.page-about {
  --about-soft: rgba(7, 28, 21, .66);
  --about-halo: rgba(0, 230, 184, .13);
  --about-edge: rgba(0, 230, 184, .28);
  display: block;
  color: var(--ivory);
}

/* ============ 面包屑与首屏 ============ */
.page-about .breadcrumb {
  padding: 20px 0 6px;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 52px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  left: -12%;
  width: 72%;
  height: 120%;
  background: radial-gradient(ellipse at 34% 34%, var(--about-halo), transparent 66%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 30px;
  align-items: center;
}

.page-about .about-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--orange);
  vertical-align: middle;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(32px, 7.2vw, 66px);
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 800;
  max-width: 16ch;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.9;
  max-width: 48ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--panel);
  box-shadow: var(--shadow-deep);
}

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

.page-about .about-hero__figure figcaption {
  padding: 12px 18px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ============ 章节索引 ============ */
.page-about .about-index {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px 0 18px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-index__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-index__link {
  display: inline-block;
  white-space: nowrap;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--ivory);
  border-color: var(--cyan);
  background: rgba(0, 230, 184, .09);
}

/* ============ 通用区块 ============ */
.page-about .about-block {
  padding: 52px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-block__head {
  margin-bottom: 26px;
}

.page-about .about-block__head h2 {
  margin: 10px 0 0;
  font-size: clamp(25px, 4.4vw, 42px);
  line-height: 1.14;
  letter-spacing: -.015em;
  font-weight: 800;
  max-width: 20ch;
}

.page-about .about-block__lede {
  margin: 16px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.9;
  max-width: 56ch;
}

.page-about .about-cap {
  display: block;
  padding: 12px 16px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ============ 品牌起点 ============ */
.page-about .about-origin__grid {
  display: grid;
  gap: 22px;
}

.page-about .about-origin__year {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .year-num {
  font-family: var(--font-mono);
  font-size: clamp(66px, 15vw, 118px);
  line-height: .82;
  letter-spacing: -.05em;
  font-weight: 700;
  color: rgba(0, 230, 184, .16);
  -webkit-text-stroke: 1.4px var(--cyan);
}

.page-about .year-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--mint);
}

.page-about .about-origin__body h2 {
  margin: 0 0 16px;
  font-size: clamp(23px, 3.8vw, 34px);
  line-height: 1.2;
  font-weight: 800;
}

.page-about .about-origin__body p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.92;
  color: #D7EBE2;
}

.page-about .about-note {
  margin: 22px 0 0;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--cyan);
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.85;
}

.page-about .about-note p {
  margin: 0;
}

/* ============ 三条主线 ============ */
.page-about .line-grid {
  display: grid;
  gap: 14px;
}

.page-about .line-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, rgba(10, 36, 27, .92), rgba(7, 28, 21, .48));
}

.page-about .line-panel__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .line-panel h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .line-panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.88;
  color: var(--mist);
}

.page-about .line-panel__link {
  margin-top: auto;
  font-size: 13px;
  font-weight: 600;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(140, 255, 228, .35);
  align-self: flex-start;
  padding-bottom: 2px;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .line-panel__link:hover,
.page-about .line-panel__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ============ 编辑部分工 ============ */
.page-about .desk-grid {
  display: grid;
  gap: 22px;
}

.page-about .about-desk__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}

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

.page-about .desk-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--about-soft);
  overflow: hidden;
}

.page-about .desk-item + .desk-item {
  margin-top: 10px;
}

.page-about .desk-item__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .desk-item__sum::-webkit-details-marker {
  display: none;
}

.page-about .desk-item__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .desk-item[open] .desk-item__sum::after {
  content: "–";
}

.page-about .desk-item__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ivory);
}

.page-about .desk-item__brief {
  font-size: 12.5px;
  color: var(--mist);
}

.page-about .desk-item__body {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.88;
  color: var(--mist);
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-about .verify {
  margin-top: 34px;
  padding: 24px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(200deg, rgba(0, 230, 184, .07), rgba(7, 28, 21, .5) 62%);
}

.page-about .verify__title {
  margin: 0 0 20px;
  font-size: clamp(17px, 2.8vw, 22px);
  line-height: 1.4;
  font-weight: 700;
  max-width: 30ch;
}

