/* ============================================================
   关于我们 / page-about
   作用域：.page-about
   ============================================================ */

.page-about {
  background: var(--rb-abyss);
  color: var(--rb-text);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 60px) 0 clamp(34px, 6vw, 68px);
  background:
    radial-gradient(120% 92% at 88% 6%, rgba(37, 244, 216, 0.14) 0%, rgba(37, 244, 216, 0) 58%),
    linear-gradient(160deg, var(--rb-navy-2) 0%, var(--rb-abyss) 64%);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -14%;
  width: min(72vw, 620px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(135deg, rgba(37, 244, 216, 0.2) 0%, rgba(37, 244, 216, 0) 62%);
  transform: rotate(18deg);
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: min(48%, 420px);
  height: 3px;
  background: linear-gradient(90deg, var(--rb-coral) 0%, rgba(255, 95, 61, 0) 100%);
}

.page-about .ab-hero > .rb-container {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(26px, 5vw, 52px);
  margin-top: clamp(20px, 4vw, 36px);
  align-items: center;
}

.page-about .ab-hero__title {
  font-family: var(--rb-font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 5vw, 3.05rem);
  line-height: 1.14;
  letter-spacing: -0.012em;
  margin: 14px 0 18px;
  max-width: 30rem;
  color: var(--rb-text);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .ab-hero__figure {
  margin: 0;
  border: 1px solid var(--rb-line);
  background: var(--rb-navy);
}

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}

/* ---------- 首屏数据条 ---------- */
.page-about .ab-stats {
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--rb-line);
  border-left: 1px solid var(--rb-line-faint);
}

.page-about .ab-stat {
  padding: 16px clamp(12px, 2vw, 22px) 18px;
  border-right: 1px solid var(--rb-line-faint);
  border-bottom: 1px solid var(--rb-line-faint);
}

.page-about .ab-stat__value {
  display: block;
  font-family: var(--rb-font-mono);
  font-size: clamp(0.95rem, 2.3vw, 1.12rem);
  color: var(--rb-cyan);
  letter-spacing: 0.01em;
  line-height: 1.3;
}

.page-about .ab-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--rb-text-faint);
}

/* ---------- 通用小节头部 ---------- */
.page-about .ab-head {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(26px, 4vw, 44px);
  max-width: 62ch;
}

.page-about .ab-h2 {
  font-family: var(--rb-font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.4vw, 2.05rem);
  line-height: 1.24;
  letter-spacing: -0.008em;
  margin: 0;
  color: var(--rb-text);
}

.page-about .ab-sub {
  color: var(--rb-text-dim);
  font-size: clamp(0.95rem, 2.1vw, 1.02rem);
  line-height: 1.78;
  margin: 0;
}

/* ---------- 我们做什么 ---------- */
.page-about .ab-do__grid {
  display: grid;
  gap: 1px;
  background: var(--rb-line-soft);
  border: 1px solid var(--rb-line-soft);
}

.page-about .ab-card {
  position: relative;
  background: linear-gradient(180deg, var(--rb-navy) 0%, var(--rb-abyss) 100%);
  padding: clamp(22px, 3.2vw, 34px);
  overflow: hidden;
}

.page-about .ab-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 2px;
  background: var(--rb-cyan);
  transition: width 0.45s var(--rb-ease);
}

.page-about .ab-card:hover::after,
.page-about .ab-card:focus-within::after {
  width: 100%;
}

.page-about .ab-card__num {
  display: inline-block;
  font-family: var(--rb-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  color: var(--rb-coral);
  margin-bottom: 14px;
}

.page-about .ab-card .rb-h3 {
  margin: 0;
}

.page-about .ab-card p {
  margin: 12px 0 0;
  color: var(--rb-text-dim);
  font-size: 0.94rem;
  line-height: 1.82;
}

/* ---------- 上手路径 ---------- */
.page-about .ab-steps {
  display: grid;
  gap: 1px;
  background: var(--rb-line-soft);
  border-top: 1px solid var(--rb-line-soft);
  border-bottom: 1px solid var(--rb-line-soft);
}

.page-about .ab-steps .rb-step {
  background: var(--rb-navy-2);
  padding: clamp(20px, 3vw, 30px);
}

