.content {
    width: 1200px;
    margin: 0 auto;
    margin-top: 30px;
    display: flex;
    justify-content: space-between;
}

.content_left {
    flex-shrink: 0;
    width: 280px;
    box-shadow: 3px 5px 20px 0px rgba(223, 223, 223, 0.45);
    background: #FFFFFF;
    border-radius: 10px;
    align-self: baseline;

}

.content_left_top {
    height: 60px;
    font-size: 20px;
    padding-left: 20px;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    border-bottom: 1px solid #DBDBDB;
}

.content_left_top img {
    margin-right: 6px;
}

.content_left_nav_item {
    height: 99px;
    padding: 26px 20px;
    display: flex;
    border-bottom: 1px #DBDBDB dashed;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
}

.content_left_nav_item_title {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.content_left_nav_item_title img {
    width: 14px;
    height: 14px;
}

.content_left_nav_item_info {
    font-size: 14px;
    display: flex;
    justify-content: space-between;
}

.content_left_nav_item_info a,
.content_left_nav_item_info a:hover {
    color: #666666;
    text-decoration: none;
}

.content_left_nav_item:last-child {
    border-bottom: none;
}

.content_right {
    /* height: 1362px; */
    width: 893px;
}

.content_right_top {
    width: 893px;
    height: 110px;
    background: #FFFFFF;
    box-shadow: 3px 5px 20px 0px rgba(223, 223, 223, 0.45);
    border-radius: 10px;
}

.content_right_search {
    height: 60px;
    font-size: 20px;
    padding-left: 20px;
    padding-right: 20px;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #DBDBDB;
}

.content_right_search_right {
    display: flex;
    width: 250px;
    align-items: center;
    cursor: pointer;
}

.content_right_search_right input {
    border-radius: 17px 0 0 17px;
    width: 215px;
    border: none;
    height: 34px;
    border: 1px solid #DBDBDB;
    border-right: none;
    padding-left: 12px;
    box-sizing: border-box;
    font-size: 14px;
}

.content_right_search_right input:focus-visible {
    outline: none;
}

.search_btn {
    width: 34px;
    height: 34px;
    border-radius: 0 17px 17px 0;
    border: 1px solid #DBDBDB;
    border-left: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search_btn img {
    width: 16px;
    height: 16px;
}

input[type="radio"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    outline: none;
    display: block;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background-size: 100% auto;
    box-sizing: border-box;
    border: solid 1px #FF6F02;
    background-color: transparent;
}

/*单选按钮选中后增加的样式*/
input[type="radio"]:checked:before {
    content: "";
    display: block;
    width: 9px;
    height: 9px;
    margin: 1px;
    border-radius: 10px;
    background-color: #FF6F02;
}

.content_right_judge {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 50px;
}

.content_right_judge_left {
    display: flex;
    font-size: 14px;
}


.content_right_judge_left div {
    margin-right: 20px;
}

.content_right_judge_left .isActive {
    color: #FF6F02;
}

label {
    margin-bottom: 0;
}

.content_right_judge_right {
    display: flex;
    align-items: center;
}

.content_right_judge_right>div {
    display: flex;
    align-items: center;
}

.content_right_judge_right>div {
    margin-right: 20px;
}

.content_right_judge_right div input {
    margin-right: 5px;
}

.content_right_all {
    height: 55px;
    line-height: 55px;
    font-size: 12px;
}

.content_right_all span {
    color: #FF6F02;
}

.content_right_items {
    display: none;
    flex-wrap: wrap;
    justify-content: space-between;
    overflow: hidden;

}

.content_right_items.isActive {
   display: flex;
}

.content_right_item {
    width: 280px;
    height: 270px;
    background: #FFFFFF;
    box-shadow: 3px 5px 20px 0px rgba(223, 223, 223, 0.45);
    border-radius: 10px;
    padding: 18px 21px;
    margin-bottom: 30px;
}


.content_right_item_tit {
    font-size: 16px;
    color: #333333;
    line-height: 42px;
}

