.page-about {
  --about-rule: rgba(11, 27, 51, .14);
  --about-rule-dark: rgba(247, 245, 240, .18);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--deep);
  color: var(--paper);
  padding: calc(var(--header-h) + 48px) 0 52px;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .34;
  z-index: -2;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 80% at 88% 6%, rgba(25, 227, 209, .24), transparent 62%),
    linear-gradient(180deg, rgba(5, 16, 31, .68) 0%, rgba(17, 42, 74, .92) 62%, var(--deep) 100%);
}

.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(247, 245, 240, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 245, 240, .07) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 82%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 82%);
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .about-hero .crumbs {
  margin-bottom: 26px;
  font-size: .8rem;
  color: var(--on-deep-dim);
}

.page-about .about-hero .crumbs a {
  color: var(--on-deep);
  text-decoration: none;
}

.page-about .about-hero .crumbs a:hover {
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  max-width: 15ch;
  font-size: clamp(2.4rem, 9.5vw, 5rem);
  font-weight: 800;
  font-style: italic;
  font-stretch: 105%;
  line-height: 1;
  letter-spacing: -.02em;
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 62ch;
  color: var(--on-deep);
  font-size: 1.02rem;
  line-height: 1.75;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 38px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--about-rule-dark);
  display: grid;
  gap: 20px;
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 6vw, 2.1rem);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -.01em;
}

.page-about .about-hero__stats li:nth-child(2) .about-hero__num {
  color: var(--orange);
}

.page-about .about-hero__label {
  display: block;
  margin-top: 6px;
  font-size: .84rem;
  line-height: 1.6;
  color: var(--on-deep-dim);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  gap: 36px;
  padding: 48px 0 72px;
}

.page-about .about-index {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-55);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: .92rem;
  color: var(--ink-55);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-about .about-index__list a:hover {
  color: var(--ink);
}

.page-about .about-index__list a[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-flow > * + * {
  margin-top: 52px;
}

.page-about .about-block {
  border-top: 1px solid var(--about-rule);
  padding-top: 32px;
}

.page-about .about-block h2 {
  margin: 0 0 18px;
  font-size: clamp(1.7rem, 6vw, 2.8rem);
  font-weight: 800;
  font-style: italic;
  font-stretch: 105%;
  line-height: 1.08;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-about .about-block__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-block__text {
  min-width: 0;
}

.page-about .about-block__text p {
  margin: 0 0 16px;
  line-height: 1.8;
}

.page-about .about-block__text a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .about-block__text a:hover {
  color: var(--deep);
  text-decoration-color: var(--orange);
}

.page-about .about-block__lede {
  margin: 0 0 24px;
  font-size: 1.05rem;
  color: var(--ink-70);
}

.page-about .about-note {
  border-left: 2px solid var(--cyan);
  padding: 2px 0 2px 16px;
  font-size: .86rem;
  line-height: 1.75;
  color: var(--ink-55);
}

.page-about .about-note strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--ink);
}

.page-about .about-note p {
  margin: 0;
}

/* ---------- 三层含义 ---------- */
.page-about .about-pace {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-pace__item {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-pace__no {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-pace__item:first-child .about-pace__no {
  color: var(--orange);
}

.page-about .about-pace__body h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-pace__body p {
  margin: 0;
  line-height: 1.8;
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
  margin-top: 52px;
  padding: 36px 22px 30px;
  background:
    radial-gradient(90% 70% at 8% 0%, rgba(25, 227, 209, .16), transparent 60%),
    var(--night);
  color: var(--paper);
}

.page-about .about-timeline h2 {
  margin: 12px 0 10px;
  font-size: clamp(1.7rem, 6vw, 2.8rem);
  font-weight: 800;
  font-style: italic;
  font-stretch: 105%;
  line-height: 1.08;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-about .about-timeline__lede {
  margin: 0;
  max-width: 52ch;
  font-size: .96rem;
  line-height: 1.75;
  color: var(--on-deep);
}

.page-about .about-track {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .about-track__item {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 20px 0 20px 24px;
  border-left: 1px solid var(--about-rule-dark);
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 28px;
  width: 9px;
  height: 9px;
  margin-left: -5px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-track__item:last-child::before {
  background: var(--orange);
}

.page-about .about-track__year {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 5vw, 1.9rem);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-track__body h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-track__item:last-child .about-track__body h3 {
  color: var(--orange);
}

.page-about .about-track__body p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--on-deep);
}

.page-about .about-timeline__media {
  margin: 28px 0 0;
}

.page-about .about-timeline__cap {
  margin-top: 10px;
  font-size: .8rem;
  color: var(--on-deep-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 24px;
}

.page-about .about-team__text p {
  margin: 0 0 16px;
  line-height: 1.8;
}

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

/* ---------- 服务方式 ---------- */
.page-about .about-creed {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-creed__item {
  background: var(--mint);
  border-left: 3px solid var(--cyan);
  padding: 18px 20px;
}

.page-about .about-creed__item:nth-child(2) {
  border-left-color: var(--orange);
}

.page-about .about-creed__item:nth-child(3) {
  border-left-color: var(--green);
}

.page-about .about-creed__item:nth-child(4) {
  border-left-color: var(--deep);
}

.page-about .about-creed__item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-creed__item p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--ink-70);
}

/* ---------- 服务地区与备案 ---------- */
.page-about .about-region {
  background:
    linear-gradient(120deg, rgba(25, 227, 209, .14), transparent 48%),
    var(--deep);
  color: var(--paper);
  padding: 34px 22px;
}

.page-about .about-region__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-region h2 {
  margin: 12px 0 14px;
  font-size: clamp(1.6rem, 5.6vw, 2.5rem);
  font-weight: 800;
  font-style: italic;
  font-stretch: 105%;
  line-height: 1.1;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-about .about-region__lead p {
  margin: 0 0 16px;
  max-width: 56ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--on-deep);
}

.page-about .about-region__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-region__facts {
  margin: 0;
  display: grid;
  gap: 16px;
  align-content: start;
  border-top: 1px solid var(--about-rule-dark);
  padding-top: 18px;
}

.page-about .about-region__facts dt {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--on-deep-dim);
}

.page-about .about-region__facts dd {
  margin: 6px 0 0;
  font-size: 1rem;
  color: var(--paper);
}

.page-about .about-region__mono {
  font-family: var(--font-mono);
  letter-spacing: .04em;
  color: var(--cyan);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 64px) 0 68px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }

  .page-about .about-timeline {
    padding: 44px 34px 36px;
  }

  .page-about .about-region {
    padding: 44px 34px;
  }

  .page-about .about-track__item {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    padding: 22px 0 22px 26px;
  }

  .page-about .about-creed {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .about-body {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: 60px;
    padding: 76px 0 96px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 11px;
  }

  .page-about .about-block__grid {
    grid-template-columns: minmax(0, 1fr) 226px;
    gap: 44px;
  }

  .page-about .about-pace__item {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a {
    transition: none;
  }
}
<<<END>>>