html,body {
    font-family: Helvetica, 'Hiragino Sans GB', STXihei, 'Microsoft Yahei', '微软雅黑', Arial, sans-serif !important;
}

.book.font-family-1 {
    font-family: Helvetica, 'Hiragino Sans GB', STXihei, 'Microsoft Yahei', '微软雅黑', Arial, sans-serif !important;   
}
.markdown-section sup {
    font-size: .7em;
    color: #E05050; 
}

.markdown-section pre,
.markdown-section code {
    border-radius: 5px;
    border: solid 1px #efefef;
}

.markdown-section pre code {
    border-radius: 0;
    border: none;
}