.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

.page-about .breadcrumbs {
  padding-top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-about .section {
  padding-block: clamp(36px, 6vw, 72px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(22px, 4vw, 44px) clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-hero-main {
  min-width: 0;
}

.page-about .about-h1 {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(32px, 7vw, 66px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--blue-900);
}

.page-about .about-lede {
  max-width: 46em;
  margin: 0;
  font-size: clamp(15.5px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--ink);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-hero-aside {
  background: var(--mist);
  border-left: 4px solid var(--orange-500);
  padding: 18px 18px 16px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--blue-900);
}

.page-about .about-hero-aside p {
  margin: 0 0 10px;
}

.page-about .about-hero-aside p:last-child {
  margin-bottom: 0;
}

.page-about .as-label {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange-500);
}

.page-about .about-hero-aside-foot {
  padding-top: 10px;
  border-top: 1px solid rgba(11, 31, 51, 0.16);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-about .about-figures {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-top: 3px solid var(--blue-900);
}

.page-about .about-figures li {
  background: var(--paper);
  padding: 14px 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .fig-num {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--blue-900);
}

.page-about .fig-label {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--slate);
}

/* ---------- 章节标题组 ---------- */
.page-about .about-head {
  max-width: 760px;
  margin-bottom: clamp(22px, 3.5vw, 36px);
}

.page-about .section-num {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--orange-500);
}

.page-about .about-h2 {
  margin: 6px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(25px, 3.6vw, 42px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--blue-900);
}

.page-about .about-sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

/* ---------- A 起点 ---------- */
.page-about .about-origin {
  background: var(--paper);
}

.page-about .origin-rows {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .origin-row {
  display: grid;
  gap: 6px 18px;
  padding: 20px 0 20px 14px;
  border-bottom: 1px solid var(--line);
  border-left: 3px solid transparent;
  transition: border-left-color 0.18s ease, background-color 0.18s ease;
}

.page-about .origin-row:hover,
.page-about .origin-row:focus-within {
  border-left-color: var(--orange-500);
  background: rgba(220, 229, 230, 0.35);
}

.page-about .origin-idx {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange-500);
}

.page-about .origin-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.3;
  color: var(--blue-900);
}

.page-about .origin-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: #26313a;
}

.page-about .origin-link {
  font-size: 12.5px;
  color: var(--slate);
  text-decoration: none;
  justify-self: start;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}

.page-about .origin-link:hover,
.page-about .origin-link:focus-visible {
  color: var(--orange-500);
  border-bottom-color: var(--orange-500);
}

/* ---------- B 适配四维 ---------- */
.page-about .about-method {
  background: linear-gradient(180deg, rgba(220, 229, 230, 0.55), rgba(220, 229, 230, 0));
  border-top: 1px solid var(--line);
}

.page-about .method-grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .method-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-about .method-cell {
  background: var(--blue-900);
  color: var(--paper);
  padding: 16px 14px 18px;
  border-top: 3px solid var(--blue-700);
  transition: border-top-color 0.18s ease, transform 0.18s ease;
}

.page-about .method-cell:nth-child(1) {
  border-top-color: var(--orange-500);
}

.page-about .method-cell:hover {
  border-top-color: var(--orange-300);
}

.page-about .method-code {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange-300);
}

.page-about .method-name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .method-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(250, 246, 238, 0.86);
}

.page-about .method-figure {
  margin: 0;
}

.page-about .method-figure .figure-media {
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

/* ---------- 图片基础 ---------- */
.page-about .figure-media {
  overflow: hidden;
  background: var(--mist);
}

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

.page-about .figure-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- C 发展节点 ---------- */
.page-about .timeline-figure {
  margin: 0 0 clamp(22px, 4vw, 36px);
}

.page-about .timeline-layout {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .timeline-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .timeline-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: var(--line-strong);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 22px;
  outline-offset: 4px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 12px;
  height: 12px;
  background: var(--paper);
  border: 2px solid var(--blue-700);
}

.page-about .tl-item:first-child::before {
  border-color: var(--orange-500);
  background: var(--orange-300);
}

.page-about .tl-year {
  margin: 0 0 4px;
  font-size: 17px;
  letter-spacing: 0.12em;
  color: var(--blue-900);
}

.page-about .tl-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .tl-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--slate);
}

.page-about .tl-note {
  margin: 8px 0 0;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--teal);
  border-left: 2px solid var(--orange-300);
  padding-left: 8px;
}

