/* ===== 页面专属：.page-about ===== */
.page-about {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  max-width: var(--max-content-width, 1200px);
  margin: 0 auto;
  min-height: calc(100vh - var(--header-mobile-height, 60px) - 80px);
  padding: 0 0 40px 0;
  position: relative;
  gap: 0;
}

/* ---------- 左侧时间线索引 ---------- */
.page-about .about-sidebar {
  flex: 0 0 200px;
  position: relative;
  padding: 40px 20px 20px 0;
  border-right: 1px solid var(--color-divider, #2A3A6A);
  display: flex;
  flex-direction: column;
}

.page-about .about-sidebar-inner {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.page-about .about-sidebar-brand {
  text-align: center;
}

.page-about .about-sidebar-brand img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  opacity: 0.85;
  border: 1px solid var(--color-accent-purple, #8A2BE2);
  border-radius: var(--radius-md, 12px);
  padding: 8px;
  background: rgba(138, 43, 226, 0.08);
  box-shadow: 0 0 16px rgba(138, 43, 226, 0.15);
  transition: opacity var(--transition-smooth, 0.35s);
}
.page-about .about-sidebar-brand img:hover {
  opacity: 1;
  box-shadow: 0 0 24px rgba(138, 43, 226, 0.3);
}

.page-about .about-timeline {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
  padding-left: 28px;
}
.page-about .about-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent-purple, #8A2BE2), var(--color-accent-green, #39FF14));
  border-radius: 2px;
}

.page-about .about-timeline-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  text-decoration: none;
  color: var(--color-text-secondary, #A0B0D0);
  border-radius: var(--radius-sm, 6px);
  background: transparent;
  transition: all var(--transition-fast, 0.2s);
  position: relative;
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.4;
}
.page-about .about-timeline-item::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-purple, #8A2BE2);
  border: 2px solid var(--color-primary-bg, #0A2463);
  transition: all var(--transition-fast, 0.2s);
}
.page-about .about-timeline-item:hover,
.page-about .about-timeline-item:focus-visible {
  color: var(--color-text-primary, #E0E6FF);
  background: rgba(138, 43, 226, 0.12);
  outline: none;
}
.page-about .about-timeline-item:hover::before,
.page-about .about-timeline-item:focus-visible::before {
  background: var(--color-accent-green, #39FF14);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
}

.page-about .about-timeline-num {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent-purple, #8A2BE2);
  min-width: 24px;
  letter-spacing: 0.05em;
}
.page-about .about-timeline-label {
  font-weight: 500;
}

.page-about .about-sidebar-footer {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--color-divider, #2A3A6A);
}
.page-about .about-sidebar-tagline {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 0.65rem;
  color: var(--color-accent-green, #39FF14);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  text-align: center;
  opacity: 0.7;
}

/* ---------- 右侧主内容 ---------- */
.page-about .about-content {
  flex: 1;
  padding: 40px 48px 40px 48px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* 面包屑 */
.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 0.75rem;
  color: var(--color-text-secondary, #A0B0D0);
  padding: 0 0 4px 0;
}
.page-about .about-breadcrumb a {
  color: var(--color-accent-purple, #8A2BE2);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s);
}
.page-about .about-breadcrumb a:hover,
.page-about .about-breadcrumb a:focus-visible {
  color: var(--color-hover-state, #B366FF);
  text-decoration: underline;
  outline: none;
}
.page-about .about-breadcrumb-sep {
  color: var(--color-divider, #2A3A6A);
}
.page-about .about-breadcrumb [aria-current="page"] {
  color: var(--color-text-primary, #E0E6FF);
  font-weight: 500;
}

/* ---------- 杂志封面 ---------- */
.page-about .about-cover {
  display: flex;
  flex-direction: column;
  padding: 32px 0 24px 0;
  border-bottom: 2px solid var(--color-divider, #2A3A6A);
  margin-bottom: 8px;
}
.page-about .about-cover-text {
  max-width: 780px;
}
.page-about .about-cover-kicker {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-accent-purple, #8A2BE2);
  margin: 0 0 12px 0;
  opacity: 0.8;
}
.page-about .about-cover-title {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.1;
  color: var(--color-text-primary, #E0E6FF);
  margin: 0 0 16px 0;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-shadow: 0 2px 12px rgba(57, 255, 20, 0.15);
}
.page-about .about-cover-sub {
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--color-text-secondary, #A0B0D0);
  margin: 0 0 24px 0;
  max-width: 640px;
}
.page-about .about-cover-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}
.page-about .about-cover-stat {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 0.8rem;
  color: var(--color-text-secondary, #A0B0D0);
  letter-spacing: 0.05em;
}
.highlight-green {
  color: var(--color-accent-green, #39FF14);
  font-weight: 700;
  text-shadow: 0 0 8px rgba(57, 255, 20, 0.25);
}

