html,
body {
    min-width: 1200px;
    width: 100vw;
    font-size: 16px;
    background: #f3f6fb;
    overflow-x: hidden;
    font-family: 微软雅黑;
}

@media screen and (max-width:1400px) {

    html,
    body {
        font-size: 12px;
    }

    .max_width {
        width: 1200px !important;
    }
}

.max_width {
    width: 1400px;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
    out-line: none;
}

a,
body,
div,
dl,
dt,
em,
form,
h1,
h2,
h3,
h4,
h5,
h6,
html,
img,
li,
p,
q,
span,
table,
tbody,
td,
tfoot,
th,
thead,
tr,
ul {
    border: 0;
    margin: 0;
    padding: 0
}

.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

hr {
    border-top: 1px solid rgba(222, 228, 239, 1);
}

/*返回顶部*/
.return_top {
    display: none;
    position: fixed;
    bottom: 100px;
    right: 10px;
    width: 50px;
    height: 50px;
}

.return_top>a {
    display: block;
    font-size: 0.8rem;
    line-height: 50px;

    color: #999999;
    width: 100%;
    height: 100%;
    background-color: #ddd;
    text-align: center;
    border-radius: 4px;
    -webkit-border-radius: 4px;
}

.return_top_img2 {
    display: none;
}

.return_top>a:hover .return_top_img1 {
    display: none;
}

.return_top>a:hover .return_top_img2 {
    display: inline-block;
}

.return_top>a img {
    max-width: 100%;
}

/*灰色按钮*/
.operating_gray {
    border: 1px solid rgba(220, 220, 220, 1);
    color: rgba(153, 153, 153, 1);

}

.operating_gray:hover,
.cancel:hover {
    color: rgba(102, 102, 102, 1) !important;
    border: 1px solid rgba(153, 153, 153, 1) !important;
}

/*蓝色按钮*/
.operating_blue {
    background: rgba(56, 140, 255, 1);
    border: 1px solid rgba(56, 140, 255, 1);
    color: rgba(255, 255, 255, 1) !important;

}

.operating_blue:hover,
.determine:hover {
    background: rgba(0, 87, 255, 1) !important;
    color: rgba(255, 255, 255, 1) !important;
}

/*头部*/
.head {

    margin: 0 auto;

}

.head_top {
    font-size: 14px;
    line-height: 14px;
    font-weight: 400;
    color: rgba(48, 48, 48, 1);
    padding: 23px 0;
    margin: 0;
}

.head_centent {
    min-width: 1200px;
    background: rgba(255, 255, 255, 1);
    border-radius: 0px 4px 4px 0px;
    margin-bottom: 20px;
    overflow: hidden;
}

.head_left {
    width: 45%;
    float: left;
    position: relative;
}

.head_right {
    position: relative;
    width: 54.3%;
    float: left;
    padding: 2.5rem 2.5rem 0;
}

.head_left_play {
    cursor: pointer;
    width: 100%;
    height: 100%;
    position: absolute;
    background-color: rgba(0, 0, 0, 0.3);
}

.head_left_play>i {
    box-sizing: border-box;
    width: 80px;
    height: 80px;
    position: absolute;
    top: 50%;
    left: 50%;
    font-size: 30px;
    transform: translate(-50%, -50%);
    color: #ffffff;
    border: 5px solid #ffffff;
    border-radius: 50%;
    padding: 20px;
}

.fa-play:before {
    margin-left: 7px;
}

.head_left img {
    max-width: 100%;
}

.head_right>div>* {
    display: inline-block;
}

.head_right_title {
    display: flex;
    display: -ms-flexbox;

    -ms-flex-pack: end;
    justify-content: flex-start;
}

.head_right_title h3 {
    font-size: 24px;
    line-height: 2rem;
    margin-top: -0.4rem;
    font-weight: 400;
    color: rgba(48, 48, 48, 1);
    width: 56%;
}

.head_right_title div {
    position: absolute;
    right: 18px;
}

.head_right_title div p {
    display: flex;
    display: -ms-flexbox;
    align-content: center;
    height: 1.25rem;
    line-height: 1.25rem;
    font-size: 14px;
    font-weight: 400;
    color: rgba(153, 153, 153, 1);
}

.head_right_title div p:first-child {
    margin-right: 1.5rem;
}

.head_right_title div p {
    float: left;
    margin-right: 13px;
    margin-bottom: 0.5rem;
}

.head_right_title div p span {
    padding-left: 7px;
}

.head_right_title div p img {
    cursor: pointer;
    max-width: 100%;
    max-height: 100%;
}





/*.head_right_title_icon>p:hover .head_right_icon1{
    display: none;
}
.head_right_title_icon>p:hover .head_right_icon2{
    display: inline-block;
}*/
.head_right_icon2 {
    display: none;
}

