.img-600 {
    float: left;
    width: 600px;
    height: auto;
    overflow: hidden;
    margin-bottom: 20px;
}

.large_box {
    margin-bottom: 10px;
    width: 600px;
    height: 400px;
    overflow: hidden;
   
}
.large_box img {
    display: block;
    width: 600px;
    height: 400px;
}
.small_box {
    width: 600px;
    height: 75px;
    overflow: hidden;
}
.small_list {
    position: relative;
    float: left;
    width: 420px;
    height: 75px;
    overflow: hidden;
}
.small_list ul {
    height: 75px;
    overflow: hidden;
}
.small_list ul li {
    position: relative;
    float: left;
    margin-right: 10px;
    width: 112px;
}
.small_list ul li img {
    display: block;
    width: 112px;
}
.small_list ul li .bun_bg {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 112px;
    height: 75px;
    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: 30px;
    height: 75px;
    background-color: #999;
    background-repeat: no-repeat;
    background-position: center center;
    cursor: pointer;
}
.btn:hover {
    background-color: #f53;
}
.left_btn {
    float: left;
    margin-right: 10px;
    background-image: url(../images/left_btn.png);
    background-size: 40% auto;
}
.right_btn {
    float: left;
    background-image: url(../images/right_btn.png);
    background-size: 40% auto;
}


.large_box ul li {
    position: relative;
    width: 600px;
    height: 400px;
}

.large_box ul li span {
    position: absolute;
    left: 0;
    top: 0;
    width: 600px;
    height: 400px;
    display: block;
    z-index: 99;
    cursor: pointer;
}

.large_box ul li span img {
    width: 50px;
    height: 50px;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -25px;
    margin-top: -25px;
}

.small_list ul li {
    position: relative;
    cursor: pointer;
}

.small_list ul li span {
    width: 30px;
    height: 30px;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -15px;
    margin-top: -15px;
    background: url('../images/viede0-icon.png') no-repeat center center;
    background-size: contain;
}

.video-box {
    position: absolute;
    left: 0;
    top: 0;
    width: 600px;
    height: 400px;
    z-index: 99;
    display: none;
    background: #000;
}

.video-box #sp {
    width: 100%;
    height: 400px;
}

.ad_baojia{
    float: right;
    width: 100px;
    height: 75px;
    padding: 0;
}

.ad_baojia a{
    width: 100px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    padding: 0;
    margin-top: 0;
    margin-bottom: 15px;
}

.cx-titleft{
    width: 100%;
    color: #666;
    font-size: 16px;
    margin-bottom: 10px;
}