.page-about {
  --about-gap: 18px;
  --about-gap-lg: 34px;
  --about-num: var(--cyan);
  --about-accent: var(--clay);
  padding-bottom: 64px;
}

.page-about .shell {
  padding-left: var(--pad);
  padding-right: var(--pad);
}

.page-about .breadcrumb {
  margin: 22px 0 8px;
}

/* ---------- 首屏 ---------- */

.page-about .about-intro {
  padding-top: 30px;
  padding-bottom: 12px;
}

.page-about .about-intro-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap-lg);
  border-top: 1px solid var(--line);
  padding-top: 32px;
}

.page-about .about-intro-copy {
  position: relative;
  padding-left: 0;
}

.page-about .about-h1 {
  margin: 14px 0 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(var(--fs-28), 7.4vw, var(--fs-56));
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--star);
}

.page-about .about-intro-copy .lede {
  margin-top: 20px;
  max-width: 640px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--rock);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-facts {
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, rgba(53, 230, 210, 0.08), rgba(255, 46, 139, 0.05) 70%, transparent);
  padding: 22px 20px 6px;
  align-self: start;
}

.page-about .about-facts .mono-label {
  color: var(--cyan);
  display: block;
  margin-bottom: 14px;
}

.page-about .about-facts dl {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.page-about .about-fact {
  padding: 12px 0 14px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-fact:nth-child(odd) {
  padding-right: 14px;
  border-right: 1px solid var(--line-soft);
}

.page-about .about-fact:nth-child(even) {
  padding-left: 14px;
}

.page-about .about-fact dt {
  font-family: var(--mono);
  font-size: var(--fs-12);
  color: var(--rock);
  letter-spacing: 0.06em;
}

.page-about .about-fact dd {
  margin: 6px 0 0;
  font-size: var(--fs-16);
  color: var(--star);
}

.page-about .about-fact-num {
  font-size: var(--fs-28);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--star);
  margin-right: 4px;
}

/* ---------- 通用标题 ---------- */

.page-about .about-h2 {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(var(--fs-20), 4.6vw, var(--fs-28));
  line-height: 1.35;
  color: var(--star);
}

/* ---------- 我们做什么 ---------- */

.page-about .about-scope {
  padding: 56px 0 8px;
}

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap-lg);
}

.page-about .about-split-main .prose {
  margin-top: 22px;
}

.page-about .about-split-main .prose p {
  color: var(--rock);
  font-size: var(--fs-16);
  line-height: 1.8;
  margin: 0 0 16px;
  max-width: 640px;
}

.page-about .about-capability {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-capability li {
  border-bottom: 1px solid var(--line-soft);
  padding: 18px 0 20px;
}

.page-about .about-capability .mono-label {
  color: var(--cyan);
  display: block;
  margin-bottom: 8px;
}

.page-about .about-capability strong {
  display: block;
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--star);
  letter-spacing: -0.01em;
}

.page-about .about-capability p {
  margin: 8px 0 0;
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--rock);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  position: relative;
  margin-top: 56px;
  padding: 64px 0 60px;
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-timeline-bg {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-timeline-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  display: block;
}

.page-about .about-timeline::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(11, 18, 48, 0.9), rgba(5, 7, 15, 0.94));
  pointer-events: none;
}

.page-about .about-timeline .shell {
  position: relative;
  z-index: 2;
}

.page-about .about-timeline-head {
  max-width: 620px;
}

.page-about .about-years {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-year {
  position: relative;
  padding: 0 0 30px 42px;
}

.page-about .about-year::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 16px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

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

.page-about .about-year:last-child::before {
  display: none;
}

.page-about .about-year::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--about-accent);
  border: 1px solid var(--indigo);
}

.page-about .about-year--now::after {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 230, 210, 0.16);
}

.page-about .about-year-no {
  display: block;
  color: var(--cyan);
  letter-spacing: 0.12em;
  margin-bottom: 6px;
}

.page-about .about-year-body h3 {
  margin: 0;
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--star);
  letter-spacing: -0.01em;
}

.page-about .about-year-body p {
  margin: 8px 0 0;
  max-width: 560px;
  font-size: var(--fs-13);
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: 60px 0 8px;
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap-lg);
}

.page-about .about-team-copy .prose {
  margin-top: 20px;
}

.page-about .about-team-copy .prose p {
  margin: 0 0 16px;
  max-width: 620px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--rock);
}

.page-about .about-roles {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "name num"
    "bar bar";
  gap: 8px 12px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-role-name {
  grid-area: name;
  font-size: var(--fs-16);
  color: var(--star);
}

.page-about .about-role-num {
  grid-area: num;
  color: var(--rock);
}

.page-about .about-role-bar {
  grid-area: bar;
  display: block;
  height: 8px;
  background: rgba(124, 135, 152, 0.16);
  position: relative;
  overflow: hidden;
}

