/* ===== 品牌总览 · page-about ===== */
.page-about {
  --ab-cell: 72px;
  --ab-paper-ink: #0E1A26;
  --ab-paper-soft: #33414F;
  background: var(--ink);
  color: var(--ice);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-weight: 800;
  letter-spacing: -0.005em;
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(22px, 4vw, 44px) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(39, 73, 111, 0.55) 0%, rgba(10, 20, 32, 0) 62%),
    var(--ink);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: var(--ab-cell) var(--ab-cell);
  opacity: 0.22;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 52%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, #000 52%, transparent 100%);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(18px, 3vw, 30px);
}

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

.page-about .ab-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(1.85rem, 4.6vw, 3.3rem);
  line-height: 1.18;
  color: var(--ice);
}

.page-about .ab-hero__lead {
  margin: 18px 0 0;
  max-width: 38em;
  font-size: clamp(0.98rem, 1.5vw, 1.08rem);
  line-height: 1.85;
  color: var(--ice);
  opacity: 0.86;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .ab-hero__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-hero__media .media-frame__caption {
  display: block;
  padding: 12px 16px;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mute);
  border-top: 1px solid var(--line);
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 摘要数字带 ---------- */
.page-about .ab-stats {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 1px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.page-about .ab-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .ab-stats__label {
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--mute);
}

@media (min-width: 680px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

/* ---------- 主区骨架：7 列正文 + 3 列旁注 ---------- */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
  padding-top: clamp(44px, 7vw, 84px);
  padding-bottom: clamp(56px, 8vw, 100px);
}

.page-about .ab-main {
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 7vw, 84px);
  min-width: 0;
}

@media (min-width: 1000px) {
  .page-about .ab-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    align-items: start;
  }
}

/* ---------- 区块通用 ---------- */
.page-about .ab-block {
  min-width: 0;
}

.page-about .ab-block__head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .ab-block__title {
  margin: 10px 0 0;
  font-size: clamp(1.35rem, 2.6vw, 1.95rem);
  line-height: 1.28;
  color: var(--ice);
}

.page-about .ab-block__lead {
  margin: 12px 0 0;
  max-width: 36em;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--mute);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-axis {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .ab-axis::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 13px;
  width: 1px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--line) 16%, var(--line) 100%);
}

.page-about .ab-axis__node {
  position: relative;
  padding: 0 0 30px 42px;
}

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

.page-about .ab-axis__node::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  width: 13px;
  height: 13px;
  background: var(--ink-2);
  border: 2px solid var(--orange);
  transform: rotate(45deg);
  transition: background-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .ab-axis__node:hover::before,
.page-about .ab-axis__node:focus-within::before {
  background: var(--orange);
  transform: rotate(45deg) scale(1.18);
}

.page-about .ab-axis__year {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--orange);
}

.page-about .ab-axis__title {
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--ice);
}

.page-about .ab-axis__body p {
  margin: 8px 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mute);
}

@media (min-width: 860px) {
  .page-about .ab-axis::before {
    left: 97px;
  }

  .page-about .ab-axis__node {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 24px;
    padding: 0 0 34px;
  }

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

  .page-about .ab-axis__node::before {
    left: 91px;
    top: 5px;
  }

  .page-about .ab-axis__year {
    text-align: right;
    margin-bottom: 0;
    padding-top: 3px;
    font-size: 0.85rem;
    letter-spacing: 0.02em;
  }
}

/* ---------- 团队与分工 ---------- */
.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 36px);
  align-items: center;
}

.page-about .ab-ring {
  width: min(220px, 62%);
  margin: 0 auto;
}

.page-about .ab-ring svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-team__item {
  padding: 14px 16px 14px 18px;
  background: var(--ink-2);
  border-left: 2px solid var(--line);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .ab-team__item:nth-child(1) { border-left-color: var(--orange); }
.page-about .ab-team__item:nth-child(2) { border-left-color: var(--orange-2); }
.page-about .ab-team__item:nth-child(3) { border-left-color: var(--green); }
.page-about .ab-team__item:nth-child(4) { border-left-color: var(--ice); }

.page-about .ab-team__item:hover,
.page-about .ab-team__item:focus-within {
  transform: translate(4px, -4px);
  background: var(--arena);
}

.page-about .ab-team__item h3 {
  font-size: 1rem;
  line-height: 1.4;
  color: var(--ice);
}

.page-about .ab-team__item p {
  margin: 6px 0 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mute);
}

.page-about .ab-team__media {
  margin: clamp(28px, 4vw, 40px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .ab-team__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-team__media .media-frame__caption {
  display: block;
  padding: 12px 16px;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mute);
  border-top: 1px solid var(--line);
}

@media (min-width: 780px) {
  .page-about .ab-team__grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .ab-ring {
    width: 100%;
    margin: 0;
  }
}

