/* ============================================
   Mac Dock 风格底部导航菜单
   参考 work 页面筛选器设计 - 长条圆角矩形
   ============================================ */

/* Dock 容器 - 固定在底部居中，筛选器风格 */
.dock-menu {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: 14px;
  box-shadow: 
    0 8px 32px rgba(0, 0, 0, 0.12),
    0 2px 8px rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.06);
  /* 默认完全隐藏，无过渡效果 */
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(20px) scale(0.95);
  filter: blur(8px);
  pointer-events: none;
}

/* Dock 菜单项 - 卡片式按钮，与筛选器一致 */
.dock-item {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 50px;
  padding: 0 20px;
  border-radius: 10px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  font-family: 'Noto Sans SC', sans-serif;
  background: rgb(250, 250, 250);
  color: #111;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.dock-item:hover {
  background: #fff;
}

/* 激活状态 - 黑底白字 */
.dock-item.is-active {
  background: #111;
  color: #fff;
}

/* ============================================
   中英文切换效果 - 与 header 一致
   ============================================ */
.dock-text {
  position: relative;
  display: inline-block;
  white-space: nowrap;
  text-align: center;
}

/* 英文文本 - 默认显示 */
.dock-text--en {
  display: inline-block;
  white-space: nowrap;
  transition: opacity 0.3s ease, transform 0.3s ease;
  position: relative;
}

/* Logo 图标样式 */
.dock-logo {
  width: 40px;
  height: 40px;
  display: block;
  object-fit: contain;
  transition: transform 0.5s ease, filter 0.5s ease, opacity 0.5s ease;
}

/* Logo 按钮特殊样式 - 调整内边距以适应logo */
.dock-item--logo {
  padding: 5px 10px;
  overflow: hidden;
}

/* Logo 按钮悬停 - 禁用上浮效果 */
.dock-item--logo:hover {
  transform: none;
}

/* Logo 悬停效果 - 放大失焦淡出 */
.dock-item--logo:hover .dock-logo {
  transform: scale(1.3);
  filter: blur(6px);
  opacity: 0;
}

/* 激活状态下的logo - 反转颜色使其在黑色背景上显示为白色 */
.dock-item.is-active .dock-logo {
  filter: invert(1) brightness(2);
}

/* logo项激活状态：隐藏logo，显示“首页”文字 */
.dock-item--logo.is-active .dock-logo {
  transform: scale(1.3);
  filter: blur(6px);
  opacity: 0;
}

.dock-item--logo.is-active .dock-text--zh {
  opacity: 1;
  transform: translate(-50%, -50%) translateY(0);
}

/* logo项激活状态悬停：切换回 logo */
.dock-item--logo.is-active:hover .dock-logo {
  transform: scale(1);
  filter: invert(1) brightness(2);
  opacity: 1;
}

.dock-item--logo.is-active:hover .dock-text--zh {
  opacity: 0;
  transform: translate(-50%, -50%) translateY(6px);
}

/* lang-zh 模式下 logo项激活状态：保持显示 logo（悬停后的状态） */
.dock-menu.lang-zh .dock-item--logo.is-active .dock-logo {
  transform: scale(1);
  filter: invert(1) brightness(2);
  opacity: 1;
}

.dock-menu.lang-zh .dock-item--logo.is-active .dock-text--zh {
  opacity: 0;
  transform: translate(-50%, -50%) translateY(6px);
}

/* lang-zh 模式下 logo项激活状态悬停：切换回“首页”文字 */
.dock-menu.lang-zh .dock-item--logo.is-active:hover .dock-logo {
  transform: scale(1.3);
  filter: blur(6px);
  opacity: 0;
}

.dock-menu.lang-zh .dock-item--logo.is-active:hover .dock-text--zh {
  opacity: 1;
  transform: translate(-50%, -50%) translateY(0);
}

/* 中文文本 - 默认隐藏 */
.dock-text--zh {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) translateY(6px);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* 悬停时切换 */
.dock-item:hover .dock-text--en {
  opacity: 0;
  transform: translateY(-6px);
}

.dock-item:hover .dock-text--zh {
  opacity: 1;
  transform: translate(-50%, -50%) translateY(0);
}

/* 激活状态：默认英文模式下保持显示中文（悬停后的状态），排除logo项 */
.dock-item.is-active:not(.dock-item--logo) .dock-text--en {
  opacity: 0;
  transform: translateY(-6px);
}

.dock-item.is-active:not(.dock-item--logo) .dock-text--zh {
  opacity: 1;
  transform: translate(-50%, -50%) translateY(0);
}

/* 激活状态悬停：切换回英文，排除logo项 */
.dock-item.is-active:not(.dock-item--logo):hover .dock-text--en {
  opacity: 1;
  transform: translateY(0);
}

.dock-item.is-active:not(.dock-item--logo):hover .dock-text--zh {
  opacity: 0;
  transform: translate(-50%, -50%) translateY(6px);
}

/* lang-zh 模式下激活状态：保持显示英文（悬停后的状态），排除logo项 */
.dock-menu.lang-zh .dock-item.is-active:not(.dock-item--logo) .dock-text--en {
  opacity: 1;
  transform: translateY(0);
}

.dock-menu.lang-zh .dock-item.is-active:not(.dock-item--logo) .dock-text--zh {
  opacity: 0;
  transform: translate(-50%, -50%) translateY(6px);
}