.head_right_tow {
    margin: 1.56rem 0;
    font-size: 14px;
    line-height: 15px;
    font-weight: 400;
    color: rgba(153, 153, 153, 1);
}

.head_right_tow span {
    margin-right: 1.5rem;
}

.head_right_three {
    font-size: 1.25rem;
    line-height: 1rem;
    font-weight: 400;
    color: rgba(153, 153, 153, 1);
}

.head_right_three>span {
    font-size: 0.87rem;
    width: 2.7rem;
}

.head_right_three>div {
    position: relative;
}

/*.head_right_three>div::after{
    content: '';
    position: absolute;
    left: 0;
    top: 45%;
    transform: translateY(-50%);
    width: 110%;
    height: 1px;
    background: rgba(153,153,153,1);
}*/
.head_right_three>div>e {
    font-size: 12px;
}

.head_right_three>div>span {
    font-size: 1.25rem;
    margin-left: -0.5rem;
}

.head_right_four {
    font-size: 1.25rem;
    color: #F05334;
    line-height: 20px;
    margin: 1.375rem 3rem 4.3rem;

    position: relative;
}

.head_right_four>e {
    font-size: 12px;
}

.head_right_four>span {
    margin-left: 0.1rem;
}

.head_right_four p {
    border: 1px solid #F05334;
    border-radius: 5px;
    font-size: 12px;

    position: absolute;


    margin-left: 13px;
    padding: 0 1rem;
}

.head_right_five {
    font-size: 1.1rem;
}

.head_right_five a {
    line-height: 1.1rem;
    color: rgba(153, 153, 153, 1);
    padding: 11px 45px;
    border: 1px solid rgba(229, 229, 229, 1);
    border-radius: 5px;
    margin-right: 22px;
}

.head_right_five a:first-child {

    color: rgba(243, 246, 251, 1);
    border: 1px solid rgba(243, 246, 251, 1);
}


/*课程内容*/
.course {

    margin: 0 auto 60px;
    /*overflow: hidden;*/

}

.course::after {
    content: '';
    display: table;
    clear: both;
}

.course_left {
    width: 75%;
    height: 100%;
    background: rgba(255, 255, 255, 1);
    border-radius: 4px;

    float: left;
    padding: 0px 25px 2rem;
}

.course_select {
    font-size: 1.1rem;
    font-weight: 400;
    color: rgba(48, 48, 48, 1);
    position: relative;
    overflow: hidden;
}

.course_select::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: rgba(238, 238, 238, 1);
}

.course_select>li {
    float: left;
    width: 6.25rem;
    text-align: center;
    margin-right: 0.9rem;
}

.course_select>li a {
    display: block;
    font-size: 1.125rem;
    padding: 30px 0.875rem 15px;
    width: 100%;
    height: 100%;
    color: #303030;
}

.bottomLine {
    position: absolute;
    bottom: 0px;
    background: #388CFF;
    width: 0%;
    height: 4px;
    display: none;
    transition: all 0.2s ease;
}

.course_select_active a,
.course_select>li:hover a {
    color: #388CFF !important;
}

.course_box {
    margin-top: 30px;
}

.course_introduce {
    padding: 0 1rem;
}

.course_introduce img {
    width: 100%;
}

.course_introduce_div {
    margin-top: 60px;
    font-size: 14px;
    font-weight: 400;
    color: rgba(40, 40, 40, 1);
}

.course_introduce_list {
    padding: 0 30px;
}

.course_introduce_list>li {
    padding: 3.125rem 0 1.56rem;
    margin: 0 20px;
    border-bottom: 1px solid rgba(235, 237, 240, 1);
}

.introduce_li_head {

    margin: 0 !important;
    position: relative;
    padding: 2.25rem 1.25rem !important;
}

.introduce_li_head>h3 {
    position: relative;
    font-size: 1.5rem;
    line-height: 1.5rem;
    font-weight: 500;
    color: #404040;
    text-indent: 10px;
    z-index: 5;
    border-left: 4px solid rgba(0, 87, 255, 1);
}

.introduce_li_head>h2 {
    position: absolute;
    left: 2rem;
    bottom: 1rem;
    font-size: 3.75rem;
    line-height: 3.75rem;
    z-index: 1;
    font-family: Arial-BoldMT;
    font-weight: bold;
    color: rgba(247, 248, 250, 1);
}

.course_introduce_list>li>p:first-child {
    color: #4D4D4D;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.course_introduce_list>li>p:last-child {
    color: #666666;
    font-size: 1rem;
    border-bottom: 0.5rem;
}


.course_right {
    width: 25%;
    float: right;
    padding-left: 20px;
}

.course_right>div {
    background: rgba(255, 255, 255, 1);
    border-radius: 4px;
}

