.doc{
    display: flex;
    padding: 30px 0 60px;
    position: relative;
}
.menu{
    width: 200px;
    height: 400px;
    position: fixed;
    right: 30px;
    top: 50%;
    margin-top: -200px;
    z-index: 1;
    border-radius: 4px;
    padding: 10px 20px;
    box-shadow: 0 40px 60px 0 rgba(37, 59, 112, 0.1);
    border-left: 2px solid #13a49d;
}
.menu p{
    font-size: 20px;
    margin-bottom: 20px;
}
.menu a{
    font-size: 16px;
    display: block;
    line-height: 40px;
    color: #999999;
}
.menu a:hover{
    color: #13a49d;
}

.con{
    flex: 1;
}
.con h1 {
    font-size: 18px;
    text-align: center;
}
.con h2{
    font-size: 16px;
}
.con h3{
    font-size: 14px;
}
.con h1, .con h2{
    margin: 20px 0;
}
.con div{
    padding: 20px;
    border-radius: 10px;
    background: #f5f5f5;
    margin: 10px 0;
}
.con p{
    text-indent: 2em;
    font-size: 14px;
    color: #666;
}
.con img{
    width: 100%;
    height: auto;
}