.page-about {
  --about-gap: clamp(22px, 4.5vw, 52px);
  --about-pad: clamp(16px, 3vw, 26px);
  color: var(--paper);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-crumb {
  margin: clamp(16px, 3vw, 26px) 0 clamp(16px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(28px, 5vw, 52px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__text .eyebrow {
  color: var(--sand-gold);
}

.page-about .about-hero h1 {
  font-family: var(--font-narrow);
  font-weight: 800;
  font-size: clamp(32px, 6.6vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 12px 0 18px;
  max-width: 15em;
}

.page-about .about-hero h1 em {
  display: block;
  font-style: normal;
  color: var(--sand-gold);
}

.page-about .about-hero .lede {
  max-width: 34em;
  color: var(--paper);
  opacity: 0.92;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .board {
  position: relative;
  padding: var(--about-pad);
  background:
    linear-gradient(158deg, rgba(47, 196, 178, 0.14), transparent 46%),
    linear-gradient(200deg, var(--stand-blue), var(--deep-ink) 76%);
  border-top: 2px solid var(--sand-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .board__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .board__nums {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 12px;
}

.page-about .board__nums li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 10px;
  border-left: 2px solid var(--line);
}

.page-about .board__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1;
  font-weight: 700;
  color: var(--score-cyan);
  letter-spacing: -0.03em;
}

.page-about .board__num sup {
  font-size: 0.42em;
  color: var(--sand-gold);
  vertical-align: super;
}

.page-about .board__small {
  font-size: 0.44em;
  color: var(--sand-light);
  margin-left: 2px;
}

.page-about .board__unit {
  font-size: 13px;
  color: var(--muted);
}

.page-about .board__foot {
  margin: 18px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sand-light);
}

/* ---------- 数据带 ---------- */
.page-about .about-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  list-style: none;
  margin: var(--about-gap) 0;
  padding: 0;
  background: var(--line-soft);
}

.page-about .about-strip .data-strip__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: var(--stand-blue);
}

.page-about .about-strip .data-strip__value {
  font-family: var(--font-mono);
  font-size: clamp(19px, 3.2vw, 26px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--sand-light);
}

.page-about .about-strip .data-strip__label {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-top: clamp(8px, 2vw, 16px);
}

.page-about .about-team__head {
  max-width: 46em;
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(22px, 4vw, 34px);
}

.page-about .team-list {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .team-row {
  border-left: 2px solid transparent;
  transition: border-color 0.25s var(--ease);
}

.page-about .team-row:has(.expand-trigger[aria-expanded="true"]) {
  border-left-color: var(--sand-gold);
}

.page-about .team-bar {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 16px 16px;
  border: 0;
  background: var(--stand-blue);
  color: var(--paper);
  font: inherit;
  text-align: left;
  cursor: pointer;
  overflow: hidden;
  transition: background 0.25s var(--ease);
}

.page-about .team-bar:hover,
.page-about .team-bar:focus-visible {
  background: #2c3e66;
}

.page-about .team-bar__fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: linear-gradient(90deg, rgba(217, 164, 65, 0.3), rgba(47, 196, 178, 0.16));
  border-right: 2px solid var(--sand-gold);
  transition: width 0.6s var(--ease);
}

.page-about .team-row--edit .team-bar__fill { width: 48%; }
.page-about .team-row--data .team-bar__fill { width: 19%; }
.page-about .team-row--tech .team-bar__fill { width: 33%; }

.page-about .team-bar__name,
.page-about .team-bar__count,
.page-about .team-bar .expand-trigger__icon {
  position: relative;
  z-index: 1;
}

.page-about .team-bar__name {
  font-family: var(--font-narrow);
  font-size: clamp(17px, 2.6vw, 21px);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-about .team-bar__count {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--sand-light);
}

.page-about .expand-trigger__icon {
  display: inline-block;
  width: 18px;
  height: 18px;
  position: relative;
  flex: none;
}

.page-about .expand-trigger__icon::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--sand-gold);
  border-bottom: 2px solid var(--sand-gold);
  transform: translate(-60%, -50%) rotate(-45deg);
  transition: transform 0.28s var(--ease);
}

.page-about .expand-trigger[aria-expanded="true"] .expand-trigger__icon::before {
  transform: translate(-40%, -50%) rotate(45deg);
}

.page-about .expand-panel {
  padding: 14px 16px 18px;
  background: rgba(14, 23, 40, 0.55);
  border-left: 2px solid var(--line);
}

.page-about .expand-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.88;
  max-width: 38em;
}

.page-about .team-list__note {
  margin: 6px 0 0;
  padding-left: 16px;
  border-left: 2px dashed var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-about .media-frame {
  position: relative;
  overflow: hidden;
  background: var(--stand-blue);
}

.page-about .media-frame--slant {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .media-frame--ratio-4x5 { aspect-ratio: 4 / 5; }
.page-about .media-frame--ratio-16x9 { aspect-ratio: 16 / 9; }

.page-about .media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 16px;
  background: rgba(14, 23, 40, 0.82);
  border-top: 2px solid var(--sand-gold);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sand-light);
}

/* ---------- 内容流程 ---------- */
.page-about .about-flow {
  margin-top: clamp(38px, 7vw, 74px);
  padding-top: clamp(24px, 4vw, 38px);
  border-top: 1px solid var(--line-soft);
}

.page-about .flow {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .flow__step {
  position: relative;
  padding: 18px 16px 20px;
  background: linear-gradient(180deg, rgba(38, 54, 90, 0.85), rgba(27, 42, 74, 0.55));
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  border-top: 2px solid var(--line);
}