.page-about .ab-steps .rb-step__num {
  display: block;
  font-family: var(--rb-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--rb-cyan);
  margin-bottom: 12px;
}

.page-about .ab-steps .rb-step__title {
  margin: 0;
}

.page-about .ab-steps .rb-step p {
  margin: 10px 0 0;
  color: var(--rb-text-dim);
  font-size: 0.9rem;
  line-height: 1.76;
}

/* ---------- 回访节奏 + 侧栏 ---------- */
.page-about .ab-path__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .ab-timeline {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0 0 0 clamp(16px, 3vw, 26px);
  border-left: 1px solid var(--rb-line);
}

.page-about .ab-timeline__item {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 30px);
}

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

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(16px, 3vw, 26px) - 4px);
  top: 0.42em;
  width: 7px;
  height: 7px;
  background: var(--rb-cyan);
}

.page-about .ab-timeline__item--hot::before {
  background: var(--rb-coral);
}

.page-about .ab-timeline__time {
  display: block;
  font-family: var(--rb-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--rb-text-faint);
  margin-bottom: 8px;
}

.page-about .ab-timeline__title {
  margin: 0;
  font-family: var(--rb-font-display);
  font-size: clamp(1rem, 2.4vw, 1.15rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--rb-text);
}

.page-about .ab-timeline__text {
  margin: 8px 0 0;
  color: var(--rb-text-dim);
  font-size: 0.92rem;
  line-height: 1.78;
}

.page-about .ab-path__aside {
  display: flex;
  gap: clamp(12px, 2.4vw, 20px);
  align-items: flex-start;
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--rb-line);
  background: linear-gradient(200deg, var(--rb-navy-2) 0%, var(--rb-abyss) 100%);
}

.page-about .ab-path__aside .rb-figure {
  margin: 0;
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .ab-path__aside .rb-figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* ---------- 使用场景标签页 ---------- */
.page-about .ab-tabs {
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .ab-tabpanel {
  padding: clamp(22px, 3.4vw, 34px) 0 0;
}

.page-about .ab-tabpanel .rb-h3 {
  margin: 0;
}

.page-about .ab-list {
  list-style: none;
  margin: clamp(14px, 2.4vw, 20px) 0 clamp(18px, 3vw, 24px);
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 64ch;
}

.page-about .ab-list li {
  position: relative;
  padding-left: 22px;
  color: var(--rb-text-dim);
  font-size: 0.94rem;
  line-height: 1.78;
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 1px;
  background: var(--rb-coral);
}

/* ---------- 服务保障 ---------- */
.page-about .ab-trust__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .ab-facts {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--rb-line-faint);
  border: 1px solid var(--rb-line-faint);
}

.page-about .ab-fact {
  background: var(--rb-navy);
  padding: clamp(16px, 2.6vw, 22px);
}

.page-about .ab-fact dt {
  font-family: var(--rb-font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--rb-cyan);
  margin-bottom: 8px;
}

.page-about .ab-fact dd {
  margin: 0;
  color: var(--rb-text-dim);
  font-size: 0.93rem;
  line-height: 1.76;
  word-break: break-word;
}

.page-about .ab-trust__figure {
  margin: 0;
  border: 1px solid var(--rb-line-soft);
  background: var(--rb-navy);
}

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

/* ---------- 结尾行动区 ---------- */
.page-about .ab-cta__inner {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--rb-line);
  background: linear-gradient(120deg, var(--rb-navy-2) 0%, var(--rb-abyss) 72%);
}

.page-about .ab-cta__inner::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--rb-coral) 0%, rgba(255, 95, 61, 0) 100%);
}

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

/* ============================================================
   媒体查询
   ============================================================ */

@media (min-width: 700px) {
  .page-about .ab-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .ab-do__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

@media (min-width: 880px) {
  .page-about .ab-head--split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 44ch);
    align-items: end;
    max-width: none;
  }
}

@media (min-width: 900px) {
  .page-about .ab-trust__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 920px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  }
}

@media (min-width: 960px) {
  .page-about .ab-path__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .ab-path__aside {
    position: sticky;
    top: 96px;
    flex-direction: column;
    align-items: stretch;
  }
}

@media (min-width: 1040px) {
  .page-about .ab-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-card::after {
    transition: none;
  }
}