.teacher {
    padding: 20px;
}

.teacher>h3 {
    font-size: 18px;
    font-weight: 400;
    color: rgba(48, 48, 48, 1);
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(238, 238, 238, 1);
}

.teacher_liu {
    background: rgba(255, 255, 255, 1);
    border: 1px solid rgba(238, 238, 238, 1);
    border-radius: 4px;

    padding: 20px;
    display: flex;
    display: -ms-flexbox;

    flex-wrap: wrap;

}

.teacher_liu:hover {
    box-shadow: 0 5px 10px -5px rgba(238, 238, 238, 1);
}

.teacher_liu>div:first-child {
    width: 28%;
    margin-right: 5%;
    float: left;
}

.teacher_liu>div:first-child img {
    width: 100%;
}

.teacher_liu_right {
    width: 62%;
    float: left;
    margin-left: 0.6rem;
}

.teacher_liu_right p {

    font-size: 0.88rem !important;
    font-weight: 400;
    margin-bottom: 0.5rem;
    color: rgba(153, 153, 153, 1);
}

.teacher_liu_right p:first-child {
    font-size: 1.1rem;
    font-weight: 400;
    color: rgba(48, 48, 48, 1);
}


/*课程老师 关注、私信按钮*/
.teacher_liu>p {
    overflow: hidden;
    height: 0;
    width: 100%;
    padding-right: 10px;
    margin-top: 0px;
    text-align: right;
    transition: all 0.2s;
}

.teacher_liu>p span {
    cursor: pointer;
    display: inline-block;

    padding: 0.4rem 1rem;
    background: rgba(255, 255, 255, 1);
    border: 1px solid rgba(238, 238, 238, 1);
    border-radius: 4px;

    font-size: 14px;
    font-weight: 400;

    color: rgba(153, 153, 153, 1);
}

.teacher_liu_active {
    color: rgba(255, 255, 255, 1) !important;
    background: rgba(56, 140, 255, 1) !important;
}

/*移入 授课老师*/
.teacher_liu:hover {
    box-shadow: 0 5px 10px -5px rgba(238, 238, 238, 1);
}

.teacher_liu:hover>p {
    margin-top: 10px;
    height: 35px;
}

.teacher>p {
    border-top: 1px solid rgba(238, 238, 238, 1);
    padding: 15px 5px 10px;
    margin-top: 15px;
    font-size: 0.87rem;
    font-weight: 400;
    color: rgba(153, 153, 153, 1);
}

/*学员*/
.Student,
.Popular {
    padding: 20px;
    margin-top: 20px;
}

.Student>h3,
.Popular>h3 {
    font-size: 1.1rem;
    font-weight: 400;
    color: rgba(48, 48, 48, 1);
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(238, 238, 238, 1);
}

.Student>h3 a,
.Popular>h3 a {
    float: right;
    font-size: 12px;
    font-weight: 400;
    color: rgba(0, 87, 255, 1);
}

.Student>ul {
    margin: 25px 15px 10px;
}

.Student>ul>li {
    -moz-box-orient: vertical;
    -ms-box-orient: vertical;
    box-orient: vertical;
    -webkit-box-orient: vertical;

    display: -webkit-box;

    -moz-line-clamp: 1;
    -ms-line-clamp: 1;
    line-clamp: 1;
    -webkit-line-clamp: 1;
    overflow: hidden;
    /*white-space: nowrap;!*IE*!*/
    -o-text-overflow: ellipsis;
    /* for Opera */
    text-overflow: ellipsis;
    /* for IE */

    margin-bottom: 1rem;
}

.Student>ul>li span,
.Student>ul>li a {
    color: rgba(153, 153, 153, 1)
}

.Student>ul>li a:hover {
    color: rgba(0, 87, 255, 1);
}


/*热门推荐*/
.Popular {
    overflow: hidden;
    padding: 25px 20px;
}

.Popular>ul li {
    overflow: hidden;
    padding: 20px 0;
    border-bottom: 1px solid rgba(238, 238, 238, 1);
}

.Popular>ul li:hover .Popular_div h3 {
    color: rgba(0, 87, 255, 1);
}

.Popular_img,
.Popular_div {
    float: left;
    width: 50%;
}

.Popular_img>img {
    width: 100%;
}

.Popular_div {
    padding: 8px 1rem;
}

.Popular_div h3 {
    font-size: 0.87rem;
    margin-bottom: 8px;
    font-weight: 400;
    color: rgba(48, 48, 48, 1);
    line-height: 20px;

    -moz-box-orient: vertical;
    -ms-box-orient: vertical;
    box-orient: vertical;
    -webkit-box-orient: vertical;

    display: -webkit-box;
    display: -ms-flex;

