              </div>
                <div class="ui field">
                    <div class="ui left icon input">
                        <i class="ui user icon small"></i>
                        <input type="text" name="username" v-model="username" placeholder="请输入用户名" maxlength="200" />
                    </div>
                </div>
                <div class="ui field">
                    <div class="ui left icon input">
                        <i class="ui lock icon small"></i>
         