.page-about {
  --about-bg: #0f0f16;
  --about-purple: #8a2be2;
  --about-electric: #00d4ff;
  --about-mint: #39ff14;
  --about-warm: #a0a0b0;
  --about-white: #f5f5fa;
  --about-glass: rgba(255, 255, 255, 0.08);
  --about-gradient: linear-gradient(135deg, #8a2be2 0%, #00d4ff 100%);
  background: var(--about-bg);
  color: var(--about-warm);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  margin-bottom: 16px;
}

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

.page-about .about-hero-left {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 640px;
  overflow: hidden;
  background: var(--about-bg);
}

.page-about .about-hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.page-about .about-hero-left::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, rgba(15, 15, 22, 0.96) 0%, rgba(15, 15, 22, 0.84) 46%, rgba(15, 15, 22, 0.6) 100%);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 660px;
  margin-left: auto;
  margin-right: auto;
  padding: 36px 24px 44px;
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--about-electric);
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--about-white);
  max-width: 11em;
}

.page-about .about-lead {
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-warm);
  max-width: 34em;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.page-about .about-timeline {
  position: relative;
  margin-top: 4px;
  padding-left: 28px;
}

.page-about .about-timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--about-electric) 0%, var(--about-purple) 55%, var(--about-mint) 100%);
  opacity: 0.6;
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 22px 18px;
}

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

.page-about .timeline-item::before {
  content: '';
  position: absolute;
  left: -21px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--about-purple);
  border: 2px solid var(--about-bg);
  box-shadow: 0 0 0 2px rgba(138, 43, 226, 0.3), 0 0 14px rgba(138, 43, 226, 0.8);
}

.page-about .timeline-item:hover::before {
  background: var(--about-electric);
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.25), 0 0 20px rgba(0, 212, 255, 0.7);
}

.page-about .timeline-marker {
  display: inline-block;
  margin-bottom: 6px;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--about-electric);
  background: rgba(138, 43, 226, 0.14);
  border: 1px solid rgba(0, 212, 255, 0.26);
  border-radius: 2px;
}

.page-about .timeline-content h3 {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 700;
  color: var(--about-white);
}

.page-about .timeline-content p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--about-warm);
  max-width: 32em;
}

.page-about .about-hero-right {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 500px;
  padding: 48px 24px;
  overflow: hidden;
  background:
    linear-gradient(rgba(0, 212, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.07) 1px, transparent 1px);
  background-size: 36px 36px;
}

.page-about .about-hero-right::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 48%, rgba(138, 43, 226, 0.22) 0%, rgba(15, 15, 22, 0) 70%);
  pointer-events: none;
}

.page-about .board-stack {
  position: relative;
  width: 100%;
  max-width: 340px;
  height: 430px;
}

.page-about .stack-card {
  position: absolute;
  left: 0;
  width: 88%;
  padding: 22px;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(15, 15, 22, 0.8);
  backdrop-filter: blur(10px);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about .stack-hot {
  top: 0;
  left: 0;
  transform: rotate(-6deg);
  z-index: 1;
  border-top: 2px solid var(--about-purple);
  box-shadow: 0 0 24px rgba(138, 43, 226, 0.2);
}

.page-about .stack-new {
  top: 104px;
  left: 6%;
  transform: rotate(3deg);
  z-index: 2;
  border-top: 2px solid var(--about-electric);
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.16);
}

.page-about .stack-classic {
  top: 208px;
  left: 12%;
  transform: rotate(-1deg);
  z-index: 3;
  border-top: 2px solid var(--about-mint);
  background: rgba(15, 15, 22, 0.9);
  box-shadow: 0 0 24px rgba(57, 255, 20, 0.1);
}

@media (hover: hover) {
  .page-about .stack-hot:hover {
    transform: rotate(-3deg) translateY(-4px);
    box-shadow: 0 0 32px rgba(138, 43, 226, 0.34);
  }

  .page-about .stack-new:hover {
    transform: rotate(1deg) translateY(-4px);
    box-shadow: 0 0 32px rgba(0, 212, 255, 0.3);
  }

  .page-about .stack-classic:hover {
    transform: rotate(0deg) translateY(-4px);
    box-shadow: 0 0 32px rgba(57, 255, 20, 0.22);
  }
}

.page-about .stack-index {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--about-electric);
}

.page-about .stack-card h3 {
  margin: 0 0 6px;
  font-size: 19px;
  font-weight: 700;
  color: var(--about-white);
}

.page-about .stack-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--about-warm);
}

.page-about .about-story {
  padding: 80px 0 40px;
  background: rgba(255, 255, 255, 0.02);
}

.page-about .story-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-about .story-copy p {
  margin: 0 0 16px;
  line-height: 1.8;
}

.page-about .story-emphasis {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
  padding: 32px;
  border-left: 3px solid var(--about-purple);
  border-radius: 0 8px 8px 0;
  background: rgba(255, 255, 255, 0.05);
}

.page-about .emphasis-quote {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--about-white);
}

.page-about .about-boards {
  position: relative;
  padding: 72px 0 56px;
  border-top: 1px solid rgba(138, 43, 226, 0.14);
  border-bottom: 1px solid rgba(138, 43, 226, 0.14);
  background: rgba(138, 43, 226, 0.03);
}

