.page-about {
  --about-index-w: 232px;
  --about-gap: clamp(1.5rem, 3.5vw, 3.25rem);
  --about-line: var(--line-20);
  color: var(--fg);
  background:
    radial-gradient(90% 46% at 80% -6%, rgba(200, 255, 61, .10), transparent 62%),
    radial-gradient(70% 40% at 0% 10%, rgba(255, 122, 26, .07), transparent 60%);
  padding-bottom: clamp(2rem, 6vw, 4.5rem);
}

.page-about__crumbs {
  padding-top: clamp(.9rem, 2.5vw, 1.5rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.1rem, 3vw, 1.75rem) 0 clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -46%;
  width: 70%;
  height: 78%;
  background: radial-gradient(closest-side, rgba(255, 122, 26, .16), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: center;
}

.page-about .about-hero h1 {
  margin: .5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 3.4rem);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--mist-50);
  max-width: 15ch;
}

.page-about .about-hero .lead {
  margin: 1rem 0 0;
  max-width: 56ch;
  font-size: clamp(.95rem, 1.7vw, 1.05rem);
  line-height: 1.8;
  color: var(--mist-50);
  opacity: .84;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .75rem;
  margin: 1.5rem 0 0;
  padding: 1.1rem 0 0;
  border-top: 1px solid var(--about-line);
  list-style: none;
}

.page-about .about-hero__stats .kpi {
  display: flex;
  flex-direction: column;
  gap: .25rem;
}

.page-about .about-hero__stats .kpi__value {
  font-family: var(--font-num);
  font-size: clamp(1.6rem, 5vw, 2.25rem);
  line-height: 1;
  color: var(--lime-400);
  letter-spacing: -.02em;
}

.page-about .about-hero__stats .kpi__label {
  font-size: .76rem;
  line-height: 1.45;
  color: var(--fg-dim);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.5rem;
}

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

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 34%;
  background: linear-gradient(180deg, rgba(200, 255, 61, .16), transparent);
  mix-blend-mode: screen;
  animation: about-scan 6s linear infinite;
  pointer-events: none;
}

@keyframes about-scan {
  0% { transform: translateY(-40%); opacity: 0; }
  18% { opacity: .85; }
  82% { opacity: .85; }
  100% { transform: translateY(300%); opacity: 0; }
}

/* ---------- 通用媒体框 ---------- */
.page-about .media-frame {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(140deg, var(--moss-850), var(--ink-950));
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-frame__caption {
  padding: .6rem .85rem;
  font-size: .78rem;
  line-height: 1.5;
  color: var(--fg-dim);
  background: rgba(6, 18, 15, .62);
  border-top: 1px solid var(--about-line);
}

/* ---------- 主体：索引 + 长卷 ---------- */
.page-about .about-body {
  display: grid;
  gap: var(--about-gap);
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

.page-about .about-index {
  padding: .85rem 1rem;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: var(--glass-08);
  backdrop-filter: blur(8px);
}

.page-about .about-index__title {
  margin: 0 0 .6rem;
  font-family: var(--font-num);
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.page-about .about-index__list {
  display: flex;
  gap: .4rem;
  margin: 0;
  padding: 0 0 .15rem;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  padding: .4rem .6rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  font-size: .86rem;
  color: var(--fg-dim);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--lime-400);
  border-color: var(--about-line);
  background: var(--glass-08);
}

.page-about .about-index__no {
  font-family: var(--font-num);
  font-size: .7rem;
  color: var(--lime-400);
}

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

.page-about .about-section {
  padding: clamp(1.5rem, 4vw, 2.5rem) 0;
  border-top: 1px solid var(--about-line);
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

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

.page-about .about-section h2 {
  margin: .45rem 0 .85rem;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--mist-50);
}

.page-about .about-section__intro {
  margin: 0;
  max-width: 62ch;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--fg-dim);
}

.page-about .about-section__figure {
  margin: 1.5rem 0 1.75rem;
}

.page-about .about-section__foot {
  margin: 1.25rem 0 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--fg-dim);
}

.page-about .about-section__foot a,
.page-about .role-card__link,
.page-about .quality-item a {
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, .38);
}

.page-about .about-section__foot a:hover,
.page-about .role-card__link:hover,
.page-about .quality-item a:hover {
  border-bottom-color: var(--lime-400);
}

/* ---------- 分工卡片 ---------- */
.page-about .role-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .9rem;
  margin-top: 1.5rem;
}

.page-about .role-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .6rem;
  padding: 1.15rem 1.15rem 1.25rem;
  border-radius: var(--radius);
}

.page-about .role-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.06rem;
  line-height: 1.35;
  color: var(--mist-50);
}

.page-about .role-card p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--fg-dim);
}

.page-about .role-card__foot {
  font-size: .85rem !important;
}

.page-about .role-card__foot .num {
  font-family: var(--font-num);
  font-size: 1.02rem;
  color: var(--lime-400);
}

.page-about .role-card__link {
  font-size: .86rem;
  margin-top: auto;
  padding-top: .2rem;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 1.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime-400), var(--moss-600) 55%, transparent);
}

.page-about .tl-step {
  position: relative;
  padding-left: 3rem;
}

.page-about .tl-step__num {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--lime-400);
  border-radius: 50%;
  background: var(--ink-950);
  font-family: var(--font-num);
  font-size: .76rem;
  color: var(--lime-400);
}

.page-about .tl-step h3 {
  margin: .15rem 0 .35rem;
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.3;
  color: var(--mist-50);
}

.page-about .tl-step p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--fg-dim);
}

/* ---------- 版本折叠组 ---------- */
.page-about .ver-list {
  display: grid;
  gap: .55rem;
  margin-top: 1.5rem;
}

