.page-about {
  --about-gutter: 1.15rem;
  --about-max: 1220px;
  --about-read: 46rem;
  padding-bottom: 4.5rem;
}

.page-about .about-shell {
  width: 100%;
  max-width: var(--about-max);
  margin-inline: auto;
  padding-inline: var(--about-gutter);
}

/* 面包屑 */
.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 1.5rem 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-crumb a {
  color: var(--gold-light);
  text-decoration: none;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: 2rem;
  padding: 1rem 1.15rem 2rem;
  margin-bottom: 2.5rem;
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 90% at 90% 4%, rgba(31, 79, 168, 0.46), transparent 62%),
    radial-gradient(95% 75% at 2% 98%, rgba(200, 57, 43, 0.28), transparent 66%),
    linear-gradient(168deg, var(--ink-2), var(--ink-3));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.page-about .about-hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.1rem;
  min-width: 0;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 7.2vw, 3.9rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-about .about-hero-lead {
  margin: 0;
  max-width: 34rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr));
  gap: 1rem 1.25rem;
  width: 100%;
  margin: 0.35rem 0 0;
  padding: 1.15rem 0 0;
  list-style: none;
  border-top: 1px dashed var(--line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--gold-light);
}

.page-about .about-stat-label {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-hero-media {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

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

/* 正文骨架 */
.page-about .about-body {
  display: block;
  min-width: 0;
}

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

.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  min-width: 0;
}

/* 章节 */
.page-about .about-section {
  scroll-margin-top: 1.5rem;
  min-width: 0;
}

.page-about .about-section-head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding-bottom: 0.9rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-sec-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cinnabar-warm);
}

.page-about .about-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.6vw, 2.25rem);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--snow);
}

.page-about .prose {
  max-width: var(--about-read);
}

.page-about .prose p {
  margin: 0 0 1.05rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--snow);
}

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

.page-about .prose h3 {
  margin: 1.6rem 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gold-light);
}

/* 大号引文段 */
.page-about .about-pull {
  position: relative;
  max-width: var(--about-read);
  margin: 2rem 0 0;
  padding: 1.5rem 1.35rem 1.5rem 1.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 3.4vw, 1.5rem);
  font-weight: 700;
  line-height: 1.6;
  color: var(--gold-light);
  background:
    linear-gradient(140deg, rgba(31, 79, 168, 0.34), rgba(200, 57, 43, 0.18));
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  overflow: hidden;
}

.page-about .about-pull::after {
  content: "";
  position: absolute;
  right: -1.6rem;
  bottom: -1.9rem;
  width: 6.5rem;
  height: 6.5rem;
  border: 1px solid rgba(217, 164, 65, 0.32);
  border-radius: 6px;
  transform: rotate(45deg);
  pointer-events: none;
}

/* 标签 */
.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
  max-width: var(--about-read);
}

/* 图片 */
.page-about .about-figure {
  margin: 1.75rem 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  aspect-ratio: 4 / 3;
}

.page-about .about-figure--timeline {
  aspect-ratio: 3 / 2;
}

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

/* 团队 */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
  max-width: var(--about-read);
}

.page-about .about-team-card {
  position: relative;
  padding: 1.35rem 1.25rem 1.4rem;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--lapis);
  background: linear-gradient(168deg, var(--ink-2), rgba(8, 12, 30, 0.9));
  transition: border-color 240ms var(--ease), transform 240ms var(--ease);
}

.page-about .about-team-count {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-team-role {
  margin: 0.55rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-team-desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}

@media (hover: hover) {
  .page-about .about-team-card:hover {
    border-top-color: var(--cinnabar-warm);
    border-color: rgba(217, 164, 65, 0.4);
    transform: translateY(-3px);
  }
}

/* 四步流程 */
.page-about .about-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  max-width: var(--about-read);
  counter-reset: aboutstep;
}

.page-about .about-step {
  position: relative;
  padding: 1.15rem 1.15rem 1.2rem;
  border-radius: var(--r-md);
  border: 1px dashed rgba(217, 164, 65, 0.36);
  background: rgba(17, 23, 47, 0.72);
}

.page-about .about-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  margin-bottom: 0.6rem;
  border-radius: var(--r-pill);
  background: linear-gradient(140deg, var(--gold), var(--cinnabar-warm));
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
}

.page-about .about-step-title {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-step-text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist);
}

/* 色谱 */
.page-about .about-swatches {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
  max-width: var(--about-read);
}

.page-about .about-swatch {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 0.75rem;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: rgba(17, 23, 47, 0.7);
  min-width: 0;
}

