.page-about {
  --about-line: rgba(242, 244, 239, 0.15);
  --about-track: rgba(198, 255, 61, 0.42);
  --about-text: rgba(242, 244, 239, 0.8);
  --about-text-dim: rgba(242, 244, 239, 0.66);
  background: var(--grass);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-about .about-masthead {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 6vw, 76px) 0 clamp(38px, 5.5vw, 72px);
  background:
    radial-gradient(120% 92% at 86% 4%, rgba(198, 255, 61, 0.18) 0%, rgba(198, 255, 61, 0) 58%),
    linear-gradient(166deg, var(--grass) 0%, var(--moss) 48%, var(--ink) 100%);
}

.page-about .about-masthead::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -16%;
  width: min(560px, 66%);
  aspect-ratio: 1 / 1;
  background: var(--lime);
  opacity: 0.09;
  transform: rotate(28deg);
  pointer-events: none;
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--lime) 0%, var(--lime) 24%, rgba(198, 255, 61, 0) 76%);
}

.page-about .breadcrumbs {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(20px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--about-text-dim);
}

.page-about .breadcrumbs a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.45);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-about .breadcrumbs__sep {
  margin: 0 0.55em;
  color: rgba(242, 244, 239, 0.4);
}

.page-about .about-kicker {
  position: relative;
  z-index: 1;
  display: inline-block;
  margin: 0 0 20px;
  padding: 6px 12px;
  border: 2px solid var(--lime);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-title {
  position: relative;
  z-index: 1;
  margin: 0 0 22px;
  max-width: min(840px, 100%);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 70px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-lede {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 0 clamp(28px, 4vw, 46px);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.88;
  color: var(--about-text);
}

.page-about .about-figures {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: rgba(242, 244, 239, 0.16);
  border: 1px solid rgba(242, 244, 239, 0.16);
}

.page-about .about-figures > div {
  background: rgba(6, 31, 25, 0.62);
  padding: 16px clamp(12px, 1.6vw, 22px);
}

.page-about .about-figures dt {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey);
}

.page-about .about-figures dd {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1;
  color: var(--lime);
}

.page-about .about-figures dd span {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--about-text-dim);
}

/* ---------- 通栏主图 ---------- */

.page-about .about-plate {
  margin: 0;
  background: var(--coal);
  position: relative;
}

.page-about .about-plate::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 31, 25, 0.42) 0%, rgba(11, 59, 46, 0.08) 46%, rgba(16, 19, 18, 0.55) 100%);
  pointer-events: none;
}

.page-about .about-plate img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(200px, 32vw, 540px);
  object-fit: cover;
  object-position: center 42%;
}

/* ---------- 章节骨架 ---------- */

.page-about .about-chapter {
  position: relative;
  padding: clamp(40px, 6.5vw, 92px) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-chapter--last {
  padding-bottom: clamp(52px, 8vw, 112px);
}

.page-about .about-chapter__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-marker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-marker::before {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  background: var(--lime);
}

.page-about .about-chapter__body {
  min-width: 0;
}

.page-about .about-chapter__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.6vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-text {
  max-width: 720px;
  margin: 0 0 16px;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--about-text);
}

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

/* ---------- 图文错位 ---------- */

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 26px;
}

.page-about .about-split__text {
  min-width: 0;
}

.page-about .about-figure {
  margin: 0;
  border: 3px solid var(--ink);
  box-shadow: 8px 8px 0 rgba(6, 31, 25, 0.75);
  background: var(--coal);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(220px, 32vw, 400px);
  object-fit: cover;
  object-position: center;
}

.page-about .about-figure figcaption {
  padding: 12px 16px;
  border-top: 2px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  color: var(--grey);
}

/* ---------- 四段阶段卡 ---------- */

.page-about .about-phases {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 28px;
}

.page-about .about-phase {
  position: relative;
  padding: clamp(20px, 2.4vw, 30px);
  border: 3px solid var(--ink);
  transition: transform 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .about-phase:hover,
.page-about .about-phase:focus-within {
  transform: translateY(-4px);
  box-shadow: 8px 8px 0 var(--ink);
}

