.page-about {
  position: relative;
  background: var(--ink);
  color: var(--white);
  padding-bottom: 72px;
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(46, 36, 80, .55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46, 36, 80, .55) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .32;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, #000 0, transparent 1600px);
  mask-image: linear-gradient(to bottom, #000 0, transparent 1600px);
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  position: relative;
  z-index: 2;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 22px 20px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--blue);
}

.page-about .crumb-sep {
  margin: 0 8px;
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .story-hero {
  position: relative;
  overflow: hidden;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 30px 20px 42px;
}

.page-about .story-hero::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -120px;
  width: min(620px, 96vw);
  height: 360px;
  background: radial-gradient(closest-side, rgba(168, 85, 247, .34), rgba(56, 189, 248, .12) 58%, transparent 78%);
  transform: rotate(-8deg);
  pointer-events: none;
  z-index: 0;
}

.page-about .story-hero-inner {
  position: relative;
  z-index: 1;
}

.page-about .kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-about .story-title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.6vw, 74px);
  line-height: 1.02;
  letter-spacing: -.015em;
  text-shadow: 0 0 28px rgba(168, 85, 247, .45);
}

.page-about .lede {
  max-width: 60ch;
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--white);
}

.page-about .hero-stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 34px;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .stat-label {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 开篇满幅图 ---------- */
.page-about .story-banner {
  position: relative;
  z-index: 2;
  max-width: var(--wrap);
  margin: 0 auto 20px;
  padding: 0 20px;
}

.page-about .story-banner img {
  width: 100%;
  border: 1px solid var(--line);
}

/* ---------- 主栅格 ---------- */
.page-about .story-layout {
  position: relative;
  z-index: 2;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
}

.page-about .story-index {
  margin: 0 0 10px;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .index-label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--purple);
}

.page-about .index-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 0;
  padding: 0;
}

.page-about .index-link {
  display: inline-block;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .index-link:hover,
.page-about .index-link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--pink);
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding: 34px 0 10px;
  border-top: 1px solid var(--line);
}

.page-about .chapter:first-child {
  padding-top: 4px;
  border-top: none;
}

.page-about .chapter-kicker {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .chapter-kicker .num {
  color: var(--gold);
}

.page-about .chapter-title {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
  letter-spacing: .01em;
  color: var(--white);
}

.page-about .chapter p {
  max-width: 66ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--white);
}

.page-about .chapter p a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 189, 248, .4);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .chapter p a:hover,
.page-about .chapter p a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--pink);
}

.page-about .chapter-lede {
  color: var(--muted);
}

.page-about .drop-cap::first-letter {
  float: left;
  padding: 6px 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 58px;
  line-height: .84;
  color: var(--gold);
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--purple);
  box-shadow: 0 0 10px rgba(168, 85, 247, .85);
  transition: background .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .tl-item:hover::before {
  background: var(--pink);
  box-shadow: 0 0 14px rgba(255, 61, 154, .9);
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .tl-item--media::before {
  display: none;
}

.page-about .tl-item--media {
  padding-bottom: 24px;
}

.page-about .tl-item--media .media-frame {
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .tl-year {
  display: inline-block;
  margin-bottom: 6px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .tl-name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: .02em;
  color: var(--white);
}

.page-about .tl-desc {
  max-width: 56ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .tl-desc a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 189, 248, .4);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .team-shot {
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .role-list {
  list-style: none;
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .role-list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  column-gap: 14px;
  align-items: baseline;
  padding: 12px 14px;
  background: var(--ink-2);
  border-left: 2px solid var(--purple);
}

.page-about .role-num {
  grid-area: num;
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .role-name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  color: var(--white);
}

.page-about .role-desc {
  grid-area: desc;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 三件长期做的事 ---------- */
.page-about .line-stack {
  display: grid;
  gap: 14px;
  margin-top: 6px;
}

.page-about .line-card {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  transition: border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .line-card:hover {
  border-color: var(--purple);
  transform: translateY(-3px);
  box-shadow: 0 0 0 1px rgba(168, 85, 247, .35), 0 0 26px rgba(168, 85, 247, .22);
}

.page-about .line-num {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--pink);
}

.page-about .line-name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  color: var(--white);
}

.page-about .line-card p {
  max-width: 58ch;
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 服务范围 ---------- */
.page-about .city-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 22px;
  padding: 0;
}

.page-about .city-tags li {
  padding: 6px 11px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--blue);
  background: rgba(56, 189, 248, .06);
  border: 1px solid var(--line);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .city-tags li:hover {
  border-color: var(--blue);
  color: var(--white);
}

/* ---------- 下一步 ---------- */
.page-about .next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 16px;
}

.page-about .next-note {
  font-size: 14px;
  color: var(--muted);
}

.page-about .next-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 226, 196, .45);
}

.page-about .next-note a:hover,
.page-about .next-note a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--pink);
}

/* ---------- 断点 ---------- */
@media (min-width: 820px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .line-stack {
    gap: 16px;
  }

  .page-about .line-card:nth-child(2) {
    margin-left: 26px;
  }

  .page-about .line-card:nth-child(3) {
    margin-left: 52px;
  }

  .page-about .hero-stats {
    gap: 16px 48px;
  }
}

@media (min-width: 1000px) {
  .page-about .story-layout {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 64px;
    padding-top: 28px;
  }

  .page-about .story-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    height: max-content;
    margin: 0;
    padding: 4px 0 4px 18px;
    border-top: none;
    border-left: 1px solid var(--line);
  }

  .page-about .index-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 13px;
  }

  .page-about .chapter {
    padding: 44px 0 14px;
  }

  .page-about .chapter-title {
    margin-bottom: 22px;
  }

  .page-about .chapter p {
    font-size: 17px;
  }

  .page-about .tl-item {
    padding-bottom: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .index-link,
  .page-about .line-card,
  .page-about .tl-item::before,
  .page-about .city-tags li {
    transition: none;
  }
}