.grace-dsc-web-layout-box{width:100%;position:relative}.index_box .index_btn{position:absolute;width:100%;height:100%;z-index:3;top:0;left:0}.index_box>img{width:100%}.index_box .index_logo{position:absolute;top:20px;left:20px;width:10%}.index_box .nv{position:absolute;bottom:24%;left:10%;width:22%;animation:floatUpDown 3s ease-in-out infinite}.index_box .nan{position:absolute;bottom:0%;right:4%;width:28%;animation:floatUpDown 3s ease-in-out infinite}.footer{position:absolute;bottom:0;left:0;width:100%;line-height:10px;text-align:center;color:#fff;font-size:12px}@keyframes floatUpDown{0%{transform:translateY(0)}50%{transform:translateY(-50px)}to{transform:translateY(0)}}