.page-about {
  --ab-line-soft: rgba(24, 39, 64, 0.72);
  --ab-cell: #0A1426;
  background: var(--ink);
  color: var(--silver);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: 88px;
  overflow-x: clip;
}

.page-about .ab-eyebrow {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0;
}

/* ---------- HERO ---------- */
.page-about .ab-hero {
  padding: 18px 0 8px;
}

.page-about .ab-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 7.2vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-about .ab-hero__title .ab-hl {
  display: block;
  color: var(--cyan);
}

.page-about .ab-hero__lede {
  max-width: 62ch;
  font-size: 16px;
  margin: 20px 0 0;
  color: var(--silver);
}

.page-about .ab-stats {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-stat {
  background: var(--ab-cell);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-stat__k {
  font-size: 13px;
  color: var(--silver);
  letter-spacing: 0.02em;
}

.page-about .ab-stat__v {
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 50px);
  line-height: 1;
  letter-spacing: 0.02em;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .ab-stat__u {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--silver);
  letter-spacing: 0;
}

.page-about .ab-hero__figure {
  margin: 26px 0 0;
}

/* ---------- 通用分区 ---------- */
.page-about .ab-section {
  padding-top: 58px;
}

.page-about .ab-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
  margin-bottom: 20px;
}

.page-about .ab-head__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .ab-head__idx::before {
  content: "— ";
  color: var(--line);
}

.page-about .ab-head__t {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 0;
}

.page-about .ab-p {
  max-width: 68ch;
  font-size: 16px;
  margin: 0 0 16px;
}

.page-about .ab-p--tight {
  margin-top: 22px;
}

/* ---------- 覆盖范围面板 ---------- */
.page-about .ab-cov {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-cov__cell {
  background: var(--ab-cell);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 2px solid transparent;
  transition: border-color 240ms var(--ease), background 240ms var(--ease);
}

.page-about .ab-cov__cell:hover {
  border-top-color: var(--cyan);
  background: #0C1830;
}

.page-about .ab-cov__k {
  font-size: 13px;
  color: var(--silver);
}

.page-about .ab-cov__v {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 42px);
  line-height: 1;
  letter-spacing: 0.02em;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .ab-cov__u {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--silver);
}

.page-about .ab-cov__n {
  font-size: 13px;
  line-height: 1.6;
  color: #93A4BA;
}

.page-about .ab-tags {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--silver);
  background: var(--ab-cell);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 7px 13px;
  cursor: default;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .ab-tag:hover {
  color: var(--white);
  border-color: var(--cyan);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-team__item {
  background: var(--ab-cell);
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--r-sm);
  padding: 16px 18px 18px;
}

.page-about .ab-team__idx {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .ab-team__role {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.2;
  color: var(--white);
  margin: 8px 0 8px;
}

.page-about .ab-team__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
  margin: 0;
}

/* ---------- 数据来源 ---------- */
.page-about .ab-data__figure {
  margin: 22px 0 0;
}

/* ---------- 时间线 ---------- */
.page-about .ab-tl {
  margin-top: 6px;
}

.page-about .ab-tl__track {
  list-style: none;
  margin: 0;
  padding: 26px 4px 14px;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-tl__track::-webkit-scrollbar {
  height: 4px;
}

.page-about .ab-tl__track::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 2px;
}

.page-about .ab-tl__track::-webkit-scrollbar-track {
  background: transparent;
}

.page-about .ab-tl__item {
  position: relative;
  flex: 0 0 244px;
  scroll-snap-align: start;
  background: var(--ab-cell);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 34px 16px 18px;
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 16px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 31, 0.14);
}

.page-about .ab-tl__item::after {
  content: "";
  position: absolute;
  top: 18px;
  left: 31px;
  right: -14px;
  height: 1px;
  background: var(--cyan);
  opacity: 0.55;
}

.page-about .ab-tl__item:last-child::after {
  display: none;
}

.page-about .ab-tl__year {
  font-size: 20px;
  letter-spacing: 0.02em;
}

.page-about .ab-tl__t {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.25;
  color: var(--white);
  margin: 10px 0 8px;
}

.page-about .ab-tl__d {
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
  margin: 0;
}

/* ---------- 受众与地图 ---------- */
.page-about .ab-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: start;
}

.page-about .ab-map {
  margin: 0;
}

.page-about .ab-map .bw-figure__media {
  aspect-ratio: 5 / 4;
}

.page-about .ab-map .bw-figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 生态三栏 ---------- */
.page-about .ab-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-cols__item {
  background: var(--ab-cell);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 20px 18px 22px;
}

.page-about .ab-cols__v {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1;
  letter-spacing: 0.02em;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .ab-cols__u {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--silver);
}

.page-about .ab-cols__t {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  color: var(--white);
  margin: 12px 0 8px;
  line-height: 1.25;
}

.page-about .ab-cols__d {
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
  margin: 0;
}

/* ---------- 结尾 ---------- */
.page-about .ab-cta {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(140deg, #0B1830 0%, #060D1C 100%);
  padding: 26px 20px 24px;
}

.page-about .ab-cta__t {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.1;
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .ab-cta__d {
  max-width: 58ch;
  font-size: 15px;
  margin: 0 0 20px;
}

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

.page-about .ab-cta__n {
  font-size: 14px;
  margin: 20px 0 0;
  color: var(--silver);
}

/* ---------- 图片基础 ---------- */
.page-about .bw-figure__media img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-about {
    padding-bottom: 112px;
  }

  .page-about .ab-hero {
    padding-top: 28px;
  }

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

  .page-about .ab-stat {
    padding: 20px 20px 24px;
  }

  .page-about .ab-section {
    padding-top: 76px;
  }

  .page-about .ab-head {
    gap: 16px;
    margin-bottom: 26px;
  }

  .page-about .ab-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .ab-cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .ab-cta {
    padding: 36px 34px 32px;
  }
}

@media (min-width: 1000px) {
  .page-about .ab-split {
    grid-template-columns: 7fr 5fr;
    gap: 30px;
  }

  .page-about .ab-hero__lede {
    font-size: 17px;
  }
}