.bac-fff{background:#fff;padding:1px 20px;min-height:calc(100vh - 150px)}.book-content .download-book{height:50px}.book-content .part{width:50%}.book-content .roll{width:9px;height:9px;border-radius:50%;background:#009788;display:inline-block}.book-content .button-dark{background-color:#009788;color:#fff;border:1px solid #009788}.book-content .button-dark:hover{background-color:#00736c;border-color:#00736c}.book-content .title{font-size:19px;font-family:PingFangSC-Semibold,PingFang SC;font-weight:600;color:#595959;margin-bottom:20px;margin-left:10px}.book-content .description{width:540px;font-size:15px;font-family:PingFangSC-Regular,PingFang SC;font-weight:400;color:#595959;line-height:21px;margin:10px 0 20px 18px}.book-content .infoImg img{width:175px;height:384px}.book-content .infoImg .img-left{margin-left:18px;margin-right:25px}.clear:after{content:".";display:block;height:0;clear:both;visibility:hidden}.clear{zoom:1}.mr-6{margin-right:6px}