.page-about {
  --about-sec-gap: clamp(40px, 7vw, 88px);
  --about-soft-line: rgba(50, 70, 60, 0.55);
}

.page-about .figure img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-block: clamp(24px, 4vw, 48px) clamp(28px, 5vw, 56px);
}

.page-about .about-hero__grid {
  align-items: start;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 5.6vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 14px 0 0;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.82;
}

.page-about .about-hero__lede + .about-hero__lede {
  margin-top: 12px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-hero__figure {
  border-radius: var(--r-lg);
  overflow: hidden;
}

/* ---------- 章节刻度导航 ---------- */

.page-about .about-rail {
  border-block: 1px solid var(--about-soft-line);
  background: linear-gradient(180deg, rgba(11, 20, 16, 0.72), rgba(5, 9, 10, 0.42));
  margin-block: clamp(8px, 1.5vw, 16px);
}

.page-about .about-rail__list {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 8px 0;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-rail__list > li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-rail__no {
  font-size: 11px;
  color: var(--line);
  letter-spacing: 0.08em;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  background: var(--cyan-soft);
  outline: none;
}

.page-about .about-rail__link[aria-current="true"] {
  color: var(--orange);
  border-color: rgba(255, 106, 0, 0.5);
  background: var(--orange-soft);
}

.page-about .about-rail__link[aria-current="true"] .about-rail__no {
  color: var(--orange);
}

/* ---------- 通用章节头部 ---------- */

.page-about .about-sec {
  scroll-margin-top: 24px;
}

.page-about .about-sec__head {
  max-width: 70ch;
}

.page-about .about-sec__head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.005em;
  color: var(--paper);
  margin: 12px 0 0;
}

.page-about .about-sec__intro {
  margin: 14px 0 0;
  color: var(--mist);
  line-height: 1.8;
  max-width: 62ch;
}

/* ---------- 三条业务线 ---------- */

.page-about .about-lanes {
  margin-top: clamp(24px, 4vw, 44px);
  gap: clamp(16px, 2.6vw, 28px);
}

.page-about .about-lane {
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--r-lg);
  position: relative;
  overflow: hidden;
}

.page-about .about-lane::after {
  content: "";
  position: absolute;
  inset: auto -30% -60% auto;
  width: 190px;
  height: 190px;
  border-radius: 46% 54% 60% 40%;
  background: var(--cyan-soft);
  pointer-events: none;
}

.page-about .about-lane:nth-child(1)::after {
  background: var(--orange-soft);
}

.page-about .about-lane__no {
  display: block;
  font-size: clamp(34px, 4vw, 48px);
  line-height: 1;
  font-weight: 600;
  color: var(--cyan);
  opacity: 0.6;
}

.page-about .about-lane:nth-child(1) .about-lane__no {
  color: var(--orange);
}

.page-about .about-lane__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.2vw, 26px);
  color: var(--paper);
  margin: 16px 0 0;
  letter-spacing: 0.01em;
}

.page-about .about-lane__text {
  margin: 12px 0 0;
  color: var(--mist);
  line-height: 1.78;
  font-size: 15px;
}

.page-about .about-lane__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .about-lane__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.88;
}

.page-about .about-lane__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-lane:nth-child(1) .about-lane__list li::before {
  background: var(--orange);
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-coverage__grid {
  align-items: start;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-coverage__main h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.16;
  color: var(--paper);
  margin: 12px 0 0;
}

.page-about .about-coverage__text {
  margin: 16px 0 0;
  max-width: 62ch;
  color: var(--mist);
  line-height: 1.82;
}

.page-about .about-split {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-split__bar {
  display: flex;
  height: 22px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--about-soft-line);
}

.page-about .about-split__seg--fb {
  width: 58.33%;
  background: linear-gradient(90deg, rgba(31, 216, 190, 0.9), rgba(31, 216, 190, 0.42));
}

.page-about .about-split__seg--bb {
  flex: 1;
  background: linear-gradient(90deg, rgba(255, 106, 0, 0.42), rgba(255, 106, 0, 0.92));
}

.page-about .about-split__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  font-size: 13px;
  color: var(--mist);
  letter-spacing: 0.03em;
}

.page-about .about-split__legend li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-split__legend b {
  color: var(--paper);
  font-size: 15px;
}

.page-about .about-split__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
}

.page-about .about-split__dot--fb {
  background: var(--cyan);
}

.page-about .about-split__dot--bb {
  background: var(--orange);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  background: var(--about-soft-line);
  border: 1px solid var(--about-soft-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-metrics__item {
  background: var(--ink-2);
  padding: 16px 18px;
}

.page-about .about-metrics__item dt {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-metrics__item dd {
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--paper);
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
}

.page-about .about-metrics__num {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 600;
  color: var(--cyan);
  line-height: 1;
}

.page-about .about-metrics__item:nth-child(3) .about-metrics__num,
.page-about .about-metrics__item:nth-child(4) .about-metrics__num {
  color: var(--orange);
}

.page-about .about-coverage__figure {
  border-radius: var(--r-lg);
  overflow: hidden;
}

