body {
    font-family: "microsoft yahei", "Times New Roman", "宋体", Times, serif;
    letter-spacing: 1px;
}

.margin-top-5 {
    margin-top: 5px;
}

.margin-top-10 {
    margin-top: 10px;
}

.margin-top-15 {
    margin-top: 15px;
}

.margin-top-20 {
    margin-top: 20px;
}

.margin-bottom-5 {
    margin-bottom: 5px;
}

.margin-bottom-10 {
    margin-bottom: 10px;
}

.fa.pull-left {
    padding: 4px 0;
}