.page-about {
  padding-top: 0;
  background: var(--deep);
  color: var(--cream);
  font-family: var(--font-body);
  position: relative;
}

/* ---------- 首章 ---------- */
.page-about .about-lede {
  position: relative;
  padding: 26px 0 clamp(40px, 6vw, 72px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(217, 164, 65, 0.22), transparent 62%),
    radial-gradient(90% 80% at 5% 100%, rgba(242, 107, 78, 0.16), transparent 66%);
  overflow: hidden;
}

.page-about .about-lede::after {
  content: "";
  position: absolute;
  inset: auto -20% 8% -20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(217, 164, 65, 0.55), transparent);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: clamp(20px, 3vw, 32px);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: rgba(246, 241, 231, 0.6);
}

.page-about .breadcrumb__link {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 164, 65, 0.5);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  border-bottom-color: var(--gold);
  color: var(--cream);
}

.page-about .about-crumb__sep {
  color: rgba(246, 241, 231, 0.35);
}

.page-about .about-lede__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-lede__figure {
  order: 2;
  margin: 0;
}

.page-about .about-lede__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 3px solid var(--gold);
  box-shadow: 14px 14px 0 rgba(217, 164, 65, 0.18);
}

.page-about .about-lede__copy {
  order: 1;
}

.page-about .about-coord {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--coral);
}

.page-about .about-lede h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-about .about-lede__text {
  max-width: 40ch;
  margin: 0 0 16px;
  font-size: clamp(0.96rem, 2.4vw, 1.06rem);
  line-height: 1.9;
  color: rgba(246, 241, 231, 0.84);
}

.page-about .about-facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid rgba(246, 241, 231, 0.22);
}

.page-about .about-facts li {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--sage);
}

.page-about .about-facts__num {
  color: var(--gold);
  font-weight: 700;
  margin-right: 0.45em;
}

/* ---------- 长卷骨架 ---------- */
.page-about .about-scroll {
  display: grid;
  gap: 0;
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 章节索引 ---------- */
.page-about .about-toc {
  position: sticky;
  top: var(--header-h);
  z-index: 5;
  margin-bottom: 22px;
  padding: 10px 0 6px;
  background: var(--deep);
  border-bottom: 2px solid rgba(217, 164, 65, 0.45);
}

.page-about .about-toc__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--sage);
}

.page-about .about-toc__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc__item {
  flex: 0 0 auto;
}

.page-about .about-toc__link {
  display: block;
  padding: 6px 12px;
  border: 2px solid rgba(246, 241, 231, 0.28);
  color: rgba(246, 241, 231, 0.82);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .about-toc__link[aria-current="true"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--deep);
  font-weight: 700;
}

/* ---------- 章节卡片 ---------- */
.page-about .about-chapter {
  position: relative;
  background: var(--cream);
  color: var(--ink);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-hard);
  padding: clamp(26px, 5vw, 48px) clamp(18px, 4vw, 44px);
  margin-bottom: clamp(26px, 5vw, 52px);
  scroll-margin-top: calc(var(--header-h) + 96px);
}

.page-about .about-chapter--plain {
  background: var(--mist);
}

.page-about .about-chapter--teal {
  background: var(--teal);
  color: var(--cream);
  border-color: rgba(246, 241, 231, 0.4);
  box-shadow: 10px 10px 0 rgba(217, 164, 65, 0.28);
}

.page-about .about-chapter--deep {
  background: var(--deep);
  color: var(--cream);
  border-color: var(--gold);
  box-shadow: 10px 10px 0 rgba(242, 107, 78, 0.32);
  margin-bottom: 0;
}

.page-about .about-chapter__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-num {
  margin: 0;
  display: inline-block;
  align-self: start;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--deep);
  border-top: 4px solid var(--gold);
  padding-top: 10px;
}

.page-about .about-chapter--teal .about-num,
.page-about .about-chapter--deep .about-num {
  color: var(--gold);
  border-top-color: var(--coral);
}

.page-about .about-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.42rem, 4.4vw, 2.1rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
}

.page-about .about-lead {
  max-width: 44ch;
  margin: 0 0 26px;
  font-size: clamp(0.96rem, 2.4vw, 1.04rem);
  line-height: 1.85;
  color: rgba(16, 24, 32, 0.78);
}

.page-about .about-chapter--teal .about-lead,
.page-about .about-chapter--deep .about-lead {
  color: rgba(246, 241, 231, 0.82);
}

.page-about .about-body {
  max-width: 44ch;
  margin: 0 0 20px;
  font-size: 0.98rem;
  line-height: 1.88;
  color: rgba(16, 24, 32, 0.82);
}

.page-about .about-body--onDark {
  color: rgba(246, 241, 231, 0.84);
}

/* ---------- 筛选 ---------- */
.page-about .about-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
}

.page-about .about-filter {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  padding: 8px 14px;
  border: 2px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-filter:hover,
.page-about .about-filter:focus-visible {
  border-color: var(--coral);
  color: var(--coral);
}

.page-about .about-filter[aria-pressed="true"] {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--gold);
  font-weight: 700;
}

/* ---------- 原则卡片 ---------- */
.page-about .about-principles {
  display: grid;
  gap: 16px;
}

.page-about .about-principle {
  background: var(--mist);
  border: 2px solid var(--deep);
  border-top: 10px solid var(--gold);
  padding: 20px 18px 22px;
  box-shadow: 6px 6px 0 rgba(11, 34, 57, 0.16);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-principle:nth-child(2) {
  border-top-color: var(--coral);
}

.page-about .about-principle:nth-child(3) {
  border-top-color: var(--green);
}

.page-about .about-principle:hover {
  transform: translate(-3px, -3px);
  box-shadow: 10px 10px 0 rgba(11, 34, 57, 0.22);
}

