.page-about {
  --about-hair: rgba(53, 224, 230, 0.16);
  --about-hair-warm: rgba(232, 183, 92, 0.32);
  position: relative;
  overflow-x: hidden;
  background-color: var(--ink-900);
  background-image:
    linear-gradient(rgba(53, 224, 230, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 224, 230, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  color: var(--paper);
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: clamp(20px, 4vw, 44px) 0 clamp(40px, 6vw, 80px);
}

.page-about .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
  font-size: 13px;
  color: var(--slate-400);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 44px);
  align-items: start;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 6.4vw, 72px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--pure-white);
  text-wrap: balance;
}

.page-about .about-hero .lede {
  margin-top: 20px;
  max-width: 56ch;
  font-size: clamp(16px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.86;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__panel {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, rgba(13, 23, 48, 0.94), rgba(7, 14, 28, 0.88));
  box-shadow: var(--shadow-lift);
}

.page-about .hero-facts {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .hero-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--ink-700);
}

.page-about .hero-facts li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .hero-facts__key {
  font-size: 14px;
  color: var(--slate-400);
}

.page-about .hero-facts__val {
  font-size: 15px;
  color: var(--electric-cyan);
  letter-spacing: 0.02em;
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  padding: clamp(48px, 7vw, 96px) 0 clamp(40px, 5vw, 72px);
  border-top: 1px solid var(--ink-700);
}

.page-about .about-timeline__head {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-timeline__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .rail-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--warm-gold);
  text-transform: uppercase;
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--ink-700);
  border-radius: var(--r-pill);
  color: var(--slate-400);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--paper);
  border-color: var(--electric-cyan);
  background: rgba(53, 224, 230, 0.08);
}

.page-about .rail-year {
  font-size: 13px;
  color: var(--warm-gold);
}

.page-about .rail-label {
  font-size: 13px;
}

.page-about .about-timeline__body {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  min-width: 0;
}

.page-about .era {
  position: relative;
  padding: clamp(22px, 3.2vw, 36px);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, rgba(13, 23, 48, 0.9), rgba(7, 14, 28, 0.72));
  min-width: 0;
}

.page-about .era::before {
  content: "";
  position: absolute;
  left: 0;
  top: clamp(22px, 3.2vw, 36px);
  width: 3px;
  height: 34px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--neon-orange), var(--electric-cyan));
}

.page-about .era-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .era-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--pure-white);
}

.page-about .era p {
  margin: 0 0 1em;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.82;
}

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

.page-about .era-figure {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--ink-700);
}

.page-about .era-figure img,
.page-about .rhythm-media img,
.page-about .flow-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 横向数据带 ---------- */

.page-about .about-band {
  margin: clamp(8px, 2vw, 18px) 0 clamp(40px, 6vw, 78px);
  padding: clamp(24px, 3.4vw, 40px) 0;
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
  background: linear-gradient(90deg, rgba(255, 106, 43, 0.07), rgba(53, 224, 230, 0.07));
}

.page-about .band-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 32px);
}

.page-about .band-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .band-num {
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: 700;
  line-height: 1;
  color: var(--electric-cyan);
}

.page-about .band-label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  opacity: 0.74;
}

/* ---------- 栏目地图 ---------- */

.page-about .about-map {
  padding: 0 0 clamp(48px, 7vw, 96px);
}

.page-about .map-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .map-card {
  display: block;
  padding: clamp(20px, 2.8vw, 30px);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-lg);
  background: rgba(13, 23, 48, 0.62);
  color: inherit;
  text-decoration: none;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .map-card:hover,
.page-about .map-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--electric-cyan);
  background: rgba(13, 23, 48, 0.92);
}

.page-about .map-card__kicker {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--warm-gold);
}

.page-about .map-card__title {
  margin: 10px 0 8px;
  font-size: clamp(18px, 2vw, 21px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--pure-white);
}

.page-about .map-card__text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.76;
}

.page-about .map-card__go {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--neon-orange);
}

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

/* ---------- 三步流程 ---------- */

.page-about .about-flow {
  padding: clamp(44px, 6.5vw, 92px) 0;
  border-top: 1px solid var(--ink-700);
  background: linear-gradient(180deg, rgba(13, 23, 48, 0.5), rgba(7, 14, 28, 0));
}

.page-about .flow-track {
  list-style: none;
  margin: 0 0 clamp(22px, 3vw, 34px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .flow-track__seg {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 16px;
  border: 1px dashed var(--about-hair);
  border-radius: var(--r-pill);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--slate-400);
}

.page-about .flow-track__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-orange);
  box-shadow: 0 0 0 3px rgba(255, 106, 43, 0.18);
}

.page-about .flow-track__seg:nth-child(2) .flow-track__dot {
  background: var(--electric-cyan);
  box-shadow: 0 0 0 3px rgba(53, 224, 230, 0.18);
}

.page-about .flow-track__seg:nth-child(3) .flow-track__dot {
  background: var(--warm-gold);
  box-shadow: 0 0 0 3px rgba(232, 183, 92, 0.18);
}

.page-about .flow-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

.page-about .flow-main {
  min-width: 0;
}

.page-about .tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-about .tab {
  appearance: none;
  border: 1px solid var(--ink-700);
  border-radius: var(--r-pill);
  background: rgba(13, 23, 48, 0.7);
  color: var(--slate-400);
  font: inherit;
  font-size: 14px;
  padding: 11px 18px;
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .tab:hover {
  color: var(--paper);
  border-color: var(--electric-cyan);
}

.page-about .tab:focus-visible {
  outline: 2px solid var(--electric-cyan);
  outline-offset: 2px;
}

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

.page-about .flow-panel {
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--electric-cyan);
  border-radius: var(--r-lg);
  background: rgba(13, 23, 48, 0.66);
}