.page-about .verify-flow {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .verify-step {
  position: relative;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.page-about .verify-step::before {
  content: "";
  position: absolute;
  top: 5px;
  left: -4px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .verify-step__n {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .verify-step strong {
  display: block;
  margin: 6px 0 6px;
  font-size: 15px;
  color: var(--ivory);
}

.page-about .verify-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.82;
  color: var(--mist);
}

/* ============ 版本时间线 ============ */
.page-about .about-timeline__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-timeline__filter {
  margin-bottom: 20px;
}

.page-about .tl {
  display: grid;
}

.page-about .tl-item {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .tl-item__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 4vw, 27px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .tl-item__body h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
}

.page-about .tl-item__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.88;
  color: var(--mist);
}

.page-about .about-timeline__aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-timeline__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}

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

.page-about .about-timeline__note {
  margin: 0;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: var(--about-soft);
  border: 1px dashed rgba(0, 230, 184, .22);
  font-size: 13px;
  line-height: 1.85;
  color: var(--mist);
}

/* ============ 覆盖与用户 ============ */
.page-about .reach-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .reach-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(7, 28, 21, .55);
}

.page-about .reach-stat--lead {
  grid-column: 1 / -1;
  background: linear-gradient(130deg, rgba(0, 230, 184, .16), rgba(7, 28, 21, .8) 64%);
  border-color: var(--about-edge);
}

.page-about .reach-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6.4vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ivory);
  font-variant-numeric: tabular-nums;
}

.page-about .reach-stat--lead .reach-stat__num {
  font-size: clamp(44px, 10vw, 76px);
  color: var(--mint);
}

.page-about .reach-stat__unit {
  margin-left: 2px;
  font-size: .42em;
  font-weight: 500;
  color: var(--mist);
}

.page-about .reach-stat__label {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .reach-stat--soft {
  background: transparent;
  border-style: dashed;
}

.page-about .reach-stat--soft .reach-stat__num {
  color: var(--cyan);
}

/* ============ 合作生态 ============ */
.page-about .eco-grid {
  display: grid;
  gap: 26px;
}

.page-about .eco-list {
  border-top: 1px solid var(--line);
}

.page-about .eco-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .eco-row__name {
  font-size: 14.5px;
  color: var(--mist);
}

.page-about .eco-row__value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}

.page-about .eco-service {
  padding: 22px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--about-soft);
}

.page-about .eco-service h3 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 800;
}

.page-about .eco-service p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.88;
  color: var(--mist);
}

.page-about .eco-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* ============ 收束 CTA ============ */
.page-about .about-cta {
  padding: 8px 0 60px;
}

.page-about .about-cta__inner {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 22px;
  padding: 30px 22px 32px;
  border: 1px solid var(--about-edge);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(0, 230, 184, .18), rgba(7, 28, 21, .92) 58%);
}

.page-about .about-cta__copy h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -.015em;
  max-width: 18ch;
}

.page-about .about-cta__copy p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--mist);
  max-width: 46ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-self: center;
}

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

  .page-about .reach-stat--lead {
    grid-column: span 2;
  }

  .page-about .reach-stat--soft {
    grid-column: span 2;
  }

  .page-about .list-only {
    display: block;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero {
    padding: 40px 0 68px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 52px;
  }

  .page-about .about-hero__lede {
    font-size: 16px;
  }

  .page-about .about-block {
    padding: 76px 0;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .line-grid {
    grid-template-columns: 1.15fr 1fr 1fr;
    gap: 18px;
  }

  .page-about .line-panel--offset {
    margin-top: 26px;
  }

  .page-about .desk-grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: 36px;
    align-items: start;
  }

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

  .page-about .verify-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-timeline__aside {
    position: sticky;
    top: 96px;
  }

  .page-about .tl-item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 32px;
    padding: 26px 0;
  }

  .page-about .eco-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 42px 44px;
  }

  .page-about .about-cta {
    padding-bottom: 84px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero h1 {
    max-width: 15ch;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .line-panel__link {
    transition: none;
  }
}
<<<END>>>