/* 保留画布数据分辨率，窄屏只缩放显示。 */
.course-table-scroll{max-width:100%;overflow-x:auto;}
@media(max-width:640px){
.card{padding:18px;}
.grid2,.cards{grid-template-columns:minmax(0,1fr);}
.sidepanel{min-width:0;width:100%;}
.sliderbox{min-width:0;flex-basis:100%;flex-wrap:wrap;padding:10px 12px;}
.sliderbox output{margin-left:auto;}
.sliderbox input[type=range]{min-width:0;width:100%;flex:1 1 100%;order:3;}
.course-table-scroll table{min-width:480px;}
footer{overflow-wrap:anywhere;}
}