.page-about {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
}

.page-about .container {
  width: min(100% - 32px, var(--max));
  margin-inline: auto;
}

.page-about .about-masthead {
  padding-top: 20px;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 10px;
  color: var(--edge);
}

.page-about .breadcrumb__list a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .breadcrumb__list a:hover,
.page-about .breadcrumb__list a:focus-visible {
  color: var(--lime);
}

.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--paper);
}

.page-about .about-hero {
  position: relative;
  padding: 28px 0 48px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(75, 224, 199, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(75, 224, 199, .08) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(120% 78% at 72% 0%, #000 15%, transparent 72%);
  mask-image: radial-gradient(120% 78% at 72% 0%, #000 15%, transparent 72%);
  pointer-events: none;
}

.page-about .eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  position: relative;
  margin: 0 0 20px;
  max-width: 17ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7.4vw, 72px);
  line-height: 1.02;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  position: relative;
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
  margin: 36px 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--edge);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 6vw, 40px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-chapter {
  padding: 52px 0;
  border-top: 1px solid var(--edge);
}

.page-about .about-chapter__inner {
  display: grid;
  gap: 20px;
}

.page-about .about-chapter__no {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: clamp(52px, 12vw, 108px);
  line-height: .82;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(200, 255, 77, .5);
}

.page-about .chapter-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.8vw, 38px);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-subtitle {
  margin: 30px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-text {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-text--after {
  margin-top: 22px;
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(75, 224, 199, .45);
}

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

/* ---------- 章节预览 ---------- */

.page-about .about-preview {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--edge);
}

.page-about .about-preview li {
  border-bottom: 1px solid var(--edge);
}

.page-about .about-preview a {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 15px 0;
  text-decoration: none;
  color: var(--paper);
}

.page-about .about-preview__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-about .about-preview__title {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--paper);
}

.page-about .about-preview__desc {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-preview a:hover .about-preview__title,
.page-about .about-preview a:focus-visible .about-preview__title {
  color: var(--lime);
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  margin: 22px 0 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 14px;
  width: 1px;
  background: var(--edge);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 26px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 9px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 1px solid var(--lime);
  box-sizing: border-box;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-timeline__title {
  margin: 6px 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-timeline__item[data-reveal] {
  transition: opacity .45s var(--ease), transform .45s var(--ease);
}

/* ---------- 通栏图 ---------- */

.page-about .about-break {
  margin: 0 auto;
  padding: 0 0 8px;
}

.page-about .about-break .media-frame,
.page-about .about-split__figure .media-frame,
.page-about .about-honor__figure .media-frame {
  overflow: hidden;
  border: 1px solid var(--edge);
  background: var(--panel);
}

.page-about .about-break img,
.page-about .about-split__figure img,
.page-about .about-honor__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-break .media-caption {
  display: block;
  padding: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--mist);
}

/* ---------- 米白纸张章节 ---------- */

.page-about .about-chapter--paper {
  background: var(--paper);
  color: var(--ink);
  border-top: 1px solid var(--warm);
  border-bottom: 1px solid var(--warm);
}

.page-about .about-chapter--paper .eyebrow {
  color: #2b5d4f;
}

.page-about .about-chapter--paper .about-chapter__no {
  -webkit-text-stroke: 1px rgba(8, 28, 23, .35);
}

.page-about .about-chapter--paper .chapter-title {
  color: var(--ink);
}

.page-about .about-chapter--paper .about-text {
  color: rgba(8, 28, 23, .8);
}

.page-about .about-chapter--paper .about-subtitle {
  color: #b8431f;
}

.page-about .about-chapter--paper .media-frame {
  border-color: var(--warm);
  background: var(--warm);
}

.page-about .about-chapter--paper .media-caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: rgba(8, 28, 23, .6);
}

/* ---------- 团队条形图 ---------- */

.page-about .about-team {
  margin: 22px 0 26px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-team__item {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr) 34px;
  align-items: center;
  gap: 12px;
}

