.page-about {
  --page-gold: #D4AF37;
  --page-green: #39FF14;
  --page-dark: #0A1F3F;
  --page-card-bg: rgba(10, 31, 63, 0.8);
  --page-light-bg: #1A2F4F;
  --page-text-secondary: #B0C4DE;
  --page-font-mono: "SF Mono", "Source Code Pro", "Consolas", "Courier New", monospace;

  display: block;
  background-color: var(--page-dark);
  color: #FFFFFF;
  overflow-x: hidden;
}

/* 容器复用共享类，但重置内边距以适配本页节奏 */
.page-about .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
}

/* ========== 面包屑 ========== */
.page-about__breadcrumb {
  margin-bottom: 24px;
}
.page-about__breadcrumb ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  font-family: var(--page-font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--page-text-secondary);
}
.page-about__breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-about__breadcrumb li::after {
  content: "/";
  color: var(--page-gold);
  opacity: 0.5;
}
.page-about__breadcrumb li:last-child::after {
  content: none;
}
.page-about__breadcrumb a {
  color: var(--page-text-secondary);
  text-decoration: none;
  transition: color 0.25s ease;
}
.page-about__breadcrumb a:hover {
  color: var(--page-gold);
}
.page-about__breadcrumb li[aria-current="page"] {
  color: var(--page-gold);
}

/* ========== Hero 区域 ========== */
.page-about__hero {
  padding: 80px 0 60px;
  position: relative;
}
.page-about__hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.page-about__hero-text {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.page-about__title {
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
  font-weight: 800;
  font-size: 52px;
  line-height: 1.1;
  color: #FFFFFF;
  margin: 0;
  letter-spacing: -0.02em;
}
.page-about__tagline {
  font-size: 20px;
  line-height: 1.5;
  color: var(--page-gold);
  font-weight: 500;
  margin: 0;
  max-width: 520px;
}
.page-about__desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--page-text-secondary);
  margin: 0;
  max-width: 520px;
}
.page-about__hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-top: 8px;
}
.page-about__badge {
  display: inline-block;
  padding: 6px 18px;
  border: 1.5px solid var(--page-gold);
  color: var(--page-gold);
  font-family: var(--page-font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  background: rgba(212, 175, 55, 0.08);
  border-radius: 4px;
}
.page-about__since {
  color: var(--page-text-secondary);
  font-size: 14px;
  font-family: var(--page-font-mono);
  letter-spacing: 0.04em;
}

/* 右侧徽标 */
.page-about__hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.page-about__badge-figure {
  position: relative;
  margin: 0;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.page-about__badge-img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 2px solid var(--page-gold);
  border-radius: 50%;
  box-shadow: 0 0 30px rgba(212, 175, 55, 0.2);
  transition: box-shadow 0.35s ease, transform 0.35s ease;
  object-fit: cover;
}
.page-about__badge-figure:hover .page-about__badge-img {
  box-shadow: 0 0 50px rgba(212, 175, 55, 0.4);
  transform: scale(1.02);
}
.page-about__badge-caption {
  font-size: 13px;
  color: var(--page-text-secondary);
  font-family: var(--page-font-mono);
  letter-spacing: 0.06em;
  text-align: center;
}
.page-about__badge-tooltip {
  position: absolute;
  top: 50%;
  left: calc(100% + 20px);
  transform: translateY(-50%);
  background: var(--page-card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--page-gold);
  border-radius: 8px;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  transform: translateY(-50%) translateX(-6px);
  min-width: 180px;
  z-index: 10;
}
.page-about__badge-figure:hover .page-about__badge-tooltip {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}
.page-about__tooltip-line {
  font-size: 14px;
  color: #FFFFFF;
  font-family: var(--page-font-mono);
  letter-spacing: 0.03em;
}
.page-about__tooltip-line::before {
  content: "▸ ";
  color: var(--page-green);
}

/* ========== 通用章节布局 ========== */
.page-about__section {
  padding: 72px 0;
  border-top: 1px solid rgba(212, 175, 55, 0.15);
}
.page-about__section-layout {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 48px;
}
.page-about__section-note {
  padding-top: 6px;
}
.page-about__note-label {
  font-family: var(--page-font-mono);
  font-size: 14px;
  color: var(--page-gold);
  letter-spacing: 0.1em;
  opacity: 0.8;
  display: block;
}
.page-about__section-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.page-about__section-title {
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
  font-weight: 800;
  font-size: 36px;
  line-height: 1.2;
  color: #FFFFFF;
  margin: 0;
  letter-spacing: -0.015em;
}
.page-about__section-text {
  font-size: 16px;
  line-height: 1.7;
  color: var(--page-text-secondary);
  margin: 0;
  max-width: 680px;
}

/* ========== 愿景统计区 ========== */
.page-about__vision-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 12px;
}
.page-about__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about__stat-value {
  font-family: var(--page-font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--page-green);
  letter-spacing: 0.02em;
}
.page-about__stat-label {
  font-size: 14px;
  color: var(--page-text-secondary);
  font-family: var(--page-font-mono);
  letter-spacing: 0.05em;
}

