/* 头部导航 */
body {
    padding-top: 60px;
}

header {
    background-color: #fff;
    width: 100%;
    transition: all .4s;
    z-index: 12 !important;
    box-shadow: 0 0 25px rgb(0 0 0 / 10%) !important;
}

.head-fix {
    position: fixed !important;
    left: 0 !important;
    top: 0 !important;
}

.head-con {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.nav-back-index img {
}

.nav-back-index {
    font-size: 0;
    height: fit-content;
    min-width: auto!important;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex: 1;
}

.head-nav-list {
    display: flex;
    flex: 1;
    justify-content: center;
    flex-shrink: 0;
}

.head-nav-list .head-nav-li {
    flex: 1;
    max-width: 128px;
    height: 60px;
    white-space: nowrap;
    /* position: relative; */
}

.head-nav-list .head-nav-li .nav-link {
    display: block;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 60px;
    font-size: 16px;
    font-family: 'OPPOSansBold';
    color: rgba(51, 51, 51, 1);
}

.head-nav-list .head-nav-li.default-choose .nav-link {
    color: #2250C4;
}

.head-nav-list .head-nav-li.choose-style .nav-link {
    background: #2250C4;
    color: #fff;
}

.head-nav-list .head-nav-li.choose-style .nav-select-list {
    display: flex;
}

.head-nav-list .head-nav-li:last-child:hover .nav-link {
    color: #2250C4;
}

.head-nav-list .head-nav-li:first-child:hover .nav-link {
    color: #2250C4;
}

.head-nav-list .head-nav-li:nth-child(2) .nav-select-list .nav-select-list-item:nth-child(5) .tag-cloud-link {
    padding-top: 20px;
}

.head-depart-nav-select {
    position: fixed;
    width: 100%;
    top: 60px;
    left: 0;
    z-index: 11;
}

.nav-select-list {
    display: none;
    padding: 20px;
    position: absolute;
    left: 0;
    top: 60px;
    /* margin: 0 auto; */
    width: 1190px;
    height: 196px;
    background: #ffffff;
    justify-content: space-between;
    align-items: center;
    border-radius: 0px 0px 5px 5px;
    box-shadow: 0px 16px 32px 0px rgba(166, 166, 166, 0.25);
    z-index: 9;
}

.nav-select-list-item {
    width: 180px;
    height: 156px;
    background: #f7fafc;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.tag-cloud-link {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.nav-select-list-item .nav-how-learn-details {
    width: 180px;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}


.nav-select-list-item .nav-how-learn-details:hover {
    background: #2250C4;
}

.nav-select-list-item .nav-how-learn-details:hover .nav-learn-what-title {
    color: #fff;
}

.nav-select-list-item .nav-how-learn-details:hover .nav-learn-what-desc {
    color: rgba(255, 255, 255, .8);
}

.nav-select-list-item:nth-child(1) .nav-how-learn-details:hover .nav-learn-what-icon img {
    content: url(/web3/img/howLearn/Icon_Course_Center_1.svg);
}

.nav-select-list-item:nth-child(2) .nav-how-learn-details:hover .nav-learn-what-icon img {
    content: url(/web3/img/howLearn/Icon_International_Think-Tank_1.svg);
}

.nav-select-list-item:nth-child(3) .nav-how-learn-details:hover .nav-learn-what-icon img {
    content: url(/web3/img/howLearn/Icon_Revising_Market_1.svg);
}

.nav-select-list-item:nth-child(4) .nav-how-learn-details:hover .nav-learn-what-icon img {
    content: url(/web3/img/howLearn/Icon_Happy_Job_1.svg);
}

.nav-select-list-item:nth-child(5) .nav-how-learn-details:hover .nav-learn-what-icon img {
    content: url(/web3/img/howLearn/Icon_Academic_Community_1.svg);
}

.nav-select-list-item:nth-child(5) .nav-how-learn-details:hover,
.nav-select-list-item:nth-child(6) .nav-how-learn-details:hover {
    background: #032361;
}

.nav-select-list-item:nth-child(6) .nav-how-learn-details:hover .nav-learn-what-icon img {
    content: url(/web3/img/howLearn/Icon_Thesis_Guidance_1.svg);
}

/* .nav-select-list-item .nav-how-learn-details .nav-learn-what-icon img {
    height: 66px;
    margin-left: 14px;
    margin-bottom: -12px;
} */

.nav-learn-what-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.nav-learn-what-icon img {
    height: 40px;
}

.nav-learn-what-title {
    font-size: 16px;
    color: #333333;
    line-height: 24px;
    margin-top: 12px;
}

