手机图片自适应宽度

img {
    height: auto;
    width: auto\9;
    width:100%;
}

.gradient{
width:100%;
height:35px;
color:#fff;
font-size:18px;
font-weight:bold;
line-height:35px;
background:-webkit-gradient(linear, 0 0, 0 bottom, from(#ce0f17), to(rgba(176, 5, 21, 0.7)));
text-align:center;
}