#span_path{
    background: lightyellow;
}

table{
    border-collapse: collapse;
}
table tr:hover{
    background-color: yellow;
}

div{
    padding-bottom: 3px;
    padding-top: 2px;
}

.red{
    color: red;
}

.blue{
    color: blue;
}

.right{
    position: fixed; /* 默认:static; 其他:relative, absolute, fixed */
    right: 4px;
}

.right a {                  /* 取消标题导航栏a元素的下划线 */
    text-decoration: none;  /* none, underline, overline, line-through, blink */
}