.page-about {
  --about-rail: 78px;
  background: var(--ink);
  color: var(--silver);
  overflow-x: clip;
}

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

.page-about .about-crumbs {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 4vw, 40px) 0 clamp(40px, 7vw, 80px);
}

.page-about .about-hero-inner {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: end;
}

.page-about .about-title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(38px, 8.4vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--chalk);
}

.page-about .about-lead {
  margin: 20px 0 0;
  max-width: 34em;
  color: var(--chalk);
  opacity: 0.86;
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 18px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-fact-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 22px;
  color: var(--fluoro);
  letter-spacing: 0.02em;
}

.page-about .about-fact-label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--dim);
  line-height: 1.5;
}

.page-about .about-hero-frame {
  padding: 0;
  overflow: hidden;
  background: linear-gradient(160deg, var(--turf), var(--ink) 72%);
}

.page-about .about-hero-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 7;
  object-fit: cover;
  filter: contrast(1.06) saturate(0.9);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
}

.page-about .about-chapter-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(12px, 2vw, 20px);
  padding-top: clamp(44px, 7vw, 84px);
  padding-bottom: clamp(44px, 7vw, 84px);
}

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

.page-about .chapter-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--fluoro);
}

.page-about .chapter-name {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--dim);
}

.page-about .about-chapter h2 {
  margin: 8px 0 0;
}

.page-about .about-text {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 分区底色 ---------- */
.page-about .about-chapter--ink {
  background: var(--ink);
}

.page-about .about-chapter--ochre {
  background: var(--ochre);
  color: var(--chalk);
}

.page-about .about-chapter--ochre::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(244, 247, 245, 0.14) 0 1px, transparent 1px 28px);
  opacity: 0.28;
}

.page-about .about-chapter--turf {
  background: var(--turf);
}

.page-about .about-chapter--wine {
  background: var(--wine);
}

.page-about .about-chapter--paper {
  background: var(--paper);
  color: #3a362f;
}

.page-about .about-chapter--ochre h2,
.page-about .about-chapter--turf h2,
.page-about .about-chapter--wine h2 {
  color: var(--chalk);
}

.page-about .about-chapter--ochre .about-text {
  color: rgba(244, 247, 245, 0.9);
}

.page-about .about-chapter--ochre .chapter-name,
.page-about .about-chapter--ochre .chapter-num {
  color: var(--chalk);
}

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

.page-about .about-chapter--paper .about-text {
  color: #3a362f;
}

.page-about .about-chapter--paper .eyebrow {
  color: var(--ochre);
}

.page-about .about-chapter--paper .chapter-num {
  color: var(--ochre);
}

.page-about .about-chapter--paper .chapter-name {
  color: #6b6459;
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .tl-item {
  position: relative;
  padding: 4px 0 26px 24px;
  border-left: 1px solid rgba(244, 247, 245, 0.4);
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 14px;
  height: 1px;
  background: var(--chalk);
}

.page-about .tl-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--chalk);
}

.page-about .tl-title {
  margin: 8px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--chalk);
  letter-spacing: -0.01em;
}

.page-about .tl-desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 247, 245, 0.82);
  max-width: 30em;
}

/* ---------- 团队 ---------- */
.page-about .team-split {
  display: grid;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .team-bar {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 6px 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: rgba(7, 17, 15, 0.34);
  transition: border-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-about .team-bar::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--fill, 40%);
  background: linear-gradient(90deg, rgba(31, 122, 110, 0.9), rgba(232, 128, 63, 0.4));
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 100%, 0 100%);
  opacity: 0.34;
  transition: opacity 180ms var(--ease);
}

.page-about .team-bar > * {
  position: relative;
  z-index: 1;
}

.page-about .team-bar--a {
  --fill: 100%;
}

.page-about .team-bar--b {
  --fill: 67%;
}

.page-about .team-bar--c {
  --fill: 34%;
}

.page-about .team-bar:hover {
  border-color: var(--ember);
  transform: translateY(-2px);
}

.page-about .team-bar:hover::before {
  opacity: 0.58;
}

.page-about .team-count {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 28px;
  line-height: 1;
  color: var(--fluoro);
}

.page-about .team-role {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--chalk);
}

