.page-about {
  --about-text: rgba(232, 237, 247, .70);
  --about-text-soft: rgba(232, 237, 247, .54);
  --about-ink: #141022;
  --about-ink-soft: #4B4459;
  --about-mark: #9A4A15;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 38px) 0 clamp(44px, 7vw, 86px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(760px 460px at 88% -14%, rgba(108, 92, 231, .26), transparent 68%),
    radial-gradient(520px 380px at 4% 22%, rgba(26, 16, 51, .92), transparent 72%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .5;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: radial-gradient(72% 62% at 74% 18%, #000 0%, transparent 78%);
  mask-image: radial-gradient(72% 62% at 74% 18%, #000 0%, transparent 78%);
}

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

.page-about .hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  margin-top: clamp(22px, 3.5vw, 36px);
}

.page-about .hero-copy h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.85rem, 4.8vw, 3.1rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: .015em;
  color: var(--silver);
}

.page-about .hero-lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: var(--t-base);
  line-height: 1.9;
  color: var(--about-text);
}

.page-about .hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin: 26px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .hero-facts li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .06em;
  color: var(--rock);
}

.page-about .hero-facts li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--moss);
  box-shadow: 0 0 10px rgba(92, 124, 106, .9);
}

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

.page-about .hero-media {
  position: relative;
  margin: 0;
}

.page-about .hero-media::before {
  content: "";
  position: absolute;
  top: -10px;
  right: -10px;
  width: 76px;
  height: 76px;
  border-top: 1px solid var(--line-amber);
  border-right: 1px solid var(--line-amber);
  pointer-events: none;
}

.page-about .hero-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 2px;
}

.page-about .hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: 2px;
  background-image:
    linear-gradient(to right, rgba(232, 237, 247, .06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(232, 237, 247, .06) 1px, transparent 1px);
  background-size: 58px 58px;
}

.page-about .hero-caption {
  margin-top: 12px;
  font-size: var(--t-xs);
  letter-spacing: .12em;
  color: var(--rock);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding: clamp(46px, 7vw, 90px) 0;
}

.page-about .section-title {
  margin: 12px 0 0;
  line-height: 1.32;
  letter-spacing: .01em;
  color: var(--silver);
}

.page-about .about-head {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

/* ---------- 定位与覆盖 ---------- */
.page-about .block-split {
  display: grid;
  gap: clamp(22px, 3.5vw, 34px);
}

.page-about .block-rail .section-title {
  font-size: clamp(1.35rem, 3.4vw, 1.75rem);
}

.page-about .lead-line {
  margin: 0 0 18px;
  font-size: var(--t-lg);
  line-height: 1.7;
  color: var(--silver);
}

.page-about .body-text {
  margin: 0 0 26px;
  max-width: 42em;
  font-size: var(--t-base);
  line-height: 1.9;
  color: var(--about-text);
}

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

.page-about .cover-list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 4px;
  background: var(--void);
}

.page-about .cover-num {
  font-size: var(--t-xs);
  letter-spacing: .12em;
  color: var(--moss);
  padding-top: 4px;
}

.page-about .cover-list h3 {
  margin: 0 0 6px;
  font-size: var(--t-base);
  font-weight: 600;
  color: var(--silver);
}

.page-about .cover-list p {
  margin: 0;
  font-size: var(--t-sm);
  line-height: 1.85;
  color: var(--about-text);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--void) 0%, var(--deep) 42%, var(--void) 100%);
  border-block: 1px solid var(--line-soft);
}

.page-about .tl-banner {
  position: relative;
  margin: 0 0 clamp(28px, 4vw, 46px);
}

.page-about .tl-banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
}

.page-about .tl-banner figcaption {
  margin-top: 10px;
  font-size: var(--t-xs);
  letter-spacing: .12em;
  color: var(--rock);
}

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

.page-about .tl-item {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .tl-item:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .tl-year {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .tl-year-num {
  font-family: var(--font-mono);
  font-size: var(--t-xl);
  letter-spacing: .06em;
  color: var(--silver);
  transition: color .25s ease;
}

.page-about .tl-ver {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .1em;
  color: var(--amber);
  padding: 2px 8px;
  border: 1px solid var(--line-amber);
  border-radius: 2px;
}

.page-about .tl-node {
  display: none;
}

.page-about .tl-body h3 {
  margin: 0 0 10px;
  font-size: var(--t-lg);
  font-weight: 600;
  line-height: 1.5;
  color: var(--silver);
}

.page-about .tl-body p {
  margin: 0;
  max-width: 44em;
  font-size: var(--t-base);
  line-height: 1.9;
  color: var(--about-text);
}

.page-about .tl-item:hover .tl-year-num,
.page-about .tl-item:focus-within .tl-year-num {
  color: var(--amber);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, var(--void) 0%, var(--deep) 58%, var(--void) 100%);
}

.page-about .team-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .team-media {
  margin: 0;
}

.page-about .team-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 2px;
}

.page-about .team-media figcaption {
  margin-top: 10px;
  font-size: var(--t-xs);
  letter-spacing: .12em;
  color: var(--rock);
}

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

.page-about .team-card {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-nebula);
  border-radius: 2px;
  background: rgba(11, 21, 48, .66);
  transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  border-color: var(--line-nebula);
  border-left-color: var(--amber);
  background: rgba(26, 16, 51, .68);
  box-shadow: 0 0 26px -12px rgba(108, 92, 231, .9);
}

