.page-about {
  --about-sec-pad: clamp(44px, 7vw, 88px);
  --about-card: #12224A;
  --about-line: #253A66;
  background: var(--navy);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: clamp(88px, 12vw, 128px);
}

.page-about .about-hero__inner {
  max-width: 880px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 7vw, 60px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 18px 0 0;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 40ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--about-line);
}

.page-about .about-hero__stat {
  background: var(--about-card);
  padding: 18px 16px 20px;
}

.page-about .about-hero__stat dt {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.page-about .about-hero__stat dd {
  margin: 10px 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-num--sm {
  font-size: clamp(24px, 4.4vw, 32px);
}

.page-about .about-num--lg {
  font-size: clamp(52px, 12vw, 96px);
  color: var(--orange);
}

.page-about .about-unit {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--mist);
  letter-spacing: 0.04em;
}

.page-about .about-hero__stat--wide {
  grid-column: 1 / -1;
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--about-line);
}

/* ---------- 主体两栏骨架 ---------- */

.page-about .about-body {
  padding-top: clamp(40px, 6vw, 72px);
  padding-bottom: clamp(56px, 8vw, 96px);
}

.page-about .about-body__inner {
  display: grid;
  gap: 24px;
}

/* ---------- 左侧目录轨道 ---------- */

.page-about .about-spine {
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
  background: rgba(18, 34, 74, 0.72);
  padding: 14px 14px 12px;
}

.page-about .about-spine__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-spine__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-spine__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  color: var(--mist);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-about .about-spine__link:hover,
.page-about .about-spine__link:focus-visible {
  color: var(--cyan);
  border-color: var(--about-line);
  background: rgba(47, 227, 232, 0.08);
}

.page-about .about-spine__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

/* ---------- 区块通用 ---------- */

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

.page-about .about-sec {
  padding-block: var(--about-sec-pad);
  border-top: 1px solid var(--about-line);
}

.page-about .about-flow > .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec__head {
  max-width: 66ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-sec h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4.6vw, 42px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-sec__lede {
  margin: 14px 0 0;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */

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

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 26px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 25px;
  top: 36px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, var(--about-line), rgba(37, 58, 102, 0));
}

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

.page-about .about-timeline__item:last-child::before {
  display: none;
}

.page-about .about-timeline__ver {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-pill);
  background: var(--about-card);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .about-timeline__body h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.42;
  color: var(--paper);
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 更新节奏三步 ---------- */

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-steps__item {
  position: relative;
  padding: 20px 20px 22px 22px;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r-md);
  background: var(--about-card);
}

.page-about .about-steps__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-steps__item h3 {
  margin: 8px 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--about-line);
}

.page-about .about-figure--wide img {
  aspect-ratio: 4 / 3;
}

.page-about .about-figure__cap {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 球队档案 ---------- */

.page-about .about-archive {
  display: grid;
  gap: 24px;
}

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

.page-about .about-archive__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--about-line);
}

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

.page-about .about-fields {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-fields__item {
  padding: 14px 16px 16px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  background: rgba(18, 34, 74, 0.68);
  transition: border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-about .about-fields__item:hover {
  border-color: var(--cyan);
  background: rgba(47, 227, 232, 0.07);
}

.page-about .about-fields__item p {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-archive__note {
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--orange);
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
}

/* ---------- 团队 ---------- */

.page-about .about-teams {
  display: grid;
  gap: 14px;
}

.page-about .about-team {
  padding: 22px 20px 24px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--about-card) 0%, rgba(10, 22, 48, 0.9) 100%);
}

.page-about .about-team__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(38px, 8vw, 56px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-team h3 {
  margin: 12px 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  display: grid;
  gap: 18px;
  padding: 24px 20px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
  background: var(--about-card);
}

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

.page-about .about-eco__leadnote {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 30ch;
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-eco__list li {
  padding-top: 16px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-eco__list h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-eco__list p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-records {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--about-line);
}

.page-about .about-records li {
  background: var(--navy);
  padding: 18px 14px;
}

.page-about .about-records__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .about-records__label {
  display: block;
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 服务范围 ---------- */

.page-about .about-sec--scope {
  padding-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-sec--scope .prose {
  max-width: 62ch;
}

.page-about .about-sec--scope .prose p {
  margin: 0 0 1.3em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--paper);
}

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

.page-about .about-sec--scope .prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 232, 0.45);
  transition: border-color var(--dur) var(--ease);
}

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

.page-about .about-contact {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-contact li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  background: rgba(18, 34, 74, 0.6);
}

.page-about .about-contact__k {
  flex: 0 0 auto;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-contact__v {
  font-size: 15.5px;
  color: var(--paper);
  word-break: break-word;
}

/* ---------- 延伸入口 ---------- */

.page-about .about-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--about-line);
}

.page-about .about-next__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px dashed rgba(255, 138, 31, 0.6);
  border-radius: var(--r-pill);
  background: rgba(255, 138, 31, 0.06);
  color: var(--paper);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.page-about .about-next__link::after {
  content: "→";
  color: var(--orange);
  font-family: var(--font-mono);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  border-color: var(--orange);
  border-style: solid;
  background: rgba(255, 138, 31, 0.14);
  color: var(--orange);
}

/* ---------- 断点 ---------- */

@media (min-width: 600px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-hero__stat--wide {
    grid-column: auto;
  }

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

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

  .page-about .about-figure--wide img {
    aspect-ratio: 12 / 5;
  }

  .page-about .about-records {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-archive {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-archive__figure {
    position: sticky;
    top: 96px;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.35fr);
    gap: 36px;
    padding: 32px 30px;
  }

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

@media (min-width: 1000px) {
  .page-about .about-body__inner {
    grid-template-columns: 158px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-spine {
    position: sticky;
    top: 96px;
    padding: 18px 14px;
  }

  .page-about .about-spine__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .about-spine__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 10px 12px;
    border-radius: var(--r-md);
    white-space: normal;
  }

  .page-about .about-spine__text {
    font-size: 13.5px;
    line-height: 1.42;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-spine__link,
  .page-about .about-fields__item,
  .page-about .about-next__link,
  .page-about .about-sec--scope .prose a {
    transition: none;
  }
}
<<<END>>>