body {
    font-family: 'Nunito', sans-serif, 'Gentium', '黑体', '宋体';
    font-size: 1.2em;
}

.book-units {
    padding-left: 30px;
    list-style: none;
}

.unit-articles ul {
    list-style: none;
    padding-left: 0;
}

.unit-articles ul > li {

}

.articles {
}

.articles .article {
    margin-bottom: 0.5em;
    border-top: #7c858e 1px dashed;
}

.paragraphs {
}

.paragraphs .paragraph {
    border-color: #21b978;
    padding: 3px 5px;
    position: relative;
}

.talks {
    float: left
}

.talks .talk {
    position: relative;
}

.sentences {
    float: left;
    margin-bottom: 5px;
    border-width: 2px;
    border-radius: 3px;
    border-color: #00AFEF;
}

.sentence_head {
    display: inline-block;
    padding: 5px;
}

.sentences > .sentence {
    display: inline-block;
    padding: 5px;
    border-bottom: #7c858e 1px dashed;
    word-break: break-word;
}

a {
    color: #333;
    text-decoration: none;
}

a.visited {
    color: #ff0202;
    font-weight: bold;
    font-size: 1.2em;
}

.to-top {
    font-size: 1.5em;
}