.page-about {
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(90% 70% at 88% 0%, rgba(23, 61, 51, 0.95) 0%, rgba(11, 15, 14, 0) 62%),
    radial-gradient(70% 60% at 0% 100%, rgba(200, 255, 61, 0.09) 0%, rgba(11, 15, 14, 0) 70%),
    var(--ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

.page-about .about-hero__grid {
  align-items: start;
  margin-top: clamp(1.5rem, 4vw, 2.75rem);
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-hero__meta {
  color: var(--lime);
}

.page-about .about-hero__title {
  margin: 0.9rem 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.3rem, 7.5vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.01em;
}

.page-about .about-hero__title span {
  display: block;
  color: var(--lime);
}

.page-about .about-hero__lede {
  margin: 1.25rem 0 0;
  max-width: 46ch;
  font-size: clamp(0.98rem, 1.3vw, 1.08rem);
  line-height: 1.9;
  color: var(--white-78);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding-top: 1.35rem;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__facts dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-hero__facts dd {
  margin: 0.35rem 0 0;
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  line-height: 1.1;
  color: var(--white);
}

.page-about .about-hero__figure {
  min-width: 0;
}

.page-about .about-hero__frame {
  --frame-ratio: 4 / 5;
}

/* ---------- 章节导航 ---------- */
.page-about .about-chapters {
  position: sticky;
  top: 66px;
  z-index: 30;
  background: rgba(11, 15, 14, 0.76);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-chapters__list {
  display: flex;
  gap: 0.2rem;
  margin: 0;
  padding: 0.4rem 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-chapters__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.42rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s, background 0.25s, border-color 0.25s;
}

.page-about .about-chapters__list a:hover,
.page-about .about-chapters__list a:focus-visible {
  color: var(--white);
  background: var(--glass-bg);
  border-color: var(--line-strong);
}

.page-about .about-chapters__list .num {
  font-size: 0.7rem;
  color: var(--lime);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: clamp(3rem, 7vw, 6rem) 0;
  border-top: 1px solid rgba(183, 244, 224, 0.07);
}

.page-about .about-chapter--cadence {
  background: linear-gradient(180deg, rgba(14, 42, 34, 0.55) 0%, rgba(11, 15, 14, 0) 78%);
}

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: clamp(0.75rem, 2vw, 1.6rem);
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-chapter__index {
  display: block;
  font-size: clamp(2.4rem, 7vw, 4.8rem);
  line-height: 0.82;
  color: rgba(183, 244, 224, 0.17);
}

.page-about .about-chapter__headtext {
  min-width: 0;
}

.page-about .about-chapter .section-title {
  margin: 0.5rem 0 0;
  font-size: clamp(1.7rem, 4.2vw, 2.9rem);
  line-height: 1.14;
}

.page-about .about-chapter .section-lede {
  margin-top: 0.85rem;
  max-width: 54ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 01 缘起 ---------- */
.page-about .about-origin__grid {
  align-items: start;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.page-about .about-origin__prose p {
  line-height: 1.95;
  color: var(--white-78);
}

.page-about .about-origin__card {
  padding: clamp(1.2rem, 3vw, 1.7rem);
  border-radius: var(--radius-sm);
}

.page-about .about-origin__name {
  margin: 0.4rem 0 1.1rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  color: var(--white);
}

.page-about .about-origin__card dl {
  display: grid;
  gap: 0.7rem;
  margin: 0;
}

.page-about .about-origin__card dl div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
}

.page-about .about-origin__card dt {
  color: var(--mist);
  flex: 0 0 auto;
}

.page-about .about-origin__card dd {
  margin: 0;
  font-family: var(--font-mono);
  color: var(--white);
  text-align: right;
  word-break: break-word;
}

/* ---------- 02 场景 ---------- */
.page-about .about-scenes {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-scene {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.3rem 0.9rem;
  padding: clamp(1.1rem, 2.6vw, 1.7rem) 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-scene__no {
  grid-column: 1;
  padding-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--steel);
}

.page-about .about-scene__title {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.6vw, 1.55rem);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-scene__desc {
  grid-column: 2;
  margin: 0.3rem 0 0;
  max-width: 50ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-scene__tag {
  grid-column: 2;
  justify-self: start;
  margin-top: 0.45rem;
}

/* ---------- 03 运营节奏 ---------- */
.page-about .about-ops {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: start;
}

.page-about .about-ops__figure {
  --frame-ratio: 14 / 9;
  margin: 0;
}

.page-about .about-ops__lead {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--white-78);
  max-width: 56ch;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.5rem;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-stat {
  padding: 0.85rem 0.95rem 0.95rem;
  background: var(--ink-2);
}

.page-about .about-stat .num {
  display: block;
  font-size: clamp(1.45rem, 3.2vw, 2.05rem);
  line-height: 1.1;
  color: var(--white);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.76rem;
  color: var(--mist);
  letter-spacing: 0.03em;
}

.page-about .about-stat--accent {
  background: rgba(200, 255, 61, 0.09);
}

.page-about .about-stat--accent .num {
  color: var(--lime);
}

.page-about .about-flow {
  display: grid;
  gap: 1.05rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow li {
  display: grid;
  grid-template-columns: 1.6rem minmax(0, 1fr);
  gap: 0.7rem;
  align-items: start;
}

.page-about .about-flow__step {
  padding-top: 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--orange);
}

.page-about .about-flow__title {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-flow__desc {
  margin: 0.22rem 0 0;
  font-size: 0.87rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-ops__more {
  margin: 1.6rem 0 0;
  font-size: 0.86rem;
  color: var(--mist);
}

