.page-about {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .about-shell {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 18px;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 26px 0 0;
  font-size: 13px;
  color: var(--stand);
}

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

.page-about .breadcrumb a:hover {
  text-decoration: underline;
}

/* ---------- 通用小节标题 ---------- */
.page-about .sec-label {
  display: inline-block;
  margin: 0 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--line-red);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--crimson);
  font-weight: 600;
}

.page-about .sec-head {
  max-width: 64ch;
  margin-bottom: 30px;
}

.page-about .sec-head h2,
.page-about .reach__body h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(25px, 4.4vw, 40px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .sec-lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .hero {
  padding: 30px 0 44px;
}

.page-about .hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: start;
}

.page-about .hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(31px, 7.6vw, 62px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--ink);
  max-width: 16ch;
}

.page-about .hero__title em {
  font-style: normal;
  color: var(--ink);
  background: var(--signal);
  box-shadow: 0 0 0 5px var(--signal);
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.page-about .hero__lead {
  margin: 0 0 26px;
  max-width: 48ch;
  font-size: 17px;
  line-height: 1.8;
}

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

/* ---------- 记分牌 ---------- */
.page-about .scoreboard {
  position: relative;
  padding: 26px 20px 22px;
  background: var(--night);
  border-radius: var(--radius);
  color: var(--cream);
  overflow: hidden;
}

.page-about .scoreboard::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--signal) 0%, var(--line-red) 58%, rgba(16, 28, 36, 0) 100%);
}

.page-about .scoreboard__cap {
  margin: 0 0 20px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--signal);
}

.page-about .scoreboard__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
}

.page-about .score-card {
  padding-left: 13px;
  border-left: 1px solid rgba(246, 239, 228, .16);
}

.page-about .score-card:nth-child(odd) {
  border-left-color: var(--line-red);
}

.page-about .score-card__num {
  display: block;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(23px, 4.8vw, 33px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .score-card__unit {
  margin-left: 3px;
  font-size: 13px;
  color: var(--signal);
}

.page-about .score-card__label {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(246, 239, 228, .72);
}

/* ---------- 时间轴 ---------- */
.page-about .track {
  padding: 48px 0 8px;
  border-top: 1px solid var(--grid);
  margin-top: 8px;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  border-left: 1px solid var(--grid);
}

.page-about .timeline__item {
  position: relative;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 21px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--crimson);
  z-index: 1;
}

.page-about .timeline__item:first-child::before {
  background: var(--signal);
  border-color: var(--signal);
}

.page-about .timeline__fold {
  border-bottom: 1px solid var(--grid);
}

.page-about .timeline__trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 16px 0 15px;
  cursor: pointer;
  list-style: none;
}

.page-about .timeline__trigger::-webkit-details-marker {
  display: none;
}

.page-about .timeline__stage {
  flex: 0 0 auto;
  padding: 3px 9px;
  background: var(--ink);
  border-radius: var(--radius);
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--signal);
}

.page-about .timeline__name {
  flex: 1 1 140px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .timeline__fold[open] .timeline__name {
  color: var(--crimson);
}

.page-about .timeline__panel {
  padding: 0 0 22px;
}

.page-about .timeline__panel p {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stand);
}

/* ---------- 横向数据带 ---------- */
.page-about .coverage {
  padding: 44px 0 8px;
}

.page-about .datarow__wrap {
  position: relative;
  margin-top: 6px;
}

.page-about .datarow__wrap::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 12px;
  width: 56px;
  background: linear-gradient(90deg, rgba(246, 239, 228, 0), var(--cream));
  pointer-events: none;
}

.page-about .datarow {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 6px 0 18px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .datarow__item {
  flex: 0 0 auto;
  min-width: 176px;
  padding: 0 24px;
  border-left: 1px solid var(--line-red);
}

.page-about .datarow__item:first-child {
  padding-left: 0;
  border-left: 0;
}

.page-about .datarow__num {
  display: block;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--ink);
  white-space: nowrap;
}

.page-about .datarow__txt {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stand);
}

/* ---------- 团队暗红区 ---------- */
.page-about .crew {
  position: relative;
  margin-top: 44px;
  padding: 52px 0;
  background: var(--crimson);
  color: var(--cream);
}

.page-about .crew::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 68% at 90% 0%, rgba(16, 28, 36, .5), rgba(16, 28, 36, 0) 62%);
  pointer-events: none;
}

