task2.css

*{margin:0;padding:0}
body{
    background: #DEDEDE;
}
#top{
    background: black;
    height: 60px;

}
#top #log img{
    float:left;
    margin-left:50px;
    margin-top:10px;
}
#top #menu ul li{
       float:right;
        display: inline;
        color:#fff;
        margin:20px 20px 0 0;
 }
.content{
    padding:30px 15px 20px 15px;
    background: #fff;
    margin-top:20px;
    margin-left:15px;
    border-bottom: 5px solid gray;

}
 p.suojin{
     text-indent: 2em;
 }
 .content table{
     width:100%;
     line-height: 2;

 }
 .content #t1{
    margin-left:200px;
     font-size: 12px;

 }
 .content .left{
     text-align: right;
     margin-right:5px;
     padding-right: 20px;

 }
 .content #btn{
     width: 90%;
     background: blue;
     color:#fff;
     height: 50px;
     border-radius: 15px;
     margin-left:50px;
 }
#bottom{
    margin-top: 20px;
    background: black;
    color:#fff;
    width:100%;

    text-align: center;
    height: 60px;
    line-height:3.5;

}