.nav-learn-what-desc {
    font-size: 12px;
    color: #8a8a8a;
    line-height: 20px;
}

.nav-select-list-item:hover .nav-select-list-major-list {
    left: 0;
}

.nav-select-list-major-list {
    position: absolute;
    width: 100%;
    height: 100%;
    background: #2250C4;
    left: -180px;
    transition: all .4s;
    top: 0;
    /* padding: 15px; */
    z-index: 8;
}

.nav-select-list-major-list-con {
    width: 100%;
    height: 100%;
}

.nav-select-list-major-list-item {
    margin-bottom: 8px;
    width: 50%;
}

.nav-select-list-major-list-item:last-child {
    margin-bottom: 0;
}

.nav-learn-what-link {
    display: block;
    width: 100%;
}

.nav-learn-what-link img {
    width: 100%;
    height: 100%
}

.nav-learn-what-major {
    width: 100%;
    font-size: 16px;
    color: #ffffff;
    line-height: 20px;
}


/* .nav-learn-what-link img{
    width: 13px;
    transform: rotateZ(90deg);
} */


/* .nav-select-list-item a{
    display: block;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 48px;
    font-size: 14px;
    color: #101010;
}
.nav-select-list-item:hover a{
    background-color: #2250C4;
    color: #fff;
} */

.head-nav-right {
    display: flex;
    align-items: center;
    height: 60px;
}

.head-search-box {
    display: flex;
    align-items: center;
    margin-right: 20px;
    position: relative;
    cursor: pointer;
    height: 100%;
}

.head-search-box .head-search-copy {
    display: block;
    width: 78px;
    height: 36px;
    border: 1px solid #b0b0b0;
    border-radius: 8px;
    padding-left: 12px;
    align-items: center;
    line-height: 34px;
    font-size: 14px;
    font-family: 'OPPOSansBold';
    color: #8a8a8a;
}

.head-search-box.open-search .head-search-copy {
    border: 1px solid #2250C4;
    line-height: 34px;
    color: #2250C4;
}

.head-search-box.open-search .search-icon img {
    content: url('/web3/img/search_color.png');
}

.search-icon {
    cursor: pointer;
    position: absolute;
    width: 20px;
    height: 20px;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
}

.search-icon img {
    width: 100%;
    height: 100%;
}

.search-layer-box {
    position: fixed;
    width: 100%;
    height: calc(100% - 60px);
    left: 0;
    top: 60px;
    z-index: 10;
    background: rgba(0, 0, 0, 0.5);
    display: none;
}

.search-unfold-box {
    width: 1190px;
    height: 550px;
    background: #ffffff;
    padding: 30px 76px;
    position: relative;
}

.close-search-btn {
    position: absolute;
    right: 80px;
    top: 40px;
    cursor: pointer;
}

.close-search-btn img {
    width: 22px;
}

.close-search-btn:hover img {
    content: url(/web3/img/blue_close.svg);
}

.search-unfold-title {
    font-family: "OPPOSansBold";
    font-size: 28px;
    color: #333;
    line-height: 40px;
}

.search-unfold-keypress-box {
    margin-top: 20px;
}

.search-unfold-input-box {
    display: flex;
    align-items: center;
    width: 100%;
    height: 50px;
}

.search-unfold-input-box input {
    width: calc(100% - 120px);
    height: 100%;
    border: 1px solid #cccccc;
    border-radius: 8px 0px 0px 8px;
    padding: 15px 20px;
    font-size: 18px;
    color: #333333;
    line-height: 20px;

}

.search-unfold-input-box input::placeholder {
    font-size: 18px;
    color: #b0b0b0;
    line-height: 20px;
}

.search-btn-trigger {
    width: 120px;
    height: 50px;
    background: #2250C4;
    border-radius: 0px 8px 8px 0px;
    overflow: hidden;
}

.search-btn-trigger a {
    display: flex;
    width: 100%;
    height: 100%;
    justify-content: center;
    align-items: center;
    background: #2250C4;
}

.search-btn-trigger a img {
    width: 20px;
    height: 20px;
    margin-right: 16px;
}

.search-btn-trigger-text {
    font-size: 18px;
    color: #ffffff;
    line-height: 20px;
}

.search-popular-list {
    margin-top: 20px;
    display: flex;
    align-items: center;
}

.search-popular-list .search-popular-item {
    display: block;
    width: fit-content;
    height: 30px;
    background: #f1f1f1;
    border-radius: 5px;
    line-height: 30px;
    text-align: center;
    font-size: 16px;
    color: #888888;
    margin-right: 20px;
    padding: 0 10px;
}

