body {
  font-size: 90%;
  width:750px;
  margin-right: auto;
  margin-left : auto;
  font-family:font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", "メイリオ", Meiryo, Osaka, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
  line-height: 200%;
  background-color:#f0f8ff;
  text-align: left;
}


 #blocka {
   float:left;
   width: 500px;
}
 #blockb{
   margin-left:500px;
 }

a {
  text-decoration:none;
  color:black;
}


p{
    text-align:left;
}

h2 {
  padding: 0.4em 0.5em;/*文字の上下 左右の余白*/
  color: #000000;/*文字色*/
  background: #f4f4f4;/*背景色*/
  border-left: solid 5px #7db4e6;/*左線*/
  border-bottom: solid 3px #d7d7d7;/*下線*/
}

abstruct{
font-family: 'Gotham Medium',museo_sans_500regular,'museo-sans',Arial,sans-serif;
font-size: 20px;
padding: 0.5em 1em;
background: #f4f4f4
}

.box11{
width: 600px;    
padding:0.5em 3em;
    margin: 2em 0;
    color: #5d627b;
    background: white;
    border-top: solid 5px #5d627b;
    box-shadow: 0 3px 5px rgba(0, 0, 0, 0.22);
}
.box11 p {
    margin: 0; 
    padding: 0;
}

ul {
  list-style: none;
}

ol {
  list-style-type: none;
  margin-left: -1em; 
}

ol li {
  counter-increment: cnt;
}

ol li:before {
  content: counter(cnt) ") ";
  display:inline-block;
  margin-left:-2em; 
  width: 2em; 
}