.page-about .flow__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--signal-red);
  letter-spacing: -0.02em;
  line-height: 1;
}

.page-about .flow__title {
  margin: 10px 0 8px;
  font-family: var(--font-narrow);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-about .flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-history {
  margin-top: clamp(38px, 7vw, 74px);
}

.page-about .about-history .lede {
  max-width: 40em;
}

.page-about .track {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .track__item {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 0 clamp(12px, 2vw, 22px);
  align-items: start;
}

.page-about .track__tick {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 10px;
}

.page-about .track__ver {
  font-family: var(--font-mono);
  font-size: clamp(18px, 3vw, 24px);
  font-weight: 700;
  line-height: 1;
  color: var(--sand-gold);
  letter-spacing: -0.02em;
}

.page-about .track__stage {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.page-about .track__body {
  position: relative;
  padding-left: clamp(14px, 2.4vw, 22px);
  border-left: 2px dashed var(--line);
}

.page-about .track__body::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--sand-gold);
  box-shadow: 0 0 0 4px rgba(217, 164, 65, 0.16);
}

.page-about .track__trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 12px 0;
  border: 0;
  background: none;
  color: var(--paper);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .track__title {
  font-family: var(--font-narrow);
  font-size: clamp(16px, 2.6vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.01em;
}

.page-about .track__trigger:hover .track__title,
.page-about .track__trigger:focus-visible .track__title {
  color: var(--score-cyan);
}

.page-about .track__body .expand-panel {
  background: none;
  border-left: 0;
  padding: 0 0 8px;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach {
  margin-top: clamp(38px, 7vw, 74px);
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.page-about .about-reach__media {
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
  background: var(--deep-ink);
}

.page-about .about-reach__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  opacity: 0.55;
}

.page-about .map-slice {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  animation: about-drift 40s ease-in-out infinite alternate;
}

@keyframes about-drift {
  from { transform: translateX(-1.5%); }
  to { transform: translateX(1.5%); }
}

.page-about .map-slice__shape {
  fill: rgba(27, 42, 74, 0.72);
  stroke: var(--clay);
  stroke-width: 2;
  stroke-linejoin: round;
}

.page-about .map-slice__link {
  fill: none;
  stroke: var(--sand-gold);
  stroke-width: 1.4;
  stroke-dasharray: 7 9;
  opacity: 0.7;
}

.page-about .map-slice__dots circle {
  fill: var(--sand-gold);
  stroke: var(--deep-ink);
  stroke-width: 2;
}

.page-about .about-reach__text p {
  max-width: 36em;
  color: var(--paper);
  opacity: 0.88;
}

.page-about .reach-nums {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .reach-nums li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  background: var(--stand-blue);
  border-left: 2px solid var(--score-cyan);
}

.page-about .reach-nums__v {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--score-cyan);
}

.page-about .reach-nums__k {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  margin-top: clamp(38px, 7vw, 74px);
}

.page-about .partner-list {
  list-style: none;
  margin: clamp(20px, 4vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .partner-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 3vw, 26px);
  align-items: start;
  padding: clamp(16px, 3vw, 22px);
  background: linear-gradient(90deg, rgba(168, 90, 60, 0.18), rgba(27, 42, 74, 0.15) 45%, transparent);
  border-left: 3px solid var(--sand-gold);
}

.page-about .partner-list__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--sand-gold);
  letter-spacing: -0.03em;
}

.page-about .partner-list__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-narrow);
  font-size: 18px;
  font-weight: 700;
}

.page-about .partner-list__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 40em;
}

/* ---------- 节奏 ---------- */
.page-about .about-rhythm {
  margin-top: clamp(38px, 7vw, 74px);
}

.page-about .rhythm-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(20px, 4vw, 32px);
}

.page-about .rhythm-card {
  padding: clamp(18px, 3vw, 26px);
  background: var(--stand-blue);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  border-top: 3px solid var(--line);
}

.page-about .rhythm-card--match {
  border-top-color: var(--signal-red);
}

.page-about .rhythm-card--off {
  border-top-color: var(--score-cyan);
}

.page-about .rhythm-card__title {
  margin: 0 0 14px;
  font-family: var(--font-narrow);
  font-size: clamp(18px, 2.8vw, 22px);
  font-weight: 700;
}

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

.page-about .rhythm-card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.9;
}

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

.page-about .about-rhythm__photo {
  margin: clamp(22px, 4vw, 34px) 0 0;
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  margin-top: clamp(38px, 7vw, 74px);
  padding: clamp(22px, 4vw, 38px);
  background:
    linear-gradient(120deg, rgba(47, 196, 178, 0.14), transparent 58%),
    var(--deep-ink);
  border-left: 3px solid var(--sand-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .about-next__title {
  margin: 0 0 10px;
  font-family: var(--font-narrow);
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-next__text {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(16px, 3vw, 24px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 780px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-about .about-strip {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-team__photo {
    margin-top: 4px;
  }

  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .track__item {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 0 clamp(16px, 2.4vw, 30px);
  }

  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-about .about-reach__text {
    order: 2;
  }

  .page-about .about-reach__media {
    order: 1;
  }

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

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

@media (min-width: 1120px) {
  .page-about .board__nums {
    gap: 20px 16px;
  }

  .page-about .partner-list__item {
    grid-template-columns: 96px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .map-slice {
    animation: none;
  }

  .page-about .team-bar__fill {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>