.page-about {
  --about-hair: rgba(199, 194, 184, .65);
  --about-cat-color: var(--pg-gold);
}

/* ---------- 面包屑 ---------- */
.page-about .pg-breadcrumb {
  padding: 18px 0 0;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding: 16px 0 0;
}

.page-about .about-hero__frame {
  position: relative;
  padding: 34px 20px 28px;
  background:
    linear-gradient(180deg, rgba(242, 216, 154, .30) 0%, rgba(248, 244, 236, 0) 58%),
    var(--pg-cream);
  border: 2px solid var(--pg-ink);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--pg-font-head);
  font-size: clamp(34px, 8.4vw, 84px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--pg-ink);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 44ch;
  font-family: var(--pg-font-body);
  font-size: 17px;
  line-height: 1.78;
  color: var(--pg-text);
}

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

/* ---------- 横幅图 ---------- */
.page-about .about-banner {
  margin: 30px 0 0;
  padding: 0;
}

.page-about .about-banner__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 560;
  object-fit: cover;
  max-height: 58vh;
}

.page-about .about-banner__caption {
  margin-top: 10px;
  padding: 0 20px;
  font-family: var(--pg-font-anno);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--pg-mute);
}

@media (min-width: 760px) {
  .page-about .about-banner__caption {
    padding: 0;
    max-width: var(--pg-shell);
    margin-left: auto;
    margin-right: auto;
  }
}

/* ---------- 通用标题缩放 ---------- */
.page-about .pg-title--lg {
  font-size: clamp(30px, 6.8vw, 56px);
  line-height: 1.12;
  letter-spacing: -.02em;
}

.page-about .pg-title--md {
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.18;
  letter-spacing: -.015em;
}

.page-about .pg-lede {
  max-width: 44ch;
  font-family: var(--pg-font-body);
  line-height: 1.78;
  color: var(--pg-text);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__lead {
  margin: 16px 0 0;
}

.page-about .tl-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-about .tl-filters {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .tl-filter {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--pg-line);
  border-radius: 999px;
  background: #fff;
  font-family: var(--pg-font-anno);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--pg-text);
  cursor: pointer;
  transition: background .2s var(--pg-ease), border-color .2s var(--pg-ease), color .2s var(--pg-ease);
}

.page-about .tl-filter:hover {
  border-color: var(--pg-gold-deep);
}

.page-about #tl-all:checked ~ .tl-filters label[for="tl-all"],
.page-about #tl-system:checked ~ .tl-filters label[for="tl-system"],
.page-about #tl-team:checked ~ .tl-filters label[for="tl-team"] {
  background: var(--pg-gold);
  border-color: var(--pg-gold-deep);
  color: var(--pg-ink);
}

.page-about #tl-system:checked ~ .tl-list .tl-item:not([data-cat="system"]),
.page-about #tl-team:checked ~ .tl-list .tl-item:not([data-cat="team"]) {
  display: none;
}

.page-about .tl-list {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 11px;
  width: 2px;
  background: linear-gradient(180deg, var(--pg-gold) 0%, var(--pg-gold-deep) 55%, rgba(184, 128, 31, .25) 100%);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 30px 40px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--pg-gold);
  border: 2px solid var(--pg-cream);
  box-shadow: 0 0 0 2px var(--pg-gold-deep);
  transition: transform .2s var(--pg-ease);
}

.page-about .tl-item:hover::before {
  transform: scale(1.18);
}

.page-about .tl-tag {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--pg-red);
  border-radius: 999px;
  font-family: var(--pg-font-anno);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--pg-red);
}

.page-about .tl-title {
  margin: 12px 0 0;
  font-family: var(--pg-font-head);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--pg-ink);
}

.page-about .tl-sum {
  margin: 8px 0 0;
  font-family: var(--pg-font-body);
  font-size: 16px;
  line-height: 1.72;
  color: var(--pg-text);
}

.page-about .tl-detail {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .42s var(--pg-ease), opacity .3s var(--pg-ease), margin-top .3s var(--pg-ease);
}

.page-about .tl-detail p {
  margin: 0;
  padding: 12px 14px;
  background: rgba(242, 216, 154, .34);
  border-left: 3px solid var(--pg-gold);
  font-family: var(--pg-font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--pg-text);
}

.page-about .tl-item:hover .tl-detail,
.page-about .tl-item:focus-within .tl-detail {
  max-height: 340px;
  opacity: 1;
  margin-top: 12px;
}

@media (hover: none) {
  .page-about .tl-detail {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
  }
}

@media (min-width: 900px) {
  .page-about .tl-list::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .tl-item {
    width: 50%;
    padding-left: 0;
    padding-right: 48px;
  }

  .page-about .tl-item::before {
    left: auto;
    right: -7px;
  }

  .page-about .tl-item--r {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 48px;
  }

  .page-about .tl-item--r::before {
    left: -7px;
    right: auto;
  }
}

/* ---------- 横向数据带 ---------- */
.page-about .about-band {
  position: relative;
  margin-top: 48px;
  padding: 42px 0 46px;
  background: var(--pg-indigo);
  color: var(--pg-cream);
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--pg-gold) 0%, var(--pg-red) 52%, var(--pg-gold-deep) 100%);
}

.page-about .about-band__title {
  margin: 0;
  font-family: var(--pg-font-head);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--pg-cream);
}

.page-about .about-band__grid {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 14px;
}

@media (min-width: 860px) {
  .page-about .about-band__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .about-stat {
  padding-left: 13px;
  border-left: 2px solid rgba(224, 168, 60, .55);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--pg-font-num);
  font-size: clamp(34px, 8vw, 56px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--pg-gold);
}

.page-about .about-stat__unit {
  margin-left: 2px;
  font-size: .46em;
  color: var(--pg-butter);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 10px;
  font-family: var(--pg-font-anno);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(248, 244, 236, .72);
}

