.page-about {
  --ab-rule: rgba(75, 59, 122, .16);
  --ab-rule-dark: rgba(201, 196, 214, .22);
  --ab-ice-soft: rgba(127, 209, 232, .34);
  --ab-gap: clamp(26px, 4.4vw, 56px);
  color: var(--ink);
  overflow-wrap: break-word;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: clamp(16px, 2.6vw, 24px) 0 0;
  list-style: none;
  font-family: var(--font-numeric);
  font-size: .76rem;
  letter-spacing: .05em;
  color: var(--ink-mute);
}

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

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin: 0 .6em;
  color: var(--ice-deep);
  opacity: .8;
}

.page-about .breadcrumbs a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--plum);
  border-bottom-color: var(--ice-deep);
}

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

/* ---------- 标题与分节共用 ---------- */
.page-about .about-head {
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-head--tight {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-about .about-head__lead {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: clamp(.98rem, 1.5vw, 1.06rem);
  line-height: 1.82;
  color: var(--ink-soft);
}

.page-about .section-no {
  display: block;
  margin: 0 0 .18em;
  font-family: var(--font-numeric);
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  line-height: 1;
  letter-spacing: .02em;
  color: transparent;
  -webkit-text-stroke: 1.3px var(--ice-deep);
  opacity: .85;
}

.page-about h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  line-height: 1.26;
  letter-spacing: .02em;
  color: var(--plum-deep);
}

.page-about h3 {
  margin: 0 0 .5em;
  font-family: var(--font-editorial);
  font-weight: 700;
  font-size: clamp(1.08rem, 1.9vw, 1.28rem);
  line-height: 1.45;
  letter-spacing: .01em;
  color: var(--plum-deep);
}

.page-about .prose p {
  margin: 0 0 1.05em;
  font-family: var(--font-body);
  font-size: clamp(.98rem, 1.5vw, 1.04rem);
  line-height: 1.82;
  color: var(--ink-soft);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block-start: clamp(24px, 4vw, 48px);
}

.page-about .about-hero__grid {
  row-gap: clamp(28px, 4.4vw, 56px);
  align-items: start;
}

.page-about .about-hero__lead h1 {
  margin: .34em 0 0;
  max-width: 19ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 5.4vw, 3.3rem);
  line-height: 1.15;
  letter-spacing: .015em;
  color: var(--plum-deep);
}

.page-about .about-hero__lead h1::after {
  content: "";
  display: block;
  width: clamp(68px, 13vw, 128px);
  height: 3px;
  margin-top: clamp(16px, 2.4vw, 26px);
  background: linear-gradient(90deg, var(--gold), var(--ice));
  transform: skewX(-20deg);
}

.page-about .about-hero__intro {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 58ch;
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.6vw, 1.08rem);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__card {
  position: relative;
  padding: clamp(22px, 3.2vw, 34px);
  background:
    radial-gradient(circle at 84% 10%, rgba(127, 209, 232, .20), transparent 56%),
    radial-gradient(circle at 12% 90%, rgba(232, 183, 92, .14), transparent 54%),
    var(--night);
  color: var(--frost);
}

.page-about .about-hero__card .chip {
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-about .meta-list {
  margin: 0;
  display: grid;
}

.page-about .meta-list > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--ab-rule-dark);
}

.page-about .meta-list > div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .meta-key {
  font-family: var(--font-body);
  font-size: .84rem;
  letter-spacing: .06em;
  color: var(--dust);
}

.page-about .meta-value {
  margin: 0;
  font-family: var(--font-numeric);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--ice);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin__grid {
  row-gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-origin__body h2 {
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(20px, 2.8vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

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

.page-about .about-origin__figure figcaption,
.page-about .about-network figcaption,
.page-about .about-team__figure figcaption {
  margin-top: 14px;
  font-family: var(--font-body);
  font-size: .86rem;
  line-height: 1.7;
  color: var(--ink-mute);
  padding-left: 14px;
  border-left: 2px solid var(--ab-ice-soft);
}

/* ---------- 发展阶段 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
}

.page-about .about-stage {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: clamp(20px, 3vw, 30px);
  background: var(--frost);
  border-left: 3px solid var(--ice-deep);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  transition: transform .45s var(--ease), box-shadow .45s var(--ease);
}

.page-about .about-stage:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px -22px rgba(20, 27, 46, .55);
}

.page-about .about-stage--current {
  background: linear-gradient(120deg, rgba(232, 183, 92, .12), transparent 62%), var(--frost);
  border-left-color: var(--gold);
}

.page-about .about-stage__rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-numeric);
}

.page-about .about-stage__index {
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--ink-mute);
  text-transform: uppercase;
}

.page-about .about-stage__year {
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--plum);
}

.page-about .about-stage--current .about-stage__year {
  color: #a97a26;
}

.page-about .about-stage__body p {
  margin: 0;
  font-family: var(--font-body);
  font-size: .98rem;
  line-height: 1.82;
  color: var(--ink-soft);
}

/* 可展开说明 */
.page-about .about-more {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--ab-rule);
}

.page-about .about-more > summary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-numeric);
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--ice-deep);
  transition: color .25s var(--ease);
}

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

.page-about .about-more > summary::after {
  content: "＋";
  font-size: .92rem;
  line-height: 1;
  transition: transform .3s var(--ease), color .3s var(--ease);
}

.page-about .about-more[open] > summary::after {
  content: "＋";
  transform: rotate(45deg);
  color: var(--gold);
}