/* ---------- 数据来源卡片 ---------- */
.page-about .ab-data__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-data__card {
  position: relative;
  padding: 24px 22px;
  background: var(--paper);
  color: var(--ab-paper-ink);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .ab-data__card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 20px;
  height: 20px;
  background: var(--ink);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.page-about .ab-data__card:hover {
  transform: translate(4px, -4px);
  box-shadow: 0 14px 0 -8px rgba(255, 106, 26, 0.28);
}

.page-about .ab-data__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--orange);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--paper-2);
}

.page-about .ab-data__title {
  margin-top: 14px;
  font-size: 1.06rem;
  line-height: 1.4;
  color: var(--ab-paper-ink);
}

.page-about .ab-data__text {
  margin: 10px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--ab-paper-soft);
}

@media (min-width: 760px) {
  .page-about .ab-data__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 资质细线表 ---------- */
.page-about .ab-cert {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-cert__row {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.18s var(--ease);
}

.page-about .ab-cert__row:hover {
  background: rgba(255, 106, 26, 0.06);
}

.page-about .ab-cert__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--orange);
  transform: rotate(45deg);
}

.page-about .ab-cert__mark::before {
  content: "✓";
  transform: rotate(-45deg);
}

.page-about .ab-cert__name {
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--ice);
}

.page-about .ab-cert__time {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--mute);
  white-space: nowrap;
}

/* ---------- 服务覆盖 ---------- */
.page-about .ab-coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: clamp(20px, 3vw, 30px);
  background: var(--arena);
  border-left: 3px solid var(--orange);
}

.page-about .ab-coverage__text {
  margin: 0 0 14px;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--ice);
  opacity: 0.9;
}

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

.page-about .ab-coverage__nums {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.page-about .ab-coverage__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.6vw, 1.8rem);
  font-weight: 700;
  color: var(--orange);
  line-height: 1.2;
}

.page-about .ab-coverage__cap {
  display: block;
  margin-top: 6px;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--mute);
}

@media (min-width: 780px) {
  .page-about .ab-coverage {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: center;
    gap: 32px;
  }
}

/* ---------- 延伸入口 ---------- */
.page-about .ab-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .ab-next__card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "k arrow"
    "d arrow";
  align-items: center;
  gap: 4px 16px;
  padding: 18px 20px;
  text-decoration: none;
  background: var(--ink-2);
  border: 1px solid var(--line);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .ab-next__card:hover,
.page-about .ab-next__card:focus-visible {
  border-color: var(--orange);
  background: var(--arena);
  transform: translate(4px, -4px);
}

.page-about .ab-next__k {
  grid-area: k;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ice);
}

.page-about .ab-next__d {
  grid-area: d;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--mute);
}

.page-about .ab-next__arrow {
  grid-area: arrow;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--orange);
}

@media (min-width: 760px) {
  .page-about .ab-next {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 右侧旁注 ---------- */
.page-about .ab-side {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.page-about .ab-side__block {
  padding: 20px 18px;
  background: var(--ink-2);
  border-top: 2px solid var(--line);
}

.page-about .ab-side__block--paper {
  background: var(--paper);
  color: var(--ab-paper-ink);
  border-top-color: var(--orange);
}

.page-about .ab-side__title {
  margin: 12px 0 14px;
  font-size: 0.98rem;
  line-height: 1.4;
  color: var(--ice);
}

.page-about .ab-side__block--paper .ab-side__title {
  color: var(--ab-paper-ink);
}

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

.page-about .ab-terms dt {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--orange-2);
  margin-bottom: 4px;
}

.page-about .ab-terms dd {
  margin: 0 0 14px;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--mute);
}

.page-about .ab-terms dd:last-child {
  margin-bottom: 0;
}

.page-about .ab-side__nums {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 12px;
}

.page-about .ab-side__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--orange);
}

.page-about .ab-side__block--paper .ab-side__num {
  color: #C24A00;
}

.page-about .ab-side__cap {
  display: block;
  margin-top: 5px;
  font-size: 0.76rem;
  line-height: 1.55;
  color: var(--mute);
}

.page-about .ab-side__block--paper .ab-side__cap {
  color: var(--ab-paper-soft);
}

@media (min-width: 1000px) {
  .page-about .ab-side {
    position: sticky;
    top: 108px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-axis__node::before,
  .page-about .ab-team__item,
  .page-about .ab-data__card,
  .page-about .ab-cert__row,
  .page-about .ab-next__card {
    transition: none;
  }

  .page-about .ab-axis__node:hover::before,
  .page-about .ab-axis__node:focus-within::before {
    transform: rotate(45deg);
  }

  .page-about .ab-team__item:hover,
  .page-about .ab-team__item:focus-within,
  .page-about .ab-data__card:hover,
  .page-about .ab-next__card:hover,
  .page-about .ab-next__card:focus-visible {
    transform: none;
  }
}
<<<END>>>