.page-about {
  --about-spine: 96px;
  --about-panel-pad: clamp(20px, 4vw, 44px);
  background: var(--pearl);
  color: var(--ink);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding: 22px 0 0;
  font-size: .82rem;
  color: var(--mist);
}
.page-about .breadcrumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 0;
}
.page-about .breadcrumbs li {
  display: inline-flex;
  align-items: center;
}
.page-about .breadcrumbs li + li::before {
  content: "/";
  margin: 0 10px;
  color: rgba(107, 130, 153, .5);
}
.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.page-about .breadcrumbs a:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}
.page-about .breadcrumbs [aria-current="page"] {
  color: var(--deep);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 26px 0 0;
}
.page-about .eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--teal);
  background: rgba(23, 195, 178, .12);
  border-radius: var(--pill);
  padding: 6px 14px;
}
.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.8rem, 6.2vw, 3rem);
  line-height: 1.22;
  letter-spacing: .02em;
  color: var(--deep);
  margin: 18px 0 16px;
  max-width: 16em;
}
.page-about .about-hero__title em {
  font-style: normal;
  padding: 0 .04em;
  background: linear-gradient(180deg, transparent 64%, rgba(255, 107, 74, .3) 64%);
}
.page-about .about-hero__lede {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink);
  margin: 0;
  max-width: 44em;
}

/* ---------- 首屏数据条 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.page-about .about-stats li {
  position: relative;
  overflow: hidden;
  background: var(--sand);
  border-radius: var(--radius-md);
  padding: 18px 16px 16px 20px;
}
.page-about .about-stats li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--teal);
}
.page-about .about-stats strong {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.25rem, 4vw, 1.65rem);
  letter-spacing: -.01em;
  color: var(--deep);
}
.page-about .about-stats span {
  display: block;
  margin-top: 4px;
  font-size: .8rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 首屏图 ---------- */
.page-about .about-hero__media {
  margin: 36px 0 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

/* ---------- 主壳与左侧时间轴 ---------- */
.page-about .about-shell {
  padding-top: 56px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}
.page-about .about-spine {
  display: none;
}
.page-about .about-spine__inner {
  position: sticky;
  top: calc(var(--header-h) + 40px);
}
.page-about .about-spine__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 46px;
}
.page-about .about-spine__node {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--deep);
  background: var(--pearl);
  border: 1.5px solid rgba(23, 195, 178, .5);
}
.page-about .about-spine__node::after {
  content: "";
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  width: 1.5px;
  height: 38px;
  background: linear-gradient(180deg, rgba(23, 195, 178, .5), rgba(23, 195, 178, .06));
}
.page-about .about-spine__node:last-child::after {
  display: none;
}

/* ---------- 面板与区块 ---------- */
.page-about .about-flow {
  min-width: 0;
}
.page-about .about-section {
  border-radius: var(--radius-xl);
  padding: var(--about-panel-pad);
  margin-bottom: 22px;
  background: var(--pearl);
  border: 1px solid var(--line-soft);
}
.page-about .about-section:last-child {
  margin-bottom: 0;
}
.page-about .about-section--sand {
  background: var(--sand);
  border-color: transparent;
}
.page-about .about-section--deep {
  background: var(--deep);
  border-color: transparent;
}
.page-about .about-section--midnight {
  background: var(--midnight);
  border-color: transparent;
}

.page-about .section-head {
  margin-bottom: 24px;
}
.page-about .phase {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--coral);
  background: rgba(255, 107, 74, .1);
  border-radius: var(--pill);
  padding: 5px 12px;
  margin: 0;
}
.page-about .about-section h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.3rem, 4.6vw, 1.95rem);
  line-height: 1.34;
  letter-spacing: .01em;
  color: var(--deep);
  margin: 14px 0 0;
  max-width: 22em;
}
.page-about .about-section h3 {
  font-family: var(--font-head);
  font-weight: 800;
  color: var(--deep);
}
.page-about .about-lede {
  font-size: .98rem;
  line-height: 1.9;
  color: var(--ink);
  margin: 0 0 24px;
  max-width: 46em;
}

