.page-about {
  --about-rail: 262px;
  --about-gap: clamp(24px, 4vw, 54px);
  --about-block: clamp(40px, 6vw, 78px);
  display: block;
}

.page-about .section {
  padding-block: var(--about-block);
}

.page-about .breadcrumbs {
  padding-top: clamp(16px, 2.6vw, 26px);
}

.page-about .breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--grey);
}

.page-about .breadcrumbs ol li + li::before {
  content: "／";
  margin-right: 8px;
  color: var(--line-strong);
}

.page-about .breadcrumbs a {
  color: var(--grey);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

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

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(20px, 3vw, 34px) clamp(36px, 5vw, 62px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% 42% 30% -18%;
  background:
    radial-gradient(58% 58% at 26% 30%, rgba(91, 58, 142, .16), transparent 72%),
    radial-gradient(46% 46% at 92% 6%, rgba(255, 107, 44, .13), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-hero__text .eyebrow {
  margin-bottom: 12px;
}

.page-about .about-hero__text h1 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.08;
  font-size: clamp(30px, 7.2vw, 58px);
  color: var(--ink);
}

.page-about .about-hero__text .lede {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: rgba(30, 23, 16, .78);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__figure {
  position: relative;
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: auto -6% -8% 18%;
  height: 46%;
  background: linear-gradient(100deg, rgba(255, 107, 44, .30), rgba(91, 58, 142, .22));
  filter: blur(34px);
  z-index: -1;
  pointer-events: none;
}

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

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4.4vw, 48px) 0 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.page-about .about-figure {
  background: var(--white);
  padding: clamp(16px, 2.4vw, 24px);
}

.page-about .about-figure dt {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--grey);
  margin-bottom: 8px;
}

.page-about .about-figure dd {
  margin: 0;
  font-size: clamp(16px, 1.8vw, 18px);
  color: var(--ink);
  font-weight: 600;
}

.page-about .about-num {
  font-size: clamp(22px, 3.2vw, 30px);
  color: var(--purple);
  margin-right: 2px;
}

/* ============ 分栏叙事 ============ */
.page-about .about-split {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-split__aside .eyebrow {
  margin: 0 0 10px;
}

.page-about .about-split__aside .section-title {
  margin: 0;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.16;
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-about .about-split__body {
  border-left: 0;
  padding-left: 0;
}

/* ============ 时间轴 ============ */
.page-about .about-timeline .section__head {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-timeline__inner {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}

.page-about .timeline-panel {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--mist), rgba(255, 255, 255, .7));
  overflow: hidden;
}

.page-about .timeline-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--purple), var(--orange));
}

.page-about .timeline-panel__kicker {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--purple);
}

.page-about .timeline-panel__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(30, 23, 16, .82);
}

.page-about .timeline-panel__hint {
  margin: 16px 0 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--grey);
}

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

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--purple), var(--orange));
  opacity: .35;
}

.page-about .tl-item {
  position: relative;
  padding-left: 42px;
  margin-bottom: 12px;
}

.page-about .tl-item:last-child {
  margin-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 20px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--purple);
  z-index: 1;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .tl-item:has(.tl-details[open])::before {
  border-color: var(--orange);
  background: var(--orange);
}

.page-about .tl-details {
  border: 0;
}

.page-about .tl-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 15px 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}

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

.page-about .tl-summary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
  border-color: var(--line-strong);
}

.page-about .tl-summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-about .tl-details[open] > .tl-summary {
  border-color: var(--purple);
  box-shadow: var(--shadow-2);
}

.page-about .tl-summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 15px;
  line-height: 1;
  color: var(--orange);
}

.page-about .tl-details[open] > .tl-summary::after {
  content: "－";
}

.page-about .tl-when {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--purple);
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--mist);
}

.page-about .tl-title {
  font-size: clamp(15px, 1.8vw, 17px);
  font-weight: 600;
  color: var(--ink);
}

.page-about .tl-body {
  padding: 14px 18px 4px;
  border-left: 2px solid var(--mist);
  margin-left: 2px;
}

.page-about .tl-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(30, 23, 16, .78);
}

/* ============ 内容体系 ============ */
.page-about .about-pillars-section {
  background:
    linear-gradient(180deg, rgba(232, 225, 245, .68), rgba(247, 242, 232, 0) 78%);
}

.page-about .about-pillars-section .section__head {
  margin-bottom: clamp(24px, 3.6vw, 42px);
}

.page-about .about-pillars-section .section__head .lede {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(30, 23, 16, .74);
}

