h1{ font:100px/200px "微软雅黑"; text-align:center; color:#000; text-shadow:0 0 0 rgba(0,0,0,1); border:1px solid #000; transition:1s;}
h1:hover{color:rgba(0,0,0,0);text-shadow:0 0 100px rgba(0,0,0,0.5);}
h1:hover{color:rgba(0,0,0,0);text-shadow:0 0 100px rgba(0,0,0,0.5);}