.page-about {
  --about-cyan: var(--ng-accent-cyan);
  --about-gold: var(--ng-accent-gold);
  --about-orange: var(--ng-accent-orange);
  --about-card: var(--ng-bg-card);
  --about-border: var(--ng-border);
  --about-text-dim: var(--ng-text-secondary);
  --about-radius: 20px;
  color: var(--ng-text-primary);
  background: var(--ng-bg-body);
  overflow-x: hidden;
}

/* ===== Hero 首屏 ===== */
.page-about .about-hero {
  position: relative;
  padding: 120px 0 60px;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 0%, rgba(255, 169, 64, 0.06) 0%, transparent 40%),
    var(--ng-bg-deep);
  border-bottom: 1px solid var(--about-border);
}

.page-about .hero-inner {
  width: min(1280px, 100% - 48px);
  margin-inline: auto;
}

.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 32px;
  font-size: 0.9rem;
  color: var(--about-text-dim);
}

.page-about .crumbs a {
  color: var(--about-text-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .crumbs a:hover {
  color: var(--about-cyan);
}

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

.page-about .crumb-current {
  color: var(--ng-text-primary);
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

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

.page-about .hero-title {
  font-family: var(--ng-font-head);
  font-size: clamp(3rem, 10vw, 6.5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  text-transform: uppercase;
}

.page-about .hero-title::after {
  content: "";
  display: block;
  width: 120px;
  height: 4px;
  margin-top: 20px;
  background: linear-gradient(90deg, var(--about-cyan), var(--about-gold));
}

.page-about .hero-subtitle {
  font-family: var(--ng-font-num);
  font-size: 1.25rem;
  color: var(--about-gold);
  margin: 0 0 20px;
  letter-spacing: 0.02em;
}

.page-about .hero-desc {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-text-dim);
  max-width: 560px;
  margin: 0 0 32px;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-about .hero-media {
  position: relative;
  display: flex;
  justify-content: center;
}

.page-about .hero-frame {
  width: 100%;
  max-width: 440px;
  aspect-ratio: 2 / 3;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--about-border);
  box-shadow: var(--ng-shadow);
}

.page-about .hero-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .hero-float-card {
  position: absolute;
  bottom: 24px;
  right: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px 24px;
  background: rgba(21, 27, 50, 0.85);
  backdrop-filter: blur(6px);
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  box-shadow: var(--ng-shadow-sm);
}

.page-about .float-num {
  font-family: var(--ng-font-num);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--about-gold);
  line-height: 1;
}

.page-about .float-label {
  font-size: 0.75rem;
  color: var(--about-text-dim);
  margin-top: 4px;
  white-space: nowrap;
}

/* ===== 通用章节 ===== */
.page-about .about-section {
  position: relative;
  padding: 80px 0;
}

.page-about .about-section .container {
  width: min(1280px, 100% - 48px);
  margin-inline: auto;
  position: relative;
}

.page-about .section-heading {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .section-heading h2 {
  font-family: var(--ng-font-head);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.02em;
}

.page-about .num-index {
  font-family: var(--ng-font-num);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--about-cyan);
  border: 1px solid var(--about-border);
  padding: 6px 10px;
  border-radius: 6px;
  background: rgba(0, 212, 255, 0.04);
}

.page-about .section-intro {
  max-width: 720px;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-text-dim);
  margin-bottom: 40px;
}

.page-about .ghost-num {
  position: absolute;
  top: -24px;
  right: -12px;
  font-family: var(--ng-font-head);
  font-size: 10rem;
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 212, 255, 0.1);
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

.page-about .ghost-num-right {
  left: auto;
  right: -12px;
}

/* ===== 品牌摘要 ===== */
.page-about .summary-section {
  border-bottom: 1px solid var(--about-border);
}

.page-about .summary-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-top: 32px;
  position: relative;
  z-index: 1;
}

.page-about .summary-lead {
  font-family: var(--ng-font-head);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 500;
  line-height: 1.5;
}

.page-about .summary-lead p {
  margin: 0;
}

.page-about .summary-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .fact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .fact-item:hover {
  transform: translateY(-2px);
  border-color: var(--about-cyan);
}

.page-about .fact-index {
  font-family: var(--ng-font-num);
  font-size: 0.8rem;
  color: var(--about-gold);
  border: 1px solid var(--about-border);
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

.page-about .fact-item p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--about-text-dim);
}

/* ===== 发展历程时间线 ===== */
.page-about .timeline-section {
  background:
    linear-gradient(180deg, transparent 0%, rgba(11, 14, 35, 0.6) 100%),
    var(--ng-bg-body);
}

.page-about .timeline-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  margin-top: 32px;
  position: relative;
  z-index: 1;
}