/* ---------- 板块通用 ---------- */
.page-about .about-section {
  padding: 28px 0;
  scroll-margin-top: 80px;
}
.page-about .about-section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}
.page-about .about-section-num {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--color-accent-purple, #8A2BE2);
  opacity: 0.6;
  line-height: 1;
}
.page-about .about-section-title {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text-primary, #E0E6FF);
  margin: 0;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.page-about .about-section-body {
  padding-left: 0;
}

/* ---------- 板块1：我们的专注 ---------- */
.page-about .about-focus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.page-about .about-focus-card {
  background: var(--color-card-bg, #121E3A);
  border-radius: var(--radius-lg, 24px);
  padding: 28px 24px 24px;
  border: 1px solid var(--color-divider, #2A3A6A);
  transition: all var(--transition-smooth, 0.35s);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about .about-focus-card:hover {
  border-color: var(--color-accent-purple, #8A2BE2);
  box-shadow: var(--shadow-glow-purple, 0 0 12px rgba(138,43,226,0.4));
  transform: translateY(-4px);
}
.page-about .about-focus-icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 4px;
}
.page-about .about-focus-heading {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary, #E0E6FF);
  margin: 0;
  letter-spacing: 0.02em;
}
.page-about .about-focus-text {
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text-secondary, #A0B0D0);
  margin: 0;
}

/* ---------- 分隔装饰 ---------- */
.page-about .about-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 8px 0;
  margin: 4px 0;
}
.page-about .about-divider-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-purple, #8A2BE2);
  opacity: 0.4;
}
.page-about .about-divider-dot:nth-child(2) {
  background: var(--color-accent-green, #39FF14);
  opacity: 0.6;
}
.page-about .about-divider-dot:nth-child(3) {
  background: var(--color-accent-purple, #8A2BE2);
  opacity: 0.4;
}

/* ---------- 板块2：数据透明 ---------- */
.page-about .about-data-layout {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}
.page-about .about-data-text {
  flex: 1;
  min-width: 0;
}
.page-about .about-data-lead {
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-primary, #E0E6FF);
  margin: 0 0 24px 0;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-divider, #2A3A6A);
}
.page-about .about-data-method {
  margin-bottom: 24px;
}
.page-about .about-data-method-title {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent-purple, #8A2BE2);
  margin: 0 0 12px 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.page-about .about-data-method-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-about .about-data-method-list li {
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 0.85rem;
  color: var(--color-text-secondary, #A0B0D0);
  line-height: 1.6;
  padding: 4px 0;
  border-bottom: 1px solid rgba(42, 58, 106, 0.3);
}
.page-about .about-data-method-label {
  color: var(--color-text-primary, #E0E6FF);
  font-weight: 600;
}
.page-about .about-data-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 20px;
}
.page-about .about-data-stat-item {
  background: var(--color-card-bg, #121E3A);
  border-radius: var(--radius-md, 12px);
  padding: 16px 12px;
  text-align: center;
  border: 1px solid var(--color-divider, #2A3A6A);
}
.page-about .about-data-stat-value {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 1.6rem;
  font-weight: 900;
  display: block;
  line-height: 1.2;
  margin-bottom: 4px;
}
.page-about .about-data-stat-label {
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 0.7rem;
  color: var(--color-text-secondary, #A0B0D0);
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.page-about .about-data-figure {
  flex: 0 0 300px;
  margin: 0;
}
.page-about .about-data-figure img {
  width: 100%;
  height: auto;
  max-width: 400px;
  border-radius: var(--radius-md, 12px);
  border: 1px solid var(--color-divider, #2A3A6A);
  display: block;
  object-fit: cover;
}
.page-about .about-data-caption {
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 0.7rem;
  color: var(--color-text-secondary, #A0B0D0);
  margin-top: 8px;
  text-align: center;
  opacity: 0.7;
}
.page-about .about-data-flow {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-divider, #2A3A6A);
}
.page-about .about-data-flow-figure {
  margin: 0;
  text-align: center;
}
.page-about .about-data-flow-figure img {
  width: 100%;
  height: auto;
  max-width: 500px;
  border-radius: var(--radius-md, 12px);
  border: 1px solid var(--color-divider, #2A3A6A);
  display: block;
  margin: 0 auto;
  object-fit: cover;
}

