/* ============================================================
   page-about — 品牌使命
   竖向时间线为主轴，穿插团队分工条带与服务范围方块
   ============================================================ */

.page-about {
  background: var(--paper-ivory);
  color: var(--ink-graphite);
}

.page-about .wrap {
  min-width: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-mute);
}

.page-about .ab-crumb a {
  color: var(--cyan-ink);
  text-decoration: none;
  transition: color .16s var(--ease);
}

.page-about .ab-crumb a:hover {
  color: var(--pulse-violet);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-crumb__sep {
  color: var(--boundary-cloud);
}

/* ---------- 首屏导语 ---------- */
.page-about .ab-intro {
  padding: clamp(26px, 4vw, 52px) 0 clamp(44px, 6vw, 84px);
  background:
    radial-gradient(120% 88% at 90% -12%, rgba(106, 43, 226, .15), transparent 62%),
    radial-gradient(78% 66% at -8% 24%, rgba(0, 180, 216, .13), transparent 60%);
}

.page-about .ab-intro__grid {
  display: grid;
  gap: 32px;
}

.page-about .ab-intro__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan-ink);
}

.page-about .ab-intro__title {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-size: clamp(32px, 6.4vw, 66px);
  line-height: 1.05;
  letter-spacing: .02em;
  max-width: 12em;
}

.page-about .ab-intro__lead {
  margin: 0 0 28px;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.page-about .ab-intro__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--boundary-cloud);
  border: 1px solid var(--boundary-cloud);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: rgba(246, 243, 236, .94);
}

.page-about .ab-fact__num {
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.1;
  letter-spacing: .01em;
  color: var(--pulse-violet);
}

.page-about .ab-fact__label {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-mute);
}

/* ---------- 通用分区与标题 ---------- */
.page-about .ab-section {
  padding: clamp(44px, 6.4vw, 88px) 0;
}

.page-about .ab-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan-ink);
}

.page-about .ab-kicker--light {
  color: var(--amber-highland);
}

.page-about .ab-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.12;
  letter-spacing: .02em;
  max-width: 18em;
}

.page-about .ab-h2--light {
  color: #F2EFF9;
}

.page-about .ab-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .ab-head__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-mute);
}

/* ---------- 我们在做的事 ---------- */
.page-about .ab-what__grid {
  display: grid;
  gap: 24px;
}

.page-about .ab-what__body {
  min-width: 0;
  border-left: 2px solid var(--lilac-mist);
  padding-left: 20px;
}

.page-about .ab-what__body p {
  margin: 0 0 18px;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

/* ---------- 时间线面板 ---------- */
.page-about .ab-panel {
  --pt-ink: #F2EFF9;
  --pt-dim: #B9B2D0;
  --pt-line: rgba(201, 197, 214, .26);
  padding: clamp(24px, 4.4vw, 56px);
  border-radius: var(--r-lg);
  background: var(--indigo-night);
  overflow: hidden;
}

.page-about .ab-stages__figure {
  margin: 0 0 clamp(28px, 4vw, 44px);
}

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

.page-about .ab-timeline__row {
  position: relative;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 34px;
}

.page-about .ab-timeline__row::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 30px;
  bottom: 0;
  width: 1px;
  background: var(--pt-line);
}

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

.page-about .ab-timeline__row:last-child::before {
  display: none;
}

.page-about .ab-timeline__rail {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.page-about .ab-timeline__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--signal-cyan);
  background: var(--indigo-night);
  padding: 2px 0;
}

.page-about .ab-timeline__dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--signal-cyan);
  box-shadow: 0 0 0 5px rgba(0, 180, 216, .16);
  transition: transform .16s var(--ease), box-shadow .16s var(--ease);
}

.page-about .ab-timeline__row:nth-child(even) .ab-timeline__dot {
  background: var(--amber-highland);
  box-shadow: 0 0 0 5px rgba(224, 162, 51, .18);
}

.page-about .ab-timeline__row:hover .ab-timeline__dot {
  transform: scale(1.05);
  box-shadow: 0 0 0 8px rgba(0, 180, 216, .22);
}

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

.page-about .ab-timeline__time {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber-highland);
}

.page-about .ab-timeline__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: .02em;
  color: var(--pt-ink);
}

.page-about .ab-timeline__text {
  margin: 0 0 12px;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.82;
  color: var(--pt-dim);
}

.page-about .ab-timeline__meta {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid rgba(0, 180, 216, .45);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--signal-cyan);
}

/* ---------- 团队 ---------- */
.page-about .ab-team__figure {
  margin: 0 0 clamp(28px, 4vw, 44px);
}

.page-about .ab-team__grid {
  display: grid;
  gap: 20px;
}

.page-about .ab-team__col {
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--boundary-cloud);
  border-radius: var(--r-md);
  background: rgba(231, 225, 250, .42);
  transition: border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-about .ab-team__col:hover {
  border-color: var(--pulse-violet);
  background: rgba(231, 225, 250, .68);
}

