.page-about {
  --about-rail: 248px;
  --about-gap: clamp(28px, 4vw, 56px);
  --about-sec-gap: clamp(44px, 6vw, 76px);
  display: block;
  color: var(--paper);
}

.page-about .about-crumbs {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(20px, 3.5vw, 40px);
  padding-bottom: clamp(34px, 5vw, 56px);
}

.page-about .about-hero .eyebrow {
  margin: 0 0 18px;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 92%;
  font-size: clamp(2rem, 5.4vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-lead {
  margin: 0;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.9;
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-fact {
  position: relative;
  padding: 18px 16px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(24, 32, 81, 0.82), rgba(15, 22, 54, 0.5));
}

.page-about .about-fact::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}

.page-about .about-fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.6vw, 1.65rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan);
  line-height: 1.1;
}

.page-about .about-fact-label {
  display: block;
  margin-top: 8px;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- 双栏正文 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-about .about-toc-title {
  margin: 0 0 12px;
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-about .about-toc-list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-toc-list::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc-list li {
  flex: 0 0 auto;
}

.page-about .about-toc-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 15px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-size: 0.86rem;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-toc-list a .mono {
  color: var(--violet);
  font-size: 0.72rem;
}

.page-about .about-toc-list a:hover,
.page-about .about-toc-list a:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  outline: none;
}

.page-about .about-flow {
  min-width: 0;
  display: grid;
  gap: var(--about-sec-gap);
}

.page-about .about-sec {
  scroll-margin-top: 96px;
  min-width: 0;
}

.page-about .about-sec h2 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 94%;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-sec-num {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--violet);
  padding-top: 4px;
}

.page-about .about-sec p {
  margin: 0 0 16px;
  max-width: 66ch;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.92;
}

.page-about .about-note {
  margin-top: 20px;
  padding: 14px 18px;
  border-left: 2px solid var(--cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(61, 240, 214, 0.05);
  font-size: 0.9rem !important;
  color: var(--mist) !important;
  opacity: 1 !important;
}

/* ---------- 团队 ---------- */
.page-about .about-team-media {
  margin: 4px 0 24px;
}

.page-about .about-team-media .media-frame {
  width: 100%;
}

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

.page-about .about-team-media .media-caption {
  margin-top: 10px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-role {
  padding: 20px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(155deg, rgba(24, 32, 81, 0.9), rgba(15, 22, 54, 0.62));
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .about-role:hover {
  border-color: rgba(123, 92, 255, 0.7);
  transform: translateY(-2px);
}

.page-about .about-role-num {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-role h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-role p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
  opacity: 1;
}

/* ---------- 流程步骤 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-step details {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(24, 32, 81, 0.72);
  overflow: hidden;
  transition: border-color 0.24s var(--ease);
}

.page-about .about-step details[open] {
  border-color: rgba(61, 240, 214, 0.55);
  background: linear-gradient(160deg, rgba(24, 32, 81, 0.95), rgba(15, 22, 54, 0.7));
}

.page-about .about-step summary {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.page-about .about-step summary::-webkit-details-marker {
  display: none;
}

.page-about .about-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-step details[open] > summary::after {
  content: "–";
}

.page-about .about-step summary:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: -2px;
}

.page-about .about-step-num {
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--violet);
}

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

.page-about .about-step-body {
  padding: 0 18px 18px 18px;
}

.page-about .about-step-body p {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
  opacity: 1;
  max-width: none;
}

/* ---------- 时间线 ---------- */
.page-about .about-band {
  position: relative;
  margin-bottom: 26px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.78;
}

.page-about .about-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7, 11, 30, 0.85), rgba(7, 11, 30, 0.2) 60%, rgba(74, 47, 184, 0.35));
  pointer-events: none;
}

.page-about .about-time {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
  display: grid;
  gap: 22px;
}

.page-about .about-time::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--violet), var(--cyan) 55%, rgba(61, 240, 214, 0));
}

.page-about .about-time-item {
  position: relative;
  transition: transform 0.24s var(--ease);
}

.page-about .about-time-item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 3px rgba(61, 240, 214, 0.12);
}

.page-about .about-time-item:hover {
  transform: translateX(4px);
}

.page-about .about-time-year {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 6px;
}

.page-about .about-time-body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-time-body p {
  margin: 0;
  max-width: 58ch;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--mist);
  opacity: 1;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.page-about .about-partner {
  padding: 22px 20px;
  border-radius: var(--radius-lg);
}

.page-about .about-partner-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  color: var(--violet);
  margin-bottom: 12px;
}

.page-about .about-partner h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--mist);
  opacity: 1;
  max-width: none;
}

/* ---------- 支持路径 ---------- */
.page-about .about-paths {
  list-style: none;
  margin: 22px 0 18px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-paths li {
  padding: 20px 18px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--orange);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(24, 32, 81, 0.55);
}

.page-about .about-paths h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-paths p {
  margin: 0 0 14px;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--mist);
  opacity: 1;
  max-width: none;
}

.page-about .about-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 240, 214, 0.4);
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--paper);
  border-color: var(--paper);
  outline: none;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  margin-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: clamp(26px, 4vw, 46px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 120% at 0% 0%, rgba(74, 47, 184, 0.55), transparent 58%),
    radial-gradient(90% 120% at 100% 100%, rgba(61, 240, 214, 0.18), transparent 55%),
    linear-gradient(160deg, rgba(24, 32, 81, 0.95), rgba(7, 11, 30, 0.95));
  box-shadow: var(--shadow-panel);
}

.page-about .about-cta-text h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 94%;
  font-size: clamp(1.4rem, 3vw, 1.95rem);
  line-height: 1.24;
  color: var(--paper);
}

.page-about .about-cta-text p {
  margin: 0 0 22px;
  max-width: 52ch;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta-media {
  margin: 0;
  min-width: 0;
}

.page-about .about-cta-media .media-frame {
  width: 100%;
}

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

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 104px;
    border-left: 1px solid var(--line-soft);
    padding-left: 20px;
    align-self: start;
  }

  .page-about .about-toc-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-toc-list li + li {
    margin-top: 2px;
  }

  .page-about .about-toc-list a {
    display: flex;
    align-items: baseline;
    gap: 10px;
    width: 100%;
    min-height: 0;
    padding: 8px 0;
    border: 0;
    border-radius: 0;
    white-space: normal;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--mist);
  }

  .page-about .about-toc-list a:hover,
  .page-about .about-toc-list a:focus-visible {
    color: var(--cyan);
    border-color: transparent;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(24px, 4vw, 48px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-time-item,
  .page-about .about-toc-list a,
  .page-about .about-link,
  .page-about .about-step details {
    transition: none;
  }

  .page-about .about-role:hover,
  .page-about .about-time-item:hover {
    transform: none;
  }
}
<<<END>>>