/* ============================================================
   品牌介绍页 /page-about/
   作用域：.page-about
   ============================================================ */

.page-about {
  --ab-gap: clamp(20px, 3vw, 44px);
  --ab-sec-space: clamp(46px, 6.5vw, 92px);
  --ab-muted: #5B646E;
  --ab-hair: rgba(12, 16, 21, .13);
}

/* ---------- 面包屑 ---------- */
.page-about .crumb {
  padding-top: 20px;
}

.page-about .crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ab-muted);
}

.page-about .crumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--silver);
}

.page-about .crumb a {
  color: var(--blue);
  text-decoration: none;
  transition: color var(--t-fast);
}

.page-about .crumb a:hover {
  color: var(--green);
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  display: grid;
  gap: var(--ab-gap);
  padding-top: clamp(30px, 5vw, 62px);
  padding-bottom: clamp(34px, 5vw, 62px);
}

.page-about .ab-hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--green);
}

.page-about .ab-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 74px);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--ink);
  max-width: 15em;
}

.page-about .ab-hero__title em {
  font-style: normal;
  color: var(--green);
}

.page-about .ab-hero__split {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .ab-hero__lead {
  margin: 0;
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.78;
  color: var(--ink);
  max-width: 36em;
}

.page-about .ab-hero__fig {
  margin: 0;
  padding-top: 10px;
  border-top: 2px solid var(--green);
}

.page-about .ab-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  background: var(--green-soft);
}

.page-about .ab-hero__fig .media__cap {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ab-muted);
}

/* 首屏数据条 */
.page-about .ab-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--silver);
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--silver);
}

.page-about .ab-strip > div {
  display: grid;
  gap: 2px;
  padding: 14px 16px 16px;
  background: var(--paper);
}

.page-about .ab-strip dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ab-muted);
}

.page-about .ab-strip dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--green-deep);
  font-variant-numeric: tabular-nums;
}

/* ---------- 通用章节 ---------- */
.page-about .ab-sec {
  padding: var(--ab-sec-space) 0;
}

.page-about .ab-sec--soft {
  background: var(--green-soft);
}

.page-about .ab-sec--blue {
  background: var(--blue-soft);
}

.page-about .ab-sec--tight {
  padding-bottom: clamp(56px, 7vw, 104px);
}

.page-about .ab-sec__head {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 16px;
  margin-bottom: clamp(24px, 3.4vw, 42px);
  border-bottom: 1px solid var(--ink);
}

.page-about .ab-sec__head::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 60px;
  height: 3px;
  background: var(--green);
}

.page-about .ab-sec__main {
  display: grid;
  gap: 10px;
}

.page-about .ab-sec__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--green);
  text-transform: uppercase;
}

.page-about .ab-sec__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 2.7vw, 36px);
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .ab-sec__aside {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--ab-muted);
  max-width: 34em;
}

.page-about .ab-sec__mark {
  position: absolute;
  right: 0;
  top: -.16em;
  font-family: var(--font-mono);
  font-size: clamp(56px, 9vw, 124px);
  font-weight: 700;
  line-height: 1;
  color: var(--green);
  opacity: .09;
  pointer-events: none;
  user-select: none;
}

/* ---------- 01 时间轴 ---------- */
.page-about .ab-line {
  display: grid;
  gap: 0;
  margin-left: 5px;
  border-left: 1px solid var(--silver);
}

.page-about .ab-node {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 20px 0 20px 20px;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 26px;
  width: 9px;
  height: 9px;
  background: var(--green);
}

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

.page-about .ab-node__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 700;
  line-height: 1;
  color: var(--green-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-node__t {
  margin: 0 0 6px;
  font-size: clamp(16px, 1.6vw, 20px);
  font-weight: 700;
  line-height: 1.42;
  color: var(--ink);
}

.page-about .ab-node__d {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--ink);
  max-width: 40em;
}

.page-about .ab-node__tag {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ab-muted);
}

.page-about .ab-node__note {
  min-height: 76px;
  display: flex;
  align-items: flex-start;
}

.page-about .note-rot {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ab-muted);
  margin: 0;
}

/* ---------- 02 三级流程 ---------- */
.page-about .ab-flow {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

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

.page-about .ab-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-step:last-child {
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-step__n {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-step__t {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .ab-step__d {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--ink);
  max-width: 38em;
}

.page-about .ab-flow__fig {
  margin: 0;
  border: 1px solid var(--silver);
  background: var(--paper);
}

.page-about .ab-flow__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  background: var(--blue-soft);
}

.page-about .ab-flow__fig .media__cap {
  display: block;
  margin: 0;
  padding: 12px 14px;
  border-top: 1px solid var(--silver);
  font-size: 12px;
  line-height: 1.6;
  color: var(--ab-muted);
}

/* ---------- 03 内容分类 ---------- */
.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .filter-bar [data-filter-count] {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ab-muted);
}