.page-about .ab-team__col:nth-child(2) {
  background: rgba(0, 180, 216, .1);
}

.page-about .ab-team__col:nth-child(2):hover {
  border-color: var(--cyan-ink);
  background: rgba(0, 180, 216, .16);
}

.page-about .ab-team__count {
  margin: 0 0 14px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ink-mute);
}

.page-about .ab-team__count-num {
  font-family: var(--font-display);
  font-size: 32px;
  line-height: 1;
  color: var(--pulse-violet);
}

.page-about .ab-team__col:nth-child(2) .ab-team__count-num {
  color: var(--cyan-ink);
}

.page-about .ab-team__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 21px;
  line-height: 1.24;
  letter-spacing: .02em;
}

.page-about .ab-team__list {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .ab-team__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .ab-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--pulse-violet);
}

.page-about .ab-team__col:nth-child(2) .ab-team__list li::before {
  background: var(--cyan-ink);
}

.page-about .ab-team__rhythm {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--boundary-cloud);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: .02em;
  color: var(--ink-mute);
}

.page-about .ab-team__note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--amber-highland);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-mute);
}

/* ---------- 服务范围 ---------- */
.page-about .ab-service__panel {
  display: grid;
  gap: 30px;
  padding: clamp(26px, 4.4vw, 60px);
  border-radius: var(--r-lg);
  background: var(--pine-deep);
  color: #E6F1EC;
}

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

.page-about .ab-service__text {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(230, 241, 236, .8);
}

.page-about .ab-blocks {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.page-about .ab-blocks__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber-highland);
}

.page-about .ab-blocks__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-about .ab-block {
  display: block;
  padding: 13px 12px;
  border: 1px solid rgba(230, 241, 236, .24);
  border-radius: var(--r-sm);
  font-size: 14px;
  line-height: 1.5;
  color: rgba(230, 241, 236, .92);
  transition: background-color .16s var(--ease), border-color .16s var(--ease), transform .16s var(--ease);
}

.page-about .ab-block:hover {
  background: rgba(0, 180, 216, .2);
  border-color: var(--signal-cyan);
  transform: translateY(-2px);
}

.page-about .ab-service__figure {
  margin: 0;
  align-self: start;
}

/* ---------- 三件事 ---------- */
.page-about .ab-principles__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--boundary-cloud);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .ab-principles__item {
  padding: clamp(24px, 3.4vw, 40px);
  background: var(--paper-ivory);
}

.page-about .ab-principles__num {
  display: block;
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-size: clamp(34px, 4.4vw, 48px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--lilac-mist);
}

.page-about .ab-principles__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 21px;
  line-height: 1.24;
  letter-spacing: .02em;
}

.page-about .ab-principles__item p {
  margin: 0;
  max-width: 30em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 合作与收录 ---------- */
.page-about .ab-partners__panel {
  display: grid;
  gap: 30px;
  padding: clamp(26px, 4.4vw, 60px);
  border-radius: var(--r-lg);
  background: var(--archive-wine);
  color: #F7EAF0;
}

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

.page-about .ab-partners__text {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(247, 234, 240, .84);
}

.page-about .ab-partners__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: rgba(247, 234, 240, .22);
  border-radius: var(--r-sm);
  overflow: hidden;
  align-self: start;
}

.page-about .ab-partners__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 16px;
  background: rgba(21, 12, 46, .28);
}

.page-about .ab-partners__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--amber-highland);
}

.page-about .ab-partners__v {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: #F7EAF0;
}

/* ---------- 下一步 ---------- */
.page-about .ab-next {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .ab-next__head {
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-about .ab-next__lead {
  margin: 12px 0 0;
  max-width: 30em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-mute);
}

.page-about .ab-next__grid {
  display: grid;
  gap: 14px;
}

.page-about .ab-next__card {
  display: grid;
  gap: 10px;
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--boundary-cloud);
  border-radius: var(--r-md);
  background: #FFFFFF;
  text-decoration: none;
  color: inherit;
  transition: border-color .16s var(--ease), transform .16s var(--ease);
}

.page-about .ab-next__card:hover {
  border-color: var(--pulse-violet);
  transform: translateX(4px);
}

.page-about .ab-next__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--signal-cyan);
}

.page-about .ab-next__title {
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: .02em;
}

.page-about .ab-next__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-mute);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .ab-blocks__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 880px) {
  .page-about .ab-intro__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(240px, .9fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .ab-head {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 24px;
  }

  .page-about .ab-head__meta {
    text-align: right;
  }

  .page-about .ab-what__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .ab-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .ab-service__panel {
    grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-partners__panel {
    grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .ab-timeline__row {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 22px;
  }

  .page-about .ab-timeline__row::before {
    left: 31px;
  }
}