.page-about {
  --about-gap: clamp(1.5rem, 4vw, 3.25rem);
  --about-pad: clamp(2.5rem, 6vw, 5rem);
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.75;
}

.page-about .breadcrumbs {
  padding-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3rem) 0 var(--about-pad);
  background:
    radial-gradient(120% 90% at 85% 0%, rgba(255, 106, 42, 0.18) 0%, rgba(7, 21, 40, 0) 55%),
    linear-gradient(180deg, rgba(18, 58, 94, 0.9) 0%, rgba(11, 30, 58, 0.55) 45%, rgba(7, 21, 40, 0) 72%),
    repeating-linear-gradient(90deg, rgba(76, 155, 232, 0.09) 0 1px, transparent 1px 104px);
  border-bottom: var(--edge);
}

.page-about .about-hero__inner {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 1rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange-soft);
  border-left: 3px solid var(--orange);
  padding-left: 0.6rem;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin: 1.25rem 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.1vw, 1.0625rem);
  color: var(--mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stat {
  border-left: 3px solid var(--teal);
  padding-left: 0.75rem;
}

.page-about .about-hero__stat b {
  display: block;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  line-height: 1.15;
  color: var(--paper);
}

.page-about .about-hero__stat span {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.8125rem;
  color: var(--mist);
  letter-spacing: 0.04em;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 14 / 9;
  border: var(--edge);
  box-shadow: var(--shadow-hard);
  background: repeating-linear-gradient(135deg, var(--ink-700) 0 8px, var(--ink-800) 8px 16px);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 64px;
  height: 64px;
  background: linear-gradient(225deg, var(--orange) 0 50%, transparent 50%);
  pointer-events: none;
}

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

/* ---------- 品牌轨道 ---------- */
.page-about .about-rail {
  padding: var(--about-pad) 0;
  background: var(--ink-800);
  border-bottom: var(--edge);
}

.page-about .about-rail__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-rail__index {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--teal);
}

.page-about .about-rail__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-rail__body p {
  margin: 0 0 1rem;
  color: var(--mist);
  font-size: 1rem;
}

.page-about .about-rail__body p:first-child {
  color: var(--paper);
}

.page-about .about-rail__plates {
  display: grid;
  gap: 1rem;
  margin-top: 1.75rem;
}

.page-about .plate {
  border: 2px solid var(--ink-700);
  border-radius: var(--radius);
  background: var(--ink-900);
  box-shadow: 6px 6px 0 rgba(3, 12, 24, 0.55);
  padding: 1.1rem 1.15rem 1.25rem;
}

.page-about .about-rail__plate .plate__tag {
  margin: 0 0 0.6rem;
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--orange-soft);
  text-transform: uppercase;
}

.page-about .about-rail__plate .plate__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-rail__plate .plate__text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  padding: var(--about-pad) 0;
  background: var(--ink-900);
  border-bottom: var(--edge);
}

.page-about .about-timeline__tabs {
  margin-top: 2rem;
}

.page-about .about-timeline .tabs__list {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.6rem;
  scrollbar-width: thin;
  border-bottom: 1px solid var(--ink-600);
}

.page-about .about-timeline .tabs__tab {
  flex: 0 0 auto;
  padding: 0.55rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--mist);
  background: var(--ink-800);
  border: 2px solid var(--ink-600);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 240ms var(--ease), color 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .about-timeline .tabs__tab:hover {
  border-color: var(--orange-soft);
  color: var(--paper);
}

.page-about .about-timeline .tabs__tab[aria-selected="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-900);
  font-weight: 700;
}

.page-about .about-timeline .tabs__tab:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 2px;
}

.page-about [role="tabpanel"][hidden] {
  display: none;
}

.page-about .about-stage {
  margin-top: 1.5rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--ink-800);
  border: var(--edge);
  border-left: 6px solid var(--orange);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  animation: about-fade 240ms var(--ease) both;
}

