.page-about {
  --a-pad: clamp(46px, 7vw, 100px);
  --a-gap: clamp(16px, 2.4vw, 28px);
  background: var(--ink);
  color: var(--fog);
  font-family: var(--font-sans);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about * {
  box-sizing: border-box;
}

.page-about a {
  color: inherit;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  background: linear-gradient(172deg, var(--turf) 0 54%, var(--ink) 54% 100%);
  padding-top: clamp(16px, 3vw, 26px);
  overflow: hidden;
}

.page-about .hero-grid {
  display: grid;
  gap: var(--a-gap);
  padding-top: clamp(24px, 5vw, 52px);
}

.page-about .hero-eyebrow {
  margin: 0 0 16px;
}

.page-about .hero-title {
  margin: 0;
  font-size: clamp(2.2rem, 6.4vw, 4.3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--paper);
}

.page-about .hero-title em {
  font-style: normal;
  color: var(--mint);
}

.page-about .hero-lede {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: clamp(0.98rem, 2.4vw, 1.08rem);
  color: rgba(232, 240, 236, 0.82);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .hero-slice {
  border: 1px solid var(--line-strong);
  background: rgba(7, 26, 43, 0.62);
  padding: clamp(15px, 3vw, 22px);
  box-shadow: 10px 10px 0 rgba(56, 242, 196, 0.08);
}

.page-about .slice-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .slice-note {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--mute);
}

.page-about .slice-body {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .slice-name {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-about .slice-col--amber .slice-name {
  color: var(--amber);
}

.page-about .slice-col--mint .slice-name {
  color: var(--mint);
}

.page-about .slice-list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .slice-list li {
  position: relative;
  padding-left: 14px;
  font-size: 0.84rem;
  line-height: 1.65;
  color: rgba(232, 240, 236, 0.82);
}

.page-about .slice-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 2px;
}

.page-about .slice-col--amber .slice-list li::before {
  background: var(--amber);
}

.page-about .slice-col--mint .slice-list li::before {
  background: var(--mint);
}

.page-about .hero-media-wrap {
  padding-top: clamp(26px, 5vw, 54px);
  padding-bottom: 0;
}

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

.page-about .hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.86) brightness(0.92);
}

/* ---------- 章节索引 ---------- */

.page-about .a-index {
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-about .a-index ol {
  list-style: none;
  margin: 0;
  padding: 14px 0;
  display: flex;
  gap: clamp(16px, 3vw, 36px);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .a-index ol::-webkit-scrollbar {
  display: none;
}

.page-about .a-index a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  text-decoration: none;
  font-size: 0.82rem;
  color: var(--mute);
  transition: color 0.2s ease;
}

.page-about .a-index a span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--mint);
}

.page-about .a-index a:hover,
.page-about .a-index a:focus-visible {
  color: var(--paper);
}

/* ---------- 章节骨架 ---------- */

.page-about .a-sec {
  padding: var(--a-pad) 0;
}

.page-about .sec-head {
  display: grid;
  gap: 8px;
  padding-bottom: 16px;
  margin-bottom: clamp(24px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
}

.page-about .sec-num {
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 8vw, 4.4rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: rgba(232, 240, 236, 0.16);
}

.page-about .sec-title {
  margin: 0;
  font-size: clamp(1.45rem, 3.6vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.015em;
  line-height: 1.24;
  color: var(--paper);
}

.page-about .sec-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--mint);
}

.page-about .mini-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--mute);
}

.page-about .fig-cap {
  margin: 10px 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- 01 两栏由来 ---------- */

.page-about .origin-body {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .origin-lead {
  margin-top: 0;
  font-size: clamp(1rem, 2.4vw, 1.1rem);
  color: var(--fog);
}

.page-about .origin-text p {
  margin: 0 0 16px;
  max-width: 36em;
  color: rgba(232, 240, 236, 0.82);
}

.page-about .origin-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .origin-list li {
  padding-left: 14px;
  border-left: 2px solid var(--stand);
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(232, 240, 236, 0.78);
}

