.page-about {
  --about-rail: 6rem;
  --about-dot: 7px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

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

.page-about a {
  color: var(--jade);
}

/* ---------- 面包屑 ---------- */

.page-about .breadcrumb {
  padding: 1.25rem 0 .25rem;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .breadcrumb__list li {
  display: inline-flex;
  align-items: center;
}

.page-about .breadcrumb__list li + li::before {
  content: "/";
  margin: 0 .5rem 0 .15rem;
  color: var(--brass);
}

.page-about .breadcrumb__list a {
  color: var(--jade);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, color .2s ease;
}

.page-about .breadcrumb__list a:hover {
  color: var(--jade-deep);
  border-bottom-color: var(--brass);
}

.page-about .breadcrumb__list [aria-current="page"] {
  color: var(--clay-deep);
  font-weight: 700;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(2.25rem, 5vw, 4rem) 0 clamp(2rem, 4.5vw, 3.5rem);
  overflow: hidden;
}

.page-about .about-hero__wedge {
  position: absolute;
  top: -18%;
  right: -22%;
  width: min(760px, 68vw);
  height: 150%;
  background: linear-gradient(140deg, var(--clay) 0%, var(--clay-deep) 52%, var(--jade-deep) 100%);
  clip-path: polygon(42% 0, 100% 0, 100% 100%, 0 100%);
  opacity: .9;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__eyebrow {
  display: inline-block;
  margin: 0 0 1rem;
  padding: .2rem .7rem;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: .12em;
  color: var(--clay-deep);
  background: var(--brass-soft);
  border: 1px solid var(--brass);
}

.page-about .about-hero__title {
  max-width: 16ch;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h1);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 4.5rem;
  height: 4px;
  margin-top: 1.1rem;
  background: var(--brass);
}

.page-about .about-hero__lede {
  max-width: 56ch;
  margin: 1.35rem 0 0;
  font-size: 1.0625rem;
  color: var(--mist);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.75rem, 3.5vw, 2.75rem) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line-soft);
  border-top: 2px solid var(--clay);
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding: 1rem 1.1rem 1.15rem;
  background: var(--paper-lift);
}

.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.03em;
  color: var(--clay-deep);
}

.page-about .about-figure__unit {
  margin-left: .1rem;
  font-size: .72em;
  color: var(--clay);
}

.page-about .about-figure__label {
  font-size: var(--fs-note);
  letter-spacing: .05em;
  color: var(--mist);
}

/* ---------- 章节锚点条 ---------- */

.page-about .about-anchors {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  border-top: 1px solid var(--line-brass);
  border-bottom: 1px solid var(--line-brass);
}

.page-about .about-anchors ol {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem .35rem;
  margin: 0;
  padding: .7rem 0;
  list-style: none;
}

.page-about .about-anchors a {
  display: inline-block;
  padding: .3rem .75rem;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: .06em;
  color: var(--jade-deep);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}

.page-about .about-anchors a:hover {
  color: var(--clay-deep);
  background: var(--brass-soft);
  border-color: var(--brass);
}

/* ---------- 通用章节 ---------- */

.page-about .about-section {
  padding: clamp(2.5rem, 5.5vw, 4.5rem) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-section:last-of-type {
  border-bottom: none;
}

.page-about .about-section .section-head {
  max-width: 62ch;
}

.page-about .about-section .section-head__note {
  margin-top: .65rem;
  color: var(--mist);
}

/* ---------- 01 客户群体 ---------- */

.page-about .about-sectors {
  display: grid;
  gap: 1px;
  margin: clamp(1.75rem, 3.5vw, 2.5rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border-top: 2px solid var(--jade);
}

.page-about .about-sector {
  position: relative;
  padding: 1.15rem 1.25rem 1.4rem 1.6rem;
  background: var(--paper);
  transition: background-color .2s ease;
}

.page-about .about-sector::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--brass);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .2s ease;
}

