.page-about {
  --about-maxw: 36em;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs-row {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-open {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(115deg, var(--sand-light) 0%, var(--sand-light) 46%, transparent 46%),
    var(--sand);
  border-bottom: 1px solid var(--line);
}

.page-about .about-open::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -80px;
  width: 340px;
  height: 340px;
  border: 1px solid var(--xq-light);
  border-radius: 50%;
  opacity: .55;
  pointer-events: none;
}

.page-about .about-open__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-top: 40px;
  padding-bottom: 48px;
}

.page-about .about-open__rail {
  display: none;
}

.page-about .about-open__index {
  font-size: 13px;
  font-weight: 500;
  color: var(--slate);
  margin: 0 0 10px;
  letter-spacing: .01em;
}

.page-about .about-open__index .meta {
  margin-right: 8px;
  color: var(--xq-ink);
}

.page-about .about-open__body h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 32px;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 10px 0 18px;
  max-width: 20em;
}

.page-about .about-open__lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 34em;
  margin: 0 0 26px;
}

.page-about .about-open__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 26px;
}

.page-about .fact {
  background: var(--paper);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .fact__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 26px;
  letter-spacing: .02em;
  color: var(--xq-deep);
  line-height: 1.1;
}

.page-about .fact__label {
  font-size: 13px;
  color: var(--slate);
}

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

/* ---------- 锚点导航 ---------- */
.page-about .about-anchors {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.page-about .about-anchors__inner {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-top: 8px;
  padding-bottom: 8px;
}

.page-about .about-anchors__inner::-webkit-scrollbar {
  display: none;
}

.page-about .anchor-link {
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 500;
  color: var(--slate);
  text-decoration: none;
  padding: 7px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-about .anchor-link:hover,
.page-about .anchor-link:focus-visible {
  color: var(--xq-ink);
  border-color: var(--xq-light);
}

.page-about .anchor-link[aria-current="true"] {
  background: var(--xq-deep);
  border-color: var(--xq-deep);
  color: var(--paper);
}

/* ---------- 通用标题 ---------- */
.page-about .about-h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 25px;
  line-height: 1.35;
  color: var(--ink);
  margin: 6px 0 18px;
  letter-spacing: -0.005em;
}

.page-about .about-block,
.page-about .about-timeline,
.page-about .about-team,
.page-about .about-coverage,
.page-about .about-partners,
.page-about .about-compliance {
  padding-top: 52px;
  padding-bottom: 52px;
}

/* ---------- 01 业务线 ---------- */
.page-about .about-lines {
  margin-top: 30px;
}

.page-about .about-lines__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.page-about .line-tab {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--xq-deep);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 18px;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .line-tab:hover {
  border-color: var(--xq-light);
  background: var(--sand-light);
}

.page-about .line-tab.is-active {
  background: var(--xq-deep);
  border-color: var(--xq-deep);
  color: var(--paper);
}

.page-about .line-tab:focus-visible {
  outline: 2px solid var(--grape);
  outline-offset: 2px;
}

.page-about .line-panel {
  border-left: 3px solid var(--xq);
  background: var(--paper);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow-1);
  padding: 22px 24px;
  max-width: 46em;
}

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

.page-about .line-panel h3 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-about .line-panel p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline {
  background: var(--sand-light);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 34px;
}

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

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  max-width: 380px;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.page-about .about-timeline__intro p {
  margin: 0;
}

.page-about .timeline {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  counter-reset: tl;
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 0 0 30px 22px;
  border-left: 1px solid var(--xq-light);
}

.page-about .timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--paper);
  border: 2px solid var(--xq);
  border-radius: 50%;
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .timeline__item:hover::before,
.page-about .timeline__item:focus-within::before {
  background: var(--xq);
  transform: scale(1.15);
}

.page-about .timeline__item--current::before {
  border-color: var(--grape);
  background: var(--grape);
}

.page-about .timeline__year {
  font-size: 15px;
}

.page-about .timeline__year .meta {
  font-size: 15px;
  color: var(--xq-deep);
}

.page-about .timeline__body h3 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 8px;
  line-height: 1.5;
}

.page-about .timeline__body p {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
  max-width: 34em;
}

.page-about .timeline__body .aside-note {
  margin-top: 14px;
  max-width: 30em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--xq-ink);
  background: var(--paper);
  border-left: 2px solid var(--xq-light);
  padding: 12px 16px;
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* ---------- 03 团队 ---------- */
.page-about .about-team__figure {
  margin: 0 0 28px;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 25 / 16;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--sand-light);
}

.page-about .team-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 26px;
}

.page-about .team-band__seg {
  background: var(--paper);
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .team-band__seg::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
}

.page-about .team-band__seg--tech::before { background: var(--xq); }
.page-about .team-band__seg--edit::before { background: var(--xq-deep); }
.page-about .team-band__seg--cs::before { background: var(--grape); }
.page-about .team-band__seg--brand::before { background: var(--sand); }

.page-about .team-band__seg:hover {
  background: var(--sand-light);
  transform: translateY(-2px);
}

.page-about .team-band__count {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 30px;
  letter-spacing: .02em;
  color: var(--ink);
  line-height: 1;
}

.page-about .team-band__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-band__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .about-team__workflow {
  border-top: 2px solid var(--ink);
  padding-top: 20px;
  max-width: 46em;
}

.page-about .about-team__workflow h3 {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-about .about-team__workflow p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 04 服务地区 ---------- */
.page-about .about-coverage {
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.page-about .about-coverage__grid {
  align-items: start;
}

