.page-about {
  --about-line: rgba(14, 27, 42, 0.14);
  --about-line-light: rgba(243, 239, 231, 0.18);
  --about-amber-soft: rgba(242, 163, 60, 0.28);
  --about-gap: clamp(2rem, 5vw, 3.5rem);
}

.page-about .section {
  padding: clamp(3.25rem, 8vw, 6.5rem) 0;
}

.page-about .about-crumbs {
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--stone);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-crumbs a {
  color: var(--paper-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.22s ease, color 0.22s ease;
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-about .about-crumbs .breadcrumbs__sep {
  color: rgba(243, 239, 231, 0.35);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  background:
    radial-gradient(1200px 520px at 88% -10%, rgba(63, 193, 176, 0.14), transparent 62%),
    radial-gradient(760px 420px at 6% 0%, rgba(242, 163, 60, 0.12), transparent 58%),
    var(--ink);
  color: var(--paper);
  padding-bottom: clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}

.page-about .about-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 1.25rem;
}

.page-about .about-hero h1 {
  font-size: clamp(2rem, 5.2vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.16;
  margin: 0;
  color: var(--paper);
  max-width: 22ch;
}

.page-about .about-hero__intro {
  margin: 1.5rem 0 0;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--paper-soft);
  max-width: 52ch;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 2rem 0 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--about-line-light);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 1.5rem;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3vw, 1.6rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--amber);
  line-height: 1.2;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--stone);
}

.page-about .about-hero__actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
}

.page-about .about-hero__actions .button {
  text-decoration: none;
}

.page-about .about-hero__figure {
  margin: 0;
  padding: 8px;
  border: 1px solid var(--about-amber-soft);
  border-radius: var(--radius);
  background: rgba(8, 17, 28, 0.6);
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.42);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

/* ---------- 品牌故事 ---------- */

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

.page-about .about-story__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-story__aside {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--clay);
}

.page-about .about-story__year {
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 8vw, 4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--clay);
  margin: 0;
}

.page-about .about-story__aside-text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-story .section__title {
  margin: 0 0 1.5rem;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.28;
  color: var(--ink);
  max-width: 26ch;
}

.page-about .about-story .prose p {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--ink-soft);
  margin: 0 0 1.25rem;
}

.page-about .about-story .prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-story__notes {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-story__notes li {
  background: var(--paper);
  padding: 1rem 1.125rem;
  display: flex;
  align-items: baseline;
  gap: 0.875rem;
}

.page-about .about-story__note-num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--clay);
  letter-spacing: 0.04em;
  flex: 0 0 auto;
  min-width: 3.5rem;
}

.page-about .about-story__note-text {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 服务范围 ---------- */

.page-about .about-scope {
  background: var(--midnight);
  color: var(--paper);
}

.page-about .about-scope__head {
  max-width: 62ch;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.page-about .about-scope .section__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
}

.page-about .about-scope .section__title {
  margin: 0 0 1rem;
  font-size: clamp(1.6rem, 3.8vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.26;
  color: var(--paper);
}

.page-about .about-scope .section__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-about .about-scope__grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.page-about .about-scope__card {
  background: rgba(243, 239, 231, 0.05);
  border: 1px solid var(--about-line-light);
  border-radius: var(--radius);
  padding: 1.5rem 1.375rem;
  transition: transform 0.24s ease, border-color 0.24s ease, background 0.24s ease;
}

.page-about .about-scope__card:hover,
.page-about .about-scope__card:focus-within {
  transform: translateY(-2px);
  border-color: var(--amber);
  background: rgba(243, 239, 231, 0.08);
}

.page-about .about-scope__card .tag {
  display: inline-block;
  margin-bottom: 1rem;
}

.page-about .about-scope__card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-scope__card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: var(--paper-soft);
}

/* ---------- 版本演进 ---------- */

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

.page-about .about-timeline__head {
  max-width: 60ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-timeline .section__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--clay);
  margin-bottom: 1rem;
}

.page-about .about-timeline .section__title {
  margin: 0 0 1rem;
  font-size: clamp(1.6rem, 3.8vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.26;
  color: var(--ink);
}

.page-about .about-timeline .section__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-timeline__figure {
  margin: 0 0 clamp(2rem, 5vw, 3rem);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--about-line);
  object-fit: cover;
}

.page-about .about-timeline__figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-timeline__item {
  display: grid;
  gap: 0.75rem;
  padding: 1.5rem 0 1.5rem 1.125rem;
  border-bottom: 1px solid var(--about-line);
  border-left: 2px solid transparent;
  transition: border-color 0.28s ease, background 0.28s ease;
}

.page-about .about-timeline__item:hover,
.page-about .about-timeline__item:focus-within {
  border-left-color: var(--clay);
  background: rgba(164, 90, 63, 0.05);
}

.page-about .about-timeline__marker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.875rem;
}

.page-about .about-timeline__node {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--clay);
  flex: 0 0 auto;
}

.page-about .about-timeline__node--now {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 163, 60, 0.22);
}

.page-about .about-timeline__stage {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--moss);
  font-weight: 700;
}

.page-about .about-timeline__ver {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--stone);
  margin-left: auto;
}

.page-about .about-timeline__content h3 {
  margin: 0 0 0.625rem;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-timeline__content p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 62ch;
}

