.page-about {
  --ab-grid-line: rgba(185, 192, 199, 0.28);
  --ab-narrow: 3.6fr;
  --ab-wide: 8.4fr;
}

.page-about .ab-section-head {
  max-width: 62ch;
  margin-bottom: clamp(28px, 4vw, 48px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(92px, 13vw, 140px) 0 clamp(48px, 7vw, 84px);
  background:
    linear-gradient(180deg, var(--paper) 0%, var(--paper) 56%, var(--mist) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(660px, 78vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at 36% 36%, var(--spring-soft) 0%, rgba(240, 201, 168, 0) 68%);
  opacity: 0.62;
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line, var(--line)) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line, var(--line)) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.12;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 70%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 70%);
  pointer-events: none;
}

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

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .ab-hero__title {
  margin: 10px 0 0;
  letter-spacing: -0.03em;
}

.page-about .ab-hero__lede {
  margin-top: 18px;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-hero__aside {
  display: grid;
  gap: 20px;
}

.page-about .ab-hero__media {
  margin: 0;
  border: 1px solid var(--line);
}

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

.page-about .ab-hero__stats > .sj-stat {
  background: var(--paper);
  padding: 14px 12px;
  display: grid;
  gap: 4px;
}

.page-about .ab-hero__stats .sj-stat__value {
  font-size: 20px;
  line-height: 1.2;
}

.page-about .ab-hero__stats .sj-stat__label {
  font-size: 12px;
  color: var(--winter);
}

/* ---------- 左窄右宽画册式分栏 ---------- */
.page-about .ab-split__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .ab-split__side {
  position: relative;
  padding-left: 18px;
  border-left: 3px solid var(--spring);
}

.page-about .ab-split__quote {
  margin: 14px 0 0;
  font-size: 17px;
  color: var(--winter);
}

.page-about .ab-split__body p {
  margin: 0 0 16px;
}

.page-about .ab-split__body p:last-of-type {
  margin-bottom: 0;
}

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

/* ---------- 三条业务线 ---------- */
.page-about .ab-lines__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .ab-lines__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: clamp(20px, 3vw, 30px) clamp(18px, 3vw, 34px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--ink);
}

.page-about .ab-lines__label {
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .ab-lines__code {
  font-size: 12px;
  color: var(--line);
  letter-spacing: 0.14em;
}

.page-about .ab-lines__label .sj-subheading {
  margin: 0;
}

.page-about .ab-lines__kicker {
  margin: 0;
  font-size: 13px;
  color: var(--autumn);
  letter-spacing: 0.02em;
}

.page-about .ab-lines__body p {
  margin: 0 0 14px;
}

.page-about .ab-lines__link {
  display: inline-block;
  font-size: 14px;
  color: var(--summer);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-about .ab-lines__link:hover,
.page-about .ab-lines__link:focus-visible {
  color: var(--ink);
}

/* ---------- 季度分档 ---------- */
.page-about .ab-season__filter {
  margin-bottom: 24px;
}

.page-about .ab-season__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .ab-season__item {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 24px 20px 22px;
  background: var(--paper);
  border: 1px solid var(--line);
}

.page-about .ab-season__bar {
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 4px;
}

.page-about .ab-season__bar--spring { background: var(--spring); }
.page-about .ab-season__bar--summer { background: var(--summer); }
.page-about .ab-season__bar--autumn { background: var(--autumn); }
.page-about .ab-season__bar--winter { background: var(--winter); }

.page-about .ab-season__code {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--line);
}

.page-about .ab-season__item .sj-subheading {
  margin: 0;
}

.page-about .ab-season__text {
  margin: 0;
  font-size: 15px;
  color: var(--ink);
}

.page-about .ab-season__specs {
  margin-top: 8px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

/* ---------- 团队与质检 ---------- */
.page-about .ab-team {
  background: var(--paper);
}

.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-about .ab-team__media {
  margin: 0;
  border: 1px solid var(--line);
}

.page-about .ab-team__body > p {
  margin: 12px 0 0;
}

.page-about .ab-team__cards {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-team__card {
  background: var(--paper);
  padding: 16px 14px;
  display: grid;
  gap: 4px;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .ab-team__card:hover,
.page-about .ab-team__card:focus-within {
  background: var(--spring);
  color: var(--paper);
}

.page-about .ab-team__num {
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
}

.page-about .ab-team__name {
  font-size: 14px;
  font-weight: 600;
}

.page-about .ab-team__desc {
  font-size: 13px;
  color: var(--winter);
  transition: color var(--dur) var(--ease);
}