.page-about .about-phase--paper {
  background: var(--paper);
  color: var(--ink);
  box-shadow: 5px 5px 0 var(--ink);
}

.page-about .about-phase--moss {
  background: var(--moss);
  color: var(--paper);
  box-shadow: 5px 5px 0 var(--ink);
}

.page-about .about-phase--lime {
  background: var(--lime);
  color: var(--ink);
  box-shadow: 5px 5px 0 var(--ink);
}

.page-about .about-phase__stamp {
  display: inline-block;
  margin: 0 0 16px;
  padding: 4px 10px;
  border: 2px solid currentColor;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .about-phase__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2.1vw, 24px);
  line-height: 1.3;
}

.page-about .about-phase__text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.82;
  opacity: 0.86;
}

.page-about .about-phase__anchor {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  padding-top: 14px;
  border-top: 2px dashed currentColor;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  opacity: 0.88;
}

.page-about .about-phase__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 34px);
  letter-spacing: -0.01em;
  line-height: 1;
}

/* ---------- 团队分工 ---------- */

.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--about-line);
}

.page-about .about-role {
  padding: 18px 0 18px 20px;
  border-left: 3px solid rgba(198, 255, 61, 0.28);
  border-bottom: 1px solid var(--about-line);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .about-role:hover {
  border-left-color: var(--lime);
  background: rgba(198, 255, 61, 0.05);
}

.page-about .about-role__name {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.3;
  color: var(--white);
}

.page-about .about-role__name span {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--lime);
  border: 2px solid rgba(198, 255, 61, 0.5);
  padding: 2px 8px;
}

.page-about .about-role__text {
  max-width: 60ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-text);
}

/* ---------- 维护四条 ---------- */

.page-about .about-rules {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-rule {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-rule__num {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin-top: 2px;
  background: var(--lime);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .about-rule p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-text);
}

.page-about .about-rule strong {
  color: var(--white);
  font-weight: 700;
}

/* ---------- 下一步路径 ---------- */

.page-about .about-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.page-about .about-next__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 20px;
  background: var(--coal);
  border: 3px solid var(--ink);
  border-top: 6px solid var(--lime);
  color: inherit;
  text-decoration: none;
  transition: transform 200ms var(--ease), background 200ms var(--ease);
}

.page-about .about-next__card:hover {
  transform: translateY(-4px);
  background: var(--moss);
}

.page-about .about-next__card:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-about .about-next__card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.3;
  color: var(--white);
}

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

.page-about .about-next__more {
  margin-top: auto;
  padding-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-chapter__grid {
    grid-template-columns: 104px minmax(0, 1fr);
    column-gap: 40px;
  }

  .page-about .about-chapter__grid::before {
    content: "";
    position: absolute;
    top: 2px;
    bottom: 2px;
    left: 104px;
    width: 2px;
    background: linear-gradient(180deg, var(--about-track) 0%, rgba(198, 255, 61, 0.05) 100%);
    pointer-events: none;
  }

  .page-about .about-marker {
    display: block;
    padding-right: 22px;
    padding-top: 4px;
  }

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

  .page-about .about-rules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 44px;
    align-items: start;
  }

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

@media (min-width: 1120px) {
  .page-about .about-next {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 719px) {
  .page-about .about-masthead::before {
    width: 78%;
    opacity: 0.07;
  }

  .page-about .about-figure {
    box-shadow: 5px 5px 0 rgba(6, 31, 25, 0.75);
  }

  .page-about .about-plate img {
    height: 200px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-phase,
  .page-about .about-next__card,
  .page-about .about-role,
  .page-about .breadcrumbs a {
    transition: none;
  }

  .page-about .about-phase:hover,
  .page-about .about-phase:focus-within,
  .page-about .about-next__card:hover {
    transform: none;
  }
}
<<<END>>>