.page-about {
  --about-line: rgba(10, 18, 32, 0.12);
  --about-head-size: clamp(26px, 4.2vw, 42px);
  --about-gap: clamp(20px, 3.4vw, 40px);
  background: var(--c-cloud);
  color: var(--c-ink);
  overflow-x: clip;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
}

.page-about p {
  margin: 0;
}

.page-about ul,
.page-about ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4.6vw, 44px) 0 clamp(56px, 9vw, 96px);
  background:
    radial-gradient(115% 85% at 100% 0%, rgba(43, 30, 90, 0.92) 0%, rgba(43, 30, 90, 0) 58%),
    linear-gradient(158deg, var(--c-blue) 0%, var(--c-blue-deep) 52%, var(--c-teal) 100%);
  color: var(--c-cloud);
  clip-path: polygon(0 0, 100% 0, 100% 96%, 0 100%);
}

.page-about .about-hero .as-breadcrumb a,
.page-about .about-hero .as-breadcrumb__sep {
  color: rgba(244, 247, 251, 0.66);
}

.page-about .about-hero .as-breadcrumb__current {
  color: var(--c-cloud);
}

.page-about .about-hero__split {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(18px, 3vw, 32px);
}

.page-about .about-hero__lead h1 {
  font-size: clamp(34px, 6.4vw, 66px);
  line-height: 1.02;
  margin: 12px 0 0;
  max-width: 16ch;
}

.page-about .about-hero__intro {
  margin-top: clamp(16px, 2.4vw, 24px);
  max-width: 58ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: rgba(244, 247, 251, 0.82);
}

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

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-line-light);
  box-shadow: var(--shadow-deep);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 14 / 8;
  object-fit: cover;
}

.page-about .about-hero__caption {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(6, 39, 65, 0.78);
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.page-about .about-hero__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 4.4vw, 48px);
  background: rgba(244, 247, 251, 0.16);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: clamp(14px, 2.4vw, 22px) clamp(14px, 2.4vw, 24px);
  background: rgba(8, 46, 82, 0.62);
}

.page-about .about-metric__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--c-cloud);
}

.page-about .about-metric__num em {
  font-style: normal;
  font-size: 0.56em;
  color: var(--c-cyan);
  margin-left: 2px;
}

.page-about .about-metric__label {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: rgba(244, 247, 251, 0.7);
}

/* ---------- 通用章节头 ---------- */

.page-about .about-journey,
.page-about .about-team,
.page-about .about-network,
.page-about .about-assurance,
.page-about .about-success,
.page-about .about-eco,
.page-about .about-close {
  padding: clamp(48px, 8vw, 96px) 0;
}

.page-about .about-head {
  max-width: 64ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-head h2 {
  font-size: var(--about-head-size);
  margin-top: 10px;
}

.page-about .about-head__sub {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(10, 18, 32, 0.68);
}

.page-about .about-head--light .about-head__sub {
  color: rgba(244, 247, 251, 0.74);
}

/* ---------- 发展阶段 ---------- */

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

.page-about .about-rail {
  position: sticky;
  top: var(--topbar-h);
  z-index: 4;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 0;
  background: linear-gradient(var(--c-cloud) 70%, rgba(244, 247, 251, 0.9));
  border-bottom: 1px solid var(--about-line);
  scrollbar-width: none;
}

.page-about .about-rail::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__node {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  background: #fff;
  color: var(--c-ink);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-rail__node:hover,
.page-about .about-rail__node:focus-visible {
  border-color: var(--c-signal);
  transform: translateY(-1px);
}

.page-about .about-rail__year {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-blue);
}

.page-about .about-rail__node em {
  font-style: normal;
  font-size: 12px;
  color: rgba(10, 18, 32, 0.6);
}

.page-about .about-stage {
  position: relative;
  padding: clamp(20px, 3.2vw, 34px) clamp(20px, 3.2vw, 34px) clamp(22px, 3.2vw, 32px);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 6px;
  background: #fff;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  scroll-margin-top: calc(var(--topbar-h) + 72px);
}

.page-about .about-stage + .about-stage {
  margin-top: clamp(16px, 2.6vw, 26px);
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: var(--accent, var(--c-blue));
}

.page-about .about-stage--blue {
  --accent: var(--c-blue);
}

.page-about .about-stage--indigo {
  --accent: var(--c-indigo);
}

.page-about .about-stage--teal {
  --accent: var(--c-teal);
}

.page-about .about-stage__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent, var(--c-blue));
}

.page-about .about-stage h3 {
  font-size: clamp(21px, 2.6vw, 27px);
  margin: 8px 0 0;
}

.page-about .about-stage p {
  margin-top: 12px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(10, 18, 32, 0.76);
  max-width: 62ch;
}

.page-about .about-stage__list {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.page-about .about-stage__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(10, 18, 32, 0.72);
}

.page-about .about-stage__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 9px;
  height: 2px;
  background: var(--accent, var(--c-blue));
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  background: linear-gradient(180deg, var(--c-cloud) 0%, #eaf0f7 100%);
}

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

.page-about .about-team__copy h2 {
  font-size: var(--about-head-size);
  margin-top: 10px;
}

.page-about .about-team__copy > p {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(10, 18, 32, 0.76);
  max-width: 58ch;
}

.page-about .about-team__roles {
  margin-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--about-line);
}

.page-about .about-team__roles li {
  display: grid;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-team__roles strong {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: -0.01em;
}

.page-about .about-team__roles span {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(10, 18, 32, 0.66);
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  background: var(--c-blue-ink);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 12 / 8;
  object-fit: cover;
}

