.page-about {
  --about-rail-w: 260px;
  position: relative;
  overflow-x: hidden;
  background: var(--deep-blue);
  color: var(--moon-white);
  font-family: var(--font-body);
}

/* ===================== 布局骨架 ===================== */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 60vh;
}

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

.page-about .about-main {
  min-width: 0;
  padding: 28px 20px 96px;
}

.page-about .section-gap {
  padding-top: 64px;
}

.page-about .section-head {
  margin-bottom: 36px;
  border-left: 3px solid var(--neon-pink);
  padding-left: 16px;
}

.page-about .section-head .eyebrow {
  color: var(--volt-purple);
}

.page-about .section-head .eyebrow::before {
  width: 24px;
  height: 2px;
  background: var(--volt-purple);
}

.page-about .section-head h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 6px 0 0;
  color: var(--moon-white);
}

/* ===================== 页首 HERO ===================== */
.page-about .about-hero {
  position: relative;
  padding: 44px 0 36px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-dim);
  background:
    radial-gradient(ellipse at 85% 10%, rgba(162, 0, 255, 0.14), transparent 58%),
    radial-gradient(ellipse at 10% 95%, rgba(255, 46, 136, 0.08), transparent 46%);
}

.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist-gray);
  margin-bottom: 36px;
}

.page-about .about-breadcrumb a {
  color: var(--mist-gray);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-about .about-breadcrumb a:hover {
  color: var(--neon-pink);
}

.page-about .crumb-sep {
  color: var(--volt-purple);
}

.page-about .crumb-here {
  color: var(--moon-white);
}

.page-about .about-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--neon-pink);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-eyebrow::before {
  content: '';
  width: 34px;
  height: 2px;
  background: var(--neon-pink);
  flex-shrink: 0;
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.5rem, 9vw, 4.6rem);
  line-height: 1.08;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 22px;
  background: linear-gradient(110deg, var(--moon-white) 15%, var(--neon-pink) 85%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-hero-desc {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist-gray);
  max-width: 660px;
  margin: 0 0 28px;
}

.page-about .about-hero-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.page-about .about-hero-keywords .index-tag {
  padding: 7px 14px;
  border: 1px solid var(--border-dim);
  background: var(--panel-blue);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--moon-white);
  transition: border-color var(--transition-fast);
}

.page-about .about-hero-keywords .index-tag.is-accent {
  border-color: var(--border-glow);
  color: var(--neon-pink);
}

.page-about .about-hero-keywords .index-tag.is-accent-2 {
  border-color: rgba(162, 0, 255, 0.45);
  color: var(--volt-purple);
}

.page-about .about-hero-stats {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border-dim);
  border: 1px solid var(--border-dim);
  max-width: 720px;
}

.page-about .about-hero-stats li {
  background: var(--panel-blue);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .hs-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist-gray);
}

.page-about .hs-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--moon-white);
  line-height: 1.2;
}

/* ===================== 品牌故事 ===================== */
.page-about .story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.page-about .story-copy p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist-gray);
  margin: 0 0 16px;
}

.page-about .story-copy p strong {
  color: var(--moon-white);
  font-weight: 600;
}

.page-about .story-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border-dim);
  border: 1px solid var(--border-dim);
}

.page-about .stat-block {
  background: var(--ink-blue);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background var(--transition-fast);
}

.page-about .stat-block:hover {
  background: var(--panel-blue);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1.1;
  color: var(--neon-pink);
}

.page-about .stat-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist-gray);
  text-transform: uppercase;
}

.page-about .story-visual {
  margin: 0;
  position: relative;
}

.page-about .story-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(13, 27, 42, 0.35), transparent 30%, transparent 70%, rgba(13, 27, 42, 0.35));
  pointer-events: none;
}

.page-about .story-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 1400px;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 32px) 0, 100% 32px, 100% 100%, 32px 100%, 0 calc(100% - 32px));
}

/* ===================== 发展里程碑 ===================== */
.page-about .milestone-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

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

.page-about .timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon-pink), var(--volt-purple), rgba(0, 255, 159, 0.5));
  opacity: 0.55;
}

.page-about .timeline-item {
  position: relative;
  padding-left: 36px;
  margin-bottom: 16px;
}

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

.page-about .timeline-item details {
  background: var(--panel-blue);
  border: 1px solid var(--border-dim);
  border-left: 3px solid var(--neon-pink);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.page-about .timeline-item details[open] {
  border-color: var(--border-glow);
  background: var(--ink-blue);
}

