.page-about {
  background: var(--ink);
  color: var(--snow);
  overflow-x: hidden;
}

/* ---------- 面包屑外壳 ---------- */
.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(4px, 1vw, 10px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 44px) 0 clamp(44px, 7vw, 92px);
  border-bottom: var(--rule);
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(118deg, rgba(23, 74, 99, 0.62) 0%, rgba(23, 74, 99, 0) 46%),
    repeating-linear-gradient(90deg, rgba(143, 208, 223, 0.055) 0 1px, transparent 1px 96px);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  top: 12%;
  width: 220px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--path));
  transform: rotate(-32deg);
  opacity: 0.6;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 52px);
}

.page-about .about-hero__lead h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7vw, 64px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-about .about-hero__lead h1 em {
  font-style: normal;
  color: var(--path);
}

.page-about .about-hero__lede {
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 34em;
  font-family: var(--font-body);
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.85;
  color: rgba(237, 244, 245, 0.86);
}

.page-about .about-hero__note {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--data);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  align-self: start;
  background: rgba(46, 124, 155, 0.34);
  border: 1px solid rgba(46, 124, 155, 0.34);
}

.page-about .about-fact {
  position: relative;
  padding: 16px 14px 18px;
  background: linear-gradient(162deg, var(--deep) 0%, #0a2521 100%);
}

.page-about .about-fact::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--path);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.32s var(--ease);
}

.page-about .about-fact:hover::after {
  transform: scaleX(1);
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 4.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--path);
}

.page-about .about-fact__unit {
  margin-left: 4px;
  font-size: 13px;
  color: var(--frost);
}

.page-about .about-fact__label {
  margin: 9px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--data);
}

/* ---------- 章节骨架 ---------- */
.page-about .chapter {
  position: relative;
  padding: clamp(48px, 8vw, 96px) 0;
  border-bottom: var(--rule-soft);
}

.page-about .chapter--data {
  background: linear-gradient(180deg, rgba(15, 51, 46, 0.42) 0%, rgba(7, 23, 26, 0) 70%);
}

.page-about .chapter__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-bottom: clamp(30px, 5vw, 56px);
}

.page-about .chapter__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.6vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-about .chapter__lede {
  margin: 0;
  max-width: 40em;
  font-size: clamp(14.5px, 2.1vw, 16.5px);
  line-height: 1.85;
  color: rgba(237, 244, 245, 0.76);
}

.page-about .chapter a {
  color: var(--frost);
  text-decoration: none;
  border-bottom: 1px solid rgba(143, 208, 223, 0.45);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

/* ---------- 时间线 ---------- */
.page-about .trace {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .trace__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 22px 0 22px 20px;
  border-left: 1px solid rgba(46, 124, 155, 0.34);
}

.page-about .trace__item:first-child {
  padding-top: 0;
}

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

.page-about .trace__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 28px;
  width: 7px;
  height: 7px;
  background: var(--path);
  transform: rotate(45deg);
  transition: background 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-about .trace__item:first-child::before {
  top: 6px;
}

.page-about .trace__item:hover::before {
  box-shadow: 0 0 0 4px rgba(255, 106, 26, 0.18);
}

.page-about .trace__stamp {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .trace__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 3.2vw, 27px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--path);
}

.page-about .trace__stage {
  padding: 3px 10px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--frost);
  background: rgba(46, 124, 155, 0.18);
  border-left: 2px solid var(--ice);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.page-about .trace__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16.5px, 2.6vw, 20px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.page-about .trace__body p {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(237, 244, 245, 0.72);
}

/* ---------- 数据带 ---------- */
.page-about .about-band {
  margin: 0 0 clamp(30px, 5vw, 52px);
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(46, 124, 155, 0.28);
  border: 1px solid rgba(46, 124, 155, 0.28);
}

.page-about .flow__step {
  position: relative;
  padding: 22px 18px 24px;
  background: rgba(7, 23, 26, 0.92);
  transition: background 0.24s var(--ease);
}

.page-about .flow__step:hover {
  background: rgba(23, 74, 99, 0.42);
}

.page-about .flow__idx {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--path);
}

.page-about .flow__step h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--snow);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: rgba(237, 244, 245, 0.72);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .team-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(46, 124, 155, 0.26);
  border-top: 1px solid rgba(46, 124, 155, 0.26);
}

.page-about .role {
  padding: 20px 0 22px;
  background: transparent;
  border-bottom: 1px solid rgba(46, 124, 155, 0.22);
}

