.page-about {
  --about-pad: clamp(48px, 7vw, 88px);
  --about-gap: clamp(20px, 3vw, 40px);
  --about-max-text: 46ch;
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 28px) 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(115% 90% at 84% 6%, rgba(53, 242, 214, 0.11), transparent 62%),
    radial-gradient(80% 70% at 4% 92%, rgba(255, 107, 74, 0.07), transparent 66%),
    linear-gradient(180deg, var(--ink-900) 0%, #07172B 68%, var(--ink-900) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(27, 58, 87, 0.5) 0 1px,
    transparent 1px 32px
  );
  opacity: 0.35;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 26px;
}

.page-about .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

.page-about .crumbs__sep {
  margin: 0 8px;
  color: var(--line);
}

.page-about .about-hero__grid {
  align-items: start;
  gap: var(--about-gap);
}

.page-about .about-hero__text {
  display: flex;
  flex-direction: column;
}

.page-about .eyebrow {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  font-size: clamp(28px, 5.6vw, 50px);
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ice);
  margin: 0 0 18px;
  max-width: 20ch;
}

.page-about .about-hero__lead {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
  max-width: 38ch;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 30px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-fact__label {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
  margin: 0;
}

.page-about .about-fact__num {
  font-family: var(--font-score);
  font-weight: 600;
  font-size: clamp(30px, 6vw, 44px);
  line-height: 0.95;
  color: var(--cyan);
  margin: 0;
}

.page-about .about-fact__unit {
  font-size: 12px;
  color: var(--muted);
  margin: 0;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .media__caption {
  display: block;
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
  background: rgba(11, 31, 54, 0.6);
}

/* ---------- 章节通用 ---------- */
.page-about .section {
  padding-block: var(--about-pad);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-mission {
  border-top: 0;
}

.page-about .section__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .section__index {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--moss);
  transition: color var(--ease);
}

.page-about .section.is-active .section__index {
  color: var(--cyan);
}

.page-about .section__title {
  font-size: clamp(21px, 3.2vw, 31px);
  line-height: 1.3;
  color: var(--ice);
  margin: 0;
  max-width: 24ch;
}

.page-about .section__summary {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
  max-width: var(--about-max-text);
}

.page-about .prose p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ice);
  margin: 0 0 16px;
  max-width: 38ch;
}

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

.page-about .prose a,
.page-about .about-flow__note a,
.page-about .about-squad__hint a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 214, 0.4);
}

.page-about .prose a:hover,
.page-about .about-flow__note a:hover,
.page-about .about-squad__hint a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 01 业务与人群 ---------- */
.page-about .about-mission__body {
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-audience {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-audience .index-row {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line-soft);
  min-height: 52px;
}

.page-about .about-audience .index-row__time {
  font-size: 12px;
  color: var(--moss);
}

.page-about .about-audience .index-row__title {
  font-size: 15px;
  color: var(--ice);
}

.page-about .about-audience .index-row__tag {
  justify-self: end;
}

/* ---------- 02 赛季时间轴 ---------- */
.page-about .season-rail {
  list-style: none;
  margin: 0;
  padding: 22px 0 10px;
  display: flex;
  gap: 0;
  border-top: 1px solid var(--line);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

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

.page-about .season-rail::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-about .season-rail__item {
  position: relative;
  flex: 0 0 clamp(206px, 24vw, 268px);
  padding: 24px 20px 20px 0;
  scroll-snap-align: start;
  border-right: 1px solid var(--line-soft);
}

.page-about .season-rail__item:last-child {
  border-right: 0;
}

.page-about .season-rail__item::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  transform: rotate(45deg);
  background: var(--ink-900);
  border: 1px solid var(--cyan);
  transition: background var(--ease), border-color var(--ease);
}

.page-about .season-rail__item--now::before {
  background: var(--coral);
  border-color: var(--coral);
}

