.page-about {
  --about-rail: 190px;
  --about-edge: 1px solid var(--hair-soft);
  background: var(--paper);
  color: var(--black);
}

.page-about .about-crumbs {
  padding-top: clamp(14px, 2vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(26px, 4.6vw, 60px) 0 clamp(32px, 5vw, 72px);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}

.page-about .about-hero-main h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7.2vw, 74px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--ink);
  border-top: 5px solid var(--clay);
  padding-top: clamp(14px, 2vw, 22px);
  max-width: 15ch;
}

.page-about .about-hero-main .lead {
  margin-top: clamp(16px, 2.4vw, 26px);
  max-width: 54ch;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-score {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(20px, 3vw, 32px);
  border-left: 6px solid var(--line);
}

.page-about .about-score::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 46px;
  height: 46px;
  background: var(--clay);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

.page-about .score-cap {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--line);
}

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

.page-about .score-list li {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 8px;
  padding: 14px 0;
  border-top: 1px solid var(--hair-dark);
}

.page-about .score-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .score-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(38px, 5.2vw, 56px);
  line-height: 1;
  color: var(--line);
  font-variant-numeric: tabular-nums;
}

.page-about .score-unit {
  font-size: 14px;
  color: var(--paper);
  padding-bottom: 4px;
}

.page-about .score-label {
  grid-column: 3;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(244, 239, 227, 0.76);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-rail {
  border-top: 1px solid var(--hair);
  padding-top: 12px;
  margin-bottom: clamp(24px, 4vw, 36px);
}

.page-about .rail-cap {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--stone);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}

.page-about .rail-list a {
  display: inline-block;
  font-size: 13px;
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

.page-about .about-section {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--hair-soft);
}

.page-about .about-section:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-about .about-section .section-title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.8vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 22ch;
}

.page-about .about-intro {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-prose {
  margin-top: clamp(16px, 2.4vw, 24px);
  max-width: 64ch;
}

.page-about .about-prose--tight {
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .about-prose p {
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

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

/* ---------- 主张引用 ---------- */
.page-about .about-quote {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: clamp(22px, 3.4vw, 40px);
  background: var(--clay);
  color: var(--paper);
  border-left: 8px solid var(--ink);
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.18;
  letter-spacing: 0.01em;
}

.page-about .about-quote cite {
  display: block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(244, 239, 227, 0.82);
}

/* ---------- Bento 能力块 ---------- */
.page-about .about-bento {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--grid-gap);
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-about .about-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--white);
  border: 1px solid var(--hair-soft);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-about .about-card:hover {
  border-color: var(--clay);
}

.page-about .about-card--clay {
  border-left: 5px solid var(--clay);
}

.page-about .about-card--table {
  background: var(--table);
  border-color: transparent;
}

.page-about .about-card--deep {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.page-about .about-card--deep:hover {
  border-color: var(--line);
}

.page-about .card-no {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--terracotta);
}

.page-about .about-card--deep .card-no {
  color: var(--line);
}

.page-about .about-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.2;
  color: var(--ink);
}

.page-about .about-card--deep h3 {
  color: var(--paper);
}

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

.page-about .about-card--deep p {
  color: rgba(244, 239, 227, 0.84);
}

.page-about .card-meta {
  margin-top: auto;
  padding-top: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
  border-top: 1px solid var(--hair-soft);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(20px, 3vw, 32px) 0 0;
}

.page-about .about-figure .media {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--hair-soft);
}

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

.page-about .about-figure .media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: var(--hair);
}

.page-about .about-stage {
  position: relative;
  padding-left: 54px;
  margin-bottom: clamp(12px, 2vw, 18px);
}

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

.page-about .stage-no {
  position: absolute;
  left: 0;
  top: 4px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  z-index: 1;
}

.page-about .stage-details {
  border-bottom: 1px solid var(--hair-soft);
}

.page-about .stage-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 46px;
  padding: 10px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .stage-summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--clay);
}

.page-about .stage-details[open] .stage-summary::after {
  content: "\2212";
}

.page-about .stage-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(16px, 1.9vw, 21px);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .stage-details[open] .stage-title {
  color: var(--clay);
}

