.page-about {
  --about-chapter-gap: clamp(56px, 8vw, 104px);
  --about-measure: 40rem;
  background: var(--ink-900);
  color: var(--mist);
}

.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 64px) 0 56px;
  background:
    radial-gradient(120% 140% at 8% -20%, rgba(47, 125, 255, 0.22), transparent 58%),
    radial-gradient(90% 120% at 96% 0%, rgba(255, 122, 26, 0.10), transparent 62%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(156, 192, 255, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(156, 192, 255, 0.06) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 78%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 78%);
}

.page-about .about-hero > .content-wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  margin: 20px 0 0;
  max-width: 20em;
  font-size: clamp(2rem, 5.4vw, var(--fz-64));
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: var(--fz-16);
  line-height: 1.75;
  color: var(--ice);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 44px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-hero__facts li {
  padding: 18px 18px 20px;
  background: rgba(11, 18, 32, 0.86);
}

.page-about .about-fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fz-28);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact-label {
  display: block;
  margin-top: 8px;
  font-size: var(--fz-12);
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-body {
  display: grid;
  gap: 32px;
  padding-top: 48px;
  padding-bottom: 88px;
}

/* 章节索引 */
.page-about .about-toc {
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 16px;
}

.page-about .about-toc-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fz-12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ice);
}

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

.page-about .about-toc-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(17, 28, 46, 0.7);
  color: var(--mist);
  font-size: var(--fz-14);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-toc-key {
  font-family: var(--font-mono);
  font-size: var(--fz-12);
  color: var(--orange);
}

.page-about .about-toc-link:hover,
.page-about .about-toc-link:focus-visible {
  border-color: var(--blue);
  background: var(--blue-soft);
  color: var(--white);
}

/* 章节 */
.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: var(--about-chapter-gap);
  min-width: 0;
}

.page-about .about-chapter {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-chapter-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-chapter-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fz-28);
  font-weight: 700;
  line-height: 1;
  color: var(--ink-600);
  -webkit-text-stroke: 1px var(--line);
}

.page-about .about-chapter-head h2 {
  margin: 0;
  font-size: clamp(1.375rem, 3vw, var(--fz-28));
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-chapter p {
  max-width: var(--about-measure);
  margin: 20px 0 0;
  font-size: var(--fz-16);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-inline-link {
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  color: var(--ice);
}

.page-about .about-inline-link a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 125, 255, 0.45);
}

.page-about .about-inline-link a:hover,
.page-about .about-inline-link a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--orange);
}

/* 图片 */
.page-about .about-figure {
  margin: 32px 0 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(160deg, rgba(17, 28, 46, 0.95), rgba(6, 8, 13, 0.95));
  box-shadow: var(--shadow-1);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 1px;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.page-about .about-figure figcaption {
  margin-top: 12px;
  padding: 0 4px 2px;
  font-size: var(--fz-12);
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* 时间线 */
.page-about .about-timeline {
  margin-top: 36px;
  padding: 22px 16px 8px;
  border: 1px solid var(--line-soft);
  background:
    linear-gradient(180deg, rgba(17, 28, 46, 0.75), rgba(11, 18, 32, 0.55));
}

.page-about .about-timeline-svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-tl-node circle {
  fill: var(--ink-900);
  stroke: var(--blue);
  stroke-width: 2;
  transition: stroke var(--dur) var(--ease), r var(--dur) var(--ease);
}

.page-about .about-tl-node:hover circle {
  stroke: var(--orange);
}

.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  fill: var(--white);
}

.page-about .about-tl-sub {
  font-family: var(--font-sans);
  font-size: 12px;
  fill: var(--mist);
}

.page-about .about-timeline-notes {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  font-size: var(--fz-14);
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-timeline-notes li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

/* 能力清单 */
.page-about .about-capabilities {
  display: grid;
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-cap {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 8px;
  padding: 20px 18px 22px;
  background: var(--ink-800);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-cap:hover {
  background: var(--ink-700);
}

.page-about .about-cap-key {
  font-family: var(--font-mono);
  font-size: var(--fz-14);
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.08em;
}

.page-about .about-cap-body h3 {
  margin: 0;
  font-size: var(--fz-16);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-cap-body p {
  margin: 8px 0 0;
  font-size: var(--fz-14);
  line-height: 1.75;
  color: var(--mist);
}

/* 四步流程 */
.page-about .about-steps {
  display: grid;
  gap: 20px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-steps li {
  position: relative;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--blue);
  background: rgba(17, 28, 46, 0.62);
}

.page-about .about-step-num {
  font-family: var(--font-mono);
  font-size: var(--fz-12);
  letter-spacing: 0.16em;
  color: var(--ice);
}

.page-about .about-steps h3 {
  margin: 8px 0 0;
  font-size: var(--fz-20);
  font-weight: 800;
  color: var(--white);
}

.page-about .about-steps p {
  margin: 8px 0 0;
  font-size: var(--fz-14);
  line-height: 1.75;
  color: var(--mist);
}

/* 团队条形图 */
.page-about .about-team-bars {
  display: grid;
  gap: 22px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team-bar-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-team-bar-name {
  font-size: var(--fz-16);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-team-bar-count {
  font-family: var(--font-mono);
  font-size: var(--fz-14);
  font-weight: 700;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team-bar-track {
  display: block;
  height: 10px;
  margin-top: 10px;
  background: rgba(34, 48, 71, 0.7);
  border: 1px solid var(--line-soft);
}