.page-about .about-sector:hover {
  background: var(--clay-soft);
}

.page-about .about-sector:hover::before {
  transform: scaleY(1);
}

.page-about .about-sector__k {
  display: block;
  margin-bottom: .4rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.0625rem;
  letter-spacing: .05em;
  color: var(--jade-deep);
}

.page-about .about-sector p {
  margin: 0;
  font-size: .9375rem;
  color: var(--mist);
}

/* ---------- 02 发展历程 ---------- */

.page-about .about-photo {
  margin: clamp(1.75rem, 3.5vw, 2.5rem) 0 0;
}

.page-about .about-photo .media__inner {
  border: 1px solid var(--line-brass);
}

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

.page-about .about-track {
  display: grid;
  gap: 0;
  margin: clamp(1.75rem, 3.5vw, 2.5rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-track__item {
  position: relative;
  padding: 1.4rem 0 1.4rem 1.6rem;
  border-left: 1px solid var(--line-brass);
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-dot) / -2 - 1px);
  top: 1.95rem;
  width: var(--about-dot);
  height: var(--about-dot);
  border-radius: 50%;
  background: var(--brass);
  transition: transform .2s ease, background-color .2s ease;
}

.page-about .about-track__item:hover::before {
  transform: scale(1.35);
  background: var(--clay);
}

.page-about .about-track__item:last-child {
  padding-bottom: .5rem;
}

.page-about .about-track__year {
  display: inline-block;
  margin-bottom: .5rem;
  padding: .1rem .55rem;
  font-family: var(--font-mono);
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--jade-deep);
  background: var(--jade-soft);
  transition: background-color .2s ease, color .2s ease;
}

.page-about .about-track__item:hover .about-track__year {
  color: var(--clay-deep);
  background: var(--brass-soft);
}

.page-about .about-track__body h3 {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h3);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-track__body p {
  margin: 0;
  color: var(--mist);
}

/* ---------- 03 版本沿革 ---------- */

.page-about .about-versions {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  margin-top: clamp(1.75rem, 3.5vw, 2.5rem);
}

.page-about .about-versions__scale {
  margin: 0;
}

.page-about .about-versions__scale .media__inner {
  border: 1px solid var(--line-brass);
}

.page-about .about-versions__scale img {
  width: 100%;
  object-fit: cover;
  aspect-ratio: 10 / 14;
}

.page-about .about-axis {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--clay);
}

.page-about .about-axis__item {
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 1fr);
  gap: 0 1.1rem;
  padding: 1.35rem 0 1.5rem;
  border-bottom: 1px solid var(--line-soft);
  background-image: linear-gradient(90deg, var(--jade-soft) 0%, rgba(207, 230, 223, 0) 70%);
  background-repeat: no-repeat;
  background-size: 0% 100%;
  transition: background-size .25s ease;
}

.page-about .about-axis__item:hover {
  background-size: 100% 100%;
}

.page-about .about-axis__key {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.03em;
  color: var(--clay);
}

.page-about .about-axis__body h3 {
  margin: .2rem 0 .5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h3);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-axis__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-axis__body p:last-child {
  margin: 0;
  font-size: .9375rem;
  color: var(--mist);
}

.page-about .about-version-rule {
  margin-top: clamp(1.75rem, 3.5vw, 2.5rem);
  border-left: 3px solid var(--brass);
}

.page-about .about-version-rule__title {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.0625rem;
  letter-spacing: .03em;
  color: var(--clay-deep);
}

.page-about .about-version-rule p {
  margin: 0 0 .65rem;
  font-size: .9375rem;
  color: var(--mist);
}

.page-about .about-version-rule__sample {
  padding: .6rem .8rem;
  font-family: var(--font-mono);
  font-size: .875rem;
  color: var(--clay-deep) !important;
  background: var(--brass-soft);
  border: 1px dashed var(--brass);
}

