/* ===== 页面专属 CSS：.page-about ===== */
.page-about {
  --about-sidebar-width: 280px;
  --about-content-max: 820px;
  --about-gap: 2.5rem;
  --about-card-radius: 16px;
  --about-border-glow: 0 0 12px rgba(255, 215, 0, 0.25);
  --about-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --about-panel-bg: #1A1A1A;
  --about-sidebar-bg: #0F0F0F;
  --about-text-secondary: #B0B0B0;
  --about-accent-gold: #FFD700;
  --about-accent-red: #8B0000;
  --about-accent-purple: #9B59B6;
  --about-border-subtle: rgba(255, 215, 0, 0.12);
  --about-text-body: #E8E8E8;
  --about-stat-bg: rgba(139, 0, 0, 0.35);
  display: block;
  width: 100%;
  background-color: #0D0D0D;
  color: var(--about-text-body);
  font-family: var(--font-body, 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif);
  line-height: 1.7;
}
.page-about__container {
  max-width: var(--container-max, 1280px);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-size: 0.85rem;
  color: var(--about-text-secondary);
}
.page-about .breadcrumb__link {
  color: var(--about-text-secondary);
  text-decoration: none;
  transition: color var(--about-transition);
}
.page-about .breadcrumb__link:hover {
  color: var(--about-accent-gold);
}
.page-about .breadcrumb__separator {
  color: var(--about-accent-gold);
  font-size: 0.65rem;
}
.page-about .breadcrumb__current {
  color: var(--about-accent-gold);
  font-weight: 600;
}

/* ===== 侧边栏 ===== */
.page-about__layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.page-about__sidebar {
  background: var(--about-sidebar-bg);
  border: 1px solid var(--about-border-subtle);
  border-radius: var(--about-card-radius);
  padding: 1.75rem 1.5rem;
  position: relative;
  order: -1;
}
.page-about__sidebar-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.page-about__sidebar-logo {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
}
.page-about__sidebar-title {
  font-family: var(--font-heading, 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--about-accent-gold);
  text-align: center;
  margin: 0;
  letter-spacing: 0.02em;
}
.page-about__sidebar-stats {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}
.page-about__stat {
  background: var(--about-stat-bg);
  border-radius: var(--radius-pill, 50px);
  padding: 0.4rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 72px;
  border: 1px solid rgba(255, 215, 0, 0.15);
}
.page-about__stat-value {
  font-family: var(--font-heading, 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--about-accent-gold);
  line-height: 1.3;
}
.page-about__stat-label {
  font-size: 0.7rem;
  color: var(--about-text-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.page-about__sidebar-nav {
  margin-bottom: 1.5rem;
}
.page-about__sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.page-about__sidebar-link {
  display: block;
  padding: 0.6rem 1rem;
  color: var(--about-text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  border-radius: 0 6px 6px 0;
  transition: all var(--about-transition);
  font-family: var(--font-accent, 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif);
}
.page-about__sidebar-link:hover {
  color: var(--about-accent-gold);
  border-left-color: var(--about-accent-gold);
  background: rgba(255, 215, 0, 0.06);
  box-shadow: var(--about-border-glow);
}
.page-about__sidebar-contact {
  border-top: 1px solid var(--about-border-subtle);
  padding-top: 1.25rem;
  text-align: center;
}
.page-about__sidebar-contact-label {
  font-size: 0.75rem;
  color: var(--about-text-secondary);
  margin: 0 0 0.3rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.page-about__sidebar-email {
  color: var(--about-accent-gold);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: color var(--about-transition);
  word-break: break-all;
}
.page-about__sidebar-email:hover {
  color: var(--about-accent-red);
}

/* ===== 内容区 ===== */
.page-about__content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}
.page-about__section {
  scroll-margin-top: 2rem;
}
.page-about__section-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.page-about .tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.75rem;
  border-radius: var(--radius-pill, 50px);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-family: var(--font-accent, 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif);
}
.page-about .tag--purple {
  background: rgba(155, 89, 182, 0.18);
  color: var(--about-accent-purple);
  border: 1px solid rgba(155, 89, 182, 0.3);
}
.page-about__section-title {
  font-family: var(--font-heading, 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif);
  font-size: 2rem;
  font-weight: 800;
  color: var(--about-accent-gold);
  margin: 0;
  line-height: 1.2;
}

