.page-about {
  --about-gap: clamp(56px, 8vw, 112px);
  --about-soft: rgba(242, 196, 109, 0.10);
  background: var(--ink);
  color: var(--paper);
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: hidden;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 5vw, 56px) 0 clamp(40px, 6vw, 84px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -18%;
  width: min(720px, 108%);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at center, rgba(242, 196, 109, 0.20), rgba(242, 196, 109, 0) 64%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(184, 135, 62, 0.42), transparent);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-hero__lead h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 5vw, 3.4rem);
  line-height: 1.28;
  letter-spacing: 0.06em;
  margin: 14px 0 20px;
  color: var(--paper);
  text-shadow: 0 0 32px rgba(242, 196, 109, 0.22);
}

.page-about .about-hero__lead .lede {
  max-width: 36em;
  color: rgba(244, 235, 221, 0.86);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__board {
  position: relative;
  padding: 22px clamp(18px, 3vw, 26px) 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background:
    linear-gradient(160deg, rgba(22, 36, 59, 0.92), rgba(17, 28, 48, 0.78));
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, 0.9);
}

.page-about .about-hero__board::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(120% 80% at 100% 0%, var(--glow), transparent 62%);
  pointer-events: none;
}

.page-about .about-facts {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-faint);
  border-top: 1px solid var(--line-faint);
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-facts__item {
  background: rgba(11, 18, 32, 0.72);
  padding: 16px 12px 14px;
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .about-facts__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-hero__board-note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 235, 221, 0.72);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding-top: var(--about-gap);
}

.page-about .about-chapter__inner {
  display: grid;
  gap: 18px;
}

.page-about .about-no {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4.4vw, 2.8rem);
  line-height: 1;
  letter-spacing: 0.08em;
  color: rgba(242, 196, 109, 0.34);
}

.page-about .about-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  line-height: 1.36;
  letter-spacing: 0.06em;
  color: var(--paper);
  margin: 0 0 6px;
}

.page-about .about-title::after {
  content: "";
  display: block;
  width: 68px;
  height: 2px;
  margin-top: 14px;
  background: linear-gradient(90deg, var(--gold), rgba(224, 138, 60, 0.15));
}

.page-about .about-chapter--modules .about-title::after {
  width: 108px;
}

.page-about .about-chapter--rhythm .about-title::after {
  width: 88px;
}

.page-about .about-intro {
  max-width: 40em;
  margin: 14px 0 0;
  color: rgba(244, 235, 221, 0.8);
  line-height: 1.8;
}

.page-about .about-chapter__body p {
  line-height: 1.85;
  color: rgba(244, 235, 221, 0.84);
}

/* ---------- 01 起源 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .origin-copy p {
  margin: 0 0 16px;
  max-width: 40em;
}

.page-about .origin-quote {
  margin: 24px 0;
  padding: 18px 20px 16px 22px;
  border-left: 2px solid var(--amber);
  background: linear-gradient(90deg, rgba(224, 138, 60, 0.12), rgba(224, 138, 60, 0));
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .origin-quote blockquote {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.2vw, 1.18rem);
  line-height: 1.8;
  color: var(--paper);
  letter-spacing: 0.02em;
}

.page-about .origin-quote figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--celadon);
}

.page-about .origin-media {
  margin: 0;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

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

.page-about .origin-media figcaption {
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--line-faint);
}

/* ---------- 02 模块 ---------- */
.page-about .modules-map {
  margin: 26px 0 8px;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-2);
}

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

.page-about .modules-map figcaption {
  padding: 10px 16px;
  font-size: 12.5px;
  color: var(--mist);
  border-top: 1px solid var(--line-faint);
}

.page-about .module-switch {
  margin-top: 24px;
}

.page-about .module-switch__bar {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-about .module-switch__btn {
  display: grid;
  gap: 3px;
  padding: 14px 14px 13px;
  text-align: left;
  cursor: pointer;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-sm);
  background: rgba(22, 36, 59, 0.55);
  color: var(--paper);
  font-family: inherit;
  transition: border-color 200ms var(--ease), background 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .module-switch__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--celadon);
}

.page-about .module-switch__name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.12em;
  color: var(--paper);
}