@keyframes about-fade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-about .about-stage__year {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--teal);
}

.page-about .about-stage__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  font-weight: 800;
  line-height: 1.28;
  color: var(--paper);
}

.page-about .about-stage__text {
  margin: 0;
  max-width: 62ch;
  color: var(--mist);
}

.page-about .about-stage__points {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.page-about .about-stage__points li {
  position: relative;
  padding-left: 1.35rem;
  font-size: 0.9375rem;
  color: var(--paper);
}

.page-about .about-stage__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--teal);
  border-radius: 50%;
}

.page-about .about-timeline__figure {
  margin: 2rem 0 0;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-pad) 0;
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
  border-bottom: var(--edge);
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-team__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-team__lead {
  margin: 1rem 0 0;
  max-width: 52ch;
  color: var(--mist);
}

.page-about .about-team__roles {
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-team__role {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  column-gap: 1rem;
  row-gap: 0.15rem;
  align-items: baseline;
  padding-top: 0.85rem;
  border-top: 1px solid var(--ink-600);
}

.page-about .about-team__count {
  grid-row: 1 / span 2;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .about-team__name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-team__note {
  margin: 1.5rem 0 0;
  padding: 0.9rem 1rem;
  font-size: 0.875rem;
  color: var(--paper);
  background: rgba(34, 211, 182, 0.08);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
}

/* ---------- 质量保障 ---------- */
.page-about .about-quality {
  padding: var(--about-pad) 0;
  background: var(--ink-900);
  border-bottom: var(--edge);
}

.page-about .about-quality__list {
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--ink-600);
  border: 2px solid var(--ink-600);
  border-radius: var(--radius);
}

.page-about .about-quality__item {
  background: var(--ink-800);
  padding: clamp(1rem, 2.5vw, 1.5rem);
}

.page-about .about-quality__num {
  margin: 0 0 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.page-about .about-quality__title {
  margin: 0 0 0.45rem;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-quality__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-quality__foot {
  margin: 1.5rem 0 0;
  padding-left: 0.9rem;
  border-left: 3px solid var(--orange);
  font-size: 0.9375rem;
  color: var(--paper);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  padding: var(--about-pad) 0 clamp(2rem, 5vw, 3.5rem);
  background: var(--ink-800);
  border-bottom: var(--edge);
}

.page-about .about-eco__scroller {
  overflow-x: auto;
  padding: 1.5rem var(--gutter) 1.5rem;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
}

.page-about .about-eco__track {
  display: flex;
  gap: 1rem;
  width: max-content;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco__card {
  flex: 0 0 auto;
  width: min(76vw, 280px);
  scroll-snap-align: start;
  padding: 1.25rem;
  background: var(--ink-900);
  border: 2px solid var(--ink-700);
  border-top: 4px solid var(--teal);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 rgba(3, 12, 24, 0.55);
}

.page-about .about-eco__card--award {
  border-top-color: var(--orange);
}

.page-about .about-eco__value {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .about-eco__label {
  margin: 0.5rem 0 0.5rem;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-eco__text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: var(--about-pad) 0;
  background:
    radial-gradient(100% 120% at 0% 0%, rgba(255, 106, 42, 0.16) 0%, rgba(7, 21, 40, 0) 60%),
    var(--ink-900);
}

.page-about .about-next__inner {
  display: grid;
  gap: 1.25rem;
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-next__lead {
  margin: 0;
  max-width: 56ch;
  color: var(--mist);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

.page-about .about-next__links .btn {
  font-family: var(--font-body);
  font-weight: 700;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-rail__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-about .about-rail__aside {
    position: sticky;
    top: 6.5rem;
    align-self: start;
  }

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

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

@media (min-width: 1100px) {
  .page-about .about-eco__card {
    width: 300px;
  }
}

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

  .page-about .about-timeline .tabs__tab {
    transition: none;
  }
}
<<<END>>>