.page-about {
  --about-rail: clamp(46px, 8vw, 64px);
  --about-gap: clamp(16px, 3vw, 24px);
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(0deg, rgba(111, 127, 119, 0.08) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, rgba(111, 127, 119, 0.08) 0 1px, transparent 1px 72px);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.page-about :where(p, h1, h2, h3, ul, ol, dl, dd, figure) {
  margin: 0;
}

.page-about :where(ul, ol) {
  list-style: none;
  padding: 0;
}

.page-about :where(a) {
  color: inherit;
}

.page-about :where(a:focus-visible) {
  outline: 1px solid var(--lime);
  outline-offset: 3px;
}

.page-about .about-wrap {
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-crumb {
  padding-block: clamp(20px, 4vw, 36px) 0;
}

.page-about .about-kicker {
  font-family: var(--font-numeric);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-inline-link {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 160ms var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--lime-soft);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-block: clamp(22px, 4vw, 40px) clamp(36px, 6vw, 72px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7.2vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin-block: 10px 0;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin-block: clamp(16px, 3vw, 24px) 0;
  max-width: 56ch;
  font-size: clamp(0.95rem, 2.4vw, 1.06rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__marks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-block-start: clamp(22px, 4vw, 34px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-mark {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 14px 12px;
  background: var(--ink);
}

.page-about .about-mark__num {
  font-family: var(--font-numeric);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.2rem, 4.6vw, 1.7rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-mark__plus {
  font-size: 0.62em;
  vertical-align: super;
  color: var(--lime-soft);
}

.page-about .about-mark__unit {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
}

.page-about .about-hero__figure {
  position: relative;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.page-about .about-hero__figure::before,
.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--lime);
  border-style: solid;
  pointer-events: none;
}

.page-about .about-hero__figure::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}

.page-about .about-hero__figure::after {
  right: -1px;
  bottom: -1px;
  border-width: 0 1px 1px 0;
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-hero__caption {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 12px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--stone);
  border-top: 1px solid var(--line);
}

.page-about .about-hero__dot {
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--ember);
}

/* ---------- 通用区块 ---------- */

.page-about .about-section {
  padding-block: clamp(40px, 6vw, 84px);
  border-top: 1px solid var(--line);
}

.page-about .about-section__head {
  display: grid;
  gap: 10px;
  max-width: 64ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-section__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.6vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-section__note {
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 呼号理念 ---------- */

.page-about .about-creed {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-creed__col {
  padding: clamp(18px, 3.4vw, 28px);
  background: var(--panel);
}

.page-about .about-creed__col--lime {
  background: var(--moss);
}

.page-about .about-creed__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.8vw, 1.3rem);
  line-height: 1.35;
  color: var(--paper);
  margin-bottom: 10px;
}

.page-about .about-creed__col p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 版本阶梯 ---------- */

.page-about .about-ladder {
  display: grid;
  gap: 0;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: var(--about-rail) minmax(0, 1fr);
  gap: clamp(10px, 2.4vw, 24px);
}

.page-about .about-step__rail {
  position: relative;
  display: flex;
  justify-content: center;
  padding-top: 12px;
}

.page-about .about-step__rail::before {
  content: "";
  position: absolute;
  top: 34px;
  bottom: -6px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
  background: var(--line-strong);
}

.page-about .about-step:last-child .about-step__rail::before {
  display: none;
}

.page-about .about-step__tag {
  position: relative;
  z-index: 1;
  font-family: var(--font-numeric);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 3px 6px;
  border-radius: 2px;
  background: var(--stone);
  color: var(--ink);
  white-space: nowrap;
}

.page-about .about-step__card {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: clamp(16px, 3vw, 24px);
  margin-bottom: clamp(12px, 2.2vw, 20px);
  box-shadow: var(--shadow);
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease);
}

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

.page-about .about-step--current .about-step__tag {
  background: var(--lime);
}

.page-about .about-step--current .about-step__card {
  border-color: rgba(198, 255, 61, 0.45);
  background: linear-gradient(180deg, rgba(198, 255, 61, 0.06), rgba(16, 22, 20, 1) 60%);
}

.page-about .about-step__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.02rem, 2.7vw, 1.24rem);
  line-height: 1.38;
  color: var(--paper);
  margin-bottom: 8px;
}

.page-about .about-step__body {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-step__note {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 流水线 ---------- */

.page-about .about-flow {
  display: grid;
  gap: 10px;
}

.page-about .about-flow__node {
  border-left: 2px solid var(--moss);
  background: var(--panel);
  padding: clamp(14px, 2.6vw, 20px);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .about-flow__node:hover,
.page-about .about-flow__node:focus-within {
  border-left-color: var(--lime);
  transform: translateY(-2px);
}