.page-about .origin-list strong {
  display: block;
  color: var(--paper);
  font-weight: 800;
  margin-bottom: 2px;
}

.page-about .origin-fig {
  margin: 0;
}

.page-about .origin-fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  background: var(--stand);
}

/* ---------- 02 时间线 ---------- */

.page-about .timeline-sec {
  background: var(--turf);
}

.page-about .timeline-body {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-about .tl {
  list-style: none;
  margin: 0 0 0 5px;
  padding: 0 0 0 clamp(14px, 3vw, 26px);
  border-left: 1px dashed var(--line-strong);
  display: grid;
  gap: 16px;
}

.page-about .tl-node {
  position: relative;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid rgba(7, 26, 43, 0.2);
  padding: 15px 17px;
  box-shadow: 8px 8px 0 rgba(242, 239, 230, 0.07);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.page-about .tl-node:hover {
  box-shadow: 8px 8px 0 rgba(56, 242, 196, 0.16);
  transform: translateY(-2px);
}

.page-about .tl-node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  list-style: none;
}

.page-about .tl-node summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4.6vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.page-about .tl-name {
  font-size: 0.96rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .tl-phase {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  padding: 3px 7px;
  background: var(--indigo);
  color: var(--fog);
}

.page-about .tl-node p {
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(7, 26, 43, 0.82);
}

.page-about .tl-node[open]::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
}

.page-about .tl-node--amber[open]::before {
  background: var(--amber);
}

.page-about .tl-node--mint[open]::before {
  background: var(--mint);
}

.page-about .timeline-side {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .timeline-fig {
  margin: 0;
}

.page-about .timeline-fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line-strong);
}

.page-about .timeline-note {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: rgba(232, 240, 236, 0.7);
}

.page-about .timeline-note a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 196, 0.45);
}

/* ---------- 03 专题运营 ---------- */

.page-about .leagues-lede {
  max-width: 34em;
  margin: 0 0 clamp(24px, 4vw, 40px);
  font-size: clamp(1rem, 2.4vw, 1.12rem);
  font-weight: 700;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .leagues-body {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .league-facts {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .fact {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .fact-label {
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(232, 240, 236, 0.78);
}

.page-about .tags {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .tags li {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  padding: 5px 10px;
  border: 1px solid rgba(56, 242, 196, 0.4);
  color: var(--mint);
  background: rgba(56, 242, 196, 0.06);
}

.page-about .league-copy {
  margin: 0;
  max-width: 36em;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(232, 240, 236, 0.78);
}

/* ---------- 04 团队 ---------- */

.page-about .team-sec {
  background: var(--paper);
  color: var(--ink);
}

.page-about .team-sec .sec-head {
  border-bottom-color: rgba(7, 26, 43, 0.16);
}

.page-about .team-sec .sec-num {
  color: rgba(7, 26, 43, 0.16);
}

.page-about .team-sec .sec-title {
  color: var(--ink);
}

.page-about .team-sec .sec-kicker {
  color: #2f6b57;
}

.page-about .team-body {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .team-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(3.4rem, 11vw, 6rem);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.06em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .team-total-copy {
  margin: 14px 0 0;
  max-width: 30em;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(7, 26, 43, 0.8);
}

.page-about .team-rows {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .team-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px 0;
  border-top: 1px solid rgba(7, 26, 43, 0.16);
}

.page-about .team-row:last-child {
  border-bottom: 1px solid rgba(7, 26, 43, 0.16);
}

.page-about .team-count {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4.4vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  min-width: 1.6em;
}

.page-about .team-row:nth-child(1) .team-count {
  color: #b4700f;
}

.page-about .team-row:nth-child(2) .team-count {
  color: #15735c;
}

.page-about .team-row:nth-child(3) .team-count {
  color: var(--indigo);
}

.page-about .team-info h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .team-info p {
  margin: 0;
  max-width: 34em;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(7, 26, 43, 0.78);
}

