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

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

.page-about .figure__media {
  overflow: hidden;
  background: var(--card);
  border: 2px solid var(--wine);
  box-shadow: 8px 8px 0 rgba(74, 20, 32, .16);
}

.page-about .figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mauve);
}

/* ---------- 开篇 ---------- */
.page-about .about-open__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-open__text .t-xl {
  margin: 10px 0 0;
}

.page-about .about-open__text .lede {
  margin-top: 18px;
}

.page-about .about-open__sub {
  margin-top: 16px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mauve);
}

.page-about .about-open__figure {
  margin: 0;
}

.page-about .about-open__figure .figure__media {
  aspect-ratio: 3 / 2;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--wine);
}

.page-about .about-stat {
  padding: 16px 10px 0;
  border-left: 1px solid var(--line-soft);
}

.page-about .about-stat:first-child {
  padding-left: 0;
  border-left: 0;
}

.page-about .about-stat__num {
  display: block;
  font-size: 26px;
  line-height: 1.1;
  color: var(--wine);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mauve);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  background: var(--cream);
  border-top: 2px solid var(--wine);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 10px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background-color .18s ease, border-color .18s ease;
}

.page-about .about-index__link .mono {
  font-size: 13px;
  color: var(--gold);
}

.page-about .about-index__link:hover {
  border-color: var(--gold);
  background: var(--card);
}

.page-about .about-index__link[aria-current="true"] {
  border-color: var(--wine);
  background: var(--card);
}

/* ---------- 时间线 ---------- */
.page-about .section--plum .eyebrow {
  color: var(--gold);
}

.page-about .about-story h2 {
  margin: 10px 0 0;
  color: var(--cream);
}

.page-about .about-story__lede {
  max-width: 68ch;
  margin-top: 16px;
  color: var(--gold-light);
}

.page-about .about-story__body {
  max-width: 74ch;
  margin: 22px 0 30px;
  color: var(--gold-light);
}

.page-about .about-track {
  display: flex;
  gap: 18px;
  margin: 28px 0 0;
  padding: 6px 2px 26px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.page-about .about-track > li {
  flex: 0 0 78%;
  max-width: 300px;
  scroll-snap-align: start;
}

.page-about .about-node {
  height: 100%;
  padding: 18px 18px 20px;
  background: var(--card);
  border: 2px solid var(--wine-deep);
  box-shadow: 6px 6px 0 rgba(74, 20, 32, .55);
  outline-offset: 3px;
}

.page-about .about-node::before {
  content: "";
  display: block;
  width: 10px;
  height: 10px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .about-node__year {
  display: block;
  font-size: 22px;
  letter-spacing: .04em;
  color: var(--wine);
}

.page-about .about-node__title {
  margin: 8px 0 0;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-node__note {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .25s ease, opacity .2s ease;
}

.page-about .about-node:hover .about-node__note,
.page-about .about-node:focus .about-node__note,
.page-about .about-node:focus-within .about-node__note {
  max-height: 16em;
  opacity: 1;
}

.page-about .about-story__figure {
  margin: 8px 0 0;
}

.page-about .about-story__figure .figure__media {
  aspect-ratio: 12 / 5;
  border-color: var(--gold);
  box-shadow: 8px 8px 0 rgba(20, 16, 15, .35);
}

.page-about .about-story__figure .figure__cap {
  color: var(--mauve);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-team__intro h2 {
  margin: 10px 0 0;
}

.page-about .about-team__intro p {
  margin-top: 16px;
  color: var(--mauve);
}

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

.page-about .about-team__figure .figure__media {
  aspect-ratio: 4 / 3;
}

.page-about .about-team__roles {
  display: grid;
  gap: 20px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-role {
  padding-top: 16px;
  border-top: 3px solid var(--wine);
}

.page-about .about-role__title {
  margin: 0;
  font-family: var(--serif);
  font-size: 20px;
  color: var(--ink);
}

.page-about .about-role__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 服务网络 ---------- */
.page-about .about-network h2 {
  margin: 10px 0 0;
}

.page-about .about-network > .shell > p {
  max-width: 68ch;
  margin-top: 16px;
  color: var(--mauve);
}

.page-about .about-net {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-region {
  background: var(--card);
  border: 2px solid var(--wine);
  transition: box-shadow .2s ease, transform .2s ease;
}

