@CHARSET "UTF-8";
/**********************audio***********************/
.btn_music{
    display:inline-block;
    width:35px;
    height:35px;
    background:url('../images/ad9e87ffb37644abb6e7543e9c796031.gif') no-repeat center center;
    background-size:100% auto;
    position:fixed;
    z-index:100;
    left:15px;
    top:20px;
    z-index:9999999;
}
.btn_music.on{
    background-image:url('../images/9ef968e4d88b4e8683cf30cdf2b10fcb.gif');
}