.page-about .about-team__figure figcaption {
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: rgba(244, 247, 251, 0.78);
  background: var(--c-blue-ink);
}

.page-about .about-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 4vw, 40px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(244, 247, 251, 0.2);
}

.page-about .about-board__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 3vw, 28px);
  background: linear-gradient(150deg, var(--c-blue) 0%, var(--c-teal) 100%);
  color: var(--c-cloud);
}

.page-about .about-board__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.2vw, 44px);
  font-weight: 600;
  line-height: 1;
  color: var(--c-cyan);
}

.page-about .about-board__num em {
  font-style: normal;
  font-size: 0.5em;
  margin-left: 2px;
}

.page-about .about-board__label {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: rgba(244, 247, 251, 0.78);
}

/* ---------- 区域网络 ---------- */

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

.page-about .about-network__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.page-about .about-network__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-network__figure figcaption {
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-cloud);
  background: var(--c-blue-ink);
}

.page-about .about-network__copy h2 {
  font-size: var(--about-head-size);
  margin-top: 10px;
}

.page-about .about-network__copy p {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(10, 18, 32, 0.76);
  max-width: 56ch;
}

.page-about .about-network__sectors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .about-network__sectors li {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--c-mist);
  background: #fff;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--c-blue);
}

/* ---------- 质量与安全 ---------- */

.page-about .about-assurance {
  background:
    radial-gradient(100% 120% at 0% 0%, rgba(43, 30, 90, 0.95) 0%, rgba(43, 30, 90, 0) 62%),
    linear-gradient(160deg, var(--c-indigo) 0%, var(--c-blue-ink) 100%);
  color: var(--c-cloud);
}

.page-about .about-assurance .as-eyebrow--light {
  color: var(--c-cyan);
}

.page-about .about-badges {
  display: grid;
  gap: 12px;
  max-width: 900px;
}

.page-about .about-badge {
  border: 1px solid var(--c-line-light);
  border-radius: var(--radius);
  background: var(--c-glass);
  overflow: hidden;
}

.page-about .about-badge summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px clamp(16px, 2.4vw, 22px);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.1vw, 21px);
  letter-spacing: -0.01em;
  color: var(--c-cloud);
  list-style: none;
}

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

.page-about .about-badge summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--c-cyan);
}

.page-about .about-badge[open] summary::after {
  content: "−";
}

.page-about .about-badge summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: -2px;
}

.page-about .about-badge p {
  padding: 0 clamp(16px, 2.4vw, 22px) 18px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 247, 251, 0.8);
  max-width: 62ch;
}

/* ---------- 客户成功 ---------- */

.page-about .about-steps {
  display: grid;
  gap: clamp(16px, 2.6vw, 24px);
}

.page-about .about-steps__item {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--c-signal);
}

.page-about .about-steps__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-signal);
}

.page-about .about-steps__item h3 {
  font-size: clamp(20px, 2.4vw, 25px);
  margin: 8px 0 0;
}

.page-about .about-steps__item p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(10, 18, 32, 0.74);
}

/* ---------- 生态与认可 ---------- */

.page-about .about-eco__grid {
  display: grid;
  gap: clamp(16px, 2.6vw, 24px);
}

.page-about .about-eco__card {
  padding: clamp(24px, 3.6vw, 38px);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 6px;
  color: var(--c-cloud);
}

.page-about .about-eco__card--teal {
  background:
    radial-gradient(90% 100% at 100% 0%, rgba(43, 228, 208, 0.16) 0%, rgba(43, 228, 208, 0) 60%),
    linear-gradient(150deg, var(--c-teal) 0%, var(--c-blue-ink) 100%);
}

.page-about .about-eco__card--wine {
  background:
    radial-gradient(90% 100% at 0% 100%, rgba(255, 107, 44, 0.18) 0%, rgba(255, 107, 44, 0) 62%),
    linear-gradient(150deg, var(--c-wine) 0%, var(--c-indigo) 100%);
}

.page-about .about-eco__card h2,
.page-about .about-eco__card h3 {
  font-size: clamp(21px, 2.8vw, 30px);
  margin-top: 12px;
}

.page-about .about-eco__card p {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 247, 251, 0.82);
  max-width: 48ch;
}

/* ---------- 收束 ---------- */

.page-about .about-close__inner {
  display: grid;
  gap: 16px;
  padding: clamp(26px, 4vw, 44px);
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--about-line);
  border-left: 6px solid var(--c-signal);
  box-shadow: var(--shadow-soft);
}

.page-about .about-close__inner h2 {
  font-size: clamp(24px, 3.6vw, 36px);
  max-width: 22ch;
}

.page-about .about-close__inner p {
  font-size: 16px;
  line-height: 1.78;
  color: rgba(10, 18, 32, 0.72);
  max-width: 60ch;
}

.page-about .about-close__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

/* ---------- 响应式 ---------- */

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

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

@media (min-width: 900px) {
  .page-about .about-hero__split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }

  .page-about .about-journey__layout {
    grid-template-columns: 176px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 28px;
    flex-direction: column;
    gap: 10px;
    overflow: visible;
    padding: 0;
    background: none;
    border-bottom: 0;
  }

  .page-about .about-rail__node {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }

  .page-about .about-stage:nth-child(2) {
    margin-left: clamp(0px, 4vw, 56px);
  }

  .page-about .about-stage:nth-child(3) {
    margin-right: clamp(0px, 4vw, 56px);
  }

  .page-about .about-team__split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

  .page-about .about-network__layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: stretch;
  }

  .page-about .about-eco__card--wine {
    transform: translateY(28px);
  }
}
<<<END>>>