<!--html盒子代码-->
<!--水平垂直居中-->
 
<div class="Centered1">
    <p>d第一种</p>
</div>
 
<!-css样式部分-->
   .Centered1{
            background-color: #800070;
            width: 100%;
            height:500px;
            position: relative;
        }
    .Centered1 p{
            width: 200px;
            height: 200px;
            background-color: deeppink;
            line-height: 200px;
            text-align: center;
            position: absolute;
            left: 0;
            bottom: 0;
            right:0;
            top: 0;
            margin: auto;
        }
 

<!--html盒子代码-->
<!--水平垂直居中-->
 
<div class="Centered2">
    <p>d第二种</p>
</div>
 
<!-css样式部分-->
/*第二种方法水平垂直居中*/
    .Centered2{
            background-color: #ef8518;
            width: 100%;
            height: 500px;
            position: relative;
        }
    .Centered2 p {
            position: absolute;
            width: 200px;
            height: 200px;
            background-color:red;
            line-height: 200px;
            text-align: center;
            left: 50%;
            top:50%;
            margin-left:-100px;
            margin-top: -100px;
        }
 

<!--html盒子代码-->
<!--水平垂直居中-->
 
<div class="Centered3">
    <p>d第三种</p>
</div>
 
<!-css样式部分-->
/*第三种方法水平垂直居中*/
    .Centered3{
            background-color: dimgrey;
            width: 100%;
            height: 500px;
            position: relative;
        }
    .Centered3 p {
            position: absolute;
            width: 200px;
            height: 200px;
            background-color:darkorange;
            line-height: 200px;
            text-align: center;
            left: 50%;
            top: 50%;
            transform:translate(-50%,-50%);
        }    
 

<!--html盒子代码-->
<!--水平垂直居中-->
 
<div class="Centered4">
    <p>d第四种</p>
</div>
 
<!-css样式部分-->
/*第四种方法水平垂直居中,老版本flex布局*/
    .Centered4{
            background-color: #FF4444;
            width: 100%;
            height: 500px;
            display: -webkit-box;
            -webkit-box-pack:center;
            -webkit-box-align: center;
        }
    .Centered4 p {
            width: 200px;
            height: 200px;
            background-color:cadetblue;
            line-height: 200px;
            text-align: center;
        }
 

<!--html盒子代码-->
<!--水平垂直居中-->
 
<div class="Centered5">
    <p>d第五种</p>
</div>
 
<!-css样式部分-->
/*第五种方法水平垂直居中,新版本的flex水平垂直居中*/
    .Centered5{
            background-color: darkslateblue;
            width: 100%;
            height: 500px;
            display: flex;
            justify-content:center;
            align-items: center;
        }
    .Centered5 p {
            width: 200px;
            height: 200px;
            background-color:fuchsia;
            line-height: 200px;
            text-align: center;
        }