一段CSS+JS直观的底部浮动搜索框效果代码，实现PC移动端底部浮悬代码。

CSS代码

* {margin:0px; padiing:0px;}
.login_alert{position:fixed;bottom:0px;left:0px;width:100%;z-index:9999;}
.login_alert_close{position:absolute;top:-10px;right:0px;z-index:1;cursor:pointer;}
.login_alert_box{width:100%;text-align:center; background-color:rgba(61, 61, 61, 0.6); height:60px;}
.login_alert_box div{cursor:default; font-family:'微软雅黑'; color:#66CCFF; font-size:26px; font-weight:bold; line-height:80px;}
.login_alert_box div a{text-decoration:none;display:inline-block;padding:5px 20px; font-size:20px; color:#000; background-color:#00CC99; border-radius:4px; line-height:26px;}
.login_alert_box div span{font-size:18px;}
.login_alert{animation:show_alert_left 1.6s;-webkit-animation:show_alert_left 1.6s;-moz-animation:show_alert_left 1.6s;}
.login_alert_box{background-color:rgba(0,0,0,0.6);height:60px;}
.login_alert_box:hover{background-color:rgba(0,0,0,0.8);}
.login_alert_box div{color:#66CCFF;font-size:26px;line-height:60px;}
.login_alert_box div a{font-size:20px;line-height:200px;border-radius:4px;}
@keyframes show_alert_left{
from{left:-100%;}
to{left:0px;}
}
@-webkit-keyframes show_alert_left{
from{left:-100%;}
to{left:0px;}
}
@-moz-keyframes show_alert_left{
from{left:-100%;}
to{left:0px;}
}

HTML代码