/* ============ 品牌历程 / 页面专属样式 ============ */
.page-about {
  --about-rail-w: 190px;
  --about-glow: 0 0 0 1px rgba(0, 229, 255, .18), inset 0 1px 0 rgba(0, 229, 255, .14);
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(36px, 6vw, 84px) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 84% 6%, rgba(255, 107, 53, .22), transparent 58%),
    radial-gradient(90% 80% at 4% 0%, rgba(0, 229, 255, .16), transparent 62%),
    linear-gradient(180deg, var(--ink-0) 0%, var(--ink-1) 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  opacity: .55;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
}

.page-about .about-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 7vw, 4.4rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: .01em;
  color: var(--white);
  text-transform: uppercase;
}

.page-about .about-hero__title span {
  display: block;
}

.page-about .about-hero__title span:last-child {
  color: var(--cyan);
}

.page-about .about-hero__lede {
  margin: 24px 0 0;
  max-width: 62ch;
  color: var(--text-dim);
  font-size: 1rem;
  line-height: 1.8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-content: start;
}

.page-about .about-fact {
  padding: 16px 14px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  background: linear-gradient(160deg, rgba(18, 48, 94, .78), rgba(6, 19, 43, .58));
  box-shadow: var(--inner-top);
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-data);
  font-size: 1.7rem;
  line-height: 1;
  color: var(--white);
}

.page-about .about-fact__num em {
  font-style: normal;
  font-size: .8125rem;
  color: var(--cyan-soft);
  margin-left: 3px;
}

.page-about .about-fact__label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--graphite);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-origin__head h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  line-height: 1.12;
  color: var(--white);
}

.page-about .about-origin__kicker {
  display: inline-block;
  margin: 14px 0 0;
  font-family: var(--font-data);
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--orange);
  border-top: 2px solid var(--line-orange);
  padding-top: 8px;
}

.page-about .about-origin__body p {
  margin: 0 0 16px;
}

.page-about .about-origin__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 阶段 ---------- */
.page-about .about-stages__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 28px;
}

.page-about .stage-rail {
  display: flex;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .stage-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex: 0 0 auto;
  min-height: 44px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  color: var(--graphite);
  font-size: .9375rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .stage-rail__link em {
  font-family: var(--font-data);
  font-style: normal;
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .stage-rail__link:hover,
.page-about .stage-rail__link:focus-visible {
  color: var(--white);
  border-color: var(--line-orange);
  background: rgba(255, 107, 53, .1);
}

.page-about .stage-rail__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .stage-track {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line-strong);
  display: grid;
  gap: 24px;
}

.page-about .stage {
  position: relative;
  margin-left: 26px;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--line-cyan);
  background: linear-gradient(155deg, rgba(18, 48, 94, .72), rgba(10, 31, 68, .42));
  box-shadow: var(--inner-top);
}

.page-about .stage::before {
  content: "";
  position: absolute;
  top: 26px;
  left: -32px;
  width: 11px;
  height: 11px;
  background: var(--ink-1);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .stage__tag {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--line-orange);
  font-family: var(--font-data);
  font-size: .6875rem;
  letter-spacing: .12em;
  color: var(--orange);
}

.page-about .stage h3 {
  margin: 14px 0 10px;
  font-family: var(--font-head);
  font-size: 1.2rem;
  line-height: 1.3;
  color: var(--white);
  letter-spacing: .01em;
}

.page-about .stage p {
  margin: 0;
  color: var(--text-dim);
  font-size: .9375rem;
  line-height: 1.75;
}

.page-about .stage p.stage__outcome {
  margin-top: 14px;
  padding-left: 13px;
  border-left: 2px solid var(--cyan);
  color: var(--cyan-soft);
  font-size: .875rem;
}

.page-about .stage__band {
  display: block;
  height: 3px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--orange), var(--cyan) 60%, transparent);
}

.page-about .stage-track > .stage:nth-child(1) .stage__band { width: 22%; }
.page-about .stage-track > .stage:nth-child(2) .stage__band { width: 46%; }
.page-about .stage-track > .stage:nth-child(3) .stage__band { width: 72%; }
.page-about .stage-track > .stage:nth-child(4) .stage__band { width: 100%; }

.page-about .about-stages__media {
  margin: 40px 0 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .donut {
  position: relative;
  width: min(260px, 78%);
  aspect-ratio: 1 / 1;
  margin: 0 auto;
}

.page-about .donut__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    var(--orange) 0 39.5%,
    var(--cyan) 39.5% 72.1%,
    var(--amber) 72.1% 100%
  );
  -webkit-mask: radial-gradient(circle at 50% 50%, transparent 0 61.5%, #000 62% 100%);
  mask: radial-gradient(circle at 50% 50%, transparent 0 61.5%, #000 62% 100%);
}

.page-about .donut__center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.page-about .donut__num {
  font-family: var(--font-data);
  font-size: 2.5rem;
  line-height: 1;
  color: var(--white);
}

.page-about .donut__unit {
  margin-top: 8px;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--graphite);
}

.page-about .donut-legend {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .donut-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: .9375rem;
  color: var(--text-dim);
}

.page-about .donut-legend b {
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 1rem;
  color: var(--white);
}

.page-about .donut-legend__dot {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
}

.page-about .donut-legend__dot--orange { background: var(--orange); }
.page-about .donut-legend__dot--cyan { background: var(--cyan); }
.page-about .donut-legend__dot--amber { background: var(--amber); }

