.page-about {
  background: var(--ink);
  color: var(--on-dark);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 26px 0 52px;
  overflow: hidden;
  border-bottom: 2px solid var(--ink-3);
  background:
    radial-gradient(circle at 84% 12%, rgba(43, 240, 200, 0.13), transparent 56%),
    linear-gradient(178deg, var(--ink) 0%, var(--ink-2) 92%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.45;
  background-image: radial-gradient(rgba(143, 179, 168, 0.22) 1px, transparent 1px);
  background-size: 24px 24px;
}

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

.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .crumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .crumbs__sep {
  color: var(--ink-3);
}

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

.page-about .about-kicker {
  display: inline-block;
  margin: 0 0 14px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--cyan);
  background: rgba(43, 240, 200, 0.08);
  border: 2px solid var(--ink-3);
  border-radius: var(--radius);
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.14;
  color: var(--on-dark);
}

.page-about .about-hero__text {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: 16px;
  color: var(--mist);
}

.page-about .about-hero__stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  background: var(--ink-3);
  border: 2px solid var(--ink-3);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-stat {
  display: block;
  padding: 12px 10px;
  background: var(--ink-2);
}

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

.page-about .about-stat__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 目录 + 主体 ---------- */
.page-about .about-layout {
  display: grid;
  gap: 26px;
  padding-top: 36px;
  padding-bottom: 64px;
}

.page-about .about-toc__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .about-toc__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--mist);
  text-decoration: none;
  background: var(--ink-2);
  border: 2px solid var(--ink-3);
  border-radius: var(--radius);
  transition: color var(--ease), background var(--ease), border-color var(--ease);
}

.page-about .about-toc__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-toc__link:hover {
  color: var(--on-dark);
  border-color: var(--mist);
}

.page-about .about-toc__link[aria-current="true"] {
  color: var(--on-dark);
  border-color: var(--orange);
  background: rgba(255, 106, 43, 0.12);
}

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

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  padding-bottom: 46px;
}

.page-about .about-sec + .about-sec {
  padding-top: 38px;
  border-top: 2px solid var(--ink-3);
}

.page-about .sec-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .sec-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .sec-head h2 {
  margin: 0;
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.2;
  color: var(--on-dark);
}

.page-about .about-sec__lead {
  margin: 0 0 20px;
  font-size: 16px;
  color: var(--mist);
}

.page-about .about-paper .about-sec__lead,
.page-about .about-mint .about-sec__lead {
  color: var(--muted-ink);
}

/* 图片容器 */
.page-about .frame {
  margin: 0 0 22px;
}

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

.page-about .frame__caption {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-paper .frame__caption {
  color: var(--muted-ink-2);
}

/* ---------- 分工面板 ---------- */
.page-about .roles {
  display: grid;
  gap: 18px;
}

.page-about .roles__card {
  padding: 18px 16px;
  background: var(--ink-2);
  border: 2px solid var(--ink-3);
  border-radius: var(--radius);
  box-shadow: var(--hard);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.page-about .roles__card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 0 #000000;
  border-color: var(--cyan);
}

.page-about .roles__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
}

.page-about .roles__num span {
  margin-left: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--mist);
  letter-spacing: 0.08em;
}

.page-about .roles__name {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.4;
  color: var(--on-dark);
}

.page-about .roles__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .about-slab {
  padding: 20px 16px 24px;
  background: var(--ink-2);
  border: 2px solid var(--ink-3);
  border-radius: var(--radius);
  box-shadow: var(--hard);
}

.page-about .timeline {
  list-style: none;
  position: relative;
  margin: 6px 0 0;
  padding: 0;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--beige), var(--ink-3));
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 22px 32px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--cyan);
  border: 2px solid var(--ink-2);
  border-radius: 2px;
  box-shadow: 0 0 0 2px var(--ink-3);
}

.page-about .timeline__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .timeline__body {
  padding: 12px 14px;
  background: var(--ink);
  border: 2px solid var(--ink-3);
  border-radius: var(--radius);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.page-about .timeline__item:hover .timeline__body {
  transform: translate(2px, -2px);
  border-color: var(--cyan);
  box-shadow: var(--hard-sm);
}