.page-about .about-section--deep h2,
.page-about .about-section--midnight h2,
.page-about .about-section--deep h3,
.page-about .about-section--midnight h3 {
  color: var(--pearl);
}
.page-about .about-section--deep .phase,
.page-about .about-section--midnight .phase {
  color: var(--teal);
  background: rgba(23, 195, 178, .14);
}
.page-about .about-section--deep .about-lede,
.page-about .about-section--midnight .about-lede {
  color: rgba(247, 245, 240, .82);
}

/* ---------- 图文分栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}
.page-about .about-split__main p {
  font-size: .97rem;
  line-height: 1.92;
  color: var(--ink);
  margin: 0 0 18px;
}
.page-about .about-split__main p:last-child {
  margin-bottom: 0;
}
.page-about .note {
  background: var(--sand);
  border-left: 3px solid var(--coral);
  border-radius: var(--radius-md);
  padding: 20px 22px;
}
.page-about .note p {
  font-size: .88rem;
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 8px;
}
.page-about .note p:last-child {
  margin-bottom: 0;
  color: var(--mist);
}
.page-about .note strong {
  display: block;
  font-family: var(--font-head);
  font-weight: 800;
  color: var(--deep);
}

/* ---------- 延伸入口 ---------- */
.page-about .extend {
  margin: 26px 0 0;
}
.page-about .extend a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 22px;
  border-radius: var(--pill);
  background: var(--deep);
  color: var(--pearl);
  font-size: .86rem;
  font-weight: 600;
  text-decoration: none;
  transition: background .22s ease, transform .22s ease;
}
.page-about .extend a::after {
  content: "→";
  font-family: var(--font-mono);
  transition: transform .22s ease;
}
.page-about .extend a:hover {
  background: var(--coral);
  transform: translateY(-2px);
}
.page-about .extend a:hover::after {
  transform: translateX(4px);
}
.page-about .about-section--deep .extend a,
.page-about .about-section--midnight .extend a {
  background: var(--coral);
  color: #ffffff;
}
.page-about .about-section--deep .extend a:hover,
.page-about .about-section--midnight .extend a:hover {
  background: var(--coral-soft);
  color: var(--deep);
}

/* ---------- 服务版图 ---------- */
.page-about .about-map {
  margin: 0 0 26px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--midnight);
}
.page-about .about-map img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .about-map figcaption {
  padding: 14px 20px;
  background: rgba(247, 245, 240, .07);
  color: rgba(247, 245, 240, .78);
  font-size: .82rem;
  line-height: 1.75;
}
.page-about .about-reach-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .about-reach-list li {
  background: rgba(247, 245, 240, .07);
  border: 1px solid rgba(247, 245, 240, .13);
  border-radius: var(--radius-lg);
  padding: 22px 20px 20px;
}
.page-about .about-reach__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.6rem;
  letter-spacing: -.01em;
  color: var(--gold);
  margin-bottom: 6px;
}
.page-about .about-reach-list h3 {
  font-size: 1rem;
  margin: 0 0 8px;
}
.page-about .about-reach-list p {
  font-size: .86rem;
  line-height: 1.82;
  color: rgba(247, 245, 240, .72);
  margin: 0;
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 20px 22px 24px;
  border-radius: var(--radius-lg);
  background: var(--sand);
  border: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease, transform .25s ease;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--teal);
}
.page-about .about-timeline__item:hover {
  border-color: rgba(23, 195, 178, .55);
  box-shadow: var(--shadow-card);
  transform: translateX(4px);
}
.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .04em;
  color: var(--coral);
}
.page-about .about-timeline__body h3 {
  font-size: 1.02rem;
  margin: 0 0 8px;
}
.page-about .about-timeline__body p {
  font-size: .89rem;
  line-height: 1.86;
  color: var(--mist);
  margin: 0;
}

