形状方形效果

Question

我开始使用CSS3做一个简单的形状或方形，但我卡住了，你知道我怎么能在下面产生效果？

图：

我的CSS：

.square{
    width: 150px; 
    height: 100px; 
    -webkit-transform: skew(20deg); 
    -moz-transform: skew(20deg); 
    -o-transform: skew(20deg); 
    background: red;
}

Answer 1

是。您应该可以使用perspective，perspective-origin和transform: rotateY()

的组合

例如：

/* Need a wrapper to use perspective */
#div1 {
    position: relative;
    height: 150px;
    width: 150px;
    margin: 50px;
    padding: 10px;
    border: 1px solid black;
    -webkit-perspective: 150px; /* Chrome, Safari, Opera */
    -webkit-perspective-origin: 50% 50%; /* Chrome, Safari, Opera */
    perspective: 150px;
    perspective-origin: 50% 50%;
}

/* Apply rotateY() to child */
#div2 {
    padding: 50px;
    position: absolute;
    background-color: red;
    -webkit-transform: rotateY(25deg); /* Chrome, Safari, Opera */
    transform: rotateY(25deg);
}

/* CSS triangle trick */
#div2::after {
    content: "";
    position: absolute;
    bottom: -19px;
    left: 50%;
    margin-left: -20px;
    width: 0;
    height: 0;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;
    border-top: 20px solid red;
}

<div id="div1">
  <div id="div2">HELLO</div>
</div>

Answer 2

您可以使用三角形边框创建它。

#box {
    width: 300px;
    height: 150px;
    border-left: 400px solid #e3dd2d;
    border-top: 30px solid transparent;
    border-bottom: 30px solid transparent;
    position: relative;
}
#box:after {
    content: "";
    position: absolute; 
    width: 0; 
    height: 0; 
    border-left: 25px solid transparent;
    border-right: 25px solid transparent;   
    border-top: 70px solid #e3dd2d;
    position: absolute;
    left: -220px;
    bottom:-80px;   
}

<强> Example

<强>更新

#box {
        width: 300px;
        height: 150px;
        border-left: 400px solid #e3dd2d;
        border-top: 30px solid transparent;
        border-bottom: 30px solid transparent;
        position: relative;
    }
    #box:after {
        content: "";
        position: absolute; 
        width: 0; 
        height: 0; 
        border-left: 25px solid transparent;
        border-right: 25px solid transparent;   
        border-top: 70px solid #e3dd2d;
        position: absolute;
        left: -220px;
        bottom:-80px;   
    }
    #box div {
        display: table;
        margin-left: -400px;
        text-align: center;  
    }
    #box div span{  
        display: table-cell;
        width: 400px;  
        height: 150px;
        vertical-align: middle;  
    }

<div id="box">
    <div>    
        <span>
            Some text inside           
        </span>
    </div>  
</div>

<强> UPDATED EXAMPLE