.pc_notice{
    display: none!important;
}
.data_box .off_nav {
    height: 1.5rem;
}

.data_box .course_menu {
    width: 100%;
    min-height: 100vh;
    font-family: "微软雅黑";
}

.data_box .arr {
    display: none;
}

.data_box .course_list {
    float: right;
    width: 60%;
    height: 100vh;
    overflow-y: auto;
    background-color: #bdd7ee;
}

.data_box .course_list::-webkit-scrollbar {
    display: none;
}

.data_box .course_cat {
    float: left;
    width: 40%;
    height: 100vh;
    overflow-y: auto;
    background: #deebf7;
}

.data_box .course_cat::-webkit-scrollbar {
    display: none;
}

.data_box .course_cat table,
.data_box .course_cat table tr {
    width: 100%;
    height: inherit;
}

.data_box .course_cat_title {
    display: block;
    text-align: right;
    font-weight: normal;
    font-size: .7rem;
    color: #9cc2e5;
    cursor: pointer;
    padding: .2rem .3rem .2rem 0;
}

.data_box .show_current {
    font-weight: 700;
    color: #0070c0;
    /*line-height: 1rem;*/
    background-color: #bdd7ee;
}

.data_box .course_item_title > span {
    color: #b1bbc1;
    font-size: 0.6rem;
    text-align: center;
}

.data_box .course_item_detail > a {
    display: block;
    font-size: .6rem;
    color: #464646;
    padding: .2rem 0;
    font-weight: 500;
}

.data_box .course_item_detail > a:hover {
    background: hsla(0, 0%, 100%, .3);
}