.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 4vw, 46px) 0 clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--ez-line);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(300px, 42%);
  height: 100%;
  background-image:
    linear-gradient(var(--ez-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ez-line) 1px, transparent 1px);
  background-size: 30px 30px;
  opacity: 0.45;
  pointer-events: none;
}

.page-about .about-hero > * {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .ez-eyebrow {
  margin: 0 0 14px;
  color: var(--ez-cyan);
}

.page-about .about-hero .ez-h1 {
  max-width: 18em;
  margin: 0;
}

.page-about .about-hero .ez-lede {
  max-width: 34em;
  margin: 18px 0 0;
  color: var(--ez-mist);
}

.page-about .about-facts {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  background: var(--ez-line);
  border: 1px solid var(--ez-line);
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px;
  background: var(--ez-ink-2);
}

.page-about .about-facts__num {
  font-family: var(--ez-font-mono);
  font-weight: 500;
  font-size: 28px;
  line-height: 1;
  color: var(--ez-cyan);
  letter-spacing: -0.02em;
}

.page-about .about-facts__label {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ez-mist);
}

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding-bottom: clamp(48px, 7vw, 88px);
}

/* 章节索引 */
.page-about .about-rail {
  padding: 24px 0 8px;
}

.page-about .about-rail__title {
  margin: 0 0 14px;
  font-family: var(--ez-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ez-mist);
}

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

.page-about .about-rail__list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid var(--ez-line);
  border-radius: var(--ez-radius);
  color: var(--ez-porcelain);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-about .about-rail__list .ez-num {
  color: var(--ez-cyan);
  font-size: 12px;
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  border-color: var(--ez-cyan-line);
  background: rgba(69, 224, 208, 0.06);
}

.page-about .about-rail__note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--ez-mist);
}

.page-about .about-rail__note a {
  color: var(--ez-amber);
  text-decoration: none;
  border-bottom: 1px solid var(--ez-amber-line);
}

.page-about .about-rail__note a:hover,
.page-about .about-rail__note a:focus-visible {
  border-bottom-color: var(--ez-amber);
}

/* 正文章节 */
.page-about .about-main {
  min-width: 0;
}

.page-about .about-sec {
  padding: clamp(28px, 4vw, 46px) 0;
  border-top: 1px solid var(--ez-line);
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .about-sec__num {
  flex: none;
  font-size: 13px;
  color: var(--ez-amber);
  letter-spacing: 0.08em;
}

.page-about .about-sec .ez-h2 {
  margin: 0;
}

.page-about .about-sec p {
  max-width: 34em;
  margin: 0 0 14px;
  line-height: 1.8;
}

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

/* 定位提示块 */
.page-about .about-callout {
  margin-top: 26px;
  padding: 20px;
  border: 1px solid var(--ez-line);
  border-left: 2px solid var(--ez-cyan);
  background: var(--ez-ink-3);
}

.page-about .about-callout__title {
  margin: 0 0 16px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ez-porcelain);
}

.page-about .about-callout__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-callout__cell p {
  margin: 10px 0 0;
  font-size: 14.5px;
  color: var(--ez-mist);
}

/* 内容方法 */
.page-about .about-intro {
  display: grid;
  gap: 22px;
  margin-bottom: 26px;
}

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--ez-line);
  border-radius: var(--ez-radius);
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ez-mist);
}

.page-about .about-board {
  display: grid;
  gap: 12px;
}

.page-about .about-board__card {
  padding: 20px;
  border: 1px solid var(--ez-line);
  border-radius: var(--ez-radius);
  background: var(--ez-ink-2);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-about .about-board__card:hover,
.page-about .about-board__card:focus-within {
  border-color: var(--ez-cyan-line);
  transform: translateY(-2px);
}

.page-about .about-board__card--indigo {
  background: var(--ez-indigo);
  border-color: rgba(69, 224, 208, 0.22);
}

.page-about .about-board__tag {
  margin: 0 0 12px;
  font-family: var(--ez-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ez-amber);
}

.page-about .about-board__tag--light {
  color: var(--ez-cyan);
}

.page-about .about-board__card .ez-h3 {
  margin: 0 0 10px;
}

.page-about .about-board__card p {
  margin: 0;
  max-width: none;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ez-mist);
}

.page-about .about-board__card--indigo p {
  color: rgba(244, 241, 232, 0.82);
}

.page-about .about-inline-link {
  margin-top: 20px;
  font-size: 14px;
  color: var(--ez-mist);
}

