.teach-page .teach-page-card{max-height:calc(100vh - 250px);overflow-y:auto}.teach-page .teach-page-card .el-collapse-item__content>div,.teach-page .teach-page-card .el-collapse-item__content>div>div{padding:5px 0}.teach-page .teach-page-card ._red{color:#f56c6c}.teach-page img{width:90%}