.page-about .timeline-media {
  display: none;
}

.page-about .timeline-media .media-frame {
  position: sticky;
  top: 120px;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--about-border);
  box-shadow: var(--ng-shadow);
}

.page-about .timeline-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  aspect-ratio: 16/9;
}

.page-about .timeline-list {
  position: relative;
  padding-left: 24px;
}

.page-about .timeline-list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--about-cyan), var(--about-gold), transparent);
}

.page-about .timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.page-about .timeline-marker {
  position: absolute;
  left: -23px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--about-card);
  border: 3px solid var(--about-cyan);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.4);
}

.page-about .timeline-card {
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  padding: 24px;
  box-shadow: var(--ng-shadow-sm);
}

.page-about .timeline-year {
  font-family: var(--ng-font-num);
  font-size: 0.85rem;
  color: var(--about-gold);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  font-weight: 500;
}

.page-about .timeline-card h3 {
  font-family: var(--ng-font-head);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 12px;
}

.page-about .timeline-card > p {
  margin: 0 0 16px;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--about-text-dim);
}

.page-about .collapse-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--about-cyan);
  background: transparent;
  border: 1px solid var(--about-border);
  border-radius: 6px;
  padding: 8px 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--ng-font-body);
}

.page-about .collapse-trigger:hover {
  border-color: var(--about-cyan);
  background: rgba(0, 212, 255, 0.06);
}

.page-about .collapse-trigger[aria-expanded="true"] .settings-chevron {
  transform: rotate(180deg);
}

.page-about .settings-chevron {
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.2s ease;
  margin-top: -2px;
}

.page-about .collapse-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.page-about .collapse-panel[data-open="true"] {
  grid-template-rows: 1fr;
}

.page-about .collapse-panel > p {
  overflow: hidden;
  margin: 0;
  padding-top: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--about-text-dim);
  border-top: 1px solid transparent;
}

.page-about .collapse-panel[data-open="true"] > p {
  padding-top: 12px;
  margin-top: 12px;
  border-top-color: var(--about-border);
}

/* ===== 内容生态模型 ===== */
.page-about .ecosystem-section {
  border-top: 1px solid var(--about-border);
  border-bottom: 1px solid var(--about-border);
  background:
    radial-gradient(ellipse at 100% 50%, rgba(255, 169, 64, 0.05) 0%, transparent 40%),
    var(--ng-bg-body);
}

.page-about .ecosystem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 48px;
  position: relative;
  z-index: 1;
}

.page-about .eco-card {
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.page-about .eco-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, transparent 50%, rgba(0, 212, 255, 0.05) 50%);
}

.page-about .eco-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 255, 0.08);
  color: var(--about-cyan);
  margin-bottom: 16px;
}

.page-about .eco-icon svg {
  width: 26px;
  height: 26px;
}

.page-about .eco-card h3 {
  font-family: var(--ng-font-head);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 10px;
}

.page-about .eco-card p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--about-text-dim);
  margin: 0 0 16px;
  min-height: 72px;
}

.page-about .tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .label-tag {
  font-size: 0.75rem;
  color: var(--about-text-dim);
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--about-border);
  padding: 4px 10px;
  border-radius: 4px;
  display: inline-block;
}

.page-about .eco-metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 32px 20px;
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  position: relative;
  z-index: 1;
}

.page-about .metric-block {
  display: flex;
  align-items: center;
  gap: 20px;
}

.page-about .metric-ring {
  position: relative;
  width: 96px;
  height: 96px;
  flex-shrink: 0;
}

.page-about .metric-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.page-about .metric-ring .ring-bg {
  fill: none;
  stroke: var(--about-border);
  stroke-width: 8;
}

.page-about .metric-ring .ring-fg {
  fill: none;
  stroke: url(#metricGrad);
  stroke: var(--about-gold);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 326;
  stroke-dashoffset: calc(326 - 326 * var(--ring-val) / 100);
}

.page-about .metric-num {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ng-font-num);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ng-text-primary);
}

.page-about .metric-block p {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--about-text-dim);
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .metric-block p .metric-unit {
  font-family: var(--ng-font-num);
  font-size: 0.75rem;
  color: var(--about-gold);
}

/* ===== 厂商合作网络 ===== */
.page-about .partners-section {
  border-bottom: 1px solid var(--about-border);
}

.page-about .partner-overview {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 48px;
  position: relative;
  z-index: 1;
}

.page-about .partner-number {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
  text-align: center;
}

.page-about .partner-count {
  font-family: var(--ng-font-num);
  font-size: 5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--about-gold);
}

.page-about .partner-label {
  font-size: 1rem;
  color: var(--ng-text-primary);
  margin: 8px 0 4px;
}

