.page-about {
  --about-cut: 22px;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: clip;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0;
}

.page-about p {
  margin: 0 0 1em;
  font-size: 1rem;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--green);
  color: var(--cream);
  padding: 0 0 clamp(40px, 7vw, 88px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(248, 241, 228, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(248, 241, 228, .07) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -30%;
  right: -20%;
  width: 70%;
  height: 170%;
  background: linear-gradient(115deg,
    transparent 42%,
    rgba(242, 161, 26, .16) 42%,
    rgba(242, 161, 26, .16) 48%,
    transparent 48%);
  pointer-events: none;
}

.page-about .about-hero__crumbs {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(248, 241, 228, .72);
}

.page-about .about-hero__crumbs .crumbs__link {
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-about .about-hero__crumbs .crumbs__link:hover,
.page-about .about-hero__crumbs .crumbs__link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-about .about-hero__crumbs .crumbs__sep {
  color: rgba(248, 241, 228, .45);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: clamp(24px, 5vw, 48px);
  padding-top: clamp(28px, 5vw, 56px);
}

.page-about .about-hero__eyebrow {
  color: var(--amber);
  margin: 0 0 18px;
}

.page-about .about-hero__title {
  font-size: clamp(2rem, 8vw, 4.4rem);
  font-weight: 300;
  letter-spacing: -.01em;
  color: var(--cream);
  margin-bottom: 20px;
}

.page-about .about-hero__lede {
  max-width: 40ch;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  color: rgba(248, 241, 228, .84);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 26px;
}

.page-about .about-hero__more {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid rgba(248, 241, 228, .5);
  padding-bottom: 2px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .about-hero__more:hover,
.page-about .about-hero__more:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-about .about-hero__panel {
  background: var(--orange);
  color: var(--ink);
  padding: clamp(18px, 3vw, 28px);
  align-self: end;
  clip-path: polygon(
    var(--about-cut) 0,
    100% 0,
    100% calc(100% - var(--about-cut)),
    calc(100% - var(--about-cut)) 100%,
    0 100%,
    0 var(--about-cut)
  );
}

.page-about .about-hero__panel-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin: 0 0 14px;
  color: rgba(23, 26, 22, .72);
}

.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-stats__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(23, 26, 22, .18);
}

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

.page-about .about-stats__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.6vw, 1.75rem);
  line-height: 1;
}

.page-about .about-stats__label {
  font-size: 13px;
  text-align: right;
  color: rgba(23, 26, 22, .78);
}

/* ---------- 通用区块节奏 ---------- */
.page-about .about-origin,
.page-about .about-scope,
.page-about .about-timeline,
.page-about .about-team,
.page-about .about-network,
.page-about .about-join {
  padding: clamp(44px, 8vw, 92px) 0;
}

.page-about .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 20px;
  padding-bottom: 14px;
  border-bottom: var(--line);
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .section-head__title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .section-head__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .about-link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--caramel);
  border-bottom-color: var(--green);
}

.page-about .about-link--strong {
  display: inline-block;
  padding: 10px 18px;
  background: var(--green);
  color: var(--cream);
  border-bottom: 0;
  border-radius: var(--radius);
}

.page-about .about-link--strong:hover,
.page-about .about-link--strong:focus-visible {
  background: var(--green-700);
  color: var(--amber);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  border: var(--line);
  background: var(--paper);
  padding: 10px;
}

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

.page-about .about-figure__cap {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--muted);
  padding: 10px 2px 0;
  line-height: 1.6;
}

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

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-origin__title {
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  font-weight: 700;
  margin: 12px 0 18px;
}

.page-about .about-points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-points__item {
  position: relative;
  padding-left: 22px;
  font-size: .9375rem;
  color: var(--green);
}

.page-about .about-points__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 10px;
  height: 10px;
  background: var(--orange);
  transform: rotate(45deg);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-scope {
  background: var(--paper);
  border-top: var(--line);
  border-bottom: var(--line);
}

.page-about .about-scope__grid {
  display: grid;
  gap: var(--gap);
}

.page-about .about-scope__card {
  background: var(--cream);
  border: var(--line);
  padding: clamp(18px, 3vw, 28px);
}

.page-about .about-scope__card--core {
  border-top: 4px solid var(--green);
}

.page-about .about-scope__card--delta {
  border-top: 4px solid var(--orange);
}

.page-about .about-scope__card--near {
  background: var(--green);
  color: var(--cream);
  border-color: transparent;
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--about-cut)),
    calc(100% - var(--about-cut)) 100%,
    0 100%
  );
}