.page-about .module-switch__hint {
  font-size: 12px;
  color: var(--mist);
}

.page-about .module-switch__btn[aria-selected="true"] {
  border-color: var(--line);
  background: linear-gradient(150deg, rgba(242, 196, 109, 0.16), rgba(22, 36, 59, 0.9));
  box-shadow: 0 0 0 1px rgba(242, 196, 109, 0.18), 0 12px 28px -22px rgba(242, 196, 109, 0.8);
}

.page-about .module-switch__btn:hover,
.page-about .module-switch__btn:focus-visible {
  border-color: var(--amber);
  box-shadow: 0 0 22px -8px rgba(242, 196, 109, 0.45);
}

.page-about .module-switch__panel {
  margin-top: 14px;
  padding: 20px clamp(16px, 3vw, 26px);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(111, 175, 159, 0.10), transparent 58%),
    rgba(17, 28, 48, 0.85);
}

.page-about .module-switch__panel + .module-switch__panel {
  margin-top: 12px;
}

.page-about .module-switch__panel[hidden] {
  display: none;
}

.page-about .module-switch__panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.06rem;
  letter-spacing: 0.05em;
  color: var(--gold);
}

.page-about .module-switch__panel p {
  margin: 0;
  max-width: 44em;
}

.page-about .module-switch__link {
  margin-top: 14px;
}

.page-about .module-switch__link a,
.page-about .rhythm-more a,
.page-about .ops-card__hint a {
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 175, 159, 0.45);
  padding-bottom: 1px;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .module-switch__link a:hover,
.page-about .rhythm-more a:hover,
.page-about .ops-card__hint a:hover {
  color: var(--gold);
  border-color: var(--gold);
}

/* ---------- 03 历程 ---------- */
.page-about .epoch-track {
  margin: 24px 0 4px;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(120deg, rgba(11, 18, 32, 0.95), rgba(22, 36, 59, 0.7));
}

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

.page-about .epoch-track figcaption {
  padding: 10px 16px;
  font-size: 12.5px;
  color: var(--mist);
  border-top: 1px solid var(--line-faint);
}

.page-about .epoch-switch {
  margin-top: 22px;
  position: relative;
  padding-left: 22px;
}

.page-about .epoch-switch::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(224, 138, 60, 0.4), rgba(111, 175, 159, 0.55));
}

.page-about .epoch-switch__bar {
  display: grid;
  gap: 6px;
}

.page-about .epoch-switch__btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: var(--mist);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: color 200ms var(--ease), background 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .epoch-switch__btn::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 50%;
  width: 9px;
  height: 9px;
  transform: translateY(-50%) rotate(45deg);
  background: var(--panel-2);
  border: 1px solid rgba(184, 135, 62, 0.55);
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .epoch-switch__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .epoch-switch__label {
  font-size: 14.5px;
  letter-spacing: 0.05em;
}

.page-about .epoch-switch__btn[aria-selected="true"] {
  color: var(--paper);
  border-color: var(--line-soft);
  background: rgba(242, 196, 109, 0.08);
}

.page-about .epoch-switch__btn[aria-selected="true"]::before {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 12px rgba(242, 196, 109, 0.7);
}

.page-about .epoch-switch__btn:hover,
.page-about .epoch-switch__btn:focus-visible {
  color: var(--paper);
  border-color: var(--line-faint);
}

.page-about .epoch-switch__panel {
  margin-top: 14px;
  padding: 18px clamp(16px, 3vw, 24px);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  background: rgba(17, 28, 48, 0.72);
}

.page-about .epoch-switch__panel[hidden] {
  display: none;
}

.page-about .epoch-switch__panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.04rem;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.page-about .epoch-switch__panel p {
  margin: 0;
  max-width: 44em;
}

/* ---------- 04 团队 ---------- */
.page-about .team-grid {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  background:
    linear-gradient(165deg, rgba(22, 36, 59, 0.9), rgba(11, 18, 32, 0.82));
  transition: border-color 220ms var(--ease), box-shadow 220ms var(--ease), transform 220ms var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within,
.page-about .team-card:focus {
  border-color: var(--line);
  box-shadow: 0 0 0 1px rgba(242, 196, 109, 0.16), 0 16px 34px -26px rgba(242, 196, 109, 0.85);
  transform: translateY(-3px);
  outline: none;
}