/* ---------- 团队与客服 ---------- */
.page-about .about-team-media {
  margin: 0 0 26px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.page-about .about-team-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .about-tabs {
  background: var(--pearl);
  border-radius: var(--radius-lg);
  padding: 18px 18px 6px;
}
.page-about .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.page-about .tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line-soft);
  background: transparent;
  color: var(--deep);
  border-radius: var(--pill);
  padding: 9px 18px;
  font-family: var(--font-body);
  font-size: .86rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.page-about .tab .mono {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--coral);
}
.page-about .tab:hover {
  border-color: var(--coral);
}
.page-about .tab[aria-selected="true"] {
  background: var(--coral);
  border-color: var(--coral);
  color: #ffffff;
}
.page-about .tab[aria-selected="true"] .mono {
  color: rgba(255, 255, 255, .86);
}
.page-about .tab:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}
.page-about .tabpanel {
  padding-bottom: 14px;
}
.page-about .tabpanel p {
  font-size: .92rem;
  line-height: 1.88;
  color: var(--ink);
  margin: 0 0 12px;
}
.page-about .tabpanel p:last-child {
  margin-bottom: 0;
  color: var(--mist);
}

/* ---------- 售后承诺 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}
.page-about .about-steps li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  background: rgba(247, 245, 240, .06);
  border: 1px solid rgba(247, 245, 240, .14);
  border-radius: var(--radius-md);
  padding: 15px 16px;
  font-size: .88rem;
  line-height: 1.6;
  color: var(--pearl);
}
.page-about .about-steps .mono {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--coral);
}
.page-about .about-plans {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 22px;
}
.page-about .about-plan {
  background: rgba(247, 245, 240, .06);
  border: 1px solid rgba(247, 245, 240, .14);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
}
.page-about .about-plan h3 {
  font-size: 1.06rem;
  margin: 0 0 8px;
}
.page-about .about-plan__price {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -.01em;
  color: var(--gold);
  margin: 0 0 14px;
}
.page-about .about-plan p {
  font-size: .88rem;
  line-height: 1.82;
  color: rgba(247, 245, 240, .78);
  margin: 0 0 12px;
}
.page-about .about-plan .about-plan__cond {
  font-size: .82rem;
  line-height: 1.78;
  color: rgba(247, 245, 240, .6);
  border-top: 1px solid rgba(247, 245, 240, .12);
  padding-top: 12px;
  margin-bottom: 0;
}
.page-about .about-aftercare-note {
  font-size: .9rem;
  line-height: 1.9;
  color: rgba(247, 245, 240, .82);
  margin: 0;
}
.page-about .about-aftercare-note a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(23, 195, 178, .5);
}
.page-about .about-aftercare-note a:hover {
  color: var(--coral-soft);
  border-bottom-color: var(--coral-soft);
}

/* ---------- 合作伙伴 ---------- */
.page-about .about-tags {
  list-style: none;
  margin: 0 0 26px;
  padding: 0 0 6px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-about .about-tags li {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--deep);
  background: var(--pearl);
  border: 1px solid var(--line-soft);
  border-radius: var(--pill);
  padding: 8px 18px;
}
.page-about .about-honors {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}
.page-about .about-honor {
  background: var(--pearl);
  border-radius: var(--radius-lg);
  padding: 22px 22px 20px;
  border-left: 3px solid var(--gold);
}
.page-about .about-honor__label {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--gold);
  margin: 0 0 8px;
}
.page-about .about-honor h3 {
  font-size: 1rem;
  margin: 0 0 8px;
}
.page-about .about-honor p:last-child {
  font-size: .87rem;
  line-height: 1.82;
  color: var(--mist);
  margin: 0;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-reach-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-plans {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-honors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-timeline__item {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
  .page-about .about-timeline__year {
    padding-top: 2px;
  }
}

/* ---------- 桌面：左侧时间轴就位 ---------- */
@media (min-width: 1024px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-spine) minmax(0, 1fr);
    gap: 56px;
  }
  .page-about .about-spine {
    display: block;
  }
  .page-about .about-spine__inner {
    padding-top: 6px;
  }
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }
  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
  }
  .page-about .about-steps li {
    flex-direction: column;
    gap: 8px;
  }
  .page-about .about-section h2 {
    font-size: clamp(1.5rem, 2.4vw, 2rem);
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero__lede {
    font-size: 1.05rem;
  }
  .page-about .about-split__main p {
    font-size: 1rem;
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item,
  .page-about .extend a,
  .page-about .extend a::after,
  .page-about .tab,
  .page-about .breadcrumbs a {
    transition: none;
  }
  .page-about .about-timeline__item:hover,
  .page-about .extend a:hover {
    transform: none;
  }
}