.search-popular-list .search-popular-item:hover {
    background: #2250C4;
    color: #fff;
}

.search-popular-list .search-popular-item:last-child {
    margin-right: 0;
}

.search-recommend-box {
    margin-top: 30px;
}

.search-recommend-title {
    font-size: 22px;
    text-align: left;
    color: #333;
    line-height: 30px;
    margin-bottom: 20px;
    font-family: "OPPOSansBold";
}

.search-recommend-box .popular-recommend-item {
    margin-right: 26px;
    margin-bottom: 0;
    width: 240px;
    height: 250px;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    box-shadow: 0px 8px 24px 0px rgba(208, 217, 234, 0.24);
    transition: all .3s;
    position: relative;
    background: #fff;
}

.search-recommend-box .popular-recommend-item:hover {
    transform: translateY(-8px);
}

.search-recommend-box .popular-recommend-item:nth-child(4) {
    margin-right: 0;
}

.search-recommend-box .popular-item-top {
    width: 100%;
    height: 145px;
    border-radius: 8px 8px 0px 0px;
    position: relative;
}

.popular-item-top img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.search-recommend-box .popular-recommend-item.video .popular-item-top {
    position: relative;
}

.search-recommend-box .popular-recommend-item.video .popular-item-top .popular-item-teacher-img {
    position: absolute;
    width: unset;
    height: 100%;
    right: 0;
    bottom: 0;
    transform: translateY(20px);
}

.search-recommend-box .popular-recommend-item.video .popular-item-top {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 14px 16px;
}

.search-recommend-box .popular-recommend-item.video .popular-item-top .popular-item-video-title {
    width: 126px;
    font-size: 18px;
    font-family: 'OPPOSansBold';
    text-align: LEFT;
    color: #ffffff;
    line-height: 26px;
    white-space: unset;
    display: -webkit-box;
    text-overflow: ellipsis;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.search-recommend-box .popular-recommend-item.video .popular-item-top .popular-item-video-name-en {
    opacity: 0.8;
    font-size: 12px;
    text-align: LEFT;
    color: rgba(255, 255, 255, .8);
    line-height: 20px;
}

.search-recommend-box .popular-recommend-item.video .popular-item-top .popular-item-video-name-cn {
    font-size: 14px;
    text-align: LEFT;
    color: #ffffff;
    line-height: 24px;
}

.search-recommend-box .popular-recommend-item.video .video-details {
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.search-recommend-box .popular-recommend-item.video .video-number {
    margin-right: unset;
    font-size: 14px;
    font-family: 'OPPOSansBold';
    text-align: LEFT;
    color: #333333;
}

.search-recommend-box .popular-recommend-item.video .video-number a {
    font-size: 14px;
    font-family: 'OPPOSansBold';
    text-align: LEFT;
    color: #333333;
}

.search-recommend-box .popular-recommend-item.video .popular-recommend-school-info-box {
    margin-top: 10px;
    width: 100%;
}

.popular-recommend-belong-special {
    margin-top: 10px;
    display: flex;
    align-items: center;
}

.popular-recommend-belong-special-item {
    height: 24px;
    font-size: 12px;
    text-align: center;
    color: #e62412;
    line-height: 24px;
    padding: 0 10px;
    width: fit-content;
    border-radius: 2px;
    margin-right: 10px;
}

.popular-recommend-list {
    display: flex;
    flex-wrap: wrap;
}

.popular-recommend-belong-special-item:last-child {
    margin-right: unset;
}

.popular-recommend-item.work-shop .popular-item-top {
    padding: 12px 16px;
}

.popular-recommend-item.work-shop .work-shop-main-major {
    padding: 6px;
}

.popular-recommend-item.work-shop .work-shop-terms-tips {
    font-size: 14px;
    font-family: 'OPPOSansBold';
    text-align: LEFT;
    color: #ffffff;
    line-height: 14px;
}

.popular-recommend-item.work-shop .work-shop-terms-rainbow {
    height: 7px;
    background: linear-gradient(90deg, #6aebc6, #5b25f8 100%);
}

.popular-recommend-item.work-shop .work-shop-terms-style-bottom {
    height: unset;
    margin-top: 16px;
}

.popular-recommend-item.work-shop .work-shop-title {
    font-size: 22px;
    font-family: 'OPPOSansBold';
    line-height: 32px;
}

.search-recommend-box .layer-cover {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    background: rgba(0, 0, 0, .4);
    z-index: 1;
    border-radius: 5px 5px 0 0;
}