/* ---------- 团队与运营 ---------- */

.page-about .about-team {
  background:
    radial-gradient(900px 420px at 10% 0%, rgba(91, 111, 90, 0.24), transparent 60%),
    var(--ink);
  color: var(--paper);
}

.page-about .about-team__head {
  max-width: 60ch;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.page-about .about-team .section__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
}

.page-about .about-team .section__title {
  margin: 0 0 1rem;
  font-size: clamp(1.6rem, 3.8vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.26;
  color: var(--paper);
}

.page-about .about-team .section__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-about .about-team__layout {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-team__figure {
  margin: 0;
  order: 2;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--about-line-light);
  object-fit: cover;
}

.page-about .about-team__tabs .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-bottom: 1.125rem;
  border-bottom: 1px solid var(--about-line-light);
  margin-bottom: 1.5rem;
}

.page-about .about-team__tabs .tab {
  appearance: none;
  -webkit-appearance: none;
  font-family: inherit;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  padding: 0.5rem 1.125rem;
  border-radius: 999px;
  border: 1px solid var(--about-line-light);
  background: transparent;
  color: var(--paper-soft);
  cursor: pointer;
  transition: background 0.24s ease, border-color 0.24s ease, color 0.24s ease;
}

.page-about .about-team__tabs .tab:hover {
  border-color: var(--amber);
  color: var(--amber);
}

.page-about .about-team__tabs .tab[aria-selected="true"] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-team__tabs .tab:focus-visible,
.page-about .about-timeline__item a:focus-visible,
.page-about .about-cred__foot a:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.page-about .about-team__panel p {
  margin: 0 0 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--paper-soft);
  max-width: 60ch;
}

.page-about .about-team__panel[hidden] {
  display: none;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--paper-soft);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
}

/* ---------- 资质与合规 ---------- */

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

.page-about .about-cred__head {
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-cred .section__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--moss);
  margin-bottom: 1rem;
}

.page-about .about-cred .section__title {
  margin: 0;
  font-size: clamp(1.6rem, 3.8vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.26;
  color: var(--ink);
}

.page-about .about-cred__grid {
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
  grid-template-columns: 1fr;
}

.page-about .about-cred__item {
  background: var(--paper);
  padding: 1.5rem 1.375rem;
  border-top: 3px solid var(--paper);
  transition: border-color 0.24s ease, background 0.24s ease;
}

.page-about .about-cred__item:hover {
  border-top-color: var(--amber);
  background: rgba(242, 163, 60, 0.05);
}

.page-about .about-cred__num {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--clay);
  word-break: break-word;
}

.page-about .about-cred__item h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-cred__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-cred__foot {
  margin: 1.75rem 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-cred__foot a {
  color: var(--clay);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line);
  transition: border-color 0.22s ease, color 0.22s ease;
}

.page-about .about-cred__foot a:hover,
.page-about .about-cred__foot a:focus-visible {
  color: var(--amber-dark);
  border-bottom-color: var(--amber-dark);
}

/* ---------- 长期陪伴 ---------- */

.page-about .about-promise {
  background: linear-gradient(96deg, var(--amber) 0%, #F6B357 58%, #F0C078 100%);
  color: var(--ink);
}

.page-about .about-promise__inner {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  align-items: start;
}

.page-about .about-promise__eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(14, 27, 42, 0.62);
  margin: 0 0 0.875rem;
}

.page-about .about-promise h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.28;
  color: var(--ink);
  max-width: 24ch;
}

.page-about .about-promise p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(14, 27, 42, 0.82);
  max-width: 62ch;
}

.page-about .about-promise__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-promise__actions .button {
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  text-decoration: none;
  transition: background 0.24s ease, transform 0.24s ease;
}

.page-about .about-promise__actions .button:hover,
.page-about .about-promise__actions .button:focus-visible {
  background: var(--midnight);
  transform: translateY(-2px);
}

.page-about .about-promise__actions .button:focus-visible {
  outline: 2px solid var(--midnight);
  outline-offset: 2px;
}

/* ---------- 显现动效 ---------- */

.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }

  .page-about .about-story__grid {
    grid-template-columns: minmax(0, 2fr) minmax(0, 6fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-story__aside {
    border-bottom: none;
    border-left: 2px solid var(--clay);
    padding: 0 0 0 1.25rem;
    align-self: start;
    position: sticky;
    top: 1.5rem;
  }

  .page-about .about-timeline__item {
    grid-template-columns: minmax(0, 3fr) minmax(0, 5fr);
    gap: 2rem;
    padding: 1.875rem 0 1.875rem 1.5rem;
  }

  .page-about .about-timeline__marker {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .page-about .about-timeline__ver {
    margin-left: 0;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 3fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    order: 0;
    position: sticky;
    top: 1.5rem;
  }

  .page-about .about-promise__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 3fr);
    align-items: center;
  }

  .page-about .about-promise__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1060px) {
  .page-about .about-scope__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-scope__card,
  .page-about .about-promise__actions .button,
  .page-about .about-cred__item {
    transition: none;
  }

  .page-about .about-scope__card:hover,
  .page-about .about-promise__actions .button:hover {
    transform: none;
  }
}
</main>