.page-about {
  --about-pad: clamp(20px, 3.4vw, 40px);
  --about-tl-pad: 26px;
  --about-tl-line: 6px;
  position: relative;
  background: var(--ink-900);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 52px) 0 clamp(44px, 7vw, 88px);
}

.page-about .about-hero__mesh {
  display: block;
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image:
    linear-gradient(to right, rgba(42, 53, 72, .7) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 53, 72, .7) 1px, transparent 1px);
  background-size: 84px 84px;
  -webkit-mask-image: radial-gradient(120% 78% at 76% 10%, #000 0%, transparent 66%);
  mask-image: radial-gradient(120% 78% at 76% 10%, #000 0%, transparent 66%);
}

.page-about .about-hero__slash {
  display: block;
  position: absolute;
  top: -16%;
  right: -20%;
  width: min(680px, 82vw);
  height: 66%;
  pointer-events: none;
  background: linear-gradient(140deg, rgba(255, 90, 31, .34), rgba(255, 138, 61, .06) 60%, transparent);
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%);
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  margin-top: clamp(26px, 5vw, 56px);
}

.page-about .about-hero__kicker {
  margin: 0;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--brand);
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 8.2vw, 80px);
  line-height: 1.04;
  letter-spacing: -.02em;
  max-width: 15em;
}

.page-about .about-hero__lead .lead {
  margin-top: 22px;
  max-width: 40em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__facts .metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__facts .metric__value {
  font-family: var(--font-num);
  font-size: clamp(30px, 6vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-hero__facts .metric__label {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mute);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

.page-about .about-index__inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-index__note {
  color: var(--mute);
}

.page-about .about-index__list {
  display: flex;
  gap: 26px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__list li {
  flex: 0 0 auto;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--mute);
  text-decoration: none;
  white-space: nowrap;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-index__list a .num {
  font-family: var(--font-num);
  font-size: 11px;
  color: var(--brand);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible,
.page-about .about-index__list a[aria-current] {
  color: var(--text);
  border-bottom-color: var(--brand);
}

/* ---------- 发展历程 ---------- */
.page-about .about-story__note {
  color: var(--mute);
}

.page-about .about-story__grid {
  display: grid;
  gap: clamp(30px, 4vw, 52px);
  margin-top: clamp(30px, 5vw, 56px);
}

.page-about .tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-tl-pad);
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: var(--about-tl-line);
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--brand), var(--violet) 58%, rgba(42, 53, 72, .2));
}

.page-about .tl__item {
  position: relative;
  padding-bottom: clamp(30px, 4.4vw, 46px);
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-tl-line) - var(--about-tl-pad));
  top: 12px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--brand);
  background: var(--ink-900);
}

.page-about .tl__item--now::before {
  background: var(--brand);
  box-shadow: 0 0 0 5px rgba(255, 90, 31, .18);
}

.page-about .tl__year {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .tl__year .num {
  font-family: var(--font-num);
  font-size: clamp(34px, 7.4vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-about .tl__item--now .tl__year .num {
  color: var(--brand);
}

.page-about .tl__note {
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--mute);
  text-transform: uppercase;
}

.page-about .tl__body .tag {
  display: inline-block;
  margin-bottom: 10px;
}

.page-about .tl__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  line-height: 1.35;
}

.page-about .tl__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mute);
  max-width: 44em;
}

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

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(30px, 5vw, 56px);
}

.page-about .about-team__text p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  max-width: 46em;
}

.page-about .about-team__text p:last-child {
  margin-bottom: 0;
  color: var(--mute);
}

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

.page-about .about-team__chart {
  padding: clamp(20px, 3vw, 30px);
  background: var(--ink-900);
  border: 1px solid var(--line);
}

.page-about .about-team__chart-title {
  margin: 0 0 22px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--mute);
}

.page-about .bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .bars__row {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}

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

.page-about .bars__track {
  position: relative;
  display: block;
  height: 8px;
  background: rgba(42, 53, 72, .55);
  overflow: hidden;
}

.page-about .bars__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--brand), var(--brand-soft));
}

.page-about .bars__row:nth-child(1) .bars__fill { width: 100%; }
.page-about .bars__row:nth-child(2) .bars__fill {
  width: 78.6%;
  background: linear-gradient(90deg, var(--aqua), #4ff0d6);
}
.page-about .bars__row:nth-child(3) .bars__fill {
  width: 64.3%;
  background: linear-gradient(90deg, var(--violet), #9c8bff);
}

.page-about .bars__value {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
}

.page-about .about-team__hint {
  margin: 22px 0 0;
  font-size: 12px;
  line-height: 1.7;
}

