float布局 

<style>.nav {overflow: hidden;background-color: #6adfd0; /* 导航栏背景颜色 */}.nav a {float: left;display: block;text-align: center;padding: 14px 16px;text-decoration: none;color: #000000; /* 导航栏文字颜色 */}.nav a:hover {background-color: #21c2c7; /* 鼠标悬停时的背景颜色 */}</style><div class="nav"><a href="#">首页</a><a href="#">关于</a><a href="#">服务</a><a href="#">联系我们</a></div>

flex布局

<style>.nav {display: flex;background-color: #f8f8f8; /* 导航栏背景颜色 */}.nav a {flex: 1;display: flex;align-items: center;justify-content: center;padding: 14px 16px;text-decoration: none;color: #555555; /* 导航栏文字颜色 */}.nav a:hover {background-color: #dddddd; /* 鼠标悬停时的背景颜色 */}
</style><div class="nav"><a href="#">首页</a><a href="#">关于</a><a href="#">服务</a><a href="#">联系我们</a>
</div>