.page-about {
  --ab-text: #c9dbe3;
  --ab-rail-w: 240px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: 8px 0 20px;
}

.page-about .ab-hero__ghost {
  position: absolute;
  top: -0.22em;
  right: -0.05em;
  font-family: var(--font-mono);
  font-size: clamp(140px, 30vw, 280px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.06em;
  color: rgba(47, 182, 196, 0.07);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  align-items: start;
  padding-top: 8px;
}

.page-about .ab-hero__lead {
  min-width: 0;
}

.page-about .ab-hero .kicker {
  margin: 0 0 14px;
}

.page-about .ab-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(31px, 6.2vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--frost);
  margin: 0 0 20px;
  max-width: 15em;
}

.page-about .ab-hero__text {
  margin: 0;
  max-width: 46em;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--ab-text);
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .ab-hero__stats .anchor-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.page-about .ab-hero__stats .anchor-block__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .ab-hero__stats .anchor-block__text {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

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

.page-about .figure__media {
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(140deg, #0c2431 0%, #10303f 58%, #0a2029 100%);
}

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

.page-about .figure__caption {
  margin-top: 10px;
}

/* ---------- 主体两栏：左刻度 + 右内容 ---------- */
.page-about .ab-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-top: 56px;
  padding-bottom: 88px;
}

.page-about .ab-scale {
  display: none;
}

.page-about .ab-scale__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: relative;
}

.page-about .ab-scale__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}

.page-about .ab-scale__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  line-height: 1.2;
}

.page-about .ab-scale__link::before {
  content: "";
  flex: none;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  box-sizing: border-box;
  background: var(--ink);
  border: 1px solid var(--line);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .ab-scale__link span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .ab-scale__link em {
  font-style: normal;
  font-size: 12px;
  color: var(--mist);
}

.page-about .ab-scale__link:hover::before,
.page-about .ab-scale__link:focus-visible::before {
  background: var(--lake);
  border-color: var(--lake);
}

.page-about .ab-scale__link:hover em,
.page-about .ab-scale__link:focus-visible em {
  color: var(--frost);
}

.page-about .ab-flow {
  display: flex;
  flex-direction: column;
  gap: 84px;
  min-width: 0;
}

.page-about .ab-section {
  min-width: 0;
}

.page-about .ab-section .section__sub {
  margin-top: 10px;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .ab-section .bento {
  margin-top: 28px;
  row-gap: 18px;
}

.page-about .ab-bento--top {
  margin-top: 20px !important;
}

/* ---------- 面板与说明牌 ---------- */
.page-about .ab-panel {
  min-width: 0;
  padding: 22px 20px;
}

.page-about .ab-panel p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ab-text);
}

.page-about .ab-panel p:last-child {
  margin-bottom: 0;
}

.page-about .ab-panel a {
  color: var(--lake);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-anchor {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
  padding: 24px 22px;
  border-radius: var(--radius-md);
  background: linear-gradient(150deg, rgba(242, 169, 59, 0.14), rgba(16, 48, 63, 0.6));
  border: 1px solid rgba(242, 169, 59, 0.32);
}

.page-about .ab-anchor .anchor-block__num {
  font-family: var(--font-mono);
  font-size: clamp(44px, 8vw, 64px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--amber);
}

.page-about .ab-anchor .anchor-block__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ab-text);
}

.page-about .ab-plate {
  min-width: 0;
  padding: 22px 20px;
  border-radius: var(--radius-md);
}

.page-about .ab-plate__link {
  margin: 14px 0 0;
  font-size: 14px;
}

.page-about .ab-plate__link a {
  color: var(--lake);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-figure {
  margin: 0;
  min-width: 0;
}

/* ---------- 季度方阵 ---------- */
.page-about .ab-quarters {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .ab-quarters li {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
}

.page-about .ab-quarters strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--lake);
}

.page-about .ab-quarters span {
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ab-text);
}

