CSS三角形强化
<style>
.box1 {
width: 0;
height: 0;
/*把上边框宽度调大*/
border-top: 100px solid transparent;
border-right: 50px solid skyblue;
/*左边和下边的边框宽度设置为0*/
border-bottom: 0 solid blue;
border-left: 0 solid green;
}
/* .box1 {
border-color: transparent red transparent transparent;
border-style: solid;
border-width: 100px 50px 0 0;
} */
</style>
<body>
<div class="box1"></div>
</body>
案例：
<style>
.clearfix::after {
content: "";
display: block;
clear: both;
}
.box {
width: 140px;
margin: 0 auto;
border: 1px solid red;
}
.box .miaosha {
position: relative;
float: left;
width: 70px;
height: 20px;
line-height: 20px;
text-align: center;
background-color: red;
}
.box .yuanjia {
float: left;
width: 70px;
height: 20px;
line-height: 20px;
text-align: center;
color: #ccc;
font-size: 12px;
text-decoration: line-through;
}
.box .miaosha i {
position: absolute;
top:0;
right: 0;
width: 0;
height: 0;
border-color:transparent white transparent transparent;
border-style: solid;
border-width: 20px 10px 0 0;
}
</style>
<body>
<div class="box clearfix">
<span class="miaosha">
1690.00
<i></i>
</span>
<span class="yuanjia">2000.00</span>
</div>
</body>
