.page-about {
  --about-pad: clamp(22px, 3.2vw, 44px);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about a:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(44px, 7vw, 88px);
  background:
    radial-gradient(90% 120% at 88% 4%, rgba(56, 242, 208, .10), transparent 58%),
    linear-gradient(180deg, var(--navy) 0%, var(--ink) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(58%, 720px);
  background: linear-gradient(150deg, rgba(56, 242, 208, .08), rgba(16, 26, 43, 0) 66%);
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

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

.page-about .about-hero__crumb {
  margin-bottom: clamp(26px, 4vw, 52px);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-label);
  letter-spacing: .1em;
  color: var(--muted);
}

.page-about .breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  color: var(--line);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

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

.page-about .breadcrumb [aria-current="page"] {
  color: var(--paper);
}

.page-about .about-hero__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-size: var(--fs-label);
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-kicker__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(123, 216, 143, .14);
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 13em;
  font-size: var(--fs-h1);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.85;
  color: rgba(242, 234, 217, .82);
}

.page-about .about-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-link {
  display: inline-block;
  color: var(--cyan);
  font-size: var(--fs-sm);
  font-weight: 600;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(56, 242, 208, .38);
}

.page-about .about-link:hover {
  border-bottom-color: var(--cyan);
}

.page-about .about-hero__card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(27, 36, 51, .62);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .about-hero__card-label {
  margin: 0;
  color: var(--muted);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
  margin: 18px 0 0;
}

.page-about .about-stats__item dt {
  margin-bottom: 7px;
  font-size: var(--fs-label);
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .about-stats__item dd {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stats__unit {
  margin-left: 2px;
  font-size: .5em;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-hero__body {
    grid-template-columns: minmax(0, 1.28fr) minmax(270px, .72fr);
    align-items: end;
    gap: 56px;
  }
}

/* ---------- 主体两栏 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
  padding-top: clamp(34px, 6vw, 72px);
  padding-bottom: clamp(34px, 6vw, 72px);
}

.page-about .about-nav {
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.page-about .about-nav__title {
  display: none;
  margin: 0 0 14px;
  font-size: var(--fs-label);
  letter-spacing: .18em;
  color: var(--muted);
}

.page-about .about-nav__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-nav__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: var(--fs-label);
  letter-spacing: .04em;
  text-decoration: none;
  white-space: nowrap;
}

.page-about .about-nav__list a:hover,
.page-about .about-nav__list a:focus-visible {
  color: var(--paper);
  border-color: var(--teal);
}

.page-about .about-nav__list .num {
  font-size: 11px;
  color: var(--cyan);
  font-family: var(--font-num);
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-nav {
    position: sticky;
    top: 26px;
    border-bottom: 0;
    padding-bottom: 0;
  }

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

  .page-about .about-nav__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-about .about-nav__list a {
    border: 0;
    border-left: 1px solid var(--line);
    border-radius: 0;
    padding: 9px 0 9px 14px;
    font-size: var(--fs-sm);
    white-space: normal;
  }

  .page-about .about-nav__list a:hover,
  .page-about .about-nav__list a:focus-visible {
    border-left-color: var(--cyan);
    color: var(--cyan);
  }
}

/* ---------- 章节底座 ---------- */

.page-about .about-flow {
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
}

.page-about .about-sec {
  position: relative;
  padding: var(--about-pad);
  border-radius: var(--radius);
  color: var(--sec-body);
}

.page-about .about-sec--paper {
  background: var(--paper);
  --sec-title: var(--ink);
  --sec-body: #33404F;
  --sec-line: rgba(10, 14, 20, .14);
  --sec-accent: var(--teal);
}

.page-about .about-sec--dark {
  background: var(--navy);
  border: 1px solid var(--line);
  --sec-title: var(--paper);
  --sec-body: rgba(242, 234, 217, .82);
  --sec-line: var(--line);
  --sec-accent: var(--cyan);
}

.page-about .about-sec--region {
  background:
    radial-gradient(70% 130% at 92% 0%, rgba(56, 242, 208, .10), transparent 62%),
    var(--navy);
}

.page-about .chapter {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--sec-line);
}

.page-about .chapter__num {
  flex: none;
  font-family: var(--font-num);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--sec-accent);
}

.page-about .chapter__title {
  margin: 0;
  font-size: var(--fs-h2);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--sec-title);
}

.page-about .about-p {
  margin: 0 0 1em;
  max-width: 38em;
  font-size: var(--fs-body);
  line-height: 1.85;
}

.page-about .about-sec .about-p--lede {
  margin-bottom: 1.15em;
  font-size: clamp(16px, 1.2vw, 18px);
  line-height: 1.76;
  font-weight: 500;
  color: var(--sec-title);
}

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

.page-about .about-inline-link {
  color: var(--sec-accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .about-inline-link:hover {
  color: var(--sec-title);
}

/* ---------- 01 三点 ---------- */

.page-about .about-points {
  display: grid;
  gap: 0;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-points__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 5px;
  padding: 16px 0;
  border-top: 1px solid var(--sec-line);
}

.page-about .about-points .about-points__key {
  margin: 0;
  font-size: var(--fs-h4);
  font-weight: 800;
  letter-spacing: .06em;
  color: var(--sec-accent);
}

.page-about .about-points .about-points__text {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.78;
}