.page-about .role__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--frost);
}

.page-about .role h3 {
  display: inline-block;
  margin: 0 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--snow);
  vertical-align: baseline;
}

.page-about .role p {
  margin: 12px 0 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(237, 244, 245, 0.72);
}

.page-about .team-shot {
  margin: 0;
}

.page-about .about-quote {
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--path);
}

.page-about .about-quote p {
  margin: 0;
  max-width: 36em;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(16px, 2.6vw, 21px);
  line-height: 1.68;
  letter-spacing: -0.01em;
  color: var(--frost);
}

/* ---------- 覆盖范围 ---------- */
.page-about .region-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .region-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--rule);
}

.page-about .region-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0 20px;
  border-bottom: var(--rule-soft);
}

.page-about .region-row__key {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.01em;
  color: var(--snow);
}

.page-about .region-row__val {
  display: inline-block;
  align-self: start;
  justify-self: start;
  padding: 3px 9px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--path);
  background: rgba(255, 106, 26, 0.12);
  border-left: 2px solid var(--path);
}

.page-about .region-row__note {
  font-size: 14px;
  line-height: 1.82;
  color: rgba(237, 244, 245, 0.72);
}

.page-about .region-shot {
  margin: 0;
}

/* ---------- 认可 ---------- */
.page-about .chapter--trust {
  background:
    linear-gradient(200deg, rgba(23, 74, 99, 0.34) 0%, rgba(7, 23, 26, 0) 62%);
}

.page-about .trust-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(46, 124, 155, 0.3);
  border: 1px solid rgba(46, 124, 155, 0.3);
}

.page-about .trust-card {
  position: relative;
  padding: 24px 20px 26px;
  background: linear-gradient(170deg, rgba(15, 51, 46, 0.92) 0%, rgba(7, 23, 26, 0.95) 100%);
}

.page-about .trust-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: var(--path);
}

.page-about .trust-card__tag {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--data);
}

.page-about .trust-card__figure {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-about .trust-card__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.84;
  color: rgba(237, 244, 245, 0.72);
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  position: relative;
  padding: clamp(44px, 7vw, 84px) 0 clamp(52px, 8vw, 96px);
  background: linear-gradient(90deg, rgba(15, 51, 46, 0.85) 0%, rgba(7, 23, 26, 0.95) 68%);
  border-bottom: var(--rule);
}

.page-about .about-close::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--path), rgba(255, 106, 26, 0));
}

.page-about .about-close__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .about-close__copy h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-about .about-close__copy p {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(237, 244, 245, 0.78);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .trust-band {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .region-row {
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 16px;
    align-items: baseline;
  }

  .page-about .region-row__note {
    grid-column: 1 / -1;
    margin-top: 4px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(32px, 5vw, 60px);
    align-items: end;
  }

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

  .page-about .chapter__head {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    column-gap: clamp(24px, 4vw, 48px);
    align-items: start;
  }

  .page-about .chapter__head .eyebrow {
    grid-column: 1;
    grid-row: 1 / span 2;
    padding-top: 8px;
    align-self: start;
  }

  .page-about .chapter__head h2 {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .chapter__lede {
    grid-column: 2;
    grid-row: 2;
    margin-top: 10px;
  }

  .page-about .trace__item {
    grid-template-columns: 150px minmax(0, 1fr);
    column-gap: 0;
    padding: 0 0 38px 0;
    border-left: 0;
  }

  .page-about .trace__item::before {
    left: 150px;
    top: 26px;
    margin-left: -3.5px;
  }

  .page-about .trace__item:first-child::before {
    top: 6px;
  }

  .page-about .trace__item::after {
    content: "";
    position: absolute;
    left: 150px;
    top: 36px;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, rgba(46, 124, 155, 0.45), rgba(46, 124, 155, 0.12));
    pointer-events: none;
  }

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

  .page-about .trace__item:last-child::after {
    display: none;
  }

  .page-about .trace__stamp {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-right: 28px;
  }

  .page-about .trace__body {
    padding-left: 32px;
  }

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

  .page-about .team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(28px, 4vw, 52px);
  }

  .page-about .region-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    column-gap: clamp(28px, 4vw, 52px);
  }

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

  .page-about .about-close__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(28px, 4vw, 52px);
  }

  .page-about .about-close__acts {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-fact::after,
  .page-about .trace__item::before,
  .page-about .flow__step,
  .page-about .chapter a {
    transition: none;
  }
}
<<<END>>>