更新logo背景素材
更新logo背景素材

TakWolf/CNode-Material-Design,wendal/NutzCN-Material-Design,liqk2014/CNode-Material-Design,TakWolf/CNode-Material-Design,wendal/NutzCN-Material-Design,wendal/NutzCN-Material-Design,xuanxinpl/CNode-Material-Design,TakWolf/CNode-Material-Design