.roll { width: 1100px; height: 190px; margin: 20px auto 0; position: relative; }
.btn_left { display: block; width: 40px; height: 68px; background: url(../images/btn.jpg) no-repeat -70px -69px; position: absolute; top: 51px; left: 1px; z-index: 1; }
.btn_left:hover { background: url(../images/btn.jpg) no-repeat -70px 0; }
.btn_right { display: block; width: 40px; height: 68px; background: url(../images/btn.jpg) no-repeat -24px -69px; position: absolute; top: 51px; right: 0; z-index: 1; }
.btn_right:hover { background: url(../images/btn.jpg) no-repeat -24px 0; }
.roll .wrap { width: 990px; height: 190px; margin: 0 auto; position: relative; overflow: hidden; }
.roll ul { position: absolute; top: 0; left: 0; }
.roll li { float: left; width: 248px; height: 190px; text-align: center; }
.roll li img{width:225px; height:160px;border: 1px solid #999; border-radius:5px;padding:1px;}
.roll li a:hover { position: relative; top: 2px; }

.control { border-bottom: 1px solid #ccc; background: #eee; text-align: center; padding: 20px 0; }