.tabbar {
  font-family: var(--font);
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: calc(128rpx + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: rgba(251, 248, 243, 0.92);
  backdrop-filter: blur(20px);
  border-top: 1rpx solid var(--line);
  display: flex;
  align-items: flex-start;
  padding-top: 14rpx;
  z-index: 100;
}
.tab, .tab-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6rpx;
}
.tab-ico { font-size: var(--tab-icon-size); color: var(--ink-3); line-height: 1; }
.tab.active .tab-ico { color: var(--accent-deep); }
.tab-txt { font-size: 21rpx; color: var(--ink-3); }
.tab.active .tab-txt { color: var(--accent-deep); }

/* 中央凸起 FAB */
.fab {
  width: 108rpx; height: 108rpx;
  border-radius: 50%;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin-top: -52rpx;
  border: 8rpx solid var(--bg);
  box-shadow: 0 8rpx 24rpx rgba(200,126,46,0.35);
}
.fab-ico { font-size: var(--fab-icon-size); line-height: 1; }
.fab-walking { background: var(--success); box-shadow: 0 8rpx 24rpx rgba(107,142,90,0.35); }
.fab-paused { background: var(--warn); box-shadow: none; }

.center-txt-walking { color: var(--success); }
.center-txt-paused { color: var(--warn); }
.center-txt-idle { color: var(--ink-2); }