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

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding: 26px 0 6px;
  font-size: 13px;
}
.page-about .crumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 10px;
  color: var(--c-moss);
  font-family: var(--font-data);
  letter-spacing: 0.04em;
}
.page-about .crumbs a {
  color: var(--c-moss);
  text-decoration: none;
  transition: color 0.24s var(--ease);
}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--c-cyan);
}
.page-about .crumbs li + li::before {
  content: "／";
  margin-right: 10px;
  color: var(--c-line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(30px, 5.5vw, 64px) 0 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-kicker {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-cyan);
  margin: 0 0 clamp(24px, 4vw, 40px);
  display: flex;
  align-items: center;
  gap: 14px;
}
.page-about .about-kicker::before {
  content: "";
  display: block;
  flex: none;
  width: clamp(24px, 4vw, 48px);
  height: 1px;
  background: var(--c-cyan);
}

.page-about h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0 0 clamp(22px, 3.4vw, 34px);
  max-width: 17ch;
  color: var(--c-paper);
}

.page-about .about-lede {
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.78;
  color: var(--c-mist);
  max-width: 62ch;
  margin: 0 0 clamp(36px, 5.5vw, 60px);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--c-line);
  border-left: 1px solid var(--c-line);
  margin-bottom: clamp(36px, 5.5vw, 68px);
}
.page-about .about-hero-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 26px);
  border-right: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}
.page-about .about-hero-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}
.page-about .about-hero-unit {
  font-size: 0.5em;
  color: var(--c-cyan);
  margin-left: 3px;
  vertical-align: 0.32em;
}
.page-about .about-hero-label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-moss);
}

.page-about .about-hero-media {
  margin: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: clamp(60px, 9vw, 124px) 0;
}
.page-about .about-section + .about-section {
  border-top: 1px solid var(--c-line);
}

.page-about .about-num {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(28px, 4.4vw, 50px);
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1.2px var(--c-cyan);
  margin: 0 0 clamp(16px, 2.2vw, 26px);
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.5vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0 0 clamp(18px, 2.4vw, 28px);
  color: var(--c-paper);
}

.page-about .about-section-lede {
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.78;
  color: var(--c-moss);
  max-width: 54ch;
  margin: 0 0 clamp(36px, 5vw, 60px);
}

.page-about .about-scope .grid-12,
.page-about .about-team .grid-12 {
  row-gap: 34px;
}
.page-about .about-aside,
.page-about .about-main {
  grid-column: 1 / -1;
}

.page-about .about-main p {
  font-size: 17px;
  line-height: 1.78;
  color: var(--c-mist);
  margin: 0 0 22px;
  max-width: 64ch;
}
.page-about .about-main p:last-child {
  margin-bottom: 0;
}

.page-about .about-quote {
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding-left: 22px;
  border-left: 2px solid var(--c-gold);
}
.page-about .about-quote p {
  font-family: var(--font-editorial);
  font-size: clamp(17px, 1.9vw, 22px);
  line-height: 1.6;
  color: var(--c-gold);
  margin: 0;
  max-width: 32ch;
}

/* ---------- 从数据源到页面 ---------- */
.page-about .about-flow-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 48px);
  align-items: start;
}
.page-about .about-flow-text p {
  font-size: 17px;
  line-height: 1.78;
  color: var(--c-mist);
  margin: 0 0 22px;
  max-width: 64ch;
}
.page-about .about-flow-text p:last-child {
  margin-bottom: 0;
}
.page-about .about-flow-media {
  margin: 0;
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--c-cyan) 0%, var(--c-line) 46%, var(--c-line) 100%);
}

.page-about .about-tl-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 0 0 clamp(30px, 4vw, 44px);
}
.page-about .about-tl-item:last-child {
  padding-bottom: 0;
}
.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-ink);
  border: 2px solid var(--c-line);
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.page-about .about-tl-item.is-inview::before {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  box-shadow: 0 0 0 5px rgba(0, 229, 195, 0.12), 0 0 14px rgba(0, 229, 195, 0.45);
}

