.page-about {
  display: block;
  background: var(--c-void);
  color: var(--c-text);
  font-family: var(--font-body);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
}

.page-about p {
  margin: 0;
}

.page-about [data-accent="cyan"] { --accent: var(--c-cyan); --band: var(--c-cyan); }
.page-about [data-accent="gold"] { --accent: var(--c-gold); --band: var(--c-gold); }
.page-about [data-accent="violet"] { --accent: var(--c-violet); --band: var(--c-violet); }
.page-about [data-accent="pink"] { --accent: var(--c-pink); --band: var(--c-pink); }

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 7vw, 84px) 0 clamp(44px, 7vw, 80px);
  border-bottom: 1px solid var(--c-line);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(53, 230, 210, 0.11), transparent 62%),
    var(--c-void);
}

.page-about .about-intro::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--c-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--c-line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.32;
  pointer-events: none;
}

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

.page-about .about-intro__label {
  margin: clamp(20px, 4vw, 36px) 0 0;
  color: var(--c-cyan);
}

.page-about .about-intro__title {
  margin: 14px 0 0;
  max-width: 20ch;
  font-weight: 300;
  font-size: clamp(2.05rem, 7.4vw, 4.6rem);
  line-height: 1.03;
  letter-spacing: -0.03em;
}

.page-about .about-intro__lede {
  margin-top: clamp(18px, 3vw, 26px);
  max-width: 62ch;
  font-size: clamp(1rem, 2.3vw, 1.125rem);
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .about-facts {
  margin: clamp(30px, 5vw, 52px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-about .about-facts__cell {
  background: var(--c-void);
  padding: 16px 14px 18px;
}

.page-about .about-facts__num {
  font-family: var(--font-data);
  font-size: clamp(1.35rem, 4.6vw, 2rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

.page-about .about-facts__label {
  margin: 8px 0 0;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  line-height: 1.5;
  color: var(--c-muted);
}

@media (min-width: 760px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-facts__cell {
    padding: 22px 20px 24px;
  }
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding: clamp(48px, 7vw, 88px) 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about .section-title {
  margin: 0;
}

.page-about .section-title__idx {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
  margin-right: 12px;
}

.page-about .about-section__lede {
  margin-top: 16px;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .about-section__foot {
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .prose-grid {
  margin-top: clamp(24px, 4vw, 36px);
  display: grid;
  gap: 20px;
}

.page-about .prose-grid p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-text);
  max-width: 60ch;
}

@media (min-width: 880px) {
  .page-about .prose-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 48px;
  }
  .page-about .prose-grid p {
    font-size: 1.0625rem;
  }
}

/* ---------- 四条入口 ---------- */
.page-about .band-grid {
  margin-top: clamp(26px, 4vw, 42px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-about .band-tile {
  position: relative;
  background: var(--c-deep);
  border-top: 2px solid var(--accent, var(--c-cyan));
  padding: 24px 20px 28px;
}

.page-about .band-tile__tag {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent, var(--c-cyan));
}

.page-about .band-tile__title {
  margin: 12px 0 0;
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.page-about .band-tile__text {
  margin-top: 12px;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--c-muted);
}

@media (min-width: 760px) {
  .page-about .band-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .band-tile {
    padding: 30px 26px 34px;
  }
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  gap: 18px;
}

.page-about .team-card {
  background: var(--c-panel);
  padding: 24px 20px 26px;
}

.page-about .team-card__num {
  font-family: var(--font-data);
  font-size: clamp(1.9rem, 6vw, 2.7rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  color: var(--accent, var(--c-cyan));
}

.page-about .team-card__role {
  margin-top: 10px;
  font-size: 1.0625rem;
  font-weight: 700;
}

.page-about .team-card__desc {
  margin-top: 10px;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--c-muted);
}

@media (min-width: 880px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
  .page-about .team-grid > :nth-child(2) {
    margin-top: 44px;
  }
  .page-about .team-grid > :nth-child(3) {
    margin-top: 88px;
  }
}

.page-about .cadence {
  margin-top: clamp(36px, 5vw, 56px);
  padding-top: clamp(24px, 4vw, 36px);
  border-top: 1px solid var(--c-line);
  display: grid;
  gap: 14px;
}

