/* ==========================================================
   底部公共 Tabbar 样式（5 tab：首页|商城|消息|购物车|我的）
   适配 iPhone 底部手势小黑条
   ========================================================== */
.bottom-tab {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  display: flex;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding-bottom: env(safe-area-inset-bottom); /* 小黑条安全区 */
}
.bottom-tab .tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 50px;
  color: #8a9099;
  font-size: 0.27rem;
  text-decoration: none;
  transition: color 180ms ease;
}
.bottom-tab .tab-item .tab-icon {
  line-height: 1;
  margin-bottom: 3px;
  transition: transform 160ms var(--ease-out);
}
.bottom-tab .tab-item .tab-icon svg {
  display: block;
  width: 22px;
  height: 22px;
}
/* 按压反馈：图标轻微收缩，告知点击已接收 */
.bottom-tab .tab-item:active .tab-icon {
  transform: scale(0.88);
}
.bottom-tab .tab-item.active {
  color: #1677ff;
  font-weight: 600;
}