.page-about {
  --about-edge: rgba(30, 58, 82, 0.9);
  --about-paper-line: rgba(231, 224, 210, 0.28);
  background: var(--ink-900);
  color: var(--text-light);
  padding-bottom: 64px;
}

.page-about .about-crumb-wrap {
  padding-top: 18px;
  padding-bottom: 4px;
}

.page-about .breadcrumb-list a {
  color: var(--text-soft);
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 48px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(30, 58, 82, 0.85) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(30, 58, 82, 0.5) 0 1px, transparent 1px 88px);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-about .about-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 9vw, 84px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--text-light);
}

.page-about .about-title span {
  display: block;
}

.page-about .about-title-hi {
  color: var(--lime);
}

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 54ch;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-marks {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-blue);
}

.page-about .about-marks li {
  padding: 14px 12px 14px 0;
  border-bottom: 1px solid var(--line-blue);
}

.page-about .about-mark-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--lime);
}

.page-about .about-marks li:nth-child(2) .about-mark-num,
.page-about .about-marks li:nth-child(3) .about-mark-num {
  color: var(--amber);
}

.page-about .about-mark-label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-dim);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--line-blue);
  border-radius: var(--radius-capsule);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-light);
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.page-about .about-btn:hover {
  border-color: var(--lime);
  color: var(--lime);
}

.page-about .about-btn--primary {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-900);
  font-weight: 600;
}

.page-about .about-btn--primary:hover {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink-900);
}

.page-about .about-hero-figure {
  position: relative;
  margin: 0;
  padding: 7px;
  border: 1px solid var(--line-blue);
  background: var(--ink-800);
}

.page-about .about-hero-figure::after {
  content: "";
  position: absolute;
  top: -10px;
  left: -10px;
  right: 10px;
  bottom: 10px;
  border: 1px solid var(--about-paper-line);
  pointer-events: none;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 5;
  object-fit: cover;
}

/* ===== 索引 + 章节骨架 ===== */
.page-about .about-shell {
  padding-top: 14px;
}

.page-about .about-index {
  margin-bottom: 10px;
}

.page-about .about-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
}

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

.page-about .about-index-list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-blue);
  border-radius: var(--radius-capsule);
  font-size: 13px;
  color: var(--text-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  border-color: var(--lime);
  color: var(--text-light);
}

.page-about .about-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--lime);
}

.page-about .about-chapter {
  padding: 38px 0 42px;
  border-top: 1px solid var(--line-blue);
  scroll-margin-top: 96px;
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 6px;
}

.page-about .about-chapter-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  margin-bottom: 18px;
}

.page-about .about-chapter-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.page-about .about-chapter-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(23px, 5vw, 36px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--text-light);
}

.page-about .about-prose p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

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

/* ===== 时间轴 ===== */
.page-about .about-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  bottom: 20px;
  width: 1px;
  background: var(--line-blue);
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 24px 26px;
}

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

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--lime);
  background: var(--ink-900);
  transform: rotate(45deg);
}

.page-about .about-timeline-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-timeline-body h3 {
  margin: 6px 0 4px;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-light);
}

.page-about .about-timeline-body p {
  margin: 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ===== 资料管线 ===== */
.page-about .about-pipeline {
  margin: 26px 0 0;
}

.page-about .about-pipe-graphic {
  display: none;
}

.page-about .about-pipe-line {
  stroke: var(--line-blue);
  stroke-width: 1;
}

.page-about .about-pipe-tick {
  stroke: var(--lime);
  stroke-width: 2;
}

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

.page-about .about-step {
  position: relative;
  padding: 18px 16px 16px;
  border: 1px solid var(--line-blue);
  background: var(--ink-800);
  transform: rotate(-0.35deg);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .about-step:nth-child(even) {
  transform: rotate(0.35deg);
}

.page-about .about-step:hover {
  transform: rotate(0deg);
  border-color: var(--lime);
}

