.page-about {
  --about-line: 2px solid var(--editor);
  --about-gap: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 56px;
  background:
    radial-gradient(900px 360px at 92% -12%, rgba(15, 110, 140, .14), transparent 62%),
    var(--cloud);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -110px;
  width: 280px;
  height: 280px;
  background: repeating-linear-gradient(45deg, rgba(15, 110, 140, .16) 0 5px, transparent 5px 15px);
  transform: rotate(-10deg);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-about .about-hero__aside {
  border-top: var(--about-line);
  padding-top: 14px;
}

.page-about .about-hero__year {
  font-family: var(--font-serif);
  font-size: clamp(3.2rem, 11vw, 6.5rem);
  line-height: .84;
  letter-spacing: -.045em;
  color: var(--sky);
  margin: 10px 0 8px;
}

.page-about .about-hero__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 5.2vw, 3.3rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--editor);
  margin: 0 0 18px;
}

.page-about .about-hero__lede {
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.3vw, 1.1rem);
  line-height: 1.85;
  color: var(--ink);
  max-width: 62ch;
  margin: 0;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .about-hero__stats li {
  flex: 1 1 132px;
  min-width: 0;
  padding: 14px 16px;
  background: var(--cloud);
  border: var(--about-line);
  box-shadow: var(--shadow-hard);
  display: grid;
  gap: 4px;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--sky);
}

.page-about .stat-label {
  font-size: .76rem;
  letter-spacing: .05em;
  color: var(--mist);
}

/* ---------- 通用分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: 18px;
}

.page-about .about-split__rail {
  border-top: var(--about-line);
  padding-top: 12px;
}

.page-about .about-num {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--compete);
}

.page-about .about-rail-label {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-about .about-split__body h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 3vw, 2.15rem);
  line-height: 1.24;
  letter-spacing: -.015em;
  color: var(--editor);
  margin: 0 0 14px;
}

.page-about .about-split__body p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 14px;
  max-width: 66ch;
}

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

/* ---------- 图片通用 ---------- */
.page-about .figure {
  margin: 28px 0 0;
}

.page-about .figure__media {
  background: var(--cream);
  border: var(--about-line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .figure__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .figure__caption {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--energy);
  font-size: .84rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  background: var(--cloud);
}

.page-about .about-origin__figure .figure__media {
  aspect-ratio: 16 / 9;
}

.page-about .about-origin__figure .figure__media img {
  height: 100%;
}

/* ---------- 业务版图 ---------- */
.page-about .about-scope {
  border-top: var(--about-line);
  border-bottom: var(--about-line);
}

.page-about .about-tabs {
  margin-top: 28px;
}

.page-about .about-tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 0 14px;
  margin: 0;
  border-bottom: var(--about-line);
}

.page-about .about-tabs .tabs__btn {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .05em;
  padding: 10px 16px;
  background: var(--cloud);
  color: var(--editor);
  border: var(--about-line);
  box-shadow: 3px 3px 0 rgba(27, 24, 21, .18);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-tabs .tabs__btn:hover {
  background: var(--cream);
}

.page-about .about-tabs .tabs__btn[aria-selected="true"] {
  background: var(--sky);
  color: #fff;
  border-color: var(--sky);
  box-shadow: 3px 3px 0 var(--editor);
}

.page-about .about-tabs .tabs__btn:focus-visible {
  outline: 3px solid var(--energy);
  outline-offset: 2px;
}

.page-about .about-tabs .tabs__panel {
  margin-top: 22px;
  padding: 22px 20px;
  background: var(--cloud);
  border: var(--about-line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-tabs .tabs__panel[hidden] {
  display: none;
}

.page-about .about-panel__lead {
  font-size: 1rem;
  line-height: 1.82;
  color: var(--ink);
  margin: 0 0 18px;
  max-width: 64ch;
}

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

.page-about .about-chip {
  padding: 14px 16px;
  background: var(--cream);
  border-left: 4px solid var(--sky);
  font-size: .92rem;
  line-height: 1.72;
  color: var(--ink);
}

.page-about .about-chip b {
  display: block;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--compete);
  margin-bottom: 6px;
}

.page-about .about-panel__foot {
  margin: 18px 0 0;
}

.page-about .about-panel__foot a {
  color: var(--sky);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--energy);
  padding-bottom: 2px;
}

.page-about .about-panel__foot a:hover {
  color: var(--compete);
}

/* ---------- 演进路径 ---------- */
.page-about .about-timeline {
  position: relative;
  background: var(--cloud);
  overflow: hidden;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  right: -40px;
  width: 180px;
  height: 100%;
  background: repeating-linear-gradient(-58deg, rgba(196, 61, 43, .12) 0 2px, transparent 2px 15px);
  pointer-events: none;
}

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 34px 0 0;
  padding: 0 0 0 30px;
  border-left: 2px solid var(--sky);
  display: grid;
  gap: 20px;
  max-width: 860px;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  background: var(--cream);
  border: var(--about-line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -40px;
  top: 24px;
  width: 16px;
  height: 16px;
  background: var(--neon);
  border: 2px solid var(--editor);
  border-radius: 50%;
}

.page-about .about-timeline__year {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1;
  color: var(--sky);
  letter-spacing: -.02em;
}

.page-about .about-timeline__body h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--editor);
  margin: 0 0 6px;
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--cloud);
  border-top: var(--about-line);
}

.page-about .about-team__layout {
  display: grid;
  gap: 24px;
  margin-top: 28px;
}