.page-about .about-pillars {
  display: grid;
  gap: 18px;
}

.page-about .pillar {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .pillar::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--purple);
}

.page-about .pillar--orange::before {
  background: var(--orange);
}

.page-about .pillar--green::before {
  background: var(--green);
}

.page-about .pillar:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}

.page-about .pillar__index {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--grey);
}

.page-about .pillar__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}

.page-about .pillar p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(30, 23, 16, .78);
}

.page-about .pillar__meta {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--purple);
}

/* ============ 历史交锋档案 ============ */
.page-about .about-archive__inner {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

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

.page-about .about-archive__body .eyebrow {
  margin: 0 0 10px;
}

.page-about .about-archive__body .section-title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: clamp(24px, 4.4vw, 40px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-about .archive-table-wrap {
  margin-top: 22px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.page-about .archive-table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-about .archive-table caption {
  text-align: left;
}

.page-about .archive-table thead th {
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--grey);
  font-weight: 500;
  text-align: left;
  padding: 13px 16px;
  background: var(--mist);
  white-space: nowrap;
}

.page-about .archive-table tbody th,
.page-about .archive-table tbody td {
  padding: 13px 16px;
  border-top: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.6;
}

.page-about .archive-table tbody th {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.page-about .archive-table tbody td {
  color: rgba(30, 23, 16, .76);
}

.page-about .archive-table tbody tr:nth-child(even) td,
.page-about .archive-table tbody tr:nth-child(even) th {
  background: rgba(247, 242, 232, .55);
}

.page-about .archive-note {
  margin: 12px 0 0;
  font-size: 12.5px;
  color: var(--grey);
}

/* ============ 团队 ============ */
.page-about .about-team .section__head {
  margin-bottom: clamp(24px, 3.6vw, 42px);
}

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

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

.page-about .about-team__body .prose p {
  margin-top: 0;
}

.page-about .about-team__roles {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .role-card {
  padding: clamp(16px, 2.4vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .role-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}

.page-about .role-card__num {
  margin: 0 0 8px;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1;
  color: var(--orange);
}

.page-about .role-card__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .role-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(30, 23, 16, .74);
}

/* ============ 合作与荣誉 ============ */
.page-about .about-eco {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--night);
  color: var(--cream);
  padding: clamp(26px, 4.6vw, 54px);
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-eco::before {
  content: "";
  position: absolute;
  top: -38%;
  right: -14%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(255, 107, 44, .30), transparent 70%);
  pointer-events: none;
}

.page-about .about-eco::after {
  content: "";
  position: absolute;
  bottom: -46%;
  left: -14%;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(91, 58, 142, .55), transparent 70%);
  pointer-events: none;
}

.page-about .about-eco__col {
  position: relative;
  z-index: 1;
}

.page-about .about-eco .eyebrow--night {
  color: rgba(255, 107, 44, .92);
  margin: 0 0 12px;
}

.page-about .about-eco .section-title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(24px, 4.2vw, 38px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -.015em;
  color: var(--cream);
}

.page-about .about-eco__col > p {
  margin: 0 0 24px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 242, 232, .78);
}

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

.page-about .eco-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, .04);
  backdrop-filter: blur(6px);
}

.page-about .eco-year {
  margin: 0;
  flex: 0 0 auto;
  min-width: 58px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-about .eco-name {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: rgba(247, 242, 232, .9);
}

/* ============ 下一步 ============ */
.page-about .about-next__inner {
  display: grid;
  gap: clamp(20px, 3.4vw, 40px);
  align-items: center;
  padding: clamp(24px, 3.6vw, 40px) 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-next__text .eyebrow {
  margin: 0 0 10px;
}

.page-about .about-next__text h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.6vw, 34px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
}

.page-about .about-next__text p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(30, 23, 16, .76);
}

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

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .role-card--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1.08fr);
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 960px) {
  .page-about .about-split {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
  }

  .page-about .about-split__aside {
    position: sticky;
    top: 100px;
  }

  .page-about .about-split__body {
    padding-left: clamp(20px, 3vw, 38px);
    border-left: 1px solid var(--line);
  }

  .page-about .about-timeline__inner {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  }

  .page-about .timeline-panel {
    position: sticky;
    top: 104px;
  }

  .page-about .about-archive__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  }

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

  .page-about .about-eco {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-summary,
  .page-about .pillar,
  .page-about .role-card {
    transition: opacity .2s linear;
  }

  .page-about .tl-summary:hover,
  .page-about .pillar:hover,
  .page-about .role-card:hover {
    transform: none;
  }
}