body {
        width: 100%;
        height: 100%;
        margin: 0 auto;
        background-color: #ffffff;
    }

    .background {
        width: 100%;
        height: auto;
        min-width: 1200px;
        background-color: #ffffff;
    }

    /*banner*/
    .banner {
        background-image: url(banner.png);
        background-repeat: no-repeat;
        background-position: center top;
        background-size: auto 100%;
        width: 100%;
        height: 400px;
        margin-right: auto;
        margin-left: auto;
        min-width: 1200px;
    }

    /*主体*/
    .main {
        width: 100%;
        height: auto;
        min-width: 1200px;
        background-color: #ffffff;
        margin-top: 50px;
    }

    /*导语(图片)*/
    .div_img {
        width: 1200px;
        height: auto;
        margin: 0px auto 50px auto;
    }

    /* 各块 */
    .div_content {
        width: 1200px;
        height: auto;
        text-align: left;
        margin: 50px auto 0px auto;
    }

    /*视频资料*/
    .div_video {
        width: 1200px;
        margin-bottom: 30px;
    }
    
        .div_video ul {
            width: 1240px;
        }
    
        .div_video ul li{
            width: 380px;
            height: 290px;
            float: left;
            margin: 0px 30px 0px 0px;
            list-style: none;
        }
    
    .div_video_div {
        width: 380px;
        height: 210px;
        margin: 0px 0px 10px 0px;
        background-repeat: no-repeat;
        background-position: center top;
        background-size:100% 100%;
    }

    .div_video_text {
        width: 380px;
        height: 60px;
        background-image: url(point.png);
        background-position: 0px 5px;
        background-repeat: no-repeat;
        overflow: hidden;
    }

    /* 多行名称 */
    .div_video_text p {
        width: 365px;
        height: 52px;
        margin-left: 15px;
        font-family: 'Microsoft YaHei';
        font-size: 17px;
        font-weight: bold;
        line-height: 26px;
        text-align: justify;
        color: #000000;
        overflow: hidden;
    }

    /*版权*/
    .bottom {
        width: 1200px;
        min-width: 1200px;
        height: 120px;
        border-top: 4px solid #D9001B;
        line-height: 180%;
        margin-top: 0px;
    }

        .bottom div p span {
            font-family: 'Microsoft YaHei';
            font-size: 16px;
            color: #3c3b3b;
        }