.page-about {
  --ab-hair: rgba(23, 37, 43, .12);
  --ab-hair-light: rgba(247, 241, 230, .2);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .ab-wrap {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about .section {
  padding-block: clamp(2.4rem, 6vw, 4.8rem);
}

.page-about .section-head {
  max-width: 64ch;
}

.page-about .section-title {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.16;
  margin: .55rem 0 0;
}

.page-about .section .lede {
  margin-top: .9rem;
  color: var(--stone);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--abyss);
  color: var(--paper);
  padding-block: clamp(1rem, 2.6vw, 1.8rem) clamp(2.6rem, 7vw, 5.4rem);
}

.page-about .ab-hero-shape {
  position: absolute;
  z-index: -1;
  right: -22%;
  top: -34%;
  width: 82%;
  height: 168%;
  background: linear-gradient(152deg, rgba(18, 63, 87, .95), rgba(11, 42, 58, 0) 64%);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
}

.page-about .ab-hero-shape::after {
  content: "";
  position: absolute;
  left: 4%;
  bottom: 16%;
  width: 128%;
  height: 2px;
  background: linear-gradient(90deg, rgba(242, 106, 46, 0), var(--signal), rgba(242, 106, 46, 0));
  transform: rotate(-11deg);
}

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

.page-about .ab-hero .breadcrumb-item,
.page-about .ab-hero .breadcrumb-item a {
  color: rgba(247, 241, 230, .7);
}

.page-about .ab-hero-grid {
  display: grid;
  gap: clamp(1.7rem, 4vw, 3rem);
  margin-top: clamp(1.4rem, 4vw, 2.8rem);
}

.page-about .ab-hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7.4vw, 4.3rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  margin: .7rem 0 0;
}

.page-about .ab-hero-em {
  display: block;
  color: var(--signal-soft);
}

.page-about .ab-hero .lede {
  color: rgba(247, 241, 230, .84);
  max-width: 44ch;
  margin-top: 1.1rem;
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.5rem;
}

.page-about .ab-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: rgba(247, 241, 230, .16);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .ab-stat {
  background: rgba(11, 42, 58, .78);
  padding: 1rem 1.05rem 1.1rem;
}

.page-about .ab-stat dt {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .ab-stat dd {
  margin: .3rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4vw, 2.05rem);
  line-height: 1;
  color: var(--paper);
}

.page-about .ab-stat dd span {
  font-family: var(--font-body);
  font-size: .58em;
  font-weight: 500;
  margin-left: .22em;
  color: var(--mist);
}

/* ---------- 出发点 ---------- */
.page-about .ab-origin {
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-origin-grid {
  display: grid;
  gap: clamp(1.3rem, 4vw, 3rem);
}

.page-about .ab-origin-body p {
  margin: 0 0 1rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .ab-quote {
  margin: 1.5rem 0 0;
  padding: 1.1rem 1.2rem;
  background: var(--sand);
  border-left: 3px solid var(--signal);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-family: var(--font-serif);
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--abyss);
}

/* ---------- 航迹时间轴 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: clamp(1.7rem, 4vw, 2.6rem) 0 0;
  padding: 0 0 0 1.5rem;
  position: relative;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--signal), var(--clay) 58%, rgba(183, 102, 79, .22));
}

.page-about .ab-stop {
  position: relative;
  display: grid;
  gap: .5rem;
  padding-bottom: clamp(1.3rem, 3vw, 2rem);
  scroll-margin-top: 90px;
}

.page-about .ab-stop::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: .45rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--signal);
}

.page-about .ab-stop-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.55rem, 4.4vw, 2.3rem);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--abyss);
}

.page-about .ab-stop-body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.06rem;
  line-height: 1.4;
  margin: 0 0 .4rem;
}

.page-about .ab-stop-body p {
  margin: 0;
  line-height: 1.8;
  color: var(--stone);
  font-size: .96rem;
}

.page-about .ab-track-figure {
  margin: clamp(1.4rem, 4vw, 2.2rem) 0 0;
}

.page-about .ab-track-figure img,
.page-about .ab-team-figure img,
.page-about .ab-network-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about figcaption {
  margin-top: .65rem;
  font-size: .84rem;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 团队分工 ---------- */
.page-about .ab-role-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.4rem 0 0;
  padding: 0;
}

.page-about .ab-role-chips a {
  display: inline-block;
  padding: .48rem .95rem;
  border-radius: var(--radius-pill);
  background: var(--mist);
  color: var(--abyss);
  font-size: .88rem;
  line-height: 1.4;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .ab-role-chips a:hover,
.page-about .ab-role-chips a:focus-visible {
  background: var(--abyss);
  color: var(--paper);
}