.page-about .about-swatch-chip {
  display: block;
  height: 2.6rem;
  border-radius: 0.55rem;
  box-shadow: inset 0 0 0 1px rgba(245, 243, 234, 0.16);
}

.page-about .about-swatch--ink .about-swatch-chip { background: #0B1026; }
.page-about .about-swatch--lapis .about-swatch-chip { background: #1F4FA8; }
.page-about .about-swatch--cinnabar .about-swatch-chip { background: #C8392B; }
.page-about .about-swatch--gold .about-swatch-chip { background: #D9A441; }
.page-about .about-swatch--snow .about-swatch-chip { background: #F5F3EA; }
.page-about .about-swatch--mist .about-swatch-chip { background: #A9B0C6; }

.page-about .about-swatch-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-swatch-hex {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* 行内链接按钮 */
.page-about .about-inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* 时间线 */
.page-about .about-timeline {
  position: relative;
  margin: 1.75rem 0 0;
  padding: 0 0 0 1.6rem;
  list-style: none;
  max-width: var(--about-read);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.42rem;
  top: 0.6rem;
  bottom: 0.6rem;
  border-left: 1px dashed rgba(217, 164, 65, 0.55);
}

.page-about .about-tl-item {
  position: relative;
  padding-bottom: 1.7rem;
}

.page-about .about-tl-item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1.6rem - 4px);
  top: 0.42rem;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(217, 164, 65, 0.16);
}

.page-about .about-tl-year {
  display: block;
  margin-bottom: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cinnabar-warm);
}

.page-about .about-tl-body h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--snow);
}

.page-about .about-tl-body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--mist);
}

/* 结尾 CTA */
.page-about .about-cta {
  position: relative;
  padding: 1.7rem 1.35rem;
  border-radius: var(--r-lg);
  border: 1px solid rgba(217, 164, 65, 0.34);
  background:
    radial-gradient(110% 130% at 100% 0%, rgba(232, 90, 58, 0.3), transparent 60%),
    linear-gradient(150deg, rgba(31, 79, 168, 0.34), rgba(8, 12, 30, 0.94));
  overflow: hidden;
}

.page-about .about-cta h2 {
  margin: 0.4rem 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 4.4vw, 2rem);
  line-height: 1.3;
  color: var(--snow);
}

.page-about .about-cta-text {
  margin: 0;
  max-width: 32rem;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.35rem;
}

/* 平板 */
@media (min-width: 640px) {
  .page-about {
    --about-gutter: 1.75rem;
  }

  .page-about .about-hero {
    padding: 1.75rem 1.75rem 2.25rem;
  }

  .page-about .about-hero-lead {
    font-size: 1.06rem;
  }

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

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

  .page-about .about-cta {
    padding: 2.25rem 2rem;
  }
}

/* 桌面 */
@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 2.75rem;
    padding: 2.25rem 2.25rem 2.5rem;
  }

  .page-about .about-hero-media {
    aspect-ratio: 4 / 5;
  }

  .page-about .about-flow {
    gap: 3.75rem;
  }
}

@media (min-width: 1100px) {
  .page-about {
    --about-gutter: 2.25rem;
  }

  .page-about .about-body {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 1.5rem;
    align-self: start;
    padding-left: 0.25rem;
    border-left: 1px dashed rgba(217, 164, 65, 0.3);
  }

  .page-about .about-rail-kicker {
    margin: 0 0 0.9rem 0.9rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--gold);
  }

  .page-about .about-rail-list {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .page-about .about-rail-link {
    display: flex;
    align-items: baseline;
    gap: 0.55rem;
    padding: 0.42rem 0.6rem 0.42rem 0.9rem;
    border-radius: 0 var(--r-pill) var(--r-pill) 0;
    font-size: 0.86rem;
    line-height: 1.5;
    color: var(--mist);
    text-decoration: none;
    transition: color 200ms var(--ease), background-color 200ms var(--ease);
  }

  .page-about .about-rail-link .rail-num {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: rgba(217, 164, 65, 0.76);
  }

  .page-about .about-rail-link:hover,
  .page-about .about-rail-link:focus-visible {
    color: var(--snow);
    background: rgba(31, 79, 168, 0.26);
  }

  .page-about .about-flow {
    max-width: calc(var(--about-read) + 1rem);
  }

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

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

  .page-about .about-cta {
    padding: 2.6rem 2.4rem;
  }
}

@media (min-width: 1300px) {
  .page-about .about-body {
    grid-template-columns: 218px minmax(0, 1fr);
    gap: 3.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team-card,
  .page-about .about-rail-link {
    transition: none;
  }
}
<<<END>>>