.page-about .ver {
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--about-line);
  border-radius: var(--radius-sm);
  background: var(--moss-900);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .ver[open] {
  border-left-color: var(--lime-400);
  background: var(--moss-850);
}

.page-about .ver__summary {
  display: flex;
  align-items: center;
  gap: .7rem;
  flex-wrap: wrap;
  padding: .85rem 1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .ver__summary:focus-visible {
  outline: 2px solid var(--lime-400);
  outline-offset: -2px;
}

.page-about .ver__tag {
  flex: none;
  padding: .1rem .5rem;
  border: 1px solid rgba(200, 255, 61, .34);
  border-radius: 999px;
  font-family: var(--font-num);
  font-size: .74rem;
  color: var(--lime-400);
}

.page-about .ver__name {
  flex: 1 1 12rem;
  font-size: .93rem;
  font-weight: 600;
  color: var(--mist-50);
}

.page-about .ver__chevron,
.page-about .checklist__chevron {
  flex: none;
  position: relative;
  width: 14px;
  height: 14px;
  transition: transform .2s var(--ease);
}

.page-about .ver__chevron::before,
.page-about .ver__chevron::after,
.page-about .checklist__chevron::before,
.page-about .checklist__chevron::after {
  content: "";
  position: absolute;
  background: var(--lime-400);
}

.page-about .ver__chevron::before,
.page-about .checklist__chevron::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-about .ver__chevron::after,
.page-about .checklist__chevron::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
  transition: opacity .2s var(--ease);
}

.page-about .ver[open] .ver__chevron,
.page-about .checklist[open] .checklist__chevron {
  transform: rotate(180deg);
}

.page-about .ver[open] .ver__chevron::after,
.page-about .checklist[open] .checklist__chevron::after {
  opacity: 0;
}

.page-about .ver__body {
  padding: 0 1rem 1rem;
}

.page-about .ver__body p {
  margin: 0;
  font-size: .89rem;
  line-height: 1.8;
  color: var(--fg-dim);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-pair {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--moss-900), var(--ink-950));
  overflow: hidden;
}

.page-about .partner-col {
  padding: 1.25rem 1.15rem;
}

.page-about .partner-col__value {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(2rem, 7vw, 2.8rem);
  line-height: 1;
  color: var(--lime-400);
  letter-spacing: -.03em;
}

.page-about .partner-col:last-child .partner-col__value {
  color: var(--orange-500);
}

.page-about .partner-col__label {
  margin: .4rem 0 .7rem;
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--mist-50);
}

.page-about .partner-col__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: var(--fg-dim);
}

/* ---------- 把关 ---------- */
.page-about .quality-list {
  display: grid;
  gap: 1.1rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: quality;
}

.page-about .quality-item {
  counter-increment: quality;
  padding: 1.1rem 1.15rem 1.2rem;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--moss-600);
  border-radius: var(--radius);
  background: var(--moss-900);
}

.page-about .quality-item h3 {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-size: 1.02rem;
  line-height: 1.35;
  color: var(--mist-50);
}

.page-about .quality-item h3::before {
  content: "0" counter(quality);
  display: inline-block;
  margin-right: .5rem;
  font-family: var(--font-num);
  font-size: .8rem;
  color: var(--orange-500);
  vertical-align: middle;
}

.page-about .quality-item > p,
.page-about .quality-item div > p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: var(--fg-dim);
}

.page-about .quality-item .num {
  font-family: var(--font-num);
  font-size: 1rem;
  color: var(--lime-400);
}

.page-about .quality-item--split {
  display: grid;
  gap: 1rem;
}

.page-about .quality-item__media {
  margin: 0;
}

.page-about .checklist {
  margin-top: .85rem;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-sm);
  background: var(--glass-08);
}

.page-about .checklist__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .6rem .85rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .checklist__summary:focus-visible {
  outline: 2px solid var(--lime-400);
  outline-offset: -2px;
}

.page-about .checklist__label {
  font-family: var(--font-num);
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--lime-400);
}

.page-about .checklist__items {
  display: grid;
  gap: .4rem;
  margin: 0;
  padding: .2rem .95rem 1rem 1.9rem;
  list-style: disc;
}

.page-about .checklist__items li {
  font-size: .86rem;
  line-height: 1.7;
  color: var(--fg-dim);
}

.page-about .checklist__items li::marker {
  color: var(--lime-400);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 1.15rem;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.35rem, 4vw, 2.35rem);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(28, 91, 69, .92), rgba(11, 33, 27, .94) 55%, rgba(6, 18, 15, .96));
  box-shadow: var(--shadow-1);
}

.page-about .about-cta h2 {
  margin: .4rem 0 .6rem;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  line-height: 1.2;
  color: var(--mist-50);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 54ch;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--mist-50);
  opacity: .84;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .role-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 1rem;
  }

  .page-about .role-card--wide {
    grid-column: span 4;
  }

  .page-about .role-card--narrow {
    grid-column: span 2;
  }

  .page-about .partner-pair {
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }

  .page-about .partner-col {
    padding: 1.6rem 1.5rem;
  }

  .page-about .partner-col + .partner-col {
    border-left: 1px dashed var(--about-line);
  }

  .page-about .quality-item--split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: end;
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
    align-items: end;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

  .page-about .about-timeline {
    gap: 1.35rem;
  }

  .page-about .tl-step {
    padding-left: 3.35rem;
  }
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
    padding: 1rem 1rem 1.1rem;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: .12rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    display: flex;
    width: 100%;
    white-space: normal;
    font-size: .88rem;
  }
}

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

  .page-about .about-hero__media::after {
    display: none;
  }
}
<<<PAGE_CSS_END>>>