.page-about {
  --about-rail: 208px;
  --about-gap: clamp(28px, 4.5vw, 56px);
  --about-ink-soft: rgba(34, 32, 42, 0.68);
  background: var(--paper);
  color: var(--graphite);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero-sec {
  padding-top: clamp(16px, 3vw, 28px);
  padding-bottom: clamp(24px, 4vw, 48px);
  background:
    linear-gradient(160deg, rgba(107, 63, 160, 0.10), rgba(246, 239, 228, 0) 58%),
    var(--paper);
}

.page-about .about-hero {
  border-color: var(--grape);
  background:
    linear-gradient(200deg, rgba(231, 222, 244, 0.68), rgba(246, 239, 228, 0.9));
}

.page-about .about-hero .hero-frame-meta {
  align-items: center;
  gap: 14px;
  border-bottom: 1px dashed var(--hairline);
  padding-bottom: 12px;
}

.page-about .about-hero-since {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--grape);
  border: 1px solid rgba(107, 63, 160, 0.35);
  border-radius: 999px;
  padding: 3px 12px;
}

.page-about .about-hero-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 44px);
  align-items: center;
}

.page-about .about-hero-copy h1 {
  font-size: clamp(2.3rem, 6vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--grape-ink);
  margin: 0 0 18px;
}

.page-about .about-hero-lede {
  font-size: clamp(1rem, 1.55vw, 1.14rem);
  line-height: 1.85;
  color: var(--graphite);
  margin: 0 0 14px;
  max-width: 46ch;
}

.page-about .about-hero-sub {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--jing);
}

.page-about .about-hero-fig {
  margin: 0;
  position: relative;
  border: 1px solid rgba(107, 63, 160, 0.28);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--grape-deep);
}

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

.page-about .about-hero-fig::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(62, 31, 99, 0.42), rgba(20, 64, 58, 0.14) 72%);
  pointer-events: none;
}

.page-about .about-hero-fig .media-caption {
  position: relative;
  z-index: 2;
  margin: 0;
  padding: 10px 14px;
  background: rgba(34, 32, 42, 0.72);
  color: rgba(246, 239, 228, 0.9);
  font-size: 0.78rem;
  line-height: 1.6;
}

/* ---------- 主栅格 ---------- */
.page-about .about-layout-wrap {
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-rail {
  display: none;
}

.page-about .about-rail-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grape);
  margin: 0 0 10px;
  padding-left: 12px;
  border-left: 4px solid var(--grape);
  padding-top: 2px;
  padding-bottom: 2px;
}

.page-about .about-rail-nav {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--hairline);
}

.page-about .about-rail-link {
  display: block;
  padding: 9px 12px;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--about-ink-soft);
  text-decoration: none;
  border-left: 3px solid transparent;
  margin-left: -1px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-rail-link:hover {
  color: var(--grape);
  background: rgba(231, 222, 244, 0.5);
}

.page-about .about-rail-link[aria-current="true"] {
  color: var(--jing);
  border-left-color: var(--jing);
  font-weight: 700;
  background: rgba(200, 16, 46, 0.06);
}

.page-about .about-rail-note {
  margin: 18px 0 0;
  padding: 10px 12px;
  font-size: 0.74rem;
  line-height: 1.7;
  color: var(--about-ink-soft);
  border-top: 1px dashed var(--hairline);
}

/* ---------- 区块通用 ---------- */
.page-about .about-sec {
  padding: clamp(30px, 5vw, 56px) 0;
  border-top: 1px dashed var(--hairline);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-prose {
  max-width: 68ch;
}

.page-about .about-prose p {
  margin: 0 0 1.1em;
  font-size: 1.02rem;
  line-height: 1.88;
  color: var(--graphite);
}

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

.page-about .about-prose a {
  color: var(--jing);
  text-decoration: none;
  border-bottom: 2px solid rgba(200, 16, 46, 0.32);
  padding-bottom: 1px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-prose a:hover {
  border-bottom-color: var(--jing);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team-blocks {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-team-block {
  flex: 1 1 100%;
  min-width: 0;
  box-sizing: border-box;
  padding: 18px 16px 20px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(107, 63, 160, 0.16);
  border-left: 5px solid var(--grape);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-left-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-team-block:nth-child(1) { border-left-color: var(--grape); }
.page-about .about-team-block:nth-child(2) { border-left-color: var(--jing); }
.page-about .about-team-block:nth-child(3) { border-left-color: var(--gold-deep); }
.page-about .about-team-block:nth-child(4) { border-left-color: var(--ink-green); }