    -moz-line-clamp: 2;
    -ms-line-clamp: 2;
    line-clamp: 2;
    -webkit-line-clamp: 2;
    overflow: hidden;
    /* white-space: nowrap;
    -o-text-overflow: ellipsis; !* for Opera *!
    -ms-text-overflow: ellipsis; !* for IE *!*/
}

.Popular_div p {
    font-size: 12px;
    font-weight: 400;
    color: rgba(153, 153, 153, 1);
}

.Popular_div p:first-child {
    margin-bottom: 9px;
}

/*底部*/
.footer {
    width: 100%;
    overflow: hidden;
}

.ddl {
    width: 55%;
    margin: 0;
}

.ddl>p {
    margin-top: 35px;
}

.ddl>ul {
    display: flex;
    display: -ms-flexbox;
    justify-content: flex-start;

}

.ddl>ul>li>ul>li:first-child a {
    color: #888888;
    display: block;
    font-size: 14px;
    margin: 15px 0;
}

.ddl>ul>li>ul>li a {
    font-size: 14px;
    line-height: 22px;
}

.ddl>ul>li>ul {
    margin-left: 50px;
}

.ddl>ul>li:first-child>ul {
    margin: 0;
    padding: 0;
}

.ddl>ul>li a {
    color: #666666;
}

.ddl>ul>li a:hover {
    color: #888888 !important;
}

.ddl>p>span {
    font-size: 12px;
    font-weight: 300;
    color: #666666;
    line-height: 24px;
    margin: 0 10px;
}

.ddl>p>span:first-child {
    margin: 0;
}

.ddr_box {
    display: flex;
    display: -ms-flexbox;

    -ms-flex-pack: center;
    justify-content: center;
    width: 100%;
}

.ddr_box>div {
    margin: 10px 7px;
    position: relative;
}

.ff {
    width: 100%;
}

.ff>img {
    width: 100%;
}

.Img {
    display: none;
}

.wx:hover .qr,
.wb:hover .qr,
.qq:hover .qr {
    -ms-transform: translateX(-35%);
    transform: translateX(-35%);
    display: block;
    /*display: -ms-flexbox;*/
}

.wx:hover .Img,
.wb:hover .Img,
.qq:hover .Img {
    display: block;
}

.wx:hover .Img_bai,
.wb:hover .Img_bai,
.qq:hover .Img_bai {
    -ms-transform: translateX(-35%);
    transform: translateX(-35%);
    display: none;
}

.qr {
    display: none;
    text-align: center;
    position: absolute;

    -ms-flex-wrap: wrap;
    flex-wrap: wrap;

    -ms-flex-align: center;
    align-content: center;

    -ms-flex-pack: justify;
    justify-content: center;
    padding-top: 25px;
    bottom: -140px;
    width: 110px;
    /*height: 127px;*/
    background: url("../../../static/common/images/QR-code-bg.png") no-repeat center center;
}

.qr img {
    display: inline-block;
    width: 80%;
    margin: 0 auto;
}

.qr p {
    display: block;
    text-align: center;
    font-size: 12px;
    color: #999999;
}

.footer_hr {
    width: 100%;
    border-top: 1px solid #666666;
}

.footer_bot {
    padding-bottom: 30px;
}

/*翻页*/
.Page {
    text-align: center;
}

.pagination {
    margin: 60px auto 40px;
}

.pagination>li>a {
    font-size: 14px;
    font-weight: 400;
    color: rgba(153, 153, 153, 1);
    border: 1px solid rgba(238, 238, 238, 1);
    border-radius: 5px;
    line-height: 40px;
    padding: 0;
    width: 40px;
    height: 40px;
    margin: 0 5px;
}

.pagination>li:first-child>a {
    margin-right: 10px;
}

.pagination>li:last-child>a {
    margin-left: 10px;
}

.pagination>li>a:hover,
.pagination>li>a:focus {
    background: rgba(56, 140, 255, 1);
    border: 1px solid rgba(56, 140, 255, 1);
    color: rgba(255, 255, 255, 1);
}

/*
@media screen and  (max-width: 1600px){
    html,body{
        font-size: 14px;
    }
    .head_right_four{
        margin: 1.375rem 3rem 1.3rem;
    }

    .Popular_div{
        padding: 0 1rem;
    }
    .Popular_div h3{
        line-height: 1rem;
    }

    .label_list>div a span{
        font-size: 14px;
        padding:12px 25px ;
    }
}
@media screen and  (max-width: 1475px){
    html,body{
        font-size: 12px;
    }
   !* .Popular_img, .Popular_div{
        float: unset;
        width: 100%;
    }*!
    .Popular_div{
        padding:  1rem;
    }
    .Popular_div h3{
        line-height: 1.5rem;
    }
}*/