* {
    padding: 0;
    margin: 0;
    -webkit-user-select: none;
    cursor: default;
    font-family: "Helvetica Neue", "HelveticaNeue", "Helvetica Neue", "微软雅黑", Calibri, Helvetica, Arial;
    color: #333;
}

body, html {
    height: 100%;
}

button:active, button:focus {
    outline: none;
}

.topBar {
    width: 100%;
    height: 60px;
    padding: 10px 0;
}

.topBar .topBarContent {
    width: 1000px;
    margin: 0 auto;
}

.topBar .topBarContent:after {
    content: '';
    display: block;
    clear: both;
}

.topBar .logo {
    height: 60px;
    float: left;
}

.topBar .topMenu {
    float: right;
}

.topBar .topMenu a {
    display: inline-block;
    line-height: 60px;
    font-size: 18px;
    width: 100px;
    text-decoration: none;
    cursor: pointer;
    text-align: center;
}

.topBar .topMenu a.active {
    color: #08408D;
}

.main {
    height: calc(100% - 60px);
    min-height: 1250px;
    background-image: url('../img/helpbg.jpg');
    background-size: 100%;
    background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
    transition: all 0.38s;
    -webkit-transition: all 0.38s;
    -moz-transition: all 0.38s;
}

.main h2 {
    text-align: center;
    font-weight: normal;
    font-size: 34px;
    padding: 20px 0 0 0;
}

.main h2 span {

}

.main h1 {
    text-align: center;
    font-size: 56px;
    font-weight: lighter;
    margin: 0 0 40px 0;
}

.main .menu {
    width: 490px;
    margin: 10px auto 10px auto;
}

.main .menu .btn {
    width: 134px;
    height: 40px;
    border: solid 1px #004394;
    color: #333;
    border-radius: 4px;
    background-color: transparent;
    margin: 0 13px;
    font-size: 16px;
}

.main .menu .btn.active,
.main .menu .btn:hover {
    background-color: #628ABB;
    color: #fff;
}

.main .videoList {
    width: 1000px;
    height: 330px;
    margin: 0 auto;
    padding: 20px 0;
    position: relative;
}

.main .videoList .videoContent {
    position: absolute;
    width: 100%;
    -webkit-transition: all 0.38s;
    -moz-transition: all 0.38s;
    -ms-transition: all 0.38s;
    -o-transition: all 0.38s;
    transition: all 0.38s;
    opacity: 0;
    visibility: hidden;
}

.main .videoList .videoContent.active {
    opacity: 1;
    visibility: visible;
}

.main #campaignVideoObj {
    width: 480px;
    height: 320px;
    margin: 0 auto;
    border-radius: 8px;
    border: solid #333 5px;
    position: relative;
}

.main #featureVideo .videoObj,
.main #tutorialVideo .videoObj {
    width: 172px;
    height: 120px;
    float: left;
    margin: 0 26px 20px 26px;
    position: relative;
    border-radius: 4px;
    border: solid #333 4px;
}

.main #featureVideo .videoObj .title,
.main #tutorialVideo .videoObj .title {
    width: 100%;
    text-align: center;
    color: #fff;
    line-height: 120px;
    z-index: 100;
    position: absolute;
}

.main #featureVideo h1,
.main #tutorialVideo h1 {
    font-size: 18px;
    color: #333;
    margin: 0 0 20px 0px;
    padding: 40px 0 10px 0;
    position: relative;
}

.main #featureVideo h1:before,
.main #tutorialVideo h1:before {
    content: '';
    display: block;
    width: 30%;
    position: absolute;
    left: 0;
    bottom: 19px;
    height: 1px;
    background-color: #E4E4E4;
}

.main #featureVideo h1:after,
.main #tutorialVideo h1:after {
    content: '';
    display: block;
    width: 30%;
    position: absolute;
    right: 0;
    bottom: 19px;
    height: 1px;
    background-color: #E4E4E4;
}

.main .studentFeature {
    width: 80%;
    margin: 0 auto;
}

.main #featureVideo .studentFeature,
.main #featureVideo .teacherFeature {
    width: 70%;
    margin: 0 auto;
}

.main .studentFeature .videoWrapper,
.main .teacherFeature .videoWrapper {
    position: relative;
}

.main .studentFeature .tab,
.main .teacherFeature .tab {
    width: 80px;
    float: left;
    border: solid 1px #A7B7D1;
}

.main .studentFeature .tab .tabItem,
.main .teacherFeature .tab .tabItem {
    width: 80px;
    height: 90px;
    border: none;
    background-color: transparent;
}

.main .studentFeature .tab .tabItem.active,
.main .teacherFeature .tab .tabItem.active {
    background-color: #CFD7E5;
}

.main .studentFeature .tabContent,
.main .teacherFeature .tabContent {
    float: left;
    height: 280px;
    overflow: auto;
}

.main .studentFeature .tabContent:after,
.main .teacherFeature .tabContent:after {
    content: '';
    display: block;
    clear: both;
}

.main .videoContentWrapper {
    position: absolute;
    visibility: hidden;
    transform: translate(80%);
    -webkit-transform: translate(80%);
    opacity: 0;
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
}

.main .videoContentWrapper.active {
    visibility: visible;
    opacity: 1;
    transform: translate(0px);
    -webkit-transform: translate(0px);
}