/* ---------- 05 客户 ---------- */

.page-about .clients-sec {
  background: var(--ink);
}

.page-about .clients-body {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .client-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(3.2rem, 11vw, 5.6rem);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.06em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .client-num span {
  font-size: 0.28em;
  letter-spacing: 0;
  margin-left: 6px;
  color: var(--mute);
}

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

.page-about .client-list li {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(232, 240, 236, 0.76);
}

.page-about .client-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .client-list strong {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--mint);
}

/* ---------- 06 批次与联络 ---------- */

.page-about .batch-sec {
  background: var(--wine);
}

.page-about .batch-sec .sec-num {
  color: rgba(232, 240, 236, 0.2);
}

.page-about .batch-body {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .batch-copy p {
  margin: 0 0 18px;
  max-width: 36em;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(232, 240, 236, 0.82);
}

.page-about .batch-items {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .batch-items li {
  padding-left: 14px;
  border-left: 2px solid rgba(255, 178, 74, 0.55);
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(232, 240, 236, 0.76);
}

.page-about .batch-items strong {
  color: var(--amber);
  font-weight: 800;
  margin-right: 8px;
}

.page-about .batch-copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-about .batch-contact {
  border: 1px solid var(--line-strong);
  padding: clamp(16px, 3vw, 24px);
  background: rgba(7, 26, 43, 0.32);
}

.page-about .batch-contact-copy {
  margin: 0 0 18px;
  font-size: 0.9rem;
  line-height: 1.85;
  color: rgba(232, 240, 236, 0.8);
}

.page-about .contact-lines {
  margin: 0 0 20px;
  display: grid;
  gap: 12px;
}

.page-about .contact-lines div {
  display: grid;
  grid-template-columns: 3.4em 1fr;
  gap: 10px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-about .contact-lines dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--mute);
}

.page-about .contact-lines dd {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--fog);
  word-break: break-word;
}

.page-about .batch-back {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--mute);
}

.page-about .batch-back a {
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 240, 236, 0.28);
  padding-bottom: 1px;
}

.page-about .batch-back a:hover {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

/* ---------- 进入视口 ---------- */

.page-about [data-rise] {
  opacity: 1;
  transform: none;
}

.page-about .js [data-rise] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.page-about .js [data-rise].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 桌面 ---------- */

@media (min-width: 700px) {
  .page-about .slice-body {
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }

  .page-about .slice-body::after {
    content: "";
    position: absolute;
    top: 4%;
    bottom: 4%;
    left: 50%;
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--amber) 22%, var(--mint) 78%, transparent);
  }

  .page-about .slice-col--amber {
    padding-right: 20px;
  }

  .page-about .slice-col--mint {
    padding-left: 22px;
  }
}

@media (min-width: 880px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
    gap: clamp(30px, 4vw, 64px);
  }

  .page-about .sec-head {
    grid-template-columns: 110px 1fr;
    grid-template-areas:
      "num title"
      "num kicker";
    align-items: center;
    column-gap: 22px;
  }

  .page-about .sec-num {
    grid-area: num;
  }

  .page-about .sec-title {
    grid-area: title;
  }

  .page-about .sec-kicker {
    grid-area: kicker;
    align-self: start;
  }

  .page-about .origin-body {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: start;
  }

  .page-about .timeline-body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.6fr);
    align-items: start;
  }

  .page-about .timeline-side {
    position: sticky;
    top: 90px;
  }

  .page-about .leagues-body {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .team-body {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 1.38fr);
    align-items: start;
  }

  .page-about .clients-body {
    grid-template-columns: minmax(0, 0.44fr) minmax(0, 1.56fr);
    align-items: start;
  }

  .page-about .client-list li {
    grid-template-columns: 13em 1fr;
    gap: 22px;
    align-items: baseline;
  }

  .page-about .batch-body {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-rise],
  .page-about .js [data-rise] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .tl-node {
    transition: none;
  }
}
<<<END>>>