.page-about .about-scope__tag {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--caramel);
}

.page-about .about-scope__card--near .about-scope__tag {
  color: var(--amber);
}

.page-about .about-scope__title {
  font-size: clamp(1.15rem, 2.6vw, 1.4rem);
  font-weight: 700;
  margin-bottom: 12px;
}

.page-about .about-scope__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: .9375rem;
}

.page-about .about-scope__list li {
  padding-left: 16px;
  position: relative;
}

.page-about .about-scope__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 1px;
  background: var(--orange);
}

.page-about .about-scope__card--near .about-scope__list li::before {
  background: var(--amber);
}

.page-about .about-scope__card--near p {
  color: rgba(248, 241, 228, .86);
}

.page-about .about-scope__link-row {
  margin: 18px 0 0;
}

.page-about .about-scope__card--near .about-link {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-about .about-scope__card--near .about-link:hover,
.page-about .about-scope__card--near .about-link:focus-visible {
  color: var(--cream);
  border-bottom-color: var(--cream);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  background: var(--cream);
}

.page-about .about-timeline__layout {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
}

.page-about .about-timeline__rail {
  display: none;
}

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

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--green) 0%, var(--muted) 60%, transparent 100%);
}

.page-about .tl-item {
  position: relative;
  margin-bottom: 16px;
}

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

.page-about .tl-item__dot {
  position: absolute;
  left: -26px;
  top: 26px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--green);
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .tl-item__card {
  background: var(--paper);
  border-left: 3px solid var(--muted);
  padding: 16px 18px;
  transition: transform var(--t-mid) var(--ease),
              border-color var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease);
}

.page-about .tl-item:hover .tl-item__card,
.page-about .tl-item:focus-within .tl-item__card {
  transform: translateY(-3px);
  border-left-color: var(--orange);
  box-shadow: 0 8px 20px rgba(11, 59, 46, .1);
}

.page-about .tl-item:hover .tl-item__dot,
.page-about .tl-item:focus-within .tl-item__dot {
  background: var(--amber);
  border-color: var(--green);
}

.page-about .tl-item__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  background: var(--green);
  color: var(--cream);
  padding: 2px 9px;
  margin-bottom: 10px;
}

.page-about .tl-item__title {
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  font-weight: 700;
  margin-bottom: 8px;
}

.page-about .tl-item__more {
  margin: 0;
  font-size: .9375rem;
  color: #2c3530;
}

.page-about .tl-item--media {
  margin-bottom: 20px;
}

.page-about .tl-item--media .about-figure {
  background: var(--cream);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--green);
  color: var(--cream);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-team .eyebrow {
  color: var(--amber);
  margin: 0 0 12px;
}

.page-about .about-team__title {
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  font-weight: 700;
  color: var(--cream);
  margin-bottom: 18px;
}

.page-about .about-team__body p {
  color: rgba(248, 241, 228, .86);
}

.page-about .about-team__bars {
  display: grid;
  gap: 14px;
  margin: 26px 0 18px;
}

.page-about .team-bar {
  display: grid;
  grid-template-columns: 88px 1fr auto;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .team-bar__label {
  color: var(--amber);
  letter-spacing: .06em;
}

.page-about .team-bar__track {
  display: block;
  height: 10px;
  background: rgba(248, 241, 228, .16);
  border-radius: 2px;
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  width: var(--bar-w, 0%);
  background: linear-gradient(90deg, var(--orange), var(--amber));
}

.page-about .team-bar--a { --bar-w: 43%; }
.page-about .team-bar--b { --bar-w: 21%; }
.page-about .team-bar--c { --bar-w: 36%; }

.page-about .team-bar__num {
  color: var(--cream);
  font-size: 12px;
}

.page-about .about-team__note {
  font-size: .875rem;
  color: rgba(248, 241, 228, .66);
  border-top: 1px solid rgba(248, 241, 228, .2);
  padding-top: 14px;
  margin: 0;
}

.page-about .about-figure--team {
  background: rgba(248, 241, 228, .08);
  border-color: rgba(248, 241, 228, .24);
}

.page-about .about-figure--team .about-figure__cap {
  color: rgba(248, 241, 228, .7);
}

/* ---------- 合作网络 ---------- */
.page-about .about-network {
  background: var(--cream);
}

.page-about .about-network__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-network__graph {
  background: var(--paper);
  border: var(--line);
  padding: 12px;
}

.page-about .about-net {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-net__links line {
  stroke: var(--green-700);
  stroke-width: 1;
  stroke-dasharray: 4 5;
  opacity: .55;
}

