实现6个骰子，如下图所示：
代码如下：
<html>
<head>
<style type="text/css">
#bg{
height: 200px;
outline: red dotted thin;
display: inline-flex; /*不用定义此容器的宽度，宽度根据容器元素进行自适应*/
}
.dice-base{
width: 100px;
height: 100px;
background-color: gray;
border: 2px solid green;
margin-right: 10px;
display: flex; /*flex布局*/
}
/*first dice*/
.dice-1{
margin-left: 10px;
justify-content: center; /*可以使子元素水平居中*/
}
.one{
width: 30px;
height: 30px;
background-color: red;
border-radius: 50%; /*画圆*/
align-self: center; /*使自己在垂直方向居中*/
}
/*second dice*/
.dice-2{
justify-content: space-between; /*使第一个元素左对齐，第二个元素右对齐*/
}
.two{
width: 30px;
height: 30px;
background-color: red;
border-radius: 50%;
}
.two:nth-child(2){ /*nth-child是选择器*/
align-self: flex-end; /*使第二个元素自身在垂直方向上底边对齐*/
}
/*third dice*/
.dice-3{
justify-content: space-between; /*使第一个元素左对齐，最后一个元素右对齐*/
}
.three{
width: 30px;
height: 30px;
background-color: red;
border-radius: 50%;
}
.three:nth-child(2){ /*nth-child是选择器*/
align-self: center; /*使第二个元素自身在垂直方向上居中*/
}
.three:nth-child(3){ /*nth-child是选择器*/
align-self: flex-end; /*使第二个元素自身在垂直方向上底边对齐*/
}
/*forth dice*/
.dice-4{
flex-wrap: wrap; /*当子元素超过父元素时在下一行显示*/
align-content: space-between; /*在垂直方向上两边对齐*/
}
.forth{
width: 30px;
height: 30px;
background-color: red;
border-radius: 50%;
}
.forth:nth-child(1){
margin-right: 40px; /*设置第一个元素右边距，使一行只放两个子元素*/
}
.forth:nth-child(3){
margin-right: 40px;
}
/*five dice*/
.dice-5{
flex-wrap: wrap; /*当子元素超过父元素时在下一行显示*/
align-content: space-between; /*在垂直方向上两边对齐*/
}
.five{
width: 30px;
height: 30px;
background-color: red;
border-radius: 50%;
}
.five:nth-child(1){
margin-right: 40px; /*设置第一个元素右边距，使一行只放两个子元素*/
}
.five:nth-child(3){
margin-right: 35px;
margin-left: 35px;
}
.five:nth-child(4){
margin-right: 40px;
}
/*six dice*/
.dice-6{
flex-wrap: wrap; /*当子元素超过父元素时在下一行显示*/
align-content: space-between; /*在垂直方向上两边对齐*/
justify-content: space-between;/*在水平方向上两边对齐*/
}
.six{
width: 30px;
height: 30px;
background-color: red;
border-radius: 50%;
}
</style>
</head>
<body>
<div id="bg">
<!-- first dice -->
<div class="dice-base dice-1">
<div class="one"></div>
</div>
<!-- second dice -->
<div class="dice-base dice-2">
<div class="two"></div>
<div class="two"></div>
</div>
<!-- third dice -->
<div class="dice-base dice-3">
<div class="three"></div>
<div class="three"></div>
<div class="three"></div>
</div>
<!-- forth dice -->
<div class="dice-base dice-4">
<div class="forth"></div>
<div class="forth"></div>
<div class="forth"></div>
<div class="forth"></div>
</div>
<!-- five dice -->
<div class="dice-base dice-5">
<div class="five"></div>
<div class="five"></div>
<div class="five"></div>
<div class="five"></div>
<div class="five"></div>
</div>
<!-- five dice -->
<div class="dice-base dice-6">
<div class="six"></div>
<div class="six"></div>
<div class="six"></div>
<div class="six"></div>
<div class="six"></div>
<div class="six"></div>
</div>
</div>
<script>
</script>
</body>
</html>
