/* ===== 我们是谁 · 页面专属样式 ===== */
.page-about {
  --about-measure: 720px;
  --about-paper-ink: #0B1533;
  position: relative;
  isolation: isolate;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  padding-bottom: 72px;
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 4px 4px;
}

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

.page-about [id] {
  scroll-margin-top: 32px;
}

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

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: 26px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-about .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-state) var(--ease), border-color var(--dur-state) var(--ease);
}

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

/* ---------- 页首 ---------- */
.page-about .about-head {
  padding: 40px 0 36px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-head__kicker {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--amber);
}

.page-about .about-head__title {
  margin: 0 0 22px;
  max-width: 15em;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 7.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-about .about-head__lede {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 17px;
  line-height: 1.78;
  color: rgba(242, 245, 247, 0.82);
}

.page-about .about-head__anchor {
  display: flex;
  align-items: center;
  margin: 28px 0 0;
  font-family: var(--font-head);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--grey);
}

.page-about .about-head__dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--orange);
  animation: about-pulse 2.4s var(--ease) infinite;
}

@keyframes about-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.28; }
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  padding: 22px 0 8px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-index ol {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
  text-decoration: none;
  transition: color var(--dur-state) var(--ease), padding-left var(--dur-state) var(--ease);
}

.page-about .about-index li:last-child a {
  border-bottom: 0;
}

.page-about .about-index a:hover {
  color: var(--cyan);
  padding-left: 8px;
}

.page-about .about-index__num {
  min-width: 24px;
  font-family: var(--font-edit);
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 0.08em;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: 60px 0 0;
}

.page-about .about-section__mark {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 24px;
}

.page-about .about-section__num {
  font-family: var(--font-edit);
  font-size: 36px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-section__mark::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-strong);
}

.page-about .about-section__title {
  margin: 0 0 20px;
  max-width: 22em;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(23px, 5.4vw, 33px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-text {
  margin: 0 0 20px;
  max-width: var(--about-measure);
  font-size: 17px;
  line-height: 1.78;
  color: rgba(242, 245, 247, 0.84);
}

.page-about .about-text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 229, 208, 0.42);
  transition: border-color var(--dur-state) var(--ease);
}

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

/* ---------- 大数字呼吸点 ---------- */
.page-about .about-stat {
  margin: 44px 0 0;
  padding: 0;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-num);
  font-weight: 900;
  font-size: clamp(68px, 17vw, 138px);
  line-height: 0.86;
  letter-spacing: -0.04em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__cap {
  margin: 18px 0 0;
  max-width: 30em;
  padding-left: 16px;
  border-left: 2px solid var(--amber);
  font-family: var(--font-head);
  font-size: 15px;
  line-height: 1.6;
  color: var(--grey);
}

/* ---------- 团队配图 ---------- */
.page-about .about-team__figure {
  margin: 32px 0 8px;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  filter: saturate(0.86) contrast(1.06);
}

.page-about .about-team__figure .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 团队分工统计条 ---------- */
.page-about .about-teamstrip {
  display: grid;
  grid-template-columns: 1fr;
  margin: 36px 0 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-teamstrip__cell {
  padding: 24px 0 22px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-teamstrip__num {
  display: block;
  font-family: var(--font-num);
  font-weight: 900;
  font-size: clamp(54px, 13vw, 86px);
  line-height: 0.86;
  letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
  color: var(--white);
}

.page-about .about-teamstrip__cell:nth-child(1) .about-teamstrip__num { color: var(--cyan); }
.page-about .about-teamstrip__cell:nth-child(2) .about-teamstrip__num { color: var(--white); }
.page-about .about-teamstrip__cell:nth-child(3) .about-teamstrip__num { color: var(--amber); }

.page-about .about-teamstrip__label {
  display: block;
  margin: 16px 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-teamstrip__desc {
  display: block;
  max-width: 28em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 数据来源纸张块 ---------- */
.page-about .about-paper {
  position: relative;
  margin: 36px 0 0;
  padding: 30px 22px 28px;
  background: var(--paper);
  color: var(--about-paper-ink);
  box-shadow: 10px 10px 0 0 rgba(35, 229, 208, 0.12),
              10px 10px 0 1px rgba(168, 179, 196, 0.3);
}

.page-about .about-paper__label {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--orange);
}

.page-about .about-paper__title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.45;
  color: var(--about-paper-ink);
}

.page-about .about-paper p {
  margin: 0 0 14px;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.78;
  color: #172244;
}

.page-about .about-paper p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 24px 0 0;
}

.page-about .about-facts > div {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  padding: 11px 0;
  border-top: 1px solid rgba(11, 21, 51, 0.16);
}

