.page-about .crumbs {
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-hero {
  margin-top: clamp(14px, 2.5vw, 26px);
}

.page-about .about-hero__frame {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5vw, 64px) clamp(20px, 4vw, 56px) clamp(26px, 4vw, 48px);
  border: 3px solid var(--line-strong);
  background:
    radial-gradient(120% 92% at 88% 0%, rgba(142, 99, 255, .22), transparent 62%),
    linear-gradient(180deg, rgba(63, 224, 200, .07), transparent 58%),
    var(--panel);
  box-shadow: var(--hard-shadow);
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 10px;
  background: repeating-linear-gradient(90deg, var(--champagne) 0 2px, transparent 2px 26px);
  opacity: .5;
  pointer-events: none;
}

.page-about .about-hero__kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-heading);
  font-size: clamp(30px, 5.4vw, 64px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  padding: 14px 16px;
  border: 2px solid var(--line);
  background: rgba(10, 14, 28, .55);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--champagne);
  letter-spacing: -0.01em;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--mist);
  letter-spacing: .02em;
}

/* ---------- 主体双栏 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(38px, 6vw, 76px);
}

.page-about .about-rail {
  display: none;
}

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

/* ---------- 章节 ---------- */

.page-about .about-chapter {
  position: relative;
  padding-top: clamp(30px, 4.5vw, 48px);
  border-top: 3px solid var(--line-strong);
  scroll-margin-top: calc(var(--header-h) + 26px);
}

.page-about .about-chapter + .about-chapter {
  margin-top: clamp(36px, 5.4vw, 64px);
}

.page-about .about-chapter::before {
  content: "";
  position: absolute;
  top: 7px;
  left: 0;
  width: 128px;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--cyan) 0 2px, transparent 2px 12px);
  opacity: .55;
  pointer-events: none;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 2vw, 26px);
}

.page-about .about-chapter__num {
  flex: 0 0 auto;
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(48px, 8.6vw, 104px);
  font-weight: 900;
  line-height: .78;
  letter-spacing: -0.04em;
  color: rgba(227, 195, 124, .24);
  -webkit-text-stroke: 2px rgba(227, 195, 124, .5);
}

.page-about .about-chapter__kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-chapter__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .about-chapter__meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .about-chapter__meta span::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--cyan);
  opacity: .65;
  flex: 0 0 auto;
}

.page-about .about-chapter__body {
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .about-chapter__body p {
  max-width: 66ch;
  margin: 0 0 1.1em;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.8;
  color: var(--text);
}

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

.page-about .about-chapter__body a {
  color: var(--champagne);
  text-decoration: none;
  border-bottom: 1px solid rgba(227, 195, 124, .5);
  transition: color .18s ease, border-color .18s ease;
}

.page-about .about-chapter__body a:hover,
.page-about .about-chapter__body a:focus-visible {
  color: var(--violet);
  border-color: var(--violet);
}

.page-about .about-figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
  border: 2px solid var(--line-strong);
  box-shadow: var(--hard-shadow-sm);
}

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

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 18px 20px 20px;
  border: 2px solid var(--line-strong);
  background: linear-gradient(150deg, rgba(142, 99, 255, .1), transparent 60%), var(--panel);
  box-shadow: var(--hard-shadow-sm);
  transition: border-color .18s ease, transform .18s ease;
}

.page-about .about-timeline__item:hover {
  border-color: var(--violet);
  transform: translateY(-2px);
}

.page-about .about-timeline__ver {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--void);
  background: var(--champagne);
}

.page-about .about-timeline__name {
  margin: 12px 0 8px;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-timeline__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 30px);
  align-items: start;
}

.page-about .about-team__text p {
  max-width: 62ch;
}

.page-about .about-team__figure {
  margin: 0;
  border: 2px solid var(--line-strong);
  box-shadow: var(--hard-shadow-sm);
}

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

/* ---------- 合作 ---------- */

.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-partner {
  padding: 18px 20px;
  border: 2px solid var(--line-cyan, var(--line));
  background: rgba(63, 224, 200, .06);
}

.page-about .about-partner__name {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .about-partner__num {
  margin: 8px 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-partner__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-honor {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 22px;
  padding: 20px 22px;
  border: 3px solid var(--champagne);
  background: linear-gradient(120deg, rgba(227, 195, 124, .14), transparent 68%), rgba(10, 14, 28, .5);
  box-shadow: var(--hard-shadow-sm);
}

.page-about .about-honor__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--champagne);
}

.page-about .about-honor__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

/* ---------- 收尾操作 ---------- */

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 34px);
}

/* ---------- 桌面 ---------- */

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

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

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

  .page-about .about-honor {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
}

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 206px) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }

  .page-about .about-toc .toc-list {
    display: grid;
    gap: 8px;
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
  }

  .page-about .about-toc .toc-link {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 7px 10px;
    font-size: 14px;
    color: var(--mist);
    text-decoration: none;
    border-left: 2px solid var(--line);
    transition: color .18s ease, border-color .18s ease, background-color .18s ease;
  }

  .page-about .about-toc .toc-link:hover,
  .page-about .about-toc .toc-link:focus-visible {
    color: var(--text);
    border-color: var(--violet);
    background: rgba(142, 99, 255, .09);
  }

  .page-about .about-toc .toc-link.is-active {
    color: var(--champagne);
    border-color: var(--champagne);
    background: rgba(227, 195, 124, .1);
  }

  .page-about .about-toc__num {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .04em;
    color: var(--cyan);
  }
}

@media (min-width: 1180px) {
  .page-about .about-chapter__head {
    gap: 30px;
  }
}
</PAGE_CSS>