.page-about .about-trend {
  margin: 32px 0 0;
  padding: 16px 14px 8px;
  border: 1px solid rgba(248, 244, 236, .18);
  background: rgba(255, 255, 255, .05);
}

.page-about .about-trend__cap {
  font-family: var(--pg-font-anno);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(248, 244, 236, .7);
}

.page-about .about-trend__svg {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 10px;
}

/* ---------- 内容体系 ---------- */
.page-about .about-system__lead {
  margin: 16px 0 0;
}

.page-about .about-cats {
  margin-top: 30px;
  display: grid;
  gap: 16px;
}

@media (min-width: 720px) {
  .page-about .about-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

.page-about .about-cat {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 26px 18px 20px;
  background: #fff;
  border: 1px solid var(--about-hair);
  box-shadow: var(--pg-shadow-soft);
  transition: transform .25s var(--pg-ease), box-shadow .25s var(--pg-ease);
}

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

.page-about .about-cat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--about-cat-color);
}

.page-about .about-cat--read { --about-cat-color: var(--pg-red); }
.page-about .about-cat--tool { --about-cat-color: var(--pg-gold); }
.page-about .about-cat--guide { --about-cat-color: var(--pg-indigo); }
.page-about .about-cat--topic { --about-cat-color: var(--pg-green); }

.page-about .about-cat__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.page-about .about-cat__name {
  margin: 0;
  font-family: var(--pg-font-head);
  font-size: 25px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--pg-ink);
}

.page-about .about-cat__count {
  font-family: var(--pg-font-num);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--pg-mute);
  white-space: nowrap;
}

.page-about .about-cat__desc {
  flex: 1;
  margin: 12px 0 16px;
  font-family: var(--pg-font-body);
  font-size: 15px;
  line-height: 1.74;
  color: var(--pg-text);
}

.page-about .about-cat__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-system__more {
  margin: 26px 0 0;
}

.page-about .pg-more {
  font-family: var(--pg-font-anno);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--pg-gold-deep);
  text-decoration: none;
}

.page-about .pg-more:hover {
  color: var(--pg-red);
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  margin-top: 28px;
  display: grid;
  gap: 26px;
}

@media (min-width: 880px) {
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 44px;
    align-items: start;
  }
}

.page-about .about-team__copy .pg-text {
  max-width: 46ch;
  font-family: var(--pg-font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--pg-text);
}

.page-about .about-team__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-team__list li {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-team__list li:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-team__zone {
  font-family: var(--pg-font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--pg-indigo);
}

.page-about .about-team__duty {
  font-family: var(--pg-font-body);
  font-size: 15px;
  line-height: 1.72;
  color: var(--pg-text);
}

.page-about .about-quote {
  margin: 26px 0 0;
  padding: 18px 20px;
  max-width: 34em;
  background: var(--pg-butter);
  border-left: 4px solid var(--pg-red);
  font-family: var(--pg-font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--pg-ink);
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--about-hair);
}

.page-about .about-team__figure figcaption {
  margin-top: 10px;
  font-family: var(--pg-font-anno);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--pg-mute);
}

/* ---------- 合作与规范 ---------- */
.page-about .about-partner__panel {
  padding: 32px 20px 26px;
  background: linear-gradient(158deg, rgba(34, 64, 94, .07) 0%, rgba(242, 216, 154, .30) 62%, rgba(248, 244, 236, 0) 100%);
  border: 1px solid var(--about-hair);
}

@media (min-width: 880px) {
  .page-about .about-partner__panel {
    padding: 40px 40px 34px;
  }
}

.page-about .about-partner__grid {
  margin-top: 26px;
  display: grid;
  gap: 22px;
}

@media (min-width: 780px) {
  .page-about .about-partner__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }
}

.page-about .about-partner__sub {
  margin: 0 0 10px;
  font-family: var(--pg-font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--pg-indigo);
}

.page-about .about-partner__col .pg-text {
  max-width: 44ch;
  font-family: var(--pg-font-body);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--pg-text);
}

.page-about .about-partner__figure {
  margin: 28px 0 0;
}

.page-about .about-partner__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid rgba(199, 194, 184, .8);
}

.page-about .about-partner__figure figcaption {
  margin-top: 10px;
  font-family: var(--pg-font-anno);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--pg-mute);
}

/* ---------- 收尾入口 ---------- */
.page-about .about-next__inner {
  padding-top: 8px;
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--pg-font-head);
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--pg-ink);
}

.page-about .about-next__text {
  margin: 14px 0 0;
  max-width: 52ch;
  font-family: var(--pg-font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--pg-text);
}

.page-about .about-next__links {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
}

.page-about .pg-btn {
  display: inline-block;
  padding: 12px 24px;
  font-family: var(--pg-font-anno);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background .2s var(--pg-ease), color .2s var(--pg-ease), border-color .2s var(--pg-ease);
}

.page-about .pg-btn--gold {
  background: var(--pg-gold);
  border-color: var(--pg-gold-deep);
  color: var(--pg-ink);
}

.page-about .pg-btn--gold:hover {
  background: var(--pg-gold-deep);
  color: var(--pg-cream);
}

.page-about .pg-btn--outline {
  background: transparent;
  border-color: var(--pg-indigo);
  color: var(--pg-indigo);
}

.page-about .pg-btn--outline:hover {
  background: var(--pg-indigo);
  color: var(--pg-cream);
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .tl-detail,
  .page-about .about-cat,
  .page-about .tl-item::before,
  .page-about .pg-btn {
    transition: none;
  }

  .page-about .about-cat:hover,
  .page-about .tl-item:hover::before {
    transform: none;
  }

  .page-about .tl-detail {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
  }
}