.course_wrap {
    padding-bottom: 5vh;
}

.course_list {
    position: relative;
    width: 100%;
    padding-left: 20px;
    margin-bottom: 50px;
}

.course_list.course_1 .pic,
.course_list.course_1 .overlay_title {
    background: #0069a6;
}

.course_list.course_1 .list a:hover {
    color: #0069a6;
}

.course_list.course_1 .list .btn_wrap a:hover {
    background: #0069a6;
    color: #fff;
    border-color: #0069a6;
}

.course_list.course_1 .list .btn_wrap a:hover .icon {
    background-image: url("../images/icon_arrow_w.png");
}

.course_list.course_1 .head:before {
    border-color: transparent #001d3f transparent transparent;
    margin-top: -8px;
}

.course_list.course_1 .head:after {
    border-color: #012561 transparent transparent transparent;
}

.course_list.course_1 .head h3 {
    background: #012561;
}

.course_list.course_2 .pic,
.course_list.course_2 .overlay_title {
    background: #605dbd;
}

.course_list.course_2 .list a:hover {
    color: #605dbd;
}

.course_list.course_2 .list .btn_wrap a:hover {
    background: #605dbd;
    color: #fff;
    border-color: #605dbd;
}

.course_list.course_2 .list .btn_wrap a:hover .icon {
    background-image: url("../images/icon_arrow_w.png");
}

.course_list.course_2 .head:before {
    border-color: transparent #0a0042 transparent transparent;
    margin-top: -8px;
}

.course_list.course_2 .head:after {
    border-color: #201465 transparent transparent transparent;
}

.course_list.course_2 .head h3 {
    background: #201465;
}

.course_list.course_3 .pic,
.course_list.course_3 .overlay_title {
    background: #008ba0;
}

.course_list.course_3 .list a:hover {
    color: #008ba0;
}

.course_list.course_3 .list .btn_wrap a:hover {
    background: #008ba0;
    color: #fff;
    border-color: #008ba0;
}

.course_list.course_3 .list .btn_wrap a:hover .icon {
    background-image: url("../images/icon_arrow_w.png");
}

.course_list.course_3 .head:before {
    border-color: transparent #001d2a transparent transparent;
    margin-top: -8px;
}

.course_list.course_3 .head:after {
    border-color: #003147 transparent transparent transparent;
}

.course_list.course_3 .head h3 {
    background: #003147;
}

.course_list.course_4 .pic,
.course_list.course_4 .overlay_title {
    background: #007e74;
}

.course_list.course_4 .list a:hover {
    color: #007e74;
}

.course_list.course_4 .list .btn_wrap a:hover {
    background: #007e74;
    color: #fff;
    border-color: #007e74;
}

.course_list.course_4 .list .btn_wrap a:hover .icon {
    background-image: url("../images/icon_arrow_w.png");
}

.course_list.course_4 .head:before {
    border-color: transparent #002120 transparent transparent;
    margin-top: -8px;
}

.course_list.course_4 .head:after {
    border-color: #00302f transparent transparent transparent;
}

.course_list.course_4 .head h3 {
    background: #00302f;
}

.course_list .head {
    position: absolute;
    left: 0;
    top: -10px;
    z-index: 1;
    color: #fff;
}

.course_list .head:before,
.course_list .head:after {
    content: "";
    display: block;
    position: absolute;
    width: 0;
    height: 0;
    border-style: solid;
}

.course_list .head:before {
    left: 0;
    top: 100%;
    border-width: 0 20px 20px 0;
}

.course_list .head::after {
    left: 100%;
    top: 0;
    border-width: 50px 20px 0 0;
}

.course_list .head h3 {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 50px;
    padding: 0 15px;
    font-weight: 500;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.2);
}

.course_list .box {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    position: relative;
    z-index: 0;
    border-radius: 10px;
    overflow: hidden;
}

.course_list .box .pic {
    width: 30%;
}

.course_list .box .pic .contain_bg {
    width: 100%;
    padding-bottom: 89.5%;
    background-position: center bottom;
}

.course_list .box .list {
    position: relative;
    width: 70%;
    padding: 15px 25px;
    background: rgba(255, 255, 255, 0.8);
}

.course_list .box .list .h_wrap {
    position: relative;
    overflow: hidden;
    width: 100%;
    transition: 1s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.course_list .box .list .h_wrap .item_wrap {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
}

.course_list .box .list .item {
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 10px;
    border-bottom: 1px solid #999;
}

.course_list .box .list .item span {
    display: inline-block;
    width: 135px;
    margin-right: 20px;
    padding: 0 10px;
    background: #96abb4;
    color: #fff;
    text-align: center;
}

.course_list .box .list .item p {
    width: calc(100% - 155px);
    line-height: 1.5em;
    padding-top: 2px;
}

.course_list .box .list .item p a {
    cursor: pointer;
}

.course_list .box .list .btn_wrap {
    display: flex;
    justify-content: center;
    width: 100%;
    padding-top: 20px;
    padding-bottom: 10px;
}

.course_list .box .list .btn_wrap a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-radius: 30px;
    border: 1px solid #ccc;
    background: #fff;
    font-size: 16px;
    padding: 0 15px;
    cursor: pointer;
}

.course_list .box .list .btn_wrap a.active .icon {
    transform: rotate(180deg);
}

.course_list .box .list .btn_wrap a span {
    margin-right: 5px;
}

.course_list .box .list .btn_wrap a .icon {
    width: 13px;
    height: 8px;
    background: url("../images/icon_arrow.png") no-repeat center center;
    background-size: contain;
}

.course_overlay {
    position: relative;
    width: 90%;
    max-width: 800px;
}

.course_overlay .overlay_pic {
    position: absolute;
    right: 80px;
    top: 0;
    transform: translateY(-20%);
    z-index: 1;
    width: 25%;
}

.course_overlay .overlay_pic img {
    width: 100%;
}

.course_overlay .head h3 {
    font-size: 26px;
}

.course_overlay .box {
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 0;
    background: #fff;
    border-radius: 15px;
}

.course_overlay .overlay_title {
    position: relative;
    width: 100%;
    padding: 40px;
    padding-top: 60px;
    color: #fff;
}

.course_overlay .overlay_title h4 {
    max-width: 70%;
    font-weight: 500;
    font-size: 22px;
    text-align: left;
}

.course_overlay .info {
    padding: 30px 60px;
    background: #fff;
}

.course_overlay .info .item {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    line-height: 1.5em;
    margin-bottom: 15px;
}

.course_overlay .info .item:last-child {
    margin-bottom: 0;
}

.course_overlay .info .item span {
    width: 100px;
}

.course_overlay .info .item>div {
    width: calc(100% - 120px);
}

.course_overlay .info .btn_wrap {
    display: flex;
    justify-content: center;
    padding-top: 25px;
}

.course_overlay .info .btn_wrap a {
    display: inline-block;
    padding: 3px 25px 4px 25px;
    border-radius: 30px;
    background: #ff8740;
    color: #fff;
}

.course_overlay .info .btn_wrap a:hover {
    background: #0069a6;
}

.main-info {
    padding: 1.875em;
    background-color: #fff;
    border: 0.0625em solid #eaeaea;
    margin-bottom: 0.625em;
}

@media screen and (max-width: 30em) {
    .course_list .box .pic{
        display: none;
    }
    .course_list .box .list{
        width: 100%;
    }

    .course_list .box .list .item span{
        display: none;
    }

    .course_list .box .list .item p{
        width: 100%;
    }
    .course_list .box .list .item:first-child{
        padding-top: 4em;
    }
}