.page-about {
  --about-line: var(--line);
  --about-tl-pad: 22px;
  --about-soft: color-mix(in srgb, var(--ink-2) 82%, var(--glass));
  color: var(--text);
}

.page-about .about-crumb {
  padding-top: calc(var(--header-h) + 20px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, var(--about-line) 1px, transparent 1px);
  background-size: 96px 100%;
  opacity: 0.35;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

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

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.3rem, 8.4vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 14em;
}

.page-about .about-hero__aside {
  border-top: 1px solid var(--about-line);
  padding-top: 22px;
}

.page-about .about-hero__lede {
  margin: 0 0 24px;
  color: var(--text-dim);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 34em;
}

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

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

.page-about .about-hero__index-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 200ms var(--ease), padding-left 200ms var(--ease);
}

.page-about .about-hero__index-link:hover,
.page-about .about-hero__index-link:focus-visible {
  color: var(--lime);
  padding-left: 6px;
}

.page-about .about-hero__index-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: repeat(12, 1fr);
    column-gap: 24px;
  }
  .page-about .about-hero__eyebrow {
    grid-column: 1 / -1;
  }
  .page-about .about-hero__title {
    grid-column: 1 / span 8;
    padding-right: 40px;
  }
  .page-about .about-hero__aside {
    grid-column: 9 / -1;
    align-self: end;
    margin-top: -12px;
  }
}

/* ---------- 共有排版 ---------- */

.page-about .about-belief__head,
.page-about .about-team__head,
.page-about .about-timeline__head,
.page-about .about-assets__head {
  max-width: 46rem;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .section__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .serif-accent {
  font-family: var(--font-serif);
  font-weight: 500;
  color: var(--silver);
  margin: 18px 0 0;
  font-size: 1.02rem;
  line-height: 1.7;
  border-left: 2px solid var(--lime);
  padding-left: 16px;
}

/* ---------- 主张三条线 ---------- */

.page-about .path-lines {
  border-top: 1px solid var(--about-line);
}

.page-about .path-line {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 6px 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--about-line);
  transition: background-color 220ms var(--ease);
}

.page-about .path-line:hover {
  background-color: var(--ink-2);
}

.page-about .path-line__num {
  grid-row: span 2;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--lime);
  padding-top: 4px;
}

.page-about .path-line__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.16rem;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .path-line__text {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.78;
  max-width: 52em;
}

@media (min-width: 820px) {
  .page-about .path-line {
    grid-template-columns: 64px 210px 1fr;
    align-items: start;
    gap: 0 24px;
  }
  .page-about .path-line__num {
    grid-row: auto;
  }
  .page-about .path-line__name {
    padding-top: 2px;
  }
}

.page-about .about-belief__note {
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  gap: 18px;
  max-width: 52rem;
}

.page-about .about-belief__note p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.8;
}

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

/* ---------- 内容方法 ---------- */

.page-about .about-method__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-method__title {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-method__text p {
  margin: 0 0 16px;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 38em;
}

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

.page-about .method-list__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  background-color: var(--ink-2);
}

.page-about .method-list__key {
  min-width: 74px;
  color: var(--orange);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
}

.page-about .method-list__val {
  color: var(--text-dim);
  font-size: 0.92rem;
}

.page-about .about-method__figure {
  margin: 0;
  border: 1px solid var(--about-line);
  background-color: var(--glass);
}

@media (min-width: 900px) {
  .page-about .about-method__grid {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
  }
  .page-about .method-list {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- 团队分工 ---------- */

.page-about .about-team__lede {
  margin: 16px 0 0;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 40em;
}

.page-about .team-panels {
  border-top: 1px solid var(--about-line);
}

.page-about .team-panel {
  border-bottom: 1px solid var(--about-line);
  background-color: transparent;
  transition: background-color 220ms var(--ease);
}

.page-about .team-panel[open] {
  background-color: var(--ink-2);
}

.page-about .team-panel__summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
}

.page-about .team-panel__summary::-webkit-details-marker {
  display: none;
}

.page-about .team-panel__role {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.06rem;
  letter-spacing: -0.01em;
  color: var(--paper);
  position: relative;
  padding-left: 22px;
}

.page-about .team-panel__role::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 10px;
  height: 2px;
  background-color: var(--lime);
  transition: transform 220ms var(--ease);
}

