/* ===== 品牌价值页 · 专属样式，全部限定于 .page-about ===== */
.page-about {
  --ab-rail-w: 184px;
  --ab-mark: 14px;
}

/* ---------- 首屏框景 ---------- */
.page-about .ab-hero {
  padding-top: clamp(18px, 3vw, 32px);
}

.page-about .ab-hero .crumbs {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .ab-frame {
  position: relative;
  padding: clamp(26px, 4.4vw, 56px);
  background: linear-gradient(158deg, var(--ink) 0%, var(--navy) 68%, #0d2f57 100%);
  border: 1px solid rgba(195, 202, 214, 0.28);
  overflow: hidden;
}

.page-about .ab-frame::before {
  content: "";
  position: absolute;
  inset: 11px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  pointer-events: none;
}

.page-about .ab-frame__mark {
  position: absolute;
  width: var(--ab-mark);
  height: var(--ab-mark);
  border: 2px solid var(--orange);
  pointer-events: none;
}

.page-about .ab-frame__mark--tl {
  top: 10px;
  left: 10px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .ab-frame__mark--tr {
  top: 10px;
  right: 10px;
  border-left: 0;
  border-bottom: 0;
}

.page-about .ab-frame__mark--bl {
  bottom: 10px;
  left: 10px;
  border-right: 0;
  border-top: 0;
}

.page-about .ab-frame__mark--br {
  bottom: 10px;
  right: 10px;
  border-left: 0;
  border-top: 0;
}

.page-about .ab-frame__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 3.6vw, 46px);
}

.page-about .ab-frame h1 {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: clamp(29px, 4.3vw, 48px);
  line-height: 1.16;
  color: var(--white);
}

.page-about .ab-frame .lede {
  margin: 18px 0 0;
  max-width: 62ch;
  color: rgba(255, 255, 255, 0.8);
}

.page-about .ab-frame__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.page-about .ab-facts__item {
  background: rgba(7, 26, 51, 0.55);
  padding: 16px 18px;
}

.page-about .ab-facts dt {
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.6);
}

.page-about .ab-facts dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

@media (min-width: 900px) {
  .page-about .ab-frame__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .ab-facts {
    align-self: stretch;
    align-content: center;
  }
}

/* ---------- 双栏编辑部结构 ---------- */
.page-about .ab-ledger {
  display: grid;
  gap: clamp(24px, 3.6vw, 52px);
  min-width: 0;
}

@media (min-width: 960px) {
  .page-about .ab-ledger {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
  }
}

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

.page-about .ab-rail {
  min-width: 0;
  border-left: 1px solid var(--line);
  padding-left: 16px;
}

.page-about .ab-rail__list {
  display: flex;
  gap: 14px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-rail__item {
  flex: 0 0 auto;
}

.page-about .ab-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  position: relative;
  text-decoration: none;
  color: var(--gray);
  padding: 4px 0;
  transition: color 0.25s var(--ease);
}

.page-about .ab-rail__year {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
}

.page-about .ab-rail__note {
  font-size: 13px;
  letter-spacing: 0.02em;
}

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link[aria-current="true"] {
  color: var(--navy);
}

.page-about .ab-rail__link[aria-current="true"] .ab-rail__year {
  color: var(--orange);
}

@media (min-width: 960px) {
  .page-about .ab-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
  }

  .page-about .ab-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-about .ab-rail__item {
    flex: none;
  }

  .page-about .ab-rail__link {
    display: block;
    padding: 13px 0;
  }

  .page-about .ab-rail__link::before {
    content: "";
    position: absolute;
    left: -21px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--white);
    border: 1px solid var(--line);
    transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
  }

  .page-about .ab-rail__link[aria-current="true"]::before {
    background: var(--orange);
    border-color: var(--orange);
  }

  .page-about .ab-rail__year {
    display: block;
    font-size: 19px;
  }

  .page-about .ab-rail__note {
    display: block;
    margin-top: 2px;
    color: var(--gray);
  }
}

/* ---------- 沿革 ---------- */
.page-about .ab-history__figure {
  margin: 0 0 clamp(26px, 3.4vw, 40px);
}

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

.page-about .ab-stage {
  display: grid;
  gap: 6px 22px;
  background: var(--white);
  padding: clamp(20px, 3vw, 32px) clamp(18px, 2.6vw, 30px);
}

.page-about .ab-stage__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: -0.01em;
}

.page-about .ab-stage__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .ab-stage__body {
  margin: 0;
  color: var(--navy);
  font-size: 17px;
  line-height: 1.8;
}

.page-about .ab-stage__body a {
  color: var(--blue);
}

@media (min-width: 720px) {
  .page-about .ab-stage {
    grid-template-columns: 104px minmax(0, 1fr);
    grid-template-areas:
      "year title"
      "year body";
    align-items: start;
  }

  .page-about .ab-stage__year {
    grid-area: year;
    padding-top: 2px;
  }

  .page-about .ab-stage__title {
    grid-area: title;
  }

  .page-about .ab-stage__body {
    grid-area: body;
    margin-top: 4px;
  }
}

/* ---------- 版本体系 ---------- */
.page-about .ab-editions__grid {
  row-gap: clamp(24px, 3.4vw, 40px);
}

