.page-about {
  --about-rail-w: 118px;
  --about-aside-w: 216px;
  display: block;
  background: var(--ink-deep);
  color: var(--paper);
  font-family: var(--font-body);
}

.page-about .breadcrumb {
  padding-top: 20px;
  padding-bottom: 8px;
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  color: var(--signal-cyan);
}
.page-about .breadcrumb__sep {
  margin: 0 8px;
  color: var(--referee-yellow);
}

/* ---------- 封面 ---------- */

.page-about .about-cover {
  padding: 8px 0 0;
}
.page-about .about-cover__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--hair-yellow);
}
@media (min-width: 900px) {
  .page-about .about-cover__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: end;
    column-gap: 48px;
    padding-top: 16px;
  }
}

.page-about .about-cover__title {
  margin: 16px 0 20px;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(34px, 8.2vw, 78px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--paper);
}
.page-about .about-cover__title em {
  font-style: normal;
  color: var(--signal-cyan);
}

.page-about .about-cover__lede {
  margin: 0 0 26px;
  max-width: 46ch;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
}

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

.page-about .about-cover__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--hair-cyan);
}
.page-about .about-cover__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06) brightness(0.8);
}
.page-about .about-cover__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--hair-cyan) 1px, transparent 1px),
    linear-gradient(90deg, var(--hair-cyan) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.26;
  pointer-events: none;
}
.page-about .about-cover__cap {
  position: relative;
  z-index: 1;
  padding: 10px 14px;
  font-family: var(--font-head);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  background: var(--ink-2);
}

/* ---------- 速览带 ---------- */

.page-about .about-meta {
  background: var(--ink-2);
  border-bottom: 1px solid var(--hair-yellow);
}
.page-about .about-meta__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
}
.page-about .about-meta__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: 1 1 200px;
  padding: 18px 24px 18px 0;
}
.page-about .about-meta__item + .about-meta__item {
  padding-left: 24px;
  border-left: 1px solid var(--hair-yellow);
}
.page-about .about-meta__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 32px;
  line-height: 1;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--signal-cyan);
}
.page-about .about-meta__lab {
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-section {
  display: grid;
  grid-template-columns: 1fr;
  row-gap: 18px;
  padding: 48px 0 44px;
  border-top: 1px solid var(--hair-yellow);
}
@media (min-width: 900px) {
  .page-about .about-section {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: 34px;
    padding-top: 56px;
  }
}
@media (min-width: 1200px) {
  .page-about .about-section {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr) var(--about-aside-w);
    column-gap: 40px;
  }
}

.page-about .about-section__rail {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
@media (min-width: 900px) {
  .page-about .about-section__rail {
    flex-direction: column;
    gap: 8px;
    padding-top: 4px;
  }
}
.page-about .about-section__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--referee-yellow);
}
.page-about .about-section__tag {
  font-family: var(--font-head);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

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

.page-about .about-h2 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.008em;
  color: var(--paper);
}

.page-about .about-p {
  margin: 0 0 16px;
  max-width: 64ch;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
}
.page-about .about-p--tail {
  margin-top: 22px;
  color: var(--muted);
}

.page-about .about-section__aside {
  border-top: 1px solid var(--hair-yellow);
  padding-top: 14px;
}
@media (min-width: 1200px) {
  .page-about .about-section__aside {
    border-top: 0;
    border-left: 1px solid var(--hair-yellow);
    padding-top: 4px;
    padding-left: 22px;
  }
}
.page-about .about-aside__label {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--referee-yellow);
}
.page-about .about-aside__link {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 500;
  color: var(--signal-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-cyan);
  padding-bottom: 2px;
}
.page-about .about-aside__link:hover {
  color: var(--paper);
  border-bottom-color: var(--referee-yellow);
}
.page-about .about-aside__text {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: 12px;
  line-height: 1.8;
  color: var(--muted);
}
.page-about .about-aside__stat {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.page-about .about-aside__stat span {
  display: inline-block;
  margin-right: 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--signal-cyan);
}

