.page-about {
  --about-chapter-gap: clamp(30px, 4.5vw, 56px);
  background: var(--night);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.5vw, 34px) 0 clamp(36px, 6vw, 76px);
  background:
    radial-gradient(120% 95% at 88% 0%, rgba(18, 160, 106, .26), transparent 62%),
    radial-gradient(95% 75% at 2% 100%, rgba(44, 224, 194, .12), transparent 58%),
    var(--night);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 90px;
  background-image: repeating-linear-gradient(118deg, rgba(44, 224, 194, .16) 0 2px, transparent 2px 18px);
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(22px, 3.5vw, 40px);
}

.page-about .breadcrumb a {
  color: var(--fog);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--mist);
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: var(--fs-annot);
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .about-kicker::before {
  content: "";
  width: 28px;
  height: 3px;
  background: var(--jade);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-about .about-hero__lead {
  max-width: 34em;
  margin: 0 0 28px;
  font-size: clamp(16px, 1.2vw, 18px);
  line-height: 1.8;
  color: rgba(238, 244, 242, .84);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  display: grid;
  gap: 4px;
  padding: 14px 12px;
  border: var(--line);
  border-left: 4px solid var(--jade);
  background: var(--slate);
  box-shadow: var(--shadow-hard);
}

.page-about .about-fact__num {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-fact__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--fog);
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  clip-path: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
  background: var(--slate);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  filter: saturate(.9) contrast(1.06);
}

.page-about .about-hero__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  padding: 10px 14px;
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
  background: linear-gradient(to top, rgba(6, 19, 31, .92), rgba(6, 19, 31, 0));
}

/* ---------- 主体布局 ---------- */

.page-about .about-layout {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-rail {
  border-top: 3px solid var(--jade);
  padding-top: 12px;
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--fog);
}

.page-about .about-rail__nav {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

.page-about .about-rail__nav::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__link {
  flex: 0 0 auto;
  display: block;
  padding: 4px 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--fog);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--mist);
}

.page-about .about-rail__link[data-active] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 章节 ---------- */

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

.page-about .chapter {
  border-top: 1px solid var(--iron);
  padding: var(--about-chapter-gap) 0;
  scroll-margin-top: 150px;
}

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

.page-about .chapter__head {
  display: grid;
  gap: 6px 18px;
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-about .chapter__num {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: .9;
  letter-spacing: .02em;
  color: var(--jade);
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 2.5vw, 32px);
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-about .chapter__body {
  display: grid;
  gap: 16px;
}

.page-about .chapter__body > p {
  max-width: 38em;
  margin: 0;
  color: rgba(238, 244, 242, .84);
}

.page-about .chapter__media {
  margin: 6px 0 0;
  border: var(--line);
  background: var(--slate);
}

.page-about .chapter__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

.page-about .chapter__media figcaption,
.page-about .coverage__media figcaption {
  padding: 10px 14px;
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.6;
  color: var(--fog);
  border-top: 1px solid var(--iron);
}

/* ---------- 赛事覆盖 ---------- */

.page-about .coverage {
  display: grid;
  gap: 22px;
  margin-top: 6px;
}

.page-about .coverage__panel {
  display: grid;
  gap: 18px;
  padding: clamp(18px, 2.6vw, 26px);
  border: var(--line);
  background: var(--slate);
  box-shadow: var(--shadow-hard);
}

.page-about .coverage__chart {
  max-width: 220px;
  width: 100%;
  margin: 0 auto;
}

.page-about .coverage__chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .coverage__legend {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 10px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .coverage__item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: var(--mist);
}

.page-about .coverage__dot {
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  background: var(--dot, var(--jade));
}

.page-about .coverage__media {
  margin: 0;
  border: var(--line);
  background: var(--navy);
}

.page-about .coverage__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(.9) contrast(1.04);
}

/* ---------- 团队 ---------- */

.page-about .team-grid {
  display: grid;
  gap: 16px;
}

.page-about .team-card {
  position: relative;
  padding: 20px 20px 22px;
  border: var(--line);
  background: var(--slate);
  box-shadow: var(--shadow-hard);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .team-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--cyan);
  transition: width var(--dur) var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-about .team-card:hover::before {
  width: 4px;
}

.page-about .team-card__tag {
  display: inline-block;
  margin: 0 0 10px;
}

.page-about .team-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.35;
  color: var(--mist);
}

.page-about .team-card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog);
}

/* ---------- 时间线 ---------- */

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 34px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: linear-gradient(to bottom, var(--jade), var(--iron));
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 6px;
  width: 15px;
  height: 15px;
  background: var(--amber);
  box-shadow: 0 0 0 3px var(--night);
  transform: rotate(45deg);
}

.page-about .timeline__stage {
  margin: 0 0 4px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .timeline__text {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(238, 244, 242, .86);
}

/* ---------- 资质与合作 ---------- */

.page-about .governance-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--iron);
}

.page-about .governance-list li {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--iron);
}

.page-about .governance-list__key {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .governance-list__key::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 3px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--jade);
}

.page-about .governance-list__desc {
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog);
}

/* ---------- 服务 ---------- */

.page-about .service-notes {
  display: grid;
  gap: 12px;
  margin-top: 6px;
}

.page-about .service-note {
  display: grid;
  gap: 2px;
  padding: 14px 16px;
  border: var(--line);
  border-left: 4px solid var(--amber);
  background: var(--navy);
}

.page-about .service-note__key {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--fog);
}

.page-about .service-note__val {
  font-size: 16px;
  color: var(--cyan);
}

/* ---------- 末尾行动区 ---------- */

.page-about .chapter--last {
  border-bottom: 0;
}

.page-about .about-cta {
  margin-top: 24px;
  padding: clamp(24px, 4vw, 44px);
  border: var(--line);
  background: linear-gradient(104deg, var(--navy) 0%, var(--navy) 58%, var(--jade-deep) 58%, var(--jade-deep) 100%);
  box-shadow: var(--shadow-hard);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 26px));
}

.page-about .about-cta__text {
  margin-bottom: 20px;
}

.page-about .about-cta__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2.2vw, 26px);
  line-height: 1.25;
  color: var(--mist);
}

.page-about .about-cta__sub {
  margin: 0;
  font-size: 15px;
  color: rgba(238, 244, 242, .78);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta__actions .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 返回顶部 ---------- */

.page-about .back-to-top {
  padding: 0 var(--gutter) clamp(30px, 5vw, 56px);
}

.page-about .back-to-top a {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--fog);
  text-decoration: none;
  border-bottom: 2px solid var(--iron);
  padding-bottom: 2px;
}

.page-about .back-to-top a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 媒体查询 ---------- */

@media (min-width: 720px) {
  .page-about .chapter__head {
    grid-template-columns: 68px minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .governance-list li {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
    gap: 18px;
    align-items: baseline;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }

  .page-about .coverage {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: stretch;
    gap: 26px;
  }

  .page-about .coverage__panel {
    align-content: center;
  }

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

  .page-about .about-cta {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 28px;
  }

  .page-about .about-cta__text {
    margin-bottom: 0;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 132px;
    align-self: start;
  }

  .page-about .about-rail__nav {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    white-space: normal;
    padding: 7px 0;
    font-size: 15px;
  }
}
<<<END>>>

.page-about {
  --dot: transparent;
}