.page-about .season-rail__year {
  display: block;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .season-rail__item--now .season-rail__year {
  color: var(--coral);
}

.page-about .season-rail__title {
  font-size: 16px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--ice);
  margin: 0 0 8px;
}

.page-about .season-rail__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0;
  max-width: 30ch;
}

/* ---------- 03 数据链路 ---------- */
.page-about .about-flow__body {
  gap: var(--about-gap);
  align-items: start;
}

.page-about .flow-steps {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
}

.page-about .flow-step {
  position: relative;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .flow-step__no {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--moss);
  margin-bottom: 8px;
}

.page-about .flow-step__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ice);
  margin: 0 0 8px;
}

.page-about .flow-step__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

.page-about .about-flow__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-flow__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 21 / 9;
  filter: saturate(0.8) brightness(0.92);
}

/* ---------- 04 球队资料 ---------- */
.page-about .about-squad__body {
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-squad__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .about-squad__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 5;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .squad-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-about .squad-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .squad-item__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .squad-item__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

.page-about .about-squad__hint {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 05 团队分工 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
}

.page-about .team-cell {
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-cell__num {
  display: block;
  font-family: var(--font-score);
  font-weight: 600;
  font-size: clamp(38px, 8vw, 56px);
  line-height: 0.92;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .team-cell__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--ice);
  margin: 10px 0 8px;
}

.page-about .team-cell__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
  max-width: 34ch;
}

.page-about .about-team__note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 1px solid var(--coral);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  max-width: var(--about-max-text);
}

/* ---------- 06 合作与认可 ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .partner-col__title {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-about .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .partner-row {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 14px 0 14px 14px;
  border-bottom: 1px solid var(--line-soft);
  border-left: 1px solid var(--line);
  transition: border-left-color var(--ease), background var(--ease);
}

.page-about .partner-row:hover,
.page-about .partner-row:focus-within {
  border-left-color: var(--cyan);
  background: rgba(53, 242, 214, 0.04);
}

.page-about .partner-row__name {
  font-size: 15px;
  font-weight: 500;
  color: var(--ice);
}

.page-about .partner-row__more {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  padding: clamp(36px, 6vw, 64px) 0;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(53, 242, 214, 0.07), transparent 55%),
    var(--ink-800);
}

.page-about .about-cta__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-cta__lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ice);
  margin: 0;
  max-width: 48ch;
}

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

.page-about .about-top-wrap {
  padding: 22px 0 8px;
  text-align: right;
}

.page-about .about-top {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-top:hover,
.page-about .about-top:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .section__head {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 6px 20px;
    align-items: baseline;
  }

  .page-about .section__index {
    grid-row: 1 / span 2;
    padding-top: 4px;
  }

  .page-about .section__title,
  .page-about .section__summary {
    grid-column: 2;
  }

  .page-about .squad-item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

  .page-about .about-cta__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
  }

  .page-about .about-cta__lead {
    max-width: 52ch;
  }
}

@media (min-width: 900px) {
  .page-about .flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .flow-step {
    padding: 20px 18px 20px 18px;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-about .flow-step:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .flow-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 30px;
    right: -3px;
    width: 0;
    height: 0;
    border-left: 5px solid var(--line);
    border-top: 4px solid transparent;
    border-bottom: 4px solid transparent;
  }

  .page-about .team-grid {
    grid-template-columns: 5fr 3fr 3fr;
  }

  .page-about .team-cell {
    padding: 24px 22px;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-about .team-cell:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .partner-grid {
    grid-template-columns: 5fr 4fr;
    gap: 56px;
  }
}

@media (max-width: 640px) {
  .page-about .season-rail__item {
    flex-basis: 78vw;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 18px;
  }

  .page-about .about-audience .index-row {
    grid-template-columns: 28px 1fr;
    row-gap: 6px;
  }

  .page-about .about-audience .index-row__tag {
    grid-column: 2;
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}
```