.page-about .ab-team-grid {
  display: grid;
  gap: .9rem;
  margin-top: 1.5rem;
}

.page-about .ab-role-card {
  background: var(--paper-hi);
  border-left: 5px solid var(--moss);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.2rem 1.25rem;
  scroll-margin-top: 90px;
  transition: transform var(--dur) var(--ease);
}

.page-about .ab-role-card:nth-child(2) {
  border-left-color: var(--mist);
}

.page-about .ab-role-card:nth-child(3) {
  border-left-color: var(--signal);
}

.page-about .ab-role-card:nth-child(4) {
  border-left-color: var(--clay);
}

.page-about .ab-role-card:nth-child(5) {
  border-left-color: var(--abyss-700);
}

.page-about .ab-role-card:hover {
  transform: translateY(-2px);
}

.page-about .ab-role-num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--abyss);
}

.page-about .ab-role-num span {
  font-family: var(--font-body);
  font-size: .58em;
  font-weight: 500;
  margin-left: .2em;
  color: var(--stone);
}

.page-about .ab-role-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  margin: .55rem 0 .4rem;
}

.page-about .ab-role-card p:last-child {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--stone);
}

.page-about .ab-team-figure {
  margin: clamp(1.4rem, 4vw, 2rem) 0 0;
}

/* ---------- 三级审校 ---------- */
.page-about .ab-review {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-hi) 100%);
  border-block: 1px solid var(--ab-hair);
}

.page-about .ab-steps {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}

.page-about .ab-step {
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.25rem 1.45rem;
}

.page-about .ab-step--a {
  background: var(--mist);
  color: var(--abyss);
}

.page-about .ab-step--b {
  background: var(--sand);
  color: var(--abyss);
}

.page-about .ab-step--c {
  background: var(--moss);
  color: var(--paper-hi);
}

.page-about .ab-step-no {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .14em;
  opacity: .78;
}

.page-about .ab-step h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.16rem;
  margin: .5rem 0 .45rem;
}

.page-about .ab-step p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.78;
}

.page-about .ab-review-note {
  margin: 1.3rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--signal);
  font-size: .92rem;
  line-height: 1.8;
  color: var(--stone);
  max-width: 70ch;
}

/* ---------- 伙伴网络 ---------- */
.page-about .ab-network-grid {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.8rem);
}

.page-about .ab-network-copy p {
  line-height: 1.85;
  color: var(--stone);
}

.page-about .ab-network-facts {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
  display: grid;
  gap: .65rem;
}

.page-about .ab-network-facts li {
  display: flex;
  align-items: baseline;
  gap: .65rem;
  font-size: .95rem;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .ab-network-facts strong {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--clay);
  min-width: 2.6em;
}

.page-about .ab-network-honor {
  margin: 1.2rem 0 0;
  font-family: var(--font-serif);
  font-size: .96rem;
  color: var(--abyss);
}

.page-about .ab-network-figure {
  margin: 0;
}

/* ---------- 服务路径 ---------- */
.page-about .ab-path {
  background: var(--sand);
}

.page-about .ab-path-list {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: .75rem;
}

.page-about .ab-path-list li {
  position: relative;
  background: var(--paper);
  border-radius: var(--radius-md);
  border-top: 4px solid var(--signal);
  padding: 1.05rem 1rem 1.15rem;
}

.page-about .ab-path-no {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--clay);
}

.page-about .ab-path-list h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  margin: .4rem 0 .35rem;
  color: var(--abyss);
}

.page-about .ab-path-list p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 收尾 ---------- */
.page-about .ab-cta {
  background: var(--abyss-700);
  color: var(--paper);
  padding-block: clamp(2.4rem, 6vw, 4rem);
}

.page-about .ab-cta-inner {
  display: grid;
  gap: 1.5rem;
}

.page-about .ab-cta-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  line-height: 1.25;
  margin: 0 0 .8rem;
}

.page-about .ab-cta-inner p {
  margin: 0;
  max-width: 56ch;
  line-height: 1.8;
  color: rgba(247, 241, 230, .84);
  font-size: .96rem;
}

.page-about .ab-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .ab-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .ab-origin-grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .ab-stop {
    grid-template-columns: minmax(128px, 176px) minmax(0, 1fr);
    gap: 1.6rem;
    align-items: start;
  }

  .page-about .ab-network-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }

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

  .page-about .ab-cta-inner {
    grid-template-columns: minmax(0, 1.2fr) auto;
    align-items: center;
  }

  .page-about .ab-cta-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 980px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .72fr);
    align-items: end;
  }

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

  .page-about .ab-path-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-role-card,
  .page-about .ab-role-chips a {
    transition: none;
  }

  .page-about .ab-role-card:hover {
    transform: none;
  }
}
<<<END>>>