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

.page-about .timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .timeline__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 200, 0.5);
}

.page-about .timeline__text a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 奶油纸区块 ---------- */
.page-about .about-paper {
  padding: 22px 18px;
  background: var(--paper);
  color: var(--paper-ink);
  border: 2px solid var(--paper-ink);
  border-radius: var(--radius);
  box-shadow: var(--hard);
}

.page-about .about-paper h3 {
  color: var(--paper-ink);
}

.page-about .about-paper p {
  color: var(--muted-ink);
}

.page-about .about-paper a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 43, 0.45);
}

.page-about .about-paper a:hover {
  border-bottom-color: var(--orange);
}

.page-about .steps {
  display: grid;
  gap: 12px;
}

.page-about .steps__item {
  padding: 14px;
  background: var(--mint);
  border: 2px solid var(--paper-ink);
  border-radius: var(--radius);
}

.page-about .steps__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .steps__title {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
}

.page-about .steps__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted-ink);
}

/* ---------- 浅青区块 ---------- */
.page-about .about-mint {
  padding: 22px 18px;
  background: var(--mint);
  color: var(--paper-ink);
  border: 2px solid var(--ink-3);
  border-radius: var(--radius);
  box-shadow: var(--hard);
}

.page-about .about-mint > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted-ink);
}

.page-about .about-mint > p + p {
  margin-top: 16px;
}

.page-about .about-mint a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 43, 0.45);
}

.page-about .kpis {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 18px 0;
}

.page-about .kpis .kpi {
  padding: 12px 10px;
  background: var(--paper);
  border: 2px solid var(--paper-ink);
  border-radius: var(--radius);
}

.page-about .kpis .kpi__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.15;
  color: var(--paper-ink);
}

.page-about .kpis .kpi__label {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.5;
  color: var(--muted-ink-2);
}

/* ---------- 三栏工作方式 ---------- */
.page-about .ways {
  display: grid;
  gap: 18px;
}

.page-about .ways__item {
  padding-top: 16px;
  border-top: 2px solid var(--beige);
}

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

.page-about .ways__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .ways__title {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.4;
}

.page-about .ways__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted-ink);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  margin-top: 34px;
  padding: 22px 18px;
  background: var(--ink-2);
  border: 2px solid var(--ink-3);
  border-radius: var(--radius);
  box-shadow: var(--hard);
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 4.2vw, 30px);
  line-height: 1.25;
  color: var(--on-dark);
}

.page-about .about-cta p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 34px 0 64px;
  }

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

  .page-about .about-stat__num {
    font-size: 24px;
  }

  .page-about .about-slab,
  .page-about .about-paper,
  .page-about .about-mint,
  .page-about .about-cta {
    padding: 28px 26px;
  }

  .page-about .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

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

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

  .page-about .ways__item,
  .page-about .ways__item:first-child {
    padding: 0 22px;
    border-top: 0;
    border-left: 2px solid var(--beige);
  }

  .page-about .ways__item:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .ways__item:last-child {
    padding-right: 0;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: end;
    margin-top: 30px;
  }

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

  .page-about .about-layout {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 56px;
    padding-top: 52px;
    padding-bottom: 80px;
  }

  .page-about .about-toc {
    position: sticky;
    top: 32px;
    align-self: start;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-about .about-toc__link {
    padding: 10px 12px 10px 14px;
    background: transparent;
    border: 0;
    border-left: 3px solid transparent;
    border-radius: 0;
  }

  .page-about .about-toc__link:hover {
    background: rgba(143, 179, 168, 0.1);
    border-left-color: var(--mist);
  }

  .page-about .about-toc__link[aria-current="true"] {
    border-left-color: var(--orange);
    background: rgba(43, 240, 200, 0.08);
  }

  .page-about .roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
  }

  .page-about .roles__card:nth-child(2) {
    margin-top: 32px;
  }

  .page-about .roles__card:nth-child(3) {
    margin-top: 64px;
  }

  .page-about .timeline__item {
    padding-left: 38px;
  }
}
<<<END>>>