.page-about .about-team-block:hover,
.page-about .about-team-block:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  background: #fff;
}

.page-about .about-team-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 2.9rem);
  font-weight: 700;
  line-height: 1;
  color: var(--grape-deep);
  letter-spacing: -0.03em;
}

.page-about .about-team-role {
  margin: 8px 0 10px;
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--grape-ink);
}

.page-about .about-team-more {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.84rem;
  line-height: 1.78;
  color: var(--about-ink-soft);
}

.page-about .about-team-more li {
  position: relative;
  padding-left: 13px;
}

.page-about .about-team-more li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 5px;
  background: var(--gold);
  border-radius: 50%;
}

.page-about .about-team-foot {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 14px 18px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--grape-ink);
  background: rgba(231, 222, 244, 0.55);
  border-left: 3px solid var(--jing);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(216, 201, 163, 0.4));
}

.page-about .about-tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding-bottom: clamp(16px, 2.6vw, 26px);
}

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

.page-about .about-tl-year {
  position: relative;
  z-index: 2;
  display: block;
  width: 56px;
  padding: 5px 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--grape-ink);
  background: var(--gold);
  border: 1px solid var(--gold-deep);
  border-radius: 2px;
}

.page-about .about-tl-card {
  background: #fff;
  border: 1px solid rgba(107, 63, 160, 0.2);
  border-left: 4px solid var(--grape);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-about .about-tl-card[open] {
  border-left-color: var(--jing);
}

.page-about .about-tl-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl-head h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.5;
  color: var(--grape-ink);
}

.page-about .about-tl-hint {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--about-ink-soft);
  white-space: nowrap;
}

.page-about .about-tl-hint::before {
  content: "展开";
}

.page-about .about-tl-card[open] .about-tl-hint::before {
  content: "收起";
}

.page-about .about-tl-body {
  padding: 0 16px 16px;
  border-top: 1px dashed var(--hairline);
  padding-top: 13px;
}

.page-about .about-tl-body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* ---------- 服务覆盖（深色区） ---------- */
.page-about .about-reach {
  margin-top: clamp(24px, 4vw, 44px);
  padding: clamp(34px, 5vw, 60px) clamp(20px, 3.4vw, 40px);
  background:
    radial-gradient(circle at 84% 12%, rgba(107, 63, 160, 0.52), rgba(20, 64, 58, 0) 62%),
    linear-gradient(150deg, var(--ink-green), #0d2b27 84%);
  border-radius: var(--radius);
  color: rgba(246, 239, 228, 0.9);
}

.page-about .about-reach-head .section-title {
  color: #fff;
}

.page-about .about-reach-head .section-kicker {
  color: rgba(246, 239, 228, 0.72);
}

.page-about .about-reach-head .section-num {
  background: var(--gold);
  color: var(--grape-ink);
}

.page-about .about-reach-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 40px);
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-reach-mapwrap {
  border: 1px dashed rgba(242, 179, 61, 0.42);
  border-radius: var(--radius);
  padding: 20px 18px;
  background: rgba(255, 255, 255, 0.05);
}

.page-about .about-pointmap {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: clamp(8px, 1.6vw, 15px);
  place-items: center;
}

.page-about .about-pointmap span {
  display: block;
  width: clamp(9px, 1.6vw, 13px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(242, 179, 61, 0.16);
}

.page-about .about-pointmap span:nth-child(4n) {
  background: #fff;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.18);
}

.page-about .about-pointmap span:nth-child(9),
.page-about .about-pointmap span:nth-child(26) {
  background: var(--jing);
  box-shadow: 0 0 0 4px rgba(200, 16, 46, 0.28);
}

.page-about .about-reach-legend {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 18px 0 0;
  font-size: 0.82rem;
  line-height: 1.6;
  color: rgba(246, 239, 228, 0.82);
}

.page-about .about-legend-dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--jing);
}

.page-about .about-reach-stats {
  display: grid;
  gap: 16px;
}

.page-about .about-reach-stat {
  padding: 16px 18px;
  border-left: 3px solid var(--gold);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .about-reach-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 3.6vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-reach-label {
  display: block;
  margin: 6px 0 8px;
  font-size: 0.92rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}