.popular-item-category-tag {
    width: 100%;
    height: 30px;
    text-align: center;
    line-height: 30px;
    font-size: 12px;
    color: #ffffff;
    position: absolute;
    font-family: "OPPOSansBold";
    left: 0;
    bottom: 0;
    z-index: 2;
    background-color: rgba(51, 51, 51, .28);
    backdrop-filter: blur(1.6px);
}

/* .popular-item-category-tag.doctor {
    background: linear-gradient(90deg, #f51920 57%, #fe7853 100%);
}

.popular-item-category-tag.master {
    background: linear-gradient(90deg, #1d19f5 56%, #53b6fe 100%);
} */

.search-recommend-box .popular-item-top img {
    border-radius: unset;
}

.search-recommend-box .popular-item-top {
    overflow: hidden;
}

.search-recommend-box .popular-item-bottom {
    position: absolute;

    bottom: 0;
    left: 0;
    border-radius: 0 0 8px 8px;
    transition: all .4s;
    z-index: 2;
    background-color: #fff;

    width: 100%;
    height: 105px;
    padding: 10px;

}

.search-recommend-box .popular-item-bottom .video-play-no span {
    margin-left: 6px;
    font-size: 14px;
    color: #8a8a8a;
}

.search-recommend-box .popular-item-bottom .video-play-no img {
    width: 18px;
    height: 20px;
}

.search-recommend-box .belong-school-logo {
    width: 60px;
    height: 60px;
    border-radius: 5px;
}

.search-recommend-box .belong-school-name {
    font-size: 14px;
    font-family: 'OPPOSansBold';
    color: #ffffff;
    line-height: 20px;
    margin-left: 10px;
    width: calc(100% - 70px);
}

.search-recommend-box .popular-recommend-title a {
    font-size: 12px;
    font-weight: 400;
    text-align: LEFT;
    color: #8a8a8a;
    line-height: 18px;
    white-space: unset;
    display: -webkit-box;
    text-overflow: ellipsis;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    height: 50px;
    width: 100%;
    overflow: hidden;
}

.search-recommend-box .popular-recommend-title.front a {
    -webkit-line-clamp: 1;
    height: auto;
    white-space: nowrap;
    font-size: 14px;
}

.search-recommend-box .popular-recommend-title:hover a {
    color: #2250C4;
}

.popular-recommend-school-info-box {
    display: flex;
    align-items: center;
    margin-top: 10px;
}

.popular-recommend-school-info-box img {
    height: 20px;
    /* width: 18px; */
}

.video-play-no {
    display: flex;
    align-items: center;
}

.popular-recommend-school-info-name a {
    font-size: 12px;
    text-align: LEFT;
    color: #8a8a8a;
    line-height: 20px;
    margin-left: 2px;
}

.search-recommend-box .popular-recommend-school-info-name {
    height: 20px;
    display: flex;
    align-items: center;
}

.popular-recommend-school-info-name a:hover {
    color: #2250C4;
}

.search-recommend-box .popular-recommend-item.video .video-number a:hover {
    color: #2250C4;
}

.search-recommend-box .master-category,
.search-recommend-box .doctor-category {
    width: 60px;
    height: 20px;
    border-radius: 10px 0px 0px 10px;
    line-height: 20px;
}

.search-recommend-box .popular-recommend-advantage {
    width: 100%;
    height: 26px;
    line-height: 26px;
}

.video-details {
    display: flex;
}

/* 登录注册按钮 */

.head-user-box {
    display: flex;
    align-items: center;
    position: relative;
    height: 100%;
}

.login-reminder {
    position: absolute;
    width: 170px;
    height: 34px;
    background: #383838;
    display: flex;
    align-items: center;
    justify-content: center;
    right: 0;
    top: 68px;
    border-radius: 8px;
    -webkit-animation: loopLogin 1s infinite;
    animation: loopLogin 1s infinite;
}

@keyframes loopLogin {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(10px);
    }

    100% {
        transform: translateY(0px);
    }
}

.login-reminder::before {
    content: '';
    display: block;
    position: absolute;
    left: 50%;
    top: -12px;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-bottom: 6px solid #383838;
}

.login-reminder a,
.login-reminder span {
    font-size: 14px;
    font-weight: 500;
    color: #fff;
    line-height: 24px;
}

.login-reminder a {
    font-family: 'OPPOSansBold';
    margin-right: 5px;
    color: rgba(70, 136, 255, 1);
}

.opreate-btn {
    width: 60px;
    height: 36px;
    text-align: center;
    line-height: 34px;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid #c7d9ff;
    font-size: 14px;
    color: #2250C4;
}