.page-about .about-inline-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.42);
  padding-bottom: 1px;
}

.page-about .about-inline-link:hover {
  border-bottom-color: var(--lime);
}

/* ---------- 04 时间线 ---------- */
.page-about .about-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-milestone {
  position: relative;
  padding: 0 0 clamp(1.5rem, 3vw, 2.1rem) 2.5rem;
}

.page-about .about-milestone:last-child {
  padding-bottom: 0;
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 1.35rem;
  bottom: 0;
  width: 1px;
  background: rgba(183, 244, 224, 0.16);
}

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

.page-about .about-milestone::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--ink);
  transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
}

.page-about .about-milestone:hover::after {
  border-color: var(--lime);
}

.page-about .about-milestone--now::after {
  border-color: var(--lime);
  background: var(--lime);
  box-shadow: 0 0 0 6px rgba(200, 255, 61, 0.12);
}

.page-about .about-milestone__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-milestone--now .about-milestone__year {
  color: var(--lime);
}

.page-about .about-milestone__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-milestone__desc {
  margin: 0.35rem 0 0;
  max-width: 52ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 05 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: start;
}

.page-about .about-nodes {
  display: grid;
  gap: 0.75rem;
}

.page-about .about-node {
  padding: 1rem 1.05rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: linear-gradient(155deg, rgba(23, 61, 51, 0.72) 0%, rgba(11, 15, 14, 0.55) 100%);
  transition: border-color 0.3s, transform 0.3s, background 0.3s;
}

.page-about .about-node:hover,
.page-about .about-node:focus-within {
  border-color: rgba(200, 255, 61, 0.55);
  transform: translateY(-2px);
  background: linear-gradient(155deg, rgba(23, 61, 51, 0.92) 0%, rgba(11, 15, 14, 0.6) 100%);
}

.page-about .about-node__num {
  display: block;
  font-size: clamp(1.6rem, 3.4vw, 2rem);
  line-height: 1;
  color: var(--lime);
}

.page-about .about-node__title {
  margin: 0.5rem 0 0;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-node__desc {
  margin: 0.35rem 0 0;
  font-size: 0.84rem;
  line-height: 1.72;
  color: var(--mist);
  transition: color 0.3s;
}

.page-about .about-node:hover .about-node__desc {
  color: var(--white-78);
}

.page-about .about-partners {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.page-about .about-partners__text {
  margin: 0.55rem 0 0;
  max-width: 56ch;
  font-size: 0.9rem;
  line-height: 1.82;
  color: var(--white-78);
}

.page-about .about-traffic {
  margin-top: 1.5rem;
  padding: clamp(1rem, 2.4vw, 1.35rem);
  border-left: 2px solid var(--gold);
  background: rgba(242, 184, 75, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .about-traffic__list {
  display: flex;
  flex-wrap: wrap;
  gap: 1.35rem;
  margin: 0.7rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-traffic__list li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.78rem;
  color: var(--mist);
}

.page-about .about-traffic__list .num {
  font-size: 1.15rem;
  color: var(--gold);
}

.page-about .about-team__figure {
  --frame-ratio: 3 / 2;
  margin: 0;
}

/* ---------- 06 服务方式 ---------- */
.page-about .about-reach {
  display: grid;
  gap: clamp(1.4rem, 3vw, 2rem);
  padding: clamp(1.35rem, 4vw, 2.75rem);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
}

.page-about .about-reach .section-title {
  margin: 0.5rem 0 0;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  line-height: 1.15;
}

.page-about .about-reach__lede {
  margin: 0.85rem 0 0;
  max-width: 52ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--white-78);
}

.page-about .about-reach__list {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 1.25rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-reach__list li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.page-about .about-reach__value {
  font-size: 0.95rem;
  color: var(--white);
  word-break: break-word;
}

.page-about .about-reach__action {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
}

.page-about .about-reach__hint {
  font-size: 0.78rem;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-reach__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.15rem 1.5rem;
  }
}

@media (min-width: 720px) {
  .page-about .about-nodes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-team__figure {
    --frame-ratio: 12 / 7;
  }
}

@media (min-width: 860px) {
  .page-about .about-scene {
    grid-template-columns: 3rem minmax(0, 15rem) minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 1.5rem;
  }

  .page-about .about-scene__no {
    grid-column: 1;
    padding-top: 0;
  }

  .page-about .about-scene__title {
    grid-column: 2;
  }

  .page-about .about-scene__desc {
    grid-column: 3;
    margin-top: 0;
  }

  .page-about .about-scene__tag {
    grid-column: 4;
    justify-self: end;
    margin-top: 0;
  }

  .page-about .about-ops {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-about .about-milestone {
    display: grid;
    grid-template-columns: 6.5rem minmax(0, 1fr);
    gap: 1.35rem;
    padding-left: 3rem;
  }

  .page-about .about-milestone::after {
    top: 0.3rem;
  }

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

  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-reach__list {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-left: clamp(1rem, 2.5vw, 1.75rem);
  }

  .page-about .about-reach__action {
    grid-column: 1 / -1;
    padding-top: 1.25rem;
    border-top: 1px solid var(--line);
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    align-items: end;
  }

  .page-about .about-hero__figure {
    margin-top: -1.25rem;
  }

  .page-about .about-chapters {
    top: 74px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-chapters__list a,
  .page-about .about-node,
  .page-about .about-node__desc,
  .page-about .about-milestone::after {
    transition-duration: 0.01ms;
  }

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