.content_right_item_txt {
    padding: 8px 16px;
    width: 238px;
    height: 55px;
    background: #FAFAFA;
    border-radius: 6px;
    font-size: 12px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}



.content_right_item_txt span {
    color: #FF6F02;
}

.list-inline>li {
    display: inline-block;
    padding-right: 5px;
    padding-left: 5px;
}

.pagination-df {
    margin-bottom: 0;
    text-align: center;
    cursor: pointer;
}

.pagination-df li a {
    color: #666 !important;
    text-decoration: none !important;
    font-size: 14px;

}

/* .pagination-df a {
    display: inline-block;
    width: 32px;
    height: 32px;
    line-height: 32px;
    text-align: center;
    border-radius: 50%;
} */

.pagination-df .active {
    color: #fff !important;
    background-color: #FF6F02;
    display: inline-block;
    width: 32px;
    height: 32px;
    line-height: 32px;
    text-align: center;
    border-radius: 50%;
}

/* .bi-caret-down-fil {
    -webkit-transition: all .3s linear 0s;
    transition: all .3s linear 0s;
} */

.teachers {
    cursor: pointer;
}

/* .teachers:hover .dropdown-toggle::after {
    -webkit-transform: rotate(180deg);
    -webkit-transition: all .3s linear 0s;
    transition: all .3s linear 0s;
} */

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu.teacher-filter {
    width: 300px;
}

.dropdown-menu a {
    text-decoration: none;
    font-size: 14px;
}

.dropdown-menu a.active,
.dropdown-menu a:hover {
    color: #FF6F02
}

.dropdown-menu a i {
    display: inline-block;
    margin-right: 10px;
    width: 18px;
    height: 18px;
    background-color: #dcdcdc;
    border-radius: 3px;
    vertical-align: middle;
}

.dropdown-menu a.active i {
    background: #FF6F02 url(https://al3.acc5.com/179227_5dba4b22bfb3e.png) no-repeat center center;
}

.dropdown-menu.course-filter {
    min-width: 232px;
}

.sort-filter-list a {
    color: #888;
}

.teacher-filter .all {
    width: 50px;
    line-height: 25px;
    background-color: #c5c5c5;
    color: #fff;
    border-radius: 6px;
}

.teacher-filter .all.active,
.teacher-filter .all:hover {
    background-color: #FF6F02 #fff;
}

.teacher-filter dl {
    margin-bottom: 15px;
}

.teacher-filter dl.last {
    margin-bottom: 0;
}

.teacher-filter dl dt i {
    display: inline-block;
    width: 20px;
    height: 20px;
    line-height: 20px;
    background-color: #c5c5c5;
    color: #fff;
    text-align: center;
    font-style: normal;
    font-weight: normal;
    border-radius: 4px;
}

.teacher-filter dl dt i.active {
    background-color: #333;
}



dt,
dd {
    display: inline-block;
}

.pd-20 {
    padding: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.teacher-filter dl dt i {
    display: inline-block;
    width: 20px;
    height: 20px;
    line-height: 20px;
    background-color: #c5c5c5;
    color: #fff;
    text-align: center;
    font-style: normal;
    font-weight: normal;
    border-radius: 4px;
}

.teacher-filter dl dd {
    margin-left: 20px;
}

.dropdown-menu a {
    display: inline-block;
    width: 70px;
}

.dl-horizontal {
    display: flex;
}

.s-menu {
    display: none;
    z-index: 100000000;
}

.content_left_nav_item {
    position: relative;
}



@media screen and (min-width:751px) {
    .content_left_nav_item:hover .s-menu {
        display: block;
    }

    .s-menu {
        position: absolute;
        top: 0 !important;
        left: 100%;
        width: 157px;
        /* height: 349px; */
        background: #FFFFFF;
        box-shadow: 4px 7px 28px 0px rgba(169, 169, 169, 0.75);
        border-radius: 10px;
        padding: 5px 0;

