change class 'co sc' when resize
change class 'co sc' when resize

balibell/waterfall,balibell/waterfall,PegasusWang/waterfall,duitang/waterfall,PegasusWang/waterfall,visaxin/waterfall,visaxin/waterfall,WeBest/waterfall-1,duitang/waterfall,PanSusie/waterfall,WeBest/waterfall-1,PanSusie/waterfall