body{
    background: #F5F5F5 !important;
  }
  .content_container{
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 32px;
    font-size: 14px;
    color: #555555;
  }
  .top-title{
    text-align: center;
    width: 990px;
    height: 46px;
    font-size: 14px;
    font-weight: 300;
    color: #444444;
    line-height: 32px;
    margin-bottom: 32px;
  }

.course .banner{
    width: 1200px;
    height: 175px;
    background: #FFFFFF;
    border-radius: 5px 5px 5px 5px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-left: 42px;
    background-size: cover;
    background-image: url('../../images/class_bg2x.png');
    background-repeat: no-repeat;

}
.course .banner .banner-item:first-child{
    margin-bottom: 20px;
}
.course .banner .banner-item span:first-child{
    display: inline-block;
    width: 20px;
    height: 20px;
    line-height: 20px;
    text-align: center;
    border-radius: 50%;
    font-size: 12px;
    font-weight: bold;
    color: #35B4C1;
    background: #FFFFFF;
    box-shadow: 0px 0px 3px 1px rgba(53,180,193,0.2);
    margin-right: 16px;
}
.course .banner .banner-item span:last-child{ 
    font-size: 16px;
    color: #206D75; 
}
.course .course-list{
    display: flex;
    flex-wrap: wrap;
}
.course-list .course-list-item{
    display: block;
    margin-bottom: 24px;
    margin-right: 24px;
    width: 588px;
    height: 406px;
    padding: 8px;
    background: #FFFFFF;
    box-shadow: 0px 3px 20px 1px rgba(0,0,0,0.1);
    border-radius: 5px 5px 5px 5px;
}
.course-list-item:nth-child(2n){
    margin-right: 0px;
}
.course-list-item .course-cover{
    margin:0 auto;
    height: 237px;
    width: 572px;
    margin-bottom: 30px;
}

.course-list-item .title{
    font-size: 18px;
    color: #282828;
    font-weight: bold;
    margin-left: 20px;  
    margin-bottom: 30px;
}
.course-list-item .intro{
    margin-left: 20px;
    width: 524px;   
    font-size: 14px;
    color: #8A9199;
    line-height: 26px; 
}

@media screen and (max-width: 450px) {
    html {
      font-size: calc(100vw / 7.5) !important;
    }

    body {
        font-size: 0.14rem !important;
        background: #FFFFFF!important;
    }
    .navbar-toggle{
        /* margin-top: .6rem; */
    }
    .top-title{
        display: none;
    }
    .course .banner{ 
        display: flex;
        justify-content: flex-start;
        padding:.4rem;
        width: 7.5rem;
        height: 5.3rem;
        background: #FFFFFF;
        border-radius: 0px 0px 0px 0px;
        background-size: cover;
        background-image: url('https://ibodao-nc.obs.cn-east-3.myhuaweicloud.com/uploads/2024/05-10/663d88a425284.png');
        background-repeat: no-repeat;
    }    
    .course .banner .banner-item{
        display: flex; 
    }
    .course .banner .banner-item:first-child{ 
        margin-bottom: .3rem;
    }
    .course .banner .banner-item span:first-child{
        display: flex;
        width: .48rem ;
        height: .48rem ;  
        line-height: .48rem ;  
        justify-content: center;
        align-items: center;
        border-radius: 50%;
        font-size: .28rem;
        font-weight: bold;
        color: #35B4C1;
        background: #FFFFFF; 
        margin-right: .24rem; 
    }
    .course .banner .banner-item span:last-child{ 
        display: flex; 
        width: 5.74rem;
        font-size: .26rem;
        line-height: .48rem;
        text-align: left;
        color: #206D75; 
    }
 
    .course .course-list{
        display: flex; 
        align-items: center;
        padding:.4rem 0;
        width: 100vw;
    }
    .course-list .course-list-item{
        margin:0 .4rem;
        display: block;
        margin-bottom: .4rem; 
        /* width: 100%; */
        height: 5.33rem;
        padding: 0rem;
        background: #FFFFFF;
        box-shadow: none;
        border-radius: 5px 5px 5px 5px;
    }
    .course-list-item:first-child{
        border-bottom: 1px solid #E1E6F0;
    }
    .course-list-item .course-cover{
        margin:0 auto;
        height: 2.78rem;
        width: 6.7rem;
        margin-bottom: .3rem;
    }
    .course-list-item .title{
        font-size: .3rem;
        color: #282828;
        font-weight: bold;
        margin-left: 0px;  
        margin-bottom: .3rem;
    }
    .course-list-item .intro{
        margin-left: 0rem;
        width: 6.7rem;   
        font-size: .24rem;
        color: #8A9199;
        line-height: .4rem; 
    }
}