/* ==========================================================
   nav.css —— 全站层级返回导航（面包屑 + 返回上一级 / 跳上上级）
   视觉风格跟随站点：深墨绿 #173f38 + 金 #C9A84C/#E8C766 + 米色暖白
   ========================================================== */
#zwNavbar {
  position: relative;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 16px;
  padding: 12px 22px;
  background: linear-gradient(180deg, rgba(23, 63, 56, 0.94) 0%, rgba(16, 25, 23, 0.98) 100%);
  border-bottom: 1px solid rgba(201, 168, 76, 0.28);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.28);
}

.zw-crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  font-family: "Noto Serif SC", "Noto Sans SC", serif;
  font-size: 14px;
  line-height: 1.6;
}

.zw-crumb {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 6px;
  color: rgba(242, 233, 215, 0.70);
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease;
}

.zw-crumb:hover {
  color: #E8C766;
  background: rgba(201, 168, 76, 0.10);
}

.zw-crumb.is-current {
  color: #E8C766;
  font-weight: 600;
}

.zw-crumb-sep {
  color: rgba(201, 168, 76, 0.5);
  padding: 0 2px;
  font-size: 12px;
}

.zw-nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.zw-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  font-size: 13px;
  color: #f2e9d7;
  background: rgba(201, 168, 76, 0.10);
  border: 1px solid rgba(201, 168, 76, 0.45);
  border-radius: 8px;
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.zw-nav-btn:hover {
  background: rgba(201, 168, 76, 0.24);
  color: #E8C766;
  box-shadow: 0 0 0 1px rgba(201, 168, 76, 0.35);
}

@media (max-width: 640px) {
  #zwNavbar {
    padding: 10px 14px;
  }
  .zw-crumbs {
    font-size: 13px;
  }
  .zw-nav-btn {
    padding: 5px 9px;
    font-size: 12px;
  }
}