/* ---------- 覆盖与规模 ---------- */
.page-about .about-scale__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 40px);
  margin-top: clamp(30px, 5vw, 56px);
}

.page-about .about-scale__lead {
  padding: clamp(22px, 3vw, 34px);
}

.page-about .about-scale__lead-title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 800;
  line-height: 1.35;
}

.page-about .about-scale__lead p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .about-scale__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-scale__list li {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  align-items: baseline;
  gap: 16px;
  padding: 20px clamp(16px, 2.4vw, 24px);
  background: var(--ink-800);
}

.page-about .about-scale__list .num {
  font-family: var(--font-num);
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--aqua);
}

.page-about .about-scale__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mute);
}

.page-about .about-scale__figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
}

/* ---------- 服务理念 ---------- */
.page-about .pillars {
  list-style: none;
  margin: clamp(30px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
}

.page-about .pillars__item {
  position: relative;
  padding: clamp(24px, 3.4vw, 40px);
  background: var(--ink-900);
}

.page-about .pillars__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 46px;
  background: var(--brand);
}

.page-about .pillars__item:nth-child(2)::before { background: var(--aqua); }
.page-about .pillars__item:nth-child(3)::before { background: var(--violet); }

.page-about .pillars__item .tag {
  display: inline-block;
  margin-bottom: 14px;
}

.page-about .pillars__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 800;
  line-height: 1.35;
}

.page-about .pillars__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mute);
  max-width: 40em;
}

/* ---------- 合作生态 ---------- */
.page-about .nodes {
  list-style: none;
  margin: clamp(30px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .nodes__item {
  position: relative;
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(20, 25, 34, .95), rgba(10, 13, 18, .95));
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .nodes__item:hover,
.page-about .nodes__item:focus-within {
  border-color: rgba(255, 90, 31, .55);
  transform: translateY(-2px);
}

.page-about .nodes__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(34px, 5.4vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--brand);
}

.page-about .nodes__title {
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
}

.page-about .nodes__lead {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .nodes__more {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mute);
  transition: max-height .4s var(--ease), opacity .35s var(--ease), margin-top .35s var(--ease);
}

.page-about .nodes__item:hover .nodes__more,
.page-about .nodes__item:focus-within .nodes__more {
  max-height: 220px;
  opacity: 1;
  margin-top: 12px;
}

.page-about .honors {
  display: grid;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 44px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .honors__item {
  padding: 20px clamp(16px, 2.4vw, 26px);
  background: var(--ink-800);
}

.page-about .honors__year {
  display: block;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .honors__item p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}

/* ---------- 下一程 ---------- */
.page-about .road {
  list-style: none;
  margin: clamp(30px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  counter-reset: road;
}

.page-about .road__item {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.page-about .road__idx {
  display: block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--violet);
}

.page-about .road__item h3 {
  margin: 12px 0 10px;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  line-height: 1.35;
}

.page-about .road__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mute);
  max-width: 40em;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(46px, 7vw, 90px) 0;
}

.page-about .about-cta__box {
  position: relative;
  padding: clamp(26px, 4vw, 48px);
  border: 1px solid var(--line);
  background: linear-gradient(118deg, rgba(58, 26, 12, .85), rgba(20, 25, 34, .9) 58%, rgba(10, 13, 18, .95));
}

.page-about .about-cta__box::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -40%;
  width: min(460px, 60%);
  height: 200px;
  background: linear-gradient(120deg, rgba(255, 90, 31, .3), transparent 70%);
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-cta__title {
  position: relative;
  z-index: 1;
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.6vw, 34px);
  font-weight: 900;
  line-height: 1.28;
}

.page-about .about-cta__text {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
  max-width: 44em;
}

.page-about .about-cta__links {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 断点 ---------- */
@media (min-width: 768px) {
  .page-about .about-index__inner {
    flex-direction: row;
    align-items: center;
    gap: 28px;
  }

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

  .page-about .tl__item {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 0 28px;
  }

  .page-about .tl__year {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 0;
  }

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

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

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: end;
    gap: 40px;
  }

  .page-about .about-hero__lead {
    grid-column: 1 / span 7;
  }

  .page-about .about-hero__facts {
    grid-column: 9 / span 4;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-story__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-story__figure {
    position: sticky;
    top: calc(var(--bar) + 24px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-team__text {
    grid-column: 1 / span 1;
  }

  .page-about .about-team__figure {
    grid-column: 2 / span 1;
  }

  .page-about .about-team__chart {
    grid-column: 1 / -1;
  }

  .page-about .about-scale__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: start;
  }

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

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

  .page-about .about-cta__title {
    max-width: 22em;
  }
}

@media (min-width: 1280px) {
  .page-about .about-scale__grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.25fr);
  }
}
<<<END>>>