.page-about {
  --about-rule: rgba(255, 255, 255, 0.22);
  --about-rule-soft: rgba(255, 255, 255, 0.12);
  background: var(--paper);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(1rem, 3vw, 1.5rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 5vw, 3rem) 0 clamp(2rem, 5vw, 3.25rem);
  background:
    radial-gradient(circle at 84% 8%, rgba(232, 138, 26, 0.3), transparent 55%),
    linear-gradient(155deg, var(--jade-deep) 0%, var(--jade) 62%, #1c8f74 100%);
  color: var(--white);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(1.5rem, 4.5vw, 3rem);
  border: 1px solid var(--about-rule);
  background: rgba(8, 55, 45, 0.34);
  box-shadow:
    inset 0 0 0 8px rgba(11, 79, 65, 0.3),
    10px 10px 0 rgba(232, 138, 26, 0.22);
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 8px;
  background: repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.5) 0 1px, transparent 1px 16px);
  opacity: 0.45;
  pointer-events: none;
}

.page-about .about-hero .eyebrow {
  color: var(--amber-light);
}

.page-about .about-hero .eyebrow::before {
  background: var(--amber);
}

.page-about .about-hero__title {
  margin: 0.75rem 0 0;
  max-width: 22ch;
  font-size: clamp(1.85rem, 5.6vw, 3.15rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.86);
}

/* 统计条 */
.page-about .about-stats {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--about-rule);
  background: var(--about-rule);
}

.page-about .about-stats li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.9rem 1rem;
  background: rgba(8, 55, 45, 0.62);
}

.page-about .about-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3.4vw, 1.8rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber-light);
}

.page-about .about-stats__label {
  font-size: 0.8125rem;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.75);
}

/* ---------- 通用分区 ---------- */
.page-about .about-section {
  position: relative;
  padding: clamp(2.5rem, 6vw, 4.25rem) 0;
}

.page-about .about-section--jade {
  background: var(--jade-light);
}

.page-about .about-section--warm {
  background: linear-gradient(180deg, var(--paper) 0%, #FDF0DC 100%);
}

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

.page-about .about-section--ink .section-head h2 {
  color: var(--paper);
}

.page-about .about-section--ink .eyebrow {
  color: var(--amber-light);
}

.page-about .about-section--ink .lede {
  color: rgba(248, 245, 239, 0.78);
}

/* ---------- 媒体容器 ---------- */
.page-about .media-frame {
  margin: 0;
  aspect-ratio: auto;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--stack);
  background: var(--white);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin__text .prose p {
  color: var(--body-soft);
}

.page-about .about-origin__media {
  margin-top: clamp(1.75rem, 4vw, 0rem);
}

/* ---------- 维护方式：标签页 ---------- */
.page-about .about-tabs .tabs__list {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 1.25rem;
  scrollbar-width: thin;
}

.page-about .about-tabs .tabs__btn {
  flex: 0 0 auto;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  padding: 0.6rem 1.05rem;
  border: 1px solid rgba(11, 79, 65, 0.25);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--jade-deep);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-tabs .tabs__btn:hover {
  border-color: var(--jade);
  background: var(--jade-light);
}

.page-about .about-tabs .tabs__btn[aria-selected="true"] {
  background: var(--jade-deep);
  border-color: var(--jade-deep);
  color: var(--white);
}

.page-about .about-tabs .tabs__panel {
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--edge-soft);
  border-left: 3px solid var(--jade);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--stack);
}

.page-about .about-tabs .tabs__panel p {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--body-soft);
}

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

.page-about .about-rhythm {
  margin: 1.25rem 0 0;
  font-size: 0.8125rem;
  letter-spacing: 0.03em;
  color: var(--jade-deep);
}

.page-about .about-worknote {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--amber);
  background: var(--white);
  box-shadow: var(--stack-soft);
}

.page-about .about-worknote p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--body-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team__media {
  margin-bottom: clamp(1.75rem, 4vw, 0rem);
}

.page-about .about-roles {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-about .about-roles li {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px dashed var(--edge);
  font-size: 0.9375rem;
  color: var(--body-soft);
}

.page-about .about-roles__num {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* ---------- 发展历程 ---------- */
.page-about .about-history {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-history__rail ol {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-history__rail a {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--about-rule);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: rgba(248, 245, 239, 0.72);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-history__rail a:hover,
.page-about .about-history__rail a:focus-visible {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--indigo);
}

.page-about .about-history__item {
  scroll-margin-top: 7rem;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-history__item:last-child {
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-history__item summary {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 1rem 0.25rem;
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-history__item summary::-webkit-details-marker {
  display: none;
}

.page-about .about-history__item summary:hover {
  background: rgba(255, 255, 255, 0.05);
  padding-left: 0.6rem;
}

.page-about .about-history__item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-history__item[open] summary::after {
  content: "–";
}

.page-about .about-history__year {
  flex: 0 0 auto;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--amber-light);
}

.page-about .about-history__title {
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-history__item .accordion__body {
  padding: 0 0.25rem 1.15rem;
}

.page-about .about-history__item .accordion__body p {
  margin: 0 0 0.75rem;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(248, 245, 239, 0.76);
}

.page-about .about-history__item .accordion__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-link {
  color: var(--amber-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-link:hover {
  color: var(--amber);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-coverage__media {
  margin-top: clamp(1.75rem, 4vw, 0rem);
}

.page-about .about-regions {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-about .about-regions li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.7rem 0.9rem;
  border-left: 3px solid var(--jade);
  background: var(--jade-light);
  font-size: 0.9375rem;
  color: var(--body-soft);
}

.page-about .about-regions .mono {
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--jade-deep);
}

/* ---------- 合作与共建 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .about-partners__item {
  padding: 1.35rem 1.35rem 1.5rem;
  border-top: 3px solid var(--amber);
}

.page-about .about-partners__item h3 {
  margin: 0.85rem 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--jade-deep);
}

.page-about .about-partners__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--body-soft);
}

/* ---------- 结尾路径 ---------- */
.page-about .about-outro {
  padding-bottom: clamp(3rem, 8vw, 5rem);
}

.page-about .about-outro__actions {
  margin-top: 1.75rem;
}

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

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

@media (min-width: 880px) {
  .page-about .about-origin {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(1.75rem, 4vw, 3rem);
    align-items: start;
  }

  .page-about .about-origin__media {
    margin-top: 0.5rem;
  }

  .page-about .about-team {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(1.75rem, 4vw, 3rem);
    align-items: start;
  }

  .page-about .about-team__media {
    margin-bottom: 0;
  }

  .page-about .about-coverage {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: clamp(1.75rem, 4vw, 3rem);
    align-items: start;
  }

  .page-about .about-coverage__media {
    margin-top: 0.5rem;
  }

  .page-about .about-history {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .about-history__rail {
    position: sticky;
    top: 7rem;
    align-self: start;
  }

  .page-about .about-history__rail ol {
    flex-direction: column;
    gap: 0.25rem;
    overflow: visible;
    margin-bottom: 0;
  }

  .page-about .about-history__rail a {
    width: 100%;
    padding: 0.45rem 0 0.45rem 0.9rem;
    border: none;
    border-left: 2px solid var(--about-rule);
    border-radius: 0;
  }

  .page-about .about-history__rail a:hover,
  .page-about .about-history__rail a:focus-visible {
    background: transparent;
    border-left-color: var(--amber);
    color: var(--amber);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tabs .tabs__btn,
  .page-about .about-history__item summary,
  .page-about .about-history__rail a {
    transition: none;
  }
}
</main>