flex布局计算器
<!doctype html>
<html>
<head>
<style>
.box{
display: flex;
flex-direction: column;
height: 95vh;
background-color: #f1f3f3;
}
.box-content{
100%;
flex: 1;
}
.btns-rows{
100%;
flex: 1;
display: flex;
flex-direction: row;
background-color: #f7f8f9;
}
.btn{
text-align: center;
box-sizing: border-box;
flex: 1;
display: flex;
justify-content: center;
align-items: center;
border-top: 1px solid #c3c6c7;
}
.btn:not(:last-child){
border-right: 1px solid #c3c6c7;
}
.box-btns{
100%;
flex: 1;
display: flex;
flex-direction: column;
}
.btns-rows-left1{
flex: 3;display: flex;flex-direction: column;
}
.btns-rows-left2{
display: flex; flex-direction: row;flex-grow: 1;
}
#btns2{
flex: 2;display: flex;flex-direction: row;
}
#btns2-right{
border-left: 1px solid #c3c6c7;
}
.btn:active{
background-color: #888;
}
</style>
</head>
<body>
<div class="box">
<div class="box-content">
</div>
<div class="box-btns">
<div class="btns-rows">
<div class="btn">AC</div>
<div class="btn">DEL</div>
<div class="btn">/</div>
<div class="btn">*</div>
</div>
<div class="btns-rows">
<div class="btn">7</div>
<div class="btn">8</div>
<div class="btn">9</div>
<div class="btn">-</div>
</div>
<div class="btns-rows">
<div class="btn">4</div>
<div class="btn">5</div>
<div class="btn">6</div>
<div class="btn">+</div>
</div>
<div id="btns2" class="btns-rows">
<div class="btns-rows-left1">
<div class="btns-rows-left2">
<div class="btn">1</div>
<div class="btn">2</div>
<div class="btn">3</div>
</div>
<div class="btns-rows-left2">
<div class="btn">%</div>
<div class="btn">0</div>
<div class="btn">.</div>
</div>
</div>
<div id="btns2-right" class="btn">=</div>
</div>
</div>
</div>
</body>
</html>