.page-about .about-inline-link a {
  color: var(--ez-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--ez-cyan-line);
  padding-bottom: 1px;
}

.page-about .about-inline-link a:hover,
.page-about .about-inline-link a:focus-visible {
  border-bottom-color: var(--ez-cyan);
}

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

.page-about .about-stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ez-line);
  border: 1px solid var(--ez-line);
}

.page-about .about-stats li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--ez-ink);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ez-mist);
}

.page-about .about-stats__num {
  flex: none;
  min-width: 3.4em;
  font-size: 22px;
  color: var(--ez-cyan);
}

.page-about .about-stats__num em {
  font-style: normal;
  font-size: 12px;
  margin-left: 2px;
  color: var(--ez-mist);
}

/* 里程碑 */
.page-about .about-sec--milestone {
  position: relative;
}

.page-about .about-banner {
  position: relative;
  margin: 0 0 24px;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(140px, 24vw, 210px);
  object-fit: cover;
  border: 1px solid var(--ez-line);
  border-radius: var(--ez-radius);
  filter: saturate(0.9);
}

.page-about .about-banner__cap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  margin: 0;
  max-width: none;
  padding: 4px 10px;
  font-family: var(--ez-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ez-porcelain);
  background: rgba(11, 29, 42, 0.78);
  border-left: 2px solid var(--ez-amber);
}

.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 2px 0 2px 22px;
  border-left: 1px solid var(--ez-line);
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 14px 0 14px 4px;
  outline: none;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 22px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ez-ink);
  border: 1px solid var(--ez-amber);
  box-shadow: 0 0 0 4px rgba(242, 180, 92, 0.09);
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-tl__item:hover::before,
.page-about .about-tl__item:focus-visible::before,
.page-about .about-tl__item:focus-within::before {
  background: var(--ez-amber);
  box-shadow: 0 0 0 5px rgba(242, 180, 92, 0.16);
}

.page-about .about-tl__year {
  font-size: 15px;
  color: var(--ez-amber);
  letter-spacing: 0.06em;
}

.page-about .about-tl__title {
  margin: 0;
  max-width: none;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ez-porcelain);
}

.page-about .about-tl__hint {
  max-width: 30em;
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ez-mist);
  transition: max-height 0.2s ease, opacity 0.2s ease, margin-top 0.2s ease;
}

.page-about .about-tl__item:hover .about-tl__hint,
.page-about .about-tl__item:focus .about-tl__hint,
.page-about .about-tl__item:focus-within .about-tl__hint {
  max-height: 9em;
  margin-top: 6px;
  opacity: 1;
}

/* 合作节奏 */
.page-about .about-flow__lede {
  margin-bottom: 22px;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ez-line);
  border: 1px solid var(--ez-line);
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 16px;
  background: var(--ez-ink-2);
  transition: background-color 0.18s ease;
}

.page-about .about-flow__step:hover {
  background: var(--ez-ink-3);
}

.page-about .about-flow__idx {
  font-size: 13px;
  color: var(--ez-cyan);
  padding-top: 4px;
}

.page-about .about-flow__step .ez-h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.page-about .about-flow__step p {
  margin: 0;
  max-width: 32em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ez-mist);
}

.page-about .about-cta {
  margin-top: 26px;
  padding: 22px;
  border: 1px solid var(--ez-line);
  border-top: 2px solid var(--ez-amber);
  background: var(--ez-ink-3);
}

.page-about .about-cta__text {
  margin: 0 0 18px;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ez-porcelain);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 平板 */
@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .about-board__card--indigo {
    grid-column: span 2;
  }

  .page-about .about-intro {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 26px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 26px;
  }

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

  .page-about .about-tl__item {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

/* 桌面：3:9 分栏与吸顶索引 */
@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--ez-hdr-h) + 28px);
    padding: 46px 0 8px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
  }

  .page-about .about-rail__list a {
    border: 0;
    border-left: 1px solid var(--ez-line);
    border-radius: 0;
    padding: 10px 0 10px 14px;
    background: none;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    border-left-color: var(--ez-cyan);
    background: none;
  }

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

  .page-about .about-board__card--indigo {
    grid-column: auto;
  }

  .page-about .about-sec {
    padding: clamp(34px, 3.4vw, 52px) 0;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stats li {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-board__card,
  .page-about .about-tl__item::before,
  .page-about .about-tl__hint,
  .page-about .about-flow__step,
  .page-about .about-rail__list a {
    transition: none;
  }

  .page-about .about-board__card:hover,
  .page-about .about-board__card:focus-within {
    transform: none;
  }
}
<<<END>>>