body,div,ul,li{margin:0;padding:0;}
ul{list-style:none;}
img{border:0;}
.content-txt .banner img{max-width:auto;width:100%}
.banner{margin:0 auto 0;width:640px;overflow:hidden;}
.large_box{margin-bottom:10px;height:350px;overflow:hidden;}
.large_box img{display:block;}
.small_box{height:73px;overflow:hidden;}
.small_list{position:relative;float:left;width:590px;height:73px;overflow:hidden;}
.small_list ul{height:73px;overflow:hidden;}
.small_list ul li{position:relative;float:left;margin-right:8px;width:110px;}
.small_list ul li img{display:block;}
.small_list ul li .bun_bg{display:none;position:absolute;top:0;left:0;width:110px;height:73px;background:#000;filter:alpha(opacity=60);-moz-opacity:0.6;-khtml-opacity:0.6;opacity:0.6;}
.small_list ul li.on .bun_bg{display:block;}
.btn{display:block;width:20px;height:73px;background-color:#777;background-repeat:no-repeat;background-position:center center;cursor:pointer;}
.btn:hover{background-color:#e7000e;}
.left_btn{float:left;margin-right:10px;background-image:url(./left_btn.png);}
.right_btn{float:right;background-image:url(./right_btn.png);}