文本-以分区为中心，而不是以文本为中心？(Twitter启动3)

Question

我目前正在编写John's Hopkins HTML/CSS和Javascript课程，内容是使用Bootstrap 3.6编写大卫·楚国的中国小酒馆的课程(我知道已经过时了)。我遇到了一个问题，版权线在第三列(我的网站)下结束，而不是在页脚(官方网站截图)底部居中。下面是该页脚部分的代码：

<footer class="panel-footer">
    <div class="container">
        <div class="row">
            <section id="hours" class="col-sm-4">
                <span>Hours:</span><br>
                Sun-Thurs: 11:15am-10:00pm<br>
                Fri: 11:15am - 2:30pm<br>
                Saturday collapsed<hr class="visible-xs">
            </section>
            <section id="address" class="col-sm-4">
                <span>Address:</span><br>
                7105 Resterstown Road<br>
                Baltimore, MD 21215
                <p>* Delivery area within 3-4 miles, with minimum order of 
                    $20 plus $3 charge for all deliveries.</p>
                <hr class="visible-xs">
            </section>
            <section id="testimonials" class="col-sm-4">
                <p>"The best Chinese restaurant I've been to! And that's saying
                    a lot, since I've been to many!"</p>
                <p>"Amazing food! Great service! Couldn't ask for more! I'll be
                    back again and again!"</p>
            </section>
            <div class="text-center">&copy; Copyright David Chu's China Bistro 2016</div>
        </div>
        
    </div>
</footer>

现在我知道它不是居中的，因为带有版权符号的div不应该在带有class="row"的div中，但是无论如何，我不明白为什么div在第三列下面。所有的部分按照引导应该被浮动，这意味着它们被从正常的文档流中提取出来。然而，版权声明不会被浮动，所以不应该占用整个宽度并在页面中间居中吗？对不起，我是HTML/CSS的初学者！

Answer 1

解决办法就是把它移到外面的一个层次，我认为它会解决的。

<footer class="panel-footer">
    <div class="container">
        <div class="row">
            <section id="hours" class="col-sm-4">
                <span>Hours:</span><br>
                Sun-Thurs: 11:15am-10:00pm<br>
                Fri: 11:15am - 2:30pm<br>
                Saturday collapsed<hr class="visible-xs">
            </section>
            <section id="address" class="col-sm-4">
                <span>Address:</span><br>
                7105 Resterstown Road<br>
                Baltimore, MD 21215
                <p>* Delivery area within 3-4 miles, with minimum order of 
                    $20 plus $3 charge for all deliveries.</p>
                <hr class="visible-xs">
            </section>
            <section id="testimonials" class="col-sm-4">
                <p>"The best Chinese restaurant I've been to! And that's saying
                    a lot, since I've been to many!"</p>
                <p>"Amazing food! Great service! Couldn't ask for more! I'll be
                    back again and again!"</p>
            </section>
            
        </div>
        <div class="text-center">&copy; Copyright David Chu's China Bistro 2016</div>
    </div>
</footer>

如果问题仍然存在，请尝试将p标记用于版权而不是div。