body,
 div,
 ul,
 li {
     margin: 0;
     padding: 0;
 }
 
 ul {
     list-style: none;
 }
 
 img {
     border: 0;
 }
 
 .large_box {
     margin-bottom: 10px;
     height: 260px;
     overflow: hidden;
 }
 
 .large_box img {
     display: block;
 }
 
 .small_box {
     width: 830px;
     height: 100px;
     overflow: hidden;
 }
 
 .small_list {
     position: relative;
     float: left;
     width: 705px;
     height: 100px;
     overflow: hidden;
     margin-left: 30px;
 }
 
 .small_list ul {
     height: 100px;
     overflow: hidden;
 }
 
 .small_list ul li {
     position: relative;
     float: left;
     margin-right: 10px;
     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: 100px;
     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: 100px;
     /* background-color: #777; */
     background-repeat: no-repeat;
     background-position: center center;
     cursor: pointer;
 }
 /* .btn:hover {
     background-color: #e7000e;
 } */
 
 .left_btn {
     margin-left: 10px;
     float: left;
     margin-right: 10px;
     background-image: url(../img/left_btn.png);
     filter: drop-shadow(5px 0 0 #888);
 }
 
 .right_btn {
     margin-right: 20px;
     float: right;
     background-image: url(../img/right_btn.png);
     filter: drop-shadow(5px 0 0 #888);
 }