@media (min-width: 640px) {
  .page-about .about-points__item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

/* ---------- 02 时间线 ---------- */

.page-about .about-time {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-time__item {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 1px solid var(--sec-line);
}

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

.page-about .about-time__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 10px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(56, 242, 208, .12);
}

.page-about .about-time__item:last-child::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, .2);
}

.page-about .about-time__year {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-num);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .about-time__item:last-child .about-time__year {
  color: var(--orange);
}

.page-about .about-time__body h3 {
  margin: 0 0 6px;
  font-size: var(--fs-h4);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--sec-title);
}

.page-about .about-time__body p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
}

@media (min-width: 720px) {
  .page-about .about-time__item {
    padding-left: 30px;
  }
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: 0 0 24px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  filter: saturate(.86) contrast(1.03);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: var(--fs-label);
  letter-spacing: .04em;
  opacity: .78;
}

/* ---------- 03 团队 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__card {
  padding: 16px 14px;
  border: 1px solid var(--sec-line);
  border-radius: var(--radius);
  background: rgba(27, 36, 51, .05);
}

.page-about .about-team .about-team__num {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--sec-accent);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team .about-team__role {
  margin: 9px 0 7px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--sec-title);
}

.page-about .about-team .about-team__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
}

@media (min-width: 760px) {
  .page-about .about-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }
}

/* ---------- 04 / 05 / 06 分栏 ---------- */

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
}

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

.page-about .about-split__media {
  margin: 0;
  align-self: start;
}

.page-about .about-note {
  margin-top: 26px;
  padding-top: 16px;
  border-top: 1px solid var(--sec-line);
  font-size: var(--fs-sm);
  max-width: 46em;
}

@media (min-width: 880px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
}

/* ---------- 04 四步 ---------- */

.page-about .about-steps {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--sec-line);
}

.page-about .about-steps li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-steps .about-steps__num {
  padding-top: 3px;
  font-family: var(--font-num);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--sec-accent);
}

.page-about .about-steps li h3 {
  margin: 0 0 6px;
  font-size: var(--fs-body);
  font-weight: 700;
  color: var(--sec-title);
}

.page-about .about-steps li p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.78;
}

/* ---------- 05 新疆 ---------- */

.page-about .about-region {
  display: grid;
  gap: 0;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-region li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid var(--sec-line);
}

.page-about .about-region .about-region__key {
  margin: 0;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--sec-title);
}

.page-about .about-region .about-region__text {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.76;
}

@media (min-width: 560px) {
  .page-about .about-region li {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 16px;
  }
}

/* ---------- 06 合作与资质 ---------- */

.page-about .about-chips {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-chip {
  padding: 14px 16px;
  border: 1px solid var(--sec-line);
  border-left: 2px solid var(--sec-accent);
  border-radius: var(--radius);
  background: rgba(31, 168, 148, .07);
  transition: transform .18s ease, background-color .18s ease;
}

.page-about .about-chip:hover,
.page-about .about-chip:focus-visible {
  transform: translateX(2px);
  background: rgba(31, 168, 148, .14);
}

.page-about .about-chip .about-chip__title {
  margin: 0 0 6px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--sec-title);
}

.page-about .about-chip .about-chip__title .num {
  font-family: var(--font-num);
  color: var(--sec-accent);
}

.page-about .about-chip .about-chip__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.74;
}

.page-about .about-honors {
  display: grid;
  gap: 0;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-honors li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--sec-line);
}

.page-about .about-honors li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-honors .about-honors__year {
  padding-top: 2px;
  font-family: var(--font-num);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--sec-accent);
}

.page-about .about-honors h3 {
  margin: 0 0 5px;
  font-size: var(--fs-sm);
  font-weight: 700;
  line-height: 1.5;
  color: var(--sec-title);
}

.page-about .about-honors p {
  margin: 0;
  font-size: 13px;
  line-height: 1.74;
}

/* ---------- 回访引导 ---------- */

.page-about .about-return {
  padding: clamp(34px, 6vw, 68px) 0;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(70% 140% at 10% 0%, rgba(255, 138, 61, .12), transparent 62%),
    var(--navy);
}

.page-about .about-return__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-return__kicker {
  margin: 0 0 10px;
  font-size: var(--fs-label);
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .about-return__title {
  margin: 0;
  font-size: var(--fs-h3);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-return__text {
  margin: 12px 0 0;
  max-width: 42em;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(242, 234, 217, .78);
}

.page-about .about-return__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
}

.page-about .about-return__btn {
  display: inline-flex;
  align-items: center;
  padding: 13px 26px;
  border-radius: var(--radius);
  background: var(--orange);
  color: var(--ink);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: .02em;
  text-decoration: none;
  transition: transform .18s ease, background-color .18s ease;
}

.page-about .about-return__btn:hover {
  transform: translateY(-2px);
  background: #FFA163;
}

.page-about .about-return__btn:focus-visible {
  outline-color: var(--paper);
}

.page-about .about-return__alt {
  color: var(--paper);
  font-size: var(--fs-sm);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-return__alt:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

@media (min-width: 860px) {
  .page-about .about-return__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 48px;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
  }

  .page-about .about-chip:hover,
  .page-about .about-return__btn:hover {
    transform: none;
  }
}
<<<END>>>