.page-about {
  --about-rail: 76px;
  --about-band: linear-gradient(96deg, rgba(29, 233, 255, 0.18) 0%, rgba(255, 212, 71, 0.1) 46%, rgba(255, 79, 163, 0.16) 100%);
  display: block;
}

.page-about .breadcrumb {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: 26px 0 48px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -12%;
  right: -18%;
  width: 64%;
  height: 76%;
  background: linear-gradient(140deg, rgba(29, 233, 255, 0.16), transparent 62%);
  clip-path: polygon(20% 0, 100% 0, 100% 78%, 0 100%);
  pointer-events: none;
}

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

.page-about .about-hero__tag {
  display: inline-block;
  margin: 0;
  padding: 6px 0;
  border-bottom: 1px solid rgba(29, 233, 255, 0.42);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  max-width: 15ch;
  font-family: var(--font-display);
  font-size: clamp(38px, 7.4vw, 78px);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--cyan);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .hero-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .hero-figure {
  padding: 16px 18px;
  background: var(--hull);
}

.page-about .hero-figure__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--yellow);
}

.page-about .hero-figure__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-hero__visual {
  position: relative;
  margin: 0;
  background: var(--hull);
  border: 1px solid rgba(29, 233, 255, 0.28);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  overflow: hidden;
}

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

.page-about .about-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 50%, rgba(5, 8, 16, 0.74) 100%),
    linear-gradient(96deg, rgba(29, 233, 255, 0.18), transparent 46%);
  pointer-events: none;
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(16, 28, 50, 0.85), rgba(5, 8, 16, 0));
}

.page-about .about-index__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  background: rgba(11, 19, 36, 0.72);
  color: var(--soft);
  font-size: 13px;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  opacity: 0.75;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  padding: 44px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 90px;
}

.page-about .about-chapter--lead {
  border-top: 0;
}

.page-about .chapter-rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-family: var(--font-mono);
}

.page-about .chapter-rail__num {
  padding-right: 10px;
  border-right: 1px solid rgba(29, 233, 255, 0.4);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .chapter-rail__kicker {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.page-about .chapter-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 500;
  line-height: 1.14;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .chapter-body p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 展览标签引用 ---------- */
.page-about .exhibit {
  margin: 26px 0 0;
  padding: 16px 20px;
  border-left: 2px solid var(--yellow);
  background: linear-gradient(90deg, rgba(255, 212, 71, 0.09), rgba(11, 19, 36, 0.6) 62%);
  color: var(--soft);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .exhibit__tag {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-about .exhibit blockquote {
  margin: 0;
}

/* ---------- 体验原则 ---------- */
.page-about .principle {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .principle:first-of-type {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .principle__num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
}

.page-about .principle__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 27px);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.3;
  color: var(--text);
}

.page-about .principle p {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 阶段色带 ---------- */
.page-about .about-band {
  margin: 26px 0 4px;
  padding: 15px 22px;
  background: var(--about-band);
  border-left: 3px solid var(--cyan);
  clip-path: polygon(0 0, 100% 0, calc(100% - 26px) 100%, 0 100%);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--soft);
}

/* ---------- 时间轴 ---------- */
.page-about .stage-list {
  margin: 22px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .stage {
  position: relative;
  padding-bottom: 30px;
}

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

.page-about .stage::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--hull);
  border: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: background 0.24s ease, box-shadow 0.24s ease;
}

.page-about .stage:hover::before,
.page-about .stage:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(29, 233, 255, 0.16);
}

.page-about .stage__phase {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-about .stage__title {
  margin: 7px 0 0;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-about .stage__desc {
  margin: 8px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 22px;
}

.page-about .role-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .role-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .role-list li:first-child {
  border-top: 1px solid var(--line);
}

.page-about .role-list b {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .team-visual,
.page-about .partner-visual {
  margin: 0;
  background: var(--hull);
  border: 1px solid var(--line);
}

.page-about .team-visual img,
.page-about .partner-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .team-visual figcaption,
.page-about .partner-visual figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

/* ---------- 合作 ---------- */
.page-about .partner-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 22px;
}

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

.page-about .partner-points li {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--magenta);
  background: var(--hull);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .chapter-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 滚动显现 ---------- */
.page-about [data-reveal].is-revealed {
  animation: about-rise 0.52s cubic-bezier(0.22, 0.7, 0.25, 1) both;
  animation-delay: calc(var(--i, 0) * 70ms);
}

@keyframes about-rise {
  from {
    opacity: 0.01;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .hero-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 40px;
    padding: 72px 0;
  }

  .page-about .chapter-rail {
    position: sticky;
    top: 96px;
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .page-about .chapter-rail__num {
    padding: 0 0 8px;
    border-right: 0;
    border-bottom: 1px solid rgba(29, 233, 255, 0.4);
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .partner-layout {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .principle {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 28px;
    padding: 32px 0;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 52px;
    padding: 44px 0 76px;
  }
}

@media (max-width: 520px) {
  .page-about .hero-figure {
    padding: 13px 14px;
  }

  .page-about .hero-figure__num {
    font-size: 20px;
  }

  .page-about .about-band {
    font-size: 10.5px;
    letter-spacing: 0.14em;
    padding: 13px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal].is-revealed {
    animation: none;
  }

  .page-about .stage::before,
  .page-about .about-index__list a {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --i: inherit;
}