.page-about .about-team-bar-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--ice));
  transition: filter var(--dur-slow) var(--ease);
}

.page-about .about-team-bar:hover .about-team-bar-fill {
  filter: brightness(1.3);
}

.page-about .about-team-bar-fill--editors { width: 57.9%; }
.page-about .about-team-bar-fill--tech { width: 21%; }
.page-about .about-team-bar-fill--ops { width: 10.5%; }
.page-about .about-team-bar-fill--content { width: 10.5%; background: linear-gradient(90deg, var(--orange), var(--amber)); }

.page-about .about-team-bar-duty {
  display: block;
  margin-top: 10px;
  font-size: var(--fz-12);
  line-height: 1.7;
  color: var(--mist);
}

/* 协作方 */
.page-about .about-partners {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-partner-figure {
  padding: 22px 20px 24px;
  background: var(--ink-800);
}

.page-about .about-partner-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fz-40);
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partner-num--orange {
  color: var(--orange);
}

.page-about .about-partner-figure p {
  margin: 12px 0 0;
  font-size: var(--fz-14);
  line-height: 1.75;
  color: var(--mist);
}

/* 服务对象 */
.page-about .about-audience {
  display: grid;
  gap: 1px;
  margin: 28px 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-audience > div {
  padding: 18px 18px 20px;
  background: var(--ink-800);
}

.page-about .about-audience dt {
  font-size: var(--fz-16);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-audience dd {
  margin: 8px 0 0;
  font-size: var(--fz-14);
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-coverage {
  display: grid;
  gap: 20px;
  margin-top: 32px;
  padding: 24px 20px;
  border: 1px solid var(--line);
  background:
    radial-gradient(90% 140% at 100% 0%, rgba(47, 125, 255, 0.16), transparent 60%),
    rgba(11, 18, 32, 0.9);
}

.page-about .about-coverage-item .data-figure {
  display: block;
  font-size: var(--fz-28);
  color: var(--white);
}

.page-about .about-coverage-item p {
  margin: 10px 0 0;
  max-width: 32em;
  font-size: var(--fz-14);
  line-height: 1.75;
  color: var(--mist);
}

/* 三件坚持的事 */
.page-about .about-principles {
  display: grid;
  gap: 1px;
  margin: 28px 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-principle {
  padding: 22px 20px 24px;
  background: var(--ink-800);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-principle:hover {
  background: var(--ink-700);
}

.page-about .about-principle h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: var(--fz-16);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-principle p {
  margin: 10px 0 0;
  font-size: var(--fz-14);
  line-height: 1.78;
  color: var(--mist);
}

/* 收尾 */
.page-about .about-cta {
  margin-top: 44px;
  padding: 28px 22px 30px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--orange);
  background:
    radial-gradient(100% 160% at 0% 0%, rgba(255, 122, 26, 0.12), transparent 62%),
    linear-gradient(160deg, var(--ink-700), var(--ink-800));
}

.page-about .about-cta-title {
  margin: 0;
  font-size: clamp(1.25rem, 2.6vw, var(--fz-20));
  font-weight: 800;
  line-height: 1.4;
  color: var(--white);
}

.page-about .about-cta p {
  margin: 12px 0 0;
  max-width: 38em;
  font-size: var(--fz-14);
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-cta-actions .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-timeline-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 24px;
  }

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

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

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

  .page-about .about-coverage {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 104px);
    padding-bottom: 72px;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    max-width: 1080px;
  }

  .page-about .about-body {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 72px;
    padding-top: 64px;
    padding-bottom: 120px;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    align-self: start;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding: 0 0 0 18px;
  }

  .page-about .about-toc-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-toc-link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    padding: 8px 0 8px 12px;
    min-height: 40px;
    margin-left: -20px;
  }

  .page-about .about-toc-link:hover,
  .page-about .about-toc-link:focus-visible {
    border-left-color: var(--orange);
    background: transparent;
    color: var(--white);
  }

  .page-about .about-figure {
    padding: 14px;
  }

  .page-about .about-figure--wide {
    max-width: 820px;
  }

  .page-about .about-figure--tall {
    max-width: 880px;
  }

  .page-about .about-cap {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 12px;
    padding: 24px 26px 26px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    background: var(--line-soft);
    border: 1px solid var(--line-soft);
  }

  .page-about .about-steps li {
    border: 0;
    border-top: 2px solid var(--blue);
    background: var(--ink-800);
    padding: 22px 18px 24px;
  }

  .page-about .about-timeline {
    padding: 28px 28px 12px;
  }

  .page-about .about-timeline-notes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-team-bars {
    gap: 26px;
  }

  .page-about .about-cta {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    padding: 36px 34px 36px;
  }

  .page-about .about-cta p {
    flex: 1 1 340px;
  }

  .page-about .about-cta-actions {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl-node circle,
  .page-about .about-team-bar-fill,
  .page-about .about-cap,
  .page-about .about-principle,
  .page-about .about-toc-link {
    transition: none;
  }
}
<<<END>>>