css3动画从入门到精通

box-shadow-1{ from{ box-shadow:0 0 black;} to{ box-shadow:0 150px 10px -50px rgba(0,0,0,.5);} } 范例二 .box-shadow -2 { animation:1s ease 0s alternate none infinite box-shadow-2;} @keyframes box-shadow-2{ from{ box-shadow