.page-about .about-flow__idx {
  font-family: var(--font-numeric);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ember);
}

.page-about .about-flow__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 3.2vw, 1.45rem);
  line-height: 1.3;
  color: var(--paper);
  margin-block: 4px 8px;
}

.page-about .about-flow__desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-flow__more {
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--stone);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 220ms var(--ease), opacity 220ms var(--ease), margin-top 220ms var(--ease);
}

.page-about .about-flow__node:hover .about-flow__more,
.page-about .about-flow__node:focus-within .about-flow__more {
  max-height: 8em;
  opacity: 1;
}

.page-about .about-flow__arrow {
  display: none;
  color: var(--lime);
}

.page-about .about-flow__figure {
  margin-top: clamp(22px, 4vw, 36px);
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-flow__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-flow__caption {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--stone);
}

.page-about .about-flow__dot {
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: 6px;
  background: var(--lime);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-team__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: clamp(14px, 3vw, 22px);
  background: var(--panel);
}

.page-about .about-team__item--total {
  background: var(--moss);
  grid-column: span 2;
}

.page-about .about-team__num {
  font-family: var(--font-numeric);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2rem, 8vw, 2.9rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-team__item--total .about-team__num {
  color: var(--lime-soft);
}

.page-about .about-team__unit {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.page-about .about-team__item--total .about-team__unit {
  color: var(--mist);
}

.page-about .about-team__desc {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

.page-about .about-team__item--total .about-team__desc {
  color: rgba(221, 229, 223, 0.85);
}

/* ---------- 指标 ---------- */

.page-about .about-metrics {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-metric {
  display: grid;
  gap: 6px;
  padding: clamp(14px, 3vw, 22px);
  background: var(--panel);
}

.page-about .about-metric__key {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.01em;
  color: var(--lime);
}

.page-about .about-metric__val {
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-metrics__foot {
  margin-top: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-eco__card {
  padding: clamp(16px, 3.2vw, 26px);
  background: var(--panel);
  border-top: 2px solid var(--moss);
  transition: border-top-color 200ms var(--ease);
}

.page-about .about-eco__card:hover {
  border-top-color: var(--ember);
}

.page-about .about-eco__label {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-about .about-eco__num {
  display: block;
  margin-block: 6px 10px;
  font-family: var(--font-numeric);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.9rem, 6.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-eco__unit {
  margin-left: 6px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--clay);
}

.page-about .about-eco__text {
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-eco__foot {
  margin-top: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 更新节奏 ---------- */

.page-about .about-scope {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-scope__item {
  padding: clamp(14px, 3vw, 22px);
  background: var(--ink);
  border-left: 1px solid var(--line);
}

.page-about .about-scope__num {
  display: block;
  font-family: var(--font-numeric);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 6vw, 2.2rem);
  font-weight: 700;
  line-height: 1.05;
  color: var(--lime);
}

.page-about .about-scope__plus {
  font-size: 0.6em;
  vertical-align: super;
  color: var(--lime-soft);
}

.page-about .about-scope__unit {
  display: block;
  margin-top: 4px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--stone);
}

.page-about .about-scope__item p {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-scope__foot {
  margin-top: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 收束 ---------- */

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

.page-about .about-close__inner {
  display: grid;
  gap: clamp(22px, 4vw, 36px);
}

.page-about .about-close__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--paper);
  margin-block: 8px 0;
}

.page-about .about-close__body {
  margin-top: 12px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .about-close__figure {
  border: 1px solid var(--line);
  background: var(--moss);
}

.page-about .about-close__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: 0.85;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .about-creed {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-flow {
    grid-template-columns: minmax(0, 1fr) 34px minmax(0, 1fr) 34px minmax(0, 1fr) 34px minmax(0, 1fr);
    gap: 0;
    align-items: stretch;
  }

  .page-about .about-flow__node {
    border-left: 1px solid var(--line);
    border-top: 2px solid var(--moss);
  }

  .page-about .about-flow__node:hover,
  .page-about .about-flow__node:focus-within {
    border-top-color: var(--lime);
    border-left-color: var(--line);
    transform: translateY(-3px);
  }

  .page-about .about-flow__arrow {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .page-about .about-close__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-about .about-team {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-team__item--total {
    grid-column: span 1;
  }

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

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__node,
  .page-about .about-flow__more,
  .page-about .about-step__card,
  .page-about .about-eco__card,
  .page-about .about-inline-link {
    transition: none;
  }

  .page-about .about-flow__node:hover,
  .page-about .about-flow__node:focus-within {
    transform: none;
  }
}
<<<END>>>