.input_video{width:100%;height:400px;margin:0 auto;margin-top:30px}.pic1{width:100%;height:100%}.xuexizhuanqu .xuexizhuanqu-h4{border-left:.25rem solid #5693ea;background-color:transparent;border-bottom:none;margin:15px 0;padding:0 0 0 1rem;line-height:17px}.xuexizhuanqu .xuexizhuanqu-h4,.xuexizhuanqu .xuexizhuanqu-h4 a{font-size:16px;font-family:PingFangSC-Medium,PingFang SC;font-weight:800;color:#333}.xuexizhuanqu .xuexizhuanqu-h4 a{text-decoration:none}.xuexizhuanqu .xuexi-list{list-style:none;margin:0;padding:15px}.xuexizhuanqu .xuexi-list,.xuexizhuanqu .xuexi-list .xuexi-item{display:-webkit-box;display:-ms-flexbox;display:flex;-ms-flex-wrap:wrap;flex-wrap:wrap;background-color:#fff}.xuexizhuanqu .xuexi-list .xuexi-item{position:relative;border-bottom:1px solid #e9ecf2;padding-top:15px;padding-bottom:15px}.xuexizhuanqu .xuexi-list .xuexi-item .txt-block{margin-top:5px;max-width:calc(100% - 113px)}.xuexizhuanqu .xuexi-list .xuexi-item .txt-block .title{margin:0 24px 0 0}.xuexizhuanqu .xuexi-list .xuexi-item .txt-block .title a{text-decoration:none;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;font-size:16px;font-family:PingFangSC-Medium,PingFang SC;font-weight:800;color:#333}.xuexizhuanqu .xuexi-list .xuexi-item .txt-block .abstract{overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:12px;line-height:18px;font-family:PingFangSC-Regular,PingFang SC;font-weight:400;color:#666;margin:10px 24px 10px 0}.xuexizhuanqu .xuexi-list .xuexi-item .img-block{position:relative;text-align:center;max-width:113px}.xuexizhuanqu .xuexi-list .xuexi-item .img-block .a_image{position:relative;width:100%;display:block;overflow:hidden}.xuexizhuanqu .xuexi-list .xuexi-item .img-block .a_image img{max-width:100%;border-radius:4px}.font_text{font-size:17px;font-weight:500;color:#fff;line-height:24px;padding-bottom:10px}