body {
    background: rgba(12, 100, 129, 1) url('https://images.cnblogs.com/cnblogs_com/Penn000/1013849/o_fr.jpg') fixed no-repeat;
    background-position: 50% 5%;
    background-size: cover;
}
#blogTitle h1 {
    font-size: 36px;
    font-weight: bold;
    line-height: 1.8em;/*原始 1.6em*/
    margin-top: 10px;/*原始 15px */
    color: #548B54;
}
.blogpost-body {
    font-size: 15px;
}