HTML5颜色渐变3D文字特效

<h1 class="text"><span>Gradient 3D text</span></h1>

body {
			background-color: #272727;
		}
h1 {
    font-family: "Arial", sans-serif;
    font-size: 85px;
    text-align: center;
    font-weight: bold;
    color: #3d3d3d;
    margin-top: 200px;
}

.text {
    position:relative;
}

.text:after {
    content: '';
    position:absolute;
    display:block;
    top:0;
    left:0;
    height:100%;
    width:100%;
    background: -moz-linear-gradient(top,  rgba(39,39,39,1) 0%, rgba(39,39,39,0) 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(39,39,39,1)), color-stop(100%,rgba(39,39,39,0)));
    background: -webkit-linear-gradient(top,  rgba(39,39,39,1) 0%,rgba(39,39,39,0) 100%);
    background: -o-linear-gradient(top,  rgba(39,39,39,1) 0%,rgba(39,39,39,0) 100%);
    background: -ms-linear-gradient(top,  rgba(39,39,39,1) 0%,rgba(39,39,39,0) 100%);
    background: linear-gradient(to bottom,  rgba(39,39,39,1) 0%,rgba(39,39,39,0) 100%);
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#272727', endColorstr='#00272727',GradientType=0 );

    }

span {
    text-shadow: 
     0 -1px 0 #858585,
     0 1px 10px rgba(0,0,0,.6),
     0 6px 1px rgba(0,0,0,.1),
     0 0 5px rgba(0,0,0,.2),
     0 1px 3px rgba(0,0,0,.3),
     0 3px 5px rgba(0,0,0,.2),
     0 7px 10px rgba(0,0,0,.25),
     0 15px 10px rgba(0,0,0,.2),
     0 25px 15px rgba(0,0,0,.15);
}