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From 2013.igem.org

div.contain { font: 18px Arial, Helvetica, sans-serif; margin:0 auto; width:1000px; height:auto; /*border:1px #000 solid;*/ }

1. title {

       margin-top:110px;

}

1. Tutorial {

margin-left:0; height:auto; }

1. Tutorial .left {

width:490px; height:450px; float:left; }

1. Tutorial .right {

width:490px; float:right; height:380px; padding-top:70px; }

1. code {

      margin-top:50px;

}

1. download img {

width:60px; height:60px; }

a:hover { text-decoration:none; }