.page-about {
  --about-dot: var(--indigo);
  background: var(--paper);
  color: var(--graphite);
  overflow-x: hidden;
}

.page-about .container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 16px 0 4px;
  font-size: 13px;
  color: var(--graphite);
}

.page-about .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--line-mid);
}

.page-about .breadcrumb__item a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mid);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .breadcrumb__item a:hover,
.page-about .breadcrumb__item a:focus-visible {
  color: var(--deep);
  border-bottom-color: var(--ice);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 30px 0 40px;
  background: linear-gradient(168deg, var(--pale) 0%, var(--paper) 58%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -140px;
  width: 440px;
  height: 340px;
  background: linear-gradient(118deg, rgba(46, 143, 181, 0.24), rgba(59, 58, 107, 0.08));
  transform: rotate(-8deg);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22% 100%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.page-about .about-hero__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ice);
  font-weight: 600;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(28px, 6.4vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--deep);
}

.page-about .about-hero__hl {
  display: inline-block;
  padding-bottom: 2px;
  color: var(--ice);
  box-shadow: inset 0 -0.28em 0 rgba(46, 143, 181, 0.18);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 40ch;
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-fact {
  background: var(--paper);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-fact__num {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--deep);
  line-height: 1;
}

.page-about .about-fact__lab {
  font-size: 12px;
  color: var(--graphite);
  letter-spacing: 0.02em;
}

.page-about .about-hero__acts {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

/* ---------- 章节通用 ---------- */
.page-about .section {
  padding: 44px 0;
}

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

.page-about .about-block::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 60px;
  bottom: 60px;
  width: 2px;
  background: linear-gradient(180deg, var(--line-mid), var(--line) 70%, transparent);
  pointer-events: none;
}

.page-about .band {
  margin: 0 0 20px;
}

.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  margin-bottom: 26px;
}

.page-about .about-head__num {
  grid-row: 1 / span 2;
  font-size: clamp(30px, 7vw, 46px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ice);
  opacity: 0.9;
}

.page-about .about-head__title {
  margin: 0;
  font-size: clamp(21px, 4.2vw, 30px);
  line-height: 1.32;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--deep);
}

.page-about .about-head__note {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.72;
}

/* ---------- 01 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .team-card {
  position: relative;
  padding: 22px 18px 18px;
  border: 1px solid var(--line);
  background: linear-gradient(to bottom left, var(--pale) 16px, var(--paper) 16px);
  min-width: 0;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

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

.page-about .team-card__idx {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ice);
  padding-bottom: 6px;
  border-bottom: 2px solid var(--ice);
}

.page-about .team-card__name {
  margin: 12px 0 8px;
  font-size: 18px;
  font-weight: 800;
  color: var(--deep);
  letter-spacing: -0.01em;
}

.page-about .team-card__desc {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.74;
}

/* ---------- 02 流程 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .flow__step {
  position: relative;
  padding: 18px 16px 16px;
  background: var(--pale);
  border-top: 3px solid var(--ice);
  min-width: 0;
}

.page-about .flow__idx {
  display: block;
  font-size: 30px;
  font-weight: 900;
  line-height: 1;
  color: var(--deep);
  letter-spacing: -0.02em;
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .flow__step:hover .flow__idx {
  transform: scale(1.12);
  color: var(--signal);
}

.page-about .flow__name {
  margin: 8px 0 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--deep);
}

.page-about .flow__desc {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.7;
}

.page-about .flow__owner {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--deep);
  background: var(--paper);
  border: 1px solid var(--line-mid);
  padding: 3px 8px;
}

.page-about .flow-bottom {
  margin-top: 28px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.page-about .flow-bottom__media {
  margin: 0;
}

.page-about .flow-bottom__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .flow-bottom__text {
  padding: 22px 18px;
  min-width: 0;
}

.page-about .flow-bottom__text p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.76;
}

.page-about .flow-bottom__text p:last-of-type {
  margin-bottom: 16px;
}

.page-about .panel__head {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 800;
  color: var(--deep);
}

/* ---------- 03 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  padding-left: 22px;
  margin-top: 6px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--indigo), var(--teal) 55%, var(--wine));
}

.page-about .tl-node {
  position: relative;
  border-bottom: 1px solid var(--line);
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 22px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--indigo);
  box-shadow: 0 0 0 3px var(--paper);
}

.page-about .tl-node:last-of-type {
  border-bottom: none;
}

.page-about .tl-node__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

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

.page-about .tl-node__year {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--indigo);
  font-weight: 600;
  min-width: 68px;
}