.page-about .cadence__item {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-about .cadence__key {
  display: inline-block;
  min-width: 84px;
  margin-right: 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-gold);
}

.page-about .cadence__foot {
  margin-top: 6px;
}

.page-about .link {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 230, 210, 0.4);
  padding-bottom: 2px;
}

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

.page-about .about-figure {
  margin: clamp(28px, 5vw, 48px) 0 0;
}

/* ---------- 里程碑轨道 ---------- */
.page-about .timeline {
  list-style: none;
  position: relative;
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding: 0;
  counter-reset: ms;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-violet) 52%, var(--c-pink));
  opacity: 0.55;
}

.page-about .timeline__item {
  position: relative;
  counter-increment: ms;
  padding: 0 0 40px 52px;
}

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

.page-about .timeline__idx {
  position: absolute;
  left: 0;
  top: 2px;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: var(--c-void);
  border: 1px solid var(--c-line);
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--c-cyan);
}

.page-about .timeline__idx::before {
  content: counter(ms, decimal-leading-zero);
}

.page-about .timeline__stage {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-about .timeline__title {
  margin: 8px 0 0;
  font-size: clamp(1.1rem, 3vw, 1.45rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-about .timeline__text {
  margin-top: 10px;
  max-width: 48ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .timeline__figure {
  margin-top: 20px;
}

@media (min-width: 900px) {
  .page-about .timeline {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 0;
  }
  .page-about .timeline::before {
    left: 50%;
    top: 10px;
    bottom: 10px;
  }
  .page-about .timeline__item {
    padding: 0 0 56px;
  }
  .page-about .timeline__item:nth-child(odd) {
    grid-column: 1;
    padding-right: 60px;
    text-align: right;
  }
  .page-about .timeline__item:nth-child(even) {
    grid-column: 2;
    padding-left: 60px;
  }
  .page-about .timeline__item:nth-child(odd) .timeline__text {
    margin-left: auto;
  }
  .page-about .timeline__item:nth-child(odd) .timeline__idx {
    left: auto;
    right: -15px;
  }
  .page-about .timeline__item:nth-child(even) .timeline__idx {
    left: -15px;
  }
  .page-about .timeline__item:last-child {
    padding-bottom: 0;
  }
}

/* ---------- 赛事数据带 ---------- */
.page-about .arena {
  padding: clamp(48px, 7vw, 88px) 0;
  border-bottom: 1px solid var(--c-line);
  background:
    radial-gradient(90% 70% at 0% 0%, rgba(124, 92, 255, 0.16), transparent 62%),
    var(--c-deep);
}

.page-about .arena__grid {
  margin-top: clamp(26px, 4vw, 42px);
  display: grid;
  gap: 32px;
}

@media (min-width: 900px) {
  .page-about .arena__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 48px;
    align-items: start;
  }
}

.page-about .arena__tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .arena .tab {
  appearance: none;
  background: transparent;
  border: 1px solid var(--c-line);
  color: var(--c-muted);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  padding: 9px 14px;
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-about .arena .tab:hover {
  color: var(--c-text);
  border-color: var(--c-violet);
}

.page-about .arena .tab[aria-selected="true"] {
  background: var(--c-violet);
  border-color: var(--c-violet);
  color: var(--c-void);
}

.page-about .arena .tab:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-about .tab-panel[hidden] {
  display: none;
}

.page-about .arena-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--c-line);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.page-about .arena-list li {
  display: grid;
  gap: 6px;
  background: var(--c-deep);
  padding: 18px 2px;
}

.page-about .arena-list__num {
  font-family: var(--font-data);
  font-size: clamp(1.25rem, 4vw, 1.7rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--c-gold);
}

.page-about .arena-list__text {
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--c-muted);
}

@media (min-width: 560px) {
  .page-about .arena-list li {
    grid-template-columns: 170px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }
}

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

/* ---------- 认证与联络 ---------- */
.page-about .about-cert {
  border-bottom: 0;
}

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

.page-about .about-cert__text p {
  margin-top: 16px;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-muted);
}

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

@media (min-width: 900px) {
  .page-about .about-cert__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: center;
    gap: 56px;
  }
  .page-about .about-cert__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ---------- 图片 ---------- */
.page-about .figure__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--c-line);
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}
<<<END>>>