body{
    background: #f6f6f6;color:#555;
}
.content{
    width: 1000px;
    margin: 30px auto;
    font-size: 14px;
    position: relative;
    background-color: #fff;
    padding:50px;
}
.content p{
    text-align: center;
    font-size: 24px;
    font-weight: 900;
    color:#333;
    line-height: 70px;
}
pre{
    white-space: pre-wrap; /*css-3*/
    white-space: -moz-pre-wrap; /*Mozilla,since1999*/
    white-space: -pre-wrap; /*Opera4-6*/
    white-space: -o-pre-wrap; /*Opera7*/
    word-wrap: break-word; /*InternetExplorer5.5+*/
}