.page-about {
  --about-card: #FFFFFF;
  --about-body: var(--ink-700);
  --about-radius: 3px;
  background: var(--paper);
  color: var(--graphite);
}

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

.page-about .section--dark {
  background: var(--ink-900);
  color: var(--silver-300);
}

.page-about .section--dark .h-section,
.page-about .section--dark .h-sub {
  color: var(--paper);
}

.page-about .section--dark .eyebrow {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: clamp(26px, 4vw, 52px);
  padding-bottom: clamp(34px, 5vw, 68px);
  background:
    radial-gradient(115% 70% at 92% -12%, rgba(47, 216, 198, 0.16), transparent 62%),
    linear-gradient(180deg, #F6F9FC 0%, #EAF1F7 100%);
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-hero .crumbs {
  margin-bottom: clamp(18px, 3vw, 34px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-hero .h-display {
  margin: 14px 0 18px;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-hero__intro {
  margin: 0;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-jump {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px dashed var(--line-light);
}

.page-about .about-jump__label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--silver-500);
}

.page-about .about-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-jump__list a {
  display: inline-block;
  padding: 6px 13px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-800);
  background: #fff;
  border: 1px solid var(--line-light);
  border-radius: 999px;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.page-about .about-jump__list a:hover,
.page-about .about-jump__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan-deep);
  background: rgba(47, 216, 198, 0.1);
}

.page-about .about-hero__panel {
  position: relative;
  padding: 22px 22px 8px;
  background: var(--ink-900);
  color: var(--silver-300);
  border: 1px solid var(--ink-700);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-card);
}

.page-about .about-hero__panel::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(200, 212, 223, 0.1);
  border-radius: 2px;
  pointer-events: none;
}

.page-about .about-hero__panel-tag {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-vitals {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-vitals li {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px dashed var(--line-dark);
}

.page-about .about-vitals li:last-child {
  border-bottom: 0;
}

.page-about .about-vitals__num {
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.2;
}

.page-about .about-vitals__text {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--silver-300);
}

/* ---------- 三条业务线 ---------- */

.page-about .about-lines {
  padding-top: clamp(38px, 5vw, 68px);
  padding-bottom: clamp(38px, 5vw, 68px);
}

.page-about .about-lines__lede,
.page-about .about-eco__lede,
.page-about .about-cred__lede {
  max-width: 62ch;
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-lines__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 30px;
}

.page-about .line-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 20px;
  background: var(--about-card);
  border: 1px solid var(--line-light);
  border-top: 3px solid var(--ink-800);
  border-radius: var(--about-radius);
}

.page-about .line-card:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-about .line-card:nth-child(3) {
  border-top-color: var(--amber);
}

.page-about .line-card__no {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--silver-500);
}

.page-about .line-card__title {
  margin: 0;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--graphite);
}

.page-about .line-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .line-card__chip {
  margin: 0;
  padding: 7px 11px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ink-800);
  background: #EEF4F9;
  border-radius: 2px;
}

.page-about .line-card__link {
  margin-top: auto;
  padding-top: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 122, 112, 0.35);
  align-self: flex-start;
}

.page-about .line-card__link::after {
  content: " →";
}

.page-about .line-card__link:hover,
.page-about .line-card__link:focus-visible {
  color: var(--ink-900);
  border-bottom-color: var(--ink-900);
}

/* ---------- 成长轨迹 ---------- */

.page-about .about-history {
  padding-top: clamp(40px, 5vw, 72px);
  padding-bottom: clamp(40px, 5vw, 72px);
}

.page-about .about-history__lede,
.page-about .about-services__lede {
  max-width: 62ch;
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver-300);
}

.page-about .about-history__figure {
  margin: 30px 0 36px;
}

.page-about .about-history .media__frame {
  border: 1px solid var(--line-dark);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: rgba(200, 212, 223, 0.06);
}

.page-about .about-history .media__frame img,
.page-about .about-team .media__frame img,
.page-about .about-cred .media__frame img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-history .media__caption,
.page-about .about-team .media__caption,
.page-about .about-cred .media__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--silver-500);
}

.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(47, 216, 198, 0.12) 100%);
}

.page-about .tl__item {
  position: relative;
  padding-bottom: 22px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 20px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
}

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

.page-about .tl__card {
  padding: 18px 18px 16px;
  background: rgba(200, 212, 223, 0.05);
  border: 1px solid var(--line-dark);
  border-radius: var(--about-radius);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .tl__item:hover .tl__card,
.page-about .tl__item:focus-within .tl__card {
  background: rgba(47, 216, 198, 0.09);
  border-color: rgba(47, 216, 198, 0.4);
}

.page-about .tl__year {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .tl__title {
  margin: 0 0 8px;
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .tl__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--silver-300);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding-top: clamp(40px, 5vw, 72px);
  padding-bottom: clamp(40px, 5vw, 72px);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-team__copy p {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
}

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

.page-about .about-team .media__frame {
  border: 1px solid var(--line-light);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: #E9EFF5;
}

.page-about .stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-light);
  border: 1px solid var(--line-light);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .stats__cell {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 20px 18px;
  background: var(--about-card);
}

.page-about .stats__num {
  font-size: clamp(24px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink-900);
}

