阴影效果

.shadow-text-xs {
  text-shadow: 4px 3px 0 #1d9d74, 9px 8px 0 rgba(0, 0, 0, 0.15);
} /*智能兼容ie10以上 暂不考虑*/

.shadow-xs {
  -ms-filter: "progid:DXImageTransform.Microsoft.Shadow(Strength=1, Direction=100, Color='#cccccc')"; /* For IE 8 */
  filter: progid:DXImageTransform.Microsoft.Shadow(Strength=1, Direction=100, Color='#cccccc'); /* For IE 5.5 - 7 */
  -moz-box-shadow: 1px 1px 2px #cccccc; /* for firefox */
  -webkit-box-shadow: 1px 1px 2px #cccccc; /* for safari or chrome */
  box-shadow: 1px 1px 2px #cccccc; /* for opera or ie9 */
}
.shadow-sm {
  -ms-filter: "progid:DXImageTransform.Microsoft.Shadow(Strength=2, Direction=120, Color='#cccccc')"; /* For IE 8 */
  filter: progid:DXImageTransform.Microsoft.Shadow(Strength=2, Direction=120, Color='#cccccc'); /* For IE 5.5 - 7 */
  -moz-box-shadow: 2px 2px 3px #cccccc; /* for firefox */
  -webkit-box-shadow: 2px 2px 3px #cccccc; /* for safari or chrome */
  box-shadow: 2px 2px 3px #cccccc; /* for opera or ie9 */
}
.shadow-md {
  -ms-filter: "progid:DXImageTransform.Microsoft.Shadow(Strength=3, Direction=135, Color='#cccccc')"; /* For IE 8 */
  filter: progid:DXImageTransform.Microsoft.Shadow(Strength=3, Direction=135, Color='#cccccc'); /* For IE 5.5 - 7 */
  -moz-box-shadow: 3px 3px 5px #cccccc; /* for firefox */
  -webkit-box-shadow: 3px 3px 5px #cccccc; /* for safari or chrome */
  box-shadow: 3px 3px 5px #cccccc; /* for opera or ie9 */
}
.shadow-lg {
  -ms-filter: "progid:DXImageTransform.Microsoft.Shadow(Strength=5, Direction=150, Color='#cccccc')"; /* For IE 8 */
  filter: progid:DXImageTransform.Microsoft.Shadow(Strength=5, Direction=150, Color='#cccccc'); /* For IE 5.5 - 7 */
  -moz-box-shadow: 5px 5px 8px #cccccc; /* for firefox */
  -webkit-box-shadow: 5px 5px 8px #cccccc; /* for safari or chrome */
  box-shadow: 5px 5px 8px #cccccc; /* for opera or ie9 */
}