.page-about .about-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 16px;
  width: 28px;
  height: 2px;
  background: var(--lime);
}

.page-about .about-step-code {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .about-step h3 {
  margin: 8px 0 6px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-light);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ===== 章节配图 ===== */
.page-about .about-figure {
  margin: 26px 0 0;
  padding: 6px;
  border: 1px solid var(--line-blue);
  background: var(--ink-800);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  padding: 10px 4px 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ===== 纸片：团队分工 ===== */
.page-about .about-paper {
  position: relative;
  margin: 24px 0;
  padding: 22px 18px;
  border: 1px solid var(--paper-2);
  background: var(--paper);
  color: var(--text-dark);
  box-shadow: 8px 8px 0 rgba(231, 224, 210, 0.12);
}

.page-about .about-paper-title {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
}

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

.page-about .about-crew li {
  padding-top: 12px;
  border-top: 1px solid rgba(20, 32, 43, 0.16);
}

.page-about .about-crew-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--lime-deep);
}

.page-about .about-crew-label {
  display: block;
  margin-top: 2px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
}

.page-about .about-crew-note {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--rock);
}

/* ===== 指标带 ===== */
.page-about .about-metrics {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 1px;
  background: var(--line-blue);
  border: 1px solid var(--line-blue);
}

.page-about .about-metrics li {
  padding: 16px 14px;
  background: var(--ink-800);
}

.page-about .about-metric-num {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--lime);
}

.page-about .about-metric-label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-dim);
}

/* ===== 荣誉 ===== */
.page-about .about-honors {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-honors li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  border-left: 2px solid var(--clay);
  background: rgba(43, 53, 64, 0.55);
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-soft);
}

.page-about .about-honor-year {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--amber);
}

/* ===== 联系块 ===== */
.page-about .about-contact {
  margin-top: 24px;
  padding: 18px;
  display: grid;
  gap: 14px;
  border: 1px solid var(--line-blue);
  background: var(--ink-800);
}

.page-about .about-contact-row {
  display: grid;
  gap: 3px;
}

.page-about .about-contact-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-about .about-contact-value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-light);
  overflow-wrap: anywhere;
}

.page-about .about-contact-row--wide {
  padding-top: 12px;
  border-top: 1px solid var(--line-blue);
}

/* ===== 页尾服务条 ===== */
.page-about .about-cta {
  margin-top: 36px;
  padding-top: 26px;
  border-top: 1px solid var(--line-blue);
  display: grid;
  gap: 16px;
}

.page-about .about-cta p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.5;
  color: var(--text-light);
}

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

/* ===== 断点 ===== */
@media (min-width: 640px) {
  .page-about .about-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 24px;
    padding: 22px;
  }

  .page-about .about-contact-row--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 720px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-lede {
    font-size: 17px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 56px 0 76px;
  }

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-hero-figure {
    margin-top: 34px;
  }

  .page-about .about-shell {
    display: grid;
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 26px;
  }

  .page-about .about-index {
    position: sticky;
    top: 104px;
    margin-bottom: 0;
  }

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

  .page-about .about-index-list a {
    align-items: center;
    padding: 12px 0 12px 14px;
    border: 0;
    border-left: 2px solid var(--line-blue);
    border-radius: 0;
    white-space: normal;
  }

  .page-about .about-index-list a:hover,
  .page-about .about-index-list a:focus-visible {
    border-left-color: var(--lime);
    background: rgba(200, 255, 77, 0.06);
  }

  .page-about .about-chapter {
    padding: 46px 0 52px;
  }

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

  .page-about .about-pipe-graphic {
    display: block;
    margin-bottom: 6px;
  }

  .page-about .about-pipe-svg {
    display: block;
    width: 100%;
    height: 52px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    margin-top: 44px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-marks li {
    padding-right: 18px;
  }

  .page-about .about-figure {
    margin-top: 30px;
  }

  .page-about .about-figure img {
    aspect-ratio: 16 / 9;
  }
}
<<<END>>>