.page-about .timeline-item summary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  user-select: none;
}

.page-about .timeline-item summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline-item summary:hover {
  background: rgba(255, 46, 136, 0.04);
}

.page-about .timeline-dot {
  position: absolute;
  left: 1px;
  top: 22px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--dark-blue);
  border: 3px solid var(--neon-pink);
  box-shadow: 0 0 14px rgba(255, 46, 136, 0.5);
  z-index: 1;
}

.page-about .timeline-year {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--neon-pink);
}

.page-about .timeline-headline {
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--moon-white);
  flex: 1;
  letter-spacing: 0.02em;
}

.page-about .timeline-toggle {
  color: var(--volt-purple);
  font-size: 1.3rem;
  line-height: 1;
  transition: transform var(--transition-fast);
}

.page-about .timeline-item details[open] .timeline-toggle {
  transform: rotate(45deg);
}

.page-about .timeline-body {
  padding: 0 16px 16px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist-gray);
}

.page-about .timeline-body p {
  margin: 0;
}

.page-about .milestone-aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
  background: var(--ink-blue);
  border: 1px solid var(--border-dim);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .milestone-aside img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 400px;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, calc(100% - 14px) 100%, 0 100%);
}

.page-about .milestone-caption {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist-gray);
  margin: 0;
}

.page-about .milestone-aside .btn {
  align-self: flex-start;
}

/* ===================== 核心能力 ===================== */
.page-about .capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .capability-card {
  position: relative;
  padding: 26px 24px;
  background: var(--ink-blue);
  border: 1px solid var(--border-dim);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
  transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.page-about .capability-card:hover {
  border-color: var(--border-glow);
  background: linear-gradient(135deg, var(--ink-blue), rgba(162, 0, 255, 0.1));
  transform: translateX(6px);
}

.page-about .capability-icon {
  width: 44px;
  height: 44px;
  color: var(--neon-pink);
  margin-bottom: 16px;
  filter: drop-shadow(0 0 8px rgba(255, 46, 136, 0.35));
}

.page-about .capability-card h3 {
  font-family: var(--font-head);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 10px;
  color: var(--moon-white);
}

.page-about .capability-card p {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist-gray);
  margin: 0;
}

/* ===================== 团队与文化 ===================== */
.page-about .team-layout {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding: 40px 0;
  background: linear-gradient(165deg, var(--ink-blue) 0%, var(--deep-blue) 100%);
  border-top: 1px solid var(--border-dim);
  border-bottom: 1px solid var(--border-dim);
  clip-path: polygon(0 3%, 100% 0, 100% 97%, 0 100%);
}

.page-about .team-layout::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--neon-pink), var(--volt-purple));
  opacity: 0.6;
}

.page-about .team-copy {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .team-copy > p {
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--mist-gray);
  margin: 0;
}

.page-about .team-copy > p strong {
  color: var(--moon-white);
  font-weight: 600;
}

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 8px;
}

.page-about .team-stat-item {
  padding: 16px;
  background: var(--panel-blue);
  border-left: 2px solid var(--volt-purple);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .team-stat-item .stat-num {
  color: var(--volt-purple);
}

.page-about .team-stat-item .stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist-gray);
  text-transform: uppercase;
}

.page-about .team-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

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

.page-about .team-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 500px;
  object-fit: cover;
  clip-path: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
}

/* ===================== 资质与荣誉 ===================== */
.page-about .honors-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .honor-card {
  perspective: 800px;
  height: 220px;
}

.page-about .honor-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform var(--transition-slow);
  transform-style: preserve-3d;
}

.page-about .honor-card:hover .honor-inner,
.page-about .honor-card:focus-within .honor-inner {
  transform: rotateY(180deg);
}

.page-about .honor-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  padding: 28px 22px;
  border: 1px solid rgba(162, 0, 255, 0.4);
  background: var(--panel-blue);
  box-shadow: inset 0 0 36px rgba(162, 0, 255, 0.07), 0 4px 20px rgba(0, 0, 0, 0.25);
  border-radius: 4px;
}

.page-about .honor-face-front h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.4;
  margin: 0;
  color: var(--moon-white);
}

.page-about .honor-symbol {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--neon-pink);
  border: 2px solid var(--neon-pink);
  box-shadow: 0 0 16px rgba(255, 46, 136, 0.3);
  background: rgba(255, 46, 136, 0.06);
}