.page-about .about-net__nodes circle {
  fill: var(--orange);
  stroke: var(--green);
  stroke-width: 2;
  transition: fill var(--t-fast) var(--ease), r var(--t-fast) var(--ease);
}

.page-about .about-net__nodes circle:hover {
  fill: var(--amber);
}

.page-about .about-net__core {
  fill: var(--green);
}

.page-about .about-net__core-text {
  fill: var(--cream);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  text-anchor: middle;
}

.page-about .about-net__core-text--sub {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  fill: var(--amber);
  letter-spacing: .08em;
}

.page-about .about-net__label {
  fill: var(--green);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  text-anchor: middle;
}

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

.page-about .about-fact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 0;
  border-bottom: var(--line);
}

.page-about .about-fact:first-child {
  border-top: var(--line);
}

.page-about .about-fact__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 5vw, 2rem);
  line-height: 1;
  color: var(--green);
}

.page-about .about-fact__text {
  font-size: .9375rem;
  color: #2c3530;
}

/* ---------- 入驻流程 ---------- */
.page-about .about-join {
  background: var(--paper);
  border-top: var(--line);
}

.page-about .about-join__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--gap);
}

.page-about .about-step {
  background: var(--cream);
  border: var(--line);
  padding: clamp(18px, 3vw, 26px);
  position: relative;
}

.page-about .about-step::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 0 22px 22px;
  border-color: transparent transparent var(--orange) transparent;
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--caramel);
}

.page-about .about-step__title {
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  font-weight: 700;
  margin: 10px 0 8px;
}

.page-about .about-step__text {
  margin: 0;
  font-size: .9375rem;
  color: #2c3530;
}

.page-about .about-join__foot {
  margin-top: clamp(22px, 4vw, 34px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 18px;
  border-top: var(--line);
}

.page-about .about-join__foot p {
  margin: 0;
  max-width: 56ch;
  font-size: .9375rem;
  color: var(--green);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background: var(--orange);
  color: var(--ink);
  padding: clamp(36px, 6vw, 64px) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 22px;
}

.page-about .about-cta__eyebrow {
  color: rgba(23, 26, 22, .7);
  margin: 0 0 10px;
}

.page-about .about-cta__title {
  font-size: clamp(1.4rem, 4.2vw, 2.1rem);
  font-weight: 700;
  max-width: 26ch;
}

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

.page-about .about-cta__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid rgba(23, 26, 22, .45);
  padding: 11px 18px;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  background: var(--cream);
  border-color: var(--green);
}

.page-about .about-cta__link--solid {
  background: var(--green);
  color: var(--cream);
  border-color: var(--green);
}

.page-about .about-cta__link--solid:hover,
.page-about .about-cta__link--solid:focus-visible {
  background: var(--green-700);
  color: var(--amber);
}

/* ---------- 焦点可见 ---------- */
.page-about a:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .about-scope__card--near {
    grid-column: 1 / -1;
  }

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) auto;
    align-items: end;
  }

  .page-about .about-cta__links {
    justify-content: flex-end;
  }

  .page-about .about-fact {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-about .about-team__bars {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }

  .page-about .about-timeline__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2.2fr);
    align-items: start;
  }

  .page-about .about-timeline__rail {
    display: block;
    position: sticky;
    top: 24px;
    align-self: start;
  }

  .page-about .about-timeline__rail-inner {
    border-left: 1px solid var(--green);
    padding: 4px 0 4px 18px;
  }

  .page-about .about-timeline__rail-year {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    line-height: 1.05;
    color: var(--green);
    margin: 0 0 14px;
    letter-spacing: -.01em;
  }

  .page-about .about-timeline__rail-line {
    display: block;
    width: 46px;
    height: 3px;
    background: var(--orange);
    margin-bottom: 14px;
  }

  .page-about .about-timeline__rail-note {
    font-size: .875rem;
    color: var(--muted);
    margin: 0;
    max-width: 22ch;
  }

  .page-about .about-timeline__list {
    padding-left: 34px;
  }

  .page-about .about-timeline__list::before {
    left: 6px;
  }

  .page-about .tl-item__dot {
    left: -34px;
    top: 28px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item__card,
  .page-about .tl-item__dot,
  .page-about .about-net__nodes circle,
  .page-about a {
    transition: none;
  }

  .page-about .tl-item:hover .tl-item__card,
  .page-about .tl-item:focus-within .tl-item__card {
    transform: none;
  }
}
<<<END>>>