.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .tab {
  min-height: 44px;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: .875rem;
  color: var(--graphite);
  background: rgba(18, 48, 94, .42);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .tab[aria-selected="true"] {
  color: var(--white);
  border-color: var(--line-orange);
  background: rgba(255, 107, 53, .14);
  box-shadow: var(--inner-top);
}

.page-about .tab:hover {
  color: var(--white);
  border-color: var(--line-strong);
}

.page-about .tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .tabpanel {
  padding-top: 20px;
}

.page-about .tabpanel:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .tabpanel p {
  margin: 0;
  max-width: 62ch;
  color: var(--text-dim);
  font-size: .9375rem;
  line-height: 1.8;
}

.page-about .about-team__media {
  margin: 40px 0 0;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-eco__lead {
  padding: 26px 24px;
  border-left: 3px solid var(--orange);
}

.page-about .about-eco__lead-num {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: 2.4rem;
  line-height: 1;
  color: var(--white);
}

.page-about .about-eco__lead-num span {
  margin-left: 6px;
  font-family: var(--font-body);
  font-size: .9375rem;
  color: var(--graphite);
}

.page-about .about-eco__lead p:not(.about-eco__lead-num) {
  margin: 0;
  color: var(--text-dim);
  font-size: .9375rem;
  line-height: 1.8;
}

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

.page-about .about-eco__list li {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-eco__list h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  letter-spacing: .02em;
  color: var(--cyan-soft);
}

.page-about .about-eco__list p {
  margin: 0;
  color: var(--text-dim);
  font-size: .9375rem;
  line-height: 1.75;
}

/* ---------- 内容标准 ---------- */
.page-about .std-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .std-flow__item {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 48, 94, .55), rgba(10, 31, 68, .28));
}

.page-about .std-flow__idx {
  display: block;
  font-family: var(--font-data);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--orange);
}

.page-about .std-flow__item h3 {
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  color: var(--white);
}

.page-about .std-flow__item p {
  margin: 0;
  color: var(--text-dim);
  font-size: .875rem;
  line-height: 1.8;
}

.page-about .about-standard__note {
  margin-top: 28px;
  padding: 24px 22px;
  border-left: 3px solid var(--cyan);
}

.page-about .about-standard__note p {
  margin: 0;
  max-width: 74ch;
  color: var(--text-dim);
  font-size: .9375rem;
  line-height: 1.8;
}

/* ---------- 荣誉 ---------- */
.page-about .about-awards__media {
  margin: 0 0 32px;
}

.page-about .award-plates {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .plate {
  position: relative;
  padding: 30px 22px 24px;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(160deg, rgba(255, 179, 71, .1), transparent 62%),
    linear-gradient(180deg, rgba(18, 48, 94, .62), rgba(10, 31, 68, .34));
  box-shadow: var(--inner-top);
}

.page-about .plate__coord {
  position: absolute;
  top: 9px;
  right: 12px;
  font-family: var(--font-data);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--graphite);
}

.page-about .plate h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  color: var(--white);
  letter-spacing: .01em;
}

.page-about .plate__count {
  margin: 8px 0 12px;
  font-family: var(--font-data);
  font-size: 1.9rem;
  line-height: 1;
  color: var(--amber);
}

.page-about .plate p {
  margin: 0;
  color: var(--text-dim);
  font-size: .875rem;
  line-height: 1.75;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(44px, 6vw, 84px) 0 clamp(56px, 8vw, 96px);
}

.page-about .about-cta__box {
  position: relative;
  padding: clamp(28px, 5vw, 54px);
  border: 1px solid var(--line-orange);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(255, 107, 53, .2), transparent 62%),
    radial-gradient(70% 100% at 0% 100%, rgba(0, 229, 255, .12), transparent 60%),
    linear-gradient(150deg, rgba(18, 48, 94, .92), rgba(6, 19, 43, .86));
  overflow: hidden;
}

.page-about .about-cta__box h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  line-height: 1.16;
  color: var(--white);
}

.page-about .about-cta__box p {
  margin: 0 0 26px;
  max-width: 62ch;
  color: var(--text-dim);
  font-size: .9375rem;
  line-height: 1.8;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-eco__list li {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 52px;
    align-items: center;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-about .std-flow__item {
    border-right: 0;
  }

  .page-about .std-flow__item:last-child {
    border-right: 1px solid var(--line);
  }

  .page-about .std-flow__item::after {
    content: "";
    position: absolute;
    top: 32px;
    right: -5px;
    width: 9px;
    height: 9px;
    background: var(--ink-1);
    border: 1px solid var(--cyan);
    transform: rotate(45deg);
    z-index: 1;
  }

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

  .page-about .award-plates {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-stages__layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .stage-rail {
    position: sticky;
    top: 138px;
    flex-direction: column;
    overflow: visible;
    gap: 2px;
  }

  .page-about .stage-rail__link {
    border: 0;
    border-left: 2px solid var(--line);
    padding: 12px 0 12px 16px;
    background: none;
  }

  .page-about .stage-rail__link:hover,
  .page-about .stage-rail__link:focus-visible {
    background: none;
    border-left-color: var(--orange);
  }

  .page-about .stage {
    padding: 26px 28px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .stage-rail__link,
  .page-about .tab {
    transition: none;
  }
}
<<<END>>>