.page-about .about-version-rule__more {
  margin-bottom: 0 !important;
}

/* ---------- 04 团队 ---------- */

.page-about .about-team {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  margin-top: clamp(1.75rem, 3.5vw, 2.5rem);
}

.page-about .about-team__text p {
  margin: 0 0 1rem;
  color: var(--mist);
}

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

.page-about .about-team__photo {
  margin: 0;
}

.page-about .about-team__photo .media__inner {
  border: 1px solid var(--line-brass);
}

.page-about .about-team__photo img {
  width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ---------- 05 资质与合作 ---------- */

.page-about .about-honors {
  display: grid;
  gap: 0;
  margin: clamp(1.75rem, 3.5vw, 2.5rem) 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--jade);
}

.page-about .about-honors li {
  display: grid;
  gap: .35rem;
  padding: 1.3rem 0 1.4rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-honors li h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h3);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-honors li p {
  margin: 0;
  font-size: .9375rem;
  color: var(--mist);
}

.page-about .about-honors__year {
  display: inline-block;
  width: fit-content;
  padding: .1rem .55rem;
  font-family: var(--font-mono);
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--jade-deep);
  background: var(--jade-soft);
}

.page-about .about-honors__foot {
  margin: 1.5rem 0 0;
  padding: .9rem 1.1rem;
  font-size: .9375rem;
  color: var(--clay-deep);
  background: var(--clay-soft);
  border-left: 3px solid var(--clay);
}

/* ---------- 06 服务网络 ---------- */

.page-about .about-network {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  margin-top: clamp(1.75rem, 3.5vw, 2.5rem);
}

.page-about .about-network__list {
  display: grid;
  gap: 0;
  margin: 0;
}

.page-about .about-network__list > div {
  display: grid;
  gap: .3rem;
  padding: 1rem 0 1.1rem;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-network__list > div:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-network__list dt {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .9375rem;
  letter-spacing: .04em;
  color: var(--clay-deep);
}

.page-about .about-network__list dd {
  margin: 0;
  font-size: .9375rem;
  color: var(--mist);
}

.page-about .about-network__note {
  margin: 0;
  border-left: 3px solid var(--brass);
}

.page-about .about-network__note p {
  margin: 0 0 .7rem;
  font-size: .9375rem;
  color: var(--mist);
}

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

/* ---------- 结尾 ---------- */

.page-about .about-close {
  position: relative;
  margin-top: clamp(2rem, 4vw, 3.5rem);
  padding: clamp(2rem, 4.5vw, 3.25rem) 0;
  background: var(--jade-deep);
  color: var(--paper);
}

.page-about .about-close::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--scan);
}

.page-about .about-close__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-close__title {
  max-width: 24ch;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h2);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-close__lede {
  max-width: 62ch;
  margin: 1rem 0 0;
  color: rgba(247, 242, 233, .82);
}

.page-about .about-close__lede a {
  color: var(--brass-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--brass);
  transition: color .2s ease, border-color .2s ease;
}

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

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin: 1.75rem 0 0;
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-sectors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-sectors > li:last-child {
    grid-column: 1 / -1;
  }

  .page-about .about-track__item {
    display: grid;
    grid-template-columns: minmax(120px, 168px) minmax(0, 1fr);
    gap: 0 1.75rem;
    padding-left: 2.25rem;
  }

  .page-about .about-track__year {
    margin-bottom: 0;
    width: fit-content;
  }

  .page-about .about-honors li {
    grid-template-columns: 6rem minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 0 1.75rem;
  }

  .page-about .about-honors__year {
    margin-top: .2rem;
  }

  .page-about .about-network__list > div {
    grid-template-columns: 9rem minmax(0, 1fr);
    gap: 0 1.5rem;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-versions {
    grid-template-columns: minmax(200px, 1fr) minmax(0, 2fr);
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-network {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-hero__lede {
    margin-top: 1.5rem;
  }
}

@media (min-width: 1100px) {
  .page-about .about-versions__scale {
    position: sticky;
    top: 96px;
  }
}
<<<END>>>