.page-about .about-region[open] {
  box-shadow: 6px 6px 0 rgba(74, 20, 32, .18);
}

.page-about .about-region__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--serif);
  font-size: 17px;
  color: var(--ink);
}

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

.page-about .about-region__dot {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(87, 201, 161, .25);
}

.page-about .about-region__name {
  flex: 1 1 auto;
}

.page-about .about-region__state {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mauve);
}

.page-about .about-region__body {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
}

/* ---------- 三条业务线 ---------- */
.page-about .about-lines-wrap h2 {
  margin: 10px 0 0;
}

.page-about .about-lines {
  display: grid;
  gap: 20px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-line {
  padding: 22px;
  background: var(--card);
  border: 2px solid var(--wine-deep);
  box-shadow: 7px 7px 0 rgba(74, 20, 32, .18);
}

.page-about .about-line__title {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-line__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 资料库 ---------- */
.page-about .about-library h2 {
  margin: 10px 0 0;
  color: var(--cream);
}

.page-about .about-library__grid {
  margin-top: 30px;
}

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

.page-about .about-library .timeline__item {
  position: relative;
  padding: 0 0 22px 20px;
  border-left: 2px solid var(--gold);
}

.page-about .about-library .timeline__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold-light);
}

.page-about .about-library .timeline__date {
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--gold);
}

.page-about .about-library .timeline__item p {
  margin: 8px 0 0;
  color: var(--cream);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-library__note {
  margin-top: 6px;
  padding: 16px 18px;
  border: 1px solid rgba(232, 211, 160, .3);
}

.page-about .about-library__note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--gold-light);
}

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

.page-about .about-library .rule-item {
  margin: 0 0 12px;
  padding: 14px 16px;
  background: rgba(245, 239, 230, .06);
  border: 1px solid rgba(232, 211, 160, .26);
  border-left: 3px solid var(--gold);
}

.page-about .about-library .rule-item__no {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--gold);
}

.page-about .about-library .rule-item__title {
  margin: 6px 0 6px;
  font-family: var(--serif);
  font-size: 17px;
  color: var(--cream);
}

.page-about .about-library .rule-item__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--gold-light);
}

/* ---------- 选择理由 ---------- */
.page-about .about-why-wrap h2 {
  margin: 10px 0 0;
}

.page-about .about-why {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--wine);
}

.page-about .about-why__item {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-why__no {
  font-size: 24px;
  color: var(--gold);
}

.page-about .about-why__title {
  margin: 0;
  font-family: var(--serif);
  font-size: 21px;
  color: var(--ink);
}

.page-about .about-why__text {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 合作与口碑 ---------- */
.page-about .about-partners {
  background: var(--card);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-partners h2 {
  margin: 10px 0 0;
}

.page-about .about-partners__grid > div > p {
  margin-top: 16px;
  color: var(--ink);
}

.page-about .about-partners__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-partners__big {
  margin: 12px 0 8px;
  font-size: 26px;
  letter-spacing: .02em;
  color: var(--wine);
}

.page-about .about-partners__aside .card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-partners__contact {
  font-size: 15px;
  line-height: 1.75;
  color: var(--mauve);
}

/* ---------- 结尾 ---------- */
.page-about .about-close {
  background: var(--wine);
}

.page-about .about-close h2 {
  margin: 0;
  color: var(--cream);
}

.page-about .about-close p {
  max-width: 72ch;
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--gold-light);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-net {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 760px) {
  .page-about .about-why__item {
    grid-template-columns: 88px 1fr;
    gap: 24px;
    align-items: start;
  }

  .page-about .about-track > li {
    flex: 0 0 300px;
  }
}

@media (min-width: 900px) {
  .page-about .about-open__grid {
    grid-template-columns: 1.1fr .9fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.15fr .85fr;
    gap: 40px;
    align-items: center;
  }

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

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

  .page-about .about-line:nth-child(2) {
    margin-top: 32px;
  }

  .page-about .about-line:nth-child(3) {
    margin-top: 12px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: 1.2fr .8fr;
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-net {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (hover: none) {
  .page-about .about-node__note {
    max-height: none;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__note,
  .page-about .about-region,
  .page-about .about-index__link {
    transition: none;
  }

  .page-about .about-node__note {
    max-height: none;
    opacity: 1;
  }
}