.page-about .ab-editions__figure .media {
  margin: 0;
}

.page-about .ab-tree {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
}

.page-about .ab-node {
  position: relative;
  margin-left: 12px;
  padding: 0 0 30px 40px;
  border-left: 1px solid var(--line);
}

.page-about .ab-node:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--white);
  border: 2px solid var(--line);
}

.page-about .ab-node--current::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .ab-node .step__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-about .ab-node .step__title {
  margin: 4px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(19px, 2.1vw, 23px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .ab-node .step__body {
  margin: 8px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--navy);
}

.page-about .ab-node__more {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.page-about .ab-node__more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
}

.page-about .ab-node__more summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-node__more summary::before {
  content: "+ ";
  font-family: var(--font-mono);
}

.page-about .ab-node__more[open] summary::before {
  content: "− ";
}

.page-about .ab-node__more p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .ab-editions__link {
  margin: 28px 0 0;
}

/* ---------- 服务覆盖 ---------- */
.page-about .ab-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 clamp(26px, 3.4vw, 40px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-metrics__item {
  background: var(--white);
  padding: 20px 18px;
}

.page-about .ab-metrics dt {
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--gray);
}

.page-about .ab-metrics dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.02em;
}

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

.page-about .ab-coverage__filter .filter-bar {
  margin-bottom: 22px;
}

.page-about .ab-ind-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(238px, 1fr));
  gap: 16px;
}

.page-about .ab-ind {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
}

.page-about .ab-ind .card__title {
  margin: 4px 0 0;
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

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

.page-about .ab-ind .tag {
  align-self: flex-start;
}

@media (min-width: 720px) {
  .page-about .ab-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 客户成功团队 ---------- */
.page-about .ab-team {
  color: var(--white);
}

.page-about .ab-team .eyebrow {
  color: var(--teal);
}

.page-about .ab-team h2 {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(26px, 3.2vw, 36px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.24;
  color: var(--white);
}

.page-about .ab-team .lede {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .ab-team__grid {
  row-gap: clamp(26px, 3.4vw, 40px);
}

.page-about .ab-team__figure .media {
  margin: 0;
}

.page-about .ab-team__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.page-about .ab-team__stat {
  background: rgba(7, 26, 51, 0.5);
  padding: 18px 16px;
}

.page-about .ab-team__stat dt {
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.62);
}

.page-about .ab-team__stat dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

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

/* ---------- 资质与信息安全 ---------- */
.page-about .ab-compliance__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(258px, 1fr));
  gap: 16px;
}

.page-about .ab-safe {
  padding: 24px 22px;
}

.page-about .ab-safe__num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .ab-safe .card__title {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .ab-safe p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gray);
}

.page-about .ab-compliance__note {
  margin: 24px 0 0;
  font-size: 15px;
  color: var(--gray);
}

.page-about .ab-compliance__note a {
  color: var(--blue);
}

/* ---------- 渠道生态 ---------- */
.page-about .ab-eco__grid {
  display: grid;
  gap: clamp(26px, 3.6vw, 52px);
  min-width: 0;
}

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

.page-about .ab-eco__list {
  display: grid;
  gap: 18px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-eco__item {
  padding-left: 18px;
  border-left: 2px solid var(--blue);
}

.page-about .ab-eco__item-title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .ab-eco__item p {
  margin: 6px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--navy);
}

.page-about .ab-eco__side {
  border-left: 1px solid var(--line);
  padding-left: 18px;
}

.page-about .ab-eco__stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 14px 0 0;
}

.page-about .ab-eco__num {
  font-family: var(--font-mono);
  font-size: clamp(34px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--orange);
  line-height: 1;
}

.page-about .ab-eco__unit {
  font-family: var(--font-sans);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--gray);
}

.page-about .ab-eco__side-text {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--navy);
}

.page-about .ab-eco__side-link {
  margin: 20px 0 0;
}

@media (min-width: 960px) {
  .page-about .ab-eco__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 结尾引导 ---------- */
.page-about .ab-cta {
  background: linear-gradient(140deg, var(--navy) 0%, var(--ink) 100%);
  color: var(--white);
}

.page-about .ab-cta .eyebrow {
  color: var(--teal);
}

.page-about .ab-cta__inner {
  display: grid;
  gap: 26px;
}

.page-about .ab-cta h2 {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(25px, 3vw, 34px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .ab-cta .lede {
  margin: 16px 0 0;
  max-width: 58ch;
  color: rgba(255, 255, 255, 0.78);
}

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

@media (min-width: 860px) {
  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .ab-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 窄屏收尾 ---------- */
@media (max-width: 600px) {
  .page-about .ab-frame::before {
    inset: 7px;
  }

  .page-about .ab-frame__actions .btn,
  .page-about .ab-cta__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }

  .page-about .ab-ind-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}
<<<END>>>