    }
}

.s-menu div {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
}

.s-menu a {
    display: block;
    width: 137px;
    height: 48px;
    line-height: 48px;
    border-radius: 0px 6px 6px 0px;
    padding-left: 24px;
    margin: 0 auto;
}




.s-menu a:hover {
    padding-left: 23px;
    background: #F5F8FA;
    border-left: 1px solid #FF6F02;
}

  .content_left_nav .isActive .content_left_nav_item_title {
        color: #FF6F02;
    }
    
    .content_right_item a{
        text-decoration: none;
    }
@media screen and (max-width:750px) {

    .content_left_nav_item_info,
    .content_right_judge_right {
        display: none;
    }

    .content_left {
        width: 7.02rem;
        /* height: 2.05rem; */
        border-radius: .1rem .1rem 0 0;
        margin: 0 auto;
        /* margin-bottom: 1.85rem; */
    }

    .content {
        display: block;
    }

    .content_left_nav {
        display: flex;
        flex-wrap: nowrap;
    }

    .content_left_top {
        height: 1.2rem;
        padding-left: .42rem;
    }

    .content_right {
        width: 100%;
    }

    .content_left_nav {
        /* height: 1.95rem; */
        height: 3.35rem;
        padding-left: .42rem;
        position: relative;
    }

    .content_left_nav_item {
        white-space: nowrap;
        padding: 0;
        height: 1.25rem;
        line-height: 1.25rem;
        border-bottom: none !important;
        margin-right: .2rem;
    }

    .content_left_nav_item_title img {
        display: none;
    }

    .content_right {
        height: auto;
    }

    .content {
        margin-top: .2rem;
    }

    .content_right_top,
    .content,
    .content_right {
        width: 100%;
    }

    .content_right_items {
        display: none;
    }
    .content_right_items.isActive {
        display: block;
    }

    .content_left_nav {
        overflow-x: auto;
    }

    .s-menu {
        position: absolute;
        /* top: 3.75rem; */
        /* left: 0.24rem; */
        left: -0.42rem;
        bottom: -1.4rem;
        width: 7.02rem;
        height: 1.4rem;
        background-color: #fff;
        border-radius: 0 0 .1rem .1rem;

    }

    .s-menu div {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .s-menu div a {
        flex: 1;
        padding-left: .42rem;
    }

  

    .content_left_nav .isActive .s-menu {
        display: block;
    }

    .content_right {
        width: 7.02rem;
        /* margin-top: */
        margin: .3rem auto;
    }

    .content_right_top {
        height: 2.22rem;
    }

    .content_right_search {
        height: 1.2rem;
        font-size: .4rem;
    }

    .content_right_search_right input {
        border-radius: .34rem 0 0 .34rem;
        width: 4.3rem;
        border: none;
        height: .68rem;
        border: 1px solid #DBDBDB;
        border-right: none;
        padding-left: .24rem;
        box-sizing: border-box;
        font-size: .24rem;
    }

    .search_btn img {
        width: .32rem;
        height: .32rem;


    }

    .search_btn {
        width: .68rem;
        height: .68rem;
        border-radius: 0 .34rem .34rem 0;

    }

    .content_right_judge {
        display: flex;
        height: 1.02rem;
    }

    .content_right_judge div {
        flex: 1;
        margin-right: 0;
        text-align: center;
    }

    .content_right_all {
        height: 1rem;
        padding-left: .24rem;
        font-size: .24rem;
    }

    .content_right_item {
        width: 7.02rem;
        height: 6.77rem;
        background: #FFFFFF;
        box-shadow: 3px 5px 20px 0px rgba(223, 223, 223, 0.45);
        border-radius: .2rem;
        padding: .45rem .53rem;
        margin-bottom: .3rem;
    }

    .content_right_item img {
        width: 5.96rem;
        height: 3.36rem;
        border-radius: .12rem;
    }

    .content_right_item_tit {
        font-size: .4rem;
        height: 1.05rem;
        line-height: 1.05rem;
    }