.page-about .team-panel[open] .team-panel__role::before {
  transform: rotate(90deg);
}

.page-about .team-panel__count {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--orange);
  white-space: nowrap;
}

.page-about .team-panel__body {
  padding: 0 4px 22px 22px;
}

.page-about .team-panel__body p {
  margin: 0 0 14px;
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.8;
  max-width: 44em;
}

.page-about .team-panel__body p:last-child {
  margin-bottom: 0;
}

@media (min-width: 900px) {
  .page-about .team-panel__summary {
    padding: 24px 8px;
  }
  .page-about .team-panel__body {
    padding: 0 8px 28px 22px;
  }
}

/* ---------- 发展节点 ---------- */

.page-about .about-timeline__lede {
  margin: 16px 0 0;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 40em;
}

.page-about .timeline {
  border-left: 1px solid var(--about-line);
  padding-left: var(--about-tl-pad);
}

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

.page-about .tl__summary {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl__summary::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--about-tl-pad) - 1px);
  top: 1.72em;
  width: 12px;
  height: 2px;
  background-color: var(--orange);
  transition: width 200ms var(--ease), background-color 200ms var(--ease);
}

.page-about .tl[open] .tl__summary::before {
  width: 26px;
  background-color: var(--lime);
}

.page-about .tl__year {
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .tl__label {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .tl__toggle {
  width: 12px;
  height: 12px;
  position: relative;
  align-self: center;
}

.page-about .tl__toggle::before,
.page-about .tl__toggle::after {
  content: "";
  position: absolute;
  background-color: var(--silver);
}

.page-about .tl__toggle::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 1px;
}

.page-about .tl__toggle::after {
  left: 5.5px;
  top: 0;
  width: 1px;
  height: 12px;
  transition: opacity 200ms var(--ease);
}

.page-about .tl[open] .tl__toggle::after {
  opacity: 0;
}

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

.page-about .tl__body p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.8;
  max-width: 44em;
}

.page-about .about-timeline__figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
  border: 1px solid var(--about-line);
}

@media (min-width: 760px) {
  .page-about .timeline {
    --about-tl-pad: 32px;
  }
  .page-about .tl__summary {
    grid-template-columns: 96px 1fr auto;
    padding: 22px 0;
  }
  .page-about .tl__body {
    padding-left: 96px;
  }
}

/* ---------- 区域协作 ---------- */

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.page-about .about-partners__title {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-partners__text p {
  margin: 0 0 16px;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 38em;
}

.page-about .about-partners__link {
  margin-top: 22px;
}

.page-about .partner-stats {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background-color: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .partner-stats__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 14px;
  background-color: var(--about-soft);
}

.page-about .partner-stats__num {
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-about .partner-stats__label {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-partners__figure {
  margin: 0;
  border: 1px solid var(--about-line);
  background-color: var(--glass);
}

@media (min-width: 900px) {
  .page-about .about-partners__grid {
    grid-template-columns: 5fr 6fr;
    gap: 64px;
  }
  .page-about .about-partners__side {
    margin-top: -32px;
  }
}

/* ---------- 素材与场景 ---------- */

.page-about .about-assets__lede {
  margin: 16px 0 0;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 40em;
}

.page-about .asset-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background-color: var(--about-line);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .asset-item {
  padding: 24px 2px;
  background-color: transparent;
}

.page-about .asset-item__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.04rem;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .asset-item__name::before {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--lime);
  margin-bottom: 14px;
}

.page-about .asset-item__text {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.94rem;
  line-height: 1.78;
  max-width: 30em;
}

.page-about .about-assets__note {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.8;
  max-width: 44em;
}

@media (min-width: 820px) {
  .page-about .asset-grid {
    grid-template-columns: repeat(3, 1fr);
    border-left: 1px solid var(--about-line);
    border-right: 1px solid var(--about-line);
  }
  .page-about .asset-item {
    padding: 28px 24px;
  }
}

/* ---------- 收尾 ---------- */

.page-about .about-next {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-next__inner {
  display: grid;
  gap: 16px;
  border-left: 2px solid var(--lime);
  padding-left: 20px;
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-next__text {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 46em;
}

.page-about .about-next__links {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 900px) {
  .page-about .about-next__inner {
    padding-left: 32px;
  }
}
<<<END>>>