漂亮的文本输入框

 样式如上：

input {
    color:#333;
    line-height:normal;
    font-family:"Microsoft YaHei",Tahoma,Verdana,SimSun;
    font-style:normal;
    font-variant:normal;
    font-size-adjust:none;
    font-stretch:normal;
    font-weight:normal;
    margin-top:0px;
    margin-bottom:0px;
    margin-left:0px;
    padding-top:4px;
    padding-right:4px;
    padding-bottom:4px;
    padding-left:4px;
    font-size:15px;
    outline-width:medium;
    outline-style:none;
    outline-color:invert;
    border-top-left-radius:3px;
    border-top-right-radius:3px;
    border-bottom-left-radius:3px;
    border-bottom-right-radius:3px;
    text-shadow:0px 1px 2px #fff;
    background-attachment:scroll;
    background-repeat:repeat-x;
    background-position-x:left;
    background-position-y:top;
    background-size:auto;
    background-origin:padding-box;
    background-clip:border-box;
    background-color:rgb(255,255,255);
    margin-right:8px;
    border-top-color:#ccc;
    border-right-color:#ccc;
    border-bottom-color:#ccc;
    border-left-color:#ccc;
    border-top-width:1px;
    border-right-width:1px;
    border-bottom-width:1px;
    border-left-width:1px;
    border-top-style:solid;
    border-right-style:solid;
    border-bottom-style:solid;
    border-left-style:solid;
}