.page-about .partner-growth {
  font-family: var(--ng-font-num);
  font-size: 0.8rem;
  color: var(--about-text-dim);
}

.page-about .partner-categories h3,
.page-about .cooperation-modes h3 {
  font-family: var(--ng-font-head);
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0 0 20px;
}

.page-about .category-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .category-list li {
  display: grid;
  grid-template-columns: 80px 1fr 48px;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.page-about .cat-name {
  color: var(--ng-text-primary);
}

.page-about .cat-bar {
  height: 8px;
  background: var(--about-border);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .cat-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--about-cyan), var(--about-gold));
  border-radius: 4px;
}

.page-about .cat-num {
  font-family: var(--ng-font-num);
  font-size: 0.85rem;
  color: var(--about-text-dim);
  text-align: right;
}

.page-about .card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .mode-card {
  padding: 20px;
  position: relative;
}

.page-about .mode-index {
  font-family: var(--ng-font-num);
  font-size: 0.75rem;
  color: var(--about-cyan);
  border: 1px solid var(--about-border);
  padding: 2px 6px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 12px;
}

.page-about .mode-card h4 {
  font-family: var(--ng-font-head);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 8px;
}

.page-about .mode-card p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--about-text-dim);
  margin: 0;
}

/* ===== 荣誉与资质 ===== */
.page-about .honors-section {
  border-bottom: 1px solid var(--about-border);
}

.page-about .honors-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  position: relative;
  z-index: 1;
}

.page-about .honor-card {
  padding: 28px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-about .honor-badge {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 169, 64, 0.08);
  color: var(--about-gold);
  margin-bottom: 16px;
}

.page-about .honor-badge svg {
  width: 32px;
  height: 32px;
}

.page-about .honor-card h3 {
  font-family: var(--ng-font-head);
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0 0 10px;
}

.page-about .honor-card p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--about-text-dim);
  margin: 0;
}

/* ===== 团队与组织 ===== */
.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  position: relative;
  z-index: 1;
  margin-top: 32px;
}

.page-about .team-text p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-text-dim);
  margin: 0 0 20px;
}

.page-about .team-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.page-about .team-roles {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .role-group {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}

.page-about .role-group::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--about-cyan), var(--about-gold));
}

.page-about .role-percent {
  font-family: var(--ng-font-num);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--about-gold);
  min-width: 80px;
}

.page-about .role-name {
  font-size: 1rem;
  color: var(--ng-text-primary);
}

/* ===== 按钮共享（页面作用域） ===== */
.page-about .btn,
.page-about .btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ng-font-body);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--about-gold), var(--about-orange));
  color: #0A0E23;
  box-shadow: 0 4px 16px rgba(255, 169, 64, 0.2);
}

.page-about .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 169, 64, 0.3);
}

.page-about .btn-ghost {
  background: transparent;
  color: var(--ng-text-primary);
  border-color: var(--about-border);
  box-shadow: none;
}

.page-about .btn-ghost:hover {
  border-color: var(--about-cyan);
  color: var(--about-cyan);
  transform: translateY(-2px);
}

/* ===== 滚动显现（渐进增强） ===== */
.page-about [data-scroll-show] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.page-about [data-scroll-show][data-shown="true"] {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 平板布局（min-width: 768px） ===== */
@media (min-width: 768px) {
  .page-about .hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
  }

  .page-about .hero-frame {
    max-width: 400px;
  }

  .page-about .summary-grid {
    grid-template-columns: 1fr 1fr;
    gap: 60px;
  }

  .page-about .summary-facts {
    grid-template-columns: 1fr;
  }

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

  .page-about .eco-metrics {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .metric-block {
    flex-direction: column;
    text-align: center;
  }

  .page-about .partner-overview {
    grid-template-columns: 1fr 1.5fr;
    align-items: center;
  }

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

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

  .page-about .team-layout {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

/* ===== 桌面端布局（min-width: 1024px） ===== */
@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 160px 0 100px;
  }

  .page-about .about-section {
    padding: 110px 0;
  }

  .page-about .hero-title {
    font-size: clamp(4rem, 7vw, 7rem);
  }

  .page-about .timeline-layout {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 60px;
  }

  .page-about .timeline-media {
    display: block;
  }

  .page-about .timeline-media .media-frame {
    aspect-ratio: 16/9;
  }

  .page-about .ghost-num {
    font-size: 16rem;
    right: 0;
  }

  .page-about .ghost-num-right {
    right: 0;
  }

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

  .page-about .eco-card p {
    min-height: 88px;
  }
}

/* ===== 动画降级适配 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-about [data-scroll-show] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .collapse-panel {
    transition: none;
  }
}

.page-about {
  --ring-val: currentColor;
}