@charset "UTF-8"; html {
    -webkit-tap-highlight-color: transparent;
    /* 禁止安卓点击高亮 */
    -webkit-text-size-adjust: none;
    /* 禁止移动端开启阅读模式 */
    -webkit-touch-callout: none;
    /* 禁止ios长按时触发系统的菜单 */
    -webkit-overflow-scrolling: touch;
    /* ios滚动条 */
}

* {
    box-sizing: border-box;
}

body {
    min-width: 1250px;
    font-family: "Microsoft Yahei Regular";
    /* transform: scale(0.5); */
}

/* 滚动条,最好只针对PC */
.pc ::-webkit-scrollbar {
    width: 5px;
    height: 5px
}

.pc ::-webkit-scrollbar-corner,::-webkit-scrollbar-track {
    background-color: transparent
}

.pc ::-webkit-scrollbar-thumb {
    border-radius: 10px;
    background-color: rgba(255,191,87,.9)
}

/* ios触发点击 */
.phone,.phone * {
    cursor: pointer
}

/* 设置表单提示文字颜色 */
::-webkit-input-placeholder {
    color: #ccc
}

:-moz-placeholder {
    color: #ccc
}

::-moz-placeholder {
    color: #ccc
}

:-ms-input-placeholder {
    color: #ccc
}

/* 移动端 */
input[type='button'],input[type='submit'],button {
    -webkit-appearance: none
}

/* 禁用ios上的默认按钮 */
a,button,input,textarea {
    -webkit-tap-highlight-color: rgba(0,0,0,0)
}

/* 去除被点击时产生的边框 */
/* 自定义样式 */
.layui-layer {
    top: 0 !important;
    left: 0 !important;
    bottom: 0 !important;
    right: 0 !important;
    margin: auto;
}

.header {
    height: 450px;
    background: url(http://vr.owvlab.com/vlab_files/2021/183/0711/acl0.jpg) center no-repeat;
}

.logo {
    width: 1200px;
    height: 120px;
    margin: 0 auto;
    background: url(http://ilab.ustb.edu.cn/vlab_files/2025/077/0668/130a9.png) left center no-repeat;
    /* background-size: 50%; */
}

.logo a.login-btn {
    display: block;
    float: right;
    width: 90px;
    height: 45px;
    text-align: center;
    padding-left: 6px;
    line-height: 41px;
    font-size: 16px;
    letter-spacing: 5px;
    margin-top: 29px;
    color: #284395;
    font-weight: bold;
    background: url(http://vr.owvlab.com/vlab_files/2021/183/0711/6bad.png) center;
    background-size: 100%;
}

.logo ul {
    float: right;
}

.logo ul li {
    float: left;
    margin-right: 20px;
}

.logo ul li a {
    font-size: 18px;
    color: #fff;
    text-decoration: none;
    line-height: 100px;
}

.title {
    text-align: center;
}

.video-list {
    width: 1200px;
    margin: 50px auto 30px;
}

.carousel {
    width: 1200px;
    height: 400px;
    position: relative;
    clear: both;
    margin: 25px auto 0;
}

.carousel .pics {
    visibility: hidden;
    /* hide images until carousel can handle them */
    cursor: pointer;
    /* otherwise it's not as obvious items can be clicked */
    width: 550px;
    height: 350px;
    box-shadow: 0 0 10px #828282;
    border-radius: 8px;
    overflow: hidden;
}

.waterheel {
    position: relative;
}

.before,.after {
    position: absolute;
    display: block;
    width: 30px;
    height: 30px;
    top: 135px;
    left: 30px;
    z-index: 100;
    cursor: pointer;
    background: url(../img/btns.png) left top no-repeat;
}

.after {
    left: auto;
    right: 30px;
    background-position: right top;
}

.before:hover,.after:hover {
    background-position-y: bottom;
}

.pics-con-01 {
    width: 205px;
    height: 290px;
    overflow: hidden;
}

.pics-con-02 {
    width: 100%;
    height: 100%;
    overflow: hidden;
    /*background: red;*/
}

.pics-con-03 {
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
}

.pics img {
    width: 100%;
    height: 100%;
}

.pics p {
    display: block;
    position: absolute;
    left: 0;
    bottom: 0;
    height: 45px;
    width: 100%;
    text-align: center;
    line-height: 45px;
    font-size: 16px;
    background: url(../img/teacher.png);
}

