<div>
    <form class="needs-validation" novalidate>
        <div class="form-group">
            <label for="exampleFormControlTextarea1">试用品货号：</label>
            <textarea product-nums-txt name="cstProductNo" class="form-control" id="exampleFormControlTextarea1" rows="5" required></textarea>
            <input type="hidden" name="type" value="1">
            <div class="invalid-feedback">         
                  请填写产品货号       
            </div>
        </div>
        <div class="form-group">
            <label for="exampleFormControlName">姓名：</label>
            <input type="text" name="cstName" class="form-control" id="exampleFormControlName" required>
        </div>
        <div class="form-group">
            <label for="exampleFormControlPhone">电话：</label>
            <input type="text" name="cstPhone" class="form-control" id="exampleFormControlPhone" required>
        </div>
        <div class="form-group">
            <label for="exampleFormControlInput1">邮箱地址：</label>
            <input type="email" name="cstEmail" class="form-control" id="exampleFormControlInput1" placeholder="name@example.com" required>
        </div>
        <div class="form-group">
            <label for="exampleFormControlCity">您的企业名称：</label>
            <input type="text" name="cstCity" class="form-control" id="exampleFormControlCity" required>
        </div>
        <div class="form-group">
            <label for="exampleFormControlUsefor">申请用途：</label>
            <input type="text" name="usedFor" class="form-control" id="exampleFormControlUsefor" required>
        </div>
       

        <div class="">
            <button class="btn btn-info" type="submit" value="提交内容" style="margin-right: 5rem">提交内容</button>
            <button class="btn btn-secondary" type="reset" value="重置内容">重置内容</button>
        </div>
    </form>
</div>