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

.page-about .about-team__figure .figure__media {
  aspect-ratio: 3 / 2;
}

.page-about .about-team__figure .figure__media img {
  height: 100%;
}

.page-about .about-team__panel {
  border: var(--about-line);
  background: var(--cream);
  box-shadow: var(--shadow-hard);
  padding: 18px 18px 6px;
}

.page-about .about-team__panel-title {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--compete);
  margin: 0 0 12px;
}

.page-about .about-acc {
  border-top: 1px solid rgba(27, 24, 21, .28);
  padding: 10px 0;
}

.page-about .about-acc summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .98rem;
  line-height: 1.5;
  color: var(--editor);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-acc summary::-webkit-details-marker {
  display: none;
}

.page-about .about-acc summary::before {
  content: "+";
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  background: var(--sky);
  color: #fff;
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1;
}

.page-about .about-acc[open] summary::before {
  content: "−";
}

.page-about .about-acc summary:focus-visible {
  outline: 3px solid var(--energy);
  outline-offset: 3px;
}

.page-about .about-acc p {
  margin: 10px 0 4px 30px;
  font-size: .9rem;
  line-height: 1.72;
  color: var(--ink);
}

.page-about .about-team__points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-team__points li {
  padding: 16px 18px;
  background: var(--cloud);
  border: var(--about-line);
  border-left: 6px solid var(--sky);
}

.page-about .about-team__points span {
  display: block;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .1em;
  color: var(--sky);
  margin-bottom: 6px;
}

.page-about .about-team__points p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 资质与生态 ---------- */
.page-about .about-trust {
  background: var(--space);
  color: var(--cloud);
}

.page-about .about-trust .about-split__rail {
  border-top-color: var(--cloud);
}

.page-about .about-trust .about-num {
  color: var(--neon);
}

.page-about .about-trust .about-rail-label {
  color: rgba(248, 246, 239, .72);
}

.page-about .about-trust .about-split__body h2 {
  color: var(--cloud);
}

.page-about .about-trust .about-split__body p {
  color: rgba(248, 246, 239, .84);
}

.page-about .about-trust__band {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(248, 246, 239, .28);
}

.page-about .about-trust__band li {
  padding: 18px 0;
  border-bottom: 1px solid rgba(248, 246, 239, .28);
  display: grid;
  gap: 8px;
}

.page-about .about-trust__band span {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: .08em;
  color: var(--neon);
}

.page-about .about-trust__band p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: rgba(248, 246, 239, .86);
}

.page-about .about-trust .figure {
  margin-top: 32px;
}

.page-about .about-trust .figure__media {
  border-color: rgba(248, 246, 239, .5);
  box-shadow: 5px 5px 0 rgba(199, 240, 90, .22);
}

.page-about .about-trust .figure__caption {
  color: rgba(248, 246, 239, .72);
  border-left-color: var(--neon);
}

.page-about .about-eco {
  display: grid;
  gap: 24px;
  margin-top: 34px;
}

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

.page-about .about-eco__figure .figure__media {
  aspect-ratio: 7 / 4;
}

.page-about .about-eco__figure .figure__media img {
  height: 100%;
}

.page-about .about-eco__text p {
  font-size: .98rem;
  line-height: 1.85;
  color: rgba(248, 246, 239, .86);
  margin: 0 0 16px;
}

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

/* ---------- 选择理由 ---------- */
.page-about .about-why {
  border-top: var(--about-line);
}

.page-about .about-why__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: none;
}

.page-about .about-why__list li {
  padding: 20px 18px;
  background: var(--cloud);
  border: var(--about-line);
  box-shadow: var(--shadow-hard);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-why__list li:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--editor);
}

.page-about .about-why__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .14em;
  color: #fff;
  background: var(--sky);
  padding: 3px 8px;
  margin-bottom: 10px;
}

.page-about .about-why__list h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--editor);
  margin: 0 0 8px;
}

.page-about .about-why__list p {
  margin: 0;
  font-size: .91rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-why__cta {
  margin-top: 32px;
  padding: 24px 20px;
  background: var(--space);
  border: var(--about-line);
  box-shadow: var(--shadow-hard);
  display: grid;
  gap: 16px;
}

.page-about .about-why__cta p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.55;
  color: var(--cloud);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 36px 0 68px;
  }

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

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

  .page-about .about-trust__band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-left: 1px solid rgba(248, 246, 239, .28);
  }

  .page-about .about-trust__band li {
    padding: 18px 20px;
    border-right: 1px solid rgba(248, 246, 239, .28);
  }

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

  .page-about .about-why__cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-tabs {
    margin-top: 34px;
  }

  .page-about .about-tabs .tabs__panel {
    padding: 28px 30px;
  }

  .page-about .about-timeline__list {
    padding-left: 40px;
    gap: 24px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
    padding: 20px 24px;
  }

  .page-about .about-timeline__item::before {
    left: -50px;
    top: 26px;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 28px;
    align-items: start;
    margin-top: 34px;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 36px;
    align-items: center;
    margin-top: 40px;
  }

  .page-about .about-trust__band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 38px;
  }

  .page-about .about-why__cta {
    padding: 30px 34px;
    margin-top: 38px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero h1 {
    max-width: 20ch;
  }

  .page-about .about-timeline__list {
    max-width: 880px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tabs .tabs__btn,
  .page-about .about-why__list li {
    transition: none;
  }

  .page-about .about-why__list li:hover {
    transform: none;
  }
}
<<<END>>>