.page-about .tl-node__name {
  font-size: 17px;
  font-weight: 800;
  color: var(--deep);
  letter-spacing: -0.01em;
}

.page-about .tl-node__mark {
  margin-left: auto;
  width: 14px;
  height: 14px;
  position: relative;
  flex: none;
}

.page-about .tl-node__mark::before,
.page-about .tl-node__mark::after {
  content: "";
  position: absolute;
  background: var(--ice);
  transition: transform var(--dur) var(--ease);
}

.page-about .tl-node__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-about .tl-node__mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-about .tl-node[open] .tl-node__mark::after {
  transform: scaleY(0);
}

.page-about .tl-node__body {
  padding: 0 0 20px;
}

.page-about .tl-node__body p {
  margin: 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.78;
}

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

.page-about .history-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 04 覆盖范围 ---------- */
.page-about .coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .coverage__layer {
  position: relative;
  padding: 22px 18px;
  min-width: 0;
  border-left: 6px solid var(--ice);
  background: var(--pale);
}

.page-about .coverage__layer--b {
  border-left-color: var(--teal);
  background: linear-gradient(90deg, rgba(15, 90, 85, 0.1), var(--pale));
}

.page-about .coverage__layer--c {
  border-left-color: var(--indigo);
  background: linear-gradient(90deg, rgba(59, 58, 107, 0.1), var(--pale));
}

.page-about .coverage__num {
  display: block;
  font-size: 34px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--deep);
}

.page-about .coverage__unit {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ice);
  letter-spacing: 0.04em;
}

.page-about .coverage__layer--b .coverage__unit {
  color: var(--teal);
}

.page-about .coverage__layer--c .coverage__unit {
  color: var(--indigo);
}

.page-about .coverage__layer p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
}

.page-about .coverage-note {
  margin-top: 18px;
  padding: 20px 18px;
  min-width: 0;
}

.page-about .coverage-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .coverage-list li {
  font-size: 14.5px;
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
}

.page-about .coverage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--ice);
  transform: rotate(45deg);
}

.page-about .coverage-list strong {
  color: var(--deep);
  font-weight: 800;
}

/* ---------- 05 版本迭代 ---------- */
.page-about .iter-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .iter-stat {
  padding: 24px 20px;
}

.page-about .iter-stat__num {
  display: block;
  font-size: 52px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--signal);
}

.page-about .iter-stat__lab {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--pale);
  font-weight: 600;
}

.page-about .iter-stat p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.74;
  color: rgba(232, 242, 246, 0.78);
}

.page-about .iter-body {
  min-width: 0;
}

.page-about .iter-body p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
}

.page-about .iter-links {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 06 合作生态 ---------- */
.page-about .about-block--last {
  padding-bottom: 56px;
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .partner-card {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--wine);
  background: var(--paper);
  min-width: 0;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

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

.page-about .partner-card__num {
  display: block;
  font-size: 30px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--wine);
}

.page-about .partner-card__name {
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 800;
  color: var(--deep);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
}

.page-about .partner-cta {
  margin-top: 22px;
  padding: 22px 18px;
  background: var(--ink);
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-about .partner-cta__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--pale);
  max-width: 46ch;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero {
    padding: 40px 0 54px;
  }

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

  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

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

  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
  }

  .page-about .section {
    padding: 60px 0;
  }

  .page-about .about-block::before {
    left: 22px;
  }

  .page-about .about-head {
    gap: 8px 22px;
    margin-bottom: 34px;
  }

  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .flow__step {
    border-top: 3px solid var(--line-mid);
    border-right: 1px solid var(--line);
    padding: 20px 16px 18px;
    background: transparent;
    transition: border-top-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
  }

  .page-about .flow__step:last-child {
    border-right: none;
  }

  .page-about .flow__step:hover {
    border-top-color: var(--signal);
    background: var(--pale);
  }

  .page-about .flow-bottom {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .iter-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .coverage-note {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 24px;
    align-items: start;
    padding: 24px 22px;
  }

  .page-about .coverage-note .panel__head {
    grid-column: 1 / -1;
    margin-bottom: 0;
  }
}

@media (min-width: 1120px) {
  .page-about .about-hero__grid {
    gap: 56px;
  }

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

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

  .page-about .tl-node::before {
    left: -35px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .partner-card,
  .page-about .flow__idx,
  .page-about .flow__step,
  .page-about .tl-node__mark::before,
  .page-about .tl-node__mark::after {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .partner-card:hover {
    transform: none;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>