如何垂直和水平居中黑匣子

Question

我正在尝试垂直和水平地将黑盒居中！对于水平居中，我已经尝试过margin: auto但它不适用于高分辨率。

我正在尝试使我的英雄区域响应。当我减小窗口的宽度时，黑框居中，但在高宽度时，它保持左侧。

也请帮我水平对齐！也请帮我调整背景！

因此，我的问题是：-

1. 我想垂直和水平地将黑匣子居中！
2. 帮助我调整红色背景以使其响应迅速

#header{
	width: 100%;
	height: 100px;
	background: rgba(0,0,0,0.7);
}
#heroarea{
	max-width: 100%;
	height: calc(100vh - 100px);
	background:red;
	position: relative;
}
#hero-intro-box{
	background: rgba(0,0,0,0.8);
	width: 100%;
	max-width: 800px;
	height: auto;
	border: 1px solid white;
	border-radius: 15px;
	padding: 10px;
	padding-bottom: 30px;
	margin: auto;
}
#hero-intro-box h1{
	color: white;
	text-align: center;
	padding-top: 3%;
}
#hero-intro-box p{
	color: white;
	margin: 15px;
	padding: 3%;
	padding-top: 2%;
}
#hero-intro-box #book-now-button{
	height: 50px;
	width: 150px;
	background: rgba(255,255,255,0.5);
	text-align: center;
	border-radius: 15px;
	border: 2px solid darkgrey;
	margin: auto;
}
@media (max-width: 400px) {
	#heroarea{
		height: 600px;
	}
	#hero-intro-box{
		height: auto;
		margin-bottom: 30px;
		position: relative;
		top: 0px;
		bottom: 0px;
	}
}
@media (min-width: 550px) {
	#heroarea{
		height: calc(100vh - 100px);
	}	
}

    <link href="https://cdnjs.cloudflare.com/ajax/libs/skeleton/2.0.4/skeleton.min.css" rel="stylesheet" />
  <div id="header">
      <div class="container">
      </div>
  </div>
  <div id="heroarea">
      <div class="container">
          <div  id="hero-intro-box" class="ten columns">
              <h1>Enjoy world-class Cuisines</h1>
              <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum</p>
              <div id="book-now-button">Book us now!!</div>
          </div>
      </div>
  </div>

Answer 1

对齐元素的最可靠方法是使用 CSS3 表格布局。有关更多信息，请阅读本文。

在下面的代码中，我使用了这种技术。查看它在全屏模式下和窗口大小调整时的运行方式。我还修复了您的背景以适应整个页面的大小，将文本居中"立即预订我们！！"按钮，并使文本对齐（更漂亮）。

body {
  margin: 0;
  }
#header{
	width: 100%;
	height: 100px;
	background: rgba(0,0,0,0.7);
}
#heroarea{
    width: 100%;
	height: calc(100vh - 100px);
	background-color:red;
}
.container {
    display: table;
	width: 100%;  
    height: 100%;  
}
.container > span {
    display: table-cell;
    text-align: center;
    vertical-align: middle;
}
#hero-intro-box{
	background: rgba(0,0,0,0.8);
	width: 100%;
	max-width: 800px;
	height: auto;
	border: 1px solid white;
	border-radius: 15px;
	padding: 10px 10px 30px 10px;
}
#hero-intro-box h1{
	color: white;
	text-align: center;
	padding-top: 3%;
}
#hero-intro-box p{
	color: white;
	margin: 15px;
	padding: 3%;
	padding-top: 2%;
    text-align: justify;
}
#hero-intro-box #book-now-button{
    display: table;
	height: 50px;
	width: 150px;
	background: rgba(255,255,255,0.5);
	text-align: center;
	border-radius: 15px;
	border: 2px solid darkgrey;
    margin: 0 auto;
}
#book-now-button > span{
  display: table-cell;
  text-align: center;
  vertical-align: middle;
}
@media (max-width: 400px) {
	#heroarea{
		height: 600px;
	}
	#hero-intro-box{
		height: auto;
		margin-bottom: 30px;
		position: relative;
		top: 0px;
		bottom: 0px;
	}
}
@media (min-width: 550px) {
	#heroarea{
		height: calc(100vh - 100px);
	}	
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/skeleton/2.0.4/skeleton.min.css" rel="stylesheet" />
  <div id="header">
      <div class="container">
      </div>
  </div>
  <div id="heroarea">
      <div class="container">
          <span>
          <div  id="hero-intro-box" class="ten columns">
              <h1>Enjoy world-class Cuisines</h1>
              <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum</p>
              <div id="book-now-button"><span>Book us now!!</span></div>
          </div>
          </span>
      </div>
  </div>