/* page-about 专属样式 */
.page-about {
  --timeline-line-color: var(--color-gold, #F4A261);
  --timeline-dot-size: 16px;
  --timeline-node-gap: 2rem;
}

/* 面包屑 */
.page-about .breadcrumb {
  padding: 1rem 0 0.5rem;
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: 0.875rem;
  color: var(--color-text-light, #fff);
  background: transparent;
}
.page-about .breadcrumb a {
  color: var(--color-gold, #F4A261);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  text-decoration: underline;
}
.page-about .breadcrumb__sep {
  margin: 0 0.5rem;
  color: var(--color-text-light, #fff);
  opacity: 0.6;
}
.page-about .breadcrumb__current {
  color: var(--color-text-light, #fff);
  opacity: 0.8;
}

/* 品牌理念区块 */
.page-about .about-hero {
  padding: 2rem 0 3rem;
  text-align: center;
}
.page-about .about-hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.page-about .about-hero__logo img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 50%;
  box-shadow: var(--shadow-glow-gold, 0 0 12px rgba(244,162,97,0.4));
}
.page-about .about-hero__title {
  margin: 0;
}
.page-about .about-hero__text {
  max-width: 700px;
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--color-text-light, #fff);
}
.page-about .about-hero__sub {
  max-width: 600px;
  font-size: 1rem;
  color: var(--color-gold, #F4A261);
  font-style: italic;
}

/* 平台特色 */
.page-about .about-features {
  padding: 3rem 0;
  background: rgba(13, 26, 42, 0.6);
  backdrop-filter: blur(4px);
}
.page-about .about-features__intro {
  text-align: center;
  color: var(--color-text-light, #fff);
  margin-bottom: 2rem;
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: 1rem;
}

/* 时间线容器 */
.page-about .timeline {
  position: relative;
  padding-left: calc(var(--timeline-dot-size) / 2 + 1rem);
  margin: 0 auto;
  max-width: 800px;
}
/* 时间线伪元素连接线 */
.page-about .timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--timeline-line-color);
  transform: translateX(-50%);
}

/* 每个节点 */
.page-about .timeline__node {
  position: relative;
  margin-bottom: var(--timeline-node-gap);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(6px);
  border: 1px solid var(--color-gold, #F4A261);
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow var(--transition-base, 0.25s ease), transform var(--transition-base, 0.25s ease);
  cursor: pointer;
}
.page-about .timeline__node[open] {
  box-shadow: var(--shadow-card, 0 4px 20px rgba(0,0,0,0.25));
}
.page-about .timeline__node:hover {
  box-shadow: 0 8px 30px rgba(244,162,97,0.3);
  transform: translateY(-2px);
}

/* 节点头部 (summary) */
.page-about .timeline__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: rgba(27, 45, 77, 0.5);
  list-style: none;
  cursor: pointer;
  user-select: none;
  position: relative;
  z-index: 1;
}
.page-about .timeline__header::-webkit-details-marker {
  display: none;
}
.page-about .timeline__dot {
  width: var(--timeline-dot-size);
  height: var(--timeline-dot-size);
  background: var(--color-gold, #F4A261);
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 0 4px rgba(244,162,97,0.3);
}
.page-about .timeline__date {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 0.8rem;
  color: var(--color-gold, #F4A261);
  letter-spacing: 1px;
  text-transform: uppercase;
  min-width: 70px;
}
.page-about .timeline__title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 1.2rem;
  color: var(--color-text-light, #fff);
  flex-grow: 1;
}
.page-about .timeline__icon {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-gold, #F4A261);
  transition: transform 0.3s ease;
}
.page-about .timeline__node[open] .timeline__icon {
  transform: rotate(45deg);
}

/* 节点内容体 */
.page-about .timeline__body {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 1.5rem 1.5rem;
  color: var(--color-text-light, #fff);
}
.page-about .timeline__text {
  flex: 1;
  min-width: 200px;
}
.page-about .timeline__text p {
  margin: 0 0 0.5rem;
  line-height: 1.6;
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
}
.page-about .timeline__image {
  flex-shrink: 0;
  width: 150px;
}
@media (min-width: 600px) {
  .page-about .timeline__image {
    width: 200px;
  }
}
.page-about .timeline__image img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 4px;
}

/* CTA文字 */
.page-about .about-features__cta {
  text-align: center;
  margin-top: 2rem;
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  color: var(--color-text-light, #fff);
}
.page-about .about-features__cta a {
  color: var(--color-gold, #F4A261);
  text-decoration: underline;
}

/* 数据安全与隐私 */
.page-about .about-privacy {
  padding: 3rem 0;
}
.page-about .about-privacy__content {
  max-width: 700px;
  margin: 0 auto;
  color: var(--color-text-light, #fff);
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  line-height: 1.7;
}
.page-about .about-privacy__content p {
  margin-bottom: 1rem;
}
.page-about .about-privacy__content a {
  color: var(--color-gold, #F4A261);
  text-decoration: underline;
}
.page-about .about-privacy__trust {
  max-width: 700px;
  margin: 2rem auto 0;
  padding: 0.8rem 1.2rem;
  border-left: 4px solid var(--color-gold, #F4A261);
  background: rgba(244,162,97,0.1);
  color: var(--color-text-light, #fff);
  font-size: 0.9rem;
  font-style: italic;
}

/* 移动端优先基础调整 */
@media (max-width: 599px) {
  .page-about .timeline {
    padding-left: 1rem;
  }
  .page-about .timeline::before {
    left: 0.5rem;
  }
  .page-about .timeline__header {
    flex-wrap: wrap;
    padding: 0.8rem;
  }
  .page-about .timeline__date {
    min-width: auto;
  }
  .page-about .timeline__title {
    font-size: 1rem;
  }
  .page-about .timeline__body {
    flex-direction: column;
  }
  .page-about .timeline__image {
    width: 100%;
    max-width: 200px;
  }
  .page-about .about-hero__title {
    font-size: 1.8rem;
  }
  .page-about .about-hero__text {
    font-size: 1rem;
  }
}

/* 桌面增强 */
@media (min-width: 900px) {
  .page-about .timeline {
    padding-left: 2rem;
  }
  .page-about .timeline__node {
    margin-bottom: 2.5rem;
  }
  .page-about .timeline__header {
    padding: 1.2rem 2rem;
  }
  .page-about .timeline__date {
    font-size: 0.9rem;
    min-width: 100px;
  }
  .page-about .timeline__title {
    font-size: 1.4rem;
  }
}