.page-about {
  --about-rail: rgba(184, 196, 212, 0.18);
  --about-quiet: rgba(184, 196, 212, 0.72);
  overflow-x: hidden;
}

.page-about .about-intro {
  padding-top: clamp(1rem, 3vw, 2rem);
}

.page-about .about-kicker {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--aqua);
}

.page-about .about-masthead {
  position: relative;
  max-width: 56rem;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2rem) 0 clamp(1.5rem, 4vw, 2.75rem);
  text-align: center;
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.page-about .about-masthead h1 {
  margin: 0 0 1.35rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 4.2rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-about .about-h1-mark {
  display: inline-block;
  box-shadow: inset 0 -0.16em 0 rgba(201, 255, 59, 0.5);
}

.page-about .about-lead {
  max-width: 40rem;
  margin: 0 auto 1.5rem;
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.1rem);
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--about-quiet);
}

.page-about .about-meta li {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.page-about .about-meta li + li::before {
  content: "";
  width: 4px;
  height: 4px;
  transform: rotate(45deg);
  background: var(--ember);
}

.page-about .about-hero {
  margin: clamp(1.5rem, 4vw, 2.75rem) 0 0;
}

.page-about .about-hero__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--night-blue);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-lg)), calc(100% - var(--cut-lg)) 100%, 0 100%);
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 20, 38, 0.05) 40%, rgba(7, 20, 38, 0.82) 100%);
  pointer-events: none;
}

.page-about .about-hero__frame img,
.page-about .about-inline-media__frame img,
.page-about .about-side-media__frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-hero__caption {
  margin-top: 0.85rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--about-quiet);
}

.page-about .about-head {
  max-width: 46rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-head h2 {
  margin: 0.6rem 0 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.2vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-head__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-body {
  margin: 0 0 1.15rem;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-body--link a,
.page-about .about-note a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 255, 59, 0.42);
}

.page-about .about-body--link a:hover,
.page-about .about-note a:hover {
  color: var(--ember);
  border-bottom-color: var(--ember);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

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

/* ---------- 时间线 ---------- */
.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 1.6rem;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  bottom: 0.5rem;
  left: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--ember), var(--tactical) 48%, var(--lime));
  opacity: 0.85;
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(1.5rem, 3.5vw, 2.4rem);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  left: calc(-1.6rem + 1px - 0.3rem);
  width: 0.6rem;
  height: 0.6rem;
  transform: rotate(45deg);
  background: var(--ember);
}

.page-about .timeline__item--current::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(201, 255, 59, 0.16);
}

.page-about .timeline__year {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ember);
}

.page-about .timeline__item--current .timeline__year {
  color: var(--lime);
}

.page-about .timeline__title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.6vw, 1.28rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .timeline__item p {
  margin: 0;
  max-width: 34rem;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .timeline__chip {
  margin-top: 0.75rem;
}

/* ---------- 侧栏注释 ---------- */
.page-about .about-note {
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--lime);
  background: var(--glass);
  backdrop-filter: blur(6px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-note--left {
  border-left: 1px solid var(--line);
  border-top: 2px solid var(--ember);
}

.page-about .about-note__label {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--aqua);
}

.page-about .about-note__text {
  margin: 0 0 0.7rem;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-note__foot {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--about-quiet);
}

/* ---------- 图片 ---------- */
.page-about .about-inline-media,
.page-about .about-side-media {
  margin: 1.5rem 0;
}

.page-about .about-inline-media__frame,
.page-about .about-side-media__frame {
  position: relative;
  overflow: hidden;
  background: var(--night-blue);
  aspect-ratio: 4 / 3;
  clip-path: polygon(var(--cut-lg) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut-lg));
}

.page-about .about-inline-media figcaption,
.page-about .about-side-media figcaption {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--about-quiet);
}

/* ---------- 数字条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-stats li {
  padding: 1rem 0.9rem 1.1rem;
  background: var(--night-blue);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--silver);
}

/* ---------- 安徽区域 ---------- */
.page-about .about-region h2 {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.2vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--mist);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.65rem;
  margin: 1.25rem 0;
  padding: 0;
  list-style: none;
}

.page-about .about-facts li {
  padding: 0.7rem 0 0.7rem 1rem;
  border-left: 2px solid var(--tactical);
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-facts strong {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--amber);
  margin-right: 0.35rem;
}

/* ---------- 合作 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .about-partners__panel {
  padding: clamp(1.2rem, 3.5vw, 1.9rem);
  background: var(--night-blue);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-lg)), calc(100% - var(--cut-lg)) 100%, 0 100%);
}

.page-about .about-partners__panel--accent {
  background:
    radial-gradient(circle at 92% 8%, rgba(255, 90, 54, 0.16), transparent 58%),
    var(--night-blue);
  border-color: var(--line-live);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
}

.page-about .about-tags li {
  padding: 0.36rem 0.75rem;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--mist);
  border: 1px solid var(--line-live);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}

.page-about .about-award {
  margin: 0 0 1rem;
  padding: 0.85rem 1rem;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.65;
  color: var(--space-blue);
  background: linear-gradient(100deg, var(--lime), var(--aqua));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

/* ---------- 流程 ---------- */
.page-about .about-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-steps__item {
  padding: clamp(1.1rem, 3vw, 1.6rem);
  background: var(--space-blue);
}

.page-about .about-steps__num {
  display: block;
  margin-bottom: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ember);
}

.page-about .about-steps__item h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  padding: clamp(1.4rem, 4vw, 2.6rem);
  border: 1px solid var(--line-live);
  background:
    linear-gradient(135deg, rgba(201, 255, 59, 0.09), transparent 62%),
    var(--night-blue);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-lg)), calc(100% - var(--cut-lg)) 100%, 0 100%);
}

.page-about .about-cta h2 {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--mist);
}

.page-about .about-cta p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-inline-media__frame,
  .page-about .about-side-media__frame {
    aspect-ratio: 3 / 2;
  }
}

@media (min-width: 1024px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.8fr) minmax(0, 0.85fr);
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.8fr);
  }

  .page-about .about-note,
  .page-about .about-side-media {
    position: sticky;
    top: 6rem;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 1.25rem;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.6fr) auto;
    align-items: center;
  }

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