/* ===== 品牌故事 ===== */
.page-about__section--story {
  background: var(--about-panel-bg);
  border-radius: var(--about-card-radius);
  padding: 1.75rem 1.5rem;
  border: 1px solid var(--about-border-subtle);
  transition: box-shadow var(--about-transition);
}
.page-about__section--story:hover {
  box-shadow: var(--about-border-glow);
}
.page-about__story-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-about__story-image {
  flex-shrink: 0;
}
.page-about__story-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 12px;
  display: block;
  border: 1px solid rgba(255, 215, 0, 0.08);
}
.page-about__story-text {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-about__story-intro {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--about-accent-gold);
  margin: 0;
  line-height: 1.6;
}
.page-about__story-detail {
  margin: 0;
  color: var(--about-text-body);
  font-size: 0.95rem;
  line-height: 1.8;
}
.page-about__story-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.6rem;
  border-radius: var(--radius-pill, 50px);
  font-family: var(--font-accent, 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all var(--about-transition);
  border: 2px solid transparent;
  cursor: pointer;
}
.page-about .btn--primary {
  background: var(--about-accent-red);
  color: #FFFFFF;
  border-color: var(--about-accent-red);
}
.page-about .btn--primary:hover {
  background: #A00000;
  border-color: var(--about-accent-gold);
  box-shadow: 0 0 16px rgba(255, 215, 0, 0.2);
}
.page-about .btn--accent {
  background: transparent;
  color: var(--about-accent-gold);
  border-color: var(--about-accent-gold);
}
.page-about .btn--accent:hover {
  background: rgba(255, 215, 0, 0.1);
  box-shadow: 0 0 16px rgba(255, 215, 0, 0.15);
}

/* ===== 服务范围 ===== */
.page-about__section--scope {
  padding: 0;
}
.page-about__scope-intro {
  color: var(--about-text-secondary);
  font-size: 0.95rem;
  margin: 0 0 1.75rem;
  line-height: 1.7;
}
.page-about__scope-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.75rem;
}
.page-about .card {
  background: var(--about-panel-bg);
  border-radius: var(--about-card-radius);
  padding: 1.5rem;
  border: 1px solid var(--about-border-subtle);
  transition: all var(--about-transition);
}
.page-about .card:hover {
  border-color: rgba(255, 215, 0, 0.3);
  box-shadow: var(--about-border-glow);
}
.page-about__scope-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.page-about__scope-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.25rem;
}
.page-about__scope-icon svg {
  width: 36px;
  height: 36px;
}
.page-about__scope-title {
  font-family: var(--font-heading, 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--about-accent-gold);
  margin: 0;
}
.page-about__scope-text {
  font-size: 0.88rem;
  color: var(--about-text-secondary);
  margin: 0;
  line-height: 1.6;
}
.page-about__scope-banner {
  margin-top: 0.5rem;
}
.page-about__scope-banner-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 12px;
  display: block;
  border: 1px solid rgba(255, 215, 0, 0.06);
}

/* ===== 数据来源 ===== */
.page-about__section--source {
  background: var(--about-panel-bg);
  border-radius: var(--about-card-radius);
  padding: 1.75rem 1.5rem;
  border: 1px solid var(--about-border-subtle);
  transition: box-shadow var(--about-transition);
}
.page-about__section--source:hover {
  box-shadow: var(--about-border-glow);
}
.page-about__source-card {
  background: transparent !important;
  padding: 0 !important;
  border: none !important;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-about__source-text {
  margin: 0;
  font-size: 0.95rem;
  color: var(--about-text-body);
  line-height: 1.8;
}
.page-about__source-note {
  margin: 0;
  font-size: 0.88rem;
  color: var(--about-text-secondary);
  line-height: 1.7;
  padding: 1rem 1.25rem;
  background: rgba(255, 215, 0, 0.04);
  border-radius: 10px;
  border-left: 3px solid var(--about-accent-gold);
}

