.page-about {
  --about-cut: 20px;
  --about-band: #082F22;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(20px, 4vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding-top: clamp(20px, 3.4vw, 40px);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-about .about-intro__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  grid-template-columns: 1fr;
}

.page-about .about-intro__main .h-display {
  margin: 14px 0 20px;
  max-width: 16ch;
}

.page-about .about-intro__main .lede {
  max-width: 58ch;
}

.page-about .about-intro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border-left: 3px solid var(--yellow);
}

.page-about .about-figure {
  background: var(--panel);
  padding: 20px 18px 22px;
}

.page-about .about-figure__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--fg-mute);
}

.page-about .about-figure__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  text-align: right;
}

.page-about .about-figure__unit {
  font-size: 14px;
  color: var(--fg-dim);
  margin-left: 4px;
}

/* ---------- 章节头 ---------- */
.page-about .about-head {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-head__lede {
  max-width: 60ch;
  margin-top: 12px;
}

/* ---------- 四个职能组 ---------- */
.page-about .team-groups {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
}

.page-about .team-group {
  position: relative;
  background: var(--pitch);
  padding: 26px 22px 28px;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
}

.page-about .team-group:hover {
  background: var(--panel);
  box-shadow: inset 4px 0 0 var(--yellow);
}

.page-about .team-group__no {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--pitch);
  background: var(--yellow);
  display: inline-block;
  padding: 3px 9px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 6px));
}

.page-about .team-group__name {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 900;
  color: var(--fg);
  letter-spacing: .01em;
}

.page-about .team-group__desc {
  margin: 0;
  color: var(--fg-dim);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .team-group__scope {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--fg-mute);
  font-family: var(--font-mono);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding-top: 0;
  transition: max-height var(--dur-slow) var(--ease), opacity var(--dur) var(--ease), padding-top var(--dur) var(--ease);
}

.page-about .team-group:hover .team-group__scope,
.page-about .team-group:focus-within .team-group__scope {
  max-height: 90px;
  opacity: 1;
  padding-top: 14px;
}

.page-about .team-group__scope-key {
  color: var(--cyan);
  margin-right: 8px;
}

/* ---------- 流程条 ---------- */
.page-about .about-flow-band {
  background: var(--about-band);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-top: clamp(40px, 6vw, 76px);
  padding: clamp(36px, 5vw, 62px) 0;
}

.page-about .flow-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
}

.page-about .flow-step {
  display: grid;
  grid-template-columns: 52px 1fr;
  grid-template-rows: auto auto;
  column-gap: 18px;
  background: var(--panel);
  padding: 20px 20px 22px;
  position: relative;
}

.page-about .flow-step__no {
  grid-row: 1 / 3;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  background: var(--yellow);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .flow-step:hover .flow-step__no {
  background: var(--red);
  color: #FFFFFF;
}

.page-about .flow-step__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 900;
  color: var(--fg);
  align-self: end;
}

.page-about .flow-step__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--fg-dim);
}

.page-about .about-flow-media {
  margin: 0;
  background: var(--blue);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

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

.page-about .about-flow-media__cap {
  padding: 14px 18px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fg-dim);
  border-top: 1px solid rgba(241, 245, 242, .12);
}

/* ---------- 规则复核 ---------- */
.page-about .about-rule {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  border-left: 3px solid var(--red);
  padding-left: clamp(20px, 3vw, 36px);
}

.page-about .about-rule__text p {
  margin: 0 0 16px;
  color: var(--fg-dim);
  line-height: 1.8;
  max-width: 62ch;
}

.page-about .about-rule__text .h-section {
  margin: 12px 0 18px;
  max-width: 22ch;
}

.page-about .rule-marks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .rule-mark {
  background: var(--panel);
  padding: 18px 18px 20px;
  border-left: 3px solid var(--line);
}

.page-about .rule-mark p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--fg-dim);
}

