/* 移动端导航 */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: #fff;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
  z-index: 999;
  padding: 0 10px;
}

.mobile-nav .nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #666;
  text-decoration: none;
  font-size: 12px;
  transition: color 0.3s;
}

.mobile-nav .nav-item i {
  font-size: 20px;
  margin-bottom: 4px;
}

.mobile-nav .nav-item.active {
  color: var(--primary-color);
}

/* 移动端适配 */
@media screen and (max-width: 768px) {
  .mobile-nav {
    display: flex;
    justify-content: space-between;
  }
  
  /* 为底部导航腾出空间 */
  main {
    padding-bottom: 56px;
  }
}