/* 竖直导航栏的容器 */
.user-nav-container {
    width: 250px;
    background-color: #f4f4f4;
    padding-top: 20px;
    border-right: 1px solid #ccc;
    height: 100%; /* 让容器填充整个父容器高度 */
    display: flex;
    flex-direction: column;
    align-items: stretch; /* 确保所有导航项都拉伸 */
  }
  
  /* 导航栏样式 */
  .user-nav {
    display: flex;
    flex-direction: column;
    padding: 0;
    margin: 0;
    flex-grow: 1; /* 使导航栏占据剩余空间 */
  }
  
  /* 每一项导航链接 */
  .user-nav-item {
    padding: 15px 20px;
    text-align: left;
    text-decoration: none;
    color: #333;
    font-size: 16px;
    border-bottom: 1px solid #e0e0e0;
    transition: background-color 0.3s ease;
  }
  
  /* 鼠标悬浮时的背景颜色 */
  .user-nav-item:hover {
    background-color: #ddd;
  }
  
  /* 激活项的样式 */
  .user-nav-item.active {
    background-color: #3b8cff;
    color: white;
  }