.pics p span {
    font-size: 14px;
}

.projects {
    width: 1400px;
    margin: 40px auto;
}

.projects .bd {
    margin-top: 40px;
}

.projects .hd {
    text-align: center;
}

.projects .hd a {
    color: #666;
    font-size: 14px;
}

.projects .hd a.prev {
    background: #003d9c;
    color: #fff;
}

.projects .hd a.next {
    background: #fff;
    color: #003d9c;
}

.project-list {
    margin-top: 35px;
}

.project-item {
    position: relative;
    width: 383px;
    height: 310px;
    margin-left: 25px;
    margin-bottom: 25px;
    float: left;
}

.project-item:nth-child(3n+1) {
    margin-left: 0;
}

.project-item img {
    width: 100%;
    height: 255px;
    display: block;
    margin-bottom: 20px;
}

.project-item p {
    color: #444;
    font-size: 18px;
    font-weight: bold;
}

.project-item span {
    display: block;
    position: absolute;
    width: 37px;
    height: 85px;
    font-size: 16px;
    color: #fff;
    left: 30px;
    top: 0;
    padding: 2px 10px;
    background: url(http://vr.owvlab.com/vlab_files/2021/183/0873/2nhvd.png) center;
}

.sort {
    background: #fff;
    padding: 0;
    font-size: 15px;
}

.sort .list {
    width: 100%;
    /* max-width: 1200px; */
    margin: 0 auto;
    display: flex;
    border-bottom: 1px solid #cccccc;
    overflow: hidden;
}

.sort .list label {
    display: block;
    width: 80px;
    text-align: right;
    line-height: 30px;
    margin-top: 5px;
    padding-right: 10px;
}

.sort .list ul {
    /* flex: 1; */
    display: flex;
    gap: 40px;
}

.sort ul li {
    font-size: 14px;
    float: left;
    display: block;
    /* margin-left: 10px; */
    /* margin-top: 5px; */
    padding: 0 0 5px;
    line-height: 30px;
    cursor: pointer;
    /* border-radius: 5px; */
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    position: relative;
}

.sort li.active {
     color: #014999; 
    /* background: #0b64e1; */
    border-color:  #014999;
    /* line-height: 30px; */
}
.sort ul li:after{
    content: "";
    display: block;
    width: 2px;
    height: 14px;
    top: 8px;
    left: -20px;
    position: absolute;
    background: #666666;
}
.img-link {
    width: 100%;
    margin: 0 auto;
    padding-bottom: 40px;
    /* max-width: 1200px; */
    display: flex;
    flex-wrap: wrap;
}

.img-link li {
    width: calc((100% - 75px )/ 4);
    margin-left: 25px;
    margin-top: 25px;
    display: block;
    height: 270px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 0 10px #f1f1f1;
}
.img-link li:nth-child(4n+1){
    margin-left:0
}
.img-link li img {
    display: block;
    width: 100%;
    height: 200px;
    border-radius: 10px 10px 0 0;
}

.img-link li a {
    display: block;
    /*padding-bottom: 15px;*/
    text-decoration: none;
}

.img-link li p {
    font-size: 15px;
    color: #333;
    font-weight: bold;
    padding: 0 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 35px;
    margin-top: 2px;
}

.img-link li span {
    display: block;
    margin-right: 10px;
    color: #fff;
    border-radius: 4px;
    line-height: 22px;
    padding: 0 10px;
    font-size: 12px;
    float: left;
}

.img-link li label {
    display: block;
    float: right;
    color: #999999;
    line-height: 20px;
    padding-left: 20px;
    font-size: 13px;
    background: url(https://oss.rainier.com.cn/a_lend/2022/221/0576/9jhgr.png) left center no-repeat;
    background-size: 16px;
}

.footer {
    background: #091938;
}

.foot-content {
    width: 1400px;
    height: 60px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    
}


.foot-content p, .foot-content p a {
    color: #fff;
    font-size: 14px;
    line-height: 60px;
}

.foot-left {
    margin-top: 25px;
}

.foot-right {
    width: 300px;
}