/* ===== 页面专属：品牌概况 ===== */
.page-about {
  --about-bg: var(--color-cream);
  --about-card-bg: var(--color-white);
  --about-line: var(--color-cream-dark);
  --about-dot: var(--color-accent);
  --about-dot-hover: var(--color-gold);
  --about-label: var(--color-dark-light);
  --about-number: var(--color-gold-dark);
  --about-highlight: var(--color-primary-light);

  background-color: var(--about-bg);
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-3xl);
  min-height: 60vh;
}

/* ---- 面包屑 ---- */
.page-about .breadcrumb {
  margin-bottom: var(--spacing-lg);
  font-size: 14px;
}
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  list-style: none;
  padding: 0;
  margin: 0;
}
.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "·";
  margin-right: var(--spacing-xs);
  color: var(--color-brown-light);
}
.page-about .breadcrumb__link {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-about .breadcrumb__link:hover {
  color: var(--color-gold-dark);
  text-decoration: underline;
}
.page-about .breadcrumb__current {
  color: var(--color-dark);
  font-weight: 500;
}

/* ---- 顶部品牌区 ---- */
.page-about .about-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  gap: var(--spacing-lg);
}
.page-about .about-header__icon {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 3px solid var(--color-gold-light);
  box-shadow: var(--shadow-md);
  background-color: var(--color-cream-dark);
  flex-shrink: 0;
}
.page-about .about-header__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-about .about-header__text {
  max-width: 720px;
}
.page-about .about-header__title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 var(--spacing-xs);
  letter-spacing: 2px;
}
.page-about .about-header__subtitle {
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--color-gold-dark);
  margin: 0 0 var(--spacing-md);
  letter-spacing: 4px;
}
.page-about .about-header__desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-dark-light);
  margin: 0;
}

/* ---- 时间轴容器 ---- */
.page-about .timeline-wrap {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}
.page-about .timeline-deco {
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 40px;
  height: 100%;
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
}
.page-about .timeline-deco__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---- 时间轴 ---- */
.page-about .timeline {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  padding-left: 60px;
}
/* 垂直线条 */
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 12px;
  bottom: 12px;
  width: 3px;
  background: var(--about-line);
  border-radius: var(--radius-full);
}

/* ---- 时间轴条目 ---- */
.page-about .timeline__item {
  position: relative;
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

/* ---- 时间节点 ---- */
.page-about .timeline__node {
  position: absolute;
  left: -60px;
  top: 0;
  width: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  z-index: 2;
  transition: transform var(--transition-base);
}
.page-about .timeline__node:hover {
  transform: scale(1.12);
}
.page-about .timeline__node-number {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--about-number);
  letter-spacing: 0.5px;
  font-weight: 500;
  transition: color var(--transition-fast);
}
.page-about .timeline__node:hover .timeline__node-number {
  color: var(--color-gold);
}
.page-about .timeline__node-label {
  font-family: var(--font-heading);
  font-size: 11px;
  color: var(--about-label);
  text-align: center;
  line-height: 1.3;
  font-weight: 600;
  transition: color var(--transition-fast);
}
.page-about .timeline__node:hover .timeline__node-label {
  color: var(--color-primary);
}
.page-about .timeline__node-dot {
  width: 14px;
  height: 14px;
  border-radius: var(--radius-full);
  background: var(--about-dot);
  border: 3px solid var(--color-cream);
  box-shadow: 0 0 0 2px var(--about-line);
  flex-shrink: 0;
  transition: background var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}
.page-about .timeline__node:hover .timeline__node-dot {
  background: var(--about-dot-hover);
  transform: scale(1.15);
  box-shadow: 0 0 0 2px var(--color-gold);
}
.page-about .timeline__node-hint {
  font-size: 10px;
  color: var(--color-brown-light);
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity var(--transition-base), max-height var(--transition-base);
  text-align: center;
  font-family: var(--font-body);
  letter-spacing: 1px;
}
.page-about .timeline__node:hover .timeline__node-hint {
  opacity: 1;
  max-height: 24px;
}