.page-about .stage-body {
  padding: 0 0 18px;
}

.page-about .stage-body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.4vw, 36px);
  margin-top: clamp(20px, 3.4vw, 32px);
}

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

.page-about .team-num {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hair-soft);
}

.page-about .team-num:first-child {
  border-top: 1px solid var(--hair-soft);
}

.page-about .team-count {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1;
  color: var(--clay);
  font-variant-numeric: tabular-nums;
}

.page-about .team-role {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--stone);
}

.page-about .about-team-copy > p {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
}

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

.page-about .about-figure--team .media {
  aspect-ratio: 4 / 3;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.4vw, 36px);
  margin-top: clamp(22px, 3.4vw, 34px);
  align-items: start;
}

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

.page-about .eco-node {
  display: grid;
  gap: 3px;
  padding: 16px 18px;
  background: var(--white);
  border: 1px solid var(--hair-soft);
  border-top: 3px solid var(--moss);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-about .eco-node:hover {
  border-top-color: var(--line);
  transform: translateY(-2px);
}

.page-about .eco-count {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .eco-name {
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .eco-tag {
  justify-self: start;
  margin-top: 6px;
  padding: 3px 8px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--moss);
  background: rgba(66, 88, 70, 0.1);
  transition: background 0.18s ease, color 0.18s ease;
}

.page-about .eco-node:hover .eco-tag,
.page-about .eco-node:focus-within .eco-tag {
  background: var(--line);
  color: var(--ink);
}

.page-about .about-figure--eco {
  margin-top: 0;
}

.page-about .about-honor {
  margin-top: clamp(24px, 3.6vw, 40px);
  padding: clamp(18px, 3vw, 28px);
  background: var(--paper);
  border: 1px solid var(--hair);
  border-left: 6px solid var(--terracotta);
}

.page-about .honor-cap {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--stone);
}

.page-about .honor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .honor-note {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 服务节奏 ---------- */
.page-about .about-promise {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 3.4vw, 30px);
}

.page-about .promise-item {
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--white);
  border: 1px solid var(--hair-soft);
  border-bottom: 3px solid var(--table);
}

.page-about .promise-key {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--terracotta);
}

.page-about .promise-item h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.25;
  color: var(--ink);
}

.page-about .promise-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  margin-top: clamp(26px, 4vw, 44px);
  padding: clamp(22px, 3.6vw, 40px);
  background: var(--ink);
  color: var(--paper);
  border-top: 6px solid var(--line);
}

.page-about .about-cta h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-cta-text p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 239, 227, 0.82);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(16px, 2.4vw, 24px);
}

.page-about .about-fineprint {
  margin: 16px 0 0;
  font-size: 12px;
  color: var(--stone);
}

.page-about .about-fineprint a {
  color: var(--clay);
  text-decoration: none;
  border-bottom: 1px solid var(--clay);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-bento {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-card--wide {
    grid-column: span 2;
  }

  .page-about .team-nums {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .team-num {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 16px;
    border: 1px solid var(--hair-soft);
    border-top: 3px solid var(--clay);
  }

  .page-about .team-num:first-child {
    border-top: 3px solid var(--clay);
  }

  .page-about .team-count {
    grid-row: auto;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: clamp(32px, 4.4vw, 56px);
  }

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

  .page-about .about-eco {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 24px;
    margin-bottom: 0;
    padding-top: 14px;
  }

  .page-about .rail-list {
    display: block;
  }

  .page-about .rail-list li {
    margin-bottom: 11px;
  }

  .page-about .rail-list li:last-child {
    margin-bottom: 0;
  }

  .page-about .about-bento {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-card--wide {
    grid-column: span 6;
  }

  .page-about .about-card {
    grid-column: span 3;
  }

  .page-about .about-bento .about-card:nth-child(4) {
    grid-column: span 3;
  }

  .page-about .about-bento .about-card:nth-child(5) {
    grid-column: span 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card,
  .page-about .eco-node,
  .page-about .eco-tag,
  .page-about .rail-list a {
    transition: none;
  }

  .page-about .eco-node:hover {
    transform: none;
  }
}
<<<END>>>