body {
    background-color: #fbfbfb;
    margin: 0;
    padding: 0;
}

.tabs {
    position: fixed;
    top: 10px;
    right: 10px;
    font-size: 1.5em;
}
.tab {
    display: block;
    cursor: pointer;
    line-height: 2em;
}

.ctxs {
    width: 1080px;
    margin-left: auto;
    margin-right: auto;
}

.ctxs .ctx {
    display: none;
}

.on {
    display: block;
    color: blue;
}

a {
    text-decoration: none;
    /* 去除下划线 */
    color: blue;
     !important;
    /* 设置颜色 */
    cursor: pointer;
    /* 修改鼠标指针样式 */
}