.page-about .about-more > summary:hover {
  color: var(--plum);
}

.page-about .about-more > summary:focus-visible {
  outline: 2px solid var(--ice);
  outline-offset: 3px;
}

.page-about .about-more__body {
  margin-top: 12px;
  padding-left: 14px;
  border-left: 2px solid var(--ab-ice-soft);
}

.page-about .about-more__body p {
  margin: 0;
  font-family: var(--font-body);
  font-size: .94rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 服务网络图 ---------- */
.page-about .about-network {
  margin: clamp(34px, 5vw, 64px) 0 0;
}

.page-about .about-network__frame {
  border: 1px solid var(--ab-rule);
}

/* ---------- 五道整理工序 ---------- */
.page-about .about-method {
  display: grid;
  gap: clamp(14px, 2.2vw, 20px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-method__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(14px, 2vw, 22px);
  padding: clamp(18px, 2.6vw, 28px);
  background: #fff;
  border: 1px solid var(--ab-rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: transform .4s var(--ease), border-color .3s var(--ease);
}

.page-about .about-method__item:hover {
  transform: translateY(-3px);
  border-color: rgba(62, 143, 168, .5);
}

.page-about .about-method__no {
  padding-top: 3px;
  min-width: 2.4ch;
  font-family: var(--font-numeric);
  font-size: clamp(1.3rem, 2.6vw, 1.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--plum);
}

.page-about .about-method__item:nth-child(even) .about-method__no {
  color: var(--ice-deep);
}

.page-about .about-method__item h3 {
  margin-bottom: .35em;
}

.page-about .about-method__item p {
  margin: 0;
  font-family: var(--font-body);
  font-size: .96rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  row-gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-team__intro h2 {
  margin-bottom: clamp(16px, 2.4vw, 22px);
}

.page-about .about-team__list {
  display: grid;
  gap: 14px;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__card {
  padding: clamp(18px, 2.4vw, 24px);
  background: var(--teal);
  color: var(--frost);
  clip-path: polygon(16px 0, 100% 0, 100% 100%, 0 100%, 0 16px);
}

.page-about .about-team__card h3 {
  margin-bottom: .4em;
  color: var(--ice);
}

.page-about .about-team__card p {
  margin: 0;
  font-family: var(--font-body);
  font-size: .94rem;
  line-height: 1.78;
  color: rgba(245, 243, 247, .82);
}

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

/* ---------- 资质徽标 ---------- */
.page-about .about-badges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: clamp(12px, 2vw, 18px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-badge {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--frost);
  border: 1px solid var(--ab-rule);
  border-top: 3px solid var(--plum);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  transition: transform .4s var(--ease), border-color .3s var(--ease), background .3s var(--ease);
}

.page-about .about-badge:hover,
.page-about .about-badge:focus-within {
  transform: translateY(-4px);
  border-color: var(--gold);
  background: #fff;
}

.page-about .about-badge--wide {
  border-top-color: var(--ice-deep);
}

.page-about .about-badge__mark {
  display: block;
  font-family: var(--font-numeric);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--plum);
}

.page-about .about-badge__note {
  display: block;
  margin-top: 10px;
  font-family: var(--font-body);
  font-size: .88rem;
  line-height: 1.72;
  color: var(--ink-mute);
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles__grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-principle {
  margin: 0;
  padding: clamp(20px, 3vw, 30px) clamp(20px, 3vw, 34px);
  border-left: 4px solid var(--wine);
  background: linear-gradient(102deg, rgba(122, 46, 74, .09), transparent 72%);
}

.page-about .about-principle p {
  margin: 0;
  font-family: var(--font-editorial);
  font-size: clamp(1.06rem, 2vw, 1.32rem);
  line-height: 1.72;
  color: var(--plum-deep);
}

.page-about .about-principles__items {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .about-principle__item {
  padding-bottom: clamp(14px, 2vw, 20px);
  border-bottom: 1px dashed var(--ab-rule);
}

.page-about .about-principle__item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-principle__item p {
  margin: 0;
  font-family: var(--font-body);
  font-size: .96rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-next {
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-next__card {
  display: block;
  padding: clamp(20px, 2.8vw, 28px);
  background: var(--plum);
  color: var(--frost);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  transition: transform .4s var(--ease), background .3s var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  background: var(--plum-deep);
  transform: translateY(-4px);
}

.page-about .about-next__tag {
  display: block;
  font-family: var(--font-numeric);
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-next__title {
  display: block;
  margin-top: 12px;
  font-family: var(--font-editorial);
  font-size: clamp(1.02rem, 1.8vw, 1.16rem);
  line-height: 1.55;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-stage {
    grid-template-columns: 168px 1fr;
    gap: clamp(20px, 3vw, 36px);
    align-items: start;
  }

  .page-about .about-stage__rail {
    display: block;
  }

  .page-about .about-stage__index {
    display: block;
    margin-bottom: 6px;
  }

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

@media (min-width: 900px) {
  .page-about .about-method__item:nth-child(odd) {
    margin-right: clamp(24px, 5vw, 84px);
  }

  .page-about .about-method__item:nth-child(even) {
    margin-left: clamp(24px, 5vw, 84px);
  }

  .page-about .about-principles__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }

  .page-about .about-team__list {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1100px) {
  .page-about .about-origin__grid {
    align-items: start;
  }

  .page-about .about-timeline {
    gap: clamp(20px, 2.4vw, 30px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage,
  .page-about .about-method__item,
  .page-about .about-badge,
  .page-about .about-next__card {
    transition: none;
  }
}
</PAGE_CSS>>>