/* ---------- 板块3：联系方式 ---------- */
.page-about .about-contact-layout {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}
.page-about .about-contact-info {
  flex: 1;
}
.page-about .about-contact-intro {
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-primary, #E0E6FF);
  margin: 0 0 24px 0;
}
.page-about .about-contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about .about-contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  background: var(--color-card-bg, #121E3A);
  border-radius: var(--radius-md, 12px);
  border: 1px solid var(--color-divider, #2A3A6A);
}
.page-about .about-contact-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  width: 32px;
  text-align: center;
}
.page-about .about-contact-item div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.page-about .about-contact-label {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-purple, #8A2BE2);
  opacity: 0.7;
}
.page-about .about-contact-value {
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 0.9rem;
  color: var(--color-text-primary, #E0E6FF);
  word-break: break-all;
}
.page-about .about-contact-cta {
  flex: 0 0 280px;
  background: var(--color-card-bg, #121E3A);
  border-radius: var(--radius-lg, 24px);
  padding: 28px 24px;
  border: 1px solid var(--color-accent-purple, #8A2BE2);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-about .about-contact-cta-text {
  font-family: var(--font-body, 'Courier New', sans-serif);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--color-text-secondary, #A0B0D0);
  margin: 0;
}
.page-about .about-contact-btn {
  align-self: flex-start;
}

/* ---------- 信任声明 ---------- */
.page-about .about-trust {
  margin-top: 16px;
  padding: 20px 0 0 0;
  border-top: 1px solid var(--color-divider, #2A3A6A);
  text-align: center;
}
.page-about .about-trust-text {
  font-family: var(--font-heading, 'Courier New', monospace);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary, #A0B0D0);
  margin: 0;
  text-transform: uppercase;
}

/* ---------- 响应式：窄屏 / 移动端 ---------- */
@media (max-width: 768px) {
  .page-about {
    flex-direction: column;
    padding: 0 16px 40px 16px;
    min-height: auto;
  }

  .page-about .about-sidebar {
    flex: none;
    width: 100%;
    padding: 16px 0 12px 0;
    border-right: none;
    border-bottom: 1px solid var(--color-divider, #2A3A6A);
  }

  .page-about .about-sidebar-inner {
    position: static;
    flex-direction: row;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
  }

  .page-about .about-sidebar-brand {
    flex: 0 0 48px;
  }
  .page-about .about-sidebar-brand img {
    width: 48px;
    height: 48px;
    padding: 4px;
  }

  .page-about .about-timeline {
    flex-direction: row;
    padding-left: 0;
    gap: 4px;
    flex: 1;
    flex-wrap: wrap;
  }
  .page-about .about-timeline::before {
    display: none;
  }
  .page-about .about-timeline-item {
    padding: 6px 10px;
    font-size: 0.75rem;
  }
  .page-about .about-timeline-item::before {
    display: none;
  }
  .page-about .about-timeline-num {
    font-size: 0.65rem;
    min-width: 18px;
  }

  .page-about .about-sidebar-footer {
    display: none;
  }

  .page-about .about-content {
    padding: 20px 0 0 0;
  }

  .page-about .about-cover-title {
    font-size: 1.8rem;
  }
  .page-about .about-cover-sub {
    font-size: 0.9rem;
  }
  .page-about .about-cover-meta {
    gap: 12px;
  }
  .page-about .about-cover-stat {
    font-size: 0.7rem;
  }

  .page-about .about-focus-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .page-about .about-focus-card {
    padding: 20px 16px;
  }

  .page-about .about-data-layout {
    flex-direction: column;
    gap: 24px;
  }
  .page-about .about-data-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
  .page-about .about-data-stat-value {
    font-size: 1.2rem;
  }
  .page-about .about-data-figure {
    flex: none;
    width: 100%;
  }
  .page-about .about-data-figure img {
    max-width: 100%;
  }
  .page-about .about-data-flow-figure img {
    max-width: 100%;
  }

  .page-about .about-contact-layout {
    flex-direction: column;
    gap: 24px;
  }
  .page-about .about-contact-cta {
    flex: none;
    width: 100%;
  }

  .page-about .about-section-title {
    font-size: 1.2rem;
  }
  .page-about .about-section-num {
    font-size: 1rem;
  }
}

/* ---------- 桌面微调 ---------- */
@media (min-width: 769px) and (max-width: 1024px) {
  .page-about .about-sidebar {
    flex-basis: 160px;
    padding-right: 16px;
  }
  .page-about .about-content {
    padding: 32px 24px;
  }
  .page-about .about-focus-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-data-stats {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-contact-cta {
    flex-basis: 240px;
  }
}