.page-about .crew .about-shell {
  position: relative;
}

.page-about .crew .sec-label {
  border-top-color: rgba(246, 239, 228, .45);
  color: var(--signal);
}

.page-about .crew .sec-head h2 {
  color: var(--cream);
}

.page-about .crew .sec-head .sec-lead {
  color: rgba(246, 239, 228, .82);
}

.page-about .crew__cols {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: 8px;
  border-top: 1px solid rgba(246, 239, 228, .26);
}

.page-about .crew__col {
  padding: 26px 0;
  border-bottom: 1px solid rgba(246, 239, 228, .26);
}

.page-about .crew__col--key {
  background: linear-gradient(180deg, rgba(232, 163, 23, .16), rgba(232, 163, 23, 0) 78%);
}

.page-about .crew__num {
  display: block;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--signal);
}

.page-about .crew__role {
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .crew__col--key .crew__role {
  color: var(--signal);
}

.page-about .crew__desc {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(246, 239, 228, .82);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--sand);
}

.page-about .about-figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stand);
}

.page-about .crew .about-figure {
  margin-bottom: 34px;
}

.page-about .crew .about-figure__cap {
  color: rgba(246, 239, 228, .68);
}

/* ---------- 合作生态 ---------- */
.page-about .eco {
  padding: 52px 0 12px;
}

.page-about .eco__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: center;
}

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

.page-about .eco__list li {
  position: relative;
  padding: 16px 0 16px 20px;
  border-top: 1px solid var(--grid);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .eco__list li:last-child {
  border-bottom: 1px solid var(--grid);
}

.page-about .eco__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 25px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
}

.page-about .eco__list strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .eco__list a {
  color: var(--cyan);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
}

.page-about .eco__list a:hover {
  color: var(--crimson);
  border-bottom-color: var(--crimson);
}

/* ---------- 用户分布 ---------- */
.page-about .reach {
  margin-top: 44px;
  padding: 52px 0 56px;
  background: var(--sand);
}

.page-about .reach__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

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

.page-about .reach__body .sec-lead {
  max-width: 58ch;
}

.page-about .reach__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 18px;
  margin: 26px 0 22px;
  padding-top: 22px;
  border-top: 1px solid var(--grid);
}

.page-about .reach-stat {
  padding-left: 12px;
  border-left: 3px solid var(--signal);
}

.page-about .reach-stat__num {
  display: block;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--ink);
}

.page-about .reach-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stand);
}

.page-about .reach__note {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 产品规则折叠 ---------- */
.page-about .rules {
  padding: 52px 0 44px;
}

.page-about .rule-list {
  border-top: 1px solid var(--grid);
}

.page-about .rule {
  border-bottom: 1px solid var(--grid);
}

.page-about .rule .fold__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .rule[open] .fold__trigger {
  color: var(--crimson);
}

.page-about .rule .fold__panel {
  margin-bottom: 16px;
  padding: 18px 18px 20px;
  background: var(--night);
  border-radius: var(--radius);
  color: rgba(246, 239, 228, .86);
}

.page-about .rule .fold__panel p {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  margin-bottom: 56px;
  padding: 30px 22px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--cream);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.4vw, 28px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-cta__lead {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stand);
}

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

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-about .about-shell {
    padding: 0 32px;
  }

  .page-about .hero {
    padding: 44px 0 60px;
  }

  .page-about .hero__grid {
    grid-template-columns: 42fr 58fr;
    gap: 52px;
  }

  .page-about .eco__grid {
    grid-template-columns: 58fr 42fr;
    gap: 46px;
  }

  .page-about .reach__grid {
    grid-template-columns: 42fr 58fr;
    gap: 52px;
  }

  .page-about .crew__cols {
    grid-template-columns: 34fr 34fr 32fr;
  }

  .page-about .crew__col {
    padding: 30px 26px 30px 0;
    border-bottom: 0;
    border-right: 1px solid rgba(246, 239, 228, .26);
  }

  .page-about .crew__col:last-child {
    padding-right: 0;
    border-right: 0;
  }

  .page-about .about-cta {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 12px 40px;
    padding: 34px 32px;
  }

  .page-about .about-cta__title,
  .page-about .about-cta__lead {
    grid-column: 1;
  }

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

  .page-about .about-cta__actions {
    grid-column: 2;
    grid-row: 1 / span 2;
    flex-direction: column;
    align-items: stretch;
  }
}

@media (min-width: 1180px) {
  .page-about .about-shell {
    padding: 0 40px;
  }
}
<<<END>>>