    .content_right_item_txt {
        width: 5.97rem;
        height: 1.38rem;
        border-radius: .12rem;
        padding: .2rem .4rem;
        font-size: .3rem;
    }

    .content_left_nav_item_title {
        font-size: .32rem;
        font-weight: 600;
    }

}





.kjkz_content {
    display: flex;
    justify-content: space-between;
}


.kjkz_items {
    display: flex;
    flex-wrap: wrap;
    width: 894px;
    justify-content: space-between;
    align-content: space-between;
    box-sizing: border-box;
    padding-bottom: 19px;
}

.kjkz_item {
    width: 280px;
    height: 240px;
    box-shadow: 3px 5px 20px 0px rgba(223, 223, 223, 0.45);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    position: relative;
    box-sizing: border-box;
    padding-top: 63px;
    padding-left: 18px;
}

.kjkz_item:nth-child(1) {
    background-image: url(../imgs/kz01.png);
}

.kjkz_item:nth-child(2) {
    background-image: url(../imgs/kz02.png);
}

.kjkz_item:nth-child(3) {
    background-image: url(../imgs/kz03.png);
}

.kjkz_item:nth-child(4) {
    background-image: url(../imgs/kz04.png);
}

.kjkz_item:nth-child(5) {
    background-image: url(../imgs/kz05.png);
}

.kjkz_item:nth-child(6) {
    background-image: url(../imgs/kz04.png);
}

.kjkz_item_text_title div:nth-child(1) {
    font-size: 34px;
    font-weight: 400;
    line-height: 0;
    margin-bottom: 15px;
}

.kjkz_item_text_title div:nth-child(2) {
    font-size: 34px;
    font-weight: bold;
}

.kjkz_item_text_msg {
    width: 145px;
    height: 40px;
    background: #FAFAFA;
    border-radius: 20px;
    text-align: center;
    line-height: 40px;
    font-weight: 400;
    font-size: 14px;
    color: #666666;
    margin-top: 26px;
}

.kjkz_item_tag {
    font-size: 12px;
    line-height: 20px;
    text-align: center;
    color: #fff;
    font-weight: 400;
    width: 40px;
    height: 20px;
    background: #FF6F02;
    border-radius: 0px 10px 10px 0px;
    position: absolute;
    left: 0;
    top: 20px;
}

.kjkz_item_btn {
    width: 150px;
    height: 38px;
    background: #FF6F02;
    border-radius: 19px;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translate(-50%, 50%);
    color: #FFFFFF;
    text-align: center;
    line-height: 38px;
}

.kjkz_item {
    margin-bottom: 50px;
}

@media screen and (max-width:750px) {
    .kjkz_items {
        display: block;
        width: 100%;
    }

    .kjkz_item {
        width: 7.03rem;
        height: 6.03rem;
        margin-bottom: .97rem;
        padding-top: 1.5rem;
        padding-left: .48rem;
    }

    .kjkz_item_btn {
        width: 3.77rem;
        height: .95rem;
        border-radius: .48rem;
        font-size: .4rem;
        font-weight: 500;
        line-height: .95rem;
    }

    .kjkz_item_tag {
        width: 1.26rem;
        height: .5rem;
        /* background: #FF6F02; */
        border-radius: 0px .25rem .25rem 0px;
        top: .5rem;
        font-size: .3rem;
        line-height: .5rem;
    }

    .kjkz_item_text_title div:nth-child(1) {
        line-height: .85rem;
        font-size: .85rem;
        font-weight: 400;
        color: #333333;
        margin-bottom: .25rem;
    }

    .kjkz_item_text_title div:nth-child(2) {
        font-size: .85rem;
        font-family: PingFang;
        font-weight: bold;
        color: #333333;
    }

    .kjkz_item_text_msg {
        width: 3.64rem;
        height: 1rem;
        line-height: 1rem;
        border-radius: .2rem;
        font-size: .35rem;
    }
}