.page-about .team-note {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--silver);
  opacity: 0.86;
}

.page-about .about-team-media,
.page-about .about-eco-media {
  margin: clamp(24px, 4vw, 36px) 0 0;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--turf), var(--ink) 78%);
}

.page-about .about-team-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: contrast(1.05) saturate(0.92);
}

.page-about .about-cap {
  display: block;
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--dim);
}

.page-about .about-chapter--paper .about-eco-media {
  border-color: rgba(7, 17, 15, 0.22);
}

.page-about .about-eco-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: contrast(1.04) saturate(0.94);
}

.page-about .about-chapter--paper .about-cap {
  border-top-color: rgba(7, 17, 15, 0.22);
  color: #6b6459;
}

/* ---------- 内容准则 ---------- */
.page-about .std-grid {
  display: grid;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .std-item {
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(244, 247, 245, 0.03);
  transition: border-color 180ms var(--ease);
}

.page-about .std-item:hover {
  border-color: var(--ember);
}

.page-about .std-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--fluoro);
}

.page-about .std-title {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--chalk);
}

.page-about .std-desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--silver);
  opacity: 0.86;
}

.page-about .fold-group {
  margin-top: clamp(24px, 4vw, 36px);
}

/* ---------- 合作生态 ---------- */
.page-about .eco-list {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  border-top: 1px solid rgba(7, 17, 15, 0.2);
}

.page-about .eco-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 8px 12px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(7, 17, 15, 0.2);
  transition: background-color 180ms var(--ease);
}

.page-about .eco-row:hover {
  background: rgba(140, 58, 39, 0.07);
}

.page-about .eco-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ochre);
}

.page-about .eco-tag {
  justify-self: start;
  padding: 2px 8px;
  border: 1px solid rgba(140, 58, 39, 0.48);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ochre);
}

.page-about .eco-name {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about .eco-desc {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #4a453c;
  max-width: 36em;
}

/* ---------- 服务承诺 ---------- */
.page-about .about-promise {
  padding: clamp(22px, 4vw, 40px);
  background: linear-gradient(155deg, rgba(14, 59, 56, 0.85), rgba(7, 17, 15, 0.95));
}

.page-about .promise-grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(22px, 3vw, 30px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-about .promise-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .promise-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.1;
  color: var(--fluoro);
  letter-spacing: 0.02em;
}

.page-about .promise-label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--dim);
}

.page-about .promise-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .about-next {
  margin: 24px 0 0;
  font-size: 14px;
  color: var(--dim);
}

.page-about .about-next a {
  color: var(--chalk);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

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

.page-about .about-next-sep {
  display: inline-block;
  margin: 0 10px;
  color: var(--line-strong);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .about-chapter-inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 56px);
    padding-top: clamp(64px, 8vw, 104px);
    padding-bottom: clamp(64px, 8vw, 104px);
  }

  .page-about .chapter-rail {
    writing-mode: vertical-rl;
    align-self: start;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    gap: 14px;
  }

  .page-about .chapter-rail::after {
    content: "";
    display: block;
    width: 1px;
    height: 56px;
    background: var(--line-strong);
  }

  .page-about .about-chapter--paper .chapter-rail::after {
    background: rgba(7, 17, 15, 0.3);
  }

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

  .page-about .tl-item {
    border-left: 0;
    border-top: 1px solid rgba(244, 247, 245, 0.45);
    padding: 26px 20px 0 0;
  }

  .page-about .tl-item::before {
    left: 0;
    top: 0;
    width: 1px;
    height: 16px;
  }

  .page-about .eco-row {
    grid-template-columns: 64px auto minmax(0, 1fr);
    gap: 6px 18px;
    padding: 20px 8px;
  }

  .page-about .eco-name {
    grid-column: auto;
  }

  .page-about .eco-desc {
    grid-column: 3;
    margin-top: 4px;
  }

  .page-about .about-team-img {
    aspect-ratio: 16 / 9;
  }

  .page-about .about-promise {
    padding: clamp(28px, 3.4vw, 48px);
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero-frame {
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-bar,
  .page-about .team-bar::before,
  .page-about .std-item,
  .page-about .eco-row,
  .page-about .about-next a {
    transition: none;
  }

  .page-about .team-bar:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>