.page-about {
  position: relative;
  background: var(--color-night);
  color: var(--color-text-light);
  isolation: isolate;
  overflow: hidden;
}

.page-about::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(rgba(57, 255, 136, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 136, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 25% 10%, black 0%, transparent 75%);
}

.page-about .breadcrumb {
  padding: 32px 0 0;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: rgba(230, 241, 255, 0.55);
}

.page-about .breadcrumb a {
  color: var(--color-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 255, 136, 0.3);
  transition: border-color 0.2s var(--ease);
}

.page-about .breadcrumb a:hover {
  border-color: var(--color-green);
}

.page-about .breadcrumb li + li::before {
  content: '/';
  margin-right: 8px;
  color: var(--color-line);
}

.page-about .page-head {
  position: relative;
  padding: 44px 0 36px;
  border-bottom: 1px solid var(--color-line);
}

.page-about .page-head::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 120px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-green), rgba(57, 255, 136, 0.15));
}

.page-about .page-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 16px 0 24px;
  max-width: 900px;
}

.page-about .page-lede {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(230, 241, 255, 0.82);
  max-width: 760px;
  margin: 0;
}

.page-about .section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 14px;
}

.page-about .section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-about .section-index {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  color: rgba(57, 255, 136, 0.7);
  white-space: nowrap;
}

.page-about .section--tight {
  margin-top: -8px;
}

/* 品牌使命 */
.page-about .mission-section {
  padding-top: 40px;
}

.page-about .mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .mission-copy {
  font-family: var(--font-body);
  line-height: 1.8;
  color: rgba(230, 241, 255, 0.88);
}

.page-about .mission-copy p + p {
  margin-top: 16px;
}

.page-about .note-card {
  background: var(--color-night-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.page-about .note-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(230, 241, 255, 0.55);
  margin: 0 0 4px;
}

.page-about .note-value {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--color-green);
  margin: 0 0 16px;
}

.page-about .note-value:last-child {
  margin-bottom: 0;
}

/* 核心数据带 */
.page-about .stats-section {
  padding-top: 36px;
}

.page-about .stats-band {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .stat-item {
  background: var(--color-night-2);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 110px;
  justify-content: center;
}

.page-about .stat-num {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--color-green);
  line-height: 1;
}

.page-about .stat-label {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: rgba(230, 241, 255, 0.7);
}

/* 发展历程 */
.page-about .journey-section {
  padding-top: 56px;
}

.page-about .journey-figure {
  margin: 0 0 32px;
}

.page-about .journey-figure figcaption {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 0.9375rem;
  color: rgba(230, 241, 255, 0.5);
  padding-top: 10px;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 12px;
}

.page-about .timeline-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin: 0 0 24px;
}

.page-about .timeline-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 32px 36px;
}

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

.page-about .timeline-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 0;
  width: 2px;
  background: var(--color-line);
}

.page-about .timeline-item:last-child::before {
  bottom: calc(100% - 20px);
}

.page-about .timeline-item::after {
  content: '';
  position: absolute;
  left: -5px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 0 4px rgba(57, 255, 136, 0.15);
}

.page-about .timeline-year {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--color-green);
  line-height: 1;
  margin-bottom: 6px;
}

.page-about .timeline-body h4 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  margin: 0 0 8px;
}

.page-about .timeline-body p {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(230, 241, 255, 0.75);
  margin: 0;
}

/* 华人频道 */
.page-about .channel-section {
  padding-top: 64px;
}

.page-about .channel-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  background: var(--color-night-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.page-about .section-head--inline {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 16px;
}

.page-about .channel-content {
  display: flex;
  flex-direction: column;
}

.page-about .channel-content p {
  font-family: var(--font-body);
  line-height: 1.8;
  color: rgba(230, 241, 255, 0.8);
  margin: 0 0 16px;
}

.page-about .channel-points {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .channel-points li {
  position: relative;
  padding-left: 24px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: rgba(230, 241, 255, 0.85);
}

.page-about .channel-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 2px;
  background: var(--color-green);
}

.page-about .channel-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: auto;
  padding-top: 12px;
}

.page-about .channel-figure {
  margin: 0;
}

/* 数据与安全 */
.page-about .security-section {
  padding-top: 64px;
}

.page-about .security-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .security-figure {
  margin: 0;
  order: 2;
}

.page-about .security-copy {
  order: 1;
}

.page-about .security-copy p {
  font-family: var(--font-body);
  line-height: 1.8;
  color: rgba(230, 241, 255, 0.82);
  margin: 0 0 16px;
}

.page-about .security-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

/* 团队与生态 */
.page-about .team-section {
  padding-top: 64px;
}

.page-about .team-intro {
  font-family: var(--font-body);
  line-height: 1.8;
  color: rgba(230, 241, 255, 0.85);
  margin: 0 0 24px;
  max-width: 720px;
}

.page-about .tabs {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-night-2);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-about .tabs-list {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--color-line);
  background: rgba(11, 29, 58, 0.6);
}