/* ========== 版本历程 ========== */
.page-about__changelog {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 640px;
}
.page-about__changelog-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.page-about__changelog-icon {
  color: var(--page-gold);
  font-size: 14px;
  flex-shrink: 0;
  margin-top: 4px;
  opacity: 0.8;
}
.page-about__changelog-item div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.page-about__changelog-title {
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
}
.page-about__changelog-desc {
  font-size: 15px;
  color: var(--page-text-secondary);
  line-height: 1.6;
}
.page-about__version-link {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 12px;
}

/* ========== 数据可视化图片区 ========== */
.page-about__visual-figure {
  margin: 12px 0 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 100%;
}
.page-about__visual-img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid rgba(212, 175, 55, 0.2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  object-fit: cover;
}
.page-about__visual-caption {
  font-size: 13px;
  color: var(--page-text-secondary);
  font-family: var(--page-font-mono);
  letter-spacing: 0.05em;
  opacity: 0.7;
}

/* ========== 联系区 ========== */
.page-about__contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 560px;
}
.page-about__contact-item {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  background: var(--page-card-bg);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid rgba(212, 175, 55, 0.12);
  border-radius: 8px;
  transition: border-color 0.25s ease, background 0.25s ease;
}
.page-about__contact-item:hover {
  border-color: rgba(212, 175, 55, 0.35);
  background: rgba(10, 31, 63, 0.9);
}
.page-about__contact-icon {
  width: 50px;
  height: 50px;
  flex-shrink: 0;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid rgba(57, 255, 20, 0.2);
}
.page-about__contact-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}
.page-about__contact-label {
  font-size: 12px;
  font-family: var(--page-font-mono);
  color: var(--page-gold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.page-about__contact-value {
  font-size: 16px;
  color: #FFFFFF;
  word-break: break-all;
}
.page-about__copy-btn {
  align-self: center;
  background: transparent;
  border: 1px solid var(--page-gold);
  color: var(--page-gold);
  font-family: var(--page-font-mono);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease;
  flex-shrink: 0;
  margin-left: auto;
}
.page-about__copy-btn:hover {
  background: var(--page-gold);
  color: var(--page-dark);
}
.page-about__copy-btn:active {
  opacity: 0.7;
}
.page-about__contact-cta {
  margin-top: 8px;
}

/* ========== 信任条 ========== */
.page-about__trust-bar {
  padding: 24px 0;
  border-top: 1px solid rgba(212, 175, 55, 0.12);
  background: rgba(10, 31, 63, 0.6);
}
.page-about__trust-text {
  font-family: var(--page-font-mono);
  font-size: 13px;
  color: var(--page-text-secondary);
  letter-spacing: 0.06em;
  opacity: 0.7;
  display: block;
  text-align: center;
}

/* ========== 按钮复用 ========== */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  font-weight: 500;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 1.5px solid transparent;
}
.page-about .btn--primary {
  background: var(--page-gold);
  color: var(--page-dark);
  border-color: var(--page-gold);
}
.page-about .btn--primary:hover {
  background: transparent;
  color: var(--page-gold);
}
.page-about .btn--outline {
  background: transparent;
  color: var(--page-gold);
  border-color: var(--page-gold);
}
.page-about .btn--outline:hover {
  background: var(--page-gold);
  color: var(--page-dark);
}
.page-about .btn--ghost {
  background: transparent;
  color: var(--page-text-secondary);
  border-color: transparent;
}
.page-about .btn--ghost:hover {
  color: var(--page-gold);
  border-color: var(--page-gold);
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .page-about .container {
    padding: 0 16px;
  }
  .page-about__hero {
    padding: 48px 0 40px;
  }
  .page-about__hero-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .page-about__title {
    font-size: 34px;
  }
  .page-about__tagline {
    font-size: 18px;
  }
  .page-about__hero-visual {
    order: -1;
  }
  .page-about__badge-img {
    width: 180px;
    height: 180px;
  }
  .page-about__badge-tooltip {
    position: static;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    background: var(--page-card-bg);
    margin-top: 12px;
    border: 1px solid rgba(212, 175, 55, 0.2);
    padding: 12px 16px;
  }
  .page-about__badge-figure:hover .page-about__badge-tooltip {
    transform: none;
  }
  .page-about__section {
    padding: 48px 0;
  }
  .page-about__section-layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .page-about__section-note {
    padding-top: 0;
  }
  .page-about__section-title {
    font-size: 28px;
  }
  .page-about__vision-stats {
    gap: 20px;
  }
  .page-about__stat-value {
    font-size: 22px;
  }
  .page-about__changelog {
    gap: 16px;
  }
  .page-about__contact-item {
    flex-wrap: wrap;
    padding: 12px 16px;
  }
  .page-about__contact-icon {
    width: 40px;
    height: 40px;
  }
  .page-about__contact-value {
    font-size: 14px;
  }
  .page-about__copy-btn {
    margin-left: 0;
    align-self: flex-start;
  }
  .page-about__visual-img {
    width: 100%;
    height: auto;
  }
  .page-about__version-link {
    flex-direction: column;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .page-about__hero-layout {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .page-about__title {
    font-size: 42px;
  }
  .page-about__section-layout {
    grid-template-columns: 120px 1fr;
    gap: 32px;
  }
  .page-about__badge-tooltip {
    left: auto;
    right: calc(100% + 20px);
  }
}
</main>