/* ---- 时间轴卡片 ---- */
.page-about .timeline__card {
  flex: 1;
  min-width: 0;
  background: var(--about-card-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-gold-light);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.page-about .timeline__card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.page-about .timeline__card--contact {
  border-left-color: var(--color-primary-light);
}
.page-about .timeline__card-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-dark);
  margin: 0 0 var(--spacing-sm);
}
.page-about .timeline__card-summary {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-dark-light);
  margin: 0 0 var(--spacing-md);
}
.page-about .timeline__card-media {
  width: 100%;
  max-width: 360px;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}
.page-about .timeline__card-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---- details 展开 ---- */
.page-about .timeline__details {
  margin-top: var(--spacing-sm);
  border-top: 1px solid var(--color-cream-dark);
  padding-top: var(--spacing-sm);
}
.page-about .timeline__details-trigger {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  cursor: pointer;
  user-select: none;
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-fast);
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}
.page-about .timeline__details-trigger::-webkit-details-marker {
  display: none;
}
.page-about .timeline__details-trigger::before {
  content: "▶";
  font-size: 10px;
  transition: transform var(--transition-base);
  color: var(--color-gold-dark);
}
.page-about .timeline__details[open] .timeline__details-trigger::before {
  transform: rotate(90deg);
}
.page-about .timeline__details-trigger:hover {
  color: var(--color-gold-dark);
}
.page-about .timeline__details-body {
  padding: var(--spacing-sm) 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-dark-light);
}
.page-about .timeline__details-body p {
  margin: 0 0 var(--spacing-sm);
}
.page-about .timeline__details-body p:last-child {
  margin-bottom: 0;
}
.page-about .timeline__link {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}
.page-about .timeline__link:hover {
  color: var(--color-gold-dark);
}

/* ---- 联系列表 ---- */
.page-about .contact-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.page-about .contact-list__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--spacing-xs);
  font-size: 14px;
}
.page-about .contact-list__label {
  font-weight: 600;
  color: var(--color-dark);
  min-width: 48px;
}
.page-about .contact-list__value {
  color: var(--color-dark-light);
  word-break: break-all;
}
.page-about .contact-list__note {
  font-size: 12px;
  color: var(--color-brown-light);
  margin-left: auto;
}
.page-about .contact-note {
  font-size: 13px;
  color: var(--color-brown);
  background: var(--color-cream);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  margin: 0 0 var(--spacing-md);
  border-left: 3px solid var(--color-gold-light);
}
.page-about .btn--gold {
  display: inline-block;
  background: var(--color-gold);
  color: var(--color-white);
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  border: none;
  cursor: pointer;
}
.page-about .btn--gold:hover {
  background: var(--color-gold-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* ---- 响应式 ---- */
@media (min-width: 768px) {
  .page-about {
    padding-top: var(--spacing-2xl);
    padding-bottom: var(--spacing-3xl);
  }
  .page-about .about-header {
    flex-direction: row;
    text-align: left;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
  }
  .page-about .about-header__icon {
    width: 160px;
    height: 160px;
  }
  .page-about .about-header__title {
    font-size: 40px;
  }
  .page-about .about-header__subtitle {
    font-size: 22px;
  }
  .page-about .about-header__desc {
    font-size: 17px;
  }
  .page-about .timeline {
    padding-left: 80px;
    gap: var(--spacing-2xl);
  }
  .page-about .timeline::before {
    left: 28px;
  }
  .page-about .timeline__node {
    left: -80px;
    width: 56px;
  }
  .page-about .timeline__node-number {
    font-size: 13px;
  }
  .page-about .timeline__node-label {
    font-size: 14px;
  }
  .page-about .timeline__node-dot {
    width: 18px;
    height: 18px;
  }
  .page-about .timeline__node-hint {
    font-size: 11px;
  }
  .page-about .timeline__card {
    padding: var(--spacing-xl);
  }
  .page-about .timeline__card-title {
    font-size: 24px;
  }
  .page-about .timeline__card-summary {
    font-size: 16px;
  }
  .page-about .timeline__details-body {
    font-size: 15px;
  }
  .page-about .timeline-deco {
    left: 36px;
    width: 56px;
  }
  .page-about .contact-list__item {
    font-size: 15px;
  }
  .page-about .contact-note {
    font-size: 14px;
  }
}

@media (max-width: 420px) {
  .page-about .about-header__title {
    font-size: 26px;
  }
  .page-about .about-header__subtitle {
    font-size: 16px;
    letter-spacing: 2px;
  }
  .page-about .timeline {
    padding-left: 48px;
  }
  .page-about .timeline__node {
    left: -48px;
    width: 36px;
  }
  .page-about .timeline__node-label {
    font-size: 10px;
  }
  .page-about .timeline__node-number {
    font-size: 10px;
  }
  .page-about .timeline__node-dot {
    width: 12px;
    height: 12px;
  }
  .page-about .timeline__card {
    padding: var(--spacing-md);
  }
  .page-about .timeline__card-title {
    font-size: 18px;
  }
  .page-about .timeline__deco {
    display: none;
  }
  .page-about .timeline-deco {
    width: 28px;
    left: 20px;
  }
}