:host,:root{--van-pull-refresh-head-height:50px;--van-pull-refresh-head-font-size:var(--van-font-size-md);--van-pull-refresh-head-text-color:var(--van-text-color-2);--van-pull-refresh-loading-icon-size:16px}.van-pull-refresh{overflow:hidden}.van-pull-refresh__track{position:relative;height:100%;transition-property:transform}.van-pull-refresh__head{position:absolute;left:0;width:100%;height:var(--van-pull-refresh-head-height);overflow:hidden;color:var(--van-pull-refresh-head-text-color);font-size:var(--van-pull-refresh-head-font-size);line-height:var(--van-pull-refresh-head-height);text-align:center;transform:translateY(-100%)}.van-pull-refresh__loading .van-loading__spinner{width:var(--van-pull-refresh-loading-icon-size);height:var(--van-pull-refresh-loading-icon-size)}.wrapper[data-v-9fe171d8]{background-color:#f4f4f4;overflow-x:hidden;overflow-y:auto;display:flex;flex-direction:column}.nav-bar[data-v-9fe171d8]{width:100%;height:50px;position:fixed;left:0;top:0;display:flex;flex-direction:row;justify-content:center;align-items:center;margin-bottom:10px;background:#fff}.nav-bar .nav-bar-item[data-v-9fe171d8]{flex:1;text-align:center;font-size:14px;height:50px;line-height:50px}.nav-bar .nav-bar-item.active[data-v-9fe171d8]{color:#3370ff;font-weight:700;border-bottom:2px solid #3370ff}.empty[data-v-9fe171d8]{width:100%;height:100%;background:#fff}.course-list[data-v-9fe171d8]{background:#fff;border-radius:5px;padding:10px}.course-list em[data-v-9fe171d8]{font-size:10px;font-weight:400;font-style:normal}