.page-about .about-role-fill {
  display: block;
  height: 100%;
  width: 0;
  transition: width 640ms var(--ease);
}

.page-about .about-role--dev .about-role-fill {
  width: 53%;
  background: var(--cyan);
}

.page-about .about-role--content .about-role-fill {
  width: 23%;
  background: var(--moss);
}

.page-about .about-role--design .about-role-fill {
  width: 12%;
  background: var(--clay);
}

.page-about .about-role--ops .about-role-fill {
  width: 11%;
  background: var(--rock);
}

.page-about .about-team-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--indigo-step);
}

.page-about .about-team-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 14 / 9;
}

.page-about .about-team-media .media-caption {
  display: block;
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: var(--fs-12);
  color: var(--rock);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 安全与资质 ---------- */

.page-about .about-security {
  padding: 60px 0 8px;
}

.page-about .about-sec-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap-lg);
  border-top: 1px solid var(--line);
  padding-top: 40px;
}

.page-about .about-sec-media {
  margin: 0;
  border: 1px solid var(--line-cyan);
  background:
    repeating-linear-gradient(0deg, rgba(124, 135, 152, 0.08) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, rgba(124, 135, 152, 0.08) 0 1px, transparent 1px 40px),
    var(--indigo-step);
}

.page-about .about-sec-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  mix-blend-mode: screen;
}

.page-about .about-sec-copy .prose {
  margin-top: 20px;
}

.page-about .about-sec-copy .prose p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--rock);
}

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

.page-about .about-checks li {
  position: relative;
  padding: 12px 0 12px 30px;
  border-bottom: 1px solid var(--line-soft);
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--star);
}

.page-about .about-checks li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 19px;
  width: 12px;
  height: 7px;
  border-left: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(-45deg);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  padding: 60px 0 8px;
}

.page-about .about-eco-lede {
  margin: 20px 0 0;
  max-width: 620px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--rock);
}

.page-about .about-eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 34px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-eco-card {
  background: var(--indigo);
  border: 0;
  padding: 24px 20px 26px;
  transition: background 240ms var(--ease), transform 240ms var(--ease);
}

.page-about .about-eco-card:hover {
  background: var(--indigo-step);
  transform: translateY(-2px);
}

.page-about .about-eco-num {
  display: block;
  font-size: var(--fs-40);
  font-family: var(--mono);
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 14px;
}

.page-about .about-eco-card h3 {
  margin: 0;
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--star);
  letter-spacing: -0.01em;
}

.page-about .about-eco-card p {
  margin: 10px 0 0;
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--rock);
}

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

/* ---------- 工作城市 ---------- */

.page-about .about-visit {
  padding: 60px 0 20px;
}

.page-about .about-visit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap-lg);
  border-top: 1px solid var(--line);
  padding-top: 40px;
}

.page-about .about-visit-grid .prose {
  margin-top: 20px;
}

.page-about .about-visit-grid .prose p {
  margin: 0;
  max-width: 620px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--rock);
}

.page-about .about-visit-side {
  align-self: start;
  border: 1px solid var(--line);
  padding: 20px 18px 22px;
  background: rgba(22, 32, 74, 0.5);
}

.page-about .about-visit-side .mono-label {
  display: block;
  color: var(--cyan);
  margin-bottom: 14px;
}

.page-about .about-city-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
}

.page-about .about-city-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: var(--fs-16);
  color: var(--star);
}

.page-about .about-city-list .mono-label {
  color: var(--rock);
  margin: 0;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-eco-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-gap: 28px;
    --about-gap-lg: 48px;
  }

  .page-about .about-intro-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: var(--about-gap-lg);
    padding-top: 44px;
  }

  .page-about .about-intro-copy {
    padding-left: 26px;
    border-left: 1px solid var(--line-cyan);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-sec-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
    align-items: start;
  }

  .page-about .about-sec-media {
    margin-top: 8px;
  }

  .page-about .about-visit-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }

  .page-about .about-years {
    margin-top: 48px;
    max-width: 760px;
  }

  .page-about .about-year {
    padding-left: 56px;
    padding-bottom: 34px;
  }

  .page-about .about-year::before {
    left: 8px;
  }

  .page-about .about-year::after {
    left: 3px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-eco-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-eco-card:nth-child(even) {
    transform: translateY(18px);
  }

  .page-about .about-eco-card:nth-child(even):hover {
    transform: translateY(16px);
  }
}

@media (max-width: 400px) {
  .page-about .about-facts dl {
    grid-template-columns: 1fr;
  }

  .page-about .about-fact:nth-child(odd) {
    padding-right: 0;
    border-right: 0;
  }

  .page-about .about-fact:nth-child(even) {
    padding-left: 0;
  }

  .page-about .about-eco-num {
    font-size: var(--fs-28);
  }
}

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