body {
    line-height: 30px;
    font-size: 18px;
}

.context {
    width: 1200px;
    padding: 20px;
    margin: 57px auto;
}
.img {
    margin-top: 10px;
    max-width: 800px;
}

h1 {
    margin: 20px 0 50px 0;
    font-size: 33px;
    text-align:center
}

h2 {
    margin-top: 70px;
    margin-bottom: 10px;
    font-size: 30px;
}

ol {
    margin-left: 15px;
}
li {
    margin-top:10px;
}

.title {
    font-weight: bold;
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 20px;
}