input#doc-vld-name { background: none; border-radius: 30px; border: 1px solid #9194a7; color: #feffff; text-indent: 10px; line-height: 26px; font-size: 12px;}
select#doc-vld-select { background: none; border-radius: 30px; border: 1px solid #9194a7; color: #feffff; text-indent: 10px; line-height: 26px; font-size: 12px;}
<form action="" class="am-form">
<fieldset>
<div class="am-form-group">
<label for="doc-vld-name">用户名</label>
<input type="text" id="doc-vld-name" minlength="3" placeholder="User ID" class="am-form-field" required/>
</div>
<div class="am-form-group">
<label for="doc-vld-name">密码</label>
<input type="password" id="doc-vld-name" minlength="3" placeholder="User Password" class="am-form-field" required/>
</div>
<div class="am-form-group">
<label for="doc-vld-name">密码</label>
<select id="doc-vld-select" class="am-input-sm am-round">
<option value="option1">选项一...</option>
<option value="option2">选项二.....</option>
<option value="option3">选项三........</option>
</select>
</div>
<div class="am-form-group myapp-login-treaty"><label class="am-form-label"></label><label class="am-checkbox-inline"> <input type="checkbox" value="橘子" name="docVlCb" minchecked="2" maxchecked="4" required="">已同意使用条约 </label></div>
<button class="myapp-login-button am-btn am-btn-secondary" type="submit">登录</button>
</fieldset>
<legend>Forgot Password?</legend>
</form>
