.pageContent{
    position: relative;
    width: 100%;
}
.pageCenter{
    position: relative;
    width: 1440px;
    left: 50%;
    margin-left: -720px;
}
div,span,p,input,img{
    box-sizing: border-box;
}
/* 学习st */
.contentLineWrap{
    height: 80px;
}
.tutorialsContent{
    background-color: #fff;
    background-image: url('../img/bg.png');
    background-size: 100% auto;
    background-position: top left;
    background-repeat: no-repeat;
}
.contentNavItemW{
    font-size: 0;
    line-height: 20px;
    padding-top: 50px;
    padding-top: 36px;
    padding-bottom: 24px;
}
.navItem{
    font-size: 14px;
    color: #5D5D5E;
}
.navItemResult{
    color: #222;
}
.navGap{
    font-size: 14px;
    color: #5D5D5E; 
    margin: 0 5px;
}
/* 教程卡片 */
.cardWrap{
    font-size: 0;
    padding-bottom: 96px;
}
.card{
    display: inline-block;
    width: 464px;
    height: 374px;
    border-radius: 8px;
    background: rgba(255,255,255,0.8);
    overflow: hidden;
    margin-right: 24px;
    margin-bottom: 24px;
    cursor: pointer;
    box-shadow: 0px 4px 30px 0px rgba(0, 0, 0, 0.06);
    vertical-align: top;
}
.card:nth-child(3n){
    margin-right: 0;
}
.cardT{
    height: 310px;
    overflow: hidden;
    position: relative;
}
.cardTPlayBtn{
    position: absolute;
    width: 64px;
    height: 64px;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 50%;
    background-image: url(../img/play.svg?2);
    background-position: 20px 19px;
    background-repeat: no-repeat;
    top: 50%;
    margin-top: -32px;
    left: 50%;
    margin-left: -32px;
    border: 2px solid rgba(255,255,255,0.9);
}
.cardTImg{
    height: 100%;
    width: 100%;
    vertical-align: top;
    -webkit-transition: all 0.4s ease-in-out;
    transition: all 0.4s ease-in-out;
}
.card:hover .cardTPlayBtn{
    background-color: #FF6933;
    border: 2px solid #FF6933;
}
.card:hover .cardTImg{
    -ms-transform: scale(1.05);
    /* IE 9 */
    -moz-transform: scale(1.05);
    /* Firefox */
    -webkit-transform: scale(1.05);
    /* Safari 和 Chrome */
    -o-transform: scale(1.05);
    /* Opera */
    transform: scale(1.05);
}
.cardB{
    height: 64px;
    line-height: 64px;
    padding:0 16px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 16px;
    color: #222222;
}
/* 视频大屏播放 */
#videoModal{
    display: none;
    position: fixed;
    z-index: 100000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.6);
}
.modal-content {
    width: 1200px;
    height: 613px;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    text-align: center;
}
#modalVideo{
    max-width: 100%;
    max-height: 100%;
    vertical-align: top;
}
.close{
    position: fixed;
    top: 10px;
    right: 10px;
    width: 34px;
    height: 34px;
    border: 1px solid #fff;
    text-align: center;
    line-height: 30px;
    font-size: 22px;
    color: #fff;
    cursor: pointer;
    border-radius: 50%;
    z-index: 100000;
}