*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}



body{
    min-width: 1200px;
    color: #333;
}
.all{
    max-width: 1920px;
    margin: 0 auto;
}

ul,ol{list-style-type:none;}
a{text-decoration:none;}
img {
    border: none;
    vertical-align: middle;
}
.clearfix:after {
    content: ".";
    display: block;
    height: 0;
    font-size: 0;
    clear: both;
    visibility: hidden;
    }
    .clearfix {
    zoom: 1;
    }
.inline{
    display: inline;
}
.inline-block{
    display: inline-block;
}
.fl{
    float: left
}

.fr{
    float: right
}
.wth1200{
    width: 1200px;
    margin: 0 auto;
}

.nav_wrap{
    width: 100%;
    height: 60px;
    overflow: hidden;
    background-color: #444444;
    color: #ffffff;
    box-shadow: 1px 2px 8px 0px rgba(36, 45, 57, 0.19);
}
.nav{
    width: 1200px;
    height: 60px;
    line-height: 60px;
    margin: 0px auto;
    /* overflow: hidden; */
    box-sizing: border-box;
}
.nav .head_logo{
    float: left;
    margin-right: 30px;
}
.nav .head_logo img{
    height: 30px;
    margin-bottom: 2px;
}
.head_nav{
    float: left;
}
.head_nav a{
    display: inline-block;
    margin: 0 15px;
    /*color: #666666;*/
    color: #ffffff;
}
.head_nav a:hover{
    color: #4197ea;
}
.nav .login_wrap{
    float: right;
}

.demo{
    min-width: 1200px;
}
.banner_top{
    width: 100%;
    height:auto ;

}
.warp{
    width: 1200px;
    min-width:1200px ;
    margin: auto;
    /* padding-bottom: 1000px; */
    overflow: hidden;
}
.title{
    margin-top: 40px;
    margin-bottom: 40px;
}
.title img{
    height: 34px;
    display: block;
    margin: 0 auto;
}
.title_text{
    font-size: 18px;
    font-weight: bold;
    line-height: 18px;
    color: #333333;
}
.title_text1{
    margin-top: 70px;
    font-size: 18px;
    font-weight: bold;
    color: #0166E2;

}
.futitle_text{
    margin-top: 10px;
    font-family: MiSans;
    font-size: 16px;
    line-height: 24px;
    color: #333333;

}
.title_img{
    height: 48px;
    margin-top: 20px;
}

.mt20{
    margin-top: 20px;
}
.futitle{
    display: flex;
    justify-content: space-between;
}
.futitle .left{
    width: 980px;
    line-height: 24px;
    font-size: 16px;
    color: #333333;

}
.futitle .right{
    width: 135px;
    height: 36px;
    border-radius: 18px;
    background: #FFFFFF;
    box-sizing: border-box;
    border: 1px solid #0166E2;
    font-size: 14px;
    line-height: 36px;
    color: #0166E2;
    text-align: center;
    margin-top: 6px;
}
.futitle .right2{
    width: 110px;
}
.futitle .right img{
    vertical-align: middle;
    margin-top: -3px;
}
.md20{
    margin-bottom: 20px;
}
.bottom_border{
    position: absolute;
    width: 30px;
    height: 3px;
    background: #82191D;
    bottom: 0;
    left: 50%;
    margin-left: -15px;
}
.topic{
   overflow: hidden;
}
.topic_item{
    width: 99%;
    /*height: 100%;*/
    border-bottom: 11px solid #E5E8EB;
    margin-bottom: 34px;
    float: left;
    /* clear:both; */
}
.title2{
    margin-top: 79px;
}
.courseList{
    display: flex;
    /*    justify-content: space-between;*/
    flex-wrap: wrap;
}
.courseItem{
    margin-bottom: 20px;
    width: 25%;
}
.courseItem img{
    width: 280px;
    height: 158px;
}
.courseListBox{
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.courseItem33{
    margin-top: 20px;
    margin-bottom: 40px;
    width: 31.66%;
}
.courseItem25{
    margin-top: 20px;
    margin-bottom: 40px;
    width: 23.33%;
}

.courseItem50{
    margin-top: 20px;
    width: 48.33%;
}
/*.courseList:after{
    content: "";
    height: 0;
    width:38%;
}
#course-3:after{
    content: "";
    height: 0;
    width:59%;
}
#course-6:after{
    content: "";
    height: 0;
    width:17%;
}*/
.mb10{
    margin-bottom: 10px;
}
.mr30{margin-right: 30px}
.message{
    width: 211px;
    font-size: 14px;
    font-weight: 400;
    color: #333333;
    margin: auto;
    margin-bottom: 67px;
}