);
}

.page-about .about-trust__col p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: #33364A;
}

.page-about .about-trust__link {
  margin: 24px 0 0;
}

.page-about .about-link {
  display: inline-block;
  color: var(--violet);
  font-weight: 600;
  text-decoration: none;
  padding-bottom: 2px;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 2px;
  background-repeat: no-repeat;
  background-position: left bottom;
  transition: background-size 180ms var(--ease);
}

.page-about .about-link:hover {
  background-size: 100% 2px;
}

/* ============ 收尾 CTA ============ */
.page-about .about-cta {
  padding-block: 56px 72px;
  border-top: var(--bw) solid var(--about-line);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
  padding: 30px 24px 32px;
  background:
    linear-gradient(115deg, rgba(255, 45, 155, 0.16), transparent 58%),
    var(--ink-2);
  border: var(--bw) solid var(--about-line);
  box-shadow: 8px 10px 0 0 var(--cyan);
}

.page-about .about-cta__title {
  margin: 10px 0 12px;
  font-size: clamp(22px, 4.4vw, 30px);
  line-height: 1.26;
  letter-spacing: -0.02em;
  color: var(--txt);
}

.page-about .about-cta__lede {
  margin: 0;
  color: var(--txt-dim);
  font-size: 15px;
  line-height: 1.75;
  max-width: 52ch;
}

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

/* ============ 平板 ============ */
@media (min-width: 640px) {
  .page-about .about-region-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

/* ============ 桌面 ============ */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding-block: 36px 80px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-hero__lede {
    font-size: 17px;
  }

  .page-about .about-head--split {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: end;
    max-width: none;
  }

  .page-about .about-head--split .about-head__note {
    padding-bottom: 4px;
  }

  .page-about .about-rail__node {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 28px;
    padding-left: 48px;
  }

  .page-about .about-rail__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 0;
    padding-top: 2px;
  }

  .page-about .about-rail::before {
    left: 9px;
  }

  .page-about .about-rail__dot {
    width: 20px;
    height: 20px;
  }

  .page-about .about-region-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-region:nth-child(1) { grid-column: span 7; }
  .page-about .about-region:nth-child(2) { grid-column: span 5; }
  .page-about .about-region:nth-child(3) { grid-column: span 4; }
  .page-about .about-region:nth-child(4) { grid-column: span 8; }
  .page-about .about-region:nth-child(5) { grid-column: span 5; }
  .page-about .about-region:nth-child(6) { grid-column: span 7; }
  .page-about .about-region:nth-child(7) { grid-column: span 6; }
  .page-about .about-region:nth-child(8) { grid-column: span 6; }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-ring {
    max-width: 340px;
  }

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

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
    padding: 40px 36px;
  }

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

@media (min-width: 1200px) {
  .page-about .about-hero__grid {
    gap: 72px;
  }
}
<<<END>>>