/* ---------- 赛季时间轴 ---------- */
.page-about .season-axis {
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 44px);
  padding: 0;
  position: relative;
}

.page-about .season-axis::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: repeating-linear-gradient(180deg, var(--line) 0 8px, transparent 8px 14px);
}

.page-about .season-node {
  position: relative;
  padding-left: 56px;
  margin-bottom: 12px;
}

.page-about .season-node::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 18px;
  width: 18px;
  height: 18px;
  background: var(--pitch);
  border: 3px solid var(--bright);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 50% 100%, 0 70%);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .season-node:hover::before,
.page-about .season-node:focus-within::before {
  background: var(--yellow);
  border-color: var(--yellow);
}

.page-about .season-item {
  background: var(--panel);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
  transition: background var(--dur) var(--ease);
}

.page-about .season-item:hover {
  background: #0F4632;
}

.page-about .season-item__summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  padding: 16px 22px 16px 20px;
}

.page-about .season-item__summary::-webkit-details-marker { display: none; }

.page-about .season-item__summary::after {
  content: "展开";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: .06em;
}

.page-about .season-item[open] .season-item__summary::after {
  content: "收起";
  color: var(--yellow);
}

.page-about .season-item__year {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--yellow);
  min-width: 4.2em;
}

.page-about .season-item__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--fg);
}

.page-about .season-item__body {
  padding: 0 22px 20px 20px;
  border-top: 1px dashed var(--line);
  margin: 0 22px 0 20px;
  padding-left: 0;
  padding-right: 0;
}

.page-about .season-item__body p {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--fg-dim);
  max-width: 62ch;
}

.page-about .about-axis-media {
  margin: 0;
  background: var(--blue);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

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

.page-about .about-axis-media__cap {
  padding: 14px 18px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fg-dim);
  border-top: 1px solid rgba(241, 245, 242, .12);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco-band {
  background: var(--about-band);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-top: clamp(40px, 6vw, 76px);
  padding: clamp(36px, 5vw, 62px) 0;
}

.page-about .about-eco {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-eco__text p {
  color: var(--fg-dim);
  line-height: 1.8;
  margin: 0 0 16px;
  max-width: 60ch;
}

.page-about .about-eco__text .h-section {
  margin: 12px 0 18px;
}

.page-about .about-eco__text .btn {
  margin-top: 10px;
}

.page-about .about-eco__media {
  margin: 0;
  background: var(--blue);
  clip-path: polygon(0 22px, 22px 0, 100% 0, 100% 100%, 0 100%);
}

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

.page-about .about-eco__media-cap {
  padding: 14px 18px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fg-dim);
  border-top: 1px solid rgba(241, 245, 242, .12);
}

/* ---------- 三条坚持 ---------- */
.page-about .about-values {
  list-style: none;
  margin: 0 0 clamp(34px, 5vw, 56px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-value {
  border-top: 3px solid var(--line);
  padding-top: 20px;
}

.page-about .about-value:nth-child(1) { border-top-color: var(--yellow); }
.page-about .about-value:nth-child(2) { border-top-color: var(--cyan); }
.page-about .about-value:nth-child(3) { border-top-color: var(--red); }

.page-about .about-value__no {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--fg-mute);
}

.page-about .about-value__name {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 900;
  color: var(--fg);
  line-height: 1.5;
}

.page-about .about-value p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-dim);
}

/* ---------- 结尾 CTA ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
  background: var(--blue);
  padding: clamp(26px, 4vw, 40px) clamp(22px, 3.5vw, 44px);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 0 100%);
  border-left: 4px solid var(--red);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 900;
  color: var(--fg);
}

.page-about .about-cta__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-dim);
  max-width: 52ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 960px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

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

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

  .page-about .flow-steps {
    grid-template-columns: 1fr;
  }

  .page-about .about-rule {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

@media (min-width: 1180px) {
  .page-about .team-groups {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
</PAGE_CSS>>>