.page-about {
  background:
    radial-gradient(1100px 560px at 84% -8%, rgba(123, 245, 214, 0.10), transparent 62%),
    radial-gradient(820px 520px at 4% 42%, rgba(155, 123, 255, 0.08), transparent 60%),
    var(--ink-800);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-wrap: break-word;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about .about-wrap {
  width: min(calc(100% - 2 * var(--gutter)), var(--shell));
  margin-inline: auto;
}

.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .breadcrumbs__link {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

.page-about .breadcrumbs__current {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(24px, 4vw, 48px) clamp(36px, 6vw, 80px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-about .about-hero__text {
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-hero__chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--muted);
  background: rgba(20, 61, 52, 0.6);
}

.page-about .about-chip .num {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-700);
}

.page-about .about-hero__figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.62) contrast(1.1) brightness(0.92);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(232, 243, 238, 0.07) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(0deg, rgba(232, 243, 238, 0.05) 0 1px, transparent 1px 56px);
  pointer-events: none;
}

.page-about .about-hero__cap {
  position: relative;
  padding: 12px 16px;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--ink-700);
}

/* ---------- 主体：索引 + 流程 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange);
  font-family: var(--font-mono);
}

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

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-index__link .num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--orange);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-index__link:hover .num,
.page-about .about-index__link:focus-visible .num {
  color: var(--ink-900);
}

.page-about .about-index__hint {
  display: none;
  margin: 16px 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--muted);
  border-left: 2px solid var(--cyan);
  padding-left: 10px;
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding-block: clamp(30px, 5vw, 54px);
  border-top: 1px solid var(--line);
}

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

.page-about .about-sec__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .about-sec__num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 6vw, 3.1rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--orange);
}

.page-about .about-sec__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 3.6vw, 1.95rem);
  line-height: 1.24;
  letter-spacing: -0.015em;
  margin: 0;
}

.page-about .about-sec__note {
  margin: 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--muted);
}

.page-about .about-sec__body > p {
  max-width: 64ch;
  margin: 0 0 16px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--paper);
}

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

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(123, 245, 214, 0.4);
}

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

.page-about .about-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 64ch;
}

.page-about .about-list li {
  position: relative;
  padding-left: 26px;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 16px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 资料地图 ---------- */
.page-about .about-map {
  margin: 26px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-900);
}

.page-about .about-map img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.08);
}

.page-about .about-map__cap {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-dims {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-dim {
  background: var(--ink-600);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.page-about .about-dim__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--violet);
  letter-spacing: 0.08em;
}

.page-about .about-dim__title {
  margin: 8px 0 8px;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-about .about-dim p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 24px 0;
}

.page-about .about-coverage__cell {
  background: var(--ink-700);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 3px solid var(--cyan);
}

.page-about .about-coverage__cell:nth-child(2n) {
  border-top-color: var(--orange);
}

.page-about .about-coverage__cell:nth-child(3n) {
  border-top-color: var(--violet);
}

.page-about .about-coverage__idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.1em;
}

.page-about .about-coverage__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0 0 24px;
}

.page-about .about-stat {
  background: var(--ink-800);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.03em;
}

.page-about .about-stat__label {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 内容类型 ---------- */
.page-about .about-types {
  list-style: none;
  margin: 22px 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-type {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: rgba(15, 46, 39, 0.7);
}

.page-about .about-type p {
  margin: 10px 0 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: start;
}

.page-about .about-team__text p {
  margin: 0 0 14px;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--paper);
  max-width: 62ch;
}

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

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-700);
}

.page-about .about-team__figure img {
  width: 100%;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  filter: saturate(0.66) contrast(1.1);
}

.page-about .about-team__cap {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-roles {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-role {
  background: var(--ink-700);
  padding: 16px;
  display: grid;
  gap: 6px;
  grid-template-columns: auto 1fr;
  align-items: baseline;
}

.page-about .about-role__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--orange);
  grid-row: span 2;
  padding-right: 10px;
}

.page-about .about-role h3 {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-about .about-role p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--muted);
  grid-column: 2;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 6px 0 0;
  padding: 0 0 0 20px;
  border-left: 1px solid var(--line);
  display: grid;
  gap: 12px;
}

.page-about .about-timeline > li {
  position: relative;
}

.page-about .about-timeline > li::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(123, 245, 214, 0.14);
}

.page-about .about-tl {
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 16px;
}

.page-about .about-tl[open] {
  border-color: rgba(123, 245, 214, 0.45);
}

.page-about .about-tl summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 0;
}

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

.page-about .about-tl summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 1rem;
}

.page-about .about-tl[open] summary::after {
  content: "−";
  color: var(--cyan);
}

.page-about .about-tl__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--orange);
  letter-spacing: 0.08em;
}

.page-about .about-tl__title {
  font-weight: 800;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
}

.page-about .about-tl p {
  margin: 0 0 16px;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  margin-top: 28px;
  padding: clamp(22px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--ink-700);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: -60%;
  right: -12%;
  width: 58%;
  height: 220%;
  background: rgba(155, 123, 255, 0.14);
  transform: rotate(-18deg);
  pointer-events: none;
}

.page-about .about-cta__title {
  position: relative;
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.15rem, 3vw, 1.55rem);
  letter-spacing: -0.01em;
}

.page-about .about-cta__text {
  position: relative;
  margin: 0;
  max-width: 56ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-cta__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-dims {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

  .page-about .about-coverage {
    grid-template-columns: repeat(5, 1fr);
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .about-team {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

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

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    border-radius: var(--radius-sm);
    border-color: transparent;
    border-left: 2px solid transparent;
    padding: 9px 10px;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    background: rgba(123, 245, 214, 0.12);
    color: var(--cyan);
    border-color: transparent;
    border-left-color: var(--cyan);
  }

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

  .page-about .about-index__hint {
    display: block;
  }

  .page-about .about-sec__head {
    grid-template-columns: auto 1fr;
    grid-template-areas:
      "num title"
      "num note";
    column-gap: 22px;
    align-items: start;
  }

  .page-about .about-sec__num {
    grid-area: num;
    font-size: clamp(2.6rem, 4vw, 3.4rem);
  }

  .page-about .about-sec__title {
    grid-area: title;
  }

  .page-about .about-sec__note {
    grid-area: note;
  }

  .page-about .about-map {
    margin-top: 28px;
  }
}
<<<PAGE_CSS_END>>>