body {background: #000;}
#div1 {position:relative; width:850px; height:850px; margin: 20px auto 0;}
#div1 a {position:absolute; top:0px; left:0px; font-family: Microsoft YaHei; color:#fff; font-weight:bold; text-decoration:none; padding: 3px 6px; }
#div1 a:hover { border: 1px solid #eee; z-index:90; }
#div1 a:hover img { transform: scale(1.1); transition:all 0.3s ease-in-out;}
#div1 .blue { color: blue; }
#div1 .red {color:red;}
#div1 .yellow {color:yellow;}