.page-about .tab-btn {
  appearance: none;
  border: none;
  background: transparent;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: rgba(230, 241, 255, 0.65);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .tab-btn:hover {
  color: var(--color-text-light);
}

.page-about .tab-btn.is-active {
  color: var(--color-green);
  border-bottom-color: var(--color-green);
  background: rgba(57, 255, 136, 0.04);
}

.page-about .tab-panel {
  display: none;
  padding: 24px;
}

.page-about .tab-panel.is-active {
  display: block;
  animation: pageAboutFadeIn 0.3s var(--ease);
}

@keyframes pageAboutFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-about .tab-panel h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin: 0 0 10px;
}

.page-about .tab-panel p {
  font-family: var(--font-body);
  line-height: 1.8;
  color: rgba(230, 241, 255, 0.78);
  margin: 0;
}

/* 荣誉与认可 */
.page-about .honors-section {
  padding-top: 64px;
}

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

.page-about .honor-card {
  position: relative;
  background: var(--color-night-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .honor-card:hover {
  transform: translateY(-3px);
  border-color: rgba(57, 255, 136, 0.4);
}

.page-about .honor-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-green), var(--color-orange));
  border-radius: var(--radius) var(--radius) 0 0;
}

.page-about .honor-year {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 1.5rem;
  color: var(--color-green);
  margin: 0 0 8px;
}

.page-about .honor-card h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  margin: 0 0 10px;
}

.page-about .honor-desc {
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.65;
  color: rgba(230, 241, 255, 0.7);
  margin: 0 0 16px;
}

.page-about .honor-note {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(230, 241, 255, 0.65);
  border-left: 3px solid var(--color-orange);
  padding-left: 16px;
  margin: 32px 0 0;
}

/* 联系引导 */
.page-about .invite-section {
  padding-top: 64px;
}

.page-about .invite-panel {
  position: relative;
  background: var(--color-night-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
}

.page-about .invite-panel::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 20%;
  right: 20%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--color-green), var(--color-orange), transparent);
  border-radius: var(--radius) var(--radius) 0 0;
}

.page-about .invite-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin: 0 0 12px;
}

.page-about .invite-copy {
  font-family: var(--font-body);
  line-height: 1.7;
  color: rgba(230, 241, 255, 0.75);
  max-width: 560px;
  margin: 0 auto 24px;
}

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

/* 图片框架 */
.page-about .img-frame {
  display: block;
  max-width: 100%;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-night-2);
}

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

/* 按钮 */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-night);
  background: var(--color-green);
  border: 1px solid var(--color-green);
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), transform 0.15s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .btn:hover {
  background: var(--color-green-dark);
  border-color: var(--color-green-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(57, 255, 136, 0.2);
}

.page-about .btn--ghost {
  background: transparent;
  color: var(--color-green);
  border-color: var(--color-line);
}

.page-about .btn--ghost:hover {
  border-color: var(--color-green);
  background: rgba(57, 255, 136, 0.05);
  box-shadow: none;
}

.page-about .btn--orange {
  background: var(--color-orange);
  border-color: var(--color-orange);
  color: var(--color-night);
}

.page-about .btn--orange:hover {
  background: var(--color-orange-light);
  border-color: var(--color-orange-light);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.2);
}

/* 标签 */
.page-about .tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: 999px;
}

.page-about .tag--green {
  background: rgba(57, 255, 136, 0.1);
  color: var(--color-green);
  border: 1px solid rgba(57, 255, 136, 0.3);
}

.page-about .tag--orange {
  background: rgba(255, 107, 53, 0.1);
  color: var(--color-orange-light);
  border: 1px solid rgba(255, 107, 53, 0.3);
}

/* 桌面端增强 */
@media (min-width: 768px) {
  .page-about .mission-grid {
    grid-template-columns: 1fr 280px;
    align-items: start;
    gap: 40px;
  }

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

  .page-about .stat-item {
    padding: 28px 20px;
    min-height: 130px;
  }

  .page-about .timeline-item {
    padding-left: 48px;
  }

  .page-about .channel-panel {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 32px;
  }

  .page-about .channel-figure {
    align-self: center;
  }

  .page-about .security-grid {
    grid-template-columns: 1fr 1.1fr;
    gap: 40px;
    align-items: center;
  }

  .page-about .security-figure {
    order: 1;
  }

  .page-about .security-copy {
    order: 2;
  }

  .page-about .honor-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .invite-panel {
    padding: 40px 32px;
  }

  .page-about .tab-btn {
    padding: 16px 24px;
  }

  .page-about .tab-panel {
    padding: 32px;
  }
}

@media (min-width: 1024px) {
  .page-about .page-lede {
    font-size: 1.0625rem;
  }

  .page-about .journey-figure {
    margin-bottom: 40px;
  }

  .page-about .timeline-list {
    max-width: 860px;
  }

  .page-about .channel-content p {
    font-size: 1rem;
  }

  .page-about .security-copy p {
    font-size: 1rem;
  }

  .page-about .honor-card {
    padding: 28px;
  }
}