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

.page-about .about-principle__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .about-principle__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--deep);
}

.page-about .about-principle__text {
  margin: 0 0 16px;
  font-size: 0.94rem;
  line-height: 1.82;
  color: rgba(16, 24, 32, 0.8);
}

.page-about .about-principle__tags {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ---------- 时间线 ---------- */
.page-about .about-track {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: 0 0 28px;
  padding: 20px 0 0;
  border-top: 3px solid rgba(217, 164, 65, 0.55);
}

.page-about .about-track__item {
  position: relative;
}

.page-about .about-track__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border: 2px solid rgba(246, 241, 231, 0.3);
  text-decoration: none;
  color: rgba(246, 241, 231, 0.9);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-track__link:hover,
.page-about .about-track__link:focus-visible {
  border-color: var(--gold);
  background: rgba(217, 164, 65, 0.12);
}

.page-about .about-track__year {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .about-track__label {
  font-size: 0.84rem;
  letter-spacing: 0.04em;
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: 0 0 26px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid rgba(246, 241, 231, 0.45);
}

.page-about .about-figure--wide img {
  aspect-ratio: 16 / 9;
}

.page-about .about-figure--crew img {
  aspect-ratio: 3 / 2;
  border-color: var(--deep);
}

.page-about .about-figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: rgba(246, 241, 231, 0.62);
}

.page-about .about-figure--crew .about-figure__cap {
  color: rgba(16, 24, 32, 0.6);
}

/* ---------- 阶段 ---------- */
.page-about .about-stages {
  border-top: 1px solid rgba(246, 241, 231, 0.28);
}

.page-about .about-stage {
  padding: 18px 0;
  border-bottom: 1px solid rgba(246, 241, 231, 0.28);
  display: grid;
  gap: 6px;
  scroll-margin-top: calc(var(--header-h) + 96px);
}

.page-about .about-stage__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .about-stage__text {
  margin: 0;
  max-width: 46ch;
  font-size: 0.94rem;
  line-height: 1.84;
  color: rgba(246, 241, 231, 0.84);
}

/* ---------- 团队 ---------- */
.page-about .about-crew {
  display: grid;
  gap: 24px;
  margin-bottom: 28px;
}

.page-about .about-crew__row {
  padding: 16px 0;
  border-top: 2px solid var(--deep);
  display: grid;
  gap: 4px;
}

.page-about .about-crew__row:last-child {
  border-bottom: 2px solid var(--deep);
}

.page-about .about-crew__role {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--deep);
}

.page-about .about-crew__desc {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.82;
  color: rgba(16, 24, 32, 0.8);
}

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

.page-about .about-checks__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(16, 24, 32, 0.82);
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(11, 34, 57, 0.25);
}

.page-about .about-checks__num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--coral);
  padding-top: 2px;
}

/* ---------- 支持时段 ---------- */
.page-about .about-hours {
  margin: 0 0 22px;
  border-top: 2px solid var(--deep);
}

.page-about .about-hours__row {
  display: grid;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(11, 34, 57, 0.22);
}

.page-about .about-hours__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--teal);
}

.page-about .about-hours__value {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--deep);
  word-break: break-word;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: 26px;
}

.page-about .about-link {
  display: inline-block;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--deep);
  text-decoration: none;
  border-bottom: 2px solid var(--coral);
  padding-bottom: 2px;
}

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

.page-about .about-link--onDark {
  color: var(--cream);
  border-bottom-color: var(--gold);
}

.page-about .about-link--onDark:hover,
.page-about .about-link--onDark:focus-visible {
  color: var(--gold);
}

.page-about .about-signoff {
  margin: 30px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(246, 241, 231, 0.22);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--sage);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-crew__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 8px 20px;
    align-items: baseline;
  }

  .page-about .about-hours__row {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 4px 20px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-about .about-lede__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    align-items: end;
  }

  .page-about .about-lede__figure {
    order: 1;
  }

  .page-about .about-lede__copy {
    order: 2;
  }

  .page-about .about-lede__figure img {
    aspect-ratio: 3 / 4;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 26px;
  }

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

  .page-about .about-track {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 8px;
    padding-top: 26px;
  }

  .page-about .about-track__item::before {
    content: "";
    position: absolute;
    top: -33px;
    left: 12px;
    width: 11px;
    height: 11px;
    background: var(--coral);
    border: 2px solid var(--teal);
  }

  .page-about .about-track__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 10px 8px;
    border-color: transparent;
  }

  .page-about .about-track__link:hover,
  .page-about .about-track__link:focus-visible {
    background: transparent;
    border-color: rgba(217, 164, 65, 0.6);
  }

  .page-about .about-stage {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .about-crew {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
    gap: 30px;
  }

  .page-about .about-figure--crew {
    margin-bottom: 0;
  }
}

@media (min-width: 1040px) {
  .page-about .about-scroll {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    margin-bottom: 0;
    padding: 0 0 0 16px;
    background: transparent;
    border-bottom: 0;
    border-left: 3px solid var(--gold);
  }

  .page-about .about-toc__title {
    margin-bottom: 12px;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    overflow: visible;
    gap: 4px;
    padding: 0;
  }

  .page-about .about-toc__link {
    padding: 5px 0 5px 10px;
    border: 0;
    border-left: 2px solid transparent;
    font-size: 0.72rem;
  }

  .page-about .about-toc__link[aria-current="true"] {
    background: transparent;
    color: var(--gold);
    border-left-color: var(--coral);
  }

  .page-about .about-chapter {
    scroll-margin-top: calc(var(--header-h) + 28px);
  }

  .page-about .about-stage {
    scroll-margin-top: calc(var(--header-h) + 28px);
  }

  .page-about .about-num {
    font-size: 2.4rem;
  }
}
<<<END>>>