.page-about .about-reach-stat p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: rgba(246, 239, 228, 0.76);
}

.page-about .about-reach-fig {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  border-color: rgba(242, 179, 61, 0.32);
}

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

.page-about .about-reach-fig .media-caption {
  margin: 0;
  padding: 10px 14px;
  font-size: 0.78rem;
  line-height: 1.6;
  color: rgba(246, 239, 228, 0.78);
  background: rgba(13, 43, 39, 0.86);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-rhythm {
  padding-top: clamp(34px, 5vw, 56px);
}

.page-about .about-rhythm-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
  align-items: start;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .about-rhythm-fig {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(107, 63, 160, 0.26);
  background: var(--grape-deep);
}

.page-about .about-rhythm-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-rhythm-fig::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(107, 63, 160, 0.14), rgba(62, 31, 99, 0.55));
  pointer-events: none;
}

.page-about .about-rhythm-fig .media-caption {
  position: relative;
  z-index: 2;
  margin: 0;
  padding: 10px 14px;
  font-size: 0.78rem;
  line-height: 1.6;
  color: rgba(246, 239, 228, 0.9);
  background: rgba(34, 32, 42, 0.7);
}

/* ---------- 合作流程 ---------- */
.page-about .about-steps {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  counter-reset: none;
}

.page-about .about-step {
  position: relative;
  padding: 18px 18px 18px 22px;
  background: #fff;
  border: 1px solid rgba(107, 63, 160, 0.16);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: linear-gradient(180deg, var(--grape), var(--grape-deep));
  border-radius: var(--radius) 0 0 var(--radius);
}

.page-about .about-step:nth-child(3)::before,
.page-about .about-step:nth-child(5)::before {
  background: linear-gradient(180deg, var(--jing), var(--jing-dark));
}

.page-about .about-step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-step-idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--grape);
  background: var(--lilac);
  padding: 3px 9px;
  border-radius: 2px;
  margin-bottom: 8px;
}

.page-about .about-step h3 {
  margin: 0 0 7px;
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--grape-ink);
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.82;
  color: var(--about-ink-soft);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  border-top: 0;
  padding-top: clamp(24px, 4vw, 40px);
}

.page-about .about-cta-panel {
  padding: clamp(26px, 4.4vw, 48px);
  background:
    linear-gradient(140deg, var(--grape-deep), var(--grape) 68%);
  border-radius: var(--radius);
  color: rgba(246, 239, 228, 0.92);
  box-shadow: var(--shadow-lift);
}

.page-about .about-cta-panel h2 {
  margin: 0 0 12px;
  font-size: clamp(1.45rem, 3vw, 2.1rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: #fff;
}

.page-about .about-cta-panel p {
  margin: 0 0 22px;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(246, 239, 228, 0.86);
  max-width: 56ch;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
}

.page-about .about-cta-panel .btn-primary {
  background: var(--gold);
  color: var(--grape-ink);
  border-color: var(--gold);
}

.page-about .about-cta-panel .btn-primary:hover {
  background: #fff;
  border-color: #fff;
}

.page-about .about-cta-alt {
  font-size: 0.88rem;
  color: rgba(246, 239, 228, 0.86);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 179, 61, 0.6);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-cta-alt:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-team-blocks {
    gap: 8px;
  }

  .page-about .about-team-block {
    flex: 0 0 auto;
    width: calc(var(--w) * 1% - 8px);
    min-width: 130px;
  }

  .page-about .about-team-block:nth-child(1) { --w: 38.9; }
  .page-about .about-team-block:nth-child(2) { --w: 30.6; }
  .page-about .about-team-block:nth-child(3) { --w: 22.2; }
  .page-about .about-team-block:nth-child(4) { --w: 8.3; min-width: 106px; }

  .page-about .about-hero-body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .about-reach-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 118px;
    align-self: start;
  }

  .page-about .about-hero-body {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .about-reach-body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-rhythm-body {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }

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

  .page-about .about-tl-item {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 22px;
  }

  .page-about .about-tl-year {
    width: 68px;
    font-size: 0.84rem;
    padding: 6px 0;
  }

  .page-about .about-timeline::before {
    left: 33px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team-block,
  .page-about .about-step,
  .page-about .about-cta-alt {
    transition: none;
  }

  .page-about .about-team-block:hover,
  .page-about .about-step:hover {
    transform: none;
  }
}