.page-about .stats__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver-500);
}

/* ---------- 资质 ---------- */

.page-about .about-cred {
  padding-top: clamp(40px, 5vw, 68px);
  padding-bottom: clamp(40px, 5vw, 68px);
  background: linear-gradient(180deg, #F5F8FB 0%, #EEF2F6 100%);
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-cred__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 28px;
}

.page-about .cred {
  margin-bottom: 12px;
  background: var(--about-card);
  border: 1px solid var(--line-light);
  border-left: 3px solid var(--cyan);
  border-radius: var(--about-radius);
}

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

.page-about .cred__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .cred__head::after {
  content: "＋";
  flex: 0 0 auto;
  font-size: 17px;
  line-height: 1;
  color: var(--cyan-deep);
}

.page-about .cred[open] .cred__head::after {
  content: "－";
}

.page-about .cred__stamp {
  flex: 0 0 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border: 2px solid var(--ink-800);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.04em;
  text-align: center;
  color: var(--ink-800);
}

.page-about .cred__name {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--graphite);
}

.page-about .cred__body {
  margin: 0;
  padding: 0 18px 18px 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-body);
  border-top: 1px dashed var(--line-light);
  padding-top: 14px;
}

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

.page-about .about-cred .media__frame {
  border: 1px solid var(--line-light);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--archive);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  padding-top: clamp(40px, 5vw, 68px);
  padding-bottom: clamp(40px, 5vw, 68px);
}

.page-about .flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow__step {
  position: relative;
}

.page-about .flow__link {
  display: flex;
  flex-direction: column;
  gap: 7px;
  height: 100%;
  padding: 18px 16px;
  background: var(--about-card);
  border: 1px solid var(--line-light);
  border-radius: var(--about-radius);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .flow__link:hover,
.page-about .flow__link:focus-visible {
  border-color: var(--cyan);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.page-about .flow__no {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-deep);
}

.page-about .flow__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--graphite);
}

.page-about .flow__note {
  font-size: 13px;
  line-height: 1.65;
  color: var(--silver-500);
}

.page-about .about-eco__foot {
  margin: 26px 0 0;
  padding: 16px 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
  background: #EEF4F9;
  border-left: 3px solid var(--amber);
  border-radius: 2px;
}

.page-about .about-eco__foot a {
  color: var(--cyan-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 122, 112, 0.35);
}

.page-about .about-eco__foot a:hover,
.page-about .about-eco__foot a:focus-visible {
  color: var(--ink-900);
  border-bottom-color: var(--ink-900);
}

/* ---------- 服务栏目 ---------- */

.page-about .about-services {
  padding-top: clamp(40px, 5vw, 68px);
  padding-bottom: clamp(40px, 5vw, 68px);
}

.page-about .about-services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 30px;
}

.page-about .service-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px;
  background: rgba(200, 212, 223, 0.05);
  border: 1px solid var(--line-dark);
  border-radius: var(--about-radius);
  text-decoration: none;
  color: var(--silver-300);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .service-card:hover,
.page-about .service-card:focus-visible {
  background: rgba(47, 216, 198, 0.09);
  border-color: var(--cyan);
}

.page-about .service-card__tag {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .service-card__title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .service-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver-300);
}

.page-about .service-card__go {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--cyan);
}

.page-about .service-card__go::after {
  content: " →";
}

/* ---------- 结尾 ---------- */

.page-about .about-tail {
  padding-top: clamp(36px, 4vw, 56px);
  padding-bottom: clamp(36px, 4vw, 56px);
}

.page-about .about-tail__box {
  position: relative;
  padding: clamp(24px, 4vw, 40px);
  background: var(--about-card);
  border: 1px solid var(--line-light);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-tail__box::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--neon);
}

.page-about .about-tail__box .h-sub {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--graphite);
}

.page-about .about-tail__box p {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 820px) {
  .page-about .about-lines__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-services__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 860px) {
  .page-about .tl {
    padding-left: 0;
  }

  .page-about .tl::before {
    left: 50%;
    margin-left: -1px;
  }

  .page-about .tl__item {
    width: calc(50% - 40px);
    padding-bottom: 28px;
  }

  .page-about .tl__item::before {
    top: 24px;
  }

  .page-about .tl__item:nth-child(odd) {
    margin-left: 0;
  }

  .page-about .tl__item:nth-child(odd)::before {
    left: auto;
    right: -48px;
  }

  .page-about .tl__item:nth-child(even) {
    margin-left: auto;
  }

  .page-about .tl__item:nth-child(even)::before {
    left: -48px;
  }

  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .flow__step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -7px;
    width: 9px;
    height: 1px;
    background: var(--silver-500);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.12fr 0.88fr;
    align-items: center;
    gap: 44px;
  }

  .page-about .about-cred__grid {
    grid-template-columns: 1.42fr 0.58fr;
    align-items: start;
    gap: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow__link,
  .page-about .tl__card,
  .page-about .service-card,
  .page-about .about-jump__list a {
    transition: none;
  }

  .page-about .flow__link:hover,
  .page-about .flow__link:focus-visible {
    transform: none;
  }
}
</PAGE_CSS>>>