.main .studentFeature .videoWrapper:after,
.main .teacherFeature .videoWrapper:after {
    content: '';
    display: block;
    clear: both;
}

.main .teacherFeature {
    width: 80%;
    margin: 0 auto;
}

.main .studentFeature:after,
.main .teacherFeature:after {
    content: '';
    display: block;
    clear: both;
}

.main .videoObj .thumbnail {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
}

.main .videoObj:after {
    content: '';
    display: block;
    position: absolute;
    background-color: rgba(0, 0, 0, 0.5);
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}

.main .videoObj .playButton {
    background-image: url('../img/playBtn.png');
    width: 65px;
    height: 65px;
    background-size: 65px;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -32px;
    opacity: 0.6;
    z-index: 10;
}

.main .videoObj:hover .playButton {
    opacity: 1;
}

.main #featureVideo .videoObj .playButton,
.main #tutorialVideo .videoObj .playButton {
    background-image: url('../img/playBtnXs.png');
    width: 21px;
    height: 21px;
    background-size: 100%;
    position: absolute;
    right: 10px;
    left: auto;
    top: auto;
    margin: 0;
    bottom: 10px;
    opacity: 0.6;
    cursor: pointer;
    z-index: 100;
}

.main #featureVideo .videoObj:hover .playButton,
.main #tutorialVideo .videoObj:hover .playButton {
    opacity: 1;
}

.footer {
    position: absolute;
    bottom: 0;
    height: 60px;
    width: 100%;
    background-color: #33363A;
    text-align: center;
    display: table;
}

.footer .footerContent {
    font-size: 18px;
    display: table-cell;
    vertical-align: middle;
}

.footer .footerContent p {
    color: #fff;
}

.footer .footerContent p span {
    color: #fff;
}

.footer .footerContent .copyRight {
    font-size: 12px;
}

.videoPlayer {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #666;
    background-color: rgba(0, 0, 0, 0.8);
    opacity: 0;
    visibility: hidden;
    z-index: 100;
}

.videoPlayer.active {
    opacity: 1;
    visibility: visible;
}

#videoPlayerContent {
    width: 640px;
    height: 365px;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -182px -320px;
}

#fpContent {
    position: absolute;
    top: 0;
}

#videoPlayerContent .fp-fullscreen {
    right: 50px;
}

#videoPlayerContent .fp-close {
    width: 30px;
    height: 30px;
    background-image: url('../img/fp-close.png');
    right: 10px;
    position: absolute;
    z-index: 100;
    top: 10px;
}

@media (max-width: 769px) {
    .topBar {
        height: 40px;
    }

    .topBar .logo {
        height: 40px;
    }

    .topBar .topBarContent {
        width: 100%;
    }

    .topBar .topMenu a {
        line-height: 40px;
        width: 70px;
        font-size: 16px;
    }

    .main {
        min-height: 1250px;
    }

    .main h2 {
        font-size: 22px;
        padding: 30px 0 5px 0;
    }

    .main h2 span {
        line-height: 12px;
        width: 20px;
    }

    .main h1 {
        font-size: 36px;
        padding: 0px 0 0px 0;
    }

    .main .menu {
        width: 90%;
        margin: 0 auto;
    }

    .main .menu:after {
        content: '';
        display: block;
        clear: both;
    }

    .main .menu .btn {
        width: 30%;
        margin: 0 1.6%;
        float: left;
    }

    .main .studentFeature .tab,
    .main .teacherFeature .tab {
        margin-top: 4px;
    }

    .main .studentFeature .tabContent,
    .main .teacherFeature .tabContent {
        height: 360px;
    }

    .main .videoList {
        width: 90%;
        height: 210px;
    }

    .main #campaignVideoObj {
        width: 270px;
        height: 200px;
        border-radius: 8px;
        border: solid #333 2px;
    }

    .main .studentFeature .tabContent,
    .main .teacherFeature .tabContent {
        width: calc(100% - 82px);
    }

    .main .videoContentWrapper {
        width: 100%;
    }

    .main #featureVideo .studentFeature,
    .main #featureVideo .teacherFeature,
    .main #tutorialVideo .studentFeature,
    .main #tutorialVideo .teacherFeature {
        width: 100%;
        margin: 0 auto;
    }

    .main #featureVideo .videoObj {
        width: calc(50% - 16px);
        height: 100px;
        float: left;
        margin: 4px 4px;
        position: relative;
        border-radius: 4px;
        border: solid #333 4px;
    }

    .main #tutorialVideo .videoObj {
        width: calc(100% - 86px);
        height: 60px;
        float: left;
        margin: 4px 4px;
        position: relative;
        border-radius: 0px;
        border: solid 1px #CFD7E5;
        background-color: #EEF1F6;
    }

    .main #featureVideo .videoObj .title {
        line-height: 100px;
    }

    .main #tutorialVideo .videoObj .title {
        line-height: 60px;
        background-color: #EEF1F6;
        color: #333;
        text-align: left;
        padding: 0 0 0 10px;
        width: calc(100% - 10px);
    }

    .main #tutorialVideo .videoObj .playButton {
        bottom: 20px;
    }

    #videoPlayerContent {
        width: 80%;
        height: 40%;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        -webkit-transform: translate(-50%, -50%);
        margin: 0;
    }
}