.page-about .team-card__tag {
  display: inline-block;
  margin-bottom: 12px;
}

.page-about .team-card__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: 0.06em;
  color: var(--paper);
}

.page-about .team-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(244, 235, 221, 0.68);
  transition: color 220ms var(--ease);
}

.page-about .team-card:hover .team-card__desc,
.page-about .team-card:focus .team-card__desc {
  color: rgba(244, 235, 221, 0.94);
}

.page-about .team-note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--celadon);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: linear-gradient(90deg, rgba(111, 175, 159, 0.10), transparent);
  font-size: 14px;
  color: rgba(244, 235, 221, 0.78);
}

/* ---------- 05 分类与节奏 ---------- */
.page-about .rhythm-grid {
  display: grid;
  gap: 20px;
  margin-top: 22px;
}

.page-about .rhythm-taxonomy,
.page-about .rhythm-timeline {
  padding: 20px clamp(16px, 3vw, 24px) 22px;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  background: rgba(17, 28, 48, 0.68);
}

.page-about .rhythm-taxonomy__big {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 2.9rem);
  line-height: 1.1;
  color: var(--gold);
  margin: 14px 0 10px;
  letter-spacing: 0.04em;
}

.page-about .rhythm-taxonomy__big span {
  color: rgba(242, 196, 109, 0.35);
  font-size: 0.66em;
  vertical-align: middle;
}

.page-about .rhythm-taxonomy__desc {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 235, 221, 0.78);
}

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

.page-about .rhythm-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .rhythm-list__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .rhythm-list__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .rhythm-list__when {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--celadon);
}

.page-about .rhythm-list__what h3 {
  margin: 2px 0 4px;
  font-family: var(--font-display);
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .rhythm-list__what p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .rhythm-more {
  margin: 18px 0 0;
  font-size: 14.5px;
  color: rgba(244, 235, 221, 0.74);
}

/* ---------- 06 运营信息 ---------- */
.page-about .ops-grid {
  display: grid;
  gap: 20px;
  margin-top: 22px;
}

.page-about .ops-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-faint);
}

.page-about .ops-row {
  display: grid;
  gap: 3px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .ops-row dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .ops-row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.page-about .ops-row dd a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 196, 109, 0.32);
}

.page-about .ops-row dd a:hover {
  border-color: var(--gold);
}

.page-about .ops-card {
  position: relative;
  padding: 22px clamp(18px, 3vw, 26px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 100% 0%, var(--glow), transparent 60%),
    rgba(22, 36, 59, 0.9);
}

.page-about .ops-card p {
  margin: 14px 0 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 235, 221, 0.82);
}

.page-about .ops-card .btn {
  display: inline-block;
}

.page-about .ops-card__hint {
  margin: 18px 0 0 !important;
  font-size: 13px !important;
  color: var(--mist) !important;
  line-height: 1.75;
}

/* ---------- 焦点可见 ---------- */
.page-about a:focus-visible,
.page-about button:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .module-switch__bar {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .rhythm-list__item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
  }

  .page-about .ops-row {
    grid-template-columns: 148px minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-about .about-chapter__inner {
    grid-template-columns: 118px minmax(0, 1fr);
    column-gap: clamp(20px, 4vw, 52px);
  }

  .page-about .about-no {
    position: sticky;
    top: calc(var(--topbar) + 28px);
    font-size: clamp(2rem, 3.6vw, 2.9rem);
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: start;
    gap: 34px;
  }

  .page-about .origin-media {
    margin-top: 54px;
  }

  .page-about .rhythm-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 22px;
  }

  .page-about .ops-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 26px;
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.78fr);
    align-items: start;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-hero__board {
    margin-top: 28px;
  }

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

  .page-about .epoch-switch {
    padding-left: 26px;
  }

  .page-about .epoch-switch__bar {
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    animation: none !important;
  }

  .page-about .team-card:hover,
  .page-about .team-card:focus {
    transform: none;
  }
}
<<<END>>>