/* ===== 联系方式 ===== */
.page-about__section--contact {
  padding: 0;
}
.page-about__contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.75rem;
}
.page-about__contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  text-align: center;
  align-items: center;
}
.page-about__contact-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.25rem;
}
.page-about__contact-icon svg {
  width: 36px;
  height: 36px;
}
.page-about__contact-label {
  font-family: var(--font-heading, 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--about-text-secondary);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.page-about__contact-value {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--about-accent-gold);
  text-decoration: none;
  transition: color var(--about-transition);
  word-break: break-all;
}
.page-about__contact-value:hover {
  color: #FFE44D;
}
.page-about__contact-note {
  font-size: 0.8rem;
  color: var(--about-text-secondary);
  margin: 0.25rem 0 0;
  line-height: 1.5;
}
.page-about__contact-cta {
  background: var(--about-panel-bg);
  border-radius: var(--about-card-radius);
  padding: 1.5rem;
  border: 1px solid var(--about-border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
  transition: box-shadow var(--about-transition);
}
.page-about__contact-cta:hover {
  box-shadow: var(--about-border-glow);
}
.page-about__contact-cta-text {
  margin: 0;
  font-size: 0.92rem;
  color: var(--about-text-body);
  line-height: 1.6;
}

/* ===== 桌面端（≥768px） ===== */
@media (min-width: 768px) {
  .page-about__container {
    padding: 2rem 2rem 4rem;
  }
  .page-about__layout {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--about-gap);
  }
  .page-about__sidebar {
    position: sticky;
    top: 1.5rem;
    width: var(--about-sidebar-width);
    flex-shrink: 0;
    order: 0;
    padding: 2rem 1.5rem;
  }
  .page-about__sidebar-title {
    font-size: 1.8rem;
  }
  .page-about__sidebar-stats {
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
  }
  .page-about__stat {
    flex-direction: row;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    min-width: unset;
  }
  .page-about__sidebar-list {
    gap: 0.25rem;
  }
  .page-about__content {
    flex: 1;
    min-width: 0;
    max-width: var(--about-content-max);
  }
  .page-about__section-title {
    font-size: 2.2rem;
  }
  .page-about__section--story {
    padding: 2rem 2rem;
  }
  .page-about__story-layout {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-about__story-image {
    width: 45%;
    flex-shrink: 0;
  }
  .page-about__story-text {
    flex: 1;
  }
  .page-about__story-intro {
    font-size: 1.2rem;
  }
  .page-about__scope-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about__contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (min-width: 1024px) {
  .page-about__container {
    padding: 2.5rem 2.5rem 5rem;
  }
  .page-about__sidebar {
    width: 300px;
    padding: 2.5rem 1.75rem;
  }
  .page-about__scope-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-about__contact-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-about__section-title {
    font-size: 2.5rem;
  }
  .page-about__story-image {
    width: 42%;
  }
}

/* ===== 交互平滑滚动 ===== */
@media (prefers-reduced-motion: no-preference) {
  .page-about {
    scroll-behavior: smooth;
  }
}

/* ===== 移动端窄屏适配 ===== */
@media (max-width: 480px) {
  .page-about__container {
    padding: 1rem 0.75rem 2.5rem;
  }
  .page-about__sidebar {
    padding: 1.25rem 1rem;
  }
  .page-about__sidebar-title {
    font-size: 1.35rem;
  }
  .page-about__stat {
    min-width: 60px;
    padding: 0.3rem 0.7rem;
  }
  .page-about__stat-value {
    font-size: 0.95rem;
  }
  .page-about__section--story,
  .page-about__section--source,
  .page-about__contact-cta {
    padding: 1.25rem 1rem;
  }
  .page-about__section-title {
    font-size: 1.5rem;
  }
  .page-about__scope-card,
  .page-about__contact-card {
    padding: 1.15rem;
  }
  .page-about__story-actions {
    flex-direction: column;
  }
  .page-about .btn {
    width: 100%;
  }
}