<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<style type="text/css">
/* 彈框樣式 */
.bom_bg{width: 100%;height:100%; background:rgba(0, 0, 0,0.85); position: fixed; top:0; left:0;}
.bom_bg .bom_one{width:320px; padding:0 15px; height:218px; background:#fff; border-radius:10px; position: absolute; top:0%; left:50%; transform:translate(-50%,-50%); animation: bomaction 0.3s linear forwards;}
.bom_bg .bom_one .bom_top_bor{width: 100%; height: 48px; font-size: 22px; color: #ff4b49; line-height: 48px; border-bottom: 2px solid #c15a47; text-align: center;}
.bom_center{height: 113px; line-height: 123px; text-align: center; font-size: 18px;}
.bom_bottom{height: 55px; text-align: center; color: #202020; font-size: 16px;}
.bom_bottom span{height: 38px; width: 125px; background: #ff4b49; cursor: pointer; display: inline-block; border-radius: 20px; line-height: 40px; color: #fff;}
/* 彈框動畫效果 */
@keyframes bomaction{
0%{
top:0%;
}
46%{
top:52%;
}
48%{
top:48%;
}
50%{
top:52%;
}
52%{
top:48%;
}
54%{
top:52%;
}
56%{
top:48%;
}
57%{
top:50%;
}
100%{
top:50%;
}
}
</style>
<body>
<div class="bom_bg">
<div class="bom_one">
<div class="bom_top_bor">溫馨提示</div>
<div class="bom_center">哈哈哈哈哈</div>
<div class="bom_bottom"><span>知道了</span></div>
</div>
</div>
</body>
</html>