.page-about .timeline-aside {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-top: 4px solid var(--blue-900);
  padding: 16px 16px 18px;
  box-shadow: 6px 6px 0 rgba(11, 31, 51, 0.06);
}

.page-about .aside-title {
  margin: 6px 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.4;
  color: var(--blue-900);
}

.page-about .timeline-aside p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--slate);
}

.page-about .aside-list {
  list-style: none;
  margin: 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 8px;
  font-size: 12.5px;
  color: var(--ink);
}

.page-about .aside-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---------- D 团队 ---------- */
.page-about .about-team {
  background: var(--blue-900);
  color: var(--paper);
}

.page-about .about-team .about-h2 {
  color: var(--paper);
}

.page-about .about-team .about-sub {
  color: rgba(250, 246, 238, 0.78);
}

.page-about .about-team .figure-caption {
  color: rgba(250, 246, 238, 0.6);
}

.page-about .about-team .figure-media {
  border: 1px solid var(--line-light);
  background: var(--blue-700);
}

.page-about .team-grid {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-about .team-figure {
  margin: 0;
}

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

.page-about .team-card {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 2px 14px;
  padding: 14px 16px 16px;
  background: var(--blue-700);
  border-left: 3px solid var(--orange-500);
}

.page-about .team-code {
  grid-row: 1 / span 2;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange-300);
  align-self: start;
  padding-top: 3px;
}

.page-about .team-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .team-text {
  margin: 4px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(250, 246, 238, 0.8);
}

/* ---------- E 合作 ---------- */
.page-about .filter-bar {
  margin-bottom: 18px;
}

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

.page-about .partner-item {
  padding-top: 12px;
  border-top: 2px solid var(--blue-900);
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .partner-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16.5px;
  line-height: 1.35;
  color: var(--blue-900);
}

.page-about .partner-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--slate);
}

.page-about .partner-item .tag {
  align-self: flex-start;
}

.page-about .about-proof {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-block: 1px solid var(--line-strong);
}

.page-about .about-proof li {
  background: var(--mist);
  padding: 13px 14px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--blue-900);
  display: flex;
  align-items: flex-start;
  gap: 9px;
}

.page-about .about-proof .status-dot {
  margin-top: 6px;
  flex: none;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(36px, 6vw, 66px);
  background: var(--blue-900);
  color: var(--paper);
  padding-block: clamp(28px, 5vw, 52px);
  border-top: 6px solid var(--orange-500);
}

.page-about .about-cta-grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-cta-kicker {
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--orange-300);
}

.page-about .about-cta-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-cta-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(250, 246, 238, 0.78);
}

.page-about .about-cta-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-light);
  align-self: start;
}

.page-about .about-cta-links li {
  background: var(--blue-700);
}

.page-about .about-cta-link {
  display: block;
  padding: 14px 16px;
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: border-left-color 0.18s ease, background-color 0.18s ease;
}

.page-about .about-cta-link:hover,
.page-about .about-cta-link:focus-visible {
  border-left-color: var(--orange-500);
  background: var(--blue-900);
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .partner-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }

  .page-about .about-hero-aside {
    margin-top: 34px;
  }

  .page-about .origin-row {
    grid-template-columns: 54px minmax(0, 210px) minmax(0, 1fr) 108px;
    align-items: start;
    padding: 24px 0 24px 18px;
  }

  .page-about .origin-link {
    justify-self: end;
    text-align: right;
  }

  .page-about .timeline-layout {
    grid-template-columns: minmax(0, 1fr) 264px;
    align-items: start;
  }

  .page-about .timeline-aside {
    position: sticky;
    top: 96px;
  }

  .page-about .about-cta-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .team-card {
    padding: 16px 20px 18px;
  }
}

@media (min-width: 960px) {
  .page-about .method-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .method-matrix {
    gap: 10px;
  }

  .page-about .method-cell {
    padding: 20px 18px 22px;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .partner-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) and (hover: hover) {
  .page-about .tl-note {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height 0.28s ease, opacity 0.2s ease, margin-top 0.2s ease;
  }

  .page-about .tl-item:hover .tl-note,
  .page-about .tl-item:focus-within .tl-note,
  .page-about .tl-item:focus .tl-note {
    max-height: 80px;
    opacity: 1;
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .origin-row,
  .page-about .method-cell,
  .page-about .about-cta-link,
  .page-about .tl-note {
    transition: none;
  }
}
<<<END>>>