.page-about .about-boards::after {
  content: '板块';
  position: absolute;
  right: 12px;
  top: 24px;
  font-size: 84px;
  font-weight: 900;
  line-height: 1;
  color: rgba(255, 255, 255, 0.03);
  pointer-events: none;
  letter-spacing: 2px;
}

.page-about .boards-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  align-items: center;
}

.page-about .boards-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .board-detail {
  position: relative;
  padding: 24px 24px 24px 32px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-left-width: 4px;
  background: rgba(255, 255, 255, 0.04);
  margin: 0;
}

.page-about .board-detail:nth-child(1) {
  border-left-color: var(--about-purple);
}

.page-about .board-detail:nth-child(2) {
  border-left-color: var(--about-electric);
}

.page-about .board-detail:nth-child(3) {
  border-left-color: var(--about-mint);
}

.page-about .board-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 700;
  border-radius: 2px;
  letter-spacing: 0.05em;
}

.page-about .board-tag-hot {
  color: var(--about-white);
  background: rgba(138, 43, 226, 0.22);
  border: 1px solid rgba(138, 43, 226, 0.5);
}

.page-about .board-tag-new {
  color: var(--about-white);
  background: rgba(0, 212, 255, 0.14);
  border: 1px solid rgba(0, 212, 255, 0.4);
}

.page-about .board-tag-classic {
  color: var(--about-white);
  background: rgba(57, 255, 20, 0.12);
  border: 1px solid rgba(57, 255, 20, 0.4);
}

.page-about .board-detail h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--about-white);
}

.page-about .board-detail p {
  margin: 0;
  line-height: 1.7;
  color: var(--about-warm);
}

.page-about .boards-visual-wrap {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(138, 43, 226, 0.4);
  background: rgba(138, 43, 226, 0.08);
  transform: rotate(1deg);
}

.page-about .boards-visual {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .boards-footer {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .boards-footer p {
  margin: 0;
  color: var(--about-warm);
  line-height: 1.7;
  font-size: 15px;
}

.page-about .about-scale {
  position: relative;
  padding: 80px 0;
  overflow: hidden;
}

.page-about .scale-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
}

.page-about .about-scale::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 15, 22, 0.68) 0%, rgba(15, 15, 22, 0.88) 100%);
  z-index: 1;
}

.page-about .about-scale::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(0, 212, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  z-index: 1;
  pointer-events: none;
}

.page-about .about-scale .container {
  position: relative;
  z-index: 2;
}

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

.page-about .stat-card {
  padding: 30px 22px;
  text-align: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  backdrop-filter: blur(6px);
  transition: border-color 0.3s ease, background 0.3s ease;
}

.page-about .stat-card:hover {
  border-color: rgba(138, 43, 226, 0.55);
  background: rgba(138, 43, 226, 0.08);
}

.page-about .stat-num {
  display: block;
  font-size: clamp(38px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.12;
  color: var(--about-white);
  letter-spacing: 0.01em;
}

.page-about .stat-suffix {
  color: var(--about-mint);
  font-size: 0.58em;
  margin-left: 2px;
  font-weight: 900;
}

.page-about .stat-label {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  color: var(--about-warm);
  letter-spacing: 0.04em;
}

.page-about .about-team {
  padding: 80px 0 56px;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .team-card {
  position: relative;
  padding: 30px 26px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  margin: 0;
}

.page-about .team-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--about-gradient);
  opacity: 0.7;
}

.page-about .team-honor {
  border-top: 3px solid rgba(57, 255, 20, 0.55);
}

.page-about .team-index {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 30px;
  font-weight: 900;
  line-height: 1;
  color: rgba(138, 43, 226, 0.5);
}

.page-about .team-card h3 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--about-white);
}

.page-about .team-card p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-warm);
}

.page-about .team-card p:last-of-type {
  margin-bottom: 0;
}

.page-about .team-card .btn-secondary {
  margin-top: 16px;
}

.page-about .about-cta {
  padding: 60px 0;
  background: linear-gradient(135deg, rgba(138, 43, 226, 0.2) 0%, rgba(0, 212, 255, 0.2) 100%);
  border-top: 1px solid rgba(138, 43, 226, 0.3);
}

.page-about .about-cta .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  text-align: center;
}

.page-about .about-cta p {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--about-white);
}

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

.page-about .section-kicker {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--about-electric);
}

.page-about .section-head {
  margin-bottom: 44px;
}

.page-about .section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(26px, 3vw, 32px);
  font-weight: 900;
  color: var(--about-white);
  line-height: 1.3;
}

.page-about .section-sub {
  margin: 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.7;
  color: var(--about-warm);
}

@media (min-width: 640px) {
  .page-about .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .about-hero-left {
    min-height: 100vh;
  }

  .page-about .about-hero-right {
    min-height: 100vh;
    padding: 56px 40px;
  }

  .page-about .about-hero-inner {
    padding: 72px 56px;
    max-width: 680px;
  }

  .page-about .about-hero h1 {
    font-size: 44px;
  }

  .page-about .story-layout {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  }

  .page-about .boards-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  }

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

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

@media (min-width: 1200px) {
  .page-about .about-hero h1 {
    font-size: 48px;
  }

  .page-about .about-hero-inner {
    padding: 80px 64px;
  }

  .page-about .board-stack {
    transform: scale(1);
  }

  .page-about .about-story,
  .page-about .about-boards,
  .page-about .about-scale,
  .page-about .about-team {
    padding-top: 96px;
    padding-bottom: 88px;
  }
}