transform: rotate3d(x, y, z, rotation angle);
1 point: transform-origin by default 2 point : construct by .rotated { transform: rotate3d (1, -1, 0, 60deg); } x=1, y=-1, z=0, rotation angle = 60deg
1 point: transform-origin by default 2 point : construct by .rotated { transform: rotate3d (1, -1, 1, 60deg); } x=1, y=-1, z=1, rotation angle = 60deg