div上的文本中心不使文本居中？ （推特引導 3）

Question

我目前正在使用 Bootstrap 3.6（過時的，我知道）Coursera 上的 John's Hopkins HTML/CSS 和 Javascript 課程對 David Chu's China Bistro 進行編碼。 我遇到了一個問題，版權行最終位於第三列（我的網站截圖）下方，而不是在頁腳底部居中（官方網站截圖）。 這是該頁腳部分的代碼：

<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>

現在我明白它沒有居中，因為帶有版權符號的div不應該在帶有class="row"的div內，但無論如何我不明白為什么 div 位於第三列下方。 Bootstrap 中的所有部分都應該是浮動的，這意味着它們已脫離正常的文檔流。 但是，版權聲明不是浮動的，所以不應該占據整個寬度並在頁面中間居中嗎？ 抱歉，我是 HTML/CSS 的初學者！

Answer 1

解決辦法就是把它移到外面一層，我想它會解決的。

<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>

如果問題仍然存在，請嘗試使用p標簽而不是div來獲取版權