#all {
    height: 1188px;
}



#d3 {
    width: 996px;
    height: 1000px;
    border: none;
    margin: 0 auto;
    background-color: #f7f2f2;
    font-size: 25px;
    font-family: STSong;
}

#d31 {
    width: 956px;
    height: 300px;
    border: none;
    margin: 5px 20px 0px 20px;
}

    #d31 p {
        font-size: 20px;
        font-family: 'Microsoft YaHei';
    }

#video {
    width: 800px;
    height: 600px;
    margin-left: 50px;
    margin-top:30px;
}

    #video p {
        font-family: 'Microsoft YaHei';
        color: #061570;
    }