.page-about .filter-btn {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
}

.page-about .filter-btn[aria-pressed="true"] {
  background: var(--green-deep);
  border-color: var(--green-deep);
  color: var(--paper);
}

.page-about .ab-cats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--silver);
  border: 1px solid var(--silver);
}

.page-about .ab-cat {
  display: grid;
  gap: 6px;
  padding: 20px 18px 22px;
  background: var(--paper);
}

.page-about .ab-cat__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--green);
}

.page-about .ab-cat__t {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .ab-cat__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--ink);
}

/* ---------- 04 薪资结构表格 ---------- */
.page-about .ab-table-scroll {
  overflow-x: auto;
  border: 1px solid var(--silver);
  background: var(--paper);
}

.page-about .ab-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .ab-table caption {
  padding: 14px 16px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ab-muted);
  border-bottom: 1px solid var(--silver);
}

.page-about .ab-table th,
.page-about .ab-table td {
  padding: 13px 16px;
  text-align: left;
  vertical-align: top;
  line-height: 1.68;
  border-bottom: 1px solid var(--ab-hair);
  transition: background var(--t-fast);
}

.page-about .ab-table thead th {
  background: var(--green);
  color: var(--paper);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .08em;
  border-bottom: none;
}

.page-about .ab-table tbody th {
  width: 26%;
  font-weight: 700;
  color: var(--ink);
}

.page-about .ab-table tbody td {
  color: var(--ink);
}

.page-about .ab-table tbody tr:last-child th,
.page-about .ab-table tbody tr:last-child td {
  border-bottom: none;
}

.page-about .ab-table tbody tr:hover th,
.page-about .ab-table tbody tr:hover td {
  background: var(--green-soft);
}

/* ---------- 05 团队 ---------- */
.page-about .ab-team {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .ab-team__lead {
  margin: 0 0 20px;
  font-size: clamp(15px, 1.35vw, 16.5px);
  line-height: 1.78;
  color: var(--ink);
  max-width: 40em;
}

.page-about .ab-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-facts li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink);
}

.page-about .ab-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 9px;
  height: 2px;
  background: var(--orange);
}

.page-about .ab-team__fig {
  margin: 0;
  border: 1px solid var(--silver);
  background: var(--paper);
}

.page-about .ab-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--blue-deep);
}

.page-about .ab-team__fig .media__cap {
  display: block;
  margin: 0;
  padding: 12px 14px;
  border-top: 1px solid var(--silver);
  font-size: 12px;
  line-height: 1.6;
  color: var(--ab-muted);
}

/* ---------- 深蓝数据带 ---------- */
.page-about .ab-band {
  padding: clamp(34px, 4.6vw, 60px) 0;
  border-top: 2px solid var(--orange);
}

.page-about .ab-band__label {
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: rgba(246, 247, 244, .74);
}

.page-about .ab-band__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 22px;
}

.page-about .ab-band__list li {
  display: grid;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid rgba(195, 203, 211, .34);
}

.page-about .ab-band__v {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-band__k {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(246, 247, 244, .76);
}

/* ---------- 06 口径回顾 ---------- */
.page-about .ab-review {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .ab-review__lead {
  margin: 0 0 16px;
  font-size: clamp(15px, 1.35vw, 16.5px);
  line-height: 1.78;
  color: var(--ink);
  max-width: 40em;
}

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

.page-about .ab-review__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-review__list li {
  padding-left: 16px;
  border-left: 2px solid var(--green);
  font-size: 14px;
  line-height: 1.74;
  color: var(--ink);
}

/* ---------- 相关入口 ---------- */
.page-about .ab-links {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--ink);
}

.page-about .ab-links li {
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-links a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 16px 2px;
  text-decoration: none;
  color: var(--ink);
}

.page-about .ab-links b {
  font-size: 16px;
  font-weight: 700;
  color: var(--green-deep);
  transition: color var(--t-fast);
}

.page-about .ab-links span {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ab-muted);
  transition: color var(--t-fast);
}

.page-about .ab-links a:hover b {
  color: var(--blue);
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-underline-offset: 4px;
}

.page-about .ab-links a:hover span {
  color: var(--ink);
}

/* ---------- 数字统一 ---------- */
.page-about .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .ab-hero__split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 4vw, 60px);
  }

  .page-about .ab-sec__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    align-items: end;
    column-gap: 40px;
    row-gap: 0;
  }

  .page-about .ab-node {
    grid-template-columns: 108px minmax(0, 1fr) 128px;
    column-gap: 28px;
    padding: 26px 0 26px 26px;
  }

  .page-about .ab-node::before {
    top: 32px;
  }

  .page-about .ab-flow {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
  }

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

  .page-about .ab-team {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .ab-review {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .ab-links a {
    flex-wrap: nowrap;
    justify-content: flex-start;
  }

  .page-about .ab-links b {
    flex: 0 0 128px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-table th,
  .page-about .ab-table td,
  .page-about .ab-links b,
  .page-about .ab-links span,
  .page-about .crumb a {
    transition: none;
  }
}