.page-about .about-team__role {
  font-size: 13px;
  line-height: 1.3;
  color: rgba(8, 28, 23, .82);
}

.page-about .about-team__track {
  display: block;
  height: 10px;
  background: rgba(8, 28, 23, .08);
  border: 1px solid rgba(8, 28, 23, .16);
}

.page-about .about-team__fill {
  display: block;
  height: 100%;
  background: #0f3a2e;
}

.page-about .about-team__item:nth-child(1) .about-team__fill { width: 39%; }
.page-about .about-team__item:nth-child(2) .about-team__fill { width: 26%; }
.page-about .about-team__item:nth-child(3) .about-team__fill { width: 20%; background: #b8431f; }
.page-about .about-team__item:nth-child(4) .about-team__fill { width: 15%; }

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 16px;
  text-align: right;
  color: var(--ink);
}

.page-about .about-split {
  display: grid;
  gap: 22px;
  margin-top: 8px;
}

.page-about .about-split__figure {
  margin: 0;
}

/* ---------- 三道工序 ---------- */

.page-about .about-steps {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-steps__item {
  padding: 20px;
  border: 1px solid var(--edge);
  background: var(--panel);
}

.page-about .about-steps__index {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .about-steps__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 覆盖数字与合作 ---------- */

.page-about .about-figures {
  margin: 22px 0 0;
  padding: 20px 0 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  border-top: 1px dashed var(--edge);
}

.page-about .about-figures__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 5.4vw, 34px);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-figures__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-partners__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-partners__item {
  padding: 16px;
  border: 1px solid var(--edge);
  background: rgba(16, 44, 36, .55);
}

.page-about .about-partners__item p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 认证与折叠 ---------- */

.page-about .about-honor {
  display: grid;
  gap: 26px;
  margin-top: 8px;
}

.page-about .about-honor__figure {
  margin: 0;
}

.page-about .about-accordion {
  border-top: 1px solid rgba(8, 28, 23, .2);
}

.page-about .about-accordion .accordion__item {
  border-bottom: 1px solid rgba(8, 28, 23, .2);
}

.page-about .about-accordion .accordion__trigger {
  position: relative;
  width: 100%;
  padding: 16px 36px 16px 0;
  border: 0;
  background: none;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.45;
  color: var(--ink);
  cursor: pointer;
}

.page-about .about-accordion .accordion__trigger::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: #2b5d4f;
}

.page-about .about-accordion .accordion__trigger[aria-expanded="true"]::after {
  content: "–";
}

.page-about .about-accordion .accordion__trigger:focus-visible {
  outline: 2px solid #0f3a2e;
  outline-offset: 3px;
}

.page-about .about-accordion .accordion__panel {
  padding: 0 0 18px;
}

.page-about .about-accordion .accordion__panel p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(8, 28, 23, .8);
}

/* ---------- 结尾 ---------- */

.page-about .about-cta {
  padding: 48px 0 64px;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 20px;
  padding: 26px 22px;
  border: 1px solid var(--edge);
  background: var(--panel);
  box-shadow: var(--shadow-lift);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .about-hero {
    padding: 36px 0 56px;
  }

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

  .page-about .about-team__item {
    grid-template-columns: 96px minmax(0, 1fr) 40px;
  }
}

@media (min-width: 900px) {
  .page-about .container {
    width: min(100% - 64px, var(--max));
  }

  .page-about .about-hero {
    padding: 48px 0 64px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-chapter {
    padding: 72px 0;
  }

  .page-about .about-chapter__inner {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-chapter__head {
    position: sticky;
    top: 96px;
  }

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

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

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

  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-honor {
    grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 34px 32px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-chapter__inner {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 72px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 400px);
  }

  .page-about .about-honor {
    grid-template-columns: minmax(0, 400px) minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}
<<<END>>>