.page-about .ab-team__card:hover .ab-team__desc,
.page-about .ab-team__card:focus-within .ab-team__desc {
  color: rgba(244, 241, 236, 0.85);
}

.page-about .ab-team__checks {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .ab-checks__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
}

.page-about .ab-checks__item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  border-left: 2px solid var(--spring);
  padding-left: 10px;
}

.page-about .ab-checks__idx {
  font-size: 12px;
  color: var(--line);
}

.page-about .ab-team__rate {
  margin: 18px 0 0;
  font-size: 15px;
}

/* ---------- 服务覆盖 ---------- */
.page-about .ab-cover__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-about .ab-cover__body > p {
  margin: 12px 0 0;
}

.page-about .ab-cover__channels {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}

.page-about .ab-cover__ch {
  display: grid;
  gap: 3px;
  padding: 12px 12px 12px 14px;
  border-left: 2px solid var(--winter);
  background: var(--mist);
}

.page-about .ab-cover__ch .sj-mono {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.1;
}

.page-about .ab-cover__ch span:last-child {
  font-size: 13px;
  color: var(--ink);
}

.page-about .ab-cover__note {
  margin: 12px 0 18px;
}

.page-about .ab-cover__media {
  margin: 0;
  border: 1px solid var(--line);
}

/* ---------- 阶段时间轴 ---------- */
.page-about .ab-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .ab-timeline__list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg,
    var(--spring) 0%,
    var(--summer) 34%,
    var(--autumn) 68%,
    var(--winter) 100%);
}

.page-about .ab-timeline__node {
  position: relative;
  padding-bottom: 18px;
}

.page-about .ab-timeline__dot {
  position: absolute;
  left: -26px;
  top: 12px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--ink);
}

.page-about .ab-timeline__dot--spring { border-color: var(--spring); }
.page-about .ab-timeline__dot--summer { border-color: var(--summer); }
.page-about .ab-timeline__dot--autumn { border-color: var(--autumn); }

.page-about .ab-timeline__stage {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--winter);
}

.page-about .ab-timeline__q {
  font-weight: 600;
}

.page-about .ab-timeline__foot {
  margin: 22px 0 0;
}

.page-about .ab-timeline__foot a {
  color: var(--summer);
}

/* ---------- 资质与荣誉 ---------- */
.page-about .ab-honor {
  background: var(--paper);
}

.page-about .ab-honor__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .ab-honor__side {
  padding-left: 18px;
  border-left: 3px solid var(--wheat);
}

.page-about .ab-honor__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-honor__item {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-honor__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .ab-honor__item p {
  margin: 0;
}

.page-about .ab-honor__note {
  margin: 20px 0 0;
}

/* ---------- 联系入口 ---------- */
.page-about .ab-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: end;
}

.page-about .ab-cta .sj-heading {
  margin: 10px 0 0;
}

.page-about .ab-cta__lead p:last-child {
  margin: 16px 0 0;
  max-width: 58ch;
}

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

.page-about .ab-cta .sj-btn--primary {
  background: var(--spring);
  border-color: var(--spring);
  color: var(--paper);
}

.page-about .ab-cta .sj-btn--primary:hover,
.page-about .ab-cta .sj-btn--primary:focus-visible {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink);
}

.page-about .ab-cta .sj-btn--outline {
  border-color: var(--mist);
  color: var(--paper);
}

.page-about .ab-cta .sj-btn--outline:hover,
.page-about .ab-cta .sj-btn--outline:focus-visible {
  background: var(--mist);
  color: var(--ink);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .ab-lines__item {
    grid-template-columns: minmax(160px, 3fr) minmax(0, 7fr);
    gap: 28px;
    align-items: start;
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: end;
  }

  .page-about .ab-split__grid {
    grid-template-columns: minmax(190px, var(--ab-narrow)) minmax(0, var(--ab-wide));
    gap: clamp(36px, 6vw, 88px);
    align-items: start;
  }

  .page-about .ab-lines__item:nth-child(1) { max-width: 100%; }
  .page-about .ab-lines__item:nth-child(2) { max-width: 88%; }
  .page-about .ab-lines__item:nth-child(3) { max-width: 76%; }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .ab-cover__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: center;
  }

  .page-about .ab-honor__grid {
    grid-template-columns: minmax(190px, 3.4fr) minmax(0, 8.6fr);
    gap: clamp(36px, 6vw, 88px);
    align-items: start;
  }

  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 40px;
  }

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

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

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

@media (min-width: 1200px) {
  .page-about .ab-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-team__card,
  .page-about .ab-team__desc {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --grid-line: transparent;
}