/* ---------- 帮助中心对照 ---------- */
.page-about .ab-compare {
  margin-top: 26px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .ab-compare .compare__col {
  min-width: 0;
  padding: 20px 22px;
  border-radius: var(--radius-md);
}

.page-about .ab-compare .compare__col--old {
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed var(--line);
}

.page-about .ab-compare .compare__col--new {
  background: var(--deep);
  border: 1px solid rgba(47, 182, 196, 0.42);
}

.page-about .ab-compare .compare__head {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .ab-compare .compare__col--new .compare__head {
  color: var(--lake);
}

.page-about .ab-compare .compare__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .ab-compare .compare__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ab-text);
}

.page-about .ab-compare .compare__list li b {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .ab-hl {
  color: var(--amber);
  font-weight: 600;
}

/* ---------- 本地小组 ---------- */
.page-about .ab-team__list {
  list-style: none;
  margin: 6px 0 18px;
  padding: 0;
}

.page-about .ab-team__list li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-team__list li:first-child {
  border-top: 1px solid var(--line);
}

.page-about .ab-team__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lake);
  padding-top: 3px;
}

.page-about .ab-team__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-text);
}

.page-about .ab-team__list strong {
  color: var(--frost);
  font-weight: 600;
}

/* ---------- 稳定分 ---------- */
.page-about .ab-score {
  margin-top: 26px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.page-about .ab-score__value {
  display: block;
}

.page-about .ab-score__value .ab-score__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(62px, 12vw, 112px);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--green);
}

.page-about .ab-score__unit {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .ab-score__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-score__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-score__list li:first-child {
  border-top: 1px solid var(--line);
}

.page-about .ab-score__label {
  font-size: 15px;
  color: var(--frost);
}

.page-about .ab-score__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.page-about .ab-tags {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .ab-score__note {
  margin: 18px 0 0;
  max-width: 52em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-text);
}

/* ---------- 横向轨道时间线 ---------- */
.page-about .ab-rail {
  list-style: none;
  margin: 30px 0 0;
  padding: 0 0 18px;
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-node {
  position: relative;
  flex: 0 0 min(70vw, var(--ab-rail-w));
  padding: 36px 6px 0 0;
  scroll-snap-align: start;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 0;
  right: -16px;
  height: 1px;
  background: var(--line);
}

.page-about .ab-node:last-child::before {
  right: 0;
}

.page-about .ab-node__dot {
  position: absolute;
  top: 2px;
  left: 0;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--lake);
  box-shadow: 0 0 0 4px rgba(47, 182, 196, 0.16);
}

.page-about .ab-node--stable .ab-node__dot {
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(62, 213, 152, 0.16);
}

.page-about .ab-node--watch .ab-node__dot {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(233, 146, 90, 0.18);
}

.page-about .ab-node__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .ab-node__title {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--frost);
}

.page-about .ab-node__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ab-text);
}

/* ---------- 结尾 ---------- */
.page-about .ab-section--last .section__sub {
  display: none;
}

.page-about .ab-next {
  margin-top: 26px;
  padding: 26px 22px;
  border-radius: var(--radius-lg);
}

.page-about .ab-next__text {
  margin: 0;
  max-width: 50em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ab-text);
}

.page-about .ab-next__actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-about .ab-hero {
    padding-bottom: 32px;
  }

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

  .page-about .ab-flow {
    gap: 112px;
  }

  .page-about .ab-body {
    padding-top: 72px;
    padding-bottom: 112px;
  }

  .page-about .ab-panel {
    padding: 30px 32px;
  }

  .page-about .ab-compare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .ab-next {
    padding: 40px 44px;
  }

  .page-about .ab-node {
    flex: 0 0 var(--ab-rail-w);
  }
}

@media (min-width: 1024px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 6.5fr) minmax(0, 5.5fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .ab-body {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .ab-scale {
    display: block;
    position: sticky;
    top: 116px;
    align-self: start;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-flow {
    gap: 136px;
  }

  .page-about .ab-score {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 48px;
  }
}
<<<END>>>