.wrap-block{
    width: 100%;
}
.header{
    height: 168px;
    background-image: url("../images/header-bg.png");
    background-size: cover;
    background-repeat: no-repeat;
}
.section{
    height: 512px;
    /*height: 753px;*/
    background-image: url("../images/section-bg.png");
    background-size: cover;
    background-repeat: no-repeat;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.nav{
    height: 200px;
    background-color: #FFFFFF;
    display: flex;
    justify-content: center;
    align-items: center;
}
.nav>img{
    width: 1200px;
    height: 180px;
}
.footer{
    height: 80px;
    background-color: #D6D6D6;
}
.center-box{
    width: 1200px;
    height: 216px;
    margin-top: 25px;
    display: flex;
    background-color: #ffffff;
}
.c-left>img{
    width: 228px;
    height: 217px;
}
.c-right>img{
    height: 161px;
    width: 146px;
    margin-left: 36px;
}
.c-right{
    display: flex;
    padding-top: 12px;
    width: 100%;
}
.course-area{
    margin-left: 40px;
    width: 100%;
}
.c-top{
    display: flex;
    padding-top: 10px;
}
.c-top>a>img{
    width: 275px;
    height: 142px;
    margin-right: 28px;
}
.course-list{
    width: 637px;
    display: flex;
    margin-left: 7px;
}
.course-list>a{
    margin-right: 14px;
}
.course-list>a>div{
    height: 30px;
    background: #FFFFFF;
    border: 1px solid #C7C7C7;
    border-radius: 15px;
    padding-left: 11px;
    padding-right: 11px;
    line-height: 30px;
    font-size: 16px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #797979;
}
.course-list span{
    height: 30px;
    background: #FFFFFF;
    border: 1px solid #C7C7C7;
    border-radius: 15px;
    padding-left: 11px;
    padding-right: 11px;
    line-height: 30px;
    font-size: 16px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #797979;
}

.c-bottom{
    display: flex;
    align-items: center;
    margin-top: 10px;
}
.c-bottom>span{
    font-size: 16px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #797979;
}
.c-left{
    position:relative;
}
.c-left>span{
    position: absolute;
    /*font-size: 46px;*/
    font-size: 31px;
    font-family: Source Han Sans CN;
    font-weight: bold;
    color: #FFFFFF;
    top: 75px;
    /*left: 13px;*/
    text-align: center;
    /*left: 38px;*/
}
.footer{
    width: 100%;
    height: 80px;
    background: #D6D6D6;
    text-align: center;
    /*position: fixed;*/
    /*bottom: 0px;*/
    margin-top: 50px;
}
.footer span{
    position: relative;
    bottom: -20px;
    font-size: 14px;
    background: #D6D6D6;
}
.an_title span{
    margin-left: 20px;
}