.page-about .about-tl-year {
  font-family: var(--font-data);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
}
.page-about .about-tl-body h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.3;
  letter-spacing: -0.005em;
  margin: 0 0 8px;
  color: var(--c-paper);
}
.page-about .about-tl-body p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-moss);
  margin: 0;
  max-width: 58ch;
}

/* ---------- 团队数据 ---------- */
.page-about .about-team-stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(22px, 4vw, 56px);
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--c-line);
}
.page-about .about-team-stat {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.page-about .about-team-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(28px, 3.8vw, 46px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-gold);
}
.page-about .about-team-label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-moss);
}

/* ---------- 资质 ---------- */
.page-about .about-cert-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 46px) clamp(36px, 6vw, 80px);
}
.page-about .about-cert {
  position: relative;
  padding-top: 22px;
}
.page-about .about-cert::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 34px;
  height: 2px;
  background: var(--c-line);
  transition: background 0.3s var(--ease), width 0.3s var(--ease);
}
.page-about .about-cert:hover::before,
.page-about .about-cert:focus-within::before {
  background: var(--c-cyan);
  width: 66px;
}
.page-about .about-cert h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.42;
  margin: 0 0 10px;
  color: var(--c-paper);
}
.page-about .about-cert p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-moss);
  margin: 0;
  max-width: 42ch;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco-media {
  margin: 0 0 clamp(34px, 5vw, 56px);
}
.page-about .about-eco-body p {
  font-size: 17px;
  line-height: 1.78;
  color: var(--c-mist);
  margin: 0 0 22px;
  max-width: 68ch;
}
.page-about .about-eco-links {
  margin-top: clamp(22px, 3vw, 34px);
}

/* ---------- 从这里继续 ---------- */
.page-about .about-next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--c-line);
  margin-top: clamp(30px, 4vw, 46px);
}
.page-about .about-next-card {
  display: block;
  position: relative;
  padding: clamp(26px, 3.4vw, 40px) clamp(20px, 3vw, 32px);
  border-bottom: 1px solid var(--c-line);
  text-decoration: none;
  color: inherit;
  transition: background 0.3s var(--ease);
}
.page-about .about-next-card:hover,
.page-about .about-next-card:focus-visible {
  background: rgba(0, 229, 195, 0.05);
}
.page-about .about-next-card::after {
  content: "→";
  position: absolute;
  top: clamp(26px, 3.4vw, 40px);
  right: clamp(20px, 3vw, 32px);
  font-family: var(--font-data);
  font-size: 15px;
  color: var(--c-line);
  transition: color 0.3s var(--ease), transform 0.3s var(--ease);
}
.page-about .about-next-card:hover::after,
.page-about .about-next-card:focus-visible::after {
  color: var(--c-cyan);
  transform: translateX(4px);
}
.page-about .about-next-tag {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cyan);
  margin-bottom: 16px;
}
.page-about .about-next-card h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.4;
  margin: 0 0 12px;
  color: var(--c-paper);
}
.page-about .about-next-card p {
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-moss);
  margin: 0;
  padding-right: 28px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-tl-item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }
  .page-about .about-tl-year {
    padding-top: 4px;
  }
  .page-about .about-cert-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-next-card {
    border-bottom: 1px solid var(--c-line);
    border-right: 1px solid var(--c-line);
  }
  .page-about .about-next-card:last-child {
    border-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-aside {
    grid-column: 1 / span 3;
  }
  .page-about .about-main {
    grid-column: 5 / span 8;
  }
  .page-about .about-flow-grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 1fr);
    gap: clamp(48px, 7vw, 96px);
  }
}

@media (min-width: 1100px) {
  .page-about .about-cert-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-timeline {
    padding-left: 44px;
  }
  .page-about .about-timeline::before {
    left: 7px;
  }
  .page-about .about-tl-item::before {
    left: -44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl-item::before,
  .page-about .about-cert::before,
  .page-about .about-next-card,
  .page-about .about-next-card::after,
  .page-about .crumbs a {
    transition: none;
  }
}