.page-about {
  padding-bottom: 88px;
  color: var(--bone);
}

.page-about [data-section] {
  scroll-margin-top: 76px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 64px;
  border-bottom: 1px solid var(--edge);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(114deg, transparent 60%, rgba(14, 59, 49, 0.9) 60.2%, rgba(14, 59, 49, 0.9) 76%, transparent 76.2%),
    linear-gradient(114deg, transparent 78%, rgba(23, 89, 74, 0.55) 78.2%, rgba(23, 89, 74, 0.55) 88%, transparent 88.2%),
    radial-gradient(circle at 84% 26%, rgba(233, 180, 76, 0.14), transparent 58%);
  pointer-events: none;
}

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

.page-about .about-hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 10vw, 84px);
  line-height: 0.96;
  letter-spacing: -0.035em;
  max-width: 13em;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--gold);
}

.page-about .about-hero__lede {
  margin-top: 24px;
  max-width: 46ch;
}

.page-about .about-hero__signals {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--fog);
}

.page-about .about-hero__signals li {
  position: relative;
  padding-left: 16px;
}

.page-about .about-hero__signals li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border-radius: 50%;
  border: 1px solid var(--gold);
}

/* ---------- 章节通用 ---------- */
.page-about .chapter {
  padding: 56px 0;
  border-bottom: 1px solid var(--edge);
}

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

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 26px;
}

.page-about .chapter__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 5.4vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.02em;
}

.page-about .prose p {
  color: var(--bone);
  font-size: 15px;
  line-height: 1.78;
}

.page-about .prose p + p {
  margin-top: 14px;
}

.page-about .drop p:first-child::first-letter {
  float: left;
  font-size: 3.3em;
  line-height: 0.84;
  padding: 0.06em 0.14em 0 0;
  font-weight: 900;
  color: var(--gold);
}

.page-about .about-lead {
  max-width: 60ch;
  margin: 0 0 8px;
}

/* ---------- 文档库 ---------- */
.page-about .lib {
  display: grid;
  gap: 30px;
}

.page-about .figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .figure {
  padding: 16px 14px 14px;
  background: rgba(5, 22, 30, 0.42);
  border-left: 2px solid var(--gold);
  clip-path: polygon(12px 0, 100% 0, 100% 100%, 0 100%, 0 12px);
}

.page-about .figure__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(32px, 8vw, 50px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-about .figure__cap {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--fog);
}

.page-about .lib__text {
  max-width: 56ch;
}

.page-about .route {
  margin: 26px 0 24px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .route li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(5, 22, 30, 0.38);
  border-left: 2px solid var(--felt-lift);
  clip-path: polygon(10px 0, 100% 0, 100% 100%, 0 100%, 0 10px);
  font-size: 15px;
  line-height: 1.6;
}

.page-about .route b {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--gold);
  padding-top: 4px;
}

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

/* ---------- 团队 ---------- */
.page-about .about-figure {
  margin: 0 0 28px;
}

.page-about .about-figure--mid {
  max-width: 420px;
  margin: 36px auto 0;
}

.page-about .crews {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-about .crew {
  position: relative;
  padding: 22px 18px 20px;
  background: var(--felt);
  clip-path: polygon(16px 0, 100% 0, 100% 100%, 0 100%, 0 16px);
}

.page-about .crew::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 52px;
  height: 2px;
  background: var(--gold);
  opacity: 0.7;
}

.page-about .crew__n {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold-pale);
}

.page-about .crew__title {
  margin: 10px 0 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .crew__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--fog);
}

/* ---------- 流程折线 ---------- */
.page-about .flow {
  position: relative;
  margin: 34px 0 0;
}

.page-about .flow__svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 44px;
  pointer-events: none;
}

.page-about .flow__list {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 4px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--bone);
}

.page-about .flow__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--abyss);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px var(--abyss);
  transition: background 0.3s var(--ease);
}

.page-about .flow__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--fog);
  text-align: center;
}

.page-about .flow__node:hover .flow__dot,
.page-about .flow__node:focus-visible .flow__dot {
  background: var(--gold);
}

.page-about .flow__node:hover .flow__label,
.page-about .flow__node:focus-visible .flow__label {
  color: var(--gold-pale);
}

/* ---------- 五步说明 ---------- */
.page-about .steps {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .steps__item {
  padding: 16px 0;
  border-top: 1px solid var(--edge);
}

.page-about .steps__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--gold-pale);
}

.page-about .steps__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--edge);
  transition: border-color 0.3s var(--ease);
}

.page-about .tl:last-child {
  border-bottom: 0;
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold);
  padding-top: 3px;
  transition: color 0.3s var(--ease);
}

.page-about .tl__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .tl__body p {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--fog);
}

.page-about .tl__body .tl__more {
  margin: 0;
  font-size: 14px;
  color: var(--gold-pale);
  opacity: 0.72;
}

.page-about .tl:hover .tl__year,
.page-about .tl:focus-within .tl__year {
  color: var(--volt);
}

.page-about .tl:hover {
  border-color: var(--felt-lift);
}

/* ---------- 反馈路径 ---------- */
.page-about .recover {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: rc;
  max-width: 68ch;
}

.page-about .recover li {
  position: relative;
  counter-increment: rc;
  padding: 16px 0 16px 46px;
  border-bottom: 1px dashed var(--edge);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .recover li::before {
  content: counter(rc, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

/* ---------- 收尾联系方式 ---------- */
.page-about .tail {
  margin-top: 40px;
  max-width: 430px;
  padding: 24px 20px 20px;
  background: var(--felt);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .tail__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .tail__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--bone);
  word-break: break-word;
}

.page-about .tail__k {
  flex: none;
  width: 2.6em;
  color: var(--fog);
  font-size: 13px;
}

.page-about .tail__row a {
  color: var(--gold-pale);
  text-decoration: none;
  border-bottom: 1px solid rgba(246, 220, 160, 0.35);
}

.page-about .tail__row a:hover {
  color: var(--volt);
  border-color: var(--volt);
}

.page-about .tail__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(155, 175, 178, 0.28);
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog);
}

.page-about .tail__row a:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 2px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .chapter {
    padding: 72px 0;
  }

  .page-about .drop {
    border-left: 1px solid var(--edge);
    padding-left: 24px;
    max-width: 72ch;
  }

  .page-about .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px 32px;
  }

  .page-about .flow__label {
    font-size: 12px;
  }
}

@media (min-width: 900px) {
  .page-about {
    padding-bottom: 112px;
  }

  .page-about .about-hero {
    padding: 68px 0 84px;
  }

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

  .page-about .lib {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
    gap: 44px;
  }

  .page-about .lib__media {
    margin-top: 6px;
  }

  .page-about .crews {
    grid-template-columns: 5fr 3fr 3fr;
    align-items: start;
    gap: 14px;
  }

  .page-about .crew--a {
    padding-bottom: 56px;
  }

  .page-about .crew--c {
    padding-top: 44px;
  }

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

  .page-about .tl {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 30px;
    padding: 24px 0;
  }

  .page-about .tl__year {
    font-size: 15px;
  }

  .page-about .tl__body--narrow,
  .page-about .tl:nth-child(even) .tl__body {
    max-width: 48ch;
    padding-left: 6%;
  }

  .page-about .tl:nth-child(odd) .tl__body {
    max-width: 60ch;
  }

  .page-about .about-figure--mid {
    max-width: 460px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl,
  .page-about .tl__year,
  .page-about .flow__dot {
    transition: none;
  }
}
<<<END>>>