#demo1{ 
    position: relative;    
    margin-top: 10px;
    width: 100%;     
}
#demo1 .img_list{overflow: hidden; position: relative; height: 380px;}
/* 根据图片的张数来设定ul的宽度 */
.img_list ul{ width: 3500px; position: absolute; height: 380px; left: 0px;}
.img_list li{ float: left; width: 700px;}
.img_list img{ margin: 1px; width: 575px; height: 380px;}

/* 图片对应的按钮样式 */
.btn_list ul{ position: absolute; right: 20px; bottom: 35px; }
.btn_list li{ float: left; margin-right: 10px; color: #999; border: 1px solid #ccc; }
.btn_list li:hover,.btn_list li.on{ cursor: pointer; border: 1px solid #E204A4;}
.btn_list li img{ width: 30px; height: 15px; display: block;}
/* 左右点击的按钮样式 */
#demo1 .toLeft,#demo1 .toRight{
    display: none;
    position: absolute;
    width: 20px;
    height: 30px;    
    top: 170px;    
    background: url(../images/zbbg_24.png) no-repeat 0 -150px;
}

/* 图片对应的说明*/
.img_intro{
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 25px;
display:none;
}
.btn_list{display:none;}
.img_intro .img_intro_bg,.img_intro .text{
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}
.img_intro .img_intro_bg{
    background: #000;    
    opacity: .3;
    z-index: 999;
}
.img_intro .text{
    padding: 5px 10px;
    z-index: 1000;
    color: #999;
}
#demo1 .toLeft{
    left: 30px;
}
#demo1 .toRight{
    right: 30px;
    background-position: -50px -150px;
}