body { margin: 0px; padding: 0px; }
#solid { width: 345px; height: 269px; clear: both; position: relative; }
#solid .solid0, #solid .solid1, #solid .solid2, #solid .solid3 { position: absolute; left: 0px; top: 0px; width: 100%; height: 269px; display: none; }
#solid .solid0 { background: #78c4db; }
#solid .solid1 { background: #c5c9db; }
#solid .solid2 { background: #e7dfd1; }
#solid .solid3 { background: #c5c9db; }
#solid ul { margin: 0px; padding: 0px; list-style: none; margin-top: 74px;}
#solid ul li { position: absolute; left: 50%; top: 0px; width: 100%; height: 269px; margin-left: -50%; display: none; cursor: pointer; }
#solid #btt { width: 905px; height: 55px; top: 239px; left: 50%; position: relative; margin-left: -452px; }
#solid #btt span { position: absolute; top: 15px; left: 45%; display: block; width: 30px; height: 8px; margin: 0 15px; text-align: center; background: #3d3d3d; z-index: 1000; cursor: pointer; filter: alpha(opacity=70); /*IE滤镜，透明度50%*/ -moz-opacity: 0.7; /*Firefox私有，透明度50%*/ opacity: 0.7;/*其他，透明度50%*/}