.page-about .honor-face-back {
  transform: rotateY(180deg);
  border-color: var(--border-glow);
  background: var(--ink-blue);
  box-shadow: inset 0 0 36px rgba(255, 46, 136, 0.06), 0 4px 20px rgba(0, 0, 0, 0.25);
}

.page-about .honor-face-back p {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist-gray);
  margin: 0;
  max-width: 260px;
}

.page-about .honors-note {
  margin-top: 32px;
  padding: 18px 20px;
  background: rgba(255, 209, 102, 0.06);
  border-left: 3px solid var(--amber);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist-gray);
}

.page-about .honors-note a {
  color: var(--neon-pink);
  text-decoration: none;
  border-bottom: 1px dashed var(--neon-pink);
  transition: color var(--transition-fast);
}

.page-about .honors-note a:hover {
  color: var(--volt-purple);
  border-bottom-color: var(--volt-purple);
}

/* ===================== 按钮 ===================== */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 0;
  transition: all var(--transition-fast);
}

.page-about .btn-primary {
  background: var(--neon-pink);
  color: #fff;
  box-shadow: 0 0 16px rgba(255, 46, 136, 0.35);
}

.page-about .btn-primary:hover {
  background: transparent;
  color: var(--neon-pink);
  border-color: var(--neon-pink);
  box-shadow: 0 0 28px rgba(255, 46, 136, 0.45);
}

.page-about .btn-ghost {
  background: transparent;
  color: var(--moon-white);
  border-color: var(--border-dim);
}

.page-about .btn-ghost:hover {
  border-color: var(--neon-pink);
  color: var(--neon-pink);
  box-shadow: 0 0 20px rgba(255, 46, 136, 0.2);
}

/* ===================== 桌面端 ===================== */
@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
  }

  .page-about .about-rail {
    display: flex;
    flex-direction: column;
    gap: 28px;
    position: sticky;
    top: var(--header-h);
    height: calc(100vh - var(--header-h));
    padding: 36px 22px;
    background: linear-gradient(180deg, var(--ink-blue), var(--deep-blue));
    border-right: 1px solid var(--border-dim);
    z-index: 2;
  }

  .page-about .rail-brand {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 18px 16px;
    background: var(--dark-blue);
    border-left: 2px solid var(--neon-pink);
    clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  }

  .page-about .rail-brand-cn {
    font-family: var(--font-head);
    font-weight: 900;
    font-size: 1.3rem;
    letter-spacing: 0.1em;
    color: var(--moon-white);
    text-transform: uppercase;
  }

  .page-about .rail-brand-en {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--volt-purple);
  }

  .page-about .rail-rule {
    height: 1px;
    background: linear-gradient(90deg, var(--neon-pink), transparent);
  }

  .page-about .rail-anchor {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .page-about .rail-anchor a {
    display: block;
    padding: 10px 12px;
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.06em;
    color: var(--mist-gray);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all var(--transition-fast);
  }

  .page-about .rail-anchor a:hover {
    color: var(--moon-white);
    border-left-color: var(--neon-pink);
    background: rgba(255, 46, 136, 0.06);
  }

  .page-about .rail-note {
    margin-top: auto;
    padding: 16px;
    background: rgba(0, 255, 159, 0.04);
    border: 1px solid rgba(0, 255, 159, 0.2);
  }

  .page-about .rail-note p {
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.7;
    color: var(--mist-gray);
    margin: 10px 0 0;
  }

  .page-about .about-main {
    padding: 44px 56px 120px;
  }

  .page-about .about-hero {
    padding: 64px 0 44px;
  }

  .page-about .about-hero h1 {
    font-size: clamp(3rem, 6vw, 5rem);
  }

  .page-about .about-hero-desc {
    font-size: 1rem;
    max-width: 640px;
  }

  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .story-grid {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .story-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .milestone-layout {
    grid-template-columns: 1fr 300px;
    gap: 40px;
    align-items: start;
  }

  .page-about .milestone-aside {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .capability-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about .team-layout {
    grid-template-columns: 1fr 380px;
    gap: 48px;
    padding: 56px 40px;
    align-items: center;
    clip-path: polygon(0 4%, 100% 0, 100% 96%, 0 100%);
  }

  .page-about .team-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
  }

  .page-about .honors-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

/* ===================== 宽屏增强 ===================== */
@media (min-width: 1440px) {
  .page-about .about-main {
    max-width: 1180px;
  }

  .page-about .story-grid {
    grid-template-columns: 1.4fr 0.6fr;
  }

  .page-about .milestone-layout {
    grid-template-columns: 1fr 340px;
  }
}