.page-about .about-facts dt {
  font-family: var(--font-head);
  font-size: 13px;
  color: #4d5a78;
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  color: var(--about-paper-ink);
}

/* ---------- 折叠问答 ---------- */
.page-about .about-faq {
  margin: 44px 0 0;
  max-width: 800px;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-faq .accordion__item {
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-faq .accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 18px 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-head);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
  transition: color var(--dur-state) var(--ease);
}

.page-about .about-faq .accordion__trigger:hover {
  color: var(--cyan);
}

.page-about .about-faq .accordion__sign {
  flex: none;
  min-width: 18px;
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 400;
  line-height: 1;
  text-align: center;
  color: var(--cyan);
}

.page-about .about-faq .accordion__panel {
  padding: 0 0 22px;
}

.page-about .about-faq .accordion__panel p {
  margin: 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(242, 245, 247, 0.78);
}

.page-about .about-faq .accordion__panel a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 229, 208, 0.42);
}

/* ---------- 四个内容库 ---------- */
.page-about .about-libs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-libs__item {
  position: relative;
  padding: 24px 0 26px;
  border-top: 1px solid var(--line);
}

.page-about .about-libs__item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 44px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-libs__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-edit);
  font-size: 12.5px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .about-libs__name {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.4;
  color: var(--white);
}

.page-about .about-libs__desc {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(242, 245, 247, 0.72);
}

.page-about .about-libs__desc a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 229, 208, 0.42);
}

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

/* ---------- 覆盖与合作 ---------- */
.page-about .about-cover {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin: 30px 0 0;
}

.page-about .about-cover__body .about-text:last-of-type {
  margin-bottom: 0;
}

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

.page-about .about-cover__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  filter: saturate(0.8) contrast(1.08);
}

.page-about .about-cover__figure .figure__caption {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--amber);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tags li {
  padding: 7px 13px;
  border: 1px solid var(--line-strong);
  background: rgba(20, 34, 74, 0.55);
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: rgba(242, 245, 247, 0.88);
}

.page-about .about-tags li:nth-child(3n) {
  border-color: rgba(35, 229, 208, 0.5);
  color: var(--mist);
}

.page-about .about-tags li:nth-child(4n) {
  border-color: rgba(255, 176, 32, 0.5);
  color: #ffd489;
}

/* ---------- 发展历程 ---------- */
.page-about .about-archive__figure {
  margin: 30px 0 40px;
}

.page-about .about-archive__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  filter: sepia(0.12) saturate(0.9) contrast(1.05);
}

.page-about .about-archive__figure .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding-left: 28px;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 26px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 9px;
  left: -33px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 176, 32, 0.12);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item:last-child::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 90, 46, 0.16);
}

.page-about .about-timeline__stage {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}

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

.page-about .about-timeline__trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--white);
  transition: color var(--dur-state) var(--ease);
}

.page-about .about-timeline__trigger:hover {
  color: var(--cyan);
}

.page-about .about-timeline__trigger .accordion__sign {
  flex: none;
  min-width: 16px;
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 400;
  line-height: 1.35;
  text-align: center;
  color: var(--cyan);
}

.page-about .about-timeline__panel {
  padding: 14px 0 0;
}

.page-about .about-timeline__panel p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(242, 245, 247, 0.76);
}

.page-about .about-timeline__panel a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 229, 208, 0.42);
}

/* ---------- 收尾入口 ---------- */
.page-about .about-next {
  margin-top: 64px;
  padding: 32px 0 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-next__text {
  margin: 0 0 22px;
  max-width: 32em;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.62;
  color: var(--white);
}

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

/* ---------- 中等屏 ---------- */
@media (min-width: 640px) {
  .page-about .about-index ol {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 32px;
  }

  .page-about .about-index li:nth-last-child(2) a {
    border-bottom: 0;
  }

  .page-about .about-section {
    padding-top: 72px;
  }

  .page-about .about-paper {
    padding: 40px 36px 36px;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 32px;
  }

  .page-about .about-libs {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 40px;
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 900px) {
  .page-about {
    padding-bottom: 96px;
  }

  .page-about .about-head {
    padding: 56px 0 46px;
  }

  .page-about .about-index {
    padding: 26px 0 10px;
  }

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

  .page-about .about-teamstrip__cell {
    padding: 30px 30px 28px 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-about .about-teamstrip__cell + .about-teamstrip__cell {
    padding-left: 30px;
  }

  .page-about .about-teamstrip__cell:last-child {
    padding-right: 0;
    border-right: 0;
  }

  .page-about .about-cover {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-section__num {
    font-size: 44px;
  }
}
<<<END>>>