.opreate-btn.ontrue {
    background: #2250C4;
    color: #ffffff;
    border: none;
    line-height: 36px;
}

.login-box {
    margin-right: 12px;
}

.register-box {}

.login-notify {
    margin-right: 20px;
    cursor: pointer;
    position: relative;
    display: flex;
    align-items: center;
    height: 100%;
}

.login-notify:hover .notify-details-box {
    display: block;
}

.login-notify img {
    height: 20px;
}

.notify-details-box {
    position: absolute;
    width: 300px;
    height: 320px;
    background: #ffffff;
    border-radius: 0px 0px 10px 10px;
    top: 60px;
    right: -20px;
    z-index: 11;
    display: none;
}

.notify-details-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
}

.notify-details-list {
    height: calc(100% - 49px);
    overflow-y: scroll;
}

.notify-details-list::-webkit-scrollbar {
    width: 8px;
    border-radius: 6px;
    background: #e5e5e5;
}

.notify-details-list::-webkit-scrollbar-thumb {
    /*滚动条里面小方块*/
    border-radius: 10px;
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
    background: #d0d0d0
}

.notify-details-item {
    width: 100%;
    padding: 9px 16px 10px;
    border-top: 1px solid #d0d0d0;
}

.notify-details-item a {
    font-size: 14px;
    text-align: LEFT;
    color: #8a8a8a;
    line-height: 20px;
}

.notify-details-item.ready-play a {
    color: #333;
}

.notify-details-title {
    font-size: 16px;
    font-family: 'OPPOSansBold';
    color: #333;
}

.notify-details-clear {
    font-size: 14px;
    color: #8a8a8a;
}

.notify-details-clear:hover {
    color: #2250C4;
}

.login-status {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.login-status-name a {
    display: block;
    width: 36px;
    height: 36px;
    background: #2250C4;
    border-radius: 24px;
    text-align: center;
    line-height: 36px;
    cursor: pointer;
    font-size: 14px;
    color: #ffffff;
    border-radius: 50%;
    overflow: hidden;
}

.login-status-name a img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.login-status-name a.back-cansel {
    background: unset;
}

.login-notify-count {
    width: 20px;
    height: 20px;
    background: #ff4e4e;
    border-radius: 50%;
    font-size: 10px;
    font-family: 'OPPOSansBold';
    text-align: center;
    color: #ffffff;
    line-height: 20px;
    position: absolute;
    right: -6px;
    top: 10px;
}

.login-status:hover .user-info-login-list-con {
    display: block;
}

.user-info-login-list-con {
    display: none;
    width: 128px;
    position: absolute;
    top: 60px;
    right: 0;
    background: #ffffff;
    border-radius: 0px 0px 4px 4px;
    box-shadow: 0px 16px 32px 0px rgba(171, 179, 194, 0.24);
    z-index: 11;
}

.user-info-name-title {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 55px;
    border-bottom: 1px solid #d0d0d0;
}

.user-info-name {
    font-size: 14px;
    font-family: 'OPPOSansBold';
    color: #101010;
    line-height: 20px;
}

.user-info-tag-con {
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-info-tag {
    font-size: 12px;
    text-align: center;
    padding: 2px 4px;
    border-radius: 16px;
    margin-left: 6px;
}

.user-info-tag:first-child {
    margin-left: 0;
}

.user-info-tag.stu-tag {
    color: #2250C4;
    background: #F2F7FF;
}

.user-info-tag.cooper-tag {
    color: #E62412;
    background: #FFEDED;
}

.user-info-tag.inside-tag {
    color: #15AD31;
    background: #EDFFED;
}

.user-info-tag.teach-tag {
    background: #FFF7E6;
    color: #FA8C15;
}

/* .user-info-login-list {
    padding: 6px 0;
} */

.user-info-login-list-li {
    width: 100%;
    height: 48px;
}

.user-info-login-list-li:last-child {
    border-top: 1px solid #d0d0d0;
}

.user-info-login-list-li:last-child a {
    color: #8a8a8a;
}

.user-info-login-list-li a {
    display: block;
    width: 100%;
    height: 100%;
    font-size: 14px;
    color: #101010;
    line-height: 48px;
    text-align: center;
}

.user-info-login-list-li.cooper-li a {
    color: #2250C4;
}

.user-info-login-list-li:hover a {
    background: #2250C4;
    color: #fff;
}

.user-info-login-list-li.cooper-li:hover a {
    color: #2250C4;
    background: unset;
}

@media(max-width:760px) {
    body {
        padding-top: 0;
    }
}