/* ---------- 发展历程 ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  border-left: 1px solid var(--about-soft-line);
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: clamp(22px, 3vw, 34px);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(31, 216, 190, 0.12);
}

.page-about .about-timeline__item--key::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.16);
}

.page-about .about-timeline__stage {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-timeline__item--key .about-timeline__stage {
  color: var(--orange);
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2vw, 23px);
  color: var(--paper);
  margin: 8px 0 0;
  letter-spacing: 0.01em;
}

.page-about .about-timeline__text {
  margin: 10px 0 0;
  max-width: 64ch;
  color: var(--mist);
  line-height: 1.8;
  font-size: 15px;
}

/* ---------- 团队 ---------- */

.page-about .about-crew {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 22px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-crew__card {
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--r-lg);
  transition: border-color 0.24s ease, transform 0.24s ease;
}

.page-about .about-crew__card:hover,
.page-about .about-crew__card:focus-within {
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.page-about .about-crew__num {
  display: block;
  font-size: clamp(44px, 5vw, 62px);
  font-weight: 600;
  line-height: 1;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .about-crew__card:nth-child(2) .about-crew__num {
  color: var(--cyan);
}

.page-about .about-crew__card:nth-child(3) .about-crew__num {
  color: var(--orange);
}

.page-about .about-crew__role {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2vw, 22px);
  color: var(--paper);
  margin: 12px 0 0;
  font-weight: 600;
}

.page-about .about-crew__text {
  margin: 12px 0 0;
  color: var(--mist);
  line-height: 1.8;
  font-size: 15px;
}

.page-about .about-crew__keys {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-about .about-crew__key {
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--about-soft-line);
  color: var(--mist);
  transition: color 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.page-about .about-crew__card:hover .about-crew__key,
.page-about .about-crew__card:focus-within .about-crew__key {
  color: var(--paper);
  border-color: var(--cyan);
  background: var(--cyan-soft);
}

/* ---------- 俱乐部简史 ---------- */

.page-about .about-chronicle__grid {
  align-items: start;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-chronicle__main h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.16;
  color: var(--paper);
  margin: 12px 0 0;
}

.page-about .about-chronicle__text {
  margin: 16px 0 0;
  max-width: 64ch;
  color: var(--mist);
  line-height: 1.82;
}

.page-about .about-chronicle__text + .about-chronicle__text {
  margin-top: 12px;
}

.page-about .about-chronicle__sample {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: clamp(18px, 2.4vw, 26px) clamp(18px, 2.6vw, 30px);
  border-left: 2px solid var(--orange);
  background: linear-gradient(90deg, var(--orange-soft), rgba(11, 20, 16, 0));
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.page-about .about-chronicle__sample-line {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-chronicle__sample-line + .about-chronicle__sample-line {
  margin-top: 12px;
}

.page-about .about-chronicle__tag {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
  vertical-align: 2px;
}

.page-about .about-chronicle__figure {
  border-radius: var(--r-lg);
  overflow: hidden;
}

/* ---------- 合作与授权 ---------- */

.page-about .about-partners {
  margin-top: clamp(24px, 4vw, 40px);
  gap: clamp(16px, 2.6vw, 26px);
  align-items: stretch;
}

.page-about .about-partner {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--r-lg);
}

.page-about .about-partner__tag {
  align-self: flex-start;
}

.page-about .about-partner__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2vw, 23px);
  color: var(--paper);
  margin: 6px 0 0;
}

.page-about .about-partner__text {
  margin: 0;
  flex: 1;
  color: var(--mist);
  line-height: 1.8;
  font-size: 15px;
}

.page-about .about-partner .btn {
  align-self: flex-start;
}

.page-about .about-next {
  margin-top: clamp(28px, 4.4vw, 52px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--about-soft-line);
  border-radius: var(--r-lg);
  background: linear-gradient(120deg, rgba(31, 216, 190, 0.08), rgba(255, 106, 0, 0.06));
}

.page-about .about-next__lead {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--paper);
}

.page-about .about-next__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 16px;
}

.page-about .about-next__link {
  display: block;
  padding: 11px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--about-soft-line);
  background: rgba(22, 36, 29, 0.6);
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.22s ease, color 0.22s ease, background 0.22s ease;
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-soft);
  outline: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 880px) {
  .page-about .about-lane:nth-child(2) {
    margin-top: 16px;
  }

  .page-about .about-lane:nth-child(3) {
    margin-top: 32px;
  }

  .page-about .about-crew {
    grid-template-columns: 1.15fr 1fr 0.9fr;
  }

  .page-about .about-crew__card:nth-child(2) {
    margin-top: 18px;
  }

  .page-about .about-crew__card:nth-child(3) {
    margin-top: 36px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: 8fr 4fr;
  }

  .page-about .about-chronicle__grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .about-rail__list {
    flex-wrap: wrap;
    overflow-x: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-crew__card,
  .page-about .about-rail__link,
  .page-about .about-crew__key,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-crew__card:hover,
  .page-about .about-crew__card:focus-within {
    transform: none;
  }
}
<<<END>>>