.page-about {
  --about-hair: rgba(55, 242, 212, 0.24);
  --about-ghost-num: rgba(55, 242, 212, 0.2);
  background: var(--ink-void);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
  padding-bottom: 3rem;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding: 1.5rem 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--text-mute);
}

.page-about .breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur), border-color var(--dur);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--about-hair);
}

.page-about .breadcrumb__sep {
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 2rem 0 2.5rem;
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(70% 80% at 88% 0%, rgba(55, 242, 212, 0.09), transparent 62%),
    radial-gradient(50% 60% at 0% 100%, rgba(178, 124, 255, 0.07), transparent 70%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

.page-about .about-hero__text {
  position: relative;
  padding-left: 1.1rem;
  border-left: 1px solid var(--line);
  min-width: 0;
}

.page-about .about-hero__text::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  width: 1px;
  height: 3.5rem;
  background: var(--cyan);
}

.page-about .about-hero__text .display {
  margin: 0.7rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.15rem, 7.4vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
}

.page-about .about-hero__text .lede {
  margin: 0;
  max-width: 40ch;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-hero__stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem 1rem;
  margin: 2rem 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 4.6vw, 2.3rem);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 0.45rem;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-mute);
  letter-spacing: 0.04em;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.page-about .about-hero__media::before,
.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
  pointer-events: none;
}

.page-about .about-hero__media::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__media::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.page-about .about-hero__media .media__caption {
  display: block;
  margin-top: 0.6rem;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--text-mute);
}

/* ---------- 档案索引 ---------- */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.6rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-index__item {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--dur);
}

.page-about .about-index__item .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-mute);
}

.page-about .about-index__item:hover,
.page-about .about-index__item:focus-visible {
  color: var(--cyan);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding: 2.75rem 0;
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: 6rem;
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.6rem;
}

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

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  font-weight: 600;
  line-height: 0.88;
  letter-spacing: -0.04em;
  color: var(--about-ghost-num);
  font-variant-numeric: tabular-nums;
}

.page-about .about-chapter__side .headline {
  margin: 0.7rem 0 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-chapter__side .note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-mute);
}

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

.page-about .about-chapter__body > p {
  margin: 0 0 1rem;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

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

/* ---------- 标签页 ---------- */
.page-about .tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.4rem;
}

.page-about .tabs__btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 0.58rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 27, 51, 0.65);
  color: var(--text-dim);
  cursor: pointer;
  transition: background var(--dur), color var(--dur), border-color var(--dur);
}

.page-about .tabs__btn:hover {
  border-color: var(--about-hair);
  color: var(--text);
}

.page-about .tabs__btn[aria-selected="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-void);
}

.page-about .tabs__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .tabs__panel {
  border-left: 2px solid var(--line);
  padding: 0.15rem 0 0.15rem 1.1rem;
}

.page-about .tabs__panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-chapter__stage {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .about-chapter__figure {
  margin: 1.75rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-chapter__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-chapter__figure .media__caption {
  display: block;
  margin-top: 0.6rem;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--text-mute);
}

/* ---------- 团队角色卡 ---------- */
.page-about .role-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
}

.page-about .role-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-hull);
  transition: border-color var(--dur), background var(--dur);
}

.page-about .role-card[open] {
  border-color: var(--about-hair);
  background: linear-gradient(180deg, rgba(18, 41, 74, 0.85), rgba(11, 27, 51, 0.92));
}

.page-about .role-card__summary {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.95rem 1.05rem;
  cursor: pointer;
  list-style: none;
}

.page-about .role-card__summary::-webkit-details-marker {
  display: none;
}

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

.page-about .role-card[open] .role-card__summary::after {
  content: "−";
}

.page-about .role-card__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .role-card__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-mute);
}

.page-about .role-card__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .role-card__body {
  margin: 0;
  padding: 0 1.05rem 1.05rem;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 内容更新工序 ---------- */
.page-about .about-pipeline {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.5rem;
  margin: 1.25rem 0 1.5rem;
  padding: 0;
}

.page-about .about-pipeline__step {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 0.9rem;
  border-left: 2px solid var(--cyan);
  background: rgba(18, 41, 74, 0.55);
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--text-dim);
}

.page-about .about-pipeline__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

/* ---------- 覆盖数据 ---------- */
.page-about .about-coverage {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 0;
}

.page-about .about-coverage__item {
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--line);
  border-top: 2px solid rgba(55, 242, 212, 0.45);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 41, 74, 0.6), rgba(5, 10, 22, 0.25));
}

.page-about .about-coverage__item dt {
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--text-mute);
}

.page-about .about-coverage__item dd {
  margin: 0.45rem 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3.4vw, 1.7rem);
  font-weight: 600;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-about .about-scenes {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
  margin: 1.5rem 0 0;
  padding: 0;
}

.page-about .about-scenes li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 0.65rem;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-coverage__figure {
  margin: 1.75rem 0 0;
}

.page-about .about-coverage__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-coverage__figure .media__caption {
  display: block;
  margin-top: 0.6rem;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--text-mute);
}

/* ---------- 体验原则 ---------- */
.page-about .about-principles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .principle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem 1rem;
  padding: 1.05rem 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .principle:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .principle__num {
  padding-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .principle__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .principle p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--text-dim);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: 2.75rem 0 0;
  background: linear-gradient(180deg, transparent, rgba(11, 27, 51, 0.85));
}

.page-about .about-cta__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.6rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.page-about .about-cta__grid .headline {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.8vw, 1.9rem);
  line-height: 1.2;
  color: var(--text);
}

.page-about .about-cta__grid p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

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

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

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

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

  .page-about .about-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem 1.4rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 3rem 0 3.5rem;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 3.5rem;
    align-items: end;
  }

  .page-about .about-chapter {
    padding: 3.75rem 0;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 3.5rem;
  }

  .page-about .about-chapter__side {
    position: sticky;
    top: 6rem;
    align-self: start;
  }

  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
    padding: 2.1rem 2rem;
  }

  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .breadcrumb a,
  .page-about .about-index__item,
  .page-about .tabs__btn,
  .page-about .role-card {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>