/* ---------- 双栏说明 ---------- */

.page-about .about-duo {
  display: grid;
  gap: 0;
  margin-top: 26px;
}
@media (min-width: 720px) {
  .page-about .about-duo {
    grid-template-columns: 1fr 1fr;
    column-gap: 40px;
  }
}
.page-about .about-duo__item {
  padding: 22px 0 8px;
  border-top: 1px solid var(--hair-yellow);
}
.page-about .about-duo__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 500;
  color: var(--paper);
}
.page-about .about-duo__item p {
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}
.page-about .about-duo__item ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-duo__item li {
  position: relative;
  padding-left: 16px;
  font-family: var(--font-head);
  font-size: 13px;
  line-height: 1.95;
  color: var(--paper);
}
.page-about .about-duo__item li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 1px;
  background: var(--signal-cyan);
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  margin: 26px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: var(--hair-yellow);
}
.page-about .about-timeline__node {
  position: relative;
  padding: 0 0 30px;
  transition: transform var(--dur) var(--ease);
}
.page-about .about-timeline__node:last-child {
  padding-bottom: 4px;
}
.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--referee-yellow);
  background: var(--ink-deep);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .about-timeline__node:hover::before,
.page-about .about-timeline__node:focus-within::before {
  background: var(--signal-cyan);
  border-color: var(--signal-cyan);
}
@media (min-width: 900px) {
  .page-about .about-timeline__node:hover {
    transform: translateX(4px);
  }
}
.page-about .about-timeline__season {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  color: var(--signal-cyan);
}
.page-about .about-timeline__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 500;
  color: var(--paper);
}
.page-about .about-timeline__body p {
  margin: 0;
  max-width: 58ch;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 内文图 ---------- */

.page-about .about-inline-figure {
  margin: 8px auto;
  padding: 34px 0 6px;
  border-top: 1px solid var(--hair-yellow);
}
.page-about .about-inline-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--grid);
  filter: saturate(0.7) brightness(0.86);
}
.page-about .about-inline-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-head);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* ---------- 校验链 ---------- */

.page-about .about-verify {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 26px;
}
@media (min-width: 780px) {
  .page-about .about-verify {
    grid-template-columns: 1.1fr 1fr 1.15fr;
    column-gap: 28px;
  }
}
.page-about .about-verify__step {
  padding: 18px 0 6px;
  border-top: 1px solid var(--referee-yellow);
}
.page-about .about-verify__no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--referee-yellow);
}
.page-about .about-verify__step h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 500;
  color: var(--paper);
}
.page-about .about-verify__step p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  margin-top: 26px;
}
.page-about .about-team__row {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  column-gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--hair-yellow);
}
.page-about .about-team__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 44px;
  line-height: 1;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--signal-cyan);
}
.page-about .about-team__txt h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 500;
  color: var(--paper);
}
.page-about .about-team__txt p {
  margin: 0;
  max-width: 58ch;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 规模数字 ---------- */

.page-about .about-scale {
  display: flex;
  flex-wrap: wrap;
  gap: 0 40px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-scale__item {
  flex: 1 1 190px;
  padding: 18px 0 14px;
  border-top: 1px solid var(--referee-yellow);
}
.page-about .about-scale__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 5.6vw, 58px);
  line-height: 0.95;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--signal-cyan);
}
.page-about .about-scale__unit {
  margin-left: 2px;
  font-size: 0.45em;
  letter-spacing: 0.06em;
  color: var(--paper);
}
.page-about .about-scale__lab {
  display: block;
  margin-top: 10px;
  font-family: var(--font-head);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 三条做法 ---------- */

.page-about .about-values {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
@media (min-width: 860px) {
  .page-about .about-values {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 32px;
  }
}
.page-about .about-values__item {
  padding: 20px 0 8px;
  border-top: 1px solid var(--hair-yellow);
}
.page-about .about-values__mark {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--referee-yellow);
}
.page-about .about-values__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 500;
  color: var(--paper);
}
.page-about .about-values__item p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 下一步 ---------- */

.page-about .about-next {
  margin-top: 30px;
  padding: 52px 0 64px;
  background: var(--ink-2);
  border-top: 1px solid var(--hair-yellow);
}
.page-about .about-next__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
@media (min-width: 940px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    column-gap: 56px;
    align-items: start;
  }
}
.page-about .about-next__title {
  margin: 14px 0 14px;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .about-next__links {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-next__links li {
  border-top: 1px solid var(--hair-yellow);
}
.page-about .about-next__links a {
  display: block;
  padding: 18px 0;
  text-decoration: none;
  transition: transform var(--dur) var(--ease);
}
@media (min-width: 940px) {
  .page-about .about-next__links a:hover {
    transform: translateX(6px);
  }
}
.page-about .about-next__name {
  display: block;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 500;
  color: var(--signal-cyan);
}
.page-about .about-next__links a:hover .about-next__name {
  color: var(--paper);
}
.page-about .about-next__desc {
  display: block;
  margin-top: 5px;
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--muted);
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__node,
  .page-about .about-next__links a {
    transition: none;
  }
  .page-about .about-timeline__node:hover {
    transform: none;
  }
  .page-about .about-next__links a:hover {
    transform: none;
  }
}
<<<END>>>