/* lang-zh 模式下激活状态悬停：切换回中文，排除logo项 */
.dock-menu.lang-zh .dock-item.is-active:not(.dock-item--logo):hover .dock-text--en {
  opacity: 0;
  transform: translateY(-6px);
}

.dock-menu.lang-zh .dock-item.is-active:not(.dock-item--logo):hover .dock-text--zh {
  opacity: 1;
  transform: translate(-50%, -50%) translateY(0);
}

/* 分隔线 */
.dock-divider {
  width: 1px;
  height: 32px;
  background: rgba(0, 0, 0, 0.08);
  margin: 0 2px;
  flex-shrink: 0;
}

/* 全屏按钮 */
.dock-item--fullscreen {
  width: 50px;
  padding: 0;
  position: relative;
}

.dock-fullscreen-icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.dock-item--fullscreen:hover .dock-fullscreen-icon {
  transform: scale(1.1);
}

/* 退出全屏状态：高亮背景区分 */
.dock-item--fullscreen.is-fullscreen {
  background: #111;
  color: #fff;
}

.dock-item--fullscreen.is-fullscreen:hover {
  background: #333;
}

/* Tooltip */
.dock-item--fullscreen::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: rgba(20, 20, 20, 0.88);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  font-family: 'Noto Sans SC', sans-serif;
  white-space: nowrap;
  padding: 5px 10px;
  border-radius: 6px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s ease, transform 0.18s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.dock-item--fullscreen:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* 返回顶部按钮 */
.dock-item--top {
  width: 50px;
  padding: 0;
}

.dock-top-icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  transition: transform 0.2s ease;
}

.dock-item--top:hover .dock-top-icon {
  transform: translateY(-2px);
}

/* ============================================
   阶段导航子菜单
   ============================================ */

/* 阶段按钮 - 可以有子菜单 */
.dock-item--stages {
  cursor: pointer;
}

/* 子菜单容器 */
.dock-submenu {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: 12px;
  box-shadow: 
    0 12px 40px rgba(0, 0, 0, 0.15),
    0 4px 12px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 0, 0, 0.08);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 180px;
  z-index: 10;
}

/* 子菜单显示状态 */
.dock-submenu.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

/* 子菜单项 */
.dock-submenu-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 10px 14px;
  background: rgb(250, 250, 250);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: 'Noto Sans SC', sans-serif;
  text-align: left;
  width: 100%;
}

.dock-submenu-item:hover {
  background: #111;
  transform: translateX(4px);
}

/* 子菜单标签（阶段 1） */
.dock-submenu-label {
  font-size: 11px;
  font-weight: 500;
  color: #999;
  margin-bottom: 2px;
  transition: color 0.2s ease;
}

.dock-submenu-item:hover .dock-submenu-label {
  color: rgba(255, 255, 255, 0.7);
}

/* 子菜单标题（需求分析） */
.dock-submenu-title {
  font-size: 14px;
  font-weight: 600;
  color: #111;
  transition: color 0.2s ease;
}

.dock-submenu-item:hover .dock-submenu-title {
  color: #fff;
}

/* ============================================
   响应式设计
   ============================================ */

/* 平板端 */
@media (max-width: 1200px) {
  .dock-menu {
    bottom: 20px;
    padding: 4px;
    gap: 4px;
  }
  
  .dock-item {
    height: 46px;
    padding: 0 16px;
    font-size: 13px;
  }
}

/* 小平板 */
@media (max-width: 900px) {
  .dock-item {
    height: 44px;
    padding: 0 14px;
    font-size: 13px;
  }
}

/* iPad 适配 (768px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
  .dock-menu {
    bottom: 16px;
    padding: 4px;
    gap: 3px;
  }

  .dock-item {
    height: 44px;
    padding: 0 14px;
    font-size: 13px;
  }

  .dock-item--top,
  .dock-item--fullscreen {
    width: 44px;
  }

  .dock-menu.near-footer {
    bottom: 76px;
  }
}

/* 移动端 - 隐藏Dock（使用移动端导航） */
@media (max-width: 768px) {
  .dock-menu {
    display: none;
  }
}

/* ============================================
   动画效果
   ============================================ */

/* 隐藏状态 - 无过渡（默认） */
.dock-menu.is-hidden {
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(20px) scale(0.95);
  filter: blur(8px);
  pointer-events: none;
}

/* 隐藏状态 - 失焦消失动画（仅当 dock 曾经显示过） */
.dock-menu.has-shown.is-hidden {
  transition: 
    opacity 0.35s cubic-bezier(0.4, 0, 0.6, 1),
    visibility 0.35s cubic-bezier(0.4, 0, 0.6, 1),
    transform 0.35s cubic-bezier(0.4, 0, 0.6, 1),
    filter 0.35s cubic-bezier(0.4, 0, 0.6, 1);
}

/* 显示状态 - 上浮出现动画 */
.dock-menu.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0) scale(1);
  filter: blur(0);
  pointer-events: auto;
  transition: 
    opacity 0.4s cubic-bezier(0, 0, 0.2, 1),
    visibility 0.4s cubic-bezier(0, 0, 0.2, 1),
    transform 0.4s cubic-bezier(0, 0, 0.2, 1),
    filter 0.4s cubic-bezier(0, 0, 0.2, 1),
    bottom 0.4s cubic-bezier(0, 0, 0.2, 1);
}

/* 接近页脚时上移，避免遮挡底部信息栏 */
.dock-menu.near-footer {
  bottom: 84px;
}