.page-about .flow-panel__title {
  margin: 0 0 14px;
  font-size: clamp(19px, 2.2vw, 23px);
  font-weight: 800;
  color: var(--pure-white);
}

.page-about .flow-panel p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.82;
}

.page-about .flow-outcome {
  margin: 0 !important;
  padding-top: 16px;
  border-top: 1px dashed var(--ink-700);
  font-size: 15px !important;
  color: var(--mint-signal) !important;
  opacity: 1 !important;
}

.page-about .flow-outcome .mono {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 10px;
  border-radius: var(--r-pill);
  background: rgba(124, 227, 168, 0.14);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mint-signal);
}

.page-about .flow-media {
  margin: 0;
  min-width: 0;
}

.page-about .flow-media .media {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px dashed var(--about-hair);
  padding: 10px;
  background: rgba(13, 23, 48, 0.5);
}

.page-about .flow-media img {
  border-radius: var(--r-md);
}

/* ---------- 团队分工 ---------- */

.page-about .about-team {
  padding: clamp(44px, 6.5vw, 92px) 0;
  border-top: 1px solid var(--ink-700);
}

.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .team-copy {
  min-width: 0;
}

.page-about .team-copy .section-title {
  margin: 12px 0 20px;
}

.page-about .team-copy p {
  margin: 0 0 1em;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.82;
}

.page-about .team-facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .team-facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--r-md);
  background: rgba(13, 23, 48, 0.72);
  border: 1px solid var(--ink-700);
  font-size: 15px;
  color: var(--paper);
  opacity: 0.9;
}

.page-about .team-facts .mono {
  font-size: 17px;
  color: var(--electric-cyan);
  min-width: 3ch;
}

.page-about .team-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  counter-reset: teamstep;
  min-width: 0;
}

.page-about .team-flow__item {
  position: relative;
  padding: 18px 20px 18px 64px;
  border-radius: var(--r-md);
  background: linear-gradient(90deg, rgba(13, 23, 48, 0.86), rgba(7, 14, 28, 0.5));
  border: 1px solid var(--ink-700);
}

.page-about .team-flow__item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--pure-white);
}

.page-about .team-flow__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper);
  opacity: 0.76;
}

.page-about .team-flow__idx {
  position: absolute;
  left: 20px;
  top: 18px;
  font-size: 14px;
  color: var(--warm-gold);
}

/* ---------- 更新节奏 ---------- */

.page-about .about-rhythm {
  padding: clamp(44px, 6.5vw, 92px) 0;
  border-top: 1px solid var(--ink-700);
  background: linear-gradient(180deg, rgba(53, 224, 230, 0.05), rgba(7, 14, 28, 0));
}

.page-about .rhythm-media {
  margin: 0 0 clamp(28px, 4vw, 46px);
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--ink-700);
}

.page-about .rhythm-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .rhythm-card {
  padding: clamp(20px, 2.8vw, 30px);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-lg);
  background: rgba(13, 23, 48, 0.6);
  min-width: 0;
}

.page-about .rhythm-card__num {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  background: rgba(232, 183, 92, 0.14);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--warm-gold);
}

.page-about .rhythm-card h3 {
  margin: 0 0 10px;
  font-size: clamp(18px, 2vw, 21px);
  font-weight: 800;
  color: var(--pure-white);
}

.page-about .rhythm-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.78;
}

/* ---------- 用户反馈 ---------- */

.page-about .about-proof {
  padding: clamp(44px, 6.5vw, 92px) 0;
  border-top: 1px solid var(--ink-700);
}

.page-about .proof-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .proof-copy {
  min-width: 0;
}

.page-about .proof-copy .section-title {
  margin: 12px 0 20px;
}

.page-about .proof-copy p {
  margin: 0 0 1em;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.82;
}

.page-about .proof-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 22px;
}

.page-about .proof-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 20px);
}

.page-about .proof-stat {
  padding: clamp(18px, 2.4vw, 24px);
  border-radius: var(--r-lg);
  border: 1px solid var(--ink-700);
  background: linear-gradient(160deg, rgba(13, 23, 48, 0.9), rgba(7, 14, 28, 0.6));
  min-width: 0;
}

.page-about .proof-stat__num {
  display: block;
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--electric-cyan);
}

.page-about .proof-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate-400);
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  padding: 0 0 clamp(56px, 8vw, 110px);
}

.page-about .cta-shell {
  padding: clamp(28px, 4.4vw, 56px);
  border-radius: var(--r-xl);
  background:
    radial-gradient(circle at 88% 12%, rgba(255, 106, 43, 0.18), transparent 58%),
    linear-gradient(150deg, rgba(13, 23, 48, 0.96), rgba(7, 14, 28, 0.9));
}

.page-about .cta-title {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 40px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--pure-white);
}

.page-about .cta-text {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.8;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .band-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .map-card--wide {
    grid-column: span 2;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-timeline__layout {
    grid-template-columns: 172px minmax(0, 1fr);
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    align-self: start;
  }

  .page-about .rail-list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .rail-link {
    width: 100%;
    border-radius: var(--r-md);
    border-color: transparent;
    border-left: 2px solid var(--ink-700);
  }

  .page-about .team-layout,
  .page-about .proof-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 1000px) {
  .page-about .flow-shell {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .map-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .map-card {
    grid-column: span 2;
  }

  .page-about .map-card--wide {
    grid-column: span 3;
  }

  .page-about .map-card:nth-child(4),
  .page-about .map-card:nth-child(5) {
    grid-column: span 3;
  }

  .page-about .rhythm-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .map-card,
  .page-about .rail-link,
  .page-about .tab {
    transition: none;
  }

  .page-about .map-card:hover {
    transform: none;
  }
}