.page-about .team-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 8px;
}

.page-about .team-role {
  margin: 0;
  font-size: var(--t-base);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--silver);
}

.page-about .team-count {
  font-size: var(--t-xs);
  letter-spacing: .1em;
  color: var(--moss);
}

.page-about .team-duty {
  margin: 0;
  font-size: var(--t-sm);
  line-height: 1.85;
  color: var(--about-text);
}

.page-about .team-note {
  margin: 18px 0 0;
  padding: 4px 0 4px 18px;
  border-left: 1px solid var(--line-amber);
  font-size: var(--t-sm);
  line-height: 1.85;
  color: var(--about-text-soft);
}

/* ---------- 服务预约 ---------- */
.page-about .service-panel {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: clamp(24px, 3.5vw, 46px);
  padding: clamp(24px, 4vw, 48px);
  border-radius: 3px;
  background: var(--cream);
  color: var(--about-ink);
}

.page-about .service-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(20, 16, 34, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20, 16, 34, .07) 1px, transparent 1px);
  background-size: 42px 42px;
  -webkit-mask-image: radial-gradient(80% 90% at 10% 0%, #000 0%, transparent 82%);
  mask-image: radial-gradient(80% 90% at 10% 0%, #000 0%, transparent 82%);
}

.page-about .service-intro,
.page-about .service-points {
  position: relative;
  z-index: 1;
}

.page-about .service-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .16em;
  color: var(--about-mark);
}

.page-about .service-intro h2 {
  margin: 10px 0 14px;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  line-height: 1.36;
  letter-spacing: .01em;
  color: var(--about-ink);
}

.page-about .service-intro p {
  margin: 0 0 24px;
  font-size: var(--t-base);
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .service-panel .btn-primary {
  color: #0B0720;
}

.page-about .service-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .service-points li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(20, 16, 34, .14);
}

.page-about .service-points li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .sp-num {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .12em;
  color: var(--about-mark);
  padding-top: 3px;
}

.page-about .service-points h3 {
  margin: 0 0 5px;
  font-size: var(--t-base);
  font-weight: 600;
  color: var(--about-ink);
}

.page-about .service-points p {
  margin: 0;
  font-size: var(--t-sm);
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* ---------- 合作价值 ---------- */
.page-about .reasons {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .reason {
  padding: clamp(20px, 3vw, 32px);
  background: var(--void);
  transition: background .25s ease;
}

.page-about .reason:hover {
  background: rgba(11, 21, 48, .9);
}

.page-about .reason-num {
  display: block;
  margin-bottom: 14px;
  font-size: var(--t-xs);
  letter-spacing: .14em;
  color: var(--clay);
}

.page-about .reason h3 {
  margin: 0 0 8px;
  font-size: var(--t-base);
  font-weight: 600;
  color: var(--silver);
}

.page-about .reason p {
  margin: 0;
  font-size: var(--t-sm);
  line-height: 1.85;
  color: var(--about-text);
}

/* ---------- 继续了解 ---------- */
.page-about .about-next {
  padding: clamp(34px, 5vw, 62px) 0 clamp(48px, 7vw, 82px);
  border-top: 1px solid var(--line-soft);
}

.page-about .next-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .next-list li {
  background: var(--void);
}

.page-about .next-list a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 6px;
  font-size: var(--t-sm);
  line-height: 1.7;
  color: var(--silver);
  text-decoration: none;
  transition: color .2s ease;
}

.page-about .next-list a:hover,
.page-about .next-list a:focus-visible {
  color: var(--amber);
}

.page-about .next-list .mono {
  font-size: var(--t-xs);
  letter-spacing: .12em;
  color: var(--rock);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .reasons {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .next-list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 860px) {
  .page-about .tl-item {
    grid-template-columns: 112px 24px minmax(0, 1fr);
    align-items: start;
    padding: 30px 0;
  }

  .page-about .tl-node {
    display: block;
    justify-self: center;
    width: 9px;
    height: 9px;
    margin-top: 10px;
    border-radius: 50%;
    background: var(--nebula);
    box-shadow: 0 0 0 4px rgba(108, 92, 231, .14), 0 0 18px -2px rgba(108, 92, 231, .95);
    transition: transform .25s ease, background .25s ease, box-shadow .25s ease;
  }

  .page-about .tl-item::before {
    content: "";
    position: absolute;
    left: 123px;
    top: 50px;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, var(--line-nebula), var(--line-soft) 72%, transparent);
  }

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

  .page-about .tl-item:hover .tl-node,
  .page-about .tl-item:focus-within .tl-node {
    transform: scale(1.4);
    background: var(--amber);
    box-shadow: 0 0 0 4px rgba(255, 138, 61, .16), 0 0 22px -2px rgba(255, 138, 61, .95);
  }

  .page-about .tl-body {
    padding-left: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: end;
  }

  .page-about .about-head {
    grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
    grid-template-areas:
      "eyebrow lede"
      "title lede";
    column-gap: clamp(28px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-head .eyebrow {
    grid-area: eyebrow;
  }

  .page-about .about-head .section-title {
    grid-area: title;
  }

  .page-about .about-head .section-lede {
    grid-area: lede;
    align-self: end;
  }

  .page-about .block-split {
    grid-template-columns: minmax(190px, .34fr) minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 80px);
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-about .service-panel {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}