我发布了一个截图，我的结果与代码和，一个截图与什么结果，我试图做的。我试图嵌入图标到占位符，但它似乎不工作。

<div class="row">
<div class="col-md-6 col-sm-12">
    <label>Name</label>
    <div class="form-field">
        <i class="fa fa-user"></i>
        [text* name placeholder "Enter your name"]
    </div>
</div>
<div class="col-md-6 col-sm-12">
    <label>E-Mail</label>
    <div class="form-field">
        <i class="fa fa-envelope-o"></i>
        [email* email-78 placeholder "Enter your email"]
    </div>
</div>
</div>
<div class="row">
    <div class="col-md-6 col-sm-12">
        <label>Telephone <span style="color:#aaa">(Optional)</span></label>
        <div class="form-field">
            <i class="fa fa-phone"></i>
            [text text-74 placeholder "Enter your phone"]
        </div>
    </div>
    <div class="col-md-6 col-sm-12">
        <label>Website <span style="color:#aaa">(Optional)</span></label>
        <div class="form-field">
            <i class="fa fa-globe"></i>
            [text text-985 placeholder "Enter your website"]
        </div>
    </div>
</div>
<div class="row">
    <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
        <label>Message</label>
        <div class="form-field">
            <i class="fa fa-pencil-square-o"></i>
            [textarea textarea-197 placeholder "Enter your message"]
        </div>
    </div>
</div>
<div class="row">
    <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
        [submit class:btn class:btn-default "SEND YOUR MESSAGE"]
    </div>
</div>

我的结果是：

我想完成这一点：

谢谢您