.small_pic{ width:520px; object-fit:contain; }
.middle_pic{ width:1040px; object-fit:contain; }
.mainarea{ display:flex; }
.left{ flex:8 0 70%; order:1; margin-top:100px; }
.right{ height:100%; position:sticky; top:0; order:2; flex:1 0 30%; margin-left:10%; }