.page-about .coverage-card {
  background: var(--xq-deep);
  border: 1px solid var(--xq-deep);
  color: var(--paper);
  padding: 22px 22px 20px;
}

.page-about .coverage-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.page-about .coverage-card__label {
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--xq-light);
  margin: 0 0 6px;
}

.page-about .coverage-card__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 32px;
  letter-spacing: .02em;
  line-height: 1.1;
  margin: 0 0 6px;
  color: #fff;
}

.page-about .coverage-card__num span {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--xq-light);
  margin-left: 6px;
  letter-spacing: 0;
}

.page-about .coverage-card__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--xq-light);
  margin: 0;
}

.page-about .coverage-card .rule {
  border: 0;
  border-top: 1px solid rgba(168, 211, 218, .35);
  margin: 18px 0;
}

.page-about .about-coverage__figure {
  margin: 32px 0 0;
}

.page-about .about-coverage__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 11 / 7;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--sand-light);
}

.page-about .coverage-steps {
  margin-top: 32px;
}

.page-about .coverage-steps__title {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 16px;
}

.page-about .coverage-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .coverage-steps__list li {
  background: var(--paper);
  padding: 18px 20px;
}

.page-about .coverage-steps__list .meta {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--grape);
}

.page-about .coverage-steps__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-partners {
  background: var(--sand-light);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 28px;
}

.page-about .partner-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 22px 22px 24px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .partner-card:hover {
  transform: translateY(-2px);
  border-color: var(--xq-light);
  box-shadow: var(--shadow-2);
}

.page-about .partner-card .meta {
  color: var(--xq-ink);
  margin: 0 0 10px;
  display: block;
}

.page-about .partner-card h3 {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-about .partner-card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 06 资质与联系 ---------- */
.page-about .compliance-box {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow-1);
  padding: 26px 24px;
}

.page-about .compliance-box__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .compliance-list {
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--xq);
}

.page-about .compliance-list > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .compliance-list dt {
  font-size: 13px;
  color: var(--slate);
}

.page-about .compliance-list dd {
  margin: 0;
  font-size: 15px;
  color: var(--ink);
  line-height: 1.7;
}

.page-about .compliance-list dd.meta {
  color: var(--xq-deep);
}

.page-about .compliance-box__back {
  display: inline-block;
  margin-top: 18px;
  font-size: 13px;
  color: var(--xq-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--xq-light);
  padding-bottom: 2px;
}

.page-about .compliance-box__back:hover {
  border-bottom-color: var(--xq-ink);
}

.page-about .about-outro {
  margin-top: 34px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.page-about .about-outro p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
  max-width: 40em;
  margin: 0 0 16px;
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
}

.page-about .about-outro__links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--xq-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--xq-light);
  padding-bottom: 3px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-outro__links a:hover {
  color: var(--grape);
  border-bottom-color: var(--grape);
}

/* ---------- 媒体查询：平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-open__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-h2 {
    font-size: 28px;
  }

  .page-about .about-open__body h1 {
    font-size: 40px;
  }

  .page-about .timeline__item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 0 28px;
    padding-left: 26px;
  }

  .page-about .timeline__year {
    text-align: right;
    padding-right: 4px;
  }

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

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

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

  .page-about .compliance-list > div {
    grid-template-columns: 140px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

/* ---------- 媒体查询：桌面 ---------- */
@media (min-width: 1000px) {
  .page-about .about-open__inner {
    grid-template-columns: 2fr 7fr 3fr;
    gap: 32px;
    padding-top: 62px;
    padding-bottom: 70px;
  }

  .page-about .about-open__rail {
    display: block;
    padding-top: 6px;
  }

  .page-about .about-open__body {
    grid-column: 2 / 3;
  }

  .page-about .about-open__body h1 {
    font-size: 46px;
    line-height: 1.24;
  }

  .page-about .about-block,
  .page-about .about-timeline,
  .page-about .about-team,
  .page-about .about-coverage,
  .page-about .about-partners,
  .page-about .about-compliance {
    padding-top: 76px;
    padding-bottom: 76px;
  }

  .page-about .about-h2 {
    font-size: 30px;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: 4fr 7fr;
    gap: 48px;
    margin-bottom: 46px;
  }

  .page-about .about-timeline__figure img {
    max-width: 100%;
  }

  .page-about .timeline__item {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 0 40px;
    padding-left: 32px;
    padding-bottom: 40px;
  }

  .page-about .timeline__item:nth-child(even) .timeline__body p,
  .page-about .timeline__item:nth-child(even) .timeline__body .aside-note {
    max-width: 30em;
  }

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

  .page-about .coverage-card {
    padding: 26px 24px 24px;
  }

  .page-about .about-coverage__figure {
    margin-top: 46px;
  }

  .page-about .coverage-card__num {
    font-size: 38px;
  }

  .page-about .partner-card {
    padding: 26px 24px 28px;
  }

  .page-about .compliance-box {
    grid-template-columns: 7fr 3fr;
    gap: 44px;
    padding: 36px 34px;
  }

  .page-about .about-team__figure img {
    aspect-ratio: 25 / 16;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .team-band__seg,
  .page-about .partner-card,
  .page-about .coverage-card,
  .page-about .timeline__item::before {
    transition: none;
  }

  .page-about .team-band__seg:hover,
  .page-about .partner-card:hover,
  .page-about .coverage-card:hover {
    transform: none;
  }
}
</main>