.page-about {
  --about-hair: rgba(143, 163, 181, 0.18);
  --about-hair-strong: rgba(143, 163, 181, 0.3);
  --about-glow: rgba(242, 163, 58, 0.22);
}

.page-about .breadcrumb {
  margin: 20px 0 4px;
  font-size: 13px;
  letter-spacing: 0.02em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 32px;
  align-items: center;
  padding-top: 18px;
  padding-bottom: 48px;
}

.page-about .about-hero-copy {
  max-width: 36rem;
}

.page-about .about-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-title);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(30px, 7.2vw, 56px);
  line-height: 1.1;
  color: var(--cream);
}

.page-about .hero-deck {
  margin: 0 0 26px;
  max-width: 34rem;
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.85;
  color: var(--slate);
}

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

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

.page-about .about-hero-art::before {
  content: "";
  position: absolute;
  top: 6%;
  right: 4%;
  width: 42%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, var(--about-glow), rgba(242, 163, 58, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero-art img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  border: 1px solid var(--about-hair);
  object-fit: cover;
  position: relative;
}

.page-about .about-hero-art figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding-block: 56px;
  background: linear-gradient(172deg, rgba(94, 122, 99, 0.16) 0%, rgba(11, 15, 18, 0) 64%);
}

.page-about .origin-grid {
  display: grid;
  gap: 32px;
}

.page-about .origin-copy h2 {
  margin: 12px 0 18px;
  font-family: var(--font-title);
  font-size: clamp(24px, 4.8vw, 40px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .origin-copy p {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .origin-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .origin-points li {
  background: var(--ink-800);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
}

.page-about .point-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .origin-points h3 {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-size: 17px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .origin-points p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 路线图 ---------- */
.page-about .about-route {
  padding-block: 56px;
  background: linear-gradient(184deg, rgba(42, 47, 53, 0.7) 0%, rgba(42, 47, 53, 0) 60%);
}

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

.page-about .route-tabs .tablist {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: thin;
}

.page-about .route-tabs .tab {
  flex: 0 0 auto;
  white-space: nowrap;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--about-hair-strong);
  background: rgba(20, 26, 32, 0.7);
  color: var(--slate);
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-about .route-tabs .tab:hover {
  color: var(--gold-soft);
  border-color: rgba(242, 163, 58, 0.5);
}

.page-about .route-tabs .tab[aria-selected="true"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink-900);
  font-weight: 700;
}

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

.page-about .route-stage {
  position: relative;
  margin-top: 18px;
  padding-left: 22px;
  border-left: 2px solid rgba(242, 163, 58, 0.3);
}

.page-about .route-stage::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 30px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(242, 163, 58, 0.16);
}

.page-about .route-card {
  background: var(--ink-800);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-xl);
  padding: 24px 22px;
}

.page-about .route-year {
  display: inline-block;
  margin-bottom: 12px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(59, 201, 180, 0.14);
  color: var(--jade);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-about .route-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-title);
  font-size: clamp(19px, 3vw, 24px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .route-card > p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .route-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .route-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .route-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- 团队 ---------- */
.page-about .about-crew {
  padding-block: 56px;
}

.page-about .crew-grid {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-about .crew-media {
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--about-hair);
}

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

.page-about .crew-copy h2 {
  margin: 12px 0 16px;
  font-family: var(--font-title);
  font-size: clamp(24px, 4.8vw, 40px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .crew-intro {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .crew-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .crew-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .crew-num {
  font-family: var(--font-num);
  font-size: clamp(26px, 5.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .crew-text b {
  display: block;
  margin-bottom: 5px;
  font-size: 15px;
  color: var(--cream);
}

.page-about .crew-text span {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding-block: 56px;
}

.page-about .partner-map {
  position: relative;
  margin: 28px 0 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--about-hair);
}

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

.page-about .map-dot {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 5px rgba(59, 201, 180, 0.18);
  transform: translate(-50%, -50%);
  cursor: help;
}

.page-about .map-dot:focus-visible {
  outline: 2px solid var(--gold-soft);
  outline-offset: 5px;
}

.page-about .map-dot--north { left: 56%; top: 26%; }
.page-about .map-dot--east  { left: 72%; top: 40%; }
.page-about .map-dot--west  { left: 34%; top: 58%; }

.page-about .map-tip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 12px);
  transform: translateX(-50%);
  white-space: nowrap;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--ink-900);
  border: 1px solid var(--about-hair-strong);
  color: var(--cream);
  font-size: 12px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.page-about .map-dot:hover .map-tip,
.page-about .map-dot:focus-visible .map-tip,
.page-about .map-dot:focus .map-tip {
  opacity: 1;
}

.page-about .partner-stats {
  margin-top: 22px;
  display: grid;
  gap: 14px;
}

.page-about .partner-card {
  background: var(--ink-800);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
}

.page-about .partner-card b {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-num);
  font-size: 30px;
  line-height: 1;
  color: var(--jade);
}

.page-about .partner-card span {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .partner-card--award {
  background: linear-gradient(140deg, rgba(94, 122, 99, 0.32), rgba(20, 26, 32, 0.96) 70%);
  border-color: rgba(94, 122, 99, 0.5);
}

.page-about .partner-card--award b {
  color: var(--gold-soft);
}

/* ---------- 服务节奏 ---------- */
.page-about .about-cadence {
  padding-block: 56px;
}

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

.page-about .cadence-item {
  padding: 20px 22px;
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(42, 47, 53, 0.9), rgba(20, 26, 32, 0.94));
  border-left: 3px solid var(--gold);
}

.page-about .cadence-when {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold-soft);
}

.page-about .cadence-item b {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  color: var(--cream);
}

.page-about .cadence-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  margin-top: 56px;
  margin-bottom: 72px;
}

.page-about .about-cta-inner {
  display: grid;
  gap: 20px;
  padding: 32px 24px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--about-hair);
  background: radial-gradient(120% 150% at 92% 0%, rgba(242, 163, 58, 0.22), rgba(20, 26, 32, 0.96) 62%);
}

.page-about .about-cta-inner h2 {
  margin: 0 0 10px;
  font-family: var(--font-title);
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-cta-inner p {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .origin-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .crew-grid {
    grid-template-columns: 1fr 1fr;
    gap: 42px;
    align-items: center;
  }

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

  .page-about .cadence-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .page-about .about-cta-inner {
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: 40px 36px;
  }

  .page-about .route-card {
    padding: 30px 32px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    padding-top: 34px;
    padding-bottom: 76px;
  }

  .page-about .about-origin,
  .page-about .about-route,
  .page-about .about-crew,
  .page-about .about-partners,
  .page-about .about-cadence {
    padding-block: 76px;
  }

  .page-about .crew-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
  }

  .page-about .route-tabs .tablist {
    gap: 12px;
    padding-bottom: 14px;
  }

  